Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Keystone NetCP Core driver |
| 3 | * |
| 4 | * Copyright (C) 2014 Texas Instruments Incorporated |
| 5 | * Authors: Sandeep Nair <sandeep_n@ti.com> |
| 6 | * Sandeep Paulraj <s-paulraj@ti.com> |
| 7 | * Cyril Chemparathy <cyril@ti.com> |
| 8 | * Santosh Shilimkar <santosh.shilimkar@ti.com> |
| 9 | * Murali Karicheri <m-karicheri2@ti.com> |
| 10 | * Wingman Kwok <w-kwok2@ti.com> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License as |
| 14 | * published by the Free Software Foundation version 2. |
| 15 | * |
| 16 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any |
| 17 | * kind, whether express or implied; without even the implied warranty |
| 18 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/io.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/of_net.h> |
| 25 | #include <linux/of_address.h> |
| 26 | #include <linux/if_vlan.h> |
| 27 | #include <linux/pm_runtime.h> |
| 28 | #include <linux/platform_device.h> |
| 29 | #include <linux/soc/ti/knav_qmss.h> |
| 30 | #include <linux/soc/ti/knav_dma.h> |
| 31 | |
| 32 | #include "netcp.h" |
| 33 | |
| 34 | #define NETCP_SOP_OFFSET (NET_IP_ALIGN + NET_SKB_PAD) |
| 35 | #define NETCP_NAPI_WEIGHT 64 |
| 36 | #define NETCP_TX_TIMEOUT (5 * HZ) |
WingMan Kwok | 866b8b1 | 2015-08-04 16:56:53 -0400 | [diff] [blame] | 37 | #define NETCP_PACKET_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN) |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 38 | #define NETCP_MIN_PACKET_SIZE ETH_ZLEN |
| 39 | #define NETCP_MAX_MCAST_ADDR 16 |
| 40 | |
| 41 | #define NETCP_EFUSE_REG_INDEX 0 |
| 42 | |
| 43 | #define NETCP_MOD_PROBE_SKIPPED 1 |
| 44 | #define NETCP_MOD_PROBE_FAILED 2 |
| 45 | |
| 46 | #define NETCP_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \ |
| 47 | NETIF_MSG_DRV | NETIF_MSG_LINK | \ |
| 48 | NETIF_MSG_IFUP | NETIF_MSG_INTR | \ |
| 49 | NETIF_MSG_PROBE | NETIF_MSG_TIMER | \ |
| 50 | NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \ |
| 51 | NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \ |
| 52 | NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \ |
| 53 | NETIF_MSG_RX_STATUS) |
| 54 | |
| 55 | #define knav_queue_get_id(q) knav_queue_device_control(q, \ |
| 56 | KNAV_QUEUE_GET_ID, (unsigned long)NULL) |
| 57 | |
| 58 | #define knav_queue_enable_notify(q) knav_queue_device_control(q, \ |
| 59 | KNAV_QUEUE_ENABLE_NOTIFY, \ |
| 60 | (unsigned long)NULL) |
| 61 | |
| 62 | #define knav_queue_disable_notify(q) knav_queue_device_control(q, \ |
| 63 | KNAV_QUEUE_DISABLE_NOTIFY, \ |
| 64 | (unsigned long)NULL) |
| 65 | |
| 66 | #define knav_queue_get_count(q) knav_queue_device_control(q, \ |
| 67 | KNAV_QUEUE_GET_COUNT, (unsigned long)NULL) |
| 68 | |
| 69 | #define for_each_netcp_module(module) \ |
| 70 | list_for_each_entry(module, &netcp_modules, module_list) |
| 71 | |
| 72 | #define for_each_netcp_device_module(netcp_device, inst_modpriv) \ |
| 73 | list_for_each_entry(inst_modpriv, \ |
| 74 | &((netcp_device)->modpriv_head), inst_list) |
| 75 | |
| 76 | #define for_each_module(netcp, intf_modpriv) \ |
| 77 | list_for_each_entry(intf_modpriv, &netcp->module_head, intf_list) |
| 78 | |
| 79 | /* Module management structures */ |
| 80 | struct netcp_device { |
| 81 | struct list_head device_list; |
| 82 | struct list_head interface_head; |
| 83 | struct list_head modpriv_head; |
| 84 | struct device *device; |
| 85 | }; |
| 86 | |
| 87 | struct netcp_inst_modpriv { |
| 88 | struct netcp_device *netcp_device; |
| 89 | struct netcp_module *netcp_module; |
| 90 | struct list_head inst_list; |
| 91 | void *module_priv; |
| 92 | }; |
| 93 | |
| 94 | struct netcp_intf_modpriv { |
| 95 | struct netcp_intf *netcp_priv; |
| 96 | struct netcp_module *netcp_module; |
| 97 | struct list_head intf_list; |
| 98 | void *module_priv; |
| 99 | }; |
| 100 | |
| 101 | static LIST_HEAD(netcp_devices); |
| 102 | static LIST_HEAD(netcp_modules); |
| 103 | static DEFINE_MUTEX(netcp_modules_lock); |
| 104 | |
| 105 | static int netcp_debug_level = -1; |
| 106 | module_param(netcp_debug_level, int, 0); |
| 107 | MODULE_PARM_DESC(netcp_debug_level, "Netcp debug level (NETIF_MSG bits) (0=none,...,16=all)"); |
| 108 | |
| 109 | /* Helper functions - Get/Set */ |
| 110 | static void get_pkt_info(u32 *buff, u32 *buff_len, u32 *ndesc, |
| 111 | struct knav_dma_desc *desc) |
| 112 | { |
| 113 | *buff_len = desc->buff_len; |
| 114 | *buff = desc->buff; |
| 115 | *ndesc = desc->next_desc; |
| 116 | } |
| 117 | |
| 118 | static void get_pad_info(u32 *pad0, u32 *pad1, struct knav_dma_desc *desc) |
| 119 | { |
| 120 | *pad0 = desc->pad[0]; |
| 121 | *pad1 = desc->pad[1]; |
| 122 | } |
| 123 | |
| 124 | static void get_org_pkt_info(u32 *buff, u32 *buff_len, |
| 125 | struct knav_dma_desc *desc) |
| 126 | { |
| 127 | *buff = desc->orig_buff; |
| 128 | *buff_len = desc->orig_len; |
| 129 | } |
| 130 | |
| 131 | static void get_words(u32 *words, int num_words, u32 *desc) |
| 132 | { |
| 133 | int i; |
| 134 | |
| 135 | for (i = 0; i < num_words; i++) |
| 136 | words[i] = desc[i]; |
| 137 | } |
| 138 | |
| 139 | static void set_pkt_info(u32 buff, u32 buff_len, u32 ndesc, |
| 140 | struct knav_dma_desc *desc) |
| 141 | { |
| 142 | desc->buff_len = buff_len; |
| 143 | desc->buff = buff; |
| 144 | desc->next_desc = ndesc; |
| 145 | } |
| 146 | |
| 147 | static void set_desc_info(u32 desc_info, u32 pkt_info, |
| 148 | struct knav_dma_desc *desc) |
| 149 | { |
| 150 | desc->desc_info = desc_info; |
