enic: add Cisco 10G Ethernet NIC driver
Scott Feldman [Mon, 15 Sep 2008 16:17:11 +0000 (09:17 -0700)]
Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

29 files changed:
MAINTAINERS
drivers/net/Kconfig
drivers/net/Makefile
drivers/net/enic/Makefile [new file with mode: 0644]
drivers/net/enic/cq_desc.h [new file with mode: 0644]
drivers/net/enic/cq_enet_desc.h [new file with mode: 0644]
drivers/net/enic/enic.h [new file with mode: 0644]
drivers/net/enic/enic_main.c [new file with mode: 0644]
drivers/net/enic/enic_res.c [new file with mode: 0644]
drivers/net/enic/enic_res.h [new file with mode: 0644]
drivers/net/enic/rq_enet_desc.h [new file with mode: 0644]
drivers/net/enic/vnic_cq.c [new file with mode: 0644]
drivers/net/enic/vnic_cq.h [new file with mode: 0644]
drivers/net/enic/vnic_dev.c [new file with mode: 0644]
drivers/net/enic/vnic_dev.h [new file with mode: 0644]
drivers/net/enic/vnic_devcmd.h [new file with mode: 0644]
drivers/net/enic/vnic_enet.h [new file with mode: 0644]
drivers/net/enic/vnic_intr.c [new file with mode: 0644]
drivers/net/enic/vnic_intr.h [new file with mode: 0644]
drivers/net/enic/vnic_nic.h [new file with mode: 0644]
drivers/net/enic/vnic_resource.h [new file with mode: 0644]
drivers/net/enic/vnic_rq.c [new file with mode: 0644]
drivers/net/enic/vnic_rq.h [new file with mode: 0644]
drivers/net/enic/vnic_rss.h [new file with mode: 0644]
drivers/net/enic/vnic_stats.h [new file with mode: 0644]
drivers/net/enic/vnic_wq.c [new file with mode: 0644]
drivers/net/enic/vnic_wq.h [new file with mode: 0644]
drivers/net/enic/wq_enet_desc.h [new file with mode: 0644]
include/linux/pci_ids.h

index b3e92fb..467f994 100644 (file)
@@ -1046,6 +1046,13 @@ L:       cbe-oss-dev@ozlabs.org
 W:     http://www.ibm.com/developerworks/power/cell/
 S:     Supported
 
+CISCO 10G ETHERNET DRIVER
+P:     Scott Feldman
+M:     scofeldm@cisco.com
+P:     Joe Eykholt
+M:     jeykholt@cisco.com
+S:     Supported
+
 CFAG12864B LCD DRIVER
 P:     Miguel Ojeda Sandonis
 M:     miguel.ojeda.sandonis@gmail.com
index 81a3e95..5c012cd 100644 (file)
@@ -2388,6 +2388,13 @@ config EHEA
          To compile the driver as a module, choose M here. The module
          will be called ehea.
 
+config ENIC
+       tristate "E, the Cisco 10G Ethernet NIC"
+       depends on PCI && INET
+       select INET_LRO
+       help
+         This enables the support for the Cisco 10G Ethernet card.
+
 config IXGBE
        tristate "Intel(R) 10GbE PCI Express adapters support"
        depends on PCI && INET
index 9221346..d4ec6ba 100644 (file)
@@ -19,6 +19,7 @@ obj-$(CONFIG_ATL2) += atlx/
 obj-$(CONFIG_ATL1E) += atl1e/
 obj-$(CONFIG_GIANFAR) += gianfar_driver.o
 obj-$(CONFIG_TEHUTI) += tehuti.o
+obj-$(CONFIG_ENIC) += enic/
 
 gianfar_driver-objs := gianfar.o \
                gianfar_ethtool.o \
diff --git a/drivers/net/enic/Makefile b/drivers/net/enic/Makefile
new file mode 100644 (file)
index 0000000..391c3bc
--- /dev/null
@@ -0,0 +1,5 @@
+obj-$(CONFIG_ENIC) := enic.o
+
+enic-y := enic_main.o vnic_cq.o vnic_intr.o vnic_wq.o \
+       enic_res.o vnic_dev.o vnic_rq.o
+
diff --git a/drivers/net/enic/cq_desc.h b/drivers/net/enic/cq_desc.h
new file mode 100644 (file)
index 0000000..c036a8b
--- /dev/null
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _CQ_DESC_H_
+#define _CQ_DESC_H_
+
+/*
+ * Completion queue descriptor types
+ */
+enum cq_desc_types {
+       CQ_DESC_TYPE_WQ_ENET = 0,
+       CQ_DESC_TYPE_DESC_COPY = 1,
+       CQ_DESC_TYPE_WQ_EXCH = 2,
+       CQ_DESC_TYPE_RQ_ENET = 3,
+       CQ_DESC_TYPE_RQ_FCP = 4,
+};
+
+/* Completion queue descriptor: 16B
+ *
+ * All completion queues have this basic layout.  The
+ * type_specfic area is unique for each completion
+ * queue type.
+ */
+struct cq_desc {
+       __le16 completed_index;
+       __le16 q_number;
+       u8 type_specfic[11];
+       u8 type_color;
+};
+
+#define CQ_DESC_TYPE_BITS        7
+#define CQ_DESC_TYPE_MASK        ((1 << CQ_DESC_TYPE_BITS) - 1)
+#define CQ_DESC_COLOR_MASK       1
+#define CQ_DESC_Q_NUM_BITS       10
+#define CQ_DESC_Q_NUM_MASK       ((1 << CQ_DESC_Q_NUM_BITS) - 1)
+#define CQ_DESC_COMP_NDX_BITS    12
+#define CQ_DESC_COMP_NDX_MASK    ((1 << CQ_DESC_COMP_NDX_BITS) - 1)
+
+static inline void cq_desc_dec(const struct cq_desc *desc_arg,
+       u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
+{
+       const struct cq_desc *desc = desc_arg;
+       const u8 type_color = desc->type_color;
+
+       *color = (type_color >> CQ_DESC_TYPE_BITS) & CQ_DESC_COLOR_MASK;
+
+       /*
+        * Make sure color bit is read from desc *before* other fields
+        * are read from desc.  Hardware guarantees color bit is last
+        * bit (byte) written.  Adding the rmb() prevents the compiler
+        * and/or CPU from reordering the reads which would potentially
+        * result in reading stale values.
+        */
+
+       rmb();
+
+       *type = type_color & CQ_DESC_TYPE_MASK;
+       *q_number = le16_to_cpu(desc->q_number) & CQ_DESC_Q_NUM_MASK;
+       *completed_index = le16_to_cpu(desc->completed_index) &
+               CQ_DESC_COMP_NDX_MASK;
+}
+
+#endif /* _CQ_DESC_H_ */
diff --git a/drivers/net/enic/cq_enet_desc.h b/drivers/net/enic/cq_enet_desc.h
new file mode 100644 (file)
index 0000000..03dce9e
--- /dev/null
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _CQ_ENET_DESC_H_
+#define _CQ_ENET_DESC_H_
+
+#include "cq_desc.h"
+
+/* Ethernet completion queue descriptor: 16B */
+struct cq_enet_wq_desc {
+       __le16 completed_index;
+       __le16 q_number;
+       u8 reserved[11];
+       u8 type_color;
+};
+
+static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
+       u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
+{
+       cq_desc_dec((struct cq_desc *)desc, type,
+               color, q_number, completed_index);
+}
+
+/* Completion queue descriptor: Ethernet receive queue, 16B */
+struct cq_enet_rq_desc {
+       __le16 completed_index_flags;
+       __le16 q_number_rss_type_flags;
+       __le32 rss_hash;
+       __le16 bytes_written_flags;
+       __le16 vlan;
+       __le16 checksum_fcoe;
+       u8 flags;
+       u8 type_color;
+};
+
+#define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT          (0x1 << 12)
+#define CQ_ENET_RQ_DESC_FLAGS_FCOE                  (0x1 << 13)
+#define CQ_ENET_RQ_DESC_FLAGS_EOP                   (0x1 << 14)
+#define CQ_ENET_RQ_DESC_FLAGS_SOP                   (0x1 << 15)
+
+#define CQ_ENET_RQ_DESC_RSS_TYPE_BITS               4
+#define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
+       ((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
+#define CQ_ENET_RQ_DESC_RSS_TYPE_NONE               0
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4               1
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4           2
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6               3
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6           4
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX            5
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX        6
+
+#define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC         (0x1 << 14)
+
+#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS          14
+#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
+       ((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED             (0x1 << 14)
+#define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED         (0x1 << 15)
+
+#define CQ_ENET_RQ_DESC_FCOE_SOF_BITS               4
+#define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
+       ((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FCOE_EOF_BITS               8
+#define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
+       ((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT              8
+
+#define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK       (0x1 << 0)
+#define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK              (0x1 << 0)
+#define CQ_ENET_RQ_DESC_FLAGS_UDP                   (0x1 << 1)
+#define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR              (0x1 << 1)
+#define CQ_ENET_RQ_DESC_FLAGS_TCP                   (0x1 << 2)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK          (0x1 << 3)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV6                  (0x1 << 4)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4                  (0x1 << 5)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT         (0x1 << 6)
+#define CQ_ENET_RQ_DESC_FLAGS_FCS_OK                (0x1 << 7)
+
+static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
+       u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
+       u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
+       u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
+       u8 *vlan_stripped, u16 *vlan, u16 *checksum, u8 *fcoe_sof,
+       u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
+       u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
+       u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
+{
+       u16 completed_index_flags = le16_to_cpu(desc->completed_index_flags);
+       u16 q_number_rss_type_flags =
+               le16_to_cpu(desc->q_number_rss_type_flags);
+       u16 bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
+
+       cq_desc_dec((struct cq_desc *)desc, type,
+               color, q_number, completed_index);
+
+       *ingress_port = (completed_index_flags &
+               CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
+       *fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
+               1 : 0;
+       *eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
+               1 : 0;
+       *sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
+               1 : 0;
+
+       *rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
+               CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
+       *csum_not_calc = (q_number_rss_type_flags &
+               CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
+
+       *rss_hash = le32_to_cpu(desc->rss_hash);
+
+       *bytes_written = bytes_written_flags &
+               CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
+       *packet_error = (bytes_written_flags &
+               CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
+       *vlan_stripped = (bytes_written_flags &
+               CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
+
+       *vlan = le16_to_cpu(desc->vlan);
+
+       if (*fcoe) {
+               *fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
+                       CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
+               *fcoe_fc_crc_ok = (desc->flags &
+                       CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
+               *fcoe_enc_error = (desc->flags &
+                       CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
+               *fcoe_eof = (u8)((desc->checksum_fcoe >>
+                       CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
+                       CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
+               *checksum = 0;
+       } else {
+               *fcoe_sof = 0;
+               *fcoe_fc_crc_ok = 0;
+               *fcoe_enc_error = 0;
+               *fcoe_eof = 0;
+               *checksum = le16_to_cpu(desc->checksum_fcoe);
+       }
+
+       *tcp_udp_csum_ok =
+               (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
+       *udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
+       *tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
+       *ipv4_csum_ok =
+               (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
+       *ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
+       *ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
+       *ipv4_fragment =
+               (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
+       *fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
+}
+
+#endif /* _CQ_ENET_DESC_H_ */
diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
new file mode 100644 (file)
index 0000000..fb83c92
--- /dev/null
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _ENIC_H_
+#define _ENIC_H_
+
+#include <linux/inet_lro.h>
+
+#include "vnic_enet.h"
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "vnic_cq.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "vnic_rss.h"
+
+#define DRV_NAME               "enic"
+#define DRV_DESCRIPTION                "Cisco 10G Ethernet Driver"
+#define DRV_VERSION            "0.0.1.18163.472"
+#define DRV_COPYRIGHT          "Copyright 2008 Cisco Systems, Inc"
+#define PFX                    DRV_NAME ": "
+
+#define ENIC_LRO_MAX_DESC      8
+#define ENIC_LRO_MAX_AGGR      64
+
+enum enic_cq_index {
+       ENIC_CQ_RQ,
+       ENIC_CQ_WQ,
+       ENIC_CQ_MAX,
+};
+
+enum enic_intx_intr_index {
+       ENIC_INTX_WQ_RQ,
+       ENIC_INTX_ERR,
+       ENIC_INTX_NOTIFY,
+       ENIC_INTX_MAX,
+};
+
+enum enic_msix_intr_index {
+       ENIC_MSIX_RQ,
+       ENIC_MSIX_WQ,
+       ENIC_MSIX_ERR,
+       ENIC_MSIX_NOTIFY,
+       ENIC_MSIX_MAX,
+};
+
+struct enic_msix_entry {
+       int requested;
+       char devname[IFNAMSIZ];
+       irqreturn_t (*isr)(int, void *);
+       void *devid;
+};
+
+/* Per-instance private data structure */
+struct enic {
+       struct net_device *netdev;
+       struct pci_dev *pdev;
+       struct vnic_enet_config config;
+       struct vnic_dev_bar bar0;
+       struct vnic_dev *vdev;
+       struct net_device_stats net_stats;
+       struct timer_list notify_timer;
+       struct work_struct reset;
+       struct msix_entry msix_entry[ENIC_MSIX_MAX];
+       struct enic_msix_entry msix[ENIC_MSIX_MAX];
+       u32 msg_enable;
+       spinlock_t devcmd_lock;
+       u8 mac_addr[ETH_ALEN];
+       u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
+       unsigned int mc_count;
+       int csum_rx_enabled;
+       u32 port_mtu;
+
+       /* work queue cache line section */
+       ____cacheline_aligned struct vnic_wq wq[1];
+       spinlock_t wq_lock[1];
+       unsigned int wq_count;
+       struct vlan_group *vlan_group;
+
+       /* receive queue cache line section */
+       ____cacheline_aligned struct vnic_rq rq[1];
+       unsigned int rq_count;
+       int (*rq_alloc_buf)(struct vnic_rq *rq);
+       struct napi_struct napi;
+       struct net_lro_mgr lro_mgr;
+       struct net_lro_desc lro_desc[ENIC_LRO_MAX_DESC];
+
+       /* interrupt resource cache line section */
+       ____cacheline_aligned struct vnic_intr intr[ENIC_MSIX_MAX];
+       unsigned int intr_count;
+       u32 __iomem *legacy_pba;                /* memory-mapped */
+
+       /* completion queue cache line section */
+       ____cacheline_aligned struct vnic_cq cq[ENIC_CQ_MAX];
+       unsigned int cq_count;
+};
+
+#endif /* _ENIC_H_ */
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
new file mode 100644 (file)
index 0000000..4cf5ec7
--- /dev/null
@@ -0,0 +1,1949 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/ethtool.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/tcp.h>
+
+#include "cq_enet_desc.h"
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "enic_res.h"
+#include "enic.h"
+
+#define ENIC_NOTIFY_TIMER_PERIOD       (2 * HZ)
+#define ENIC_JUMBO_FIRST_BUF_SIZE      256
+
+/* Supported devices */
+static struct pci_device_id enic_id_table[] = {
+       { PCI_VDEVICE(CISCO, 0x0043) },
+       { 0, }  /* end of table */
+};
+
+MODULE_DESCRIPTION(DRV_DESCRIPTION);
+MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DEVICE_TABLE(pci, enic_id_table);
+
+struct enic_stat {
+       char name[ETH_GSTRING_LEN];
+       unsigned int offset;
+};
+
+#define ENIC_TX_STAT(stat)     \
+       { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
+#define ENIC_RX_STAT(stat)     \
+       { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
+
+static const struct enic_stat enic_tx_stats[] = {
+       ENIC_TX_STAT(tx_frames_ok),
+       ENIC_TX_STAT(tx_unicast_frames_ok),
+       ENIC_TX_STAT(tx_multicast_frames_ok),
+       ENIC_TX_STAT(tx_broadcast_frames_ok),
+       ENIC_TX_STAT(tx_bytes_ok),
+       ENIC_TX_STAT(tx_unicast_bytes_ok),
+       ENIC_TX_STAT(tx_multicast_bytes_ok),
+       ENIC_TX_STAT(tx_broadcast_bytes_ok),
+       ENIC_TX_STAT(tx_drops),
+       ENIC_TX_STAT(tx_errors),
+       ENIC_TX_STAT(tx_tso),
+};
+
+static const struct enic_stat enic_rx_stats[] = {
+       ENIC_RX_STAT(rx_frames_ok),
+       ENIC_RX_STAT(rx_frames_total),
+       ENIC_RX_STAT(rx_unicast_frames_ok),
+       ENIC_RX_STAT(rx_multicast_frames_ok),
+       ENIC_RX_STAT(rx_broadcast_frames_ok),
+       ENIC_RX_STAT(rx_bytes_ok),
+       ENIC_RX_STAT(rx_unicast_bytes_ok),
+       ENIC_RX_STAT(rx_multicast_bytes_ok),
+       ENIC_RX_STAT(rx_broadcast_bytes_ok),
+       ENIC_RX_STAT(rx_drop),
+       ENIC_RX_STAT(rx_no_bufs),
+       ENIC_RX_STAT(rx_errors),
+       ENIC_RX_STAT(rx_rss),
+       ENIC_RX_STAT(rx_crc_errors),
+       ENIC_RX_STAT(rx_frames_64),
+       ENIC_RX_STAT(rx_frames_127),
+       ENIC_RX_STAT(rx_frames_255),
+       ENIC_RX_STAT(rx_frames_511),
+       ENIC_RX_STAT(rx_frames_1023),
+       ENIC_RX_STAT(rx_frames_1518),
+       ENIC_RX_STAT(rx_frames_to_max),
+};
+
+static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
+static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
+
+static int enic_get_settings(struct net_device *netdev,
+       struct ethtool_cmd *ecmd)
+{
+       struct enic *enic = netdev_priv(netdev);
+
+       ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
+       ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
+       ecmd->port = PORT_FIBRE;
+       ecmd->transceiver = XCVR_EXTERNAL;
+
+       if (netif_carrier_ok(netdev)) {
+               ecmd->speed = vnic_dev_port_speed(enic->vdev);
+               ecmd->duplex = DUPLEX_FULL;
+       } else {
+               ecmd->speed = -1;
+               ecmd->duplex = -1;
+       }
+
+       ecmd->autoneg = AUTONEG_DISABLE;
+
+       return 0;
+}
+
+static void enic_get_drvinfo(struct net_device *netdev,
+       struct ethtool_drvinfo *drvinfo)
+{
+       struct enic *enic = netdev_priv(netdev);
+       struct vnic_devcmd_fw_info *fw_info;
+
+       spin_lock(&enic->devcmd_lock);
+       vnic_dev_fw_info(enic->vdev, &fw_info);
+       spin_unlock(&enic->devcmd_lock);
+
+       strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
+       strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
+       strncpy(drvinfo->fw_version, fw_info->fw_version,
+               sizeof(drvinfo->fw_version));
+       strncpy(drvinfo->bus_info, pci_name(enic->pdev),
+               sizeof(drvinfo->bus_info));
+}
+
+static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
