Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1 | /* |
Kou Ishizaki | 3342cf0 | 2007-02-20 16:36:14 -0600 | [diff] [blame] | 2 | * Network device driver for Cell Processor-Based Blade and Celleb platform |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 3 | * |
| 4 | * (C) Copyright IBM Corp. 2005 |
Kou Ishizaki | 3342cf0 | 2007-02-20 16:36:14 -0600 | [diff] [blame] | 5 | * (C) Copyright 2006 TOSHIBA CORPORATION |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 6 | * |
| 7 | * Authors : Utz Bacher <utz.bacher@de.ibm.com> |
| 8 | * Jens Osterkamp <Jens.Osterkamp@de.ibm.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2, or (at your option) |
| 13 | * any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | */ |
| 24 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 25 | #include <linux/compiler.h> |
| 26 | #include <linux/crc32.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/etherdevice.h> |
| 29 | #include <linux/ethtool.h> |
| 30 | #include <linux/firmware.h> |
| 31 | #include <linux/if_vlan.h> |
Arnd Bergmann | 7c5c220 | 2006-01-12 17:16:45 -0500 | [diff] [blame] | 32 | #include <linux/in.h> |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 33 | #include <linux/init.h> |
| 34 | #include <linux/ioport.h> |
| 35 | #include <linux/ip.h> |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/mii.h> |
| 38 | #include <linux/module.h> |
| 39 | #include <linux/netdevice.h> |
| 40 | #include <linux/device.h> |
| 41 | #include <linux/pci.h> |
| 42 | #include <linux/skbuff.h> |
| 43 | #include <linux/slab.h> |
| 44 | #include <linux/tcp.h> |
| 45 | #include <linux/types.h> |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 46 | #include <linux/vmalloc.h> |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 47 | #include <linux/wait.h> |
| 48 | #include <linux/workqueue.h> |
Jiri Slaby | 1977f03 | 2007-10-18 23:40:25 -0700 | [diff] [blame] | 49 | #include <linux/bitops.h> |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 50 | #include <asm/pci-bridge.h> |
| 51 | #include <net/checksum.h> |
| 52 | |
| 53 | #include "spider_net.h" |
| 54 | |
| 55 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ |
| 56 | "<Jens.Osterkamp@de.ibm.com>"); |
| 57 | MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); |
| 58 | MODULE_LICENSE("GPL"); |
Linas Vepstas | 90f1084 | 2006-10-10 15:56:04 -0500 | [diff] [blame] | 59 | MODULE_VERSION(VERSION); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 60 | |
| 61 | static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; |
| 62 | static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; |
| 63 | |
Linas Vepstas | e2874f2 | 2006-10-10 15:59:02 -0500 | [diff] [blame] | 64 | module_param(rx_descriptors, int, 0444); |
| 65 | module_param(tx_descriptors, int, 0444); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 66 | |
| 67 | MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ |
| 68 | "in rx chains"); |
| 69 | MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ |
| 70 | "in tx chain"); |
| 71 | |
| 72 | char spider_net_driver_name[] = "spidernet"; |
| 73 | |
| 74 | static struct pci_device_id spider_net_pci_tbl[] = { |
| 75 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, |
| 76 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
| 77 | { 0, } |
| 78 | }; |
| 79 | |
| 80 | MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); |
| 81 | |
| 82 | /** |
| 83 | * spider_net_read_reg - reads an SMMIO register of a card |
| 84 | * @card: device structure |
| 85 | * @reg: register to read from |
| 86 | * |
| 87 | * returns the content of the specified SMMIO register. |
| 88 | */ |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 89 | static inline u32 |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 90 | spider_net_read_reg(struct spider_net_card *card, u32 reg) |
| 91 | { |
Benjamin Herrenschmidt | 3bc0f40 | 2006-11-11 17:25:13 +1100 | [diff] [blame] | 92 | /* We use the powerpc specific variants instead of readl_be() because |
| 93 | * we know spidernet is not a real PCI device and we can thus avoid the |
| 94 | * performance hit caused by the PCI workarounds. |
| 95 | */ |
| 96 | return in_be32(card->regs + reg); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | /** |
| 100 | * spider_net_write_reg - writes to an SMMIO register of a card |
| 101 | * @card: device structure |
| 102 | * @reg: register to write to |
| 103 | * @value: value to write into the specified SMMIO register |
| 104 | */ |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 105 | static inline void |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 106 | spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) |
| 107 | { |
Benjamin Herrenschmidt | 3bc0f40 | 2006-11-11 17:25:13 +1100 | [diff] [blame] | 108 | /* We use the powerpc specific variants instead of writel_be() because |
| 109 | * we know spidernet is not a real PCI device and we can thus avoid the |
| 110 | * performance hit caused by the PCI workarounds. |
| 111 | */ |
| 112 | out_be32(card->regs + reg, value); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 113 | } |
| 114 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 115 | /** spider_net_write_phy - write to phy register |
| 116 | * @netdev: adapter to be written to |
| 117 | * @mii_id: id of MII |
| 118 | * @reg: PHY register |
| 119 | * @val: value to be written to phy register |
| 120 | * |
| 121 | * spider_net_write_phy_register writes to an arbitrary PHY |
| 122 | * register via the spider GPCWOPCMD register. We assume the queue does |
| 123 | * not run full (not more than 15 commands outstanding). |
| 124 | **/ |
| 125 | static void |
| 126 | spider_net_write_phy(struct net_device *netdev, int mii_id, |
| 127 | int reg, int val) |
| 128 | { |
| 129 | struct spider_net_card *card = netdev_priv(netdev); |
| 130 | u32 writevalue; |
| 131 | |
| 132 | writevalue = ((u32)mii_id << 21) | |
| 133 | ((u32)reg << 16) | ((u32)val); |
| 134 | |
| 135 | spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); |
| 136 | } |
| 137 | |
| 138 | /** spider_net_read_phy - read from phy register |
| 139 | * @netdev: network device to be read from |
| 140 | * @mii_id: id of MII |
| 141 | * @reg: PHY register |
| 142 | * |
| 143 | * Returns value read from PHY register |
| 144 | * |
| 145 | * spider_net_write_phy reads from an arbitrary PHY |
| 146 | * register via the spider GPCROPCMD register |
| 147 | **/ |
| 148 | static int |
| 149 | spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) |
| 150 | { |
| 151 | struct spider_net_card *card = netdev_priv(netdev); |
| 152 | u32 readvalue; |
| 153 | |
| 154 | readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); |
| 155 | spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); |
| 156 | |
| 157 | /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT |
| 158 | * interrupt, as we poll for the completion of the read operation |
| 159 | * in spider_net_read_phy. Should take about 50 us */ |
| 160 | do { |
| 161 | readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); |
| 162 | } while (readvalue & SPIDER_NET_GPREXEC); |
| 163 | |
| 164 | readvalue &= SPIDER_NET_GPRDAT_MASK; |
| 165 | |
| 166 | return readvalue; |
| 167 | } |
| 168 | |
| 169 | /** |
Kou Ishizaki | abdb66b | 2007-02-20 16:33:41 -0600 | [diff] [blame] | 170 | * spider_net_setup_aneg - initial auto-negotiation setup |
| 171 | * @card: device structure |
| 172 | **/ |
| 173 | static void |
| 174 | spider_net_setup_aneg(struct spider_net_card *card) |
| 175 | { |
| 176 | struct mii_phy *phy = &card->phy; |
| 177 | u32 advertise = 0; |
Ishizaki Kou | a1c38a4 | 2007-05-10 12:18:48 -0500 | [diff] [blame] | 178 | u16 bmsr, estat; |
Kou Ishizaki | abdb66b | 2007-02-20 16:33:41 -0600 | [diff] [blame] | 179 | |
Ishizaki Kou | a1c38a4 | 2007-05-10 12:18:48 -0500 | [diff] [blame] | 180 | bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); |
| 181 | estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); |
Kou Ishizaki | abdb66b | 2007-02-20 16:33:41 -0600 | [diff] [blame] | 182 | |
| 183 | if (bmsr & BMSR_10HALF) |
| 184 | advertise |= ADVERTISED_10baseT_Half; |
| 185 | if (bmsr & BMSR_10FULL) |
| 186 | advertise |= ADVERTISED_10baseT_Full; |
| 187 | if (bmsr & BMSR_100HALF) |
| 188 | advertise |= ADVERTISED_100baseT_Half; |
| 189 | if (bmsr & BMSR_100FULL) |
| 190 | advertise |= ADVERTISED_100baseT_Full; |
| 191 | |
| 192 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) |
| 193 | advertise |= SUPPORTED_1000baseT_Full; |
| 194 | if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) |
| 195 | advertise |= SUPPORTED_1000baseT_Half; |
| 196 | |
| 197 | mii_phy_probe(phy, phy->mii_id); |
| 198 | phy->def->ops->setup_aneg(phy, advertise); |
| 199 | |
| 200 | } |
| 201 | |
| 202 | /** |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 203 | * spider_net_rx_irq_off - switch off rx irq on this spider card |
| 204 | * @card: device structure |
| 205 | * |
| 206 | * switches off rx irq by masking them out in the GHIINTnMSK register |
| 207 | */ |
| 208 | static void |
| 209 | spider_net_rx_irq_off(struct spider_net_card *card) |
| 210 | { |
| 211 | u32 regvalue; |
| 212 | |
| 213 | regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); |
| 214 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); |
| 215 | } |
| 216 | |
| 217 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 218 | * spider_net_rx_irq_on - switch on rx irq on this spider card |
| 219 | * @card: device structure |
| 220 | * |
| 221 | * switches on rx irq by enabling them in the GHIINTnMSK register |
| 222 | */ |
| 223 | static void |
| 224 | spider_net_rx_irq_on(struct spider_net_card *card) |
| 225 | { |
| 226 | u32 regvalue; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 227 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 228 | regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; |
| 229 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | /** |
| 233 | * spider_net_set_promisc - sets the unicast address or the promiscuous mode |
| 234 | * @card: card structure |
| 235 | * |
| 236 | * spider_net_set_promisc sets the unicast destination address filter and |
| 237 | * thus either allows for non-promisc mode or promisc mode |
| 238 | */ |
| 239 | static void |
| 240 | spider_net_set_promisc(struct spider_net_card *card) |
| 241 | { |
| 242 | u32 macu, macl; |
| 243 | struct net_device *netdev = card->netdev; |
| 244 | |
| 245 | if (netdev->flags & IFF_PROMISC) { |
| 246 | /* clear destination entry 0 */ |
| 247 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0); |
| 248 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0); |
| 249 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, |
| 250 | SPIDER_NET_PROMISC_VALUE); |
| 251 | } else { |
| 252 | macu = netdev->dev_addr[0]; |
| 253 | macu <<= 8; |
| 254 | macu |= netdev->dev_addr[1]; |
| 255 | memcpy(&macl, &netdev->dev_addr[2], sizeof(macl)); |
| 256 | |
| 257 | macu |= SPIDER_NET_UA_DESCR_VALUE; |
| 258 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu); |
| 259 | spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl); |
| 260 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, |
| 261 | SPIDER_NET_NONPROMISC_VALUE); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * spider_net_get_mac_address - read mac address from spider card |
| 267 | * @card: device structure |
| 268 | * |
| 269 | * reads MAC address from GMACUNIMACU and GMACUNIMACL registers |
| 270 | */ |
| 271 | static int |
| 272 | spider_net_get_mac_address(struct net_device *netdev) |
| 273 | { |
| 274 | struct spider_net_card *card = netdev_priv(netdev); |
| 275 | u32 macl, macu; |
| 276 | |
| 277 | macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL); |
| 278 | macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU); |
| 279 | |
| 280 | netdev->dev_addr[0] = (macu >> 24) & 0xff; |
| 281 | netdev->dev_addr[1] = (macu >> 16) & 0xff; |
| 282 | netdev->dev_addr[2] = (macu >> 8) & 0xff; |
| 283 | netdev->dev_addr[3] = macu & 0xff; |
| 284 | netdev->dev_addr[4] = (macl >> 8) & 0xff; |
| 285 | netdev->dev_addr[5] = macl & 0xff; |
| 286 | |
| 287 | if (!is_valid_ether_addr(&netdev->dev_addr[0])) |
| 288 | return -EINVAL; |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | /** |
| 294 | * spider_net_get_descr_status -- returns the status of a descriptor |
| 295 | * @descr: descriptor to look at |
| 296 | * |
| 297 | * returns the status as in the dmac_cmd_status field of the descriptor |
| 298 | */ |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 299 | static inline int |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 300 | spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 301 | { |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 302 | return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | /** |
| 306 | * spider_net_free_chain - free descriptor chain |
| 307 | * @card: card structure |
| 308 | * @chain: address of chain |
| 309 | * |
| 310 | */ |
| 311 | static void |
| 312 | spider_net_free_chain(struct spider_net_card *card, |
| 313 | struct spider_net_descr_chain *chain) |
| 314 | { |
| 315 | struct spider_net_descr *descr; |
| 316 | |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 317 | descr = chain->ring; |
| 318 | do { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 319 | descr->bus_addr = 0; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 320 | descr->hwdescr->next_descr_addr = 0; |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 321 | descr = descr->next; |
| 322 | } while (descr != chain->ring); |
| 323 | |
| 324 | dma_free_coherent(&card->pdev->dev, chain->num_desc, |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 325 | chain->hwring, chain->dma_addr); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | /** |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 329 | * spider_net_init_chain - alloc and link descriptor chain |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 330 | * @card: card structure |
| 331 | * @chain: address of chain |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 332 | * |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 333 | * We manage a circular list that mirrors the hardware structure, |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 334 | * except that the hardware uses bus addresses. |
| 335 | * |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 336 | * Returns 0 on success, <0 on failure |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 337 | */ |
| 338 | static int |
| 339 | spider_net_init_chain(struct spider_net_card *card, |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 340 | struct spider_net_descr_chain *chain) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 341 | { |
| 342 | int i; |
| 343 | struct spider_net_descr *descr; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 344 | struct spider_net_hw_descr *hwdescr; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 345 | dma_addr_t buf; |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 346 | size_t alloc_size; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 347 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 348 | alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 349 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 350 | chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 351 | &chain->dma_addr, GFP_KERNEL); |
| 352 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 353 | if (!chain->hwring) |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 354 | return -ENOMEM; |
| 355 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 356 | memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr)); |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 357 | |
| 358 | /* Set up the hardware pointers in each descriptor */ |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 359 | descr = chain->ring; |
| 360 | hwdescr = chain->hwring; |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 361 | buf = chain->dma_addr; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 362 | for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { |
| 363 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