| 151 | desc->packet_info = pkt_info; |
| 152 | } |
| 153 | |
| 154 | static void set_pad_info(u32 pad0, u32 pad1, struct knav_dma_desc *desc) |
| 155 | { |
| 156 | desc->pad[0] = pad0; |
| 157 | desc->pad[1] = pad1; |
| 158 | } |
| 159 | |
| 160 | static void set_org_pkt_info(u32 buff, u32 buff_len, |
| 161 | struct knav_dma_desc *desc) |
| 162 | { |
| 163 | desc->orig_buff = buff; |
| 164 | desc->orig_len = buff_len; |
| 165 | } |
| 166 | |
| 167 | static void set_words(u32 *words, int num_words, u32 *desc) |
| 168 | { |
| 169 | int i; |
| 170 | |
| 171 | for (i = 0; i < num_words; i++) |
| 172 | desc[i] = words[i]; |
| 173 | } |
| 174 | |
| 175 | /* Read the e-fuse value as 32 bit values to be endian independent */ |
| 176 | static int emac_arch_get_mac_addr(char *x, void __iomem *efuse_mac) |
| 177 | { |
| 178 | unsigned int addr0, addr1; |
| 179 | |
| 180 | addr1 = readl(efuse_mac + 4); |
| 181 | addr0 = readl(efuse_mac); |
| 182 | |
| 183 | x[0] = (addr1 & 0x0000ff00) >> 8; |
| 184 | x[1] = addr1 & 0x000000ff; |
| 185 | x[2] = (addr0 & 0xff000000) >> 24; |
| 186 | x[3] = (addr0 & 0x00ff0000) >> 16; |
| 187 | x[4] = (addr0 & 0x0000ff00) >> 8; |
| 188 | x[5] = addr0 & 0x000000ff; |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static const char *netcp_node_name(struct device_node *node) |
| 194 | { |
| 195 | const char *name; |
| 196 | |
| 197 | if (of_property_read_string(node, "label", &name) < 0) |
| 198 | name = node->name; |
| 199 | if (!name) |
| 200 | name = "unknown"; |
| 201 | return name; |
| 202 | } |
| 203 | |
| 204 | /* Module management routines */ |
| 205 | static int netcp_register_interface(struct netcp_intf *netcp) |
| 206 | { |
| 207 | int ret; |
| 208 | |
| 209 | ret = register_netdev(netcp->ndev); |
| 210 | if (!ret) |
| 211 | netcp->netdev_registered = true; |
| 212 | return ret; |
| 213 | } |
| 214 | |
| 215 | static int netcp_module_probe(struct netcp_device *netcp_device, |
| 216 | struct netcp_module *module) |
| 217 | { |
| 218 | struct device *dev = netcp_device->device; |
| 219 | struct device_node *devices, *interface, *node = dev->of_node; |
| 220 | struct device_node *child; |
| 221 | struct netcp_inst_modpriv *inst_modpriv; |
| 222 | struct netcp_intf *netcp_intf; |
| 223 | struct netcp_module *tmp; |
| 224 | bool primary_module_registered = false; |
| 225 | int ret; |
| 226 | |
| 227 | /* Find this module in the sub-tree for this device */ |
| 228 | devices = of_get_child_by_name(node, "netcp-devices"); |
| 229 | if (!devices) { |
| 230 | dev_err(dev, "could not find netcp-devices node\n"); |
| 231 | return NETCP_MOD_PROBE_SKIPPED; |
| 232 | } |
| 233 | |
| 234 | for_each_available_child_of_node(devices, child) { |
| 235 | const char *name = netcp_node_name(child); |
| 236 | |
| 237 | if (!strcasecmp(module->name, name)) |
| 238 | break; |
| 239 | } |
| 240 | |
| 241 | of_node_put(devices); |
| 242 | /* If module not used for this device, skip it */ |
| 243 | if (!child) { |
| 244 | dev_warn(dev, "module(%s) not used for device\n", module->name); |
| 245 | return NETCP_MOD_PROBE_SKIPPED; |
| 246 | } |
| 247 | |
| 248 | inst_modpriv = devm_kzalloc(dev, sizeof(*inst_modpriv), GFP_KERNEL); |
| 249 | if (!inst_modpriv) { |
| 250 | of_node_put(child); |
| 251 | return -ENOMEM; |
| 252 | } |
| 253 | |
| 254 | inst_modpriv->netcp_device = netcp_device; |
| 255 | inst_modpriv->netcp_module = module; |
| 256 | list_add_tail(&inst_modpriv->inst_list, &netcp_device->modpriv_head); |
| 257 | |
| 258 | ret = module->probe(netcp_device, dev, child, |
| 259 | &inst_modpriv->module_priv); |
| 260 | of_node_put(child); |
| 261 | if (ret) { |
| 262 | dev_err(dev, "Probe of module(%s) failed with %d\n", |
| 263 | module->name, ret); |
| 264 | list_del(&inst_modpriv->inst_list); |
| 265 | devm_kfree(dev, inst_modpriv); |
| 266 | return NETCP_MOD_PROBE_FAILED; |
| 267 | } |
| 268 | |
| 269 | /* Attach modules only if the primary module is probed */ |
| 270 | for_each_netcp_module(tmp) { |
| 271 | if (tmp->primary) |
| 272 | primary_module_registered = true; |
| 273 | } |
| 274 | |
| 275 | if (!primary_module_registered) |
| 276 | return 0; |
| 277 | |
| 278 | /* Attach module to interfaces */ |
| 279 | list_for_each_entry(netcp_intf, &netcp_device->interface_head, |
| 280 | interface_list) { |
| 281 | struct netcp_intf_modpriv *intf_modpriv; |
| 282 | |
| 283 | /* If interface not registered then register now */ |
| 284 | if (!netcp_intf->netdev_registered) |
| 285 | ret = netcp_register_interface(netcp_intf); |
| 286 | |
| 287 | if (ret) |
| 288 | return -ENODEV; |
| 289 | |
| 290 | intf_modpriv = devm_kzalloc(dev, sizeof(*intf_modpriv), |
| 291 | GFP_KERNEL); |
| 292 | if (!intf_modpriv) |
| 293 | return -ENOMEM; |
| 294 | |
| 295 | interface = of_parse_phandle(netcp_intf->node_interface, |
| 296 | module->name, 0); |
| 297 | |
| 298 | intf_modpriv->netcp_priv = netcp_intf; |
| 299 | intf_modpriv->netcp_module = module; |
| 300 | list_add_tail(&intf_modpriv->intf_list, |
| 301 | &netcp_intf->module_head); |
| 302 | |
| 303 | ret = module->attach(inst_modpriv->module_priv, |
| 304 | netcp_intf->ndev, interface, |
| 305 | &intf_modpriv->module_priv); |
| 306 | of_node_put(interface); |
| 307 | if (ret) { |
| 308 | dev_dbg(dev, "Attach of module %s declined with %d\n", |
| 309 | module->name, ret); |
| 310 | list_del(&intf_modpriv->intf_list); |
| 311 | devm_kfree(dev, intf_modpriv); |
| 312 | continue; |
| 313 | } |
| 314 | } |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | int netcp_register_module(struct netcp_module *module) |