+{
+       unsigned int i;
+
+       switch (stringset) {
+       case ETH_SS_STATS:
+               for (i = 0; i < enic_n_tx_stats; i++) {
+                       memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
+                       data += ETH_GSTRING_LEN;
+               }
+               for (i = 0; i < enic_n_rx_stats; i++) {
+                       memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
+                       data += ETH_GSTRING_LEN;
+               }
+               break;
+       }
+}
+
+static int enic_get_stats_count(struct net_device *netdev)
+{
+       return enic_n_tx_stats + enic_n_rx_stats;
+}
+
+static void enic_get_ethtool_stats(struct net_device *netdev,
+       struct ethtool_stats *stats, u64 *data)
+{
+       struct enic *enic = netdev_priv(netdev);
+       struct vnic_stats *vstats;
+       unsigned int i;
+
+       spin_lock(&enic->devcmd_lock);
+       vnic_dev_stats_dump(enic->vdev, &vstats);
+       spin_unlock(&enic->devcmd_lock);
+
+       for (i = 0; i < enic_n_tx_stats; i++)
+               *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
+       for (i = 0; i < enic_n_rx_stats; i++)
+               *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
+}
+
+static u32 enic_get_rx_csum(struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       return enic->csum_rx_enabled;
+}
+
+static int enic_set_rx_csum(struct net_device *netdev, u32 data)
+{
+       struct enic *enic = netdev_priv(netdev);
+
+       enic->csum_rx_enabled =
+               (data && ENIC_SETTING(enic, RXCSUM)) ? 1 : 0;
+
+       return 0;
+}
+
+static int enic_set_tx_csum(struct net_device *netdev, u32 data)
+{
+       struct enic *enic = netdev_priv(netdev);
+
+       if (data && ENIC_SETTING(enic, TXCSUM))
+               netdev->features |= NETIF_F_HW_CSUM;
+       else
+               netdev->features &= ~NETIF_F_HW_CSUM;
+
+       return 0;
+}
+
+static int enic_set_tso(struct net_device *netdev, u32 data)
+{
+       struct enic *enic = netdev_priv(netdev);
+
+       if (data && ENIC_SETTING(enic, TSO))
+               netdev->features |=
+                       NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
+       else
+               netdev->features &=
+                       ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
+
+       return 0;
+}
+
+static u32 enic_get_msglevel(struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       return enic->msg_enable;
+}
+
+static void enic_set_msglevel(struct net_device *netdev, u32 value)
+{
+       struct enic *enic = netdev_priv(netdev);
+       enic->msg_enable = value;
+}
+
+static struct ethtool_ops enic_ethtool_ops = {
+       .get_settings = enic_get_settings,
+       .get_drvinfo = enic_get_drvinfo,
+       .get_msglevel = enic_get_msglevel,
+       .set_msglevel = enic_set_msglevel,
+       .get_link = ethtool_op_get_link,
+       .get_strings = enic_get_strings,
+       .get_stats_count = enic_get_stats_count,
+       .get_ethtool_stats = enic_get_ethtool_stats,
+       .get_rx_csum = enic_get_rx_csum,
+       .set_rx_csum = enic_set_rx_csum,
+       .get_tx_csum = ethtool_op_get_tx_csum,
+       .set_tx_csum = enic_set_tx_csum,
+       .get_sg = ethtool_op_get_sg,
+       .set_sg = ethtool_op_set_sg,
+       .get_tso = ethtool_op_get_tso,
+       .set_tso = enic_set_tso,
+};
+
+static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
+{
+       struct enic *enic = vnic_dev_priv(wq->vdev);
+
+       if (buf->sop)
+               pci_unmap_single(enic->pdev, buf->dma_addr,
+                       buf->len, PCI_DMA_TODEVICE);
+       else
+               pci_unmap_page(enic->pdev, buf->dma_addr,
+                       buf->len, PCI_DMA_TODEVICE);
+
+       if (buf->os_buf)
+               dev_kfree_skb_any(buf->os_buf);
+}
+
+static void enic_wq_free_buf(struct vnic_wq *wq,
+       struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
+{
+       enic_free_wq_buf(wq, buf);
+}
+
+static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
+       u8 type, u16 q_number, u16 completed_index, void *opaque)
+{
+       struct enic *enic = vnic_dev_priv(vdev);
+
+       spin_lock(&enic->wq_lock[q_number]);
+
+       vnic_wq_service(&enic->wq[q_number], cq_desc,
+               completed_index, enic_wq_free_buf,
+               opaque);
+
+       if (netif_queue_stopped(enic->netdev) &&
+           vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1)
+               netif_wake_queue(enic->netdev);
+
+       spin_unlock(&enic->wq_lock[q_number]);
+
+       return 0;
+}
+
+static void enic_log_q_error(struct enic *enic)
+{
+       unsigned int i;
+       u32 error_status;
+
+       for (i = 0; i < enic->wq_count; i++) {
+               error_status = vnic_wq_error_status(&enic->wq[i]);
+               if (error_status)
+                       printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
+                               enic->netdev->name, i, error_status);
+       }
+
+       for (i = 0; i < enic->rq_count; i++) {
+               error_status = vnic_rq_error_status(&enic->rq[i]);
+               if (error_status)
+                       printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
+                               enic->netdev->name, i, error_status);
+       }
+}
+
+static void enic_link_check(struct enic *enic)
+{
+       int link_status = vnic_dev_link_status(enic->vdev);
+       int carrier_ok = netif_carrier_ok(enic->netdev);
+
+       if (link_status && !carrier_ok) {
+               printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
+               netif_carrier_on(enic->netdev);
+       } else if (!link_status && carrier_ok) {
+               printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
+               netif_carrier_off(enic->netdev);
+       }
+}
+
+static void enic_mtu_check(struct enic *enic)
+{
+       u32 mtu = vnic_dev_mtu(enic->vdev);
+
+       if (mtu != enic->port_mtu) {
+               if (mtu < enic->netdev->mtu)
+                       printk(KERN_WARNING PFX
+                               "%s: interface MTU (%d) set higher "
+                               "than switch port MTU (%d)\n",
+                               enic->netdev->name, enic->netdev->mtu, mtu);
+               enic->port_mtu = mtu;
+       }
+}
+
+static void enic_msglvl_check(struct enic *enic)
+{
+       u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
+
+       if (msg_enable != enic->msg_enable) {
+               printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
+                       enic->netdev->name, enic->msg_enable, msg_enable);
+               enic->msg_enable = msg_enable;
+       }
+}
+
+static void enic_notify_check(struct enic *enic)
+{
+       enic_msglvl_check(enic);
+       enic_mtu_check(enic);
+       enic_link_check(enic);
+}
+
+#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
+
+static irqreturn_t enic_isr_legacy(int irq, void *data)
+{
+       struct net_device *netdev = data;
+       struct enic *enic = netdev_priv(netdev);
+       u32 pba;
+
+       vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
+
+       pba = vnic_intr_legacy_pba(enic->legacy_pba);
+       if (!pba) {
+               vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
+               return IRQ_NONE;        /* not our interrupt */
+       }
+
+       if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY))
+               enic_notify_check(enic);
+
+       if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
+               enic_log_q_error(enic);
+               /* schedule recovery from WQ/RQ error */
+               schedule_work(&enic->reset);
+               return IRQ_HANDLED;
+       }
+
+       if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
+               if (netif_rx_schedule_prep(netdev, &enic->napi))
+                       __netif_rx_schedule(netdev, &enic->napi);
+       } else {
+               vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
+       }
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t enic_isr_msi(int irq, void *data)
+{
+       struct enic *enic = data;
+
+       /* With MSI, there is no sharing of interrupts, so this is
+        * our interrupt and there is no need to ack it.  The device
+        * is not providing per-vector masking, so the OS will not
+        * write to PCI config space to mask/unmask the interrupt.
+        * We're using mask_on_assertion for MSI, so the device
+        * automatically masks the interrupt when the interrupt is
+        * generated.  Later, when exiting polling, the interrupt
+        * will be unmasked (see enic_poll).
+        *
+        * Also, the device uses the same PCIe Traffic Class (TC)
+        * for Memory Write data and MSI, so there are no ordering
+        * issues; the MSI will always arrive at the Root Complex
+        * _after_ corresponding Memory Writes (i.e. descriptor
+        * writes).
+        */
+
+       netif_rx_schedule(enic->netdev, &enic->napi);
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t enic_isr_msix_rq(int irq, void *data)
+{
+       struct enic *enic = data;
+
+       /* schedule NAPI polling for RQ cleanup */
+       netif_rx_schedule(enic->netdev, &enic->napi);
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t enic_isr_msix_wq(int irq, void *data)
+{
+       struct enic *enic = data;
+       unsigned int wq_work_to_do = -1; /* no limit */
+       unsigned int wq_work_done;
+
+       wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
+               wq_work_to_do, enic_wq_service, NULL);
+
+       vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
+               wq_work_done,
+               1 /* unmask intr */,
+               1 /* reset intr timer */);
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t enic_isr_msix_err(int irq, void *data)
+{
+       struct enic *enic = data;
+
+       enic_log_q_error(enic);
+
+       /* schedule recovery from WQ/RQ error */
+       schedule_work(&enic->reset);
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t enic_isr_msix_notify(int irq, void *data)
+{
+       struct enic *enic = data;
+
+       enic_notify_check(enic);
+       vnic_intr_unmask(&enic->intr[ENIC_MSIX_NOTIFY]);
+
+       return IRQ_HANDLED;
+}
+
+static inline void enic_queue_wq_skb_cont(struct enic *enic,
+       struct vnic_wq *wq, struct sk_buff *skb,
+       unsigned int len_left)
+{
+       skb_frag_t *frag;
+
+       /* Queue additional data fragments */
+       for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
+               len_left -= frag->size;
+               enic_queue_wq_desc_cont(wq, skb,
+                       pci_map_page(enic->pdev, frag->page,
+                               frag->page_offset, frag->size,
+                               PCI_DMA_TODEVICE),
+                       frag->size,
+                       (len_left == 0));       /* EOP? */
+       }
+}
+
+static inline void enic_queue_wq_skb_vlan(struct enic *enic,
+       struct vnic_wq *wq, struct sk_buff *skb,
+       int vlan_tag_insert, unsigned int vlan_tag)
+{
+       unsigned int head_len = skb_headlen(skb);
+       unsigned int len_left = skb->len - head_len;
+       int eop = (len_left == 0);
+
+       /* Queue the main skb fragment */
+       enic_queue_wq_desc(wq, skb,
+               pci_map_single(enic->pdev, skb->data,
+                       head_len, PCI_DMA_TODEVICE),
+               head_len,
+               vlan_tag_insert, vlan_tag,
+               eop);
+
+       if (!eop)
+               enic_queue_wq_skb_cont(enic, wq, skb, len_left);
+}
+
+static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
+       struct vnic_wq *wq, struct sk_buff *skb,
+       int vlan_tag_insert, unsigned int vlan_tag)
+{
+       unsigned int head_len = skb_headlen(skb);
+       unsigned int len_left = skb->len - head_len;
+       unsigned int hdr_len = skb_transport_offset(skb);
+       unsigned int csum_offset = hdr_len + skb->csum_offset;
+       int eop = (len_left == 0);
+
+       /* Queue the main skb fragment */
+       enic_queue_wq_desc_csum_l4(wq, skb,
+               pci_map_single(enic->pdev, skb->data,
+                       head_len, PCI_DMA_TODEVICE),
+               head_len,
+               csum_offset,
+               hdr_len,
+               vlan_tag_insert, vlan_tag,
+               eop);
+
+       if (!eop)
+               enic_queue_wq_skb_cont(enic, wq, skb, len_left);
+}
+
+static inline void enic_queue_wq_skb_tso(struct enic *enic,
+       struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
+       int vlan_tag_insert, unsigned int vlan_tag)
+{
+       unsigned int head_len = skb_headlen(skb);
+       unsigned int len_left = skb->len - head_len;
+       unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+       int eop = (len_left == 0);
+
+       /* Preload TCP csum field with IP pseudo hdr calculated
+        * with IP length set to zero.  HW will later add in length
+        * to each TCP segment resulting from the TSO.
+        */
+
+       if (skb->protocol == __constant_htons(ETH_P_IP)) {
+               ip_hdr(skb)->check = 0;
+               tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
+                       ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
+       } else if (skb->protocol == __constant_htons(ETH_P_IPV6)) {
+               tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
+                       &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
+       }
+
+       /* Queue the main skb fragment */
+       enic_queue_wq_desc_tso(wq, skb,
+               pci_map_single(enic->pdev, skb->data,
+                       head_len, PCI_DMA_TODEVICE),
+               head_len,
+               mss, hdr_len,
+               vlan_tag_insert, vlan_tag,
+               eop);
+
+       if (!eop)
+               enic_queue_wq_skb_cont(enic, wq, skb, len_left);
+}
+
+static inline void enic_queue_wq_skb(struct enic *enic,
+       struct vnic_wq *wq, struct sk_buff *skb)
+{
+       unsigned int mss = skb_shinfo(skb)->gso_size;
+       unsigned int vlan_tag = 0;
+       int vlan_tag_insert = 0;
+
+       if (enic->vlan_group && vlan_tx_tag_present(skb)) {
+               /* VLAN tag from trunking driver */
+               vlan_tag_insert = 1;
+               vlan_tag = vlan_tx_tag_get(skb);
+       }
+
+       if (mss)
+               enic_queue_wq_skb_tso(enic, wq, skb, mss,
+                       vlan_tag_insert, vlan_tag);
+       else if (skb->ip_summed == CHECKSUM_PARTIAL)
+               enic_queue_wq_skb_csum_l4(enic, wq, skb,
+                       vlan_tag_insert, vlan_tag);
+       else
+               enic_queue_wq_skb_vlan(enic, wq, skb,
+                       vlan_tag_insert, vlan_tag);
+}
+
+/* netif_tx_lock held, process context with BHs disabled */
+static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       struct vnic_wq *wq = &enic->wq[0];
+       unsigned long flags;
+
+       if (skb->len <= 0) {
+               dev_kfree_skb(skb);
+               return NETDEV_TX_OK;
+       }
+
+       /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
+        * which is very likely.  In the off chance it's going to take
+        * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
+        */
+
+       if (skb_shinfo(skb)->gso_size == 0 &&
+           skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
+           skb_linearize(skb)) {
+               dev_kfree_skb(skb);
+               return NETDEV_TX_OK;
+       }
+
+       spin_lock_irqsave(&enic->wq_lock[0], flags);
+
+       if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) {
+               netif_stop_queue(netdev);
+               /* This is a hard error, log it */
+               printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
+                       "queue awake!\n", netdev->name);
+               spin_unlock_irqrestore(&enic->wq_lock[0], flags);
+               return NETDEV_TX_BUSY;
+       }
+
+       enic_queue_wq_skb(enic, wq, skb);
+
+       if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1)
+               netif_stop_queue(netdev);
+
+       netdev->trans_start = jiffies;
+
+       spin_unlock_irqrestore(&enic->wq_lock[0], flags);
+
+       return NETDEV_TX_OK;
+}
+
+/* dev_base_lock rwlock held, nominally process context */
+static struct net_device_stats *enic_get_stats(struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       struct vnic_stats *stats;
+
+       spin_lock(&enic->devcmd_lock);
+       vnic_dev_stats_dump(enic->vdev, &stats);
+       spin_unlock(&enic->devcmd_lock);
+
+       enic->net_stats.tx_packets = stats->tx.tx_frames_ok;
+       enic->net_stats.tx_bytes = stats->tx.tx_bytes_ok;
+       enic->net_stats.tx_errors = stats->tx.tx_errors;
+       enic->net_stats.tx_dropped = stats->tx.tx_drops;
+
+       enic->net_stats.rx_packets = stats->rx.rx_frames_ok;
+       enic->net_stats.rx_bytes = stats->rx.rx_bytes_ok;
+       enic->net_stats.rx_errors = stats->rx.rx_errors;
+       enic->net_stats.multicast = stats->rx.rx_multicast_frames_ok;
+       enic->net_stats.rx_crc_errors = stats->rx.rx_crc_errors;
+       enic->net_stats.rx_dropped = stats->rx.rx_no_bufs;
+
+       return &enic->net_stats;
+}
+
+static void enic_reset_mcaddrs(struct enic *enic)
+{
+       enic->mc_count = 0;
+}
+
+static int enic_set_mac_addr(struct net_device *netdev, char *addr)
+{
+       if (!is_valid_ether_addr(addr))
+               return -EADDRNOTAVAIL;
+
+       memcpy(netdev->dev_addr, addr, netdev->addr_len);
+
+       return 0;
+}
+
+/* netif_tx_lock held, BHs disabled */
+static void enic_set_multicast_list(struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       struct dev_mc_list *list = netdev->mc_list;
+       int directed = 1;
+       int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
+       int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
+       int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
+       int allmulti = (netdev->flags & IFF_ALLMULTI) ||
+           (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
+       u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
+       unsigned int mc_count = netdev->mc_count;
+       unsigned int i, j;
+
+       if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
+               mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
+
+       spin_lock(&enic->devcmd_lock);
+
+       vnic_dev_packet_filter(enic->vdev, directed,
+               multicast, broadcast, promisc, allmulti);
+
+       /* Is there an easier way?  Trying to minimize to
+        * calls to add/del multicast addrs.  We keep the
+        * addrs from the last call in enic->mc_addr and
+        * look for changes to add/del.