| 364 | hwdescr->next_descr_addr = 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 365 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 366 | descr->hwdescr = hwdescr; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 367 | descr->bus_addr = buf; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 368 | descr->next = descr + 1; |
| 369 | descr->prev = descr - 1; |
| 370 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 371 | buf += sizeof(struct spider_net_hw_descr); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 372 | } |
| 373 | /* do actual circular list */ |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 374 | (descr-1)->next = chain->ring; |
| 375 | chain->ring->prev = descr-1; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 376 | |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 377 | spin_lock_init(&chain->lock); |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 378 | chain->head = chain->ring; |
| 379 | chain->tail = chain->ring; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 380 | return 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | /** |
| 384 | * spider_net_free_rx_chain_contents - frees descr contents in rx chain |
| 385 | * @card: card structure |
| 386 | * |
| 387 | * returns 0 on success, <0 on failure |
| 388 | */ |
| 389 | static void |
| 390 | spider_net_free_rx_chain_contents(struct spider_net_card *card) |
| 391 | { |
| 392 | struct spider_net_descr *descr; |
| 393 | |
| 394 | descr = card->rx_chain.head; |
Linas Vepstas | 6475191 | 2006-10-10 16:22:29 -0500 | [diff] [blame] | 395 | do { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 396 | if (descr->skb) { |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 397 | pci_unmap_single(card->pdev, descr->hwdescr->buf_addr, |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 398 | SPIDER_NET_MAX_FRAME, |
Linas Vepstas | 348bc2a | 2006-10-10 16:21:10 -0500 | [diff] [blame] | 399 | PCI_DMA_BIDIRECTIONAL); |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 400 | dev_kfree_skb(descr->skb); |
| 401 | descr->skb = NULL; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 402 | } |
| 403 | descr = descr->next; |
Linas Vepstas | 6475191 | 2006-10-10 16:22:29 -0500 | [diff] [blame] | 404 | } while (descr != card->rx_chain.head); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /** |
Linas Vepstas | a4182c5 | 2006-12-13 15:19:54 -0600 | [diff] [blame] | 408 | * spider_net_prepare_rx_descr - Reinitialize RX descriptor |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 409 | * @card: card structure |
| 410 | * @descr: descriptor to re-init |
| 411 | * |
Linas Vepstas | a4182c5 | 2006-12-13 15:19:54 -0600 | [diff] [blame] | 412 | * Return 0 on succes, <0 on failure. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 413 | * |
Linas Vepstas | a4182c5 | 2006-12-13 15:19:54 -0600 | [diff] [blame] | 414 | * Allocates a new rx skb, iommu-maps it and attaches it to the |
| 415 | * descriptor. Mark the descriptor as activated, ready-to-use. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 416 | */ |
| 417 | static int |
| 418 | spider_net_prepare_rx_descr(struct spider_net_card *card, |
| 419 | struct spider_net_descr *descr) |
| 420 | { |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 421 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
Arnd Bergmann | 8e0a613 | 2006-01-12 17:16:43 -0500 | [diff] [blame] | 422 | dma_addr_t buf; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 423 | int offset; |
| 424 | int bufsize; |
| 425 | |
| 426 | /* we need to round up the buffer size to a multiple of 128 */ |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 427 | bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) & |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 428 | (~(SPIDER_NET_RXBUF_ALIGN - 1)); |
| 429 | |
| 430 | /* and we need to have it 128 byte aligned, therefore we allocate a |
| 431 | * bit more */ |
| 432 | /* allocate an skb */ |
Christoph Hellwig | 9873940 | 2007-05-16 16:58:00 -0500 | [diff] [blame] | 433 | descr->skb = netdev_alloc_skb(card->netdev, |
| 434 | bufsize + SPIDER_NET_RXBUF_ALIGN - 1); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 435 | if (!descr->skb) { |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 436 | if (netif_msg_rx_err(card) && net_ratelimit()) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 437 | dev_err(&card->netdev->dev, |
| 438 | "Not enough memory to allocate rx buffer\n"); |
Jim Lewis | 9b6b0b8 | 2006-09-22 17:22:53 -0700 | [diff] [blame] | 439 | card->spider_stats.alloc_rx_skb_error++; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 440 | return -ENOMEM; |
| 441 | } |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 442 | hwdescr->buf_size = bufsize; |
| 443 | hwdescr->result_size = 0; |
| 444 | hwdescr->valid_size = 0; |
| 445 | hwdescr->data_status = 0; |
| 446 | hwdescr->data_error = 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 447 | |
| 448 | offset = ((unsigned long)descr->skb->data) & |
| 449 | (SPIDER_NET_RXBUF_ALIGN - 1); |
| 450 | if (offset) |
| 451 | skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); |
Linas Vepstas | a4182c5 | 2006-12-13 15:19:54 -0600 | [diff] [blame] | 452 | /* iommu-map the skb */ |
Arnd Bergmann | 8e0a613 | 2006-01-12 17:16:43 -0500 | [diff] [blame] | 453 | buf = pci_map_single(card->pdev, descr->skb->data, |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 454 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 455 | if (pci_dma_mapping_error(card->pdev, buf)) { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 456 | dev_kfree_skb_any(descr->skb); |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 457 | descr->skb = NULL; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 458 | if (netif_msg_rx_err(card) && net_ratelimit()) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 459 | dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n"); |
Jim Lewis | 9b6b0b8 | 2006-09-22 17:22:53 -0700 | [diff] [blame] | 460 | card->spider_stats.rx_iommu_map_error++; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 461 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 462 | } else { |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 463 | hwdescr->buf_addr = buf; |
Linas Vepstas | 90476a2 | 2006-12-13 15:22:04 -0600 | [diff] [blame] | 464 | wmb(); |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 465 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED | |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 466 | SPIDER_NET_DMAC_NOINTR_COMPLETE; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 467 | } |
| 468 | |
Linas Vepstas | a4182c5 | 2006-12-13 15:19:54 -0600 | [diff] [blame] | 469 | return 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | /** |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 473 | * spider_net_enable_rxchtails - sets RX dmac chain tail addresses |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 474 | * @card: card structure |
| 475 | * |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 476 | * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 477 | * chip by writing to the appropriate register. DMA is enabled in |
| 478 | * spider_net_enable_rxdmac. |
| 479 | */ |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 480 | static inline void |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 481 | spider_net_enable_rxchtails(struct spider_net_card *card) |
| 482 | { |
| 483 | /* assume chain is aligned correctly */ |
| 484 | spider_net_write_reg(card, SPIDER_NET_GDADCHA , |
| 485 | card->rx_chain.tail->bus_addr); |
| 486 | } |
| 487 | |
| 488 | /** |
| 489 | * spider_net_enable_rxdmac - enables a receive DMA controller |
| 490 | * @card: card structure |
| 491 | * |
| 492 | * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN |
| 493 | * in the GDADMACCNTR register |
| 494 | */ |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 495 | static inline void |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 496 | spider_net_enable_rxdmac(struct spider_net_card *card) |
| 497 | { |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 498 | wmb(); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 499 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, |
| 500 | SPIDER_NET_DMA_RX_VALUE); |
| 501 | } |
| 502 | |
| 503 | /** |
Linas Vepstas | 59a11f8 | 2007-06-11 14:05:41 -0500 | [diff] [blame] | 504 | * spider_net_disable_rxdmac - disables the receive DMA controller |
| 505 | * @card: card structure |
| 506 | * |
| 507 | * spider_net_disable_rxdmac terminates processing on the DMA controller |
| 508 | * by turing off the DMA controller, with the force-end flag set. |
| 509 | */ |
| 510 | static inline void |
| 511 | spider_net_disable_rxdmac(struct spider_net_card *card) |
| 512 | { |
| 513 | spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, |
| 514 | SPIDER_NET_DMA_RX_FEND_VALUE); |
| 515 | } |
| 516 | |
| 517 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 518 | * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains |
| 519 | * @card: card structure |
| 520 | * |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 521 | * refills descriptors in the rx chain: allocates skbs and iommu-maps them. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 522 | */ |
| 523 | static void |
| 524 | spider_net_refill_rx_chain(struct spider_net_card *card) |
| 525 | { |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 526 | struct spider_net_descr_chain *chain = &card->rx_chain; |
| 527 | unsigned long flags; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 528 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 529 | /* one context doing the refill (and a second context seeing that |
| 530 | * and omitting it) is ok. If called by NAPI, we'll be called again |
| 531 | * as spider_net_decode_one_descr is called several times. If some |
| 532 | * interrupt calls us, the NAPI is about to clean up anyway. */ |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 533 | if (!spin_trylock_irqsave(&chain->lock, flags)) |
| 534 | return; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 535 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 536 | while (spider_net_get_descr_status(chain->head->hwdescr) == |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 537 | SPIDER_NET_DESCR_NOT_IN_USE) { |
| 538 | if (spider_net_prepare_rx_descr(card, chain->head)) |
| 539 | break; |
| 540 | chain->head = chain->head->next; |
| 541 | } |
| 542 | |
| 543 | spin_unlock_irqrestore(&chain->lock, flags); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | /** |
Linas Vepstas | 2c307db | 2006-12-13 15:20:59 -0600 | [diff] [blame] | 547 | * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 548 | * @card: card structure |
| 549 | * |
Linas Vepstas | 2c307db | 2006-12-13 15:20:59 -0600 | [diff] [blame] | 550 | * Returns 0 on success, <0 on failure. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 551 | */ |
| 552 | static int |
| 553 | spider_net_alloc_rx_skbs(struct spider_net_card *card) |
| 554 | { |
Linas Vepstas | 2bf27a0 | 2007-06-11 13:23:42 -0500 | [diff] [blame] | 555 | struct spider_net_descr_chain *chain = &card->rx_chain; |
| 556 | struct spider_net_descr *start = chain->tail; |
| 557 | struct spider_net_descr *descr = start; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 558 | |
Linas Vepstas | 2bf27a0 | 2007-06-11 13:23:42 -0500 | [diff] [blame] | 559 | /* Link up the hardware chain pointers */ |
| 560 | do { |
| 561 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; |
| 562 | descr = descr->next; |
| 563 | } while (descr != start); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 564 | |
Linas Vepstas | 2c307db | 2006-12-13 15:20:59 -0600 | [diff] [blame] | 565 | /* Put at least one buffer into the chain. if this fails, |
| 566 | * we've got a problem. If not, spider_net_refill_rx_chain |
| 567 | * will do the rest at the end of this function. */ |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 568 | if (spider_net_prepare_rx_descr(card, chain->head)) |
| 569 | goto error; |
| 570 | else |
| 571 | chain->head = chain->head->next; |
| 572 | |
Linas Vepstas | 2c307db | 2006-12-13 15:20:59 -0600 | [diff] [blame] | 573 | /* This will allocate the rest of the rx buffers; |
| 574 | * if not, it's business as usual later on. */ |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 575 | spider_net_refill_rx_chain(card); |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 576 | spider_net_enable_rxdmac(card); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 577 | return 0; |
| 578 | |
| 579 | error: |
| 580 | spider_net_free_rx_chain_contents(card); |
Linas Vepstas | 2bf27a0 | 2007-06-11 13:23:42 -0500 | [diff] [blame] | 581 | return -ENOMEM; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 585 | * spider_net_get_multicast_hash - generates hash for multicast filter table |
| 586 | * @addr: multicast address |
| 587 | * |
| 588 | * returns the hash value. |
| 589 | * |
| 590 | * spider_net_get_multicast_hash calculates a hash value for a given multicast |
| 591 | * address, that is used to set the multicast filter tables |
| 592 | */ |
| 593 | static u8 |
| 594 | spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr) |
| 595 | { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 596 | u32 crc; |
| 597 | u8 hash; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 598 | char addr_for_crc[ETH_ALEN] = { 0, }; |
| 599 | int i, bit; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 600 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 601 | for (i = 0; i < ETH_ALEN * 8; i++) { |
| 602 | bit = (addr[i / 8] >> (i % 8)) & 1; |
| 603 | addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8)); |
| 604 | } |
| 605 | |
| 606 | crc = crc32_be(~0, addr_for_crc, netdev->addr_len); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 607 | |
| 608 | hash = (crc >> 27); |
| 609 | hash <<= 3; |
| 610 | hash |= crc & 7; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 611 | hash &= 0xff; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 612 | |
| 613 | return hash; |
| 614 | } |
| 615 | |
| 616 | /** |
| 617 | * spider_net_set_multi - sets multicast addresses and promisc flags |
| 618 | * @netdev: interface device structure |
| 619 | * |
| 620 | * spider_net_set_multi configures multicast addresses as needed for the |
| 621 | * netdev interface. It also sets up multicast, allmulti and promisc |
| 622 | * flags appropriately |
| 623 | */ |
| 624 | static void |
| 625 | spider_net_set_multi(struct net_device *netdev) |
| 626 | { |
| 627 | struct dev_mc_list *mc; |
| 628 | u8 hash; |
| 629 | int i; |
| 630 | u32 reg; |
| 631 | struct spider_net_card *card = netdev_priv(netdev); |
| 632 | unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = |
| 633 | {0, }; |
| 634 | |
| 635 | spider_net_set_promisc(card); |
| 636 | |
| 637 | if (netdev->flags & IFF_ALLMULTI) { |
| 638 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { |
| 639 | set_bit(i, bitmask); |
| 640 | } |
| 641 | goto write_hash; |
| 642 | } |
| 643 | |
| 644 | /* well, we know, what the broadcast hash value is: it's xfd |
| 645 | hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ |
| 646 | set_bit(0xfd, bitmask); |
| 647 | |
| 648 | for (mc = netdev->mc_list; mc; mc = mc->next) { |
| 649 | hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr); |
| 650 | set_bit(hash, bitmask); |
| 651 | } |
| 652 | |
| 653 | write_hash: |
| 654 | for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { |
| 655 | reg = 0; |
| 656 | if (test_bit(i * 4, bitmask)) |
| 657 | reg += 0x08; |
| 658 | reg <<= 8; |
| 659 | if (test_bit(i * 4 + 1, bitmask)) |
| 660 | reg += 0x08; |
| 661 | reg <<= 8; |
| 662 | if (test_bit(i * 4 + 2, bitmask)) |
| 663 | reg += 0x08; |
| 664 | reg <<= 8; |
| 665 | if (test_bit(i * 4 + 3, bitmask)) |
| 666 | reg += 0x08; |
| 667 | |
| 668 | spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 673 | * spider_net_prepare_tx_descr - fill tx descriptor with skb data |
| 674 | * @card: card structure |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 675 | * @skb: packet to use |