| 319 | { |
| 320 | struct netcp_device *netcp_device; |
| 321 | struct netcp_module *tmp; |
| 322 | int ret; |
| 323 | |
| 324 | if (!module->name) { |
| 325 | WARN(1, "error registering netcp module: no name\n"); |
| 326 | return -EINVAL; |
| 327 | } |
| 328 | |
| 329 | if (!module->probe) { |
| 330 | WARN(1, "error registering netcp module: no probe\n"); |
| 331 | return -EINVAL; |
| 332 | } |
| 333 | |
| 334 | mutex_lock(&netcp_modules_lock); |
| 335 | |
| 336 | for_each_netcp_module(tmp) { |
| 337 | if (!strcasecmp(tmp->name, module->name)) { |
| 338 | mutex_unlock(&netcp_modules_lock); |
| 339 | return -EEXIST; |
| 340 | } |
| 341 | } |
| 342 | list_add_tail(&module->module_list, &netcp_modules); |
| 343 | |
| 344 | list_for_each_entry(netcp_device, &netcp_devices, device_list) { |
| 345 | ret = netcp_module_probe(netcp_device, module); |
| 346 | if (ret < 0) |
| 347 | goto fail; |
| 348 | } |
| 349 | |
| 350 | mutex_unlock(&netcp_modules_lock); |
| 351 | return 0; |
| 352 | |
| 353 | fail: |
| 354 | mutex_unlock(&netcp_modules_lock); |
| 355 | netcp_unregister_module(module); |
| 356 | return ret; |
| 357 | } |
Karicheri, Muralidharan | 58c11b5 | 2015-01-29 18:15:51 -0500 | [diff] [blame] | 358 | EXPORT_SYMBOL_GPL(netcp_register_module); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 359 | |
| 360 | static void netcp_release_module(struct netcp_device *netcp_device, |
| 361 | struct netcp_module *module) |
| 362 | { |
| 363 | struct netcp_inst_modpriv *inst_modpriv, *inst_tmp; |
| 364 | struct netcp_intf *netcp_intf, *netcp_tmp; |
| 365 | struct device *dev = netcp_device->device; |
| 366 | |
| 367 | /* Release the module from each interface */ |
| 368 | list_for_each_entry_safe(netcp_intf, netcp_tmp, |
| 369 | &netcp_device->interface_head, |
| 370 | interface_list) { |
| 371 | struct netcp_intf_modpriv *intf_modpriv, *intf_tmp; |
| 372 | |
| 373 | list_for_each_entry_safe(intf_modpriv, intf_tmp, |
| 374 | &netcp_intf->module_head, |
| 375 | intf_list) { |
| 376 | if (intf_modpriv->netcp_module == module) { |
| 377 | module->release(intf_modpriv->module_priv); |
| 378 | list_del(&intf_modpriv->intf_list); |
| 379 | devm_kfree(dev, intf_modpriv); |
| 380 | break; |
| 381 | } |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /* Remove the module from each instance */ |
| 386 | list_for_each_entry_safe(inst_modpriv, inst_tmp, |
| 387 | &netcp_device->modpriv_head, inst_list) { |
| 388 | if (inst_modpriv->netcp_module == module) { |
| 389 | module->remove(netcp_device, |
| 390 | inst_modpriv->module_priv); |
| 391 | list_del(&inst_modpriv->inst_list); |
| 392 | devm_kfree(dev, inst_modpriv); |
| 393 | break; |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | void netcp_unregister_module(struct netcp_module *module) |
| 399 | { |
| 400 | struct netcp_device *netcp_device; |
| 401 | struct netcp_module *module_tmp; |
| 402 | |
| 403 | mutex_lock(&netcp_modules_lock); |
| 404 | |
| 405 | list_for_each_entry(netcp_device, &netcp_devices, device_list) { |
| 406 | netcp_release_module(netcp_device, module); |
| 407 | } |
| 408 | |
| 409 | /* Remove the module from the module list */ |
| 410 | for_each_netcp_module(module_tmp) { |
| 411 | if (module == module_tmp) { |
| 412 | list_del(&module->module_list); |
| 413 | break; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | mutex_unlock(&netcp_modules_lock); |
| 418 | } |
Karicheri, Muralidharan | 58c11b5 | 2015-01-29 18:15:51 -0500 | [diff] [blame] | 419 | EXPORT_SYMBOL_GPL(netcp_unregister_module); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 420 | |
| 421 | void *netcp_module_get_intf_data(struct netcp_module *module, |
| 422 | struct netcp_intf *intf) |
| 423 | { |
| 424 | struct netcp_intf_modpriv *intf_modpriv; |
| 425 | |
| 426 | list_for_each_entry(intf_modpriv, &intf->module_head, intf_list) |
| 427 | if (intf_modpriv->netcp_module == module) |
| 428 | return intf_modpriv->module_priv; |
| 429 | return NULL; |
| 430 | } |
Karicheri, Muralidharan | 58c11b5 | 2015-01-29 18:15:51 -0500 | [diff] [blame] | 431 | EXPORT_SYMBOL_GPL(netcp_module_get_intf_data); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 432 | |
| 433 | /* Module TX and RX Hook management */ |
| 434 | struct netcp_hook_list { |
| 435 | struct list_head list; |
| 436 | netcp_hook_rtn *hook_rtn; |
| 437 | void *hook_data; |
| 438 | int order; |
| 439 | }; |
| 440 | |
| 441 | int netcp_register_txhook(struct netcp_intf *netcp_priv, int order, |
| 442 | netcp_hook_rtn *hook_rtn, void *hook_data) |
| 443 | { |
| 444 | struct netcp_hook_list *entry; |
| 445 | struct netcp_hook_list *next; |
| 446 | unsigned long flags; |
| 447 | |
| 448 | entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL); |
| 449 | if (!entry) |
| 450 | return -ENOMEM; |
| 451 | |
| 452 | entry->hook_rtn = hook_rtn; |
| 453 | entry->hook_data = hook_data; |
| 454 | entry->order = order; |
| 455 | |
| 456 | spin_lock_irqsave(&netcp_priv->lock, flags); |
| 457 | list_for_each_entry(next, &netcp_priv->txhook_list_head, list) { |
| 458 | if (next->order > order) |
| 459 | break; |
| 460 | } |
| 461 | __list_add(&entry->list, next->list.prev, &next->list); |
| 462 | spin_unlock_irqrestore(&netcp_priv->lock, flags); |
| 463 | |
| 464 | return 0; |
| 465 | } |
Karicheri, Muralidharan | 58c11b5 | 2015-01-29 18:15:51 -0500 | [diff] [blame] | 466 | EXPORT_SYMBOL_GPL(netcp_register_txhook); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 467 | |