+        */
+
+       for (i = 0; list && i < mc_count; i++) {
+               memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
+               list = list->next;
+       }
+
+       for (i = 0; i < enic->mc_count; i++) {
+               for (j = 0; j < mc_count; j++)
+                       if (compare_ether_addr(enic->mc_addr[i],
+                               mc_addr[j]) == 0)
+                               break;
+               if (j == mc_count)
+                       enic_del_multicast_addr(enic, enic->mc_addr[i]);
+       }
+
+       for (i = 0; i < mc_count; i++) {
+               for (j = 0; j < enic->mc_count; j++)
+                       if (compare_ether_addr(mc_addr[i],
+                               enic->mc_addr[j]) == 0)
+                               break;
+               if (j == enic->mc_count)
+                       enic_add_multicast_addr(enic, mc_addr[i]);
+       }
+
+       /* Save the list to compare against next time
+        */
+
+       for (i = 0; i < mc_count; i++)
+               memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
+
+       enic->mc_count = mc_count;
+
+       spin_unlock(&enic->devcmd_lock);
+}
+
+/* rtnl lock is held */
+static void enic_vlan_rx_register(struct net_device *netdev,
+       struct vlan_group *vlan_group)
+{
+       struct enic *enic = netdev_priv(netdev);
+       enic->vlan_group = vlan_group;
+}
+
+/* rtnl lock is held */
+static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
+{
+       struct enic *enic = netdev_priv(netdev);
+
+       spin_lock(&enic->devcmd_lock);
+       enic_add_vlan(enic, vid);
+       spin_unlock(&enic->devcmd_lock);
+}
+
+/* rtnl lock is held */
+static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
+{
+       struct enic *enic = netdev_priv(netdev);
+
+       spin_lock(&enic->devcmd_lock);
+       enic_del_vlan(enic, vid);
+       spin_unlock(&enic->devcmd_lock);
+}
+
+/* netif_tx_lock held, BHs disabled */
+static void enic_tx_timeout(struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       schedule_work(&enic->reset);
+}
+
+static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
+{
+       struct enic *enic = vnic_dev_priv(rq->vdev);
+
+       if (!buf->os_buf)
+               return;
+
+       pci_unmap_single(enic->pdev, buf->dma_addr,
+               buf->len, PCI_DMA_FROMDEVICE);
+       dev_kfree_skb_any(buf->os_buf);
+}
+
+static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size)
+{
+       struct sk_buff *skb;
+
+       skb = dev_alloc_skb(size + NET_IP_ALIGN);
+
+       if (skb)
+               skb_reserve(skb, NET_IP_ALIGN);
+
+       return skb;
+}
+
+static int enic_rq_alloc_buf(struct vnic_rq *rq)
+{
+       struct enic *enic = vnic_dev_priv(rq->vdev);
+       struct sk_buff *skb;
+       unsigned int len = enic->netdev->mtu + ETH_HLEN;
+       unsigned int os_buf_index = 0;
+       dma_addr_t dma_addr;
+
+       skb = enic_rq_alloc_skb(len);
+       if (!skb)
+               return -ENOMEM;
+
+       dma_addr = pci_map_single(enic->pdev, skb->data,
+               len, PCI_DMA_FROMDEVICE);
+
+       enic_queue_rq_desc(rq, skb, os_buf_index,
+               dma_addr, len);
+
+       return 0;
+}
+
+static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
+       void **tcph, u64 *hdr_flags, void *priv)
+{
+       struct cq_enet_rq_desc *cq_desc = priv;
+       unsigned int ip_len;
+       struct iphdr *iph;
+
+       u8 type, color, eop, sop, ingress_port, vlan_stripped;
+       u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
+       u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
+       u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
+       u8 packet_error;
+       u16 q_number, completed_index, bytes_written, vlan, checksum;
+       u32 rss_hash;
+
+       cq_enet_rq_desc_dec(cq_desc,
+               &type, &color, &q_number, &completed_index,
+               &ingress_port, &fcoe, &eop, &sop, &rss_type,
+               &csum_not_calc, &rss_hash, &bytes_written,
+               &packet_error, &vlan_stripped, &vlan, &checksum,
+               &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
+               &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
+               &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
+               &fcs_ok);
+
+       if (!(ipv4 && tcp && !ipv4_fragment))
+               return -1;
+
+       skb_reset_network_header(skb);
+       iph = ip_hdr(skb);
+
+       ip_len = ip_hdrlen(skb);
+       skb_set_transport_header(skb, ip_len);
+
+       /* check if ip header and tcp header are complete */
+       if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
+               return -1;
+
+       *hdr_flags = LRO_IPV4 | LRO_TCP;
+       *tcph = tcp_hdr(skb);
+       *iphdr = iph;
+
+       return 0;
+}
+
+static void enic_rq_indicate_buf(struct vnic_rq *rq,
+       struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
+       int skipped, void *opaque)
+{
+       struct enic *enic = vnic_dev_priv(rq->vdev);
+       struct sk_buff *skb;
+
+       u8 type, color, eop, sop, ingress_port, vlan_stripped;
+       u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
+       u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
+       u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
+       u8 packet_error;
+       u16 q_number, completed_index, bytes_written, vlan, checksum;
+       u32 rss_hash;
+
+       if (skipped)
+               return;
+
+       skb = buf->os_buf;
+       prefetch(skb->data - NET_IP_ALIGN);
+       pci_unmap_single(enic->pdev, buf->dma_addr,
+               buf->len, PCI_DMA_FROMDEVICE);
+
+       cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
+               &type, &color, &q_number, &completed_index,
+               &ingress_port, &fcoe, &eop, &sop, &rss_type,
+               &csum_not_calc, &rss_hash, &bytes_written,
+               &packet_error, &vlan_stripped, &vlan, &checksum,
+               &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
+               &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
+               &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
+               &fcs_ok);
+
+       if (packet_error) {
+
+               if (bytes_written > 0 && !fcs_ok) {
+                       if (net_ratelimit())
+                               printk(KERN_ERR PFX
+                                       "%s: packet error: bad FCS\n",
+                                       enic->netdev->name);
+               }
+
+               dev_kfree_skb_any(skb);
+
+               return;
+       }
+
+       if (eop && bytes_written > 0) {
+
+               /* Good receive
+                */
+
+               skb_put(skb, bytes_written);
+               skb->protocol = eth_type_trans(skb, enic->netdev);
+
+               if (enic->csum_rx_enabled && !csum_not_calc) {
+                       skb->csum = htons(checksum);
+                       skb->ip_summed = CHECKSUM_COMPLETE;
+               }
+
+               skb->dev = enic->netdev;
+               enic->netdev->last_rx = jiffies;
+
+               if (enic->vlan_group && vlan_stripped) {
+
+                       if (ENIC_SETTING(enic, LRO))
+                               lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
+                                       skb, enic->vlan_group,
+                                       vlan, cq_desc);
+                       else
+                               vlan_hwaccel_receive_skb(skb,
+                                       enic->vlan_group, vlan);
+
+               } else {
+
+                       if (ENIC_SETTING(enic, LRO))
+                               lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
+                       else
+                               netif_receive_skb(skb);
+
+               }
+
+       } else {
+
+               /* Buffer overflow
+                */
+
+               dev_kfree_skb_any(skb);
+       }
+}
+
+static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
+       u8 type, u16 q_number, u16 completed_index, void *opaque)
+{
+       struct enic *enic = vnic_dev_priv(vdev);
+
+       vnic_rq_service(&enic->rq[q_number], cq_desc,
+               completed_index, VNIC_RQ_RETURN_DESC,
+               enic_rq_indicate_buf, opaque);
+
+       return 0;
+}
+
+static void enic_rq_drop_buf(struct vnic_rq *rq,
+       struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
+       int skipped, void *opaque)
+{
+       struct enic *enic = vnic_dev_priv(rq->vdev);
+       struct sk_buff *skb = buf->os_buf;
+
+       if (skipped)
+               return;
+
+       pci_unmap_single(enic->pdev, buf->dma_addr,
+               buf->len, PCI_DMA_FROMDEVICE);
+
+       dev_kfree_skb_any(skb);
+}
+
+static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
+       u8 type, u16 q_number, u16 completed_index, void *opaque)
+{
+       struct enic *enic = vnic_dev_priv(vdev);
+
+       vnic_rq_service(&enic->rq[q_number], cq_desc,
+               completed_index, VNIC_RQ_RETURN_DESC,
+               enic_rq_drop_buf, opaque);
+
+       return 0;
+}
+
+static int enic_poll(struct napi_struct *napi, int budget)
+{
+       struct enic *enic = container_of(napi, struct enic, napi);
+       struct net_device *netdev = enic->netdev;
+       unsigned int rq_work_to_do = budget;
+       unsigned int wq_work_to_do = -1; /* no limit */
+       unsigned int  work_done, rq_work_done, wq_work_done;
+
+       /* Service RQ (first) and WQ
+        */
+
+       rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
+               rq_work_to_do, enic_rq_service, NULL);
+
+       wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
+               wq_work_to_do, enic_wq_service, NULL);
+
+       /* Accumulate intr event credits for this polling
+        * cycle.  An intr event is the completion of a
+        * a WQ or RQ packet.
+        */
+
+       work_done = rq_work_done + wq_work_done;
+
+       if (work_done > 0)
+               vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
+                       work_done,
+                       0 /* don't unmask intr */,
+                       0 /* don't reset intr timer */);
+
+       if (rq_work_done > 0) {
+
+               /* Replenish RQ
+                */
+
+               vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
+
+       } else {
+
+               /* If no work done, flush all LROs and exit polling
+                */
+
+               if (ENIC_SETTING(enic, LRO))
+                       lro_flush_all(&enic->lro_mgr);
+
+               netif_rx_complete(netdev, napi);
+               vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
+       }
+
+       return rq_work_done;
+}
+
+static int enic_poll_msix(struct napi_struct *napi, int budget)
+{
+       struct enic *enic = container_of(napi, struct enic, napi);
+       struct net_device *netdev = enic->netdev;
+       unsigned int work_to_do = budget;
+       unsigned int work_done;
+
+       /* Service RQ
+        */
+
+       work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
+               work_to_do, enic_rq_service, NULL);
+
+       if (work_done > 0) {
+
+               /* Replenish RQ
+                */
+
+               vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
+
+               /* Accumulate intr event credits for this polling
+                * cycle.  An intr event is the completion of a
+                * a WQ or RQ packet.
+                */
+
+               vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
+                       work_done,
+                       0 /* don't unmask intr */,
+                       0 /* don't reset intr timer */);
+       } else {
+
+               /* If no work done, flush all LROs and exit polling
+                */
+
+               if (ENIC_SETTING(enic, LRO))
+                       lro_flush_all(&enic->lro_mgr);
+
+               netif_rx_complete(netdev, napi);
+               vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
+       }
+
+       return work_done;
+}
+
+static void enic_notify_timer(unsigned long data)
+{
+       struct enic *enic = (struct enic *)data;
+
+       enic_notify_check(enic);
+
+       mod_timer(&enic->notify_timer, round_jiffies(ENIC_NOTIFY_TIMER_PERIOD));
+}
+
+static void enic_free_intr(struct enic *enic)
+{
+       struct net_device *netdev = enic->netdev;
+       unsigned int i;
+
+       switch (vnic_dev_get_intr_mode(enic->vdev)) {
+       case VNIC_DEV_INTR_MODE_INTX:
+       case VNIC_DEV_INTR_MODE_MSI:
+               free_irq(enic->pdev->irq, netdev);
+               break;
+       case VNIC_DEV_INTR_MODE_MSIX:
+               for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
+                       if (enic->msix[i].requested)
+                               free_irq(enic->msix_entry[i].vector,
+                                       enic->msix[i].devid);
+               break;
+       default:
+               break;
+       }
+}
+
+static int enic_request_intr(struct enic *enic)
+{
+       struct net_device *netdev = enic->netdev;
+       unsigned int i;
+       int err = 0;
+
+       switch (vnic_dev_get_intr_mode(enic->vdev)) {
+
+       case VNIC_DEV_INTR_MODE_INTX:
+
+               err = request_irq(enic->pdev->irq, enic_isr_legacy,
+                       IRQF_SHARED, netdev->name, netdev);
+               break;
+
+       case VNIC_DEV_INTR_MODE_MSI:
+
+               err = request_irq(enic->pdev->irq, enic_isr_msi,
+                       0, netdev->name, enic);
+               break;
+
+       case VNIC_DEV_INTR_MODE_MSIX:
+
+               sprintf(enic->msix[ENIC_MSIX_RQ].devname,
+                       "%.11s-rx", netdev->name);
+               enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
+               enic->msix[ENIC_MSIX_RQ].devid = enic;
+
+               sprintf(enic->msix[ENIC_MSIX_WQ].devname,
+                       "%.11s-tx", netdev->name);
+               enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
+               enic->msix[ENIC_MSIX_WQ].devid = enic;
+
+               sprintf(enic->msix[ENIC_MSIX_ERR].devname,
+                       "%.11s-err", netdev->name);
+               enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
+               enic->msix[ENIC_MSIX_ERR].devid = enic;
+
+               sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
+                       "%.11s-notify", netdev->name);
+               enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
+               enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
+
+               for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
+                       err = request_irq(enic->msix_entry[i].vector,
+                               enic->msix[i].isr, 0,
+                               enic->msix[i].devname,
+                               enic->msix[i].devid);
+                       if (err) {
+                               enic_free_intr(enic);
+                               break;
+                       }
+                       enic->msix[i].requested = 1;
+               }
+
+               break;
+
+       default:
+               break;
+       }
+
+       return err;
+}
+
+static int enic_notify_set(struct enic *enic)
+{
+       int err;
+
+       switch (vnic_dev_get_intr_mode(enic->vdev)) {
+       case VNIC_DEV_INTR_MODE_INTX:
+               err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
+               break;
+       case VNIC_DEV_INTR_MODE_MSIX:
+               err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
+               break;
+       default:
+               err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
+               break;
+       }
+
+       return err;
+}
+
+static void enic_notify_timer_start(struct enic *enic)
+{
+       switch (vnic_dev_get_intr_mode(enic->vdev)) {
+       case VNIC_DEV_INTR_MODE_MSI:
+               mod_timer(&enic->notify_timer, jiffies);
+               break;
+       default:
+               /* Using intr for notification for INTx/MSI-X */
+               break;
+       };
+}
+
+/* rtnl lock is held, process context */
+static int enic_open(struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       unsigned int i;
+       int err;
+
+       for (i = 0; i < enic->rq_count; i++) {
+               err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
+               if (err) {
+                       printk(KERN_ERR PFX
+                               "%s: Unable to alloc receive buffers.\n",
+                               netdev->name);
+                       return err;
+               }
+       }
+
+       for (i = 0; i < enic->wq_count; i++)
+               vnic_wq_enable(&enic->wq[i]);
+       for (i = 0; i < enic->rq_count; i++)
+               vnic_rq_enable(&enic->rq[i]);
+
+       enic_add_station_addr(enic);
+       enic_set_multicast_list(netdev);
+
+       netif_wake_queue(netdev);
+       napi_enable(&enic->napi);
+       vnic_dev_enable(enic->vdev);
+
+       for (i = 0; i < enic->intr_count; i++)
+               vnic_intr_unmask(&enic->intr[i]);
+
+       enic_notify_timer_start(enic);
+
+       return 0;
+}
+
+/* rtnl lock is held, process context */
+static int enic_stop(struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       unsigned int i;
+       int err;
+
+       del_timer_sync(&enic->notify_timer);
+
+       vnic_dev_disable(enic->vdev);
+       napi_disable(&enic->napi);
+       netif_stop_queue(netdev);
+
+       for (i = 0; i < enic->intr_count; i++)
+               vnic_intr_mask(&enic->intr[i]);
+
+       for (i = 0; i < enic->wq_count; i++) {
+               err = vnic_wq_disable(&enic->wq[i]);
+               if (err)
+                       return err;
+       }
+       for (i = 0; i < enic->rq_count; i++) {
+               err = vnic_rq_disable(&enic->rq[i]);
+               if (err)
+                       return err;
+       }
+
+       (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
+               -1, enic_rq_service_drop, NULL);
+       (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
+               -1, enic_wq_service, NULL);
+
+       for (i = 0; i < enic->wq_count; i++)
+               vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
+       for (i = 0; i < enic->rq_count; i++)
+               vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
+       for (i = 0; i < enic->cq_count; i++)
+               vnic_cq_clean(&enic->cq[i]);
+       for (i = 0; i < enic->intr_count; i++)
+               vnic_intr_clean(&enic->intr[i]);
+
+       return 0;
+}
+
+static int enic_change_mtu(struct net_device *netdev, int new_mtu)
+{
+       struct enic *enic = netdev_priv(netdev);
+       int running = netif_running(netdev);
+
+       if (running)
+               enic_stop(netdev);
+
+       if (new_mtu < ENIC_MIN_MTU)
+               new_mtu = ENIC_MIN_MTU;
+       if (new_mtu > ENIC_MAX_MTU)
+               new_mtu = ENIC_MAX_MTU;
+
+       netdev->mtu = new_mtu;
+
+       if (netdev->mtu > enic->port_mtu)
+               printk(KERN_WARNING PFX
+                       "%s: interface MTU (%d) set higher "
+                       "than port MTU (%d)\n",
+                       netdev->name, netdev->mtu, enic->port_mtu);
+
+       if (running)
+               enic_open(netdev);
+
+       return 0;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void enic_poll_controller(struct net_device *netdev)
+{
+       struct enic *enic = netdev_priv(netdev);
+       struct vnic_dev *vdev = enic->vdev;
+
+       switch (vnic_dev_get_intr_mode(vdev)) {
+       case VNIC_DEV_INTR_MODE_MSIX:
+               enic_isr_msix_rq(enic->pdev->irq, enic);
+               enic_isr_msix_wq(enic->pdev->irq, enic);
+               break;
+       case VNIC_DEV_INTR_MODE_MSI:
+               enic_isr_msi(enic->pdev->irq, enic);
+               break;
+       case VNIC_DEV_INTR_MODE_INTX:
+               enic_isr_legacy(enic->pdev->irq, netdev);
+               break;
+       default:
+               break;
+       }
+}
+#endif
+
+static int enic_dev_wait(struct vnic_dev *vdev,
+       int (*start)(struct vnic_dev *, int),
+       int (*finished)(struct vnic_dev *, int *),
+       int arg)
+{
+       unsigned long time;
+       int done;
+       int err;
+
+       BUG_ON(in_interrupt());
+
+       err = start(vdev, arg);
+       if (err)
+               return err;
+
+       /* Wait for func to complete...2 seconds max
+        */
+
+       time = jiffies + (HZ * 2);
+       do {
+
+               err = finished(vdev, &done);
+               if (err)
+                       return err;
+
+               if (done)
+                       return 0;
+
+               schedule_timeout_uninterruptible(HZ / 10);
+
+       } while (time_after(time, jiffies));
+
+       return -ETIMEDOUT;
+}
+
+static int enic_dev_open(struct enic *enic)
+{
+       int err;
+
+       err = enic_dev_wait(enic->vdev, vnic_dev_open,
+               vnic_dev_open_done, 0);
+       if (err)
+               printk(KERN_ERR PFX
+                       "vNIC device open failed, err %d.\n", err);
+
+       return err;
+}
+
+static int enic_dev_soft_reset(struct enic *enic)
+{
+       int err;
+
+       err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
+               vnic_dev_soft_reset_done, 0);
+       if (err)
+               printk(KERN_ERR PFX
+                       "vNIC soft reset failed, err %d.\n", err);
+
+       return err;
+}
+
+static void enic_reset(struct work_struct *work)
+{
+       struct enic *enic = container_of(work, struct enic, reset);
+
+       if (!netif_running(enic->netdev))
+               return;
+
+       rtnl_lock();
+
+       spin_lock(&enic->devcmd_lock);
+       vnic_dev_hang_notify(enic->vdev);
+       spin_unlock(&enic->devcmd_lock);
+
+       enic_stop(enic->netdev);
+       enic_dev_soft_reset(enic);
+       enic_reset_mcaddrs(enic);
+       enic_init_vnic_resources(enic);
+       enic_open(enic->netdev);
+
+       rtnl_unlock();
+}
+
+static int enic_set_intr_mode(struct enic *enic)
+{
+       unsigned int n = ARRAY_SIZE(enic->rq);
+       unsigned int m = ARRAY_SIZE(enic->wq);
+       unsigned int i;
+
+       /* Set interrupt mode (INTx, MSI, MSI-X) depending
+        * system capabilities.
+        *
+        * Try MSI-X first
+        *
+        * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
+        * (the second to last INTR is used for WQ/RQ errors)
+        * (the last INTR is used for notifications)
+        */
+
+       BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
+       for (i = 0; i < n + m + 2; i++)
+               enic->msix_entry[i].entry = i;
+
+       if (enic->config.intr_mode < 1 &&
+           enic->rq_count >= n &&
+           enic->wq_count >= m &&
+           enic->cq_count >= n + m &&
+           enic->intr_count >= n + m + 2 &&
+           !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
+
+               enic->rq_count = n;
+               enic->wq_count = m;
+               enic->cq_count = n + m;
+               enic->intr_count = n + m + 2;
+
+               vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
+
+               return 0;
+       }
+
+       /* Next try MSI
+        *
+        * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
+        */
+
+       if (enic->config.intr_mode < 2 &&
+           enic->rq_count >= 1 &&
+           enic->wq_count >= 1 &&
+           enic->cq_count >= 2 &&
+           enic->intr_count >= 1 &&
+           !pci_enable_msi(enic->pdev)) {
+
+               enic->rq_count = 1;
+               enic->wq_count = 1;
+               enic->cq_count = 2;
+               enic->intr_count = 1;
+
+               vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
+
+               return 0;
+       }
+
+       /* Next try INTx
+        *
+        * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
+        * (the first INTR is used for WQ/RQ)
+        * (the second INTR is used for WQ/RQ errors)
+        * (the last INTR is used for notifications)
+        */
+
+       if (enic->config.intr_mode < 3 &&
+           enic->rq_count >= 1 &&
+           enic->wq_count >= 1 &&
+           enic->cq_count >= 2 &&
+           enic->intr_count >= 3) {
+
+               enic->rq_count = 1;
+               enic->wq_count = 1;
+               enic->cq_count = 2;
+               enic->intr_count = 3;
+
+               vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
+
+               return 0;
+       }
+
+       vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
+
+       return -EINVAL;
+}
+
+static void enic_clear_intr_mode(struct enic *enic)
+{
+       switch (vnic_dev_get_intr_mode(enic->vdev)) {
+       case VNIC_DEV_INTR_MODE_MSIX:
+               pci_disable_msix(enic->pdev);
+               break;
+       case VNIC_DEV_INTR_MODE_MSI:
+               pci_disable_msi(enic->pdev);
+               break;
+       default:
+               break;
+       }
+
+       vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
+}
+
+static void enic_iounmap(struct enic *enic)
+{
+       if (enic->bar0.vaddr)
+               iounmap(enic->bar0.vaddr);
+}
+
+static int __devinit enic_probe(struct pci_dev *pdev,
+       const struct pci_device_id *ent)
+{
+       struct net_device *netdev;
+       struct enic *enic;
+       int using_dac = 0;
+       unsigned int i;
+       int err;
+
+       const u8 rss_default_cpu = 0;
+       const u8 rss_hash_type = 0;
+       const u8 rss_hash_bits = 0;
+       const u8 rss_base_cpu = 0;
+       const u8 rss_enable = 0;
+       const u8 tso_ipid_split_en = 0;
+       const u8 ig_vlan_strip_en = 1;
+
+       /* Allocate net device structure and initialize.  Private
+        * instance data is initialized to zero.
