MIPS: Cavium: Add CPU hotplugging code.
[linux-2.6.git] / drivers / staging / octeon / ethernet-common.c
1 /**********************************************************************
2  * Author: Cavium Networks
3  *
4  * Contact: support@caviumnetworks.com
5  * This file is part of the OCTEON SDK
6  *
7  * Copyright (c) 2003-2007 Cavium Networks
8  *
9  * This file is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License, Version 2, as
11  * published by the Free Software Foundation.
12  *
13  * This file is distributed in the hope that it will be useful, but
14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16  * NONINFRINGEMENT.  See the GNU General Public License for more
17  * details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this file; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22  * or visit http://www.gnu.org/licenses/.
23  *
24  * This file may also be available under a different license from Cavium.
25  * Contact Cavium Networks for more information
26 **********************************************************************/
27 #include <linux/kernel.h>
28 #include <linux/mii.h>
29 #include <net/dst.h>
30
31 #include <asm/atomic.h>
32 #include <asm/octeon/octeon.h>
33
34 #include "ethernet-defines.h"
35 #include "ethernet-tx.h"
36 #include "ethernet-mdio.h"
37 #include "ethernet-util.h"
38 #include "octeon-ethernet.h"
39 #include "ethernet-common.h"
40
41 #include "cvmx-pip.h"
42 #include "cvmx-pko.h"
43 #include "cvmx-fau.h"
44 #include "cvmx-helper.h"
45
46 #include "cvmx-gmxx-defs.h"
47
48 /**
49  * Get the low level ethernet statistics
50  *
51  * @dev:    Device to get the statistics from
52  * Returns Pointer to the statistics
53  */
54 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
55 {
56         cvmx_pip_port_status_t rx_status;
57         cvmx_pko_port_status_t tx_status;
58         struct octeon_ethernet *priv = netdev_priv(dev);
59
60         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
61                 if (octeon_is_simulation()) {
62                         /* The simulator doesn't support statistics */
63                         memset(&rx_status, 0, sizeof(rx_status));
64                         memset(&tx_status, 0, sizeof(tx_status));
65                 } else {
66                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
67                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
68                 }
69
70                 priv->stats.rx_packets += rx_status.inb_packets;
71                 priv->stats.tx_packets += tx_status.packets;
72                 priv->stats.rx_bytes += rx_status.inb_octets;
73                 priv->stats.tx_bytes += tx_status.octets;
74                 priv->stats.multicast += rx_status.multicast_packets;
75                 priv->stats.rx_crc_errors += rx_status.inb_errors;
76                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
77
78                 /*
79                  * The drop counter must be incremented atomically
80                  * since the RX tasklet also increments it.
81                  */
82 #ifdef CONFIG_64BIT
83                 atomic64_add(rx_status.dropped_packets,
84                              (atomic64_t *)&priv->stats.rx_dropped);
85 #else
86                 atomic_add(rx_status.dropped_packets,
87                              (atomic_t *)&priv->stats.rx_dropped);
88 #endif
89         }
90
91         return &priv->stats;
92 }
93
94 /**
95  * Set the multicast list. Currently unimplemented.
96  *
97  * @dev:    Device to work on
98  */
99 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
100 {
101         union cvmx_gmxx_prtx_cfg gmx_cfg;
102         struct octeon_ethernet *priv = netdev_priv(dev);
103         int interface = INTERFACE(priv->port);
104         int index = INDEX(priv->port);
105
106         if ((interface < 2)
107             && (cvmx_helper_interface_get_mode(interface) !=
108                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
109                 union cvmx_gmxx_rxx_adr_ctl control;
110                 control.u64 = 0;
111                 control.s.bcst = 1;     /* Allow broadcast MAC addresses */
112
113                 if (dev->mc_list || (dev->flags & IFF_ALLMULTI) ||
114                     (dev->flags & IFF_PROMISC))
115                         /* Force accept multicast packets */
116                         control.s.mcst = 2;
117                 else
118                         /* Force reject multicat packets */
119                         control.s.mcst = 1;
120
121                 if (dev->flags & IFF_PROMISC)
122                         /*
123                          * Reject matches if promisc. Since CAM is
124                          * shut off, should accept everything.
125                          */
126                         control.s.cam_mode = 0;
127                 else
128                         /* Filter packets based on the CAM */
129                         control.s.cam_mode = 1;
130
131                 gmx_cfg.u64 =
132                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
133                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
134                                gmx_cfg.u64 & ~1ull);
135
136                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface),
137                                control.u64);
138                 if (dev->flags & IFF_PROMISC)
139                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
140                                        (index, interface), 0);
141                 else
142                         cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN
143                                        (index, interface), 1);
144
145                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
146                                gmx_cfg.u64);
147         }
148 }
149
150 /**
151  * Set the hardware MAC address for a device
152  *
153  * @dev:    Device to change the MAC address for
154  * @addr:   Address structure to change it too. MAC address is addr + 2.
