RDMA/nes: Enhanced PFT management scheme
Vadim Makhervaks [Fri, 3 Oct 2008 19:21:18 +0000 (12:21 -0700)]
Change management of perfect filter table to allow enhanced
performance applications.

Signed-off-by: Vadim Makhervaks <vmakhervaks@neteffect.com>
Signed-off-by: Sweta Bhatt <sweta.bhatt@einfochips.com>
Signed-off-by: Chien Tung <ctung@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/nes/nes_hw.c
drivers/infiniband/hw/nes/nes_hw.h
drivers/infiniband/hw/nes/nes_nic.c

index 5e13c26..eca3520 100644 (file)
@@ -363,6 +363,9 @@ struct nes_adapter *nes_init_adapter(struct nes_device *nesdev, u8 hw_rev) {
        }
        nes_init_csr_ne020(nesdev, hw_rev, port_count);
 
+       memset(nesadapter->pft_mcast_map, 255,
+              sizeof nesadapter->pft_mcast_map);
+
        /* populate the new nesadapter */
        nesadapter->devfn = nesdev->pcidev->devfn;
        nesadapter->bus_number = nesdev->pcidev->bus->number;
index 1b93c57..610b9d8 100644 (file)
@@ -968,6 +968,7 @@ struct nes_arp_entry {
 #define DEFAULT_JUMBO_NES_QL_TARGET 40
 #define DEFAULT_JUMBO_NES_QL_HIGH   128
 #define NES_NIC_CQ_DOWNWARD_TREND   16
+#define NES_PFT_SIZE               48
 
 struct nes_hw_tune_timer {
     /* u16 cq_count; */
@@ -1117,6 +1118,7 @@ struct nes_adapter {
        u8            virtwq;
        u8            et_use_adaptive_rx_coalesce;
        u8            adapter_fcn_count;
+       u8 pft_mcast_map[NES_PFT_SIZE];
 };
 
 struct nes_pbl {
index 639d0fc..7303586 100644 (file)
@@ -91,6 +91,7 @@ static struct nic_qp_map *nic_qp_mapping_per_function[] = {
 static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK
                | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN;
 static int debug = -1;
+static int nics_per_function = 1;
 
 /**
  * nes_netdev_poll
@@ -201,7 +202,8 @@ static int nes_netdev_open(struct net_device *netdev)
                nes_debug(NES_DBG_NETDEV, "i=%d, perfect filter table index= %d, PERF FILTER LOW"
                                " (Addr:%08X) = %08X, HIGH = %08X.\n",
                                i, nesvnic->qp_nic_index[i],
-                               NES_IDX_PERFECT_FILTER_LOW+((nesvnic->perfect_filter_index + i) * 8),
+                               NES_IDX_PERFECT_FILTER_LOW+
+                                       (nesvnic->qp_nic_index[i] * 8),
                                macaddr_low,
                                (u32)macaddr_high | NES_MAC_ADDR_VALID |
                                ((((u32)nesvnic->nic_index) << 16)));
@@ -833,6 +835,7 @@ static void nes_netdev_set_multicast_list(struct net_device *netdev)
 {
        struct nes_vnic *nesvnic = netdev_priv(netdev);
        struct nes_device *nesdev = nesvnic->nesdev;
+       struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
        struct dev_mc_list *multicast_addr;
        u32 nic_active_bit;
        u32 nic_active;
@@ -842,7 +845,12 @@ static void nes_netdev_set_multicast_list(struct net_device *netdev)
        u8 mc_all_on = 0;
        u8 mc_index;
        int mc_nic_index = -1;
+       u8 pft_entries_preallocated = max(nesadapter->adapter_fcn_count *
+                                       nics_per_function, 4);
+       u8 max_pft_entries_avaiable = NES_PFT_SIZE - pft_entries_preallocated;
+       unsigned long flags;
 
+       spin_lock_irqsave(&nesadapter->resource_lock, flags);
        nic_active_bit = 1 << nesvnic->nic_index;
 
        if (netdev->flags & IFF_PROMISC) {
@@ -853,7 +861,7 @@ static void nes_netdev_set_multicast_list(struct net_device *netdev)
                nic_active |= nic_active_bit;
                nes_write_indexed(nesdev, NES_IDX_NIC_UNICAST_ALL, nic_active);
                mc_all_on = 1;
-       } else if ((netdev->flags & IFF_ALLMULTI) || (netdev->mc_count > NES_MULTICAST_PF_MAX) ||
+       } else if ((netdev->flags & IFF_ALLMULTI) ||
                           (nesvnic->nic_index > 3)) {
                nic_active = nes_read_indexed(nesdev, NES_IDX_NIC_MULTICAST_ALL);
                nic_active |= nic_active_bit;
@@ -872,17 +880,34 @@ static void nes_netdev_set_multicast_list(struct net_device *netdev)
        }
 