+        */
+
+       netdev = alloc_etherdev(sizeof(struct enic));
+       if (!netdev) {
+               printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
+               return -ENOMEM;
+       }
+
+       /* Set the netdev name early so intr vectors are properly
+        * named and any error msgs can include netdev->name
+        */
+
+       rtnl_lock();
+       err = dev_alloc_name(netdev, netdev->name);
+       rtnl_unlock();
+       if (err < 0) {
+               printk(KERN_ERR PFX "Unable to allocate netdev name.\n");
+               goto err_out_free_netdev;
+       }
+
+       pci_set_drvdata(pdev, netdev);
+
+       SET_NETDEV_DEV(netdev, &pdev->dev);
+
+       enic = netdev_priv(netdev);
+       enic->netdev = netdev;
+       enic->pdev = pdev;
+
+       /* Setup PCI resources
+        */
+
+       err = pci_enable_device(pdev);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Cannot enable PCI device, aborting.\n",
+                       netdev->name);
+               goto err_out_free_netdev;
+       }
+
+       err = pci_request_regions(pdev, DRV_NAME);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Cannot request PCI regions, aborting.\n",
+                       netdev->name);
+               goto err_out_disable_device;
+       }
+
+       pci_set_master(pdev);
+
+       /* Query PCI controller on system for DMA addressing
+        * limitation for the device.  Try 40-bit first, and
+        * fail to 32-bit.
+        */
+
+       err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
+       if (err) {
+               err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+               if (err) {
+                       printk(KERN_ERR PFX
+                               "%s: No usable DMA configuration, aborting.\n",
+                               netdev->name);
+                       goto err_out_release_regions;
+               }
+               err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
+               if (err) {
+                       printk(KERN_ERR PFX
+                               "%s: Unable to obtain 32-bit DMA "
+                               "for consistent allocations, aborting.\n",
+                               netdev->name);
+                       goto err_out_release_regions;
+               }
+       } else {
+               err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
+               if (err) {
+                       printk(KERN_ERR PFX
+                               "%s: Unable to obtain 40-bit DMA "
+                               "for consistent allocations, aborting.\n",
+                               netdev->name);
+                       goto err_out_release_regions;
+               }
+               using_dac = 1;
+       }
+
+       /* Map vNIC resources from BAR0
+        */
+
+       if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
+               printk(KERN_ERR PFX
+                       "%s: BAR0 not memory-map'able, aborting.\n",
+                       netdev->name);
+               err = -ENODEV;
+               goto err_out_release_regions;
+       }
+
+       enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len);
+       enic->bar0.bus_addr = pci_resource_start(pdev, 0);
+       enic->bar0.len = pci_resource_len(pdev, 0);
+
+       if (!enic->bar0.vaddr) {
+               printk(KERN_ERR PFX
+                       "%s: Cannot memory-map BAR0 res hdr, aborting.\n",
+                       netdev->name);
+               err = -ENODEV;
+               goto err_out_release_regions;
+       }
+
+       /* Register vNIC device
+        */
+
+       enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
+       if (!enic->vdev) {
+               printk(KERN_ERR PFX
+                       "%s: vNIC registration failed, aborting.\n",
+                       netdev->name);
+               err = -ENODEV;
+               goto err_out_iounmap;
+       }
+
+       /* Issue device open to get device in known state
+        */
+
+       err = enic_dev_open(enic);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: vNIC dev open failed, aborting.\n",
+                       netdev->name);
+               goto err_out_vnic_unregister;
+       }
+
+       /* Issue device init to initialize the vnic-to-switch link.
+        * We'll start with carrier off and wait for link UP
+        * notification later to turn on carrier.  We don't need
+        * to wait here for the vnic-to-switch link initialization
+        * to complete; link UP notification is the indication that
+        * the process is complete.
+        */
+
+       netif_carrier_off(netdev);
+
+       err = vnic_dev_init(enic->vdev, 0);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: vNIC dev init failed, aborting.\n",
+                       netdev->name);
+               goto err_out_dev_close;
+       }
+
+       /* Get vNIC configuration
+        */
+
+       err = enic_get_vnic_config(enic);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Get vNIC configuration failed, aborting.\n",
+                       netdev->name);
+               goto err_out_dev_close;
+       }
+
+       /* Get available resource counts
+       */
+
+       enic_get_res_counts(enic);
+
+       /* Set interrupt mode based on resource counts and system
+        * capabilities
+       */
+
+       err = enic_set_intr_mode(enic);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Failed to set intr mode, aborting.\n",
+                       netdev->name);
+               goto err_out_dev_close;
+       }
+
+       /* Request interrupt vector(s)
+       */
+
+       err = enic_request_intr(enic);
+       if (err) {
+               printk(KERN_ERR PFX "%s: Unable to request irq.\n",
+                       netdev->name);
+               goto err_out_dev_close;
+       }
+
+       /* Allocate and configure vNIC resources
+        */
+
+       err = enic_alloc_vnic_resources(enic);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Failed to alloc vNIC resources, aborting.\n",
+                       netdev->name);
+               goto err_out_free_vnic_resources;
+       }
+
+       enic_init_vnic_resources(enic);
+
+       /* Enable VLAN tag stripping.  RSS not enabled (yet).
+        */
+
+       err = enic_set_nic_cfg(enic,
+               rss_default_cpu, rss_hash_type,
+               rss_hash_bits, rss_base_cpu,
+               rss_enable, tso_ipid_split_en,
+               ig_vlan_strip_en);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Failed to config nic, aborting.\n",
+                       netdev->name);
+               goto err_out_free_vnic_resources;
+       }
+
+       /* Setup notification buffer area
+        */
+
+       err = enic_notify_set(enic);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Failed to alloc notify buffer, aborting.\n",
+                       netdev->name);
+               goto err_out_free_vnic_resources;
+       }
+
+       /* Setup notification timer, HW reset task, and locks
+        */
+
+       init_timer(&enic->notify_timer);
+       enic->notify_timer.function = enic_notify_timer;
+       enic->notify_timer.data = (unsigned long)enic;
+
+       INIT_WORK(&enic->reset, enic_reset);
+
+       for (i = 0; i < enic->wq_count; i++)
+               spin_lock_init(&enic->wq_lock[i]);
+
+       spin_lock_init(&enic->devcmd_lock);
+
+       /* Register net device
+        */
+
+       enic->port_mtu = enic->config.mtu;
+       (void)enic_change_mtu(netdev, enic->port_mtu);
+
+       err = enic_set_mac_addr(netdev, enic->mac_addr);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Invalid MAC address, aborting.\n",
+                       netdev->name);
+               goto err_out_notify_unset;
+       }
+
+       netdev->open = enic_open;
+       netdev->stop = enic_stop;
+       netdev->hard_start_xmit = enic_hard_start_xmit;
+       netdev->get_stats = enic_get_stats;
+       netdev->set_multicast_list = enic_set_multicast_list;
+       netdev->change_mtu = enic_change_mtu;
+       netdev->vlan_rx_register = enic_vlan_rx_register;
+       netdev->vlan_rx_add_vid = enic_vlan_rx_add_vid;
+       netdev->vlan_rx_kill_vid = enic_vlan_rx_kill_vid;
+       netdev->tx_timeout = enic_tx_timeout;
+       netdev->watchdog_timeo = 2 * HZ;
+       netdev->ethtool_ops = &enic_ethtool_ops;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+       netdev->poll_controller = enic_poll_controller;
+#endif
+
+       switch (vnic_dev_get_intr_mode(enic->vdev)) {
+       default:
+               netif_napi_add(netdev, &enic->napi, enic_poll, 64);
+               break;
+       case VNIC_DEV_INTR_MODE_MSIX:
+               netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
+               break;
+       }
+
+       netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
+       if (ENIC_SETTING(enic, TXCSUM))
+               netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
+       if (ENIC_SETTING(enic, TSO))
+               netdev->features |= NETIF_F_TSO |
+                       NETIF_F_TSO6 | NETIF_F_TSO_ECN;
+       if (using_dac)
+               netdev->features |= NETIF_F_HIGHDMA;
+
+
+       enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
+
+       if (ENIC_SETTING(enic, LRO)) {
+               enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
+               enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
+               enic->lro_mgr.lro_arr = enic->lro_desc;
+               enic->lro_mgr.get_skb_header = enic_get_skb_header;
+               enic->lro_mgr.features  = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
+               enic->lro_mgr.dev = netdev;
+               enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
+               enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
+       }
+
+       err = register_netdev(netdev);
+       if (err) {
+               printk(KERN_ERR PFX
+                       "%s: Cannot register net device, aborting.\n",
+                       netdev->name);
+               goto err_out_notify_unset;
+       }
+
+       return 0;
+
+err_out_notify_unset:
+       vnic_dev_notify_unset(enic->vdev);
+err_out_free_vnic_resources:
+       enic_free_vnic_resources(enic);
+       enic_free_intr(enic);
+err_out_dev_close:
+       vnic_dev_close(enic->vdev);
+err_out_vnic_unregister:
+       enic_clear_intr_mode(enic);
+       vnic_dev_unregister(enic->vdev);
+err_out_iounmap:
+       enic_iounmap(enic);
+err_out_release_regions:
+       pci_release_regions(pdev);
+err_out_disable_device:
+       pci_disable_device(pdev);
+err_out_free_netdev:
+       pci_set_drvdata(pdev, NULL);
+       free_netdev(netdev);
+
+       return err;
+}
+
+static void __devexit enic_remove(struct pci_dev *pdev)
+{
+       struct net_device *netdev = pci_get_drvdata(pdev);
+
+       if (netdev) {
+               struct enic *enic = netdev_priv(netdev);
+
+               flush_scheduled_work();
+               unregister_netdev(netdev);
+               vnic_dev_notify_unset(enic->vdev);
+               enic_free_vnic_resources(enic);
+               enic_free_intr(enic);
+               vnic_dev_close(enic->vdev);
+               enic_clear_intr_mode(enic);
+               vnic_dev_unregister(enic->vdev);
+               enic_iounmap(enic);
+               pci_release_regions(pdev);
+               pci_disable_device(pdev);
+               pci_set_drvdata(pdev, NULL);
+               free_netdev(netdev);
+       }
+}
+
+static struct pci_driver enic_driver = {
+       .name = DRV_NAME,
+       .id_table = enic_id_table,
+       .probe = enic_probe,
+       .remove = __devexit_p(enic_remove),
+};
+
+static int __init enic_init_module(void)
+{
+       printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
+
+       return pci_register_driver(&enic_driver);
+}
+
+static void __exit enic_cleanup_module(void)
+{
+       pci_unregister_driver(&enic_driver);
+}
+
+module_init(enic_init_module);
+module_exit(enic_cleanup_module);
diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c
new file mode 100644 (file)
index 0000000..95184b9
--- /dev/null
@@ -0,0 +1,370 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+
+#include "wq_enet_desc.h"
+#include "rq_enet_desc.h"
+#include "cq_enet_desc.h"
+#include "vnic_resource.h"
+#include "vnic_enet.h"
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "vnic_cq.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "vnic_nic.h"
+#include "vnic_rss.h"
+#include "enic_res.h"
+#include "enic.h"
+
+int enic_get_vnic_config(struct enic *enic)
+{
+       struct vnic_enet_config *c = &enic->config;
+       int err;
+
+       err = vnic_dev_mac_addr(enic->vdev, enic->mac_addr);
+       if (err) {
+               printk(KERN_ERR PFX "Error getting MAC addr, %d\n", err);
+               return err;
+       }
+
+#define GET_CONFIG(m) \
+       do { \
+               err = vnic_dev_spec(enic->vdev, \
+                       offsetof(struct vnic_enet_config, m), \
+                       sizeof(c->m), &c->m); \
+               if (err) { \
+                       printk(KERN_ERR PFX \
+                               "Error getting %s, %d\n", #m, err); \
+                       return err; \
+               } \
+       } while (0)
+
+       GET_CONFIG(flags);
+       GET_CONFIG(wq_desc_count);
+       GET_CONFIG(rq_desc_count);
+       GET_CONFIG(mtu);
+       GET_CONFIG(intr_timer);
+       GET_CONFIG(intr_timer_type);
+       GET_CONFIG(intr_mode);
+
+       c->wq_desc_count =
+               min_t(u32, ENIC_MAX_WQ_DESCS,
+               max_t(u32, ENIC_MIN_WQ_DESCS,
+               c->wq_desc_count));
+       c->wq_desc_count &= 0xfffffff0; /* must be aligned to groups of 16 */
+
+       c->rq_desc_count =
+               min_t(u32, ENIC_MAX_RQ_DESCS,
+               max_t(u32, ENIC_MIN_RQ_DESCS,
+               c->rq_desc_count));
+       c->rq_desc_count &= 0xfffffff0; /* must be aligned to groups of 16 */
+
+       if (c->mtu == 0)
+               c->mtu = 1500;
+       c->mtu = min_t(u16, ENIC_MAX_MTU,
+               max_t(u16, ENIC_MIN_MTU,
+               c->mtu));
+
+       c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
+
+       printk(KERN_INFO PFX "vNIC MAC addr %02x:%02x:%02x:%02x:%02x:%02x "
+               "wq/rq %d/%d\n",
+               enic->mac_addr[0], enic->mac_addr[1], enic->mac_addr[2],
+               enic->mac_addr[3], enic->mac_addr[4], enic->mac_addr[5],
+               c->wq_desc_count, c->rq_desc_count);
+       printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
+               "intr timer %d\n",
+               c->mtu, ENIC_SETTING(enic, TXCSUM),
+               ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
+               ENIC_SETTING(enic, LRO), c->intr_timer);
+
+       return 0;
+}
+
+void enic_add_station_addr(struct enic *enic)
+{
+       vnic_dev_add_addr(enic->vdev, enic->mac_addr);
+}
+
+void enic_add_multicast_addr(struct enic *enic, u8 *addr)
+{
+       vnic_dev_add_addr(enic->vdev, addr);
+}
+
+void enic_del_multicast_addr(struct enic *enic, u8 *addr)
+{
+       vnic_dev_del_addr(enic->vdev, addr);
+}
+
+void enic_add_vlan(struct enic *enic, u16 vlanid)
+{
+       u64 a0 = vlanid, a1 = 0;
+       int wait = 1000;
+       int err;
+
+       err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
+       if (err)
+               printk(KERN_ERR PFX "Can't add vlan id, %d\n", err);
+}
+
+void enic_del_vlan(struct enic *enic, u16 vlanid)
+{
+       u64 a0 = vlanid, a1 = 0;
+       int wait = 1000;
+       int err;
+
+       err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
+       if (err)
+               printk(KERN_ERR PFX "Can't delete vlan id, %d\n", err);
+}
+
+int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
+       u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
+       u8 ig_vlan_strip_en)
+{
+       u64 a0, a1;
+       u32 nic_cfg;
+       int wait = 1000;
+
+       vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
+               rss_hash_type, rss_hash_bits, rss_base_cpu,
+               rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
+
+       a0 = nic_cfg;
+       a1 = 0;
+
+       return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
+}
+
+void enic_free_vnic_resources(struct enic *enic)
+{
+       unsigned int i;
+
+       for (i = 0; i < enic->wq_count; i++)
+               vnic_wq_free(&enic->wq[i]);
+       for (i = 0; i < enic->rq_count; i++)
+               vnic_rq_free(&enic->rq[i]);
+       for (i = 0; i < enic->cq_count; i++)
+               vnic_cq_free(&enic->cq[i]);
+       for (i = 0; i < enic->intr_count; i++)
+               vnic_intr_free(&enic->intr[i]);
+}
+
+void enic_get_res_counts(struct enic *enic)
+{
+       enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
+       enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
+       enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
+       enic->intr_count = vnic_dev_get_res_count(enic->vdev,
+               RES_TYPE_INTR_CTRL);
+
+       printk(KERN_INFO PFX "vNIC resources avail: "
+               "wq %d rq %d cq %d intr %d\n",
+               enic->wq_count, enic->rq_count,
+               enic->cq_count, enic->intr_count);
+}
+
+void enic_init_vnic_resources(struct enic *enic)
+{
+       enum vnic_dev_intr_mode intr_mode;
+       unsigned int mask_on_assertion;
+       unsigned int interrupt_offset;
+       unsigned int error_interrupt_enable;
+       unsigned int error_interrupt_offset;
+       unsigned int cq_index;
+       unsigned int i;
+
+       intr_mode = vnic_dev_get_intr_mode(enic->vdev);
+
+       /* Init RQ/WQ resources.
+        *
+        * RQ[0 - n-1] point to CQ[0 - n-1]
+        * WQ[0 - m-1] point to CQ[n - n+m-1]
+        *
+        * Error interrupt is not enabled for MSI.