| 468 | int netcp_unregister_txhook(struct netcp_intf *netcp_priv, int order, |
| 469 | netcp_hook_rtn *hook_rtn, void *hook_data) |
| 470 | { |
| 471 | struct netcp_hook_list *next, *n; |
| 472 | unsigned long flags; |
| 473 | |
| 474 | spin_lock_irqsave(&netcp_priv->lock, flags); |
| 475 | list_for_each_entry_safe(next, n, &netcp_priv->txhook_list_head, list) { |
| 476 | if ((next->order == order) && |
| 477 | (next->hook_rtn == hook_rtn) && |
| 478 | (next->hook_data == hook_data)) { |
| 479 | list_del(&next->list); |
| 480 | spin_unlock_irqrestore(&netcp_priv->lock, flags); |
| 481 | devm_kfree(netcp_priv->dev, next); |
| 482 | return 0; |
| 483 | } |
| 484 | } |
| 485 | spin_unlock_irqrestore(&netcp_priv->lock, flags); |
| 486 | return -ENOENT; |
| 487 | } |
Karicheri, Muralidharan | 58c11b5 | 2015-01-29 18:15:51 -0500 | [diff] [blame] | 488 | EXPORT_SYMBOL_GPL(netcp_unregister_txhook); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 489 | |
| 490 | int netcp_register_rxhook(struct netcp_intf *netcp_priv, int order, |
| 491 | netcp_hook_rtn *hook_rtn, void *hook_data) |
| 492 | { |
| 493 | struct netcp_hook_list *entry; |
| 494 | struct netcp_hook_list *next; |
| 495 | unsigned long flags; |
| 496 | |
| 497 | entry = devm_kzalloc(netcp_priv->dev, sizeof(*entry), GFP_KERNEL); |
| 498 | if (!entry) |
| 499 | return -ENOMEM; |
| 500 | |
| 501 | entry->hook_rtn = hook_rtn; |
| 502 | entry->hook_data = hook_data; |
| 503 | entry->order = order; |
| 504 | |
| 505 | spin_lock_irqsave(&netcp_priv->lock, flags); |
| 506 | list_for_each_entry(next, &netcp_priv->rxhook_list_head, list) { |
| 507 | if (next->order > order) |
| 508 | break; |
| 509 | } |
| 510 | __list_add(&entry->list, next->list.prev, &next->list); |
| 511 | spin_unlock_irqrestore(&netcp_priv->lock, flags); |
| 512 | |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | int netcp_unregister_rxhook(struct netcp_intf *netcp_priv, int order, |
| 517 | netcp_hook_rtn *hook_rtn, void *hook_data) |
| 518 | { |
| 519 | struct netcp_hook_list *next, *n; |
| 520 | unsigned long flags; |
| 521 | |
| 522 | spin_lock_irqsave(&netcp_priv->lock, flags); |
| 523 | list_for_each_entry_safe(next, n, &netcp_priv->rxhook_list_head, list) { |
| 524 | if ((next->order == order) && |
| 525 | (next->hook_rtn == hook_rtn) && |
| 526 | (next->hook_data == hook_data)) { |
| 527 | list_del(&next->list); |
| 528 | spin_unlock_irqrestore(&netcp_priv->lock, flags); |
| 529 | devm_kfree(netcp_priv->dev, next); |
| 530 | return 0; |
| 531 | } |
| 532 | } |
| 533 | spin_unlock_irqrestore(&netcp_priv->lock, flags); |
| 534 | |
| 535 | return -ENOENT; |
| 536 | } |
| 537 | |
| 538 | static void netcp_frag_free(bool is_frag, void *ptr) |
| 539 | { |
| 540 | if (is_frag) |
Alexander Duyck | 7d525c4 | 2015-05-06 21:12:08 -0700 | [diff] [blame] | 541 | skb_free_frag(ptr); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 542 | else |
| 543 | kfree(ptr); |
| 544 | } |
| 545 | |
| 546 | static void netcp_free_rx_desc_chain(struct netcp_intf *netcp, |
| 547 | struct knav_dma_desc *desc) |
| 548 | { |
| 549 | struct knav_dma_desc *ndesc; |
| 550 | dma_addr_t dma_desc, dma_buf; |
| 551 | unsigned int buf_len, dma_sz = sizeof(*ndesc); |
| 552 | void *buf_ptr; |
| 553 | u32 tmp; |
| 554 | |
| 555 | get_words(&dma_desc, 1, &desc->next_desc); |
| 556 | |
| 557 | while (dma_desc) { |
| 558 | ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); |
| 559 | if (unlikely(!ndesc)) { |
| 560 | dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); |
| 561 | break; |
| 562 | } |
| 563 | get_pkt_info(&dma_buf, &tmp, &dma_desc, ndesc); |
| 564 | get_pad_info((u32 *)&buf_ptr, &tmp, ndesc); |
| 565 | dma_unmap_page(netcp->dev, dma_buf, PAGE_SIZE, DMA_FROM_DEVICE); |
| 566 | __free_page(buf_ptr); |
| 567 | knav_pool_desc_put(netcp->rx_pool, desc); |
| 568 | } |
| 569 | |
| 570 | get_pad_info((u32 *)&buf_ptr, &buf_len, desc); |
| 571 | if (buf_ptr) |
| 572 | netcp_frag_free(buf_len <= PAGE_SIZE, buf_ptr); |
| 573 | knav_pool_desc_put(netcp->rx_pool, desc); |
| 574 | } |
| 575 | |
| 576 | static void netcp_empty_rx_queue(struct netcp_intf *netcp) |
| 577 | { |
| 578 | struct knav_dma_desc *desc; |
| 579 | unsigned int dma_sz; |
| 580 | dma_addr_t dma; |
| 581 | |
| 582 | for (; ;) { |
| 583 | dma = knav_queue_pop(netcp->rx_queue, &dma_sz); |
| 584 | if (!dma) |
| 585 | break; |
| 586 | |
| 587 | desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz); |
| 588 | if (unlikely(!desc)) { |
| 589 | dev_err(netcp->ndev_dev, "%s: failed to unmap Rx desc\n", |
| 590 | __func__); |
| 591 | netcp->ndev->stats.rx_errors++; |
| 592 | continue; |
| 593 | } |
| 594 | netcp_free_rx_desc_chain(netcp, desc); |
| 595 | netcp->ndev->stats.rx_dropped++; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | static int netcp_process_one_rx_packet(struct netcp_intf *netcp) |
| 600 | { |
| 601 | unsigned int dma_sz, buf_len, org_buf_len; |
| 602 | struct knav_dma_desc *desc, *ndesc; |
| 603 | unsigned int pkt_sz = 0, accum_sz; |
| 604 | struct netcp_hook_list *rx_hook; |
| 605 | dma_addr_t dma_desc, dma_buff; |
| 606 | struct netcp_packet p_info; |
| 607 | struct sk_buff *skb; |
| 608 | void *org_buf_ptr; |
| 609 | u32 tmp; |
| 610 | |
| 611 | dma_desc = knav_queue_pop(netcp->rx_queue, &dma_sz); |
| 612 | if (!dma_desc) |
| 613 | return -1; |
| 614 | |
| 615 | desc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); |
| 616 | if (unlikely(!desc)) { |
| 617 | dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | get_pkt_info(&dma_buff, &buf_len, &dma_desc, desc); |