155  * Returns Zero on success
156  */
157 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
158 {
159         struct octeon_ethernet *priv = netdev_priv(dev);
160         union cvmx_gmxx_prtx_cfg gmx_cfg;
161         int interface = INTERFACE(priv->port);
162         int index = INDEX(priv->port);
163
164         memcpy(dev->dev_addr, addr + 2, 6);
165
166         if ((interface < 2)
167             && (cvmx_helper_interface_get_mode(interface) !=
168                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
169                 int i;
170                 uint8_t *ptr = addr;
171                 uint64_t mac = 0;
172                 for (i = 0; i < 6; i++)
173                         mac = (mac << 8) | (uint64_t) (ptr[i + 2]);
174
175                 gmx_cfg.u64 =
176                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
177                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
178                                gmx_cfg.u64 & ~1ull);
179
180                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
181                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
182                                ptr[2]);
183                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
184                                ptr[3]);
185                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
186                                ptr[4]);
187                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
188                                ptr[5]);
189                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
190                                ptr[6]);
191                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
192                                ptr[7]);
193                 cvm_oct_common_set_multicast_list(dev);
194                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
195                                gmx_cfg.u64);
196         }
197         return 0;
198 }
199
200 /**
201  * Change the link MTU. Unimplemented
202  *
203  * @dev:     Device to change
204  * @new_mtu: The new MTU
205  *
206  * Returns Zero on success
207  */
208 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
209 {
210         struct octeon_ethernet *priv = netdev_priv(dev);
211         int interface = INTERFACE(priv->port);
212         int index = INDEX(priv->port);
213 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
214         int vlan_bytes = 4;
215 #else
216         int vlan_bytes = 0;
217 #endif
218
219         /*
220          * Limit the MTU to make sure the ethernet packets are between
221          * 64 bytes and 65535 bytes.
222          */
223         if ((new_mtu + 14 + 4 + vlan_bytes < 64)
224             || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
225                 pr_err("MTU must be between %d and %d.\n",
226                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
227                 return -EINVAL;
228         }
229         dev->mtu = new_mtu;
230
231         if ((interface < 2)
232             && (cvmx_helper_interface_get_mode(interface) !=
233                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
234                 /* Add ethernet header and FCS, and VLAN if configured. */
235                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
236
237                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
238                     || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
239                         /* Signal errors on packets larger than the MTU */
240                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
241                                        max_packet);
242                 } else {
243                         /*
244                          * Set the hardware to truncate packets larger
245                          * than the MTU and smaller the 64 bytes.
246                          */
247                         union cvmx_pip_frm_len_chkx frm_len_chk;
248                         frm_len_chk.u64 = 0;
249                         frm_len_chk.s.minlen = 64;
250                         frm_len_chk.s.maxlen = max_packet;
251                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
252                                        frm_len_chk.u64);
253                 }
254                 /*
255                  * Set the hardware to truncate packets larger than
256                  * the MTU. The jabber register must be set to a
257                  * multiple of 8 bytes, so round up.
258                  */
259                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
260                                (max_packet + 7) & ~7u);
261         }
262         return 0;
263 }
264
265 /**
266  * Per network device initialization
267  *
268  * @dev:    Device to initialize
269  * Returns Zero on success
270  */
271 int cvm_oct_common_init(struct net_device *dev)
272 {
273         static int count;
274         char mac[8] = { 0x00, 0x00,
275                 octeon_bootinfo->mac_addr_base[0],
276                 octeon_bootinfo->mac_addr_base[1],
277                 octeon_bootinfo->mac_addr_base[2],
278                 octeon_bootinfo->mac_addr_base[3],
279                 octeon_bootinfo->mac_addr_base[4],
280                 octeon_bootinfo->mac_addr_base[5] + count
281         };
282         struct octeon_ethernet *priv = netdev_priv(dev);
283
284         /*
285          * Force the interface to use the POW send if always_use_pow
286          * was specified or it is in the pow send list.
287          */
288         if ((pow_send_group != -1)
289             && (always_use_pow || strstr(pow_send_list, dev->name)))
290                 priv->queue = -1;
291
292         if (priv->queue != -1) {
293                 dev->hard_start_xmit = cvm_oct_xmit;
294                 if (USE_HW_TCPUDP_CHECKSUM)
295                         dev->features |= NETIF_F_IP_CSUM;
296         } else
297                 dev->hard_start_xmit = cvm_oct_xmit_pow;
298         count++;
299
300         dev->get_stats = cvm_oct_common_get_stats;
301         dev->set_mac_address = cvm_oct_common_set_mac_address;
302         dev->set_multicast_list = cvm_oct_common_set_multicast_list;
303         dev->change_mtu = cvm_oct_common_change_mtu;
304         dev->do_ioctl = cvm_oct_ioctl;
305         /* We do our own locking, Linux doesn't need to */
306         dev->features |= NETIF_F_LLTX;
307         SET_ETHTOOL_OPS(dev, &cvm_oct_ethtool_ops);
308 #ifdef CONFIG_NET_POLL_CONTROLLER
309         dev->poll_controller = cvm_oct_poll_controller;
310 #endif
311
312         cvm_oct_mdio_setup_device(dev);
313         dev->set_mac_address(dev, mac);
314         dev->change_mtu(dev, dev->mtu);
315
316         /*
317          * Zero out stats for port so we won't mistakenly show
318          * counters from the bootloader.
319          */
320         memset(dev->get_stats(dev), 0, sizeof(struct net_device_stats));
321
322         return 0;
323 }
324
325 void cvm_oct_common_uninit(struct net_device *dev)
326 {
327         /* Currently nothing to do */
328 }