+        */
+
+       switch (intr_mode) {
+       case VNIC_DEV_INTR_MODE_INTX:
+       case VNIC_DEV_INTR_MODE_MSIX:
+               error_interrupt_enable = 1;
+               error_interrupt_offset = enic->intr_count - 2;
+               break;
+       default:
+               error_interrupt_enable = 0;
+               error_interrupt_offset = 0;
+               break;
+       }
+
+       for (i = 0; i < enic->rq_count; i++) {
+               cq_index = i;
+               vnic_rq_init(&enic->rq[i],
+                       cq_index,
+                       error_interrupt_enable,
+                       error_interrupt_offset);
+       }
+
+       for (i = 0; i < enic->wq_count; i++) {
+               cq_index = enic->rq_count + i;
+               vnic_wq_init(&enic->wq[i],
+                       cq_index,
+                       error_interrupt_enable,
+                       error_interrupt_offset);
+       }
+
+       /* Init CQ resources
+        *
+        * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
+        * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
+        */
+
+       for (i = 0; i < enic->cq_count; i++) {
+
+               switch (intr_mode) {
+               case VNIC_DEV_INTR_MODE_MSIX:
+                       interrupt_offset = i;
+                       break;
+               default:
+                       interrupt_offset = 0;
+                       break;
+               }
+
+               vnic_cq_init(&enic->cq[i],
+                       0 /* flow_control_enable */,
+                       1 /* color_enable */,
+                       0 /* cq_head */,
+                       0 /* cq_tail */,
+                       1 /* cq_tail_color */,
+                       1 /* interrupt_enable */,
+                       1 /* cq_entry_enable */,
+                       0 /* cq_message_enable */,
+                       interrupt_offset,
+                       0 /* cq_message_addr */);
+       }
+
+       /* Init INTR resources
+        *
+        * mask_on_assertion is not used for INTx due to the level-
+        * triggered nature of INTx
+        */
+
+       switch (intr_mode) {
+       case VNIC_DEV_INTR_MODE_MSI:
+       case VNIC_DEV_INTR_MODE_MSIX:
+               mask_on_assertion = 1;
+               break;
+       default:
+               mask_on_assertion = 0;
+               break;
+       }
+
+       for (i = 0; i < enic->intr_count; i++) {
+               vnic_intr_init(&enic->intr[i],
+                       enic->config.intr_timer,
+                       enic->config.intr_timer_type,
+                       mask_on_assertion);
+       }
+
+       /* Clear LIF stats
+        */
+
+       vnic_dev_stats_clear(enic->vdev);
+}
+
+int enic_alloc_vnic_resources(struct enic *enic)
+{
+       enum vnic_dev_intr_mode intr_mode;
+       unsigned int i;
+       int err;
+
+       intr_mode = vnic_dev_get_intr_mode(enic->vdev);
+
+       printk(KERN_INFO PFX "vNIC resources used:  "
+               "wq %d rq %d cq %d intr %d intr mode %s\n",
+               enic->wq_count, enic->rq_count,
+               enic->cq_count, enic->intr_count,
+               intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
+               intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
+               intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
+               "unknown"
+               );
+
+       /* Allocate queue resources
+        */
+
+       for (i = 0; i < enic->wq_count; i++) {
+               err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
+                       enic->config.wq_desc_count,
+                       sizeof(struct wq_enet_desc));
+               if (err)
+                       goto err_out_cleanup;
+       }
+
+       for (i = 0; i < enic->rq_count; i++) {
+               err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
+                       enic->config.rq_desc_count,
+                       sizeof(struct rq_enet_desc));
+               if (err)
+                       goto err_out_cleanup;
+       }
+
+       for (i = 0; i < enic->cq_count; i++) {
+               if (i < enic->rq_count)
+                       err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
+                               enic->config.rq_desc_count,
+                               sizeof(struct cq_enet_rq_desc));
+               else
+                       err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
+                               enic->config.wq_desc_count,
+                               sizeof(struct cq_enet_wq_desc));
+               if (err)
+                       goto err_out_cleanup;
+       }
+
+       for (i = 0; i < enic->intr_count; i++) {
+               err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
+               if (err)
+                       goto err_out_cleanup;
+       }
+
+       /* Hook remaining resource
+        */
+
+       enic->legacy_pba = vnic_dev_get_res(enic->vdev,
+               RES_TYPE_INTR_PBA_LEGACY, 0);
+       if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
+               printk(KERN_ERR PFX "Failed to hook legacy pba resource\n");
+               err = -ENODEV;
+               goto err_out_cleanup;
+       }
+
+       return 0;
+
+err_out_cleanup:
+       enic_free_vnic_resources(enic);
+
+       return err;
+}
diff --git a/drivers/net/enic/enic_res.h b/drivers/net/enic/enic_res.h
new file mode 100644 (file)
index 0000000..68534a2
--- /dev/null
@@ -0,0 +1,151 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _ENIC_RES_H_
+#define _ENIC_RES_H_
+
+#include "wq_enet_desc.h"
+#include "rq_enet_desc.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+
+#define ENIC_MIN_WQ_DESCS              64
+#define ENIC_MAX_WQ_DESCS              4096
+#define ENIC_MIN_RQ_DESCS              64
+#define ENIC_MAX_RQ_DESCS              4096
+
+#define ENIC_MIN_MTU                   576  /* minimum for IPv4 */
+#define ENIC_MAX_MTU                   9000
+
+#define ENIC_MULTICAST_PERFECT_FILTERS 32
+
+#define ENIC_NON_TSO_MAX_DESC          16
+
+#define ENIC_SETTING(enic, f) ((enic->config.flags & VENETF_##f) ? 1 : 0)
+
+static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq,
+       void *os_buf, dma_addr_t dma_addr, unsigned int len,
+       unsigned int mss_or_csum_offset, unsigned int hdr_len,
+       int vlan_tag_insert, unsigned int vlan_tag,
+       int offload_mode, int cq_entry, int sop, int eop)
+{
+       struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
+
+       wq_enet_desc_enc(desc,
+               (u64)dma_addr | VNIC_PADDR_TARGET,
+               (u16)len,
+               (u16)mss_or_csum_offset,
+               (u16)hdr_len, (u8)offload_mode,
+               (u8)eop, (u8)cq_entry,
+               0, /* fcoe_encap */
+               (u8)vlan_tag_insert,
+               (u16)vlan_tag,
+               0 /* loopback */);
+
+       wmb();
+
+       vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop);
+}
+
+static inline void enic_queue_wq_desc_cont(struct vnic_wq *wq,
+       void *os_buf, dma_addr_t dma_addr, unsigned int len, int eop)
+{
+       enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
+               0, 0, 0, 0, 0,
+               eop, 0 /* !SOP */, eop);
+}
+
+static inline void enic_queue_wq_desc(struct vnic_wq *wq, void *os_buf,
+       dma_addr_t dma_addr, unsigned int len, int vlan_tag_insert,
+       unsigned int vlan_tag, int eop)
+{
+       enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
+               0, 0, vlan_tag_insert, vlan_tag,
+               WQ_ENET_OFFLOAD_MODE_CSUM,
+               eop, 1 /* SOP */, eop);
+}
+
+static inline void enic_queue_wq_desc_csum(struct vnic_wq *wq,
+       void *os_buf, dma_addr_t dma_addr, unsigned int len,
+       int ip_csum, int tcpudp_csum, int vlan_tag_insert,
+       unsigned int vlan_tag, int eop)
+{
+       enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
+               (ip_csum ? 1 : 0) + (tcpudp_csum ? 2 : 0),
+               0, vlan_tag_insert, vlan_tag,
+               WQ_ENET_OFFLOAD_MODE_CSUM,
+               eop, 1 /* SOP */, eop);
+}
+
+static inline void enic_queue_wq_desc_csum_l4(struct vnic_wq *wq,
+       void *os_buf, dma_addr_t dma_addr, unsigned int len,
+       unsigned int csum_offset, unsigned int hdr_len,
+       int vlan_tag_insert, unsigned int vlan_tag, int eop)
+{
+       enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
+               csum_offset, hdr_len, vlan_tag_insert, vlan_tag,
+               WQ_ENET_OFFLOAD_MODE_CSUM_L4,
+               eop, 1 /* SOP */, eop);
+}
+
+static inline void enic_queue_wq_desc_tso(struct vnic_wq *wq,
+       void *os_buf, dma_addr_t dma_addr, unsigned int len,
+       unsigned int mss, unsigned int hdr_len, int vlan_tag_insert,
+       unsigned int vlan_tag, int eop)
+{
+       enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
+               mss, hdr_len, vlan_tag_insert, vlan_tag,
+               WQ_ENET_OFFLOAD_MODE_TSO,
+               eop, 1 /* SOP */, eop);
+}
+
+static inline void enic_queue_rq_desc(struct vnic_rq *rq,
+       void *os_buf, unsigned int os_buf_index,
+       dma_addr_t dma_addr, unsigned int len)
+{
+       struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
+       u8 type = os_buf_index ?
+               RQ_ENET_TYPE_NOT_SOP : RQ_ENET_TYPE_ONLY_SOP;
+
+       rq_enet_desc_enc(desc,
+               (u64)dma_addr | VNIC_PADDR_TARGET,
+               type, (u16)len);
+
+       wmb();
+
+       vnic_rq_post(rq, os_buf, os_buf_index, dma_addr, len);
+}
+
+struct enic;
+
+int enic_get_vnic_config(struct enic *);
+void enic_add_station_addr(struct enic *enic);
+void enic_add_multicast_addr(struct enic *enic, u8 *addr);
+void enic_del_multicast_addr(struct enic *enic, u8 *addr);
+void enic_add_vlan(struct enic *enic, u16 vlanid);
+void enic_del_vlan(struct enic *enic, u16 vlanid);
+int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
+       u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
+       u8 ig_vlan_strip_en);
+void enic_get_res_counts(struct enic *enic);
+void enic_init_vnic_resources(struct enic *enic);
+int enic_alloc_vnic_resources(struct enic *);
+void enic_free_vnic_resources(struct enic *);
+
+#endif /* _ENIC_RES_H_ */
diff --git a/drivers/net/enic/rq_enet_desc.h b/drivers/net/enic/rq_enet_desc.h
new file mode 100644 (file)
index 0000000..a06e649
--- /dev/null
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _RQ_ENET_DESC_H_
+#define _RQ_ENET_DESC_H_
+
+/* Ethernet receive queue descriptor: 16B */
+struct rq_enet_desc {
+       __le64 address;
+       __le16 length_type;
+       u8 reserved[6];
+};
+
+enum rq_enet_type_types {
+       RQ_ENET_TYPE_ONLY_SOP = 0,
+       RQ_ENET_TYPE_NOT_SOP = 1,
+       RQ_ENET_TYPE_RESV2 = 2,
+       RQ_ENET_TYPE_RESV3 = 3,
+};
+
+#define RQ_ENET_ADDR_BITS              64
+#define RQ_ENET_LEN_BITS               14
+#define RQ_ENET_LEN_MASK               ((1 << RQ_ENET_LEN_BITS) - 1)
+#define RQ_ENET_TYPE_BITS              2
+#define RQ_ENET_TYPE_MASK              ((1 << RQ_ENET_TYPE_BITS) - 1)
+
+static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
+       u64 address, u8 type, u16 length)
+{
+       desc->address = cpu_to_le64(address);
+       desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
+               ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
+}
+
+static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
+       u64 *address, u8 *type, u16 *length)
+{
+       *address = le64_to_cpu(desc->address);
+       *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
+       *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
+               RQ_ENET_TYPE_MASK);
+}
+
+#endif /* _RQ_ENET_DESC_H_ */
diff --git a/drivers/net/enic/vnic_cq.c b/drivers/net/enic/vnic_cq.c
new file mode 100644 (file)
index 0000000..020ae6c
--- /dev/null
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+void vnic_cq_free(struct vnic_cq *cq)
+{
+       vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
+
+       cq->ctrl = NULL;
+}
+
+int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
+       unsigned int desc_count, unsigned int desc_size)
+{
+       int err;
+
+       cq->index = index;
+       cq->vdev = vdev;
+
+       cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
+       if (!cq->ctrl) {
+               printk(KERN_ERR "Failed to hook CQ[%d] resource\n", index);
+               return -EINVAL;
+       }
+
+       err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
+       if (err)
+               return err;
+
+       return 0;
+}
+
+void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
+       unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
+       unsigned int cq_tail_color, unsigned int interrupt_enable,
+       unsigned int cq_entry_enable, unsigned int cq_message_enable,
+       unsigned int interrupt_offset, u64 cq_message_addr)
+{
+       u64 paddr;
+
+       paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
+       writeq(paddr, &cq->ctrl->ring_base);
+       iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
+       iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
+       iowrite32(color_enable, &cq->ctrl->color_enable);
+       iowrite32(cq_head, &cq->ctrl->cq_head);
+       iowrite32(cq_tail, &cq->ctrl->cq_tail);
+       iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
+       iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
+       iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
+       iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
+       iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
+       writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
+}
+
+void vnic_cq_clean(struct vnic_cq *cq)
+{
+       cq->to_clean = 0;
+       cq->last_color = 0;
+
+       iowrite32(0, &cq->ctrl->cq_head);
+       iowrite32(0, &cq->ctrl->cq_tail);
+       iowrite32(1, &cq->ctrl->cq_tail_color);
+
+       vnic_dev_clear_desc_ring(&cq->ring);
+}
diff --git a/drivers/net/enic/vnic_cq.h b/drivers/net/enic/vnic_cq.h
new file mode 100644 (file)
index 0000000..114763c
--- /dev/null
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_CQ_H_
+#define _VNIC_CQ_H_
+
+#include "cq_desc.h"
+#include "vnic_dev.h"
+
+/* Completion queue control */
+struct vnic_cq_ctrl {
+       u64 ring_base;                  /* 0x00 */
+       u32 ring_size;                  /* 0x08 */
+       u32 pad0;
+       u32 flow_control_enable;        /* 0x10 */
+       u32 pad1;
+       u32 color_enable;               /* 0x18 */
+       u32 pad2;
+       u32 cq_head;                    /* 0x20 */
+       u32 pad3;
+       u32 cq_tail;                    /* 0x28 */
+       u32 pad4;
+       u32 cq_tail_color;              /* 0x30 */
+       u32 pad5;
+       u32 interrupt_enable;           /* 0x38 */
+       u32 pad6;
+       u32 cq_entry_enable;            /* 0x40 */
+       u32 pad7;
+       u32 cq_message_enable;          /* 0x48 */
+       u32 pad8;
+       u32 interrupt_offset;           /* 0x50 */
+       u32 pad9;
+       u64 cq_message_addr;            /* 0x58 */
+       u32 pad10;
+};
+
+struct vnic_cq {
+       unsigned int index;
+       struct vnic_dev *vdev;
+       struct vnic_cq_ctrl __iomem *ctrl;              /* memory-mapped */
+       struct vnic_dev_ring ring;
+       unsigned int to_clean;
+       unsigned int last_color;
+};
+
+static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
+       unsigned int work_to_do,
+       int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
+       u8 type, u16 q_number, u16 completed_index, void *opaque),
+       void *opaque)
+{
+       struct cq_desc *cq_desc;
+       unsigned int work_done = 0;
+       u16 q_number, completed_index;
+       u8 type, color;
+
+       cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
+               cq->ring.desc_size * cq->to_clean);
+       cq_desc_dec(cq_desc, &type, &color,
+               &q_number, &completed_index);
+
+       while (color != cq->last_color) {
+
+               if ((*q_service)(cq->vdev, cq_desc, type,
+                       q_number, completed_index, opaque))
+                       break;
+
+               cq->to_clean++;
+               if (cq->to_clean == cq->ring.desc_count) {
+                       cq->to_clean = 0;
+                       cq->last_color = cq->last_color ? 0 : 1;
+               }
+
+               cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
+                       cq->ring.desc_size * cq->to_clean);
+               cq_desc_dec(cq_desc, &type, &color,
+                       &q_number, &completed_index);
+
+               work_done++;
+               if (work_done >= work_to_do)
+                       break;
+       }
+
+       return work_done;
+}
+
+void vnic_cq_free(struct vnic_cq *cq);
+int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
+       unsigned int desc_count, unsigned int desc_size);
+void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
+       unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
+       unsigned int cq_tail_color, unsigned int interrupt_enable,
+       unsigned int cq_entry_enable, unsigned int message_enable,
+       unsigned int interrupt_offset, u64 message_addr);
+void vnic_cq_clean(struct vnic_cq *cq);
+
+#endif /* _VNIC_CQ_H_ */
diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c
new file mode 100644 (file)
index 0000000..4d104f5
--- /dev/null
@@ -0,0 +1,674 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/if_ether.h>
+
+#include "vnic_resource.h"
+#include "vnic_devcmd.h"
+#include "vnic_dev.h"
+#include "vnic_stats.h"
+
+struct vnic_res {
+       void __iomem *vaddr;
+       unsigned int count;
+};
+
+struct vnic_dev {
+       void *priv;
+       struct pci_dev *pdev;
+       struct vnic_res res[RES_TYPE_MAX];
+       enum vnic_dev_intr_mode intr_mode;
+       struct vnic_devcmd __iomem *devcmd;
+       struct vnic_devcmd_notify *notify;
+       struct vnic_devcmd_notify notify_copy;
+       dma_addr_t notify_pa;
+       u32 *linkstatus;
+       dma_addr_t linkstatus_pa;
+       struct vnic_stats *stats;
+       dma_addr_t stats_pa;
+       struct vnic_devcmd_fw_info *fw_info;
+       dma_addr_t fw_info_pa;
+};
+
+#define VNIC_MAX_RES_HDR_SIZE \
+       (sizeof(struct vnic_resource_header) + \
+       sizeof(struct vnic_resource) * RES_TYPE_MAX)
+#define VNIC_RES_STRIDE        128
+
+void *vnic_dev_priv(struct vnic_dev *vdev)
+{
+       return vdev->priv;
+}
+
+static int vnic_dev_discover_res(struct vnic_dev *vdev,
+       struct vnic_dev_bar *bar)
+{
+       struct vnic_resource_header __iomem *rh;
+       struct vnic_resource __iomem *r;
+       u8 type;
+
+       if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
+               printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
+               return -EINVAL;
+       }
+
+       rh = bar->vaddr;
+       if (!rh) {
+               printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
+               return -EINVAL;
+       }
+
+       if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
+           ioread32(&rh->version) != VNIC_RES_VERSION) {
+               printk(KERN_ERR "vNIC BAR0 res magic/version error "
+                       "exp (%lx/%lx) curr (%x/%x)\n",
+                       VNIC_RES_MAGIC, VNIC_RES_VERSION,
+                       ioread32(&rh->magic), ioread32(&rh->version));
+               return -EINVAL;
+       }
+
+       r = (struct vnic_resource __iomem *)(rh + 1);
+
+       while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
+
+               u8 bar_num = ioread8(&r->bar);
+               u32 bar_offset = ioread32(&r->bar_offset);
+               u32 count = ioread32(&r->count);
+               u32 len;
+
+               r++;
+
+               if (bar_num != 0)  /* only mapping in BAR0 resources */
+                       continue;
+
+               switch (type) {
+               case RES_TYPE_WQ:
+               case RES_TYPE_RQ:
+               case RES_TYPE_CQ:
+               case RES_TYPE_INTR_CTRL:
+                       /* each count is stride bytes long */
+                       len = count * VNIC_RES_STRIDE;
+                       if (len + bar_offset > bar->len) {
+                               printk(KERN_ERR "vNIC BAR0 resource %d "
+                                       "out-of-bounds, offset 0x%x + "
+                                       "size 0x%x > bar len 0x%lx\n",
+                                       type, bar_offset,
+                                       len,
+                                       bar->len);
+                               return -EINVAL;
+                       }
+                       break;
+               case RES_TYPE_INTR_PBA_LEGACY:
+               case RES_TYPE_DEVCMD:
+                       len = count;
+                       break;
+               default:
+                       continue;
+               }
+
+               vdev->res[type].count = count;
+               vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
+       }
+
+       return 0;
+}
+
+unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
+       enum vnic_res_type type)
+{
+       return vdev->res[type].count;
+}
+
+void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
+       unsigned int index)
+{
+       if (!vdev->res[type].vaddr)
+               return NULL;
+
+       switch (type) {
+       case RES_TYPE_WQ:
+       case RES_TYPE_RQ:
+       case RES_TYPE_CQ:
+       case RES_TYPE_INTR_CTRL:
+               return (char __iomem *)vdev->res[type].vaddr +
+                       index * VNIC_RES_STRIDE;
+       default:
+               return (char __iomem *)vdev->res[type].vaddr;
+       }
+}
+
+unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
+       unsigned int desc_count, unsigned int desc_size)
+{
+       /* The base address of the desc rings must be 512 byte aligned.
+        * Descriptor count is aligned to groups of 32 descriptors.  A
+        * count of 0 means the maximum 4096 descriptors.  Descriptor
+        * size is aligned to 16 bytes.