| 622 | get_pad_info((u32 *)&org_buf_ptr, &org_buf_len, desc); |
| 623 | |
| 624 | if (unlikely(!org_buf_ptr)) { |
| 625 | dev_err(netcp->ndev_dev, "NULL bufptr in desc\n"); |
| 626 | goto free_desc; |
| 627 | } |
| 628 | |
| 629 | pkt_sz &= KNAV_DMA_DESC_PKT_LEN_MASK; |
| 630 | accum_sz = buf_len; |
| 631 | dma_unmap_single(netcp->dev, dma_buff, buf_len, DMA_FROM_DEVICE); |
| 632 | |
| 633 | /* Build a new sk_buff for the primary buffer */ |
| 634 | skb = build_skb(org_buf_ptr, org_buf_len); |
| 635 | if (unlikely(!skb)) { |
| 636 | dev_err(netcp->ndev_dev, "build_skb() failed\n"); |
| 637 | goto free_desc; |
| 638 | } |
| 639 | |
| 640 | /* update data, tail and len */ |
| 641 | skb_reserve(skb, NETCP_SOP_OFFSET); |
| 642 | __skb_put(skb, buf_len); |
| 643 | |
| 644 | /* Fill in the page fragment list */ |
| 645 | while (dma_desc) { |
| 646 | struct page *page; |
| 647 | |
| 648 | ndesc = knav_pool_desc_unmap(netcp->rx_pool, dma_desc, dma_sz); |
| 649 | if (unlikely(!ndesc)) { |
| 650 | dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); |
| 651 | goto free_desc; |
| 652 | } |
| 653 | |
| 654 | get_pkt_info(&dma_buff, &buf_len, &dma_desc, ndesc); |
| 655 | get_pad_info((u32 *)&page, &tmp, ndesc); |
| 656 | |
| 657 | if (likely(dma_buff && buf_len && page)) { |
| 658 | dma_unmap_page(netcp->dev, dma_buff, PAGE_SIZE, |
| 659 | DMA_FROM_DEVICE); |
| 660 | } else { |
| 661 | dev_err(netcp->ndev_dev, "Bad Rx desc dma_buff(%p), len(%d), page(%p)\n", |
| 662 | (void *)dma_buff, buf_len, page); |
| 663 | goto free_desc; |
| 664 | } |
| 665 | |
| 666 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, |
| 667 | offset_in_page(dma_buff), buf_len, PAGE_SIZE); |
| 668 | accum_sz += buf_len; |
| 669 | |
| 670 | /* Free the descriptor */ |
| 671 | knav_pool_desc_put(netcp->rx_pool, ndesc); |
| 672 | } |
| 673 | |
| 674 | /* Free the primary descriptor */ |
| 675 | knav_pool_desc_put(netcp->rx_pool, desc); |
| 676 | |
| 677 | /* check for packet len and warn */ |
| 678 | if (unlikely(pkt_sz != accum_sz)) |
| 679 | dev_dbg(netcp->ndev_dev, "mismatch in packet size(%d) & sum of fragments(%d)\n", |
| 680 | pkt_sz, accum_sz); |
| 681 | |
| 682 | /* Remove ethernet FCS from the packet */ |
| 683 | __pskb_trim(skb, skb->len - ETH_FCS_LEN); |
| 684 | |
| 685 | /* Call each of the RX hooks */ |
| 686 | p_info.skb = skb; |
| 687 | p_info.rxtstamp_complete = false; |
| 688 | list_for_each_entry(rx_hook, &netcp->rxhook_list_head, list) { |
| 689 | int ret; |
| 690 | |
| 691 | ret = rx_hook->hook_rtn(rx_hook->order, rx_hook->hook_data, |
| 692 | &p_info); |
| 693 | if (unlikely(ret)) { |
| 694 | dev_err(netcp->ndev_dev, "RX hook %d failed: %d\n", |
| 695 | rx_hook->order, ret); |
| 696 | netcp->ndev->stats.rx_errors++; |
| 697 | dev_kfree_skb(skb); |
| 698 | return 0; |
| 699 | } |
| 700 | } |
| 701 | |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 702 | netcp->ndev->stats.rx_packets++; |
| 703 | netcp->ndev->stats.rx_bytes += skb->len; |
| 704 | |
| 705 | /* push skb up the stack */ |
| 706 | skb->protocol = eth_type_trans(skb, netcp->ndev); |
| 707 | netif_receive_skb(skb); |
| 708 | return 0; |
| 709 | |
| 710 | free_desc: |
| 711 | netcp_free_rx_desc_chain(netcp, desc); |
| 712 | netcp->ndev->stats.rx_errors++; |
| 713 | return 0; |
| 714 | } |
| 715 | |
| 716 | static int netcp_process_rx_packets(struct netcp_intf *netcp, |
| 717 | unsigned int budget) |
| 718 | { |
| 719 | int i; |
| 720 | |
| 721 | for (i = 0; (i < budget) && !netcp_process_one_rx_packet(netcp); i++) |
| 722 | ; |
| 723 | return i; |
| 724 | } |
| 725 | |
| 726 | /* Release descriptors and attached buffers from Rx FDQ */ |
| 727 | static void netcp_free_rx_buf(struct netcp_intf *netcp, int fdq) |
| 728 | { |
| 729 | struct knav_dma_desc *desc; |
| 730 | unsigned int buf_len, dma_sz; |
| 731 | dma_addr_t dma; |
| 732 | void *buf_ptr; |
| 733 | u32 tmp; |
| 734 | |
| 735 | /* Allocate descriptor */ |
| 736 | while ((dma = knav_queue_pop(netcp->rx_fdq[fdq], &dma_sz))) { |
| 737 | desc = knav_pool_desc_unmap(netcp->rx_pool, dma, dma_sz); |
| 738 | if (unlikely(!desc)) { |
| 739 | dev_err(netcp->ndev_dev, "failed to unmap Rx desc\n"); |
| 740 | continue; |
| 741 | } |
| 742 | |
| 743 | get_org_pkt_info(&dma, &buf_len, desc); |
| 744 | get_pad_info((u32 *)&buf_ptr, &tmp, desc); |
| 745 | |
| 746 | if (unlikely(!dma)) { |
| 747 | dev_err(netcp->ndev_dev, "NULL orig_buff in desc\n"); |
| 748 | knav_pool_desc_put(netcp->rx_pool, desc); |
| 749 | continue; |
| 750 | } |
| 751 | |
| 752 | if (unlikely(!buf_ptr)) { |
| 753 | dev_err(netcp->ndev_dev, "NULL bufptr in desc\n"); |
| 754 | knav_pool_desc_put(netcp->rx_pool, desc); |
| 755 | continue; |
| 756 | } |
| 757 | |
| 758 | if (fdq == 0) { |
| 759 | dma_unmap_single(netcp->dev, dma, buf_len, |
| 760 | DMA_FROM_DEVICE); |
| 761 | netcp_frag_free((buf_len <= PAGE_SIZE), buf_ptr); |
| 762 | } else { |
| 763 | dma_unmap_page(netcp->dev, dma, buf_len, |
| 764 | DMA_FROM_DEVICE); |
| 765 | __free_page(buf_ptr); |
| 766 | } |
| 767 | |
| 768 | knav_pool_desc_put(netcp->rx_pool, desc); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | static void netcp_rxpool_free(struct netcp_intf *netcp) |
| 773 | { |
| 774 | int i; |
| 775 | |
| 776 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && |
| 777 | !IS_ERR_OR_NULL(netcp->rx_fdq[i]); i++) |
| 778 | netcp_free_rx_buf(netcp, i); |
| 779 | |
| 780 | if (knav_pool_count(netcp->rx_pool) != netcp->rx_pool_size) |