| 676 | * |
| 677 | * returns 0 on success, <0 on failure. |
| 678 | * |
| 679 | * fills out the descriptor structure with skb data and len. Copies data, |
| 680 | * if needed (32bit DMA!) |
| 681 | */ |
| 682 | static int |
| 683 | spider_net_prepare_tx_descr(struct spider_net_card *card, |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 684 | struct sk_buff *skb) |
| 685 | { |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 686 | struct spider_net_descr_chain *chain = &card->tx_chain; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 687 | struct spider_net_descr *descr; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 688 | struct spider_net_hw_descr *hwdescr; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 689 | dma_addr_t buf; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 690 | unsigned long flags; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 691 | |
James K Lewis | 9c434f5 | 2006-11-17 14:39:36 -0800 | [diff] [blame] | 692 | buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 693 | if (pci_dma_mapping_error(card->pdev, buf)) { |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 694 | if (netif_msg_tx_err(card) && net_ratelimit()) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 695 | dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). " |
James K Lewis | 9c434f5 | 2006-11-17 14:39:36 -0800 | [diff] [blame] | 696 | "Dropping packet\n", skb->data, skb->len); |
Jim Lewis | 9b6b0b8 | 2006-09-22 17:22:53 -0700 | [diff] [blame] | 697 | card->spider_stats.tx_iommu_map_error++; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 698 | return -ENOMEM; |
| 699 | } |
| 700 | |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 701 | spin_lock_irqsave(&chain->lock, flags); |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 702 | descr = card->tx_chain.head; |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 703 | if (descr->next == chain->tail->prev) { |
| 704 | spin_unlock_irqrestore(&chain->lock, flags); |
| 705 | pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE); |
| 706 | return -ENOMEM; |
| 707 | } |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 708 | hwdescr = descr->hwdescr; |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 709 | chain->head = descr->next; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 710 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 711 | descr->skb = skb; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 712 | hwdescr->buf_addr = buf; |
| 713 | hwdescr->buf_size = skb->len; |
| 714 | hwdescr->next_descr_addr = 0; |
| 715 | hwdescr->data_status = 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 716 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 717 | hwdescr->dmac_cmd_status = |
Linas Vepstas | 5f309b9 | 2007-06-11 14:09:16 -0500 | [diff] [blame] | 718 | SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL; |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 719 | spin_unlock_irqrestore(&chain->lock, flags); |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 720 | |
Stephen Hemminger | 3a2c892 | 2007-06-11 13:35:23 -0500 | [diff] [blame] | 721 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 722 | switch (ip_hdr(skb)->protocol) { |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 723 | case IPPROTO_TCP: |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 724 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 725 | break; |
| 726 | case IPPROTO_UDP: |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 727 | hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 728 | break; |
| 729 | } |
| 730 | |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 731 | /* Chain the bus address, so that the DMA engine finds this descr. */ |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 732 | wmb(); |
| 733 | descr->prev->hwdescr->next_descr_addr = descr->bus_addr; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 734 | |
Linas Vepstas | 917a5b8 | 2006-10-10 16:01:51 -0500 | [diff] [blame] | 735 | card->netdev->trans_start = jiffies; /* set netdev watchdog timer */ |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 736 | return 0; |
| 737 | } |
| 738 | |
Linas Vepstas | a664ccf | 2006-10-10 16:18:18 -0500 | [diff] [blame] | 739 | static int |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 740 | spider_net_set_low_watermark(struct spider_net_card *card) |
| 741 | { |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 742 | struct spider_net_descr *descr = card->tx_chain.tail; |
| 743 | struct spider_net_hw_descr *hwdescr; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 744 | unsigned long flags; |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 745 | int status; |
| 746 | int cnt=0; |
| 747 | int i; |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 748 | |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 749 | /* Measure the length of the queue. Measurement does not |
| 750 | * need to be precise -- does not need a lock. */ |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 751 | while (descr != card->tx_chain.head) { |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 752 | status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE; |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 753 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) |
| 754 | break; |
| 755 | descr = descr->next; |
| 756 | cnt++; |
| 757 | } |
| 758 | |
| 759 | /* If TX queue is short, don't even bother with interrupts */ |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 760 | if (cnt < card->tx_chain.num_desc/4) |
Linas Vepstas | a664ccf | 2006-10-10 16:18:18 -0500 | [diff] [blame] | 761 | return cnt; |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 762 | |
| 763 | /* Set low-watermark 3/4th's of the way into the queue. */ |
| 764 | descr = card->tx_chain.tail; |
| 765 | cnt = (cnt*3)/4; |
| 766 | for (i=0;i<cnt; i++) |
| 767 | descr = descr->next; |
| 768 | |
| 769 | /* Set the new watermark, clear the old watermark */ |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 770 | spin_lock_irqsave(&card->tx_chain.lock, flags); |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 771 | descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG; |
| 772 | if (card->low_watermark && card->low_watermark != descr) { |
| 773 | hwdescr = card->low_watermark->hwdescr; |
| 774 | hwdescr->dmac_cmd_status = |
| 775 | hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG; |
| 776 | } |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 777 | card->low_watermark = descr; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 778 | spin_unlock_irqrestore(&card->tx_chain.lock, flags); |
Linas Vepstas | a664ccf | 2006-10-10 16:18:18 -0500 | [diff] [blame] | 779 | return cnt; |
Linas Vepstas | 204e5fa | 2006-10-10 16:11:33 -0500 | [diff] [blame] | 780 | } |
| 781 | |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 782 | /** |
| 783 | * spider_net_release_tx_chain - processes sent tx descriptors |
| 784 | * @card: adapter structure |
| 785 | * @brutal: if set, don't care about whether descriptor seems to be in use |
| 786 | * |
| 787 | * returns 0 if the tx ring is empty, otherwise 1. |
| 788 | * |
| 789 | * spider_net_release_tx_chain releases the tx descriptors that spider has |
| 790 | * finished with (if non-brutal) or simply release tx descriptors (if brutal). |
| 791 | * If some other context is calling this function, we return 1 so that we're |
| 792 | * scheduled again (if we were scheduled) and will not loose initiative. |
| 793 | */ |
| 794 | static int |
| 795 | spider_net_release_tx_chain(struct spider_net_card *card, int brutal) |
| 796 | { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 797 | struct net_device *dev = card->netdev; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 798 | struct spider_net_descr_chain *chain = &card->tx_chain; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 799 | struct spider_net_descr *descr; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 800 | struct spider_net_hw_descr *hwdescr; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 801 | struct sk_buff *skb; |
| 802 | u32 buf_addr; |
| 803 | unsigned long flags; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 804 | int status; |
| 805 | |
Linas Vepstas | 5c8e98f | 2007-02-20 16:41:59 -0600 | [diff] [blame] | 806 | while (1) { |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 807 | spin_lock_irqsave(&chain->lock, flags); |
Linas Vepstas | 5c8e98f | 2007-02-20 16:41:59 -0600 | [diff] [blame] | 808 | if (chain->tail == chain->head) { |
| 809 | spin_unlock_irqrestore(&chain->lock, flags); |
| 810 | return 0; |
| 811 | } |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 812 | descr = chain->tail; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 813 | hwdescr = descr->hwdescr; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 814 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 815 | status = spider_net_get_descr_status(hwdescr); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 816 | switch (status) { |
| 817 | case SPIDER_NET_DESCR_COMPLETE: |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 818 | dev->stats.tx_packets++; |
| 819 | dev->stats.tx_bytes += descr->skb->len; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 820 | break; |
| 821 | |
| 822 | case SPIDER_NET_DESCR_CARDOWNED: |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 823 | if (!brutal) { |
| 824 | spin_unlock_irqrestore(&chain->lock, flags); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 825 | return 1; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 826 | } |
| 827 | |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 828 | /* fallthrough, if we release the descriptors |
| 829 | * brutally (then we don't care about |
| 830 | * SPIDER_NET_DESCR_CARDOWNED) */ |
| 831 | |
| 832 | case SPIDER_NET_DESCR_RESPONSE_ERROR: |
| 833 | case SPIDER_NET_DESCR_PROTECTION_ERROR: |
| 834 | case SPIDER_NET_DESCR_FORCE_END: |
| 835 | if (netif_msg_tx_err(card)) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 836 | dev_err(&card->netdev->dev, "forcing end of tx descriptor " |
| 837 | "with status x%02x\n", status); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 838 | dev->stats.tx_errors++; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 839 | break; |
| 840 | |
| 841 | default: |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 842 | dev->stats.tx_dropped++; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 843 | if (!brutal) { |
| 844 | spin_unlock_irqrestore(&chain->lock, flags); |
Linas Vepstas | c3fee4c | 2006-10-10 16:00:04 -0500 | [diff] [blame] | 845 | return 1; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 846 | } |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 847 | } |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 848 | |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 849 | chain->tail = descr->next; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 850 | hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 851 | skb = descr->skb; |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 852 | descr->skb = NULL; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 853 | buf_addr = hwdescr->buf_addr; |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 854 | spin_unlock_irqrestore(&chain->lock, flags); |
| 855 | |
| 856 | /* unmap the skb */ |
| 857 | if (skb) { |
James K Lewis | 9c434f5 | 2006-11-17 14:39:36 -0800 | [diff] [blame] | 858 | pci_unmap_single(card->pdev, buf_addr, skb->len, |
| 859 | PCI_DMA_TODEVICE); |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 860 | dev_kfree_skb(skb); |
| 861 | } |
| 862 | } |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 863 | return 0; |
| 864 | } |
| 865 | |
| 866 | /** |
| 867 | * spider_net_kick_tx_dma - enables TX DMA processing |
| 868 | * @card: card structure |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 869 | * |
Linas Vepstas | a664ccf | 2006-10-10 16:18:18 -0500 | [diff] [blame] | 870 | * This routine will start the transmit DMA running if |
| 871 | * it is not already running. This routine ned only be |
| 872 | * called when queueing a new packet to an empty tx queue. |
| 873 | * Writes the current tx chain head as start address |
| 874 | * of the tx descriptor chain and enables the transmission |
| 875 | * DMA engine. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 876 | */ |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 877 | static inline void |
| 878 | spider_net_kick_tx_dma(struct spider_net_card *card) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 879 | { |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 880 | struct spider_net_descr *descr; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 881 | |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 882 | if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) & |
| 883 | SPIDER_NET_TX_DMA_EN) |
| 884 | goto out; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 885 | |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 886 | descr = card->tx_chain.tail; |
| 887 | for (;;) { |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 888 | if (spider_net_get_descr_status(descr->hwdescr) == |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 889 | SPIDER_NET_DESCR_CARDOWNED) { |
| 890 | spider_net_write_reg(card, SPIDER_NET_GDTDCHA, |
| 891 | descr->bus_addr); |
| 892 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
| 893 | SPIDER_NET_DMA_TX_VALUE); |
| 894 | break; |
| 895 | } |
| 896 | if (descr == card->tx_chain.head) |
| 897 | break; |
| 898 | descr = descr->next; |
| 899 | } |
| 900 | |
| 901 | out: |
| 902 | mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 903 | } |
| 904 | |
| 905 | /** |
| 906 | * spider_net_xmit - transmits a frame over the device |
| 907 | * @skb: packet to send out |
| 908 | * @netdev: interface device structure |
| 909 | * |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 910 | * returns 0 on success, !0 on failure |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 911 | */ |
| 912 | static int |
| 913 | spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) |
| 914 | { |
Linas Vepstas | a664ccf | 2006-10-10 16:18:18 -0500 | [diff] [blame] | 915 | int cnt; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 916 | struct spider_net_card *card = netdev_priv(netdev); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 917 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 918 | spider_net_release_tx_chain(card, 0); |
| 919 | |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 920 | if (spider_net_prepare_tx_descr(card, skb) != 0) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 921 | netdev->stats.tx_dropped++; |
Linas Vepstas | 313ef4b | 2006-10-10 16:04:00 -0500 | [diff] [blame] | 922 | netif_stop_queue(netdev); |
| 923 | return NETDEV_TX_BUSY; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 924 | } |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 925 | |
Linas Vepstas | a664ccf | 2006-10-10 16:18:18 -0500 | [diff] [blame] | 926 | cnt = spider_net_set_low_watermark(card); |
| 927 | if (cnt < 5) |
| 928 | spider_net_kick_tx_dma(card); |
Linas Vepstas | 313ef4b | 2006-10-10 16:04:00 -0500 | [diff] [blame] | 929 | return NETDEV_TX_OK; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 930 | } |
| 931 | |
| 932 | /** |
| 933 | * spider_net_cleanup_tx_ring - cleans up the TX ring |
| 934 | * @card: card structure |
| 935 | * |
Linas Vepstas | 68a8c60 | 2006-10-10 16:13:05 -0500 | [diff] [blame] | 936 | * spider_net_cleanup_tx_ring is called by either the tx_timer |
| 937 | * or from the NAPI polling routine. |
| 938 | * This routine releases resources associted with transmitted |
| 939 | * packets, including updating the queue tail pointer. |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 940 | */ |
| 941 | static void |
| 942 | spider_net_cleanup_tx_ring(struct spider_net_card *card) |
| 943 | { |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 944 | if ((spider_net_release_tx_chain(card, 0) != 0) && |