+        */
+
+       unsigned int count_align = 32;
+       unsigned int desc_align = 16;
+
+       ring->base_align = 512;
+
+       if (desc_count == 0)
+               desc_count = 4096;
+
+       ring->desc_count = ALIGN(desc_count, count_align);
+
+       ring->desc_size = ALIGN(desc_size, desc_align);
+
+       ring->size = ring->desc_count * ring->desc_size;
+       ring->size_unaligned = ring->size + ring->base_align;
+
+       return ring->size_unaligned;
+}
+
+void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
+{
+       memset(ring->descs, 0, ring->size);
+}
+
+int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
+       unsigned int desc_count, unsigned int desc_size)
+{
+       vnic_dev_desc_ring_size(ring, desc_count, desc_size);
+
+       ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
+               ring->size_unaligned,
+               &ring->base_addr_unaligned);
+
+       if (!ring->descs_unaligned) {
+               printk(KERN_ERR
+                 "Failed to allocate ring (size=%d), aborting\n",
+                       (int)ring->size);
+               return -ENOMEM;
+       }
+
+       ring->base_addr = ALIGN(ring->base_addr_unaligned,
+               ring->base_align);
+       ring->descs = (u8 *)ring->descs_unaligned +
+               (ring->base_addr - ring->base_addr_unaligned);
+
+       vnic_dev_clear_desc_ring(ring);
+
+       ring->desc_avail = ring->desc_count - 1;
+
+       return 0;
+}
+
+void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
+{
+       if (ring->descs) {
+               pci_free_consistent(vdev->pdev,
+                       ring->size_unaligned,
+                       ring->descs_unaligned,
+                       ring->base_addr_unaligned);
+               ring->descs = NULL;
+       }
+}
+
+int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
+       u64 *a0, u64 *a1, int wait)
+{
+       struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
+       int delay;
+       u32 status;
+       int dev_cmd_err[] = {
+               /* convert from fw's version of error.h to host's version */
+               0,      /* ERR_SUCCESS */
+               EINVAL, /* ERR_EINVAL */
+               EFAULT, /* ERR_EFAULT */
+               EPERM,  /* ERR_EPERM */
+               EBUSY,  /* ERR_EBUSY */
+       };
+       int err;
+
+       status = ioread32(&devcmd->status);
+       if (status & STAT_BUSY) {
+               printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
+               return -EBUSY;
+       }
+
+       if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
+               writeq(*a0, &devcmd->args[0]);
+               writeq(*a1, &devcmd->args[1]);
+               wmb();
+       }
+
+       iowrite32(cmd, &devcmd->cmd);
+
+       if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
+                       return 0;
+
+       for (delay = 0; delay < wait; delay++) {
+
+               udelay(100);
+
+               status = ioread32(&devcmd->status);
+               if (!(status & STAT_BUSY)) {
+
+                       if (status & STAT_ERROR) {
+                               err = dev_cmd_err[(int)readq(&devcmd->args[0])];
+                               printk(KERN_ERR "Error %d devcmd %d\n",
+                                       err, _CMD_N(cmd));
+                               return -err;
+                       }
+
+                       if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
+                               rmb();
+                               *a0 = readq(&devcmd->args[0]);
+                               *a1 = readq(&devcmd->args[1]);
+                       }
+
+                       return 0;
+               }
+       }
+
+       printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
+       return -ETIMEDOUT;
+}
+
+int vnic_dev_fw_info(struct vnic_dev *vdev,
+       struct vnic_devcmd_fw_info **fw_info)
+{
+       u64 a0, a1 = 0;
+       int wait = 1000;
+       int err = 0;
+
+       if (!vdev->fw_info) {
+               vdev->fw_info = pci_alloc_consistent(vdev->pdev,
+                       sizeof(struct vnic_devcmd_fw_info),
+                       &vdev->fw_info_pa);
+               if (!vdev->fw_info)
+                       return -ENOMEM;
+
+               a0 = vdev->fw_info_pa;
+
+               /* only get fw_info once and cache it */
+               err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
+       }
+
+       *fw_info = vdev->fw_info;
+
+       return err;
+}
+
+int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
+       void *value)
+{
+       u64 a0, a1;
+       int wait = 1000;
+       int err;
+
+       a0 = offset;
+       a1 = size;
+
+       err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
+
+       switch (size) {
+       case 1: *(u8 *)value = (u8)a0; break;
+       case 2: *(u16 *)value = (u16)a0; break;
+       case 4: *(u32 *)value = (u32)a0; break;
+       case 8: *(u64 *)value = a0; break;
+       default: BUG(); break;
+       }
+
+       return err;
+}
+
+int vnic_dev_stats_clear(struct vnic_dev *vdev)
+{
+       u64 a0 = 0, a1 = 0;
+       int wait = 1000;
+       return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
+}
+
+int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
+{
+       u64 a0, a1;
+       int wait = 1000;
+
+       if (!vdev->stats) {
+               vdev->stats = pci_alloc_consistent(vdev->pdev,
+                       sizeof(struct vnic_stats), &vdev->stats_pa);
+               if (!vdev->stats)
+                       return -ENOMEM;
+       }
+
+       *stats = vdev->stats;
+       a0 = vdev->stats_pa;
+       a1 = sizeof(struct vnic_stats);
+
+       return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
+}
+
+int vnic_dev_close(struct vnic_dev *vdev)
+{
+       u64 a0 = 0, a1 = 0;
+       int wait = 1000;
+       return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
+}
+
+int vnic_dev_enable(struct vnic_dev *vdev)
+{
+       u64 a0 = 0, a1 = 0;
+       int wait = 1000;
+       return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
+}
+
+int vnic_dev_disable(struct vnic_dev *vdev)
+{
+       u64 a0 = 0, a1 = 0;
+       int wait = 1000;
+       return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
+}
+
+int vnic_dev_open(struct vnic_dev *vdev, int arg)
+{
+       u64 a0 = (u32)arg, a1 = 0;
+       int wait = 1000;
+       return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
+}
+
+int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
+{
+       u64 a0 = 0, a1 = 0;
+       int wait = 1000;
+       int err;
+
+       *done = 0;
+
+       err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
+       if (err)
+               return err;
+
+       *done = (a0 == 0);
+
+       return 0;
+}
+
+int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
+{
+       u64 a0 = (u32)arg, a1 = 0;
+       int wait = 1000;
+       return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
+}
+
+int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
+{
+       u64 a0 = 0, a1 = 0;
+       int wait = 1000;
+       int err;
+
+       *done = 0;
+
+       err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
+       if (err)
+               return err;
+
+       *done = (a0 == 0);
+
+       return 0;
+}
+
+int vnic_dev_hang_notify(struct vnic_dev *vdev)
+{
+       u64 a0, a1;
+       int wait = 1000;
+       return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
+}
+
+int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
+{
+       u64 a0, a1;
+       int wait = 1000;
+       int err, i;
+
+       for (i = 0; i < ETH_ALEN; i++)
+               mac_addr[i] = 0;
+
+       err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
+       if (err)
+               return err;
+
+       for (i = 0; i < ETH_ALEN; i++)
+               mac_addr[i] = ((u8 *)&a0)[i];
+
+       return 0;
+}
+
+void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
+       int broadcast, int promisc, int allmulti)
+{
+       u64 a0, a1 = 0;
+       int wait = 1000;
+       int err;
+
+       a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
+            (multicast ? CMD_PFILTER_MULTICAST : 0) |
+            (broadcast ? CMD_PFILTER_BROADCAST : 0) |
+            (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
+            (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
+
+       err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
+       if (err)
+               printk(KERN_ERR "Can't set packet filter\n");
+}
+
+void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
+{
+       u64 a0 = 0, a1 = 0;
+       int wait = 1000;
+       int err;
+       int i;
+
+       for (i = 0; i < ETH_ALEN; i++)
+               ((u8 *)&a0)[i] = addr[i];
+
+       err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
+       if (err)
+               printk(KERN_ERR
+                       "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
+                       addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
+                       err);
+}
+
+void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
+{
+       u64 a0 = 0, a1 = 0;
+       int wait = 1000;
+       int err;
+       int i;
+
+       for (i = 0; i < ETH_ALEN; i++)
+               ((u8 *)&a0)[i] = addr[i];
+
+       err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
+       if (err)
+               printk(KERN_ERR
+                       "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
+                       addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
+                       err);
+}
+
+int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
+{
+       u64 a0, a1;
+       int wait = 1000;
+
+       if (!vdev->notify) {
+               vdev->notify = pci_alloc_consistent(vdev->pdev,
+                       sizeof(struct vnic_devcmd_notify),
+                       &vdev->notify_pa);
+               if (!vdev->notify)
+                       return -ENOMEM;
+       }
+
+       a0 = vdev->notify_pa;
+       a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
+       a1 += sizeof(struct vnic_devcmd_notify);
+
+       return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+}
+
+void vnic_dev_notify_unset(struct vnic_dev *vdev)
+{
+       u64 a0, a1;
+       int wait = 1000;
+
+       a0 = 0;  /* paddr = 0 to unset notify buffer */
+       a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
+       a1 += sizeof(struct vnic_devcmd_notify);
+
+       vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+}
+
+static int vnic_dev_notify_ready(struct vnic_dev *vdev)
+{
+       u32 *words;
+       unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
+       unsigned int i;
+       u32 csum;
+
+       if (!vdev->notify)
+               return 0;
+
+       do {
+               csum = 0;
+               memcpy(&vdev->notify_copy, vdev->notify,
+                       sizeof(struct vnic_devcmd_notify));
+               words = (u32 *)&vdev->notify_copy;
+               for (i = 1; i < nwords; i++)
+                       csum += words[i];
+       } while (csum != words[0]);
+
+       return 1;
+}
+
+int vnic_dev_init(struct vnic_dev *vdev, int arg)
+{
+       u64 a0 = (u32)arg, a1 = 0;
+       int wait = 1000;
+       return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
+}
+
+int vnic_dev_link_status(struct vnic_dev *vdev)
+{
+       if (vdev->linkstatus)
+               return *vdev->linkstatus;
+
+       if (!vnic_dev_notify_ready(vdev))
+               return 0;
+
+       return vdev->notify_copy.link_state;
+}
+
+u32 vnic_dev_port_speed(struct vnic_dev *vdev)
+{
+       if (!vnic_dev_notify_ready(vdev))
+               return 0;
+
+       return vdev->notify_copy.port_speed;
+}
+
+u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
+{
+       if (!vnic_dev_notify_ready(vdev))
+               return 0;
+
+       return vdev->notify_copy.msglvl;
+}
+
+u32 vnic_dev_mtu(struct vnic_dev *vdev)
+{
+       if (!vnic_dev_notify_ready(vdev))
+               return 0;
+
+       return vdev->notify_copy.mtu;
+}
+
+void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
+       enum vnic_dev_intr_mode intr_mode)
+{
+       vdev->intr_mode = intr_mode;
+}
+
+enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
+       struct vnic_dev *vdev)
+{
+       return vdev->intr_mode;
+}
+
+void vnic_dev_unregister(struct vnic_dev *vdev)
+{
+       if (vdev) {
+               if (vdev->notify)
+                       pci_free_consistent(vdev->pdev,
+                               sizeof(struct vnic_devcmd_notify),
+                               vdev->notify,
+                               vdev->notify_pa);
+               if (vdev->linkstatus)
+                       pci_free_consistent(vdev->pdev,
+                               sizeof(u32),
+                               vdev->linkstatus,
+                               vdev->linkstatus_pa);
+               if (vdev->stats)
+                       pci_free_consistent(vdev->pdev,
+                               sizeof(struct vnic_dev),
+                               vdev->stats, vdev->stats_pa);
+               if (vdev->fw_info)
+                       pci_free_consistent(vdev->pdev,
+                               sizeof(struct vnic_devcmd_fw_info),
+                               vdev->fw_info, vdev->fw_info_pa);
+               kfree(vdev);
+       }
+}
+
+struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
+       void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
+{
+       if (!vdev) {
+               vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
+               if (!vdev)
+                       return NULL;
+       }
+
+       vdev->priv = priv;
+       vdev->pdev = pdev;
+
+       if (vnic_dev_discover_res(vdev, bar))
+               goto err_out;
+
+       vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
+       if (!vdev->devcmd)
+               goto err_out;
+
+       return vdev;
+
+err_out:
+       vnic_dev_unregister(vdev);
+       return NULL;
+}
+
diff --git a/drivers/net/enic/vnic_dev.h b/drivers/net/enic/vnic_dev.h
new file mode 100644 (file)
index 0000000..2dcffd3
--- /dev/null
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_DEV_H_
+#define _VNIC_DEV_H_
+
+#include "vnic_resource.h"
+#include "vnic_devcmd.h"
+
+#ifndef VNIC_PADDR_TARGET
+#define VNIC_PADDR_TARGET      0x0000000000000000ULL
+#endif
+
+enum vnic_dev_intr_mode {
+       VNIC_DEV_INTR_MODE_UNKNOWN,
+       VNIC_DEV_INTR_MODE_INTX,
+       VNIC_DEV_INTR_MODE_MSI,
+       VNIC_DEV_INTR_MODE_MSIX,
+};
+
+struct vnic_dev_bar {
+       void __iomem *vaddr;
+       dma_addr_t bus_addr;
+       unsigned long len;
+};
+
+struct vnic_dev_ring {
+       void *descs;
+       size_t size;
+       dma_addr_t base_addr;
+       size_t base_align;
+       void *descs_unaligned;
+       size_t size_unaligned;
+       dma_addr_t base_addr_unaligned;
+       unsigned int desc_size;
+       unsigned int desc_count;
+       unsigned int desc_avail;
+};
+
+struct vnic_dev;
+struct vnic_stats;
+
+void *vnic_dev_priv(struct vnic_dev *vdev);
+unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
+       enum vnic_res_type type);
+void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
+       unsigned int index);
+unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
+       unsigned int desc_count, unsigned int desc_size);
+void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring);
+int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
+       unsigned int desc_count, unsigned int desc_size);
+void vnic_dev_free_desc_ring(struct vnic_dev *vdev,
+       struct vnic_dev_ring *ring);
+int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
+       u64 *a0, u64 *a1, int wait);
+int vnic_dev_fw_info(struct vnic_dev *vdev,
+       struct vnic_devcmd_fw_info **fw_info);
+int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
+       void *value);
+int vnic_dev_stats_clear(struct vnic_dev *vdev);
+int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats);
+int vnic_dev_hang_notify(struct vnic_dev *vdev);
+void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
+       int broadcast, int promisc, int allmulti);
+void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr);
+void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr);
+int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr);
+int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr);
+void vnic_dev_notify_unset(struct vnic_dev *vdev);
+int vnic_dev_link_status(struct vnic_dev *vdev);
+u32 vnic_dev_port_speed(struct vnic_dev *vdev);
+u32 vnic_dev_msg_lvl(struct vnic_dev *vdev);
+u32 vnic_dev_mtu(struct vnic_dev *vdev);
+int vnic_dev_close(struct vnic_dev *vdev);
+int vnic_dev_enable(struct vnic_dev *vdev);
+int vnic_dev_disable(struct vnic_dev *vdev);
+int vnic_dev_open(struct vnic_dev *vdev, int arg);
+int vnic_dev_open_done(struct vnic_dev *vdev, int *done);
+int vnic_dev_init(struct vnic_dev *vdev, int arg);
+int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg);
+int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done);
+void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
+       enum vnic_dev_intr_mode intr_mode);
+enum vnic_dev_intr_mode vnic_dev_get_intr_mode(struct vnic_dev *vdev);
+void vnic_dev_unregister(struct vnic_dev *vdev);
+struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
+       void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar);
+
+#endif /* _VNIC_DEV_H_ */
diff --git a/drivers/net/enic/vnic_devcmd.h b/drivers/net/enic/vnic_devcmd.h
new file mode 100644 (file)
index 0000000..d8617a3
--- /dev/null
@@ -0,0 +1,282 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_DEVCMD_H_
+#define _VNIC_DEVCMD_H_
+
+#define _CMD_NBITS      14
+#define _CMD_VTYPEBITS 10
+#define _CMD_FLAGSBITS  6
+#define _CMD_DIRBITS   2
+
+#define _CMD_NMASK      ((1 << _CMD_NBITS)-1)
+#define _CMD_VTYPEMASK  ((1 << _CMD_VTYPEBITS)-1)
+#define _CMD_FLAGSMASK  ((1 << _CMD_FLAGSBITS)-1)
+#define _CMD_DIRMASK    ((1 << _CMD_DIRBITS)-1)
+
+#define _CMD_NSHIFT     0
+#define _CMD_VTYPESHIFT (_CMD_NSHIFT+_CMD_NBITS)
+#define _CMD_FLAGSSHIFT (_CMD_VTYPESHIFT+_CMD_VTYPEBITS)
+#define _CMD_DIRSHIFT   (_CMD_FLAGSSHIFT+_CMD_FLAGSBITS)
+
+/*
+ * Direction bits (from host perspective).
+ */
+#define _CMD_DIR_NONE   0U
+#define _CMD_DIR_WRITE  1U
+#define _CMD_DIR_READ   2U
+#define _CMD_DIR_RW     (_CMD_DIR_WRITE | _CMD_DIR_READ)
+
+/*
+ * Flag bits.
+ */
+#define _CMD_FLAGS_NONE 0U
+#define _CMD_FLAGS_NOWAIT 1U
+
+/*
+ * vNIC type bits.
+ */
+#define _CMD_VTYPE_NONE  0U
+#define _CMD_VTYPE_ENET  1U
+#define _CMD_VTYPE_FC    2U
+#define _CMD_VTYPE_SCSI  4U
+#define _CMD_VTYPE_ALL   (_CMD_VTYPE_ENET | _CMD_VTYPE_FC | _CMD_VTYPE_SCSI)
+
+/*
+ * Used to create cmds..
+*/
+#define _CMDCF(dir, flags, vtype, nr)  \
+       (((dir)   << _CMD_DIRSHIFT) | \
+       ((flags) << _CMD_FLAGSSHIFT) | \
+       ((vtype) << _CMD_VTYPESHIFT) | \
+       ((nr)    << _CMD_NSHIFT))
+#define _CMDC(dir, vtype, nr)    _CMDCF(dir, 0, vtype, nr)
+#define _CMDCNW(dir, vtype, nr)  _CMDCF(dir, _CMD_FLAGS_NOWAIT, vtype, nr)
+
+/*
+ * Used to decode cmds..
+*/
+#define _CMD_DIR(cmd)            (((cmd) >> _CMD_DIRSHIFT) & _CMD_DIRMASK)
+#define _CMD_FLAGS(cmd)          (((cmd) >> _CMD_FLAGSSHIFT) & _CMD_FLAGSMASK)
+#define _CMD_VTYPE(cmd)          (((cmd) >> _CMD_VTYPESHIFT) & _CMD_VTYPEMASK)
+#define _CMD_N(cmd)              (((cmd) >> _CMD_NSHIFT) & _CMD_NMASK)
+
+enum vnic_devcmd_cmd {
+       CMD_NONE                = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_NONE, 0),
+
+       /* mcpu fw info in mem: (u64)a0=paddr to struct vnic_devcmd_fw_info */
+       CMD_MCPU_FW_INFO        = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 1),
+
+       /* dev-specific block member:
+        *    in: (u16)a0=offset,(u8)a1=size
+        *    out: a0=value */
+       CMD_DEV_SPEC            = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 2),
+
+       /* stats clear */
+       CMD_STATS_CLEAR         = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 3),
+
+       /* stats dump in mem: (u64)a0=paddr to stats area,
+        *                    (u16)a1=sizeof stats area */
+       CMD_STATS_DUMP          = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 4),
+
+       /* set Rx packet filter: (u32)a0=filters (see CMD_PFILTER_*) */
+       CMD_PACKET_FILTER       = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 7),
+
+       /* hang detection notification */
+       CMD_HANG_NOTIFY         = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 8),
+
+       /* MAC address in (u48)a0 */
+       CMD_MAC_ADDR            = _CMDC(_CMD_DIR_READ,
+                                       _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 9),
+
+       /* disable/enable promisc mode: (u8)a0=0/1 */
+/***** XXX DEPRECATED *****/
+       CMD_PROMISC_MODE        = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 10),
+
+       /* disable/enable all-multi mode: (u8)a0=0/1 */
+/***** XXX DEPRECATED *****/
+       CMD_ALLMULTI_MODE       = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 11),
+
+       /* add addr from (u48)a0 */
+       CMD_ADDR_ADD            = _CMDCNW(_CMD_DIR_WRITE,
+                                       _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 12),
+
+       /* del addr from (u48)a0 */
+       CMD_ADDR_DEL            = _CMDCNW(_CMD_DIR_WRITE,
+                                       _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 13),
+
+       /* add VLAN id in (u16)a0 */
+       CMD_VLAN_ADD            = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 14),
+
+       /* del VLAN id in (u16)a0 */
+       CMD_VLAN_DEL            = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 15),
+
+       /* nic_cfg in (u32)a0 */
+       CMD_NIC_CFG             = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
+
+       /* union vnic_rss_key in mem: (u64)a0=paddr, (u16)a1=len */
+       CMD_RSS_KEY             = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 17),
+
+       /* union vnic_rss_cpu in mem: (u64)a0=paddr, (u16)a1=len */
+       CMD_RSS_CPU             = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 18),
+
+       /* initiate softreset */
+       CMD_SOFT_RESET          = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 19),
+
+       /* softreset status:
+        *    out: a0=0 reset complete, a0=1 reset in progress */
+       CMD_SOFT_RESET_STATUS   = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 20),
+
+       /* set struct vnic_devcmd_notify buffer in mem:
+        * in:
+        *   (u64)a0=paddr to notify (set paddr=0 to unset)
+        *   (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
+        *   (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
+        * out:
+        *   (u32)a1 = effective size
+        */
+       CMD_NOTIFY              = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21),
+
+       /* UNDI API: (u64)a0=paddr to s_PXENV_UNDI_ struct,
+        *           (u8)a1=PXENV_UNDI_xxx */
+       CMD_UNDI                = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 22),
+
+       /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */
+       CMD_OPEN                = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23),
+
+       /* open status:
+        *    out: a0=0 open complete, a0=1 open in progress */
+       CMD_OPEN_STATUS         = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24),
+
+       /* close vnic */
+       CMD_CLOSE               = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),
+
+       /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
+       CMD_INIT                = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
+
+       /* variant of CMD_INIT, with provisioning info
+        *     (u64)a0=paddr of vnic_devcmd_provinfo
+        *     (u32)a1=sizeof provision info */
+       CMD_INIT_PROV_INFO      = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 27),
+
+       /* enable virtual link */
+       CMD_ENABLE              = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),
+
+       /* disable virtual link */
+       CMD_DISABLE             = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29),
+
+       /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */
+       CMD_STATS_DUMP_ALL      = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30),
+
+       /* init status:
+        *    out: a0=0 init complete, a0=1 init in progress
+        *         if a0=0, a1=errno */
+       CMD_INIT_STATUS         = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31),
+
+       /* INT13 API: (u64)a0=paddr to vnic_int13_params struct
+        *            (u8)a1=INT13_CMD_xxx */
+       CMD_INT13               = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_FC, 32),
+
+       /* logical uplink enable/disable: (u64)a0: 0/1=disable/enable */
+       CMD_LOGICAL_UPLINK      = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 33),
+
+       /* undo initialize of virtual link */
+       CMD_DEINIT              = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
+};
+
+/* flags for CMD_OPEN */
+#define CMD_OPENF_OPROM                0x1     /* open coming from option rom */
+
+/* flags for CMD_INIT */
+#define CMD_INITF_DEFAULT_MAC  0x1     /* init with default mac addr */
+
+/* flags for CMD_PACKET_FILTER */
+#define CMD_PFILTER_DIRECTED           0x01
+#define CMD_PFILTER_MULTICAST          0x02
+#define CMD_PFILTER_BROADCAST          0x04
+#define CMD_PFILTER_PROMISCUOUS                0x08
+#define CMD_PFILTER_ALL_MULTICAST      0x10
+
+enum vnic_devcmd_status {
+       STAT_NONE = 0,
+       STAT_BUSY = 1 << 0,     /* cmd in progress */
+       STAT_ERROR = 1 << 1,    /* last cmd caused error (code in a0) */
+};
+
+enum vnic_devcmd_error {
+       ERR_SUCCESS = 0,
+       ERR_EINVAL = 1,
+       ERR_EFAULT = 2,
+       ERR_EPERM = 3,
+       ERR_EBUSY = 4,
+       ERR_ECMDUNKNOWN = 5,
+       ERR_EBADSTATE = 6,
+       ERR_ENOMEM = 7,
+       ERR_ETIMEDOUT = 8,
+       ERR_ELINKDOWN = 9,
+};
+
+struct vnic_devcmd_fw_info {
+       char fw_version[32];
+       char fw_build[32];
+       char hw_version[32];
+       char hw_serial_number[32];
+};
+
+struct vnic_devcmd_notify {
+       u32 csum;               /* checksum over following words */
+
+       u32 link_state;         /* link up == 1 */
+       u32 port_speed;         /* effective port speed (rate limit) */
+       u32 mtu;                /* MTU */
+       u32 msglvl;             /* requested driver msg lvl */
+       u32 uif;                /* uplink interface */
+       u32 status;             /* status bits (see VNIC_STF_*) */
+       u32 error;              /* error code (see ERR_*) for first ERR */
+};
+#define VNIC_STF_FATAL_ERR     0x0001  /* fatal fw error */
+
+struct vnic_devcmd_provinfo {
+       u8 oui[3];
+       u8 type;
+       u8 data[0];
+};
+
+/*
+ * Writing cmd register causes STAT_BUSY to get set in status register.