| 781 | dev_err(netcp->ndev_dev, "Lost Rx (%d) descriptors\n", |
| 782 | netcp->rx_pool_size - knav_pool_count(netcp->rx_pool)); |
| 783 | |
| 784 | knav_pool_destroy(netcp->rx_pool); |
| 785 | netcp->rx_pool = NULL; |
| 786 | } |
| 787 | |
| 788 | static void netcp_allocate_rx_buf(struct netcp_intf *netcp, int fdq) |
| 789 | { |
| 790 | struct knav_dma_desc *hwdesc; |
| 791 | unsigned int buf_len, dma_sz; |
| 792 | u32 desc_info, pkt_info; |
| 793 | struct page *page; |
| 794 | dma_addr_t dma; |
| 795 | void *bufptr; |
| 796 | u32 pad[2]; |
| 797 | |
| 798 | /* Allocate descriptor */ |
| 799 | hwdesc = knav_pool_desc_get(netcp->rx_pool); |
| 800 | if (IS_ERR_OR_NULL(hwdesc)) { |
| 801 | dev_dbg(netcp->ndev_dev, "out of rx pool desc\n"); |
| 802 | return; |
| 803 | } |
| 804 | |
| 805 | if (likely(fdq == 0)) { |
| 806 | unsigned int primary_buf_len; |
| 807 | /* Allocate a primary receive queue entry */ |
WingMan Kwok | 866b8b1 | 2015-08-04 16:56:53 -0400 | [diff] [blame] | 808 | buf_len = NETCP_PACKET_SIZE + NETCP_SOP_OFFSET; |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 809 | primary_buf_len = SKB_DATA_ALIGN(buf_len) + |
| 810 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); |
| 811 | |
WingMan Kwok | 866b8b1 | 2015-08-04 16:56:53 -0400 | [diff] [blame] | 812 | bufptr = netdev_alloc_frag(primary_buf_len); |
| 813 | pad[1] = primary_buf_len; |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 814 | |
| 815 | if (unlikely(!bufptr)) { |
WingMan Kwok | 866b8b1 | 2015-08-04 16:56:53 -0400 | [diff] [blame] | 816 | dev_warn_ratelimited(netcp->ndev_dev, |
| 817 | "Primary RX buffer alloc failed\n"); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 818 | goto fail; |
| 819 | } |
| 820 | dma = dma_map_single(netcp->dev, bufptr, buf_len, |
| 821 | DMA_TO_DEVICE); |
WingMan Kwok | 866b8b1 | 2015-08-04 16:56:53 -0400 | [diff] [blame] | 822 | if (unlikely(dma_mapping_error(netcp->dev, dma))) |
| 823 | goto fail; |
| 824 | |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 825 | pad[0] = (u32)bufptr; |
| 826 | |
| 827 | } else { |
| 828 | /* Allocate a secondary receive queue entry */ |
WingMan Kwok | 866b8b1 | 2015-08-04 16:56:53 -0400 | [diff] [blame] | 829 | page = alloc_page(GFP_ATOMIC | GFP_DMA | __GFP_COLD); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 830 | if (unlikely(!page)) { |
| 831 | dev_warn_ratelimited(netcp->ndev_dev, "Secondary page alloc failed\n"); |
| 832 | goto fail; |
| 833 | } |
| 834 | buf_len = PAGE_SIZE; |
| 835 | dma = dma_map_page(netcp->dev, page, 0, buf_len, DMA_TO_DEVICE); |
| 836 | pad[0] = (u32)page; |
| 837 | pad[1] = 0; |
| 838 | } |
| 839 | |
| 840 | desc_info = KNAV_DMA_DESC_PS_INFO_IN_DESC; |
| 841 | desc_info |= buf_len & KNAV_DMA_DESC_PKT_LEN_MASK; |
| 842 | pkt_info = KNAV_DMA_DESC_HAS_EPIB; |
| 843 | pkt_info |= KNAV_DMA_NUM_PS_WORDS << KNAV_DMA_DESC_PSLEN_SHIFT; |
| 844 | pkt_info |= (netcp->rx_queue_id & KNAV_DMA_DESC_RETQ_MASK) << |
| 845 | KNAV_DMA_DESC_RETQ_SHIFT; |
| 846 | set_org_pkt_info(dma, buf_len, hwdesc); |
| 847 | set_pad_info(pad[0], pad[1], hwdesc); |
| 848 | set_desc_info(desc_info, pkt_info, hwdesc); |
| 849 | |
| 850 | /* Push to FDQs */ |
| 851 | knav_pool_desc_map(netcp->rx_pool, hwdesc, sizeof(*hwdesc), &dma, |
| 852 | &dma_sz); |
| 853 | knav_queue_push(netcp->rx_fdq[fdq], dma, sizeof(*hwdesc), 0); |
| 854 | return; |
| 855 | |
| 856 | fail: |
| 857 | knav_pool_desc_put(netcp->rx_pool, hwdesc); |
| 858 | } |
| 859 | |
| 860 | /* Refill Rx FDQ with descriptors & attached buffers */ |
| 861 | static void netcp_rxpool_refill(struct netcp_intf *netcp) |
| 862 | { |
| 863 | u32 fdq_deficit[KNAV_DMA_FDQ_PER_CHAN] = {0}; |
| 864 | int i; |
| 865 | |
| 866 | /* Calculate the FDQ deficit and refill */ |
| 867 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_fdq[i]; i++) { |
| 868 | fdq_deficit[i] = netcp->rx_queue_depths[i] - |
| 869 | knav_queue_get_count(netcp->rx_fdq[i]); |
| 870 | |
| 871 | while (fdq_deficit[i]--) |
| 872 | netcp_allocate_rx_buf(netcp, i); |
| 873 | } /* end for fdqs */ |
| 874 | } |
| 875 | |
| 876 | /* NAPI poll */ |
| 877 | static int netcp_rx_poll(struct napi_struct *napi, int budget) |
| 878 | { |
| 879 | struct netcp_intf *netcp = container_of(napi, struct netcp_intf, |
| 880 | rx_napi); |
| 881 | unsigned int packets; |
| 882 | |
| 883 | packets = netcp_process_rx_packets(netcp, budget); |
| 884 | |
| 885 | if (packets < budget) { |
| 886 | napi_complete(&netcp->rx_napi); |
| 887 | knav_queue_enable_notify(netcp->rx_queue); |
| 888 | } |
| 889 | |
| 890 | netcp_rxpool_refill(netcp); |
| 891 | return packets; |
| 892 | } |
| 893 | |
| 894 | static void netcp_rx_notify(void *arg) |
| 895 | { |
| 896 | struct netcp_intf *netcp = arg; |
| 897 | |
| 898 | knav_queue_disable_notify(netcp->rx_queue); |
| 899 | napi_schedule(&netcp->rx_napi); |
| 900 | } |
| 901 | |
| 902 | static void netcp_free_tx_desc_chain(struct netcp_intf *netcp, |
| 903 | struct knav_dma_desc *desc, |
| 904 | unsigned int desc_sz) |
| 905 | { |
| 906 | struct knav_dma_desc *ndesc = desc; |
| 907 | dma_addr_t dma_desc, dma_buf; |
| 908 | unsigned int buf_len; |
| 909 | |
| 910 | while (ndesc) { |
| 911 | get_pkt_info(&dma_buf, &buf_len, &dma_desc, ndesc); |
| 912 | |
| 913 | if (dma_buf && buf_len) |
| 914 | dma_unmap_single(netcp->dev, dma_buf, buf_len, |
| 915 | DMA_TO_DEVICE); |
| 916 | else |
| 917 | dev_warn(netcp->ndev_dev, "bad Tx desc buf(%p), len(%d)\n", |
| 918 | (void *)dma_buf, buf_len); |
| 919 | |