Linas Vepstas | 313ef4b | 2006-10-10 16:04:00 -0500 | [diff] [blame] | 945 | (card->netdev->flags & IFF_UP)) { |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 946 | spider_net_kick_tx_dma(card); |
Linas Vepstas | 313ef4b | 2006-10-10 16:04:00 -0500 | [diff] [blame] | 947 | netif_wake_queue(card->netdev); |
| 948 | } |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 949 | } |
| 950 | |
| 951 | /** |
| 952 | * spider_net_do_ioctl - called for device ioctls |
| 953 | * @netdev: interface device structure |
| 954 | * @ifr: request parameter structure for ioctl |
| 955 | * @cmd: command code for ioctl |
| 956 | * |
| 957 | * returns 0 on success, <0 on failure. Currently, we have no special ioctls. |
| 958 | * -EOPNOTSUPP is returned, if an unknown ioctl was requested |
| 959 | */ |
| 960 | static int |
| 961 | spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
| 962 | { |
| 963 | switch (cmd) { |
| 964 | default: |
| 965 | return -EOPNOTSUPP; |
| 966 | } |
| 967 | } |
| 968 | |
| 969 | /** |
| 970 | * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on |
| 971 | * @descr: descriptor to process |
| 972 | * @card: card structure |
| 973 | * |
Linas Vepstas | 05b346b | 2006-12-13 15:15:15 -0600 | [diff] [blame] | 974 | * Fills out skb structure and passes the data to the stack. |
| 975 | * The descriptor state is not changed. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 976 | */ |
Linas Vepstas | 7f7223b | 2006-12-13 15:17:39 -0600 | [diff] [blame] | 977 | static void |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 978 | spider_net_pass_skb_up(struct spider_net_descr *descr, |
Linas Vepstas | 1cd173f | 2006-12-13 15:12:26 -0600 | [diff] [blame] | 979 | struct spider_net_card *card) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 980 | { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 981 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
| 982 | struct sk_buff *skb = descr->skb; |
| 983 | struct net_device *netdev = card->netdev; |
| 984 | u32 data_status = hwdescr->data_status; |
| 985 | u32 data_error = hwdescr->data_error; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 986 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 987 | skb_put(skb, hwdescr->valid_size); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 988 | |
| 989 | /* the card seems to add 2 bytes of junk in front |
| 990 | * of the ethernet frame */ |
| 991 | #define SPIDER_MISALIGN 2 |
| 992 | skb_pull(skb, SPIDER_MISALIGN); |
| 993 | skb->protocol = eth_type_trans(skb, netdev); |
| 994 | |
| 995 | /* checksum offload */ |
| 996 | if (card->options.rx_csum) { |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 997 | if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) == |
| 998 | SPIDER_NET_DATA_STATUS_CKSUM_MASK) && |
| 999 | !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK)) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1000 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1001 | else |
| 1002 | skb->ip_summed = CHECKSUM_NONE; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1003 | } else |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1004 | skb->ip_summed = CHECKSUM_NONE; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1005 | |
| 1006 | if (data_status & SPIDER_NET_VLAN_PACKET) { |
| 1007 | /* further enhancements: HW-accel VLAN |
| 1008 | * vlan_hwaccel_receive_skb |
| 1009 | */ |
| 1010 | } |
| 1011 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1012 | /* update netdevice statistics */ |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 1013 | netdev->stats.rx_packets++; |
| 1014 | netdev->stats.rx_bytes += skb->len; |
Florin Malita | 93c1d3b | 2007-05-22 18:09:42 -0500 | [diff] [blame] | 1015 | |
| 1016 | /* pass skb up to stack */ |
| 1017 | netif_receive_skb(skb); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1018 | } |
| 1019 | |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1020 | static void show_rx_chain(struct spider_net_card *card) |
| 1021 | { |
| 1022 | struct spider_net_descr_chain *chain = &card->rx_chain; |
| 1023 | struct spider_net_descr *start= chain->tail; |
| 1024 | struct spider_net_descr *descr= start; |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1025 | struct spider_net_hw_descr *hwd = start->hwdescr; |
| 1026 | struct device *dev = &card->netdev->dev; |
| 1027 | u32 curr_desc, next_desc; |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1028 | int status; |
| 1029 | |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1030 | int tot = 0; |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1031 | int cnt = 0; |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1032 | int off = start - chain->ring; |
| 1033 | int cstat = hwd->dmac_cmd_status; |
| 1034 | |
| 1035 | dev_info(dev, "Total number of descrs=%d\n", |
| 1036 | chain->num_desc); |
| 1037 | dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n", |
| 1038 | off, cstat); |
| 1039 | |
| 1040 | curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA); |
| 1041 | next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA); |
| 1042 | |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1043 | status = cstat; |
| 1044 | do |
| 1045 | { |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1046 | hwd = descr->hwdescr; |
| 1047 | off = descr - chain->ring; |
| 1048 | status = hwd->dmac_cmd_status; |
| 1049 | |
| 1050 | if (descr == chain->head) |
| 1051 | dev_info(dev, "Chain head is at %d, head status=0x%x\n", |
| 1052 | off, status); |
| 1053 | |
| 1054 | if (curr_desc == descr->bus_addr) |
| 1055 | dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n", |
| 1056 | off, status); |
| 1057 | |
| 1058 | if (next_desc == descr->bus_addr) |
| 1059 | dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n", |
| 1060 | off, status); |
| 1061 | |
| 1062 | if (hwd->next_descr_addr == 0) |
| 1063 | dev_info(dev, "chain is cut at %d\n", off); |
| 1064 | |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1065 | if (cstat != status) { |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1066 | int from = (chain->num_desc + off - cnt) % chain->num_desc; |
| 1067 | int to = (chain->num_desc + off - 1) % chain->num_desc; |
| 1068 | dev_info(dev, "Have %d (from %d to %d) descrs " |
| 1069 | "with stat=0x%08x\n", cnt, from, to, cstat); |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1070 | cstat = status; |
| 1071 | cnt = 0; |
| 1072 | } |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1073 | |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1074 | cnt ++; |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1075 | tot ++; |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1076 | descr = descr->next; |
| 1077 | } while (descr != start); |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1078 | |
| 1079 | dev_info(dev, "Last %d descrs with stat=0x%08x " |
| 1080 | "for a total of %d descrs\n", cnt, cstat, tot); |
| 1081 | |
| 1082 | #ifdef DEBUG |
| 1083 | /* Now dump the whole ring */ |
| 1084 | descr = start; |
| 1085 | do |
| 1086 | { |
| 1087 | struct spider_net_hw_descr *hwd = descr->hwdescr; |
| 1088 | status = spider_net_get_descr_status(hwd); |
| 1089 | cnt = descr - chain->ring; |
| 1090 | dev_info(dev, "Descr %d stat=0x%08x skb=%p\n", |
| 1091 | cnt, status, descr->skb); |
| 1092 | dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n", |
| 1093 | descr->bus_addr, hwd->buf_addr, hwd->buf_size); |
| 1094 | dev_info(dev, "next=%08x result sz=%d valid sz=%d\n", |
| 1095 | hwd->next_descr_addr, hwd->result_size, |
| 1096 | hwd->valid_size); |
| 1097 | dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n", |
| 1098 | hwd->dmac_cmd_status, hwd->data_status, |
| 1099 | hwd->data_error); |
| 1100 | dev_info(dev, "\n"); |
| 1101 | |
| 1102 | descr = descr->next; |
| 1103 | } while (descr != start); |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1104 | #endif |
| 1105 | |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1106 | } |
| 1107 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1108 | /** |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1109 | * spider_net_resync_head_ptr - Advance head ptr past empty descrs |
| 1110 | * |
| 1111 | * If the driver fails to keep up and empty the queue, then the |
| 1112 | * hardware wil run out of room to put incoming packets. This |
| 1113 | * will cause the hardware to skip descrs that are full (instead |
| 1114 | * of halting/retrying). Thus, once the driver runs, it wil need |
| 1115 | * to "catch up" to where the hardware chain pointer is at. |
| 1116 | */ |
| 1117 | static void spider_net_resync_head_ptr(struct spider_net_card *card) |
| 1118 | { |
| 1119 | unsigned long flags; |
| 1120 | struct spider_net_descr_chain *chain = &card->rx_chain; |
| 1121 | struct spider_net_descr *descr; |
| 1122 | int i, status; |
| 1123 | |
| 1124 | /* Advance head pointer past any empty descrs */ |
| 1125 | descr = chain->head; |
| 1126 | status = spider_net_get_descr_status(descr->hwdescr); |
| 1127 | |
| 1128 | if (status == SPIDER_NET_DESCR_NOT_IN_USE) |
| 1129 | return; |
| 1130 | |
| 1131 | spin_lock_irqsave(&chain->lock, flags); |
| 1132 | |
| 1133 | descr = chain->head; |
| 1134 | status = spider_net_get_descr_status(descr->hwdescr); |
| 1135 | for (i=0; i<chain->num_desc; i++) { |
| 1136 | if (status != SPIDER_NET_DESCR_CARDOWNED) break; |
| 1137 | descr = descr->next; |
| 1138 | status = spider_net_get_descr_status(descr->hwdescr); |
| 1139 | } |
| 1140 | chain->head = descr; |
| 1141 | |
| 1142 | spin_unlock_irqrestore(&chain->lock, flags); |
| 1143 | } |
| 1144 | |
| 1145 | static int spider_net_resync_tail_ptr(struct spider_net_card *card) |
| 1146 | { |
| 1147 | struct spider_net_descr_chain *chain = &card->rx_chain; |
| 1148 | struct spider_net_descr *descr; |
| 1149 | int i, status; |
| 1150 | |
| 1151 | /* Advance tail pointer past any empty and reaped descrs */ |
| 1152 | descr = chain->tail; |
| 1153 | status = spider_net_get_descr_status(descr->hwdescr); |
| 1154 | |
| 1155 | for (i=0; i<chain->num_desc; i++) { |
| 1156 | if ((status != SPIDER_NET_DESCR_CARDOWNED) && |
| 1157 | (status != SPIDER_NET_DESCR_NOT_IN_USE)) break; |
| 1158 | descr = descr->next; |
| 1159 | status = spider_net_get_descr_status(descr->hwdescr); |
| 1160 | } |
| 1161 | chain->tail = descr; |
| 1162 | |
| 1163 | if ((i == chain->num_desc) || (i == 0)) |
| 1164 | return 1; |
| 1165 | return 0; |
| 1166 | } |
| 1167 | |
| 1168 | /** |
Linas Vepstas | 7376e73 | 2007-02-20 16:42:59 -0600 | [diff] [blame] | 1169 | * spider_net_decode_one_descr - processes an RX descriptor |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1170 | * @card: card structure |
| 1171 | * |
Linas Vepstas | 7376e73 | 2007-02-20 16:42:59 -0600 | [diff] [blame] | 1172 | * Returns 1 if a packet has been sent to the stack, otherwise 0. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1173 | * |
Linas Vepstas | 7376e73 | 2007-02-20 16:42:59 -0600 | [diff] [blame] | 1174 | * Processes an RX descriptor by iommu-unmapping the data buffer |
| 1175 | * and passing the packet up to the stack. This function is called |
| 1176 | * in softirq context, e.g. either bottom half from interrupt or |
| 1177 | * NAPI polling context. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1178 | */ |
| 1179 | static int |
Linas Vepstas | 1cd173f | 2006-12-13 15:12:26 -0600 | [diff] [blame] | 1180 | spider_net_decode_one_descr(struct spider_net_card *card) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1181 | { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 1182 | struct net_device *dev = card->netdev; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 1183 | struct spider_net_descr_chain *chain = &card->rx_chain; |
| 1184 | struct spider_net_descr *descr = chain->tail; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 1185 | struct spider_net_hw_descr *hwdescr = descr->hwdescr; |
Linas Vepstas | 9e0a6e2 | 2007-06-11 13:52:03 -0500 | [diff] [blame] | 1186 | u32 hw_buf_addr; |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 1187 | int status; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1188 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 1189 | status = spider_net_get_descr_status(hwdescr); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1190 | |
Linas Vepstas | 80dab7c | 2006-12-13 15:18:52 -0600 | [diff] [blame] | 1191 | /* Nothing in the descriptor, or ring must be empty */ |
| 1192 | if ((status == SPIDER_NET_DESCR_CARDOWNED) || |
| 1193 | (status == SPIDER_NET_DESCR_NOT_IN_USE)) |
Linas Vepstas | 1cd173f | 2006-12-13 15:12:26 -0600 | [diff] [blame] | 1194 | return 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1195 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1196 | /* descriptor definitively used -- move on tail */ |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1197 | chain->tail = descr->next; |
| 1198 | |
Linas Vepstas | 05b346b | 2006-12-13 15:15:15 -0600 | [diff] [blame] | 1199 | /* unmap descriptor */ |
Linas Vepstas | 9e0a6e2 | 2007-06-11 13:52:03 -0500 | [diff] [blame] | 1200 | hw_buf_addr = hwdescr->buf_addr; |
| 1201 | hwdescr->buf_addr = 0xffffffff; |
| 1202 | pci_unmap_single(card->pdev, hw_buf_addr, |
Linas Vepstas | 05b346b | 2006-12-13 15:15:15 -0600 | [diff] [blame] | 1203 | SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE); |
| 1204 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1205 | if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || |
| 1206 | (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || |
| 1207 | (status == SPIDER_NET_DESCR_FORCE_END) ) { |
| 1208 | if (netif_msg_rx_err(card)) |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 1209 | dev_err(&dev->dev, |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1210 | "dropping RX descriptor with state %d\n", status); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 1211 | dev->stats.rx_dropped++; |
Linas Vepstas | 7f7223b | 2006-12-13 15:17:39 -0600 | [diff] [blame] | 1212 | goto bad_desc; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1213 | } |
| 1214 | |
| 1215 | if ( (status != SPIDER_NET_DESCR_COMPLETE) && |
| 1216 | (status != SPIDER_NET_DESCR_FRAME_END) ) { |
Linas Vepstas | 5a02887 | 2006-12-13 15:08:25 -0600 | [diff] [blame] | 1217 | if (netif_msg_rx_err(card)) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1218 | dev_err(&card->netdev->dev, |
| 1219 | "RX descriptor with unknown state %d\n", status); |
Linas Vepstas | 5a02887 | 2006-12-13 15:08:25 -0600 | [diff] [blame] | 1220 | card->spider_stats.rx_desc_unk_state++; |
Linas Vepstas | 7f7223b | 2006-12-13 15:17:39 -0600 | [diff] [blame] | 1221 | goto bad_desc; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1222 | } |
| 1223 | |
Linas Vepstas | 366684b | 2006-12-13 15:16:18 -0600 | [diff] [blame] | 1224 | /* The cases we'll throw away the packet immediately */ |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 1225 | if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) { |
Linas Vepstas | 366684b | 2006-12-13 15:16:18 -0600 | [diff] [blame] | 1226 | if (netif_msg_rx_err(card)) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1227 | dev_err(&card->netdev->dev, |
| 1228 | "error in received descriptor found, " |
Linas Vepstas | 366684b | 2006-12-13 15:16:18 -0600 | [diff] [blame] | 1229 | "data_status=x%08x, data_error=x%08x\n", |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 1230 | hwdescr->data_status, hwdescr->data_error); |
Linas Vepstas | 7f7223b | 2006-12-13 15:17:39 -0600 | [diff] [blame] | 1231 | goto bad_desc; |
Linas Vepstas | 366684b | 2006-12-13 15:16:18 -0600 | [diff] [blame] | 1232 | } |
| 1233 | |
Linas Vepstas | e65bbf1 | 2007-06-14 18:12:23 -0500 | [diff] [blame] | 1234 | if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) { |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1235 | dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n", |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 1236 | hwdescr->dmac_cmd_status); |
Linas Vepstas | 9e0a6e2 | 2007-06-11 13:52:03 -0500 | [diff] [blame] | 1237 | pr_err("buf_addr=x%08x\n", hw_buf_addr); |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 1238 | pr_err("buf_size=x%08x\n", hwdescr->buf_size); |