+ * When cmd completes, STAT_BUSY will be cleared.
+ *
+ * If cmd completed successfully STAT_ERROR will be clear
+ * and args registers contain cmd-specific results.
+ *
+ * If cmd error, STAT_ERROR will be set and args[0] contains error code.
+ *
+ * status register is read-only.  While STAT_BUSY is set,
+ * all other register contents are read-only.
+ */
+
+/* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */
+#define VNIC_DEVCMD_NARGS 15
+struct vnic_devcmd {
+       u32 status;                     /* RO */
+       u32 cmd;                        /* RW */
+       u64 args[VNIC_DEVCMD_NARGS];    /* RW cmd args (little-endian) */
+};
+
+#endif /* _VNIC_DEVCMD_H_ */
diff --git a/drivers/net/enic/vnic_enet.h b/drivers/net/enic/vnic_enet.h
new file mode 100644 (file)
index 0000000..6332ac9
--- /dev/null
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_ENIC_H_
+#define _VNIC_ENIC_H_
+
+/* Device-specific region: enet configuration */
+struct vnic_enet_config {
+       u32 flags;
+       u32 wq_desc_count;
+       u32 rq_desc_count;
+       u16 mtu;
+       u16 intr_timer;
+       u8 intr_timer_type;
+       u8 intr_mode;
+       char devname[16];
+};
+
+#define VENETF_TSO             0x1     /* TSO enabled */
+#define VENETF_LRO             0x2     /* LRO enabled */
+#define VENETF_RXCSUM          0x4     /* RX csum enabled */
+#define VENETF_TXCSUM          0x8     /* TX csum enabled */
+#define VENETF_RSS             0x10    /* RSS enabled */
+#define VENETF_RSSHASH_IPV4    0x20    /* Hash on IPv4 fields */
+#define VENETF_RSSHASH_TCPIPV4 0x40    /* Hash on TCP + IPv4 fields */
+#define VENETF_RSSHASH_IPV6    0x80    /* Hash on IPv6 fields */
+#define VENETF_RSSHASH_TCPIPV6 0x100   /* Hash on TCP + IPv6 fields */
+#define VENETF_RSSHASH_IPV6_EX 0x200   /* Hash on IPv6 extended fields */
+#define VENETF_RSSHASH_TCPIPV6_EX 0x400        /* Hash on TCP + IPv6 ext. fields */
+
+#endif /* _VNIC_ENIC_H_ */
diff --git a/drivers/net/enic/vnic_intr.c b/drivers/net/enic/vnic_intr.c
new file mode 100644 (file)
index 0000000..ddc38f8
--- /dev/null
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+
+void vnic_intr_free(struct vnic_intr *intr)
+{
+       intr->ctrl = NULL;
+}
+
+int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
+       unsigned int index)
+{
+       intr->index = index;
+       intr->vdev = vdev;
+
+       intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
+       if (!intr->ctrl) {
+               printk(KERN_ERR "Failed to hook INTR[%d].ctrl resource\n",
+                       index);
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
+       unsigned int coalescing_type, unsigned int mask_on_assertion)
+{
+       iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
+       iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
+       iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
+       iowrite32(0, &intr->ctrl->int_credits);
+}
+
+void vnic_intr_clean(struct vnic_intr *intr)
+{
+       iowrite32(0, &intr->ctrl->int_credits);
+}
diff --git a/drivers/net/enic/vnic_intr.h b/drivers/net/enic/vnic_intr.h
new file mode 100644 (file)
index 0000000..ccc4081
--- /dev/null
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_INTR_H_
+#define _VNIC_INTR_H_
+
+#include <linux/pci.h>
+
+#include "vnic_dev.h"
+
+#define VNIC_INTR_TIMER_MAX            0xffff
+
+#define VNIC_INTR_TIMER_TYPE_ABS       0
+#define VNIC_INTR_TIMER_TYPE_QUIET     1
+
+/* Interrupt control */
+struct vnic_intr_ctrl {
+       u32 coalescing_timer;           /* 0x00 */
+       u32 pad0;
+       u32 coalescing_value;           /* 0x08 */
+       u32 pad1;
+       u32 coalescing_type;            /* 0x10 */
+       u32 pad2;
+       u32 mask_on_assertion;          /* 0x18 */
+       u32 pad3;
+       u32 mask;                       /* 0x20 */
+       u32 pad4;
+       u32 int_credits;                /* 0x28 */
+       u32 pad5;
+       u32 int_credit_return;          /* 0x30 */
+       u32 pad6;
+};
+
+struct vnic_intr {
+       unsigned int index;
+       struct vnic_dev *vdev;
+       struct vnic_intr_ctrl __iomem *ctrl;            /* memory-mapped */
+};
+
+static inline void vnic_intr_unmask(struct vnic_intr *intr)
+{
+       iowrite32(0, &intr->ctrl->mask);
+}
+
+static inline void vnic_intr_mask(struct vnic_intr *intr)
+{
+       iowrite32(1, &intr->ctrl->mask);
+}
+
+static inline void vnic_intr_return_credits(struct vnic_intr *intr,
+       unsigned int credits, int unmask, int reset_timer)
+{
+#define VNIC_INTR_UNMASK_SHIFT         16
+#define VNIC_INTR_RESET_TIMER_SHIFT    17
+
+       u32 int_credit_return = (credits & 0xffff) |
+               (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
+               (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
+
+       iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
+}
+
+static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
+{
+       /* get and ack interrupt in one read (clear-and-ack-on-read) */
+       return ioread32(legacy_pba);
+}
+
+void vnic_intr_free(struct vnic_intr *intr);
+int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
+       unsigned int index);
+void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
+       unsigned int coalescing_type, unsigned int mask_on_assertion);
+void vnic_intr_clean(struct vnic_intr *intr);
+
+#endif /* _VNIC_INTR_H_ */
diff --git a/drivers/net/enic/vnic_nic.h b/drivers/net/enic/vnic_nic.h
new file mode 100644 (file)
index 0000000..dadf26f
--- /dev/null
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_NIC_H_
+#define _VNIC_NIC_H_
+
+#define NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD     0xffUL
+#define NIC_CFG_RSS_DEFAULT_CPU_SHIFT          0
+#define NIC_CFG_RSS_HASH_TYPE                  (0xffUL << 8)
+#define NIC_CFG_RSS_HASH_TYPE_MASK_FIELD       0xffUL
+#define NIC_CFG_RSS_HASH_TYPE_SHIFT            8
+#define NIC_CFG_RSS_HASH_BITS                  (7UL << 16)
+#define NIC_CFG_RSS_HASH_BITS_MASK_FIELD       7UL
+#define NIC_CFG_RSS_HASH_BITS_SHIFT            16
+#define NIC_CFG_RSS_BASE_CPU                   (7UL << 19)
+#define NIC_CFG_RSS_BASE_CPU_MASK_FIELD                7UL
+#define NIC_CFG_RSS_BASE_CPU_SHIFT             19
+#define NIC_CFG_RSS_ENABLE                     (1UL << 22)
+#define NIC_CFG_RSS_ENABLE_MASK_FIELD          1UL
+#define NIC_CFG_RSS_ENABLE_SHIFT               22
+#define NIC_CFG_TSO_IPID_SPLIT_EN              (1UL << 23)
+#define NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD   1UL
+#define NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT                23
+#define NIC_CFG_IG_VLAN_STRIP_EN               (1UL << 24)
+#define NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD    1UL
+#define NIC_CFG_IG_VLAN_STRIP_EN_SHIFT         24
+
+static inline void vnic_set_nic_cfg(u32 *nic_cfg,
+       u8 rss_default_cpu, u8 rss_hash_type,
+       u8 rss_hash_bits, u8 rss_base_cpu,
+       u8 rss_enable, u8 tso_ipid_split_en,
+       u8 ig_vlan_strip_en)
+{
+       *nic_cfg = (rss_default_cpu & NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD) |
+               ((rss_hash_type & NIC_CFG_RSS_HASH_TYPE_MASK_FIELD)
+                       << NIC_CFG_RSS_HASH_TYPE_SHIFT) |
+               ((rss_hash_bits & NIC_CFG_RSS_HASH_BITS_MASK_FIELD)
+                       << NIC_CFG_RSS_HASH_BITS_SHIFT) |
+               ((rss_base_cpu & NIC_CFG_RSS_BASE_CPU_MASK_FIELD)
+                       << NIC_CFG_RSS_BASE_CPU_SHIFT) |
+               ((rss_enable & NIC_CFG_RSS_ENABLE_MASK_FIELD)
+                       << NIC_CFG_RSS_ENABLE_SHIFT) |
+               ((tso_ipid_split_en & NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD)
+                       << NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT) |
+               ((ig_vlan_strip_en & NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD)
+                       << NIC_CFG_IG_VLAN_STRIP_EN_SHIFT);
+}
+
+#endif /* _VNIC_NIC_H_ */
diff --git a/drivers/net/enic/vnic_resource.h b/drivers/net/enic/vnic_resource.h
new file mode 100644 (file)
index 0000000..144d281
--- /dev/null
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_RESOURCE_H_
+#define _VNIC_RESOURCE_H_
+
+#define VNIC_RES_MAGIC         0x766E6963L     /* 'vnic' */
+#define VNIC_RES_VERSION       0x00000000L
+
+/* vNIC resource types */
+enum vnic_res_type {
+       RES_TYPE_EOL,                   /* End-of-list */
+       RES_TYPE_WQ,                    /* Work queues */
+       RES_TYPE_RQ,                    /* Receive queues */
+       RES_TYPE_CQ,                    /* Completion queues */
+       RES_TYPE_RSVD1,
+       RES_TYPE_NIC_CFG,               /* Enet NIC config registers */
+       RES_TYPE_RSVD2,
+       RES_TYPE_RSVD3,
+       RES_TYPE_RSVD4,
+       RES_TYPE_RSVD5,
+       RES_TYPE_INTR_CTRL,             /* Interrupt ctrl table */
+       RES_TYPE_INTR_TABLE,            /* MSI/MSI-X Interrupt table */
+       RES_TYPE_INTR_PBA,              /* MSI/MSI-X PBA table */
+       RES_TYPE_INTR_PBA_LEGACY,       /* Legacy intr status, r2c */
+       RES_TYPE_RSVD6,
+       RES_TYPE_RSVD7,
+       RES_TYPE_DEVCMD,                /* Device command region */
+       RES_TYPE_PASS_THRU_PAGE,        /* Pass-thru page */
+
+       RES_TYPE_MAX,                   /* Count of resource types */
+};
+
+struct vnic_resource_header {
+       u32 magic;
+       u32 version;
+};
+
+struct vnic_resource {
+       u8 type;
+       u8 bar;
+       u8 pad[2];
+       u32 bar_offset;
+       u32 count;
+};
+
+#endif /* _VNIC_RESOURCE_H_ */
diff --git a/drivers/net/enic/vnic_rq.c b/drivers/net/enic/vnic_rq.c
new file mode 100644 (file)
index 0000000..9365e63
--- /dev/null
@@ -0,0 +1,199 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include "vnic_dev.h"
+#include "vnic_rq.h"
+
+static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
+{
+       struct vnic_rq_buf *buf;
+       struct vnic_dev *vdev;
+       unsigned int i, j, count = rq->ring.desc_count;
+       unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count);
+
+       vdev = rq->vdev;
+
+       for (i = 0; i < blks; i++) {
+               rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ, GFP_ATOMIC);
+               if (!rq->bufs[i]) {
+                       printk(KERN_ERR "Failed to alloc rq_bufs\n");
+                       return -ENOMEM;
+               }
+       }
+
+       for (i = 0; i < blks; i++) {
+               buf = rq->bufs[i];
+               for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES; j++) {
+                       buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES + j;
+                       buf->desc = (u8 *)rq->ring.descs +
+                               rq->ring.desc_size * buf->index;
+                       if (buf->index + 1 == count) {
+                               buf->next = rq->bufs[0];
+                               break;
+                       } else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES) {
+                               buf->next = rq->bufs[i + 1];
+                       } else {
+                               buf->next = buf + 1;
+                               buf++;
+                       }
+               }
+       }
+
+       rq->to_use = rq->to_clean = rq->bufs[0];
+       rq->buf_index = 0;
+
+       return 0;
+}
+
+void vnic_rq_free(struct vnic_rq *rq)
+{
+       struct vnic_dev *vdev;
+       unsigned int i;
+
+       vdev = rq->vdev;
+
+       vnic_dev_free_desc_ring(vdev, &rq->ring);
+
+       for (i = 0; i < VNIC_RQ_BUF_BLKS_MAX; i++) {
+               kfree(rq->bufs[i]);
+               rq->bufs[i] = NULL;
+       }
+
+       rq->ctrl = NULL;
+}
+
+int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
+       unsigned int desc_count, unsigned int desc_size)
+{
+       int err;
+
+       rq->index = index;
+       rq->vdev = vdev;
+
+       rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
+       if (!rq->ctrl) {
+               printk(KERN_ERR "Failed to hook RQ[%d] resource\n", index);
+               return -EINVAL;
+       }
+
+       vnic_rq_disable(rq);
+
+       err = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size);
+       if (err)
+               return err;
+
+       err = vnic_rq_alloc_bufs(rq);
+       if (err) {
+               vnic_rq_free(rq);
+               return err;
+       }
+
+       return 0;
+}
+
+void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
+       unsigned int error_interrupt_enable,
+       unsigned int error_interrupt_offset)
+{
+       u64 paddr;
+       u32 fetch_index;
+
+       paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
+       writeq(paddr, &rq->ctrl->ring_base);
+       iowrite32(rq->ring.desc_count, &rq->ctrl->ring_size);
+       iowrite32(cq_index, &rq->ctrl->cq_index);
+       iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
+       iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
+       iowrite32(0, &rq->ctrl->dropped_packet_count);
+       iowrite32(0, &rq->ctrl->error_status);
+
+       /* Use current fetch_index as the ring starting point */
+       fetch_index = ioread32(&rq->ctrl->fetch_index);
+       rq->to_use = rq->to_clean =
+               &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
+                       [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
+       iowrite32(fetch_index, &rq->ctrl->posted_index);
+
+       rq->buf_index = 0;
+}
+
+unsigned int vnic_rq_error_status(struct vnic_rq *rq)
+{
+       return ioread32(&rq->ctrl->error_status);
+}
+
+void vnic_rq_enable(struct vnic_rq *rq)
+{
+       iowrite32(1, &rq->ctrl->enable);
+}
+
+int vnic_rq_disable(struct vnic_rq *rq)
+{
+       unsigned int wait;
+
+       iowrite32(0, &rq->ctrl->enable);
+
+       /* Wait for HW to ACK disable request */
+       for (wait = 0; wait < 100; wait++) {
+               if (!(ioread32(&rq->ctrl->running)))
+                       return 0;
+               udelay(1);
+       }
+
+       printk(KERN_ERR "Failed to disable RQ[%d]\n", rq->index);
+
+       return -ETIMEDOUT;
+}
+
+void vnic_rq_clean(struct vnic_rq *rq,
+       void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf))
+{
+       struct vnic_rq_buf *buf;
+       u32 fetch_index;
+
+       BUG_ON(ioread32(&rq->ctrl->enable));
+
+       buf = rq->to_clean;
+
+       while (vnic_rq_desc_used(rq) > 0) {
+
+               (*buf_clean)(rq, buf);
+
+               buf = rq->to_clean = buf->next;
+               rq->ring.desc_avail++;
+       }
+
+       /* Use current fetch_index as the ring starting point */
+       fetch_index = ioread32(&rq->ctrl->fetch_index);
+       rq->to_use = rq->to_clean =
+               &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
+                       [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
+       iowrite32(fetch_index, &rq->ctrl->posted_index);
+
+       rq->buf_index = 0;
+
+       vnic_dev_clear_desc_ring(&rq->ring);
+}
+
diff --git a/drivers/net/enic/vnic_rq.h b/drivers/net/enic/vnic_rq.h
new file mode 100644 (file)
index 0000000..82bfca6
--- /dev/null
@@ -0,0 +1,204 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_RQ_H_
+#define _VNIC_RQ_H_
+
+#include <linux/pci.h>
+
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+/* Receive queue control */
+struct vnic_rq_ctrl {
+       u64 ring_base;                  /* 0x00 */
+       u32 ring_size;                  /* 0x08 */
+       u32 pad0;
+       u32 posted_index;               /* 0x10 */
+       u32 pad1;
+       u32 cq_index;                   /* 0x18 */
+       u32 pad2;
+       u32 enable;                     /* 0x20 */
+       u32 pad3;
+       u32 running;                    /* 0x28 */
+       u32 pad4;
+       u32 fetch_index;                /* 0x30 */
+       u32 pad5;
+       u32 error_interrupt_enable;     /* 0x38 */
+       u32 pad6;
+       u32 error_interrupt_offset;     /* 0x40 */
+       u32 pad7;
+       u32 error_status;               /* 0x48 */
+       u32 pad8;
+       u32 dropped_packet_count;       /* 0x50 */
+       u32 pad9;
+       u32 dropped_packet_count_rc;    /* 0x58 */
+       u32 pad10;
+};
+
+/* Break the vnic_rq_buf allocations into blocks of 64 entries */
+#define VNIC_RQ_BUF_BLK_ENTRIES 64
+#define VNIC_RQ_BUF_BLK_SZ \
+       (VNIC_RQ_BUF_BLK_ENTRIES * sizeof(struct vnic_rq_buf))
+#define VNIC_RQ_BUF_BLKS_NEEDED(entries) \
+       DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES)
+#define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096)
+
+struct vnic_rq_buf {
+       struct vnic_rq_buf *next;
+       dma_addr_t dma_addr;
+       void *os_buf;
+       unsigned int os_buf_index;
+       unsigned int len;
+       unsigned int index;
+       void *desc;
+};
+
+struct vnic_rq {
+       unsigned int index;
+       struct vnic_dev *vdev;
+       struct vnic_rq_ctrl __iomem *ctrl;              /* memory-mapped */
+       struct vnic_dev_ring ring;
+       struct vnic_rq_buf *bufs[VNIC_RQ_BUF_BLKS_MAX];
+       struct vnic_rq_buf *to_use;
+       struct vnic_rq_buf *to_clean;
+       void *os_buf_head;
+       unsigned int buf_index;
+       unsigned int pkts_outstanding;
+};
+
+static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
+{
+       /* how many does SW own? */
+       return rq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
+{
+       /* how many does HW own? */
+       return rq->ring.desc_count - rq->ring.desc_avail - 1;
+}
+
+static inline void *vnic_rq_next_desc(struct vnic_rq *rq)
+{
+       return rq->to_use->desc;
+}
+
+static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq)
+{
+       return rq->to_use->index;
+}
+
+static inline unsigned int vnic_rq_next_buf_index(struct vnic_rq *rq)
+{
+       return rq->buf_index++;
+}
+
+static inline void vnic_rq_post(struct vnic_rq *rq,