| 920 | knav_pool_desc_put(netcp->tx_pool, ndesc); |
| 921 | ndesc = NULL; |
| 922 | if (dma_desc) { |
| 923 | ndesc = knav_pool_desc_unmap(netcp->tx_pool, dma_desc, |
| 924 | desc_sz); |
| 925 | if (!ndesc) |
| 926 | dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n"); |
| 927 | } |
| 928 | } |
| 929 | } |
| 930 | |
| 931 | static int netcp_process_tx_compl_packets(struct netcp_intf *netcp, |
| 932 | unsigned int budget) |
| 933 | { |
| 934 | struct knav_dma_desc *desc; |
| 935 | struct sk_buff *skb; |
| 936 | unsigned int dma_sz; |
| 937 | dma_addr_t dma; |
| 938 | int pkts = 0; |
| 939 | u32 tmp; |
| 940 | |
| 941 | while (budget--) { |
| 942 | dma = knav_queue_pop(netcp->tx_compl_q, &dma_sz); |
| 943 | if (!dma) |
| 944 | break; |
| 945 | desc = knav_pool_desc_unmap(netcp->tx_pool, dma, dma_sz); |
| 946 | if (unlikely(!desc)) { |
| 947 | dev_err(netcp->ndev_dev, "failed to unmap Tx desc\n"); |
| 948 | netcp->ndev->stats.tx_errors++; |
| 949 | continue; |
| 950 | } |
| 951 | |
| 952 | get_pad_info((u32 *)&skb, &tmp, desc); |
| 953 | netcp_free_tx_desc_chain(netcp, desc, dma_sz); |
| 954 | if (!skb) { |
| 955 | dev_err(netcp->ndev_dev, "No skb in Tx desc\n"); |
| 956 | netcp->ndev->stats.tx_errors++; |
| 957 | continue; |
| 958 | } |
| 959 | |
| 960 | if (netif_subqueue_stopped(netcp->ndev, skb) && |
| 961 | netif_running(netcp->ndev) && |
| 962 | (knav_pool_count(netcp->tx_pool) > |
| 963 | netcp->tx_resume_threshold)) { |
| 964 | u16 subqueue = skb_get_queue_mapping(skb); |
| 965 | |
| 966 | netif_wake_subqueue(netcp->ndev, subqueue); |
| 967 | } |
| 968 | |
| 969 | netcp->ndev->stats.tx_packets++; |
| 970 | netcp->ndev->stats.tx_bytes += skb->len; |
| 971 | dev_kfree_skb(skb); |
| 972 | pkts++; |
| 973 | } |
| 974 | return pkts; |
| 975 | } |
| 976 | |
| 977 | static int netcp_tx_poll(struct napi_struct *napi, int budget) |
| 978 | { |
| 979 | int packets; |
| 980 | struct netcp_intf *netcp = container_of(napi, struct netcp_intf, |
| 981 | tx_napi); |
| 982 | |
| 983 | packets = netcp_process_tx_compl_packets(netcp, budget); |
| 984 | if (packets < budget) { |
| 985 | napi_complete(&netcp->tx_napi); |
| 986 | knav_queue_enable_notify(netcp->tx_compl_q); |
| 987 | } |
| 988 | |
| 989 | return packets; |
| 990 | } |
| 991 | |
| 992 | static void netcp_tx_notify(void *arg) |
| 993 | { |
| 994 | struct netcp_intf *netcp = arg; |
| 995 | |
| 996 | knav_queue_disable_notify(netcp->tx_compl_q); |
| 997 | napi_schedule(&netcp->tx_napi); |
| 998 | } |
| 999 | |
| 1000 | static struct knav_dma_desc* |
| 1001 | netcp_tx_map_skb(struct sk_buff *skb, struct netcp_intf *netcp) |
| 1002 | { |
| 1003 | struct knav_dma_desc *desc, *ndesc, *pdesc; |
| 1004 | unsigned int pkt_len = skb_headlen(skb); |
| 1005 | struct device *dev = netcp->dev; |
| 1006 | dma_addr_t dma_addr; |
| 1007 | unsigned int dma_sz; |
| 1008 | int i; |
| 1009 | |
| 1010 | /* Map the linear buffer */ |
| 1011 | dma_addr = dma_map_single(dev, skb->data, pkt_len, DMA_TO_DEVICE); |
WingMan Kwok | 866b8b1 | 2015-08-04 16:56:53 -0400 | [diff] [blame] | 1012 | if (unlikely(dma_mapping_error(dev, dma_addr))) { |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1013 | dev_err(netcp->ndev_dev, "Failed to map skb buffer\n"); |
| 1014 | return NULL; |
| 1015 | } |
| 1016 | |
| 1017 | desc = knav_pool_desc_get(netcp->tx_pool); |
| 1018 | if (unlikely(IS_ERR_OR_NULL(desc))) { |
| 1019 | dev_err(netcp->ndev_dev, "out of TX desc\n"); |
| 1020 | dma_unmap_single(dev, dma_addr, pkt_len, DMA_TO_DEVICE); |
| 1021 | return NULL; |
| 1022 | } |
| 1023 | |
| 1024 | set_pkt_info(dma_addr, pkt_len, 0, desc); |
| 1025 | if (skb_is_nonlinear(skb)) { |
| 1026 | prefetchw(skb_shinfo(skb)); |
| 1027 | } else { |
| 1028 | desc->next_desc = 0; |
| 1029 | goto upd_pkt_len; |
| 1030 | } |
| 1031 | |
| 1032 | pdesc = desc; |
| 1033 | |
| 1034 | /* Handle the case where skb is fragmented in pages */ |
| 1035 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| 1036 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 1037 | struct page *page = skb_frag_page(frag); |
| 1038 | u32 page_offset = frag->page_offset; |
| 1039 | u32 buf_len = skb_frag_size(frag); |
| 1040 | dma_addr_t desc_dma; |
| 1041 | u32 pkt_info; |
| 1042 | |
| 1043 | dma_addr = dma_map_page(dev, page, page_offset, buf_len, |
| 1044 | DMA_TO_DEVICE); |
| 1045 | if (unlikely(!dma_addr)) { |
| 1046 | dev_err(netcp->ndev_dev, "Failed to map skb page\n"); |
| 1047 | goto free_descs; |
| 1048 | } |
| 1049 | |
| 1050 | ndesc = knav_pool_desc_get(netcp->tx_pool); |
| 1051 | if (unlikely(IS_ERR_OR_NULL(ndesc))) { |
| 1052 | dev_err(netcp->ndev_dev, "out of TX desc for frags\n"); |
| 1053 | dma_unmap_page(dev, dma_addr, buf_len, DMA_TO_DEVICE); |
| 1054 | goto free_descs; |
| 1055 | } |
| 1056 | |
| 1057 | desc_dma = knav_pool_desc_virt_to_dma(netcp->tx_pool, |
| 1058 | (void *)ndesc); |
| 1059 | pkt_info = |
| 1060 | (netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) << |
| 1061 | KNAV_DMA_DESC_RETQ_SHIFT; |
| 1062 | set_pkt_info(dma_addr, buf_len, 0, ndesc); |
| 1063 | set_words(&desc_dma, 1, &pdesc->next_desc); |
| 1064 | pkt_len += buf_len; |
| 1065 | if (pdesc != desc) |
| 1066 | knav_pool_desc_map(netcp->tx_pool, pdesc, |
| 1067 | sizeof(*pdesc), &desc_dma, &dma_sz); |
| 1068 | pdesc = ndesc; |
| 1069 | } |
| 1070 | if (pdesc != desc) |
| 1071 | knav_pool_desc_map(netcp->tx_pool, pdesc, sizeof(*pdesc), |
| 1072 | &dma_addr, &dma_sz); |
| 1073 | |
| 1074 | /* frag list based linkage is not supported for now. */ |