| 1239 | pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr); |
| 1240 | pr_err("result_size=x%08x\n", hwdescr->result_size); |
| 1241 | pr_err("valid_size=x%08x\n", hwdescr->valid_size); |
| 1242 | pr_err("data_status=x%08x\n", hwdescr->data_status); |
| 1243 | pr_err("data_error=x%08x\n", hwdescr->data_error); |
Linas Vepstas | 6d24998 | 2006-12-13 15:23:56 -0600 | [diff] [blame] | 1244 | pr_err("which=%ld\n", descr - card->rx_chain.ring); |
| 1245 | |
| 1246 | card->spider_stats.rx_desc_error++; |
| 1247 | goto bad_desc; |
| 1248 | } |
| 1249 | |
Linas Vepstas | 7f7223b | 2006-12-13 15:17:39 -0600 | [diff] [blame] | 1250 | /* Ok, we've got a packet in descr */ |
| 1251 | spider_net_pass_skb_up(descr, card); |
Linas Vepstas | 83d3514 | 2007-06-11 13:17:02 -0500 | [diff] [blame] | 1252 | descr->skb = NULL; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 1253 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
Linas Vepstas | 7f7223b | 2006-12-13 15:17:39 -0600 | [diff] [blame] | 1254 | return 1; |
| 1255 | |
| 1256 | bad_desc: |
Linas Vepstas | 9948357 | 2007-06-11 13:48:55 -0500 | [diff] [blame] | 1257 | if (netif_msg_rx_err(card)) |
| 1258 | show_rx_chain(card); |
Linas Vepstas | 7f7223b | 2006-12-13 15:17:39 -0600 | [diff] [blame] | 1259 | dev_kfree_skb_irq(descr->skb); |
Linas Vepstas | d9c199e | 2007-02-20 16:41:03 -0600 | [diff] [blame] | 1260 | descr->skb = NULL; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 1261 | hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; |
Linas Vepstas | 7f7223b | 2006-12-13 15:17:39 -0600 | [diff] [blame] | 1262 | return 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1263 | } |
| 1264 | |
| 1265 | /** |
| 1266 | * spider_net_poll - NAPI poll function called by the stack to return packets |
| 1267 | * @netdev: interface device structure |
| 1268 | * @budget: number of packets we can pass to the stack at most |
| 1269 | * |
| 1270 | * returns 0 if no more packets available to the driver/stack. Returns 1, |
| 1271 | * if the quota is exceeded, but the driver has still packets. |
| 1272 | * |
| 1273 | * spider_net_poll returns all packets from the rx descriptors to the stack |
| 1274 | * (using netif_receive_skb). If all/enough packets are up, the driver |
| 1275 | * reenables interrupts and returns 0. If not, 1 is returned. |
| 1276 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1277 | static int spider_net_poll(struct napi_struct *napi, int budget) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1278 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1279 | struct spider_net_card *card = container_of(napi, struct spider_net_card, napi); |
| 1280 | struct net_device *netdev = card->netdev; |
| 1281 | int packets_done = 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1282 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1283 | while (packets_done < budget) { |
| 1284 | if (!spider_net_decode_one_descr(card)) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1285 | break; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1286 | |
| 1287 | packets_done++; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1288 | } |
| 1289 | |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1290 | if ((packets_done == 0) && (card->num_rx_ints != 0)) { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1291 | if (!spider_net_resync_tail_ptr(card)) |
| 1292 | packets_done = budget; |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1293 | spider_net_resync_head_ptr(card); |
| 1294 | } |
| 1295 | card->num_rx_ints = 0; |
| 1296 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1297 | spider_net_refill_rx_chain(card); |
Linas Vepstas | 80dab7c | 2006-12-13 15:18:52 -0600 | [diff] [blame] | 1298 | spider_net_enable_rxdmac(card); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1299 | |
Linas Vepstas | e1fd907 | 2007-06-11 13:59:21 -0500 | [diff] [blame] | 1300 | spider_net_cleanup_tx_ring(card); |
| 1301 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1302 | /* if all packets are in the stack, enable interrupts and return 0 */ |
| 1303 | /* if not, return 1 */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1304 | if (packets_done < budget) { |
| 1305 | netif_rx_complete(netdev, napi); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1306 | spider_net_rx_irq_on(card); |
Linas Vepstas | c3d1182 | 2007-06-11 13:26:50 -0500 | [diff] [blame] | 1307 | card->ignore_rx_ramfull = 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1308 | } |
| 1309 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1310 | return packets_done; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1314 | * spider_net_change_mtu - changes the MTU of an interface |
| 1315 | * @netdev: interface device structure |
| 1316 | * @new_mtu: new MTU value |
| 1317 | * |
| 1318 | * returns 0 on success, <0 on failure |
| 1319 | */ |
| 1320 | static int |
| 1321 | spider_net_change_mtu(struct net_device *netdev, int new_mtu) |
| 1322 | { |
| 1323 | /* no need to re-alloc skbs or so -- the max mtu is about 2.3k |
| 1324 | * and mtu is outbound only anyway */ |
| 1325 | if ( (new_mtu < SPIDER_NET_MIN_MTU ) || |
| 1326 | (new_mtu > SPIDER_NET_MAX_MTU) ) |
| 1327 | return -EINVAL; |
| 1328 | netdev->mtu = new_mtu; |
| 1329 | return 0; |
| 1330 | } |
| 1331 | |
| 1332 | /** |
| 1333 | * spider_net_set_mac - sets the MAC of an interface |
| 1334 | * @netdev: interface device structure |
| 1335 | * @ptr: pointer to new MAC address |
| 1336 | * |
| 1337 | * Returns 0 on success, <0 on failure. Currently, we don't support this |
| 1338 | * and will always return EOPNOTSUPP. |
| 1339 | */ |
| 1340 | static int |
| 1341 | spider_net_set_mac(struct net_device *netdev, void *p) |
| 1342 | { |
| 1343 | struct spider_net_card *card = netdev_priv(netdev); |
Jens Osterkamp | 054034d | 2005-09-06 19:30:55 -0700 | [diff] [blame] | 1344 | u32 macl, macu, regvalue; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1345 | struct sockaddr *addr = p; |
| 1346 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1347 | if (!is_valid_ether_addr(addr->sa_data)) |
| 1348 | return -EADDRNOTAVAIL; |
| 1349 | |
Jens Osterkamp | 054034d | 2005-09-06 19:30:55 -0700 | [diff] [blame] | 1350 | /* switch off GMACTPE and GMACRPE */ |
| 1351 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); |
| 1352 | regvalue &= ~((1 << 5) | (1 << 6)); |
| 1353 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); |
| 1354 | |
| 1355 | /* write mac */ |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1356 | macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) + |
| 1357 | (addr->sa_data[2]<<8) + (addr->sa_data[3]); |
| 1358 | macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]); |
| 1359 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu); |
| 1360 | spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl); |
| 1361 | |
Jens Osterkamp | 054034d | 2005-09-06 19:30:55 -0700 | [diff] [blame] | 1362 | /* switch GMACTPE and GMACRPE back on */ |
| 1363 | regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD); |
| 1364 | regvalue |= ((1 << 5) | (1 << 6)); |
| 1365 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue); |
| 1366 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1367 | spider_net_set_promisc(card); |
| 1368 | |
| 1369 | /* look up, whether we have been successful */ |
| 1370 | if (spider_net_get_mac_address(netdev)) |
| 1371 | return -EADDRNOTAVAIL; |
| 1372 | if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len)) |
| 1373 | return -EADDRNOTAVAIL; |
| 1374 | |
| 1375 | return 0; |
| 1376 | } |
| 1377 | |
| 1378 | /** |
Kou Ishizaki | abdb66b | 2007-02-20 16:33:41 -0600 | [diff] [blame] | 1379 | * spider_net_link_reset |
| 1380 | * @netdev: net device structure |
| 1381 | * |
| 1382 | * This is called when the PHY_LINK signal is asserted. For the blade this is |
| 1383 | * not connected so we should never get here. |
| 1384 | * |
| 1385 | */ |
| 1386 | static void |
| 1387 | spider_net_link_reset(struct net_device *netdev) |
| 1388 | { |
| 1389 | |
| 1390 | struct spider_net_card *card = netdev_priv(netdev); |
| 1391 | |
| 1392 | del_timer_sync(&card->aneg_timer); |
| 1393 | |
| 1394 | /* clear interrupt, block further interrupts */ |
| 1395 | spider_net_write_reg(card, SPIDER_NET_GMACST, |
| 1396 | spider_net_read_reg(card, SPIDER_NET_GMACST)); |
| 1397 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); |
| 1398 | |
| 1399 | /* reset phy and setup aneg */ |
Ishizaki Kou | 81971be | 2008-04-11 12:27:34 +0900 | [diff] [blame] | 1400 | card->aneg_count = 0; |
| 1401 | card->medium = BCM54XX_COPPER; |
Kou Ishizaki | abdb66b | 2007-02-20 16:33:41 -0600 | [diff] [blame] | 1402 | spider_net_setup_aneg(card); |
| 1403 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); |
| 1404 | |
| 1405 | } |
| 1406 | |
| 1407 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1408 | * spider_net_handle_error_irq - handles errors raised by an interrupt |
| 1409 | * @card: card structure |
| 1410 | * @status_reg: interrupt status register 0 (GHIINT0STS) |
| 1411 | * |
| 1412 | * spider_net_handle_error_irq treats or ignores all error conditions |
| 1413 | * found when an interrupt is presented |
| 1414 | */ |
| 1415 | static void |
Ishizaki Kou | 9a11fcb | 2008-04-11 12:32:30 +0900 | [diff] [blame] | 1416 | spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg, |
| 1417 | u32 error_reg1, u32 error_reg2) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1418 | { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1419 | u32 i; |
| 1420 | int show_error = 1; |
| 1421 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1422 | /* check GHIINT0STS ************************************/ |
| 1423 | if (status_reg) |
| 1424 | for (i = 0; i < 32; i++) |
| 1425 | if (status_reg & (1<<i)) |
| 1426 | switch (i) |
| 1427 | { |
| 1428 | /* let error_reg1 and error_reg2 evaluation decide, what to do |
| 1429 | case SPIDER_NET_PHYINT: |
| 1430 | case SPIDER_NET_GMAC2INT: |
| 1431 | case SPIDER_NET_GMAC1INT: |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1432 | case SPIDER_NET_GFIFOINT: |
| 1433 | case SPIDER_NET_DMACINT: |
| 1434 | case SPIDER_NET_GSYSINT: |
| 1435 | break; */ |
| 1436 | |
Linas Vepstas | 98b9040 | 2006-10-10 16:08:42 -0500 | [diff] [blame] | 1437 | case SPIDER_NET_GIPSINT: |
| 1438 | show_error = 0; |
| 1439 | break; |
| 1440 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1441 | case SPIDER_NET_GPWOPCMPINT: |
| 1442 | /* PHY write operation completed */ |
| 1443 | show_error = 0; |
| 1444 | break; |
| 1445 | case SPIDER_NET_GPROPCMPINT: |
| 1446 | /* PHY read operation completed */ |
| 1447 | /* we don't use semaphores, as we poll for the completion |
| 1448 | * of the read operation in spider_net_read_phy. Should take |
| 1449 | * about 50 us */ |
| 1450 | show_error = 0; |
| 1451 | break; |
| 1452 | case SPIDER_NET_GPWFFINT: |
| 1453 | /* PHY command queue full */ |
| 1454 | if (netif_msg_intr(card)) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1455 | dev_err(&card->netdev->dev, "PHY write queue full\n"); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1456 | show_error = 0; |
| 1457 | break; |
| 1458 | |
| 1459 | /* case SPIDER_NET_GRMDADRINT: not used. print a message */ |
| 1460 | /* case SPIDER_NET_GRMARPINT: not used. print a message */ |
| 1461 | /* case SPIDER_NET_GRMMPINT: not used. print a message */ |
| 1462 | |
| 1463 | case SPIDER_NET_GDTDEN0INT: |
| 1464 | /* someone has set TX_DMA_EN to 0 */ |
| 1465 | show_error = 0; |
| 1466 | break; |
| 1467 | |
| 1468 | case SPIDER_NET_GDDDEN0INT: /* fallthrough */ |
| 1469 | case SPIDER_NET_GDCDEN0INT: /* fallthrough */ |
| 1470 | case SPIDER_NET_GDBDEN0INT: /* fallthrough */ |
| 1471 | case SPIDER_NET_GDADEN0INT: |
| 1472 | /* someone has set RX_DMA_EN to 0 */ |
| 1473 | show_error = 0; |
| 1474 | break; |
| 1475 | |
| 1476 | /* RX interrupts */ |
| 1477 | case SPIDER_NET_GDDFDCINT: |
| 1478 | case SPIDER_NET_GDCFDCINT: |
| 1479 | case SPIDER_NET_GDBFDCINT: |
| 1480 | case SPIDER_NET_GDAFDCINT: |
| 1481 | /* case SPIDER_NET_GDNMINT: not used. print a message */ |
| 1482 | /* case SPIDER_NET_GCNMINT: not used. print a message */ |
| 1483 | /* case SPIDER_NET_GBNMINT: not used. print a message */ |
| 1484 | /* case SPIDER_NET_GANMINT: not used. print a message */ |
| 1485 | /* case SPIDER_NET_GRFNMINT: not used. print a message */ |
| 1486 | show_error = 0; |
| 1487 | break; |
| 1488 | |
| 1489 | /* TX interrupts */ |
| 1490 | case SPIDER_NET_GDTFDCINT: |
| 1491 | show_error = 0; |
| 1492 | break; |
| 1493 | case SPIDER_NET_GTTEDINT: |
| 1494 | show_error = 0; |
| 1495 | break; |
| 1496 | case SPIDER_NET_GDTDCEINT: |
| 1497 | /* chain end. If a descriptor should be sent, kick off |
| 1498 | * tx dma |
Linas Vepstas | 98b9040 | 2006-10-10 16:08:42 -0500 | [diff] [blame] | 1499 | if (card->tx_chain.tail != card->tx_chain.head) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1500 | spider_net_kick_tx_dma(card); |
Linas Vepstas | 98b9040 | 2006-10-10 16:08:42 -0500 | [diff] [blame] | 1501 | */ |
| 1502 | show_error = 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1503 | break; |
| 1504 | |
| 1505 | /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ |
| 1506 | /* case SPIDER_NET_GFREECNTINT: not used. print a message */ |
| 1507 | } |
| 1508 | |
| 1509 | /* check GHIINT1STS ************************************/ |
| 1510 | if (error_reg1) |
| 1511 | for (i = 0; i < 32; i++) |
| 1512 | if (error_reg1 & (1<<i)) |
| 1513 | switch (i) |
| 1514 | { |
| 1515 | case SPIDER_NET_GTMFLLINT: |
Ishizaki Kou | fc8e13d | 2007-02-20 16:37:42 -0600 | [diff] [blame] | 1516 | /* TX RAM full may happen on a usual case. |
| 1517 | * Logging is not needed. */ |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1518 | show_error = 0; |
| 1519 | break; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1520 | case SPIDER_NET_GRFDFLLINT: /* fallthrough */ |
| 1521 | case SPIDER_NET_GRFCFLLINT: /* fallthrough */ |
| 1522 | case SPIDER_NET_GRFBFLLINT: /* fallthrough */ |
| 1523 | case SPIDER_NET_GRFAFLLINT: /* fallthrough */ |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1524 | case SPIDER_NET_GRMFLLINT: |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1525 | /* Could happen when rx chain is full */ |
Linas Vepstas | c3d1182 | 2007-06-11 13:26:50 -0500 | [diff] [blame] | 1526 | if (card->ignore_rx_ramfull == 0) { |
| 1527 | card->ignore_rx_ramfull = 1; |
| 1528 | spider_net_resync_head_ptr(card); |
| 1529 | spider_net_refill_rx_chain(card); |
| 1530 | spider_net_enable_rxdmac(card); |
| 1531 | card->num_rx_ints ++; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1532 | netif_rx_schedule(card->netdev, |
| 1533 | &card->napi); |
Linas Vepstas | c3d1182 | 2007-06-11 13:26:50 -0500 | [diff] [blame] | 1534 | } |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1535 | show_error = 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1536 | break; |
| 1537 | |
| 1538 | /* case SPIDER_NET_GTMSHTINT: problem, print a message */ |
| 1539 | case SPIDER_NET_GDTINVDINT: |
| 1540 | /* allrighty. tx from previous descr ok */ |
| 1541 | show_error = 0; |
| 1542 | break; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1543 | |
| 1544 | /* chain end */ |
| 1545 | case SPIDER_NET_GDDDCEINT: /* fallthrough */ |
| 1546 | case SPIDER_NET_GDCDCEINT: /* fallthrough */ |
| 1547 | case SPIDER_NET_GDBDCEINT: /* fallthrough */ |
| 1548 | case SPIDER_NET_GDADCEINT: |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1549 | spider_net_resync_head_ptr(card); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1550 | spider_net_refill_rx_chain(card); |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1551 | spider_net_enable_rxdmac(card); |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1552 | card->num_rx_ints ++; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1553 | netif_rx_schedule(card->netdev, |
| 1554 | &card->napi); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1555 | show_error = 0; |
| 1556 | break; |
| 1557 | |
| 1558 | /* invalid descriptor */ |
| 1559 | case SPIDER_NET_GDDINVDINT: /* fallthrough */ |