        nes_debug(NES_DBG_NIC_RX, "Number of MC entries = %d, Promiscous = %d, All Multicast = %d.\n",
-                         netdev->mc_count, (netdev->flags & IFF_PROMISC)?1:0,
-                         (netdev->flags & IFF_ALLMULTI)?1:0);
+                 netdev->mc_count, !!(netdev->flags & IFF_PROMISC),
+                 !!(netdev->flags & IFF_ALLMULTI));
        if (!mc_all_on) {
                multicast_addr = netdev->mc_list;
-               perfect_filter_register_address = NES_IDX_PERFECT_FILTER_LOW + 0x80;
-               perfect_filter_register_address += nesvnic->nic_index*0x40;
-               for (mc_index=0; mc_index < NES_MULTICAST_PF_MAX; mc_index++) {
-                       while (multicast_addr && nesvnic->mcrq_mcast_filter && ((mc_nic_index = nesvnic->mcrq_mcast_filter(nesvnic, multicast_addr->dmi_addr)) == 0))
+               perfect_filter_register_address = NES_IDX_PERFECT_FILTER_LOW +
+                                               pft_entries_preallocated * 0x8;
+               for (mc_index = 0; mc_index < max_pft_entries_avaiable;
+               mc_index++) {
+                       while (multicast_addr && nesvnic->mcrq_mcast_filter &&
+                       ((mc_nic_index = nesvnic->mcrq_mcast_filter(nesvnic,
+                                       multicast_addr->dmi_addr)) == 0)) {
                                multicast_addr = multicast_addr->next;
+                       }
                        if (mc_nic_index < 0)
                                mc_nic_index = nesvnic->nic_index;
+                       while (nesadapter->pft_mcast_map[mc_index] < 16 &&
+                               nesadapter->pft_mcast_map[mc_index] !=
+                                       nesvnic->nic_index &&
+                                       mc_index < max_pft_entries_avaiable) {
+                                               nes_debug(NES_DBG_NIC_RX,
+                                       "mc_index=%d skipping nic_index=%d,\
+                                       used for=%d \n", mc_index,
+                                       nesvnic->nic_index,
+                                       nesadapter->pft_mcast_map[mc_index]);
+                               mc_index++;
+                       }
+                       if (mc_index >= max_pft_entries_avaiable)
+                               break;
                        if (multicast_addr) {
                                DECLARE_MAC_BUF(mac);
                                nes_debug(NES_DBG_NIC_RX, "Assigning MC Address %s to register 0x%04X nic_idx=%d\n",
@@ -903,15 +928,33 @@ static void nes_netdev_set_multicast_list(struct net_device *netdev)
                                                (u32)macaddr_high | NES_MAC_ADDR_VALID |
                                                ((((u32)(1<<mc_nic_index)) << 16)));
                                multicast_addr = multicast_addr->next;
+                               nesadapter->pft_mcast_map[mc_index] =
+                                                       nesvnic->nic_index;
                        } else {
                                nes_debug(NES_DBG_NIC_RX, "Clearing MC Address at register 0x%04X\n",
                                                  perfect_filter_register_address+(mc_index * 8));
                                nes_write_indexed(nesdev,
                                                perfect_filter_register_address+4+(mc_index * 8),
                                                0);
+                               nesadapter->pft_mcast_map[mc_index] = 255;
                        }
                }
+               /* PFT is not large enough */
+               if (multicast_addr && multicast_addr->next) {
+                       nic_active = nes_read_indexed(nesdev,
+                                               NES_IDX_NIC_MULTICAST_ALL);
+                       nic_active |= nic_active_bit;
+                       nes_write_indexed(nesdev, NES_IDX_NIC_MULTICAST_ALL,
+                                                               nic_active);
+                       nic_active = nes_read_indexed(nesdev,
+                                               NES_IDX_NIC_UNICAST_ALL);
+                       nic_active &= ~nic_active_bit;
+                       nes_write_indexed(nesdev, NES_IDX_NIC_UNICAST_ALL,
+                                                               nic_active);
+               }
        }
+
+       spin_unlock_irqrestore(&nesadapter->resource_lock, flags);
 }
 
 
@@ -1615,7 +1658,9 @@ struct net_device *nes_netdev_init(struct nes_device *nesdev,
                        nesvnic, (unsigned long)netdev->features, nesvnic->nic.qp_id,
                        nesvnic->nic_index, nesvnic->logical_port,  nesdev->mac_index);
 
-       if (nesvnic->nesdev->nesadapter->port_count == 1) {
+       if (nesvnic->nesdev->nesadapter->port_count == 1 &&
+               nesvnic->nesdev->nesadapter->adapter_fcn_count == 1) {
+
                nesvnic->qp_nic_index[0] = nesvnic->nic_index;
                nesvnic->qp_nic_index[1] = nesvnic->nic_index + 1;
                if (nes_drv_opt & NES_DRV_OPT_DUAL_LOGICAL_PORT) {
@@ -1626,11 +1671,14 @@ struct net_device *nes_netdev_init(struct nes_device *nesdev,
                        nesvnic->qp_nic_index[3] = nesvnic->nic_index + 3;
                }
        } else {
-               if (nesvnic->nesdev->nesadapter->port_count == 2) {
-                       nesvnic->qp_nic_index[0] = nesvnic->nic_index;
-                       nesvnic->qp_nic_index[1] = nesvnic->nic_index + 2;
-                       nesvnic->qp_nic_index[2] = 0xf;
-                       nesvnic->qp_nic_index[3] = 0xf;
+               if (nesvnic->nesdev->nesadapter->port_count == 2 ||
+                       (nesvnic->nesdev->nesadapter->port_count == 1 &&
+                       nesvnic->nesdev->nesadapter->adapter_fcn_count == 2)) {
+                               nesvnic->qp_nic_index[0] = nesvnic->nic_index;
+                               nesvnic->qp_nic_index[1] = nesvnic->nic_index
+                                                                       + 2;
+                               nesvnic->qp_nic_index[2] = 0xf;
+                               nesvnic->qp_nic_index[3] = 0xf;
                } else {
                        nesvnic->qp_nic_index[0] = nesvnic->nic_index;
                        nesvnic->qp_nic_index[1] = 0xf;