+       void *os_buf, unsigned int os_buf_index,
+       dma_addr_t dma_addr, unsigned int len)
+{
+       struct vnic_rq_buf *buf = rq->to_use;
+
+       buf->os_buf = os_buf;
+       buf->os_buf_index = os_buf_index;
+       buf->dma_addr = dma_addr;
+       buf->len = len;
+
+       buf = buf->next;
+       rq->to_use = buf;
+       rq->ring.desc_avail--;
+
+       /* Move the posted_index every nth descriptor
+        */
+
+#ifndef VNIC_RQ_RETURN_RATE
+#define VNIC_RQ_RETURN_RATE            0xf     /* keep 2^n - 1 */
+#endif
+
+       if ((buf->index & VNIC_RQ_RETURN_RATE) == 0)
+               iowrite32(buf->index, &rq->ctrl->posted_index);
+}
+
+static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count)
+{
+       rq->ring.desc_avail += count;
+}
+
+enum desc_return_options {
+       VNIC_RQ_RETURN_DESC,
+       VNIC_RQ_DEFER_RETURN_DESC,
+};
+
+static inline void vnic_rq_service(struct vnic_rq *rq,
+       struct cq_desc *cq_desc, u16 completed_index,
+       int desc_return, void (*buf_service)(struct vnic_rq *rq,
+       struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
+       int skipped, void *opaque), void *opaque)
+{
+       struct vnic_rq_buf *buf;
+       int skipped;
+
+       buf = rq->to_clean;
+       while (1) {
+
+               skipped = (buf->index != completed_index);
+
+               (*buf_service)(rq, cq_desc, buf, skipped, opaque);
+
+               if (desc_return == VNIC_RQ_RETURN_DESC)
+                       rq->ring.desc_avail++;
+
+               rq->to_clean = buf->next;
+
+               if (!skipped)
+                       break;
+
+               buf = rq->to_clean;
+       }
+}
+
+static inline int vnic_rq_fill(struct vnic_rq *rq,
+       int (*buf_fill)(struct vnic_rq *rq))
+{
+       int err;
+
+       while (vnic_rq_desc_avail(rq) > 1) {
+
+               err = (*buf_fill)(rq);
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}
+
+void vnic_rq_free(struct vnic_rq *rq);
+int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
+       unsigned int desc_count, unsigned int desc_size);
+void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
+       unsigned int error_interrupt_enable,
+       unsigned int error_interrupt_offset);
+unsigned int vnic_rq_error_status(struct vnic_rq *rq);
+void vnic_rq_enable(struct vnic_rq *rq);
+int vnic_rq_disable(struct vnic_rq *rq);
+void vnic_rq_clean(struct vnic_rq *rq,
+       void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf));
+
+#endif /* _VNIC_RQ_H_ */
diff --git a/drivers/net/enic/vnic_rss.h b/drivers/net/enic/vnic_rss.h
new file mode 100644 (file)
index 0000000..e325d65
--- /dev/null
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ */
+
+#ifndef _VNIC_RSS_H_
+#define _VNIC_RSS_H_
+
+/* RSS key array */
+union vnic_rss_key {
+       struct {
+               u8 b[10];
+               u8 b_pad[6];
+       } key[4];
+       u64 raw[8];
+};
+
+/* RSS cpu array */
+union vnic_rss_cpu {
+       struct {
+               u8 b[4] ;
+               u8 b_pad[4];
+       } cpu[32];
+       u64 raw[32];
+};
+
+void vnic_set_rss_key(union vnic_rss_key *rss_key, u8 *key);
+void vnic_set_rss_cpu(union vnic_rss_cpu *rss_cpu, u8 *cpu);
+void vnic_get_rss_key(union vnic_rss_key *rss_key, u8 *key);
+void vnic_get_rss_cpu(union vnic_rss_cpu *rss_cpu, u8 *cpu);
+
+#endif /* _VNIC_RSS_H_ */
diff --git a/drivers/net/enic/vnic_stats.h b/drivers/net/enic/vnic_stats.h
new file mode 100644 (file)
index 0000000..9ff9614
--- /dev/null
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_STATS_H_
+#define _VNIC_STATS_H_
+
+/* Tx statistics */
+struct vnic_tx_stats {
+       u64 tx_frames_ok;
+       u64 tx_unicast_frames_ok;
+       u64 tx_multicast_frames_ok;
+       u64 tx_broadcast_frames_ok;
+       u64 tx_bytes_ok;
+       u64 tx_unicast_bytes_ok;
+       u64 tx_multicast_bytes_ok;
+       u64 tx_broadcast_bytes_ok;
+       u64 tx_drops;
+       u64 tx_errors;
+       u64 tx_tso;
+       u64 rsvd[16];
+};
+
+/* Rx statistics */
+struct vnic_rx_stats {
+       u64 rx_frames_ok;
+       u64 rx_frames_total;
+       u64 rx_unicast_frames_ok;
+       u64 rx_multicast_frames_ok;
+       u64 rx_broadcast_frames_ok;
+       u64 rx_bytes_ok;
+       u64 rx_unicast_bytes_ok;
+       u64 rx_multicast_bytes_ok;
+       u64 rx_broadcast_bytes_ok;
+       u64 rx_drop;
+       u64 rx_no_bufs;
+       u64 rx_errors;
+       u64 rx_rss;
+       u64 rx_crc_errors;
+       u64 rx_frames_64;
+       u64 rx_frames_127;
+       u64 rx_frames_255;
+       u64 rx_frames_511;
+       u64 rx_frames_1023;
+       u64 rx_frames_1518;
+       u64 rx_frames_to_max;
+       u64 rsvd[16];
+};
+
+struct vnic_stats {
+       struct vnic_tx_stats tx;
+       struct vnic_rx_stats rx;
+};
+
+#endif /* _VNIC_STATS_H_ */
diff --git a/drivers/net/enic/vnic_wq.c b/drivers/net/enic/vnic_wq.c
new file mode 100644 (file)
index 0000000..a576d04
--- /dev/null
@@ -0,0 +1,184 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+
+static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
+{
+       struct vnic_wq_buf *buf;
+       struct vnic_dev *vdev;
+       unsigned int i, j, count = wq->ring.desc_count;
+       unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
+
+       vdev = wq->vdev;
+
+       for (i = 0; i < blks; i++) {
+               wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC);
+               if (!wq->bufs[i]) {
+                       printk(KERN_ERR "Failed to alloc wq_bufs\n");
+                       return -ENOMEM;
+               }
+       }
+
+       for (i = 0; i < blks; i++) {
+               buf = wq->bufs[i];
+               for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES; j++) {
+                       buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES + j;
+                       buf->desc = (u8 *)wq->ring.descs +
+                               wq->ring.desc_size * buf->index;
+                       if (buf->index + 1 == count) {
+                               buf->next = wq->bufs[0];
+                               break;
+                       } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES) {
+                               buf->next = wq->bufs[i + 1];
+                       } else {
+                               buf->next = buf + 1;
+                               buf++;
+                       }
+               }
+       }
+
+       wq->to_use = wq->to_clean = wq->bufs[0];
+
+       return 0;
+}
+
+void vnic_wq_free(struct vnic_wq *wq)
+{
+       struct vnic_dev *vdev;
+       unsigned int i;
+
+       vdev = wq->vdev;
+
+       vnic_dev_free_desc_ring(vdev, &wq->ring);
+
+       for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
+               kfree(wq->bufs[i]);
+               wq->bufs[i] = NULL;
+       }
+
+       wq->ctrl = NULL;
+}
+
+int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
+       unsigned int desc_count, unsigned int desc_size)
+{
+       int err;
+
+       wq->index = index;
+       wq->vdev = vdev;
+
+       wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
+       if (!wq->ctrl) {
+               printk(KERN_ERR "Failed to hook WQ[%d] resource\n", index);
+               return -EINVAL;
+       }
+
+       vnic_wq_disable(wq);
+
+       err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
+       if (err)
+               return err;
+
+       err = vnic_wq_alloc_bufs(wq);
+       if (err) {
+               vnic_wq_free(wq);
+               return err;
+       }
+
+       return 0;
+}
+
+void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
+       unsigned int error_interrupt_enable,
+       unsigned int error_interrupt_offset)
+{
+       u64 paddr;
+
+       paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
+       writeq(paddr, &wq->ctrl->ring_base);
+       iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
+       iowrite32(0, &wq->ctrl->fetch_index);
+       iowrite32(0, &wq->ctrl->posted_index);
+       iowrite32(cq_index, &wq->ctrl->cq_index);
+       iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
+       iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
+       iowrite32(0, &wq->ctrl->error_status);
+}
+
+unsigned int vnic_wq_error_status(struct vnic_wq *wq)
+{
+       return ioread32(&wq->ctrl->error_status);
+}
+
+void vnic_wq_enable(struct vnic_wq *wq)
+{
+       iowrite32(1, &wq->ctrl->enable);
+}
+
+int vnic_wq_disable(struct vnic_wq *wq)
+{
+       unsigned int wait;
+
+       iowrite32(0, &wq->ctrl->enable);
+
+       /* Wait for HW to ACK disable request */
+       for (wait = 0; wait < 100; wait++) {
+               if (!(ioread32(&wq->ctrl->running)))
+                       return 0;
+               udelay(1);
+       }
+
+       printk(KERN_ERR "Failed to disable WQ[%d]\n", wq->index);
+
+       return -ETIMEDOUT;
+}
+
+void vnic_wq_clean(struct vnic_wq *wq,
+       void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
+{
+       struct vnic_wq_buf *buf;
+
+       BUG_ON(ioread32(&wq->ctrl->enable));
+
+       buf = wq->to_clean;
+
+       while (vnic_wq_desc_used(wq) > 0) {
+
+               (*buf_clean)(wq, buf);
+
+               buf = wq->to_clean = buf->next;
+               wq->ring.desc_avail++;
+       }
+
+       wq->to_use = wq->to_clean = wq->bufs[0];
+
+       iowrite32(0, &wq->ctrl->fetch_index);
+       iowrite32(0, &wq->ctrl->posted_index);
+       iowrite32(0, &wq->ctrl->error_status);
+
+       vnic_dev_clear_desc_ring(&wq->ring);
+}
diff --git a/drivers/net/enic/vnic_wq.h b/drivers/net/enic/vnic_wq.h
new file mode 100644 (file)
index 0000000..7081828
--- /dev/null
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _VNIC_WQ_H_
+#define _VNIC_WQ_H_
+
+#include <linux/pci.h>
+
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+/* Work queue control */
+struct vnic_wq_ctrl {
+       u64 ring_base;                  /* 0x00 */
+       u32 ring_size;                  /* 0x08 */
+       u32 pad0;
+       u32 posted_index;               /* 0x10 */
+       u32 pad1;
+       u32 cq_index;                   /* 0x18 */
+       u32 pad2;
+       u32 enable;                     /* 0x20 */
+       u32 pad3;
+       u32 running;                    /* 0x28 */
+       u32 pad4;
+       u32 fetch_index;                /* 0x30 */
+       u32 pad5;
+       u32 dca_value;                  /* 0x38 */
+       u32 pad6;
+       u32 error_interrupt_enable;     /* 0x40 */
+       u32 pad7;
+       u32 error_interrupt_offset;     /* 0x48 */
+       u32 pad8;
+       u32 error_status;               /* 0x50 */
+       u32 pad9;
+};
+
+struct vnic_wq_buf {
+       struct vnic_wq_buf *next;
+       dma_addr_t dma_addr;
+       void *os_buf;
+       unsigned int len;
+       unsigned int index;
+       int sop;
+       void *desc;
+};
+
+/* Break the vnic_wq_buf allocations into blocks of 64 entries */
+#define VNIC_WQ_BUF_BLK_ENTRIES 64
+#define VNIC_WQ_BUF_BLK_SZ \
+       (VNIC_WQ_BUF_BLK_ENTRIES * sizeof(struct vnic_wq_buf))
+#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \
+       DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES)
+#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096)
+
+struct vnic_wq {
+       unsigned int index;
+       struct vnic_dev *vdev;
+       struct vnic_wq_ctrl __iomem *ctrl;              /* memory-mapped */
+       struct vnic_dev_ring ring;
+       struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX];
+       struct vnic_wq_buf *to_use;
+       struct vnic_wq_buf *to_clean;
+       unsigned int pkts_outstanding;
+};
+
+static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq)
+{
+       /* how many does SW own? */
+       return wq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_wq_desc_used(struct vnic_wq *wq)
+{
+       /* how many does HW own? */
+       return wq->ring.desc_count - wq->ring.desc_avail - 1;
+}
+
+static inline void *vnic_wq_next_desc(struct vnic_wq *wq)
+{
+       return wq->to_use->desc;
+}
+
+static inline void vnic_wq_post(struct vnic_wq *wq,
+       void *os_buf, dma_addr_t dma_addr,
+       unsigned int len, int sop, int eop)
+{
+       struct vnic_wq_buf *buf = wq->to_use;
+
+       buf->sop = sop;
+       buf->os_buf = eop ? os_buf : NULL;
+       buf->dma_addr = dma_addr;
+       buf->len = len;
+
+       buf = buf->next;
+       if (eop)
+               iowrite32(buf->index, &wq->ctrl->posted_index);
+       wq->to_use = buf;
+
+       wq->ring.desc_avail--;
+}
+
+static inline void vnic_wq_service(struct vnic_wq *wq,
+       struct cq_desc *cq_desc, u16 completed_index,
+       void (*buf_service)(struct vnic_wq *wq,
+       struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque),
+       void *opaque)
+{
+       struct vnic_wq_buf *buf;
+
+       buf = wq->to_clean;
+       while (1) {
+
+               (*buf_service)(wq, cq_desc, buf, opaque);
+
+               wq->ring.desc_avail++;
+
+               wq->to_clean = buf->next;
+
+               if (buf->index == completed_index)
+                       break;
+
+               buf = wq->to_clean;
+       }
+}
+
+void vnic_wq_free(struct vnic_wq *wq);
+int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
+       unsigned int desc_count, unsigned int desc_size);
+void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
+       unsigned int error_interrupt_enable,
+       unsigned int error_interrupt_offset);
+unsigned int vnic_wq_error_status(struct vnic_wq *wq);
+void vnic_wq_enable(struct vnic_wq *wq);
+int vnic_wq_disable(struct vnic_wq *wq);
+void vnic_wq_clean(struct vnic_wq *wq,
+       void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf));
+
+#endif /* _VNIC_WQ_H_ */
diff --git a/drivers/net/enic/wq_enet_desc.h b/drivers/net/enic/wq_enet_desc.h
new file mode 100644 (file)
index 0000000..483596c
--- /dev/null
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef _WQ_ENET_DESC_H_
+#define _WQ_ENET_DESC_H_
+
+/* Ethernet work queue descriptor: 16B */
+struct wq_enet_desc {
+       __le64 address;
+       __le16 length;
+       __le16 mss_loopback;
+       __le16 header_length_flags;
+       __le16 vlan_tag;
+};
+
+#define WQ_ENET_ADDR_BITS              64
+#define WQ_ENET_LEN_BITS               14
+#define WQ_ENET_LEN_MASK               ((1 << WQ_ENET_LEN_BITS) - 1)
+#define WQ_ENET_MSS_BITS               14
+#define WQ_ENET_MSS_MASK               ((1 << WQ_ENET_MSS_BITS) - 1)
+#define WQ_ENET_MSS_SHIFT              2
+#define WQ_ENET_LOOPBACK_SHIFT         1
+#define WQ_ENET_HDRLEN_BITS            10
+#define WQ_ENET_HDRLEN_MASK            ((1 << WQ_ENET_HDRLEN_BITS) - 1)
+#define WQ_ENET_FLAGS_OM_BITS          2
+#define WQ_ENET_FLAGS_OM_MASK          ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
+#define WQ_ENET_FLAGS_EOP_SHIFT                12
+#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT   13
+#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
+#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT    15
+
+#define WQ_ENET_OFFLOAD_MODE_CSUM      0
+#define WQ_ENET_OFFLOAD_MODE_RESERVED  1
+#define WQ_ENET_OFFLOAD_MODE_CSUM_L4   2
+#define WQ_ENET_OFFLOAD_MODE_TSO       3
+
+static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
+       u64 address, u16 length, u16 mss, u16 header_length,
+       u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
+       u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
+{
+       desc->address = cpu_to_le64(address);
+       desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
+       desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
+               WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
+       desc->header_length_flags = cpu_to_le16(
+               (header_length & WQ_ENET_HDRLEN_MASK) |
+               (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
+               (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
+               (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
+               (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
+               (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
+       desc->vlan_tag = cpu_to_le16(vlan_tag);
+}
+
+static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
+       u64 *address, u16 *length, u16 *mss, u16 *header_length,
+       u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
+       u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
+{
+       *address = le64_to_cpu(desc->address);
+       *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
+       *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
+               WQ_ENET_MSS_MASK;
+       *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
+               WQ_ENET_LOOPBACK_SHIFT) & 1);
+       *header_length = le16_to_cpu(desc->header_length_flags) &
+               WQ_ENET_HDRLEN_MASK;
+       *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
+               WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
+       *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
+               WQ_ENET_FLAGS_EOP_SHIFT) & 1);
+       *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
+               WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
+       *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
+               WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
+       *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
+               WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
+       *vlan_tag = le16_to_cpu(desc->vlan_tag);
+}
+
+#endif /* _WQ_ENET_DESC_H_ */
index 90a132a..6f4276d 100644 (file)
 #define PCI_DEVICE_ID_EICON_MAESTRAQ_U 0xe013
 #define PCI_DEVICE_ID_EICON_MAESTRAP   0xe014
 
+#define PCI_VENDOR_ID_CISCO            0x1137
+
 #define PCI_VENDOR_ID_ZIATECH          0x1138
 #define PCI_DEVICE_ID_ZIATECH_5550_HC  0x5550