| 1560 | case SPIDER_NET_GDCINVDINT: /* fallthrough */ |
| 1561 | case SPIDER_NET_GDBINVDINT: /* fallthrough */ |
| 1562 | case SPIDER_NET_GDAINVDINT: |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1563 | /* Could happen when rx chain is full */ |
| 1564 | spider_net_resync_head_ptr(card); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1565 | spider_net_refill_rx_chain(card); |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1566 | spider_net_enable_rxdmac(card); |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1567 | card->num_rx_ints ++; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1568 | netif_rx_schedule(card->netdev, |
| 1569 | &card->napi); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1570 | show_error = 0; |
| 1571 | break; |
| 1572 | |
| 1573 | /* case SPIDER_NET_GDTRSERINT: problem, print a message */ |
| 1574 | /* case SPIDER_NET_GDDRSERINT: problem, print a message */ |
| 1575 | /* case SPIDER_NET_GDCRSERINT: problem, print a message */ |
| 1576 | /* case SPIDER_NET_GDBRSERINT: problem, print a message */ |
| 1577 | /* case SPIDER_NET_GDARSERINT: problem, print a message */ |
| 1578 | /* case SPIDER_NET_GDSERINT: problem, print a message */ |
| 1579 | /* case SPIDER_NET_GDTPTERINT: problem, print a message */ |
| 1580 | /* case SPIDER_NET_GDDPTERINT: problem, print a message */ |
| 1581 | /* case SPIDER_NET_GDCPTERINT: problem, print a message */ |
| 1582 | /* case SPIDER_NET_GDBPTERINT: problem, print a message */ |
| 1583 | /* case SPIDER_NET_GDAPTERINT: problem, print a message */ |
| 1584 | default: |
| 1585 | show_error = 1; |
| 1586 | break; |
| 1587 | } |
| 1588 | |
| 1589 | /* check GHIINT2STS ************************************/ |
| 1590 | if (error_reg2) |
| 1591 | for (i = 0; i < 32; i++) |
| 1592 | if (error_reg2 & (1<<i)) |
| 1593 | switch (i) |
| 1594 | { |
| 1595 | /* there is nothing we can (want to) do at this time. Log a |
| 1596 | * message, we can switch on and off the specific values later on |
| 1597 | case SPIDER_NET_GPROPERINT: |
| 1598 | case SPIDER_NET_GMCTCRSNGINT: |
| 1599 | case SPIDER_NET_GMCTLCOLINT: |
| 1600 | case SPIDER_NET_GMCTTMOTINT: |
| 1601 | case SPIDER_NET_GMCRCAERINT: |
| 1602 | case SPIDER_NET_GMCRCALERINT: |
| 1603 | case SPIDER_NET_GMCRALNERINT: |
| 1604 | case SPIDER_NET_GMCROVRINT: |
| 1605 | case SPIDER_NET_GMCRRNTINT: |
| 1606 | case SPIDER_NET_GMCRRXERINT: |
| 1607 | case SPIDER_NET_GTITCSERINT: |
| 1608 | case SPIDER_NET_GTIFMTERINT: |
| 1609 | case SPIDER_NET_GTIPKTRVKINT: |
| 1610 | case SPIDER_NET_GTISPINGINT: |
| 1611 | case SPIDER_NET_GTISADNGINT: |
| 1612 | case SPIDER_NET_GTISPDNGINT: |
| 1613 | case SPIDER_NET_GRIFMTERINT: |
| 1614 | case SPIDER_NET_GRIPKTRVKINT: |
| 1615 | case SPIDER_NET_GRISPINGINT: |
| 1616 | case SPIDER_NET_GRISADNGINT: |
| 1617 | case SPIDER_NET_GRISPDNGINT: |
| 1618 | break; |
| 1619 | */ |
| 1620 | default: |
| 1621 | break; |
| 1622 | } |
| 1623 | |
Linas Vepstas | 5a02887 | 2006-12-13 15:08:25 -0600 | [diff] [blame] | 1624 | if ((show_error) && (netif_msg_intr(card)) && net_ratelimit()) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1625 | dev_err(&card->netdev->dev, "Error interrupt, GHIINT0STS = 0x%08x, " |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1626 | "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", |
| 1627 | status_reg, error_reg1, error_reg2); |
| 1628 | |
| 1629 | /* clear interrupt sources */ |
| 1630 | spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); |
| 1631 | spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); |
| 1632 | } |
| 1633 | |
| 1634 | /** |
| 1635 | * spider_net_interrupt - interrupt handler for spider_net |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 1636 | * @irq: interrupt number |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1637 | * @ptr: pointer to net_device |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1638 | * |
| 1639 | * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no |
| 1640 | * interrupt found raised by card. |
| 1641 | * |
| 1642 | * This is the interrupt handler, that turns off |
| 1643 | * interrupts for this device and makes the stack poll the driver |
| 1644 | */ |
| 1645 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1646 | spider_net_interrupt(int irq, void *ptr) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1647 | { |
| 1648 | struct net_device *netdev = ptr; |
| 1649 | struct spider_net_card *card = netdev_priv(netdev); |
Ishizaki Kou | 9a11fcb | 2008-04-11 12:32:30 +0900 | [diff] [blame] | 1650 | u32 status_reg, error_reg1, error_reg2; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1651 | |
| 1652 | status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); |
Ishizaki Kou | 9a11fcb | 2008-04-11 12:32:30 +0900 | [diff] [blame] | 1653 | error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); |
| 1654 | error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1655 | |
Ishizaki Kou | 9a11fcb | 2008-04-11 12:32:30 +0900 | [diff] [blame] | 1656 | if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) && |
| 1657 | !(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) && |
| 1658 | !(error_reg2 & SPIDER_NET_INT2_MASK_VALUE)) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1659 | return IRQ_NONE; |
| 1660 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1661 | if (status_reg & SPIDER_NET_RXINT ) { |
| 1662 | spider_net_rx_irq_off(card); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1663 | netif_rx_schedule(netdev, &card->napi); |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 1664 | card->num_rx_ints ++; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1665 | } |
Linas Vepstas | 68a8c60 | 2006-10-10 16:13:05 -0500 | [diff] [blame] | 1666 | if (status_reg & SPIDER_NET_TXINT) |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1667 | netif_rx_schedule(netdev, &card->napi); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1668 | |
Kou Ishizaki | abdb66b | 2007-02-20 16:33:41 -0600 | [diff] [blame] | 1669 | if (status_reg & SPIDER_NET_LINKINT) |
| 1670 | spider_net_link_reset(netdev); |
| 1671 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1672 | if (status_reg & SPIDER_NET_ERRINT ) |
Ishizaki Kou | 9a11fcb | 2008-04-11 12:32:30 +0900 | [diff] [blame] | 1673 | spider_net_handle_error_irq(card, status_reg, |
| 1674 | error_reg1, error_reg2); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1675 | |
| 1676 | /* clear interrupt sources */ |
| 1677 | spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); |
| 1678 | |
| 1679 | return IRQ_HANDLED; |
| 1680 | } |
| 1681 | |
| 1682 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1683 | /** |
| 1684 | * spider_net_poll_controller - artificial interrupt for netconsole etc. |
| 1685 | * @netdev: interface device structure |
| 1686 | * |
| 1687 | * see Documentation/networking/netconsole.txt |
| 1688 | */ |
| 1689 | static void |
| 1690 | spider_net_poll_controller(struct net_device *netdev) |
| 1691 | { |
| 1692 | disable_irq(netdev->irq); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1693 | spider_net_interrupt(netdev->irq, netdev); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1694 | enable_irq(netdev->irq); |
| 1695 | } |
| 1696 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
| 1697 | |
| 1698 | /** |
Ishizaki Kou | 7a62755 | 2007-07-09 18:17:42 -0500 | [diff] [blame] | 1699 | * spider_net_enable_interrupts - enable interrupts |
| 1700 | * @card: card structure |
| 1701 | * |
| 1702 | * spider_net_enable_interrupt enables several interrupts |
| 1703 | */ |
Jeff Garzik | 7d2e3cb | 2008-05-13 01:41:58 -0400 | [diff] [blame] | 1704 | static void |
Ishizaki Kou | 7a62755 | 2007-07-09 18:17:42 -0500 | [diff] [blame] | 1705 | spider_net_enable_interrupts(struct spider_net_card *card) |
| 1706 | { |
| 1707 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, |
| 1708 | SPIDER_NET_INT0_MASK_VALUE); |
| 1709 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, |
| 1710 | SPIDER_NET_INT1_MASK_VALUE); |
| 1711 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, |
| 1712 | SPIDER_NET_INT2_MASK_VALUE); |
| 1713 | } |
| 1714 | |
| 1715 | /** |
| 1716 | * spider_net_disable_interrupts - disable interrupts |
| 1717 | * @card: card structure |
| 1718 | * |
| 1719 | * spider_net_disable_interrupts disables all the interrupts |
| 1720 | */ |
Jeff Garzik | 7d2e3cb | 2008-05-13 01:41:58 -0400 | [diff] [blame] | 1721 | static void |
Ishizaki Kou | 7a62755 | 2007-07-09 18:17:42 -0500 | [diff] [blame] | 1722 | spider_net_disable_interrupts(struct spider_net_card *card) |
| 1723 | { |
| 1724 | spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); |
| 1725 | spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); |
| 1726 | spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); |
| 1727 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0); |
| 1728 | } |
| 1729 | |
| 1730 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1731 | * spider_net_init_card - initializes the card |
| 1732 | * @card: card structure |
| 1733 | * |
| 1734 | * spider_net_init_card initializes the card so that other registers can |
| 1735 | * be used |
| 1736 | */ |
| 1737 | static void |
| 1738 | spider_net_init_card(struct spider_net_card *card) |
| 1739 | { |
| 1740 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
| 1741 | SPIDER_NET_CKRCTRL_STOP_VALUE); |
| 1742 | |
| 1743 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
| 1744 | SPIDER_NET_CKRCTRL_RUN_VALUE); |
Kou Ishizaki | 3342cf0 | 2007-02-20 16:36:14 -0600 | [diff] [blame] | 1745 | |
| 1746 | /* trigger ETOMOD signal */ |
| 1747 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, |
| 1748 | spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4); |
| 1749 | |
Ishizaki Kou | 7a62755 | 2007-07-09 18:17:42 -0500 | [diff] [blame] | 1750 | spider_net_disable_interrupts(card); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1751 | } |
| 1752 | |
| 1753 | /** |
| 1754 | * spider_net_enable_card - enables the card by setting all kinds of regs |
| 1755 | * @card: card structure |
| 1756 | * |
| 1757 | * spider_net_enable_card sets a lot of SMMIO registers to enable the device |
| 1758 | */ |
| 1759 | static void |
| 1760 | spider_net_enable_card(struct spider_net_card *card) |
| 1761 | { |
| 1762 | int i; |
| 1763 | /* the following array consists of (register),(value) pairs |
| 1764 | * that are set in this function. A register of 0 ends the list */ |
| 1765 | u32 regs[][2] = { |
| 1766 | { SPIDER_NET_GRESUMINTNUM, 0 }, |
| 1767 | { SPIDER_NET_GREINTNUM, 0 }, |
| 1768 | |
| 1769 | /* set interrupt frame number registers */ |
| 1770 | /* clear the single DMA engine registers first */ |
| 1771 | { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, |
| 1772 | { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, |
| 1773 | { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, |
| 1774 | { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, |
| 1775 | /* then set, what we really need */ |
| 1776 | { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, |
| 1777 | |
| 1778 | /* timer counter registers and stuff */ |
| 1779 | { SPIDER_NET_GFREECNNUM, 0 }, |
| 1780 | { SPIDER_NET_GONETIMENUM, 0 }, |
| 1781 | { SPIDER_NET_GTOUTFRMNUM, 0 }, |
| 1782 | |
| 1783 | /* RX mode setting */ |
| 1784 | { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, |
| 1785 | /* TX mode setting */ |
| 1786 | { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, |
| 1787 | /* IPSEC mode setting */ |
| 1788 | { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, |
| 1789 | |
| 1790 | { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, |
| 1791 | |
| 1792 | { SPIDER_NET_GMRWOLCTRL, 0 }, |
Jens Osterkamp | b636d17 | 2006-05-04 05:59:56 -0400 | [diff] [blame] | 1793 | { SPIDER_NET_GTESTMD, 0x10000000 }, |
| 1794 | { SPIDER_NET_GTTQMSK, 0x00400040 }, |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1795 | |
| 1796 | { SPIDER_NET_GMACINTEN, 0 }, |
| 1797 | |
| 1798 | /* flow control stuff */ |
| 1799 | { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, |
| 1800 | { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, |
| 1801 | |
| 1802 | { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, |
| 1803 | { 0, 0} |
| 1804 | }; |
| 1805 | |
| 1806 | i = 0; |
| 1807 | while (regs[i][0]) { |
| 1808 | spider_net_write_reg(card, regs[i][0], regs[i][1]); |
| 1809 | i++; |
| 1810 | } |
| 1811 | |
| 1812 | /* clear unicast filter table entries 1 to 14 */ |
| 1813 | for (i = 1; i <= 14; i++) { |
| 1814 | spider_net_write_reg(card, |
| 1815 | SPIDER_NET_GMRUAFILnR + i * 8, |
| 1816 | 0x00080000); |
| 1817 | spider_net_write_reg(card, |
| 1818 | SPIDER_NET_GMRUAFILnR + i * 8 + 4, |
| 1819 | 0x00000000); |
| 1820 | } |
| 1821 | |
| 1822 | spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); |
| 1823 | |
| 1824 | spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); |
| 1825 | |
| 1826 | /* set chain tail adress for RX chains and |
| 1827 | * enable DMA */ |
| 1828 | spider_net_enable_rxchtails(card); |
| 1829 | spider_net_enable_rxdmac(card); |
| 1830 | |
| 1831 | spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); |
| 1832 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1833 | spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, |
| 1834 | SPIDER_NET_LENLMT_VALUE); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1835 | spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, |
| 1836 | SPIDER_NET_OPMODE_VALUE); |
| 1837 | |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 1838 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
Linas Vepstas | 7bd54c8 | 2006-11-17 14:39:40 -0800 | [diff] [blame] | 1839 | SPIDER_NET_GDTBSTA); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1840 | } |
| 1841 | |
| 1842 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1843 | * spider_net_download_firmware - loads firmware into the adapter |
| 1844 | * @card: card structure |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1845 | * @firmware_ptr: pointer to firmware data |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1846 | * |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1847 | * spider_net_download_firmware loads the firmware data into the |
| 1848 | * adapter. It assumes the length etc. to be allright. |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1849 | */ |
Arnd Bergmann | 0d3ea16 | 2006-01-12 17:16:41 -0500 | [diff] [blame] | 1850 | static int |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1851 | spider_net_download_firmware(struct spider_net_card *card, |
Jeremy Kerr | 1a2509c | 2006-07-12 15:41:03 +1000 | [diff] [blame] | 1852 | const void *firmware_ptr) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1853 | { |
| 1854 | int sequencer, i; |
Jeremy Kerr | 1a2509c | 2006-07-12 15:41:03 +1000 | [diff] [blame] | 1855 | const u32 *fw_ptr = firmware_ptr; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1856 | |
| 1857 | /* stop sequencers */ |
| 1858 | spider_net_write_reg(card, SPIDER_NET_GSINIT, |
| 1859 | SPIDER_NET_STOP_SEQ_VALUE); |
| 1860 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1861 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
| 1862 | sequencer++) { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1863 | spider_net_write_reg(card, |
| 1864 | SPIDER_NET_GSnPRGADR + sequencer * 8, 0); |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1865 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1866 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
| 1867 | sequencer * 8, *fw_ptr); |
| 1868 | fw_ptr++; |
| 1869 | } |
| 1870 | } |
| 1871 | |
Arnd Bergmann | 0d3ea16 | 2006-01-12 17:16:41 -0500 | [diff] [blame] | 1872 | if (spider_net_read_reg(card, SPIDER_NET_GSINIT)) |
| 1873 | return -EIO; |
| 1874 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1875 | spider_net_write_reg(card, SPIDER_NET_GSINIT, |
| 1876 | SPIDER_NET_RUN_SEQ_VALUE); |
Arnd Bergmann | 0d3ea16 | 2006-01-12 17:16:41 -0500 | [diff] [blame] | 1877 | |
| 1878 | return 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1879 | } |
| 1880 | |
| 1881 | /** |
| 1882 | * spider_net_init_firmware - reads in firmware parts |
| 1883 | * @card: card structure |
| 1884 | * |
| 1885 | * Returns 0 on success, <0 on failure |
| 1886 | * |
| 1887 | * spider_net_init_firmware opens the sequencer firmware and does some basic |
| 1888 | * checks. This function opens and releases the firmware structure. A call |
| 1889 | * to download the firmware is performed before the release. |
| 1890 | * |
| 1891 | * Firmware format |
| 1892 | * =============== |
| 1893 | * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being |
| 1894 | * the program for each sequencer. Use the command |
| 1895 | * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \ |
| 1896 | * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \ |
| 1897 | * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin |
| 1898 | * |
| 1899 | * to generate spider_fw.bin, if you have sequencer programs with something |
| 1900 | * like the following contents for each sequencer: |
| 1901 | * <ONE LINE COMMENT> |
| 1902 | * <FIRST 4-BYTES-WORD FOR SEQUENCER> |
| 1903 | * <SECOND 4-BYTES-WORD FOR SEQUENCER> |
| 1904 | * ... |
| 1905 | * <1024th 4-BYTES-WORD FOR SEQUENCER> |
| 1906 | */ |
| 1907 | static int |
| 1908 | spider_net_init_firmware(struct spider_net_card *card) |
| 1909 | { |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1910 | struct firmware *firmware = NULL; |
Arnd Bergmann | 030d675 | 2006-01-12 17:16:42 -0500 | [diff] [blame] | 1911 | struct device_node *dn; |
Jeremy Kerr | 1a2509c | 2006-07-12 15:41:03 +1000 | [diff] [blame] | 1912 | const u8 *fw_prop = NULL; |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1913 | int err = -ENOENT; |
| 1914 | int fw_size; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1915 | |
Arnd Bergmann | 030d675 | 2006-01-12 17:16:42 -0500 | [diff] [blame] | 1916 | if (request_firmware((const struct firmware **)&firmware, |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1917 | SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) { |
| 1918 | if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) && |
| 1919 | netif_msg_probe(card) ) { |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1920 | dev_err(&card->netdev->dev, |
| 1921 | "Incorrect size of spidernet firmware in " \ |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1922 | "filesystem. Looking in host firmware...\n"); |
| 1923 | goto try_host_fw; |
| 1924 | } |
| 1925 | err = spider_net_download_firmware(card, firmware->data); |
Arnd Bergmann | 030d675 | 2006-01-12 17:16:42 -0500 | [diff] [blame] | 1926 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1927 | release_firmware(firmware); |
| 1928 | if (err) |
| 1929 | goto try_host_fw; |
Arnd Bergmann | 030d675 | 2006-01-12 17:16:42 -0500 | [diff] [blame] | 1930 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1931 | goto done; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1932 | } |
| 1933 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1934 | try_host_fw: |
| 1935 | dn = pci_device_to_OF_node(card->pdev); |
| 1936 | if (!dn) |
| 1937 | goto out_err; |
| 1938 | |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 1939 | fw_prop = of_get_property(dn, "firmware", &fw_size); |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1940 | if (!fw_prop) |
| 1941 | goto out_err; |
| 1942 | |
| 1943 | if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && |
| 1944 | netif_msg_probe(card) ) { |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1945 | dev_err(&card->netdev->dev, |
| 1946 | "Incorrect size of spidernet firmware in host firmware\n"); |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1947 | goto done; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1948 | } |
| 1949 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1950 | err = spider_net_download_firmware(card, fw_prop); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1951 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1952 | done: |
| 1953 | return err; |
| 1954 | out_err: |
| 1955 | if (netif_msg_probe(card)) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 1956 | dev_err(&card->netdev->dev, |
| 1957 | "Couldn't find spidernet firmware in filesystem " \ |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 1958 | "or host firmware\n"); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 1959 | return err; |
| 1960 | } |
| 1961 | |
| 1962 | /** |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 1963 | * spider_net_open - called upon ifonfig up |
| 1964 | * @netdev: interface device structure |
| 1965 | * |
| 1966 | * returns 0 on success, <0 on failure |
| 1967 | * |
| 1968 | * spider_net_open allocates all the descriptors and memory needed for |
| 1969 | * operation, sets up multicast list and enables interrupts |
| 1970 | */ |
| 1971 | int |
| 1972 | spider_net_open(struct net_device *netdev) |
| 1973 | { |
| 1974 | struct spider_net_card *card = netdev_priv(netdev); |
| 1975 | int result; |
| 1976 | |
| 1977 | result = spider_net_init_firmware(card); |
| 1978 | if (result) |
| 1979 | goto init_firmware_failed; |
| 1980 | |
| 1981 | /* start probing with copper */ |
Ishizaki Kou | 81971be | 2008-04-11 12:27:34 +0900 | [diff] [blame] | 1982 | card->aneg_count = 0; |
| 1983 | card->medium = BCM54XX_COPPER; |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 1984 | spider_net_setup_aneg(card); |
| 1985 | if (card->phy.def->phy_id) |
| 1986 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); |
| 1987 | |
| 1988 | result = spider_net_init_chain(card, &card->tx_chain); |
| 1989 | if (result) |
| 1990 | goto alloc_tx_failed; |
| 1991 | card->low_watermark = NULL; |
| 1992 | |
| 1993 | result = spider_net_init_chain(card, &card->rx_chain); |
| 1994 | if (result) |
| 1995 | goto alloc_rx_failed; |
| 1996 | |
| 1997 | /* Allocate rx skbs */ |
| 1998 | if (spider_net_alloc_rx_skbs(card)) |
| 1999 | goto alloc_skbs_failed; |
| 2000 | |
| 2001 | spider_net_set_multi(netdev); |
| 2002 | |
| 2003 | /* further enhancement: setup hw vlan, if needed */ |
| 2004 | |
| 2005 | result = -EBUSY; |
| 2006 | if (request_irq(netdev->irq, spider_net_interrupt, |
| 2007 | IRQF_SHARED, netdev->name, netdev)) |
| 2008 | goto register_int_failed; |
| 2009 | |
| 2010 | spider_net_enable_card(card); |
| 2011 | |
| 2012 | netif_start_queue(netdev); |
| 2013 | netif_carrier_on(netdev); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2014 | napi_enable(&card->napi); |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2015 | |
Ishizaki Kou | 7a62755 | 2007-07-09 18:17:42 -0500 | [diff] [blame] | 2016 | spider_net_enable_interrupts(card); |
| 2017 | |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2018 | return 0; |
| 2019 | |
| 2020 | register_int_failed: |
| 2021 | spider_net_free_rx_chain_contents(card); |
| 2022 | alloc_skbs_failed: |
| 2023 | spider_net_free_chain(card, &card->rx_chain); |
| 2024 | alloc_rx_failed: |
| 2025 | spider_net_free_chain(card, &card->tx_chain); |
| 2026 | alloc_tx_failed: |
| 2027 | del_timer_sync(&card->aneg_timer); |
| 2028 | init_firmware_failed: |
| 2029 | return result; |
| 2030 | } |
| 2031 | |
| 2032 | /** |
| 2033 | * spider_net_link_phy |
| 2034 | * @data: used for pointer to card structure |
| 2035 | * |
| 2036 | */ |
| 2037 | static void spider_net_link_phy(unsigned long data) |
| 2038 | { |
| 2039 | struct spider_net_card *card = (struct spider_net_card *)data; |
| 2040 | struct mii_phy *phy = &card->phy; |
| 2041 | |
| 2042 | /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */ |
| 2043 | if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) { |
| 2044 | |
Ishizaki Kou | 0b50d75 | 2008-04-11 12:33:53 +0900 | [diff] [blame] | 2045 | pr_debug("%s: link is down trying to bring it up\n", |
| 2046 | card->netdev->name); |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2047 | |
Jens Osterkamp | 4b23a55 | 2007-02-20 16:39:13 -0600 | [diff] [blame] | 2048 | switch (card->medium) { |
| 2049 | case BCM54XX_COPPER: |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2050 | /* enable fiber with autonegotiation first */ |
| 2051 | if (phy->def->ops->enable_fiber) |
| 2052 | phy->def->ops->enable_fiber(phy, 1); |
Jens Osterkamp | 4b23a55 | 2007-02-20 16:39:13 -0600 | [diff] [blame] | 2053 | card->medium = BCM54XX_FIBER; |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2054 | break; |
| 2055 | |
Jens Osterkamp | 4b23a55 | 2007-02-20 16:39:13 -0600 | [diff] [blame] | 2056 | case BCM54XX_FIBER: |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2057 | /* fiber didn't come up, try to disable fiber autoneg */ |
| 2058 | if (phy->def->ops->enable_fiber) |
| 2059 | phy->def->ops->enable_fiber(phy, 0); |
Jens Osterkamp | 4b23a55 | 2007-02-20 16:39:13 -0600 | [diff] [blame] | 2060 | card->medium = BCM54XX_UNKNOWN; |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2061 | break; |
| 2062 | |
Jens Osterkamp | 4b23a55 | 2007-02-20 16:39:13 -0600 | [diff] [blame] | 2063 | case BCM54XX_UNKNOWN: |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2064 | /* copper, fiber with and without failed, |
| 2065 | * retry from beginning */ |
| 2066 | spider_net_setup_aneg(card); |
Jens Osterkamp | 4b23a55 | 2007-02-20 16:39:13 -0600 | [diff] [blame] | 2067 | card->medium = BCM54XX_COPPER; |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2068 | break; |
| 2069 | } |
| 2070 | |
| 2071 | card->aneg_count = 0; |
| 2072 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); |
| 2073 | return; |
| 2074 | } |
| 2075 | |
| 2076 | /* link still not up, try again later */ |
| 2077 | if (!(phy->def->ops->poll_link(phy))) { |
| 2078 | card->aneg_count++; |
| 2079 | mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER); |
| 2080 | return; |
| 2081 | } |
| 2082 | |
| 2083 | /* link came up, get abilities */ |
| 2084 | phy->def->ops->read_link(phy); |
| 2085 | |
| 2086 | spider_net_write_reg(card, SPIDER_NET_GMACST, |
| 2087 | spider_net_read_reg(card, SPIDER_NET_GMACST)); |
| 2088 | spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4); |
| 2089 | |
| 2090 | if (phy->speed == 1000) |
| 2091 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001); |
| 2092 | else |
| 2093 | spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0); |
| 2094 | |
| 2095 | card->aneg_count = 0; |
| 2096 | |
Ishizaki Kou | 0b50d75 | 2008-04-11 12:33:53 +0900 | [diff] [blame] | 2097 | pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n", |
| 2098 | card->netdev->name, phy->speed, |
| 2099 | phy->duplex == 1 ? "Full" : "Half", |
| 2100 | phy->autoneg == 1 ? "" : "no "); |
Kou Ishizaki | 3cf761d | 2007-02-20 16:34:50 -0600 | [diff] [blame] | 2101 | |
| 2102 | return; |
| 2103 | } |
| 2104 | |
| 2105 | /** |
| 2106 | * spider_net_setup_phy - setup PHY |
| 2107 | * @card: card structure |
| 2108 | * |
| 2109 | * returns 0 on success, <0 on failure |
| 2110 | * |
| 2111 | * spider_net_setup_phy is used as part of spider_net_probe. |
| 2112 | **/ |
| 2113 | static int |
| 2114 | spider_net_setup_phy(struct spider_net_card *card) |
| 2115 | { |
| 2116 | struct mii_phy *phy = &card->phy; |
| 2117 | |
| 2118 | spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, |
| 2119 | SPIDER_NET_DMASEL_VALUE); |
| 2120 | spider_net_write_reg(card, SPIDER_NET_GPCCTRL, |
| 2121 | SPIDER_NET_PHY_CTRL_VALUE); |
| 2122 | |
| 2123 | phy->dev = card->netdev; |
| 2124 | phy->mdio_read = spider_net_read_phy; |
| 2125 | phy->mdio_write = spider_net_write_phy; |
| 2126 | |
| 2127 | for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) { |
| 2128 | unsigned short id; |
| 2129 | id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); |
| 2130 | if (id != 0x0000 && id != 0xffff) { |
| 2131 | if (!mii_phy_probe(phy, phy->mii_id)) { |
| 2132 | pr_info("Found %s.\n", phy->def->name); |
| 2133 | break; |
| 2134 | } |
| 2135 | } |
| 2136 | } |
| 2137 | |
| 2138 | return 0; |
| 2139 | } |
| 2140 | |
| 2141 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2142 | * spider_net_workaround_rxramfull - work around firmware bug |
| 2143 | * @card: card structure |
| 2144 | * |
| 2145 | * no return value |
| 2146 | **/ |
| 2147 | static void |
| 2148 | spider_net_workaround_rxramfull(struct spider_net_card *card) |
| 2149 | { |
| 2150 | int i, sequencer = 0; |
| 2151 | |
| 2152 | /* cancel reset */ |
| 2153 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
| 2154 | SPIDER_NET_CKRCTRL_RUN_VALUE); |
| 2155 | |
| 2156 | /* empty sequencer data */ |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 2157 | for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; |
| 2158 | sequencer++) { |
Jens Osterkamp | ee962a5 | 2006-07-13 11:54:23 +0200 | [diff] [blame] | 2159 | spider_net_write_reg(card, SPIDER_NET_GSnPRGADR + |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2160 | sequencer * 8, 0x0); |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 2161 | for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2162 | spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + |
| 2163 | sequencer * 8, 0x0); |
| 2164 | } |
| 2165 | } |
| 2166 | |
| 2167 | /* set sequencer operation */ |
| 2168 | spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe); |
| 2169 | |
| 2170 | /* reset */ |
| 2171 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
| 2172 | SPIDER_NET_CKRCTRL_STOP_VALUE); |
| 2173 | } |
| 2174 | |
| 2175 | /** |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 2176 | * spider_net_stop - called upon ifconfig down |
| 2177 | * @netdev: interface device structure |
| 2178 | * |
| 2179 | * always returns 0 |
| 2180 | */ |
| 2181 | int |
| 2182 | spider_net_stop(struct net_device *netdev) |
| 2183 | { |
| 2184 | struct spider_net_card *card = netdev_priv(netdev); |
| 2185 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2186 | napi_disable(&card->napi); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 2187 | netif_carrier_off(netdev); |
| 2188 | netif_stop_queue(netdev); |
| 2189 | del_timer_sync(&card->tx_timer); |
Kou Ishizaki | abdb66b | 2007-02-20 16:33:41 -0600 | [diff] [blame] | 2190 | del_timer_sync(&card->aneg_timer); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 2191 | |
Ishizaki Kou | 7a62755 | 2007-07-09 18:17:42 -0500 | [diff] [blame] | 2192 | spider_net_disable_interrupts(card); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 2193 | |
Linas Vepstas | d406eaf | 2007-02-20 16:32:00 -0600 | [diff] [blame] | 2194 | free_irq(netdev->irq, netdev); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 2195 | |
| 2196 | spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, |
| 2197 | SPIDER_NET_DMA_TX_FEND_VALUE); |
| 2198 | |
| 2199 | /* turn off DMA, force end */ |
| 2200 | spider_net_disable_rxdmac(card); |
| 2201 | |
| 2202 | /* release chains */ |
Linas Vepstas | 9cc7bf7 | 2006-10-10 16:14:29 -0500 | [diff] [blame] | 2203 | spider_net_release_tx_chain(card, 1); |
Linas Vepstas | d4ed8f8 | 2006-12-13 15:06:59 -0600 | [diff] [blame] | 2204 | spider_net_free_rx_chain_contents(card); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 2205 | |
| 2206 | spider_net_free_chain(card, &card->tx_chain); |
| 2207 | spider_net_free_chain(card, &card->rx_chain); |
| 2208 | |
| 2209 | return 0; |
| 2210 | } |
| 2211 | |
| 2212 | /** |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2213 | * spider_net_tx_timeout_task - task scheduled by the watchdog timeout |
| 2214 | * function (to be called not under interrupt status) |
| 2215 | * @data: data, is interface device structure |
| 2216 | * |
| 2217 | * called as task when tx hangs, resets interface (if interface is up) |
| 2218 | */ |
| 2219 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2220 | spider_net_tx_timeout_task(struct work_struct *work) |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2221 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2222 | struct spider_net_card *card = |
| 2223 | container_of(work, struct spider_net_card, tx_timeout_task); |
| 2224 | struct net_device *netdev = card->netdev; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2225 | |
| 2226 | if (!(netdev->flags & IFF_UP)) |
| 2227 | goto out; |
| 2228 | |
| 2229 | netif_device_detach(netdev); |
| 2230 | spider_net_stop(netdev); |
| 2231 | |
| 2232 | spider_net_workaround_rxramfull(card); |
| 2233 | spider_net_init_card(card); |
| 2234 | |
| 2235 | if (spider_net_setup_phy(card)) |
| 2236 | goto out; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2237 | |
| 2238 | spider_net_open(netdev); |
Jens Osterkamp | bdd0150 | 2006-07-13 11:54:08 +0200 | [diff] [blame] | 2239 | spider_net_kick_tx_dma(card); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2240 | netif_device_attach(netdev); |
| 2241 | |
| 2242 | out: |
| 2243 | atomic_dec(&card->tx_timeout_task_counter); |
| 2244 | } |
| 2245 | |
| 2246 | /** |
| 2247 | * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. |
| 2248 | * @netdev: interface device structure |
| 2249 | * |
| 2250 | * called, if tx hangs. Schedules a task that resets the interface |
| 2251 | */ |
| 2252 | static void |
| 2253 | spider_net_tx_timeout(struct net_device *netdev) |
| 2254 | { |
| 2255 | struct spider_net_card *card; |
| 2256 | |
| 2257 | card = netdev_priv(netdev); |
| 2258 | atomic_inc(&card->tx_timeout_task_counter); |
| 2259 | if (netdev->flags & IFF_UP) |
| 2260 | schedule_work(&card->tx_timeout_task); |
| 2261 | else |
| 2262 | atomic_dec(&card->tx_timeout_task_counter); |
Jim Lewis | 9b6b0b8 | 2006-09-22 17:22:53 -0700 | [diff] [blame] | 2263 | card->spider_stats.tx_timeouts++; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2264 | } |
| 2265 | |
| 2266 | /** |
| 2267 | * spider_net_setup_netdev_ops - initialization of net_device operations |
| 2268 | * @netdev: net_device structure |
| 2269 | * |
| 2270 | * fills out function pointers in the net_device structure |
| 2271 | */ |
| 2272 | static void |
| 2273 | spider_net_setup_netdev_ops(struct net_device *netdev) |
| 2274 | { |
| 2275 | netdev->open = &spider_net_open; |
| 2276 | netdev->stop = &spider_net_stop; |
| 2277 | netdev->hard_start_xmit = &spider_net_xmit; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2278 | netdev->set_multicast_list = &spider_net_set_multi; |
| 2279 | netdev->set_mac_address = &spider_net_set_mac; |
| 2280 | netdev->change_mtu = &spider_net_change_mtu; |
| 2281 | netdev->do_ioctl = &spider_net_do_ioctl; |
| 2282 | /* tx watchdog */ |
| 2283 | netdev->tx_timeout = &spider_net_tx_timeout; |
| 2284 | netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2285 | /* HW VLAN */ |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2286 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 2287 | /* poll controller */ |
| 2288 | netdev->poll_controller = &spider_net_poll_controller; |
| 2289 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
| 2290 | /* ethtool ops */ |
| 2291 | netdev->ethtool_ops = &spider_net_ethtool_ops; |
| 2292 | } |
| 2293 | |
| 2294 | /** |
| 2295 | * spider_net_setup_netdev - initialization of net_device |
| 2296 | * @card: card structure |
| 2297 | * |
| 2298 | * Returns 0 on success or <0 on failure |
| 2299 | * |
| 2300 | * spider_net_setup_netdev initializes the net_device structure |
| 2301 | **/ |
| 2302 | static int |
| 2303 | spider_net_setup_netdev(struct spider_net_card *card) |
| 2304 | { |
| 2305 | int result; |
| 2306 | struct net_device *netdev = card->netdev; |
| 2307 | struct device_node *dn; |
| 2308 | struct sockaddr addr; |
Jeremy Kerr | 1a2509c | 2006-07-12 15:41:03 +1000 | [diff] [blame] | 2309 | const u8 *mac; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2310 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2311 | SET_NETDEV_DEV(netdev, &card->pdev->dev); |
| 2312 | |
| 2313 | pci_set_drvdata(card->pdev, netdev); |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 2314 | |
Arnd Bergmann | 11f1a52 | 2006-01-12 17:16:44 -0500 | [diff] [blame] | 2315 | init_timer(&card->tx_timer); |
| 2316 | card->tx_timer.function = |
| 2317 | (void (*)(unsigned long)) spider_net_cleanup_tx_ring; |
| 2318 | card->tx_timer.data = (unsigned long) card; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2319 | netdev->irq = card->pdev->irq; |
| 2320 | |
Kou Ishizaki | abdb66b | 2007-02-20 16:33:41 -0600 | [diff] [blame] | 2321 | card->aneg_count = 0; |
| 2322 | init_timer(&card->aneg_timer); |
| 2323 | card->aneg_timer.function = spider_net_link_phy; |
| 2324 | card->aneg_timer.data = (unsigned long) card; |
| 2325 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2326 | card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT; |
| 2327 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2328 | netif_napi_add(netdev, &card->napi, |
| 2329 | spider_net_poll, SPIDER_NET_NAPI_WEIGHT); |
| 2330 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2331 | spider_net_setup_netdev_ops(netdev); |
| 2332 | |
Stephen Hemminger | 3a2c892 | 2007-06-11 13:35:23 -0500 | [diff] [blame] | 2333 | netdev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2334 | /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | |
| 2335 | * NETIF_F_HW_VLAN_FILTER */ |
| 2336 | |
| 2337 | netdev->irq = card->pdev->irq; |
Linas Vepstas | 4c4bd5a | 2007-06-11 13:21:13 -0500 | [diff] [blame] | 2338 | card->num_rx_ints = 0; |
Linas Vepstas | c3d1182 | 2007-06-11 13:26:50 -0500 | [diff] [blame] | 2339 | card->ignore_rx_ramfull = 0; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2340 | |
| 2341 | dn = pci_device_to_OF_node(card->pdev); |
Jens Osterkamp | 543cec5 | 2005-09-06 19:30:54 -0700 | [diff] [blame] | 2342 | if (!dn) |
| 2343 | return -EIO; |
| 2344 | |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 2345 | mac = of_get_property(dn, "local-mac-address", NULL); |
Jens Osterkamp | 543cec5 | 2005-09-06 19:30:54 -0700 | [diff] [blame] | 2346 | if (!mac) |
| 2347 | return -EIO; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2348 | memcpy(addr.sa_data, mac, ETH_ALEN); |
| 2349 | |
| 2350 | result = spider_net_set_mac(netdev, &addr); |
| 2351 | if ((result) && (netif_msg_probe(card))) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 2352 | dev_err(&card->netdev->dev, |
| 2353 | "Failed to set MAC address: %i\n", result); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2354 | |
| 2355 | result = register_netdev(netdev); |
| 2356 | if (result) { |
| 2357 | if (netif_msg_probe(card)) |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 2358 | dev_err(&card->netdev->dev, |
| 2359 | "Couldn't register net_device: %i\n", result); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2360 | return result; |
| 2361 | } |
| 2362 | |
| 2363 | if (netif_msg_probe(card)) |
| 2364 | pr_info("Initialized device %s.\n", netdev->name); |
| 2365 | |
| 2366 | return 0; |
| 2367 | } |
| 2368 | |
| 2369 | /** |
| 2370 | * spider_net_alloc_card - allocates net_device and card structure |
| 2371 | * |
| 2372 | * returns the card structure or NULL in case of errors |
| 2373 | * |
| 2374 | * the card and net_device structures are linked to each other |
| 2375 | */ |
| 2376 | static struct spider_net_card * |
| 2377 | spider_net_alloc_card(void) |
| 2378 | { |
| 2379 | struct net_device *netdev; |
| 2380 | struct spider_net_card *card; |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 2381 | size_t alloc_size; |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2382 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 2383 | alloc_size = sizeof(struct spider_net_card) + |
| 2384 | (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr); |
| 2385 | netdev = alloc_etherdev(alloc_size); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2386 | if (!netdev) |
| 2387 | return NULL; |
| 2388 | |
| 2389 | card = netdev_priv(netdev); |
| 2390 | card->netdev = netdev; |
| 2391 | card->msg_enable = SPIDER_NET_DEFAULT_MSG; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2392 | INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2393 | init_waitqueue_head(&card->waitq); |
| 2394 | atomic_set(&card->tx_timeout_task_counter, 0); |
| 2395 | |
Linas Vepstas | 4cb6f9e | 2007-02-20 16:40:06 -0600 | [diff] [blame] | 2396 | card->rx_chain.num_desc = rx_descriptors; |
| 2397 | card->rx_chain.ring = card->darray; |
| 2398 | card->tx_chain.num_desc = tx_descriptors; |
| 2399 | card->tx_chain.ring = card->darray + rx_descriptors; |
| 2400 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2401 | return card; |
| 2402 | } |
| 2403 | |
| 2404 | /** |
| 2405 | * spider_net_undo_pci_setup - releases PCI ressources |
| 2406 | * @card: card structure |
| 2407 | * |
| 2408 | * spider_net_undo_pci_setup releases the mapped regions |
| 2409 | */ |
| 2410 | static void |
| 2411 | spider_net_undo_pci_setup(struct spider_net_card *card) |
| 2412 | { |
| 2413 | iounmap(card->regs); |
| 2414 | pci_release_regions(card->pdev); |
| 2415 | } |
| 2416 | |
| 2417 | /** |
| 2418 | * spider_net_setup_pci_dev - sets up the device in terms of PCI operations |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2419 | * @pdev: PCI device |
| 2420 | * |
| 2421 | * Returns the card structure or NULL if any errors occur |
| 2422 | * |
| 2423 | * spider_net_setup_pci_dev initializes pdev and together with the |
| 2424 | * functions called in spider_net_open configures the device so that |
| 2425 | * data can be transferred over it |
| 2426 | * The net_device structure is attached to the card structure, if the |
| 2427 | * function returns without error. |
| 2428 | **/ |
| 2429 | static struct spider_net_card * |
| 2430 | spider_net_setup_pci_dev(struct pci_dev *pdev) |
| 2431 | { |
| 2432 | struct spider_net_card *card; |
| 2433 | unsigned long mmio_start, mmio_len; |
| 2434 | |
| 2435 | if (pci_enable_device(pdev)) { |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 2436 | dev_err(&pdev->dev, "Couldn't enable PCI device\n"); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2437 | return NULL; |
| 2438 | } |
| 2439 | |
| 2440 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 2441 | dev_err(&pdev->dev, |
| 2442 | "Couldn't find proper PCI device base address.\n"); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2443 | goto out_disable_dev; |
| 2444 | } |
| 2445 | |
| 2446 | if (pci_request_regions(pdev, spider_net_driver_name)) { |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 2447 | dev_err(&pdev->dev, |
| 2448 | "Couldn't obtain PCI resources, aborting.\n"); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2449 | goto out_disable_dev; |
| 2450 | } |
| 2451 | |
| 2452 | pci_set_master(pdev); |
| 2453 | |
| 2454 | card = spider_net_alloc_card(); |
| 2455 | if (!card) { |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 2456 | dev_err(&pdev->dev, |
| 2457 | "Couldn't allocate net_device structure, aborting.\n"); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2458 | goto out_release_regions; |
| 2459 | } |
| 2460 | card->pdev = pdev; |
| 2461 | |
| 2462 | /* fetch base address and length of first resource */ |
| 2463 | mmio_start = pci_resource_start(pdev, 0); |
| 2464 | mmio_len = pci_resource_len(pdev, 0); |
| 2465 | |
| 2466 | card->netdev->mem_start = mmio_start; |
| 2467 | card->netdev->mem_end = mmio_start + mmio_len; |
| 2468 | card->regs = ioremap(mmio_start, mmio_len); |
| 2469 | |
| 2470 | if (!card->regs) { |
Linas Vepstas | e6311d8 | 2007-06-11 13:41:38 -0500 | [diff] [blame] | 2471 | dev_err(&pdev->dev, |
| 2472 | "Couldn't obtain PCI resources, aborting.\n"); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2473 | goto out_release_regions; |
| 2474 | } |
| 2475 | |
| 2476 | return card; |
| 2477 | |
| 2478 | out_release_regions: |
| 2479 | pci_release_regions(pdev); |
| 2480 | out_disable_dev: |
| 2481 | pci_disable_device(pdev); |
| 2482 | pci_set_drvdata(pdev, NULL); |
| 2483 | return NULL; |
| 2484 | } |
| 2485 | |
| 2486 | /** |
| 2487 | * spider_net_probe - initialization of a device |
| 2488 | * @pdev: PCI device |
| 2489 | * @ent: entry in the device id list |
| 2490 | * |
| 2491 | * Returns 0 on success, <0 on failure |
| 2492 | * |
| 2493 | * spider_net_probe initializes pdev and registers a net_device |
| 2494 | * structure for it. After that, the device can be ifconfig'ed up |
| 2495 | **/ |
| 2496 | static int __devinit |
| 2497 | spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| 2498 | { |
| 2499 | int err = -EIO; |
| 2500 | struct spider_net_card *card; |
| 2501 | |
| 2502 | card = spider_net_setup_pci_dev(pdev); |
| 2503 | if (!card) |
| 2504 | goto out; |
| 2505 | |
| 2506 | spider_net_workaround_rxramfull(card); |
| 2507 | spider_net_init_card(card); |
| 2508 | |
| 2509 | err = spider_net_setup_phy(card); |
| 2510 | if (err) |
| 2511 | goto out_undo_pci; |
| 2512 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2513 | err = spider_net_setup_netdev(card); |
| 2514 | if (err) |
| 2515 | goto out_undo_pci; |
| 2516 | |
| 2517 | return 0; |
| 2518 | |
| 2519 | out_undo_pci: |
| 2520 | spider_net_undo_pci_setup(card); |
| 2521 | free_netdev(card->netdev); |
| 2522 | out: |
| 2523 | return err; |
| 2524 | } |
| 2525 | |
| 2526 | /** |
| 2527 | * spider_net_remove - removal of a device |
| 2528 | * @pdev: PCI device |
| 2529 | * |
| 2530 | * Returns 0 on success, <0 on failure |
| 2531 | * |
| 2532 | * spider_net_remove is called to remove the device and unregisters the |
| 2533 | * net_device |
| 2534 | **/ |
| 2535 | static void __devexit |
| 2536 | spider_net_remove(struct pci_dev *pdev) |
| 2537 | { |
| 2538 | struct net_device *netdev; |
| 2539 | struct spider_net_card *card; |
| 2540 | |
| 2541 | netdev = pci_get_drvdata(pdev); |
| 2542 | card = netdev_priv(netdev); |
| 2543 | |
| 2544 | wait_event(card->waitq, |
| 2545 | atomic_read(&card->tx_timeout_task_counter) == 0); |
| 2546 | |
| 2547 | unregister_netdev(netdev); |
Jens Osterkamp | 543cec5 | 2005-09-06 19:30:54 -0700 | [diff] [blame] | 2548 | |
| 2549 | /* switch off card */ |
| 2550 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
| 2551 | SPIDER_NET_CKRCTRL_STOP_VALUE); |
| 2552 | spider_net_write_reg(card, SPIDER_NET_CKRCTRL, |
| 2553 | SPIDER_NET_CKRCTRL_RUN_VALUE); |
| 2554 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2555 | spider_net_undo_pci_setup(card); |
| 2556 | free_netdev(netdev); |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2557 | } |
| 2558 | |
| 2559 | static struct pci_driver spider_net_driver = { |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2560 | .name = spider_net_driver_name, |
| 2561 | .id_table = spider_net_pci_tbl, |
| 2562 | .probe = spider_net_probe, |
| 2563 | .remove = __devexit_p(spider_net_remove) |
| 2564 | }; |
| 2565 | |
| 2566 | /** |
| 2567 | * spider_net_init - init function when the driver is loaded |
| 2568 | * |
| 2569 | * spider_net_init registers the device driver |
| 2570 | */ |
| 2571 | static int __init spider_net_init(void) |
| 2572 | { |
Linas Vepstas | 90f1084 | 2006-10-10 15:56:04 -0500 | [diff] [blame] | 2573 | printk(KERN_INFO "Spidernet version %s.\n", VERSION); |
| 2574 | |
Jens Osterkamp | aaec0fa | 2005-09-05 15:19:29 -0700 | [diff] [blame] | 2575 | if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) { |
| 2576 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN; |
| 2577 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); |
| 2578 | } |
| 2579 | if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) { |
| 2580 | rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX; |
| 2581 | pr_info("adjusting rx descriptors to %i.\n", rx_descriptors); |
| 2582 | } |
| 2583 | if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) { |
| 2584 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN; |
| 2585 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); |
| 2586 | } |
| 2587 | if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) { |
| 2588 | tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX; |
| 2589 | pr_info("adjusting tx descriptors to %i.\n", tx_descriptors); |
| 2590 | } |
| 2591 | |
| 2592 | return pci_register_driver(&spider_net_driver); |
| 2593 | } |
| 2594 | |
| 2595 | /** |
| 2596 | * spider_net_cleanup - exit function when driver is unloaded |
| 2597 | * |
| 2598 | * spider_net_cleanup unregisters the device driver |
| 2599 | */ |
| 2600 | static void __exit spider_net_cleanup(void) |
| 2601 | { |
| 2602 | pci_unregister_driver(&spider_net_driver); |
| 2603 | } |
| 2604 | |
| 2605 | module_init(spider_net_init); |
| 2606 | module_exit(spider_net_cleanup); |