| 1075 | if (skb_shinfo(skb)->frag_list) { |
| 1076 | dev_err_ratelimited(netcp->ndev_dev, "NETIF_F_FRAGLIST not supported\n"); |
| 1077 | goto free_descs; |
| 1078 | } |
| 1079 | |
| 1080 | upd_pkt_len: |
| 1081 | WARN_ON(pkt_len != skb->len); |
| 1082 | |
| 1083 | pkt_len &= KNAV_DMA_DESC_PKT_LEN_MASK; |
| 1084 | set_words(&pkt_len, 1, &desc->desc_info); |
| 1085 | return desc; |
| 1086 | |
| 1087 | free_descs: |
| 1088 | netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc)); |
| 1089 | return NULL; |
| 1090 | } |
| 1091 | |
| 1092 | static int netcp_tx_submit_skb(struct netcp_intf *netcp, |
| 1093 | struct sk_buff *skb, |
| 1094 | struct knav_dma_desc *desc) |
| 1095 | { |
| 1096 | struct netcp_tx_pipe *tx_pipe = NULL; |
| 1097 | struct netcp_hook_list *tx_hook; |
| 1098 | struct netcp_packet p_info; |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1099 | unsigned int dma_sz; |
| 1100 | dma_addr_t dma; |
Karicheri, Muralidharan | e170f40 | 2015-03-20 16:11:21 -0400 | [diff] [blame] | 1101 | u32 tmp = 0; |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1102 | int ret = 0; |
| 1103 | |
| 1104 | p_info.netcp = netcp; |
| 1105 | p_info.skb = skb; |
| 1106 | p_info.tx_pipe = NULL; |
| 1107 | p_info.psdata_len = 0; |
| 1108 | p_info.ts_context = NULL; |
| 1109 | p_info.txtstamp_complete = NULL; |
| 1110 | p_info.epib = desc->epib; |
| 1111 | p_info.psdata = desc->psdata; |
| 1112 | memset(p_info.epib, 0, KNAV_DMA_NUM_EPIB_WORDS * sizeof(u32)); |
| 1113 | |
| 1114 | /* Find out where to inject the packet for transmission */ |
| 1115 | list_for_each_entry(tx_hook, &netcp->txhook_list_head, list) { |
| 1116 | ret = tx_hook->hook_rtn(tx_hook->order, tx_hook->hook_data, |
| 1117 | &p_info); |
| 1118 | if (unlikely(ret != 0)) { |
| 1119 | dev_err(netcp->ndev_dev, "TX hook %d rejected the packet with reason(%d)\n", |
| 1120 | tx_hook->order, ret); |
| 1121 | ret = (ret < 0) ? ret : NETDEV_TX_OK; |
| 1122 | goto out; |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | /* Make sure some TX hook claimed the packet */ |
| 1127 | tx_pipe = p_info.tx_pipe; |
| 1128 | if (!tx_pipe) { |
| 1129 | dev_err(netcp->ndev_dev, "No TX hook claimed the packet!\n"); |
| 1130 | ret = -ENXIO; |
| 1131 | goto out; |
| 1132 | } |
| 1133 | |
| 1134 | /* update descriptor */ |
| 1135 | if (p_info.psdata_len) { |
| 1136 | u32 *psdata = p_info.psdata; |
| 1137 | |
| 1138 | memmove(p_info.psdata, p_info.psdata + p_info.psdata_len, |
| 1139 | p_info.psdata_len); |
| 1140 | set_words(psdata, p_info.psdata_len, psdata); |
Karicheri, Muralidharan | e170f40 | 2015-03-20 16:11:21 -0400 | [diff] [blame] | 1141 | tmp |= (p_info.psdata_len & KNAV_DMA_DESC_PSLEN_MASK) << |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1142 | KNAV_DMA_DESC_PSLEN_SHIFT; |
| 1143 | } |
| 1144 | |
Karicheri, Muralidharan | e170f40 | 2015-03-20 16:11:21 -0400 | [diff] [blame] | 1145 | tmp |= KNAV_DMA_DESC_HAS_EPIB | |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1146 | ((netcp->tx_compl_qid & KNAV_DMA_DESC_RETQ_MASK) << |
Karicheri, Muralidharan | e170f40 | 2015-03-20 16:11:21 -0400 | [diff] [blame] | 1147 | KNAV_DMA_DESC_RETQ_SHIFT); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1148 | |
Karicheri, Muralidharan | e170f40 | 2015-03-20 16:11:21 -0400 | [diff] [blame] | 1149 | if (!(tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO)) { |
| 1150 | tmp |= ((tx_pipe->switch_to_port & KNAV_DMA_DESC_PSFLAG_MASK) << |
| 1151 | KNAV_DMA_DESC_PSFLAG_SHIFT); |
| 1152 | } |
| 1153 | |
| 1154 | set_words(&tmp, 1, &desc->packet_info); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1155 | set_words((u32 *)&skb, 1, &desc->pad[0]); |
| 1156 | |
Karicheri, Muralidharan | e170f40 | 2015-03-20 16:11:21 -0400 | [diff] [blame] | 1157 | if (tx_pipe->flags & SWITCH_TO_PORT_IN_TAGINFO) { |
| 1158 | tmp = tx_pipe->switch_to_port; |
| 1159 | set_words((u32 *)&tmp, 1, &desc->tag_info); |
| 1160 | } |
| 1161 | |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1162 | /* submit packet descriptor */ |
| 1163 | ret = knav_pool_desc_map(netcp->tx_pool, desc, sizeof(*desc), &dma, |
| 1164 | &dma_sz); |
| 1165 | if (unlikely(ret)) { |
| 1166 | dev_err(netcp->ndev_dev, "%s() failed to map desc\n", __func__); |
| 1167 | ret = -ENOMEM; |
| 1168 | goto out; |
| 1169 | } |
| 1170 | skb_tx_timestamp(skb); |
| 1171 | knav_queue_push(tx_pipe->dma_queue, dma, dma_sz, 0); |
| 1172 | |
| 1173 | out: |
| 1174 | return ret; |
| 1175 | } |
| 1176 | |
| 1177 | /* Submit the packet */ |
| 1178 | static int netcp_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 1179 | { |
| 1180 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1181 | int subqueue = skb_get_queue_mapping(skb); |
| 1182 | struct knav_dma_desc *desc; |
| 1183 | int desc_count, ret = 0; |
| 1184 | |
| 1185 | if (unlikely(skb->len <= 0)) { |
| 1186 | dev_kfree_skb(skb); |
| 1187 | return NETDEV_TX_OK; |
| 1188 | } |
| 1189 | |
| 1190 | if (unlikely(skb->len < NETCP_MIN_PACKET_SIZE)) { |
| 1191 | ret = skb_padto(skb, NETCP_MIN_PACKET_SIZE); |
| 1192 | if (ret < 0) { |
| 1193 | /* If we get here, the skb has already been dropped */ |
| 1194 | dev_warn(netcp->ndev_dev, "padding failed (%d), packet dropped\n", |
| 1195 | ret); |
| 1196 | ndev->stats.tx_dropped++; |
| 1197 | return ret; |
| 1198 | } |
| 1199 | skb->len = NETCP_MIN_PACKET_SIZE; |
| 1200 | } |
| 1201 | |
| 1202 | desc = netcp_tx_map_skb(skb, netcp); |
| 1203 | if (unlikely(!desc)) { |
| 1204 | netif_stop_subqueue(ndev, subqueue); |
| 1205 | ret = -ENOBUFS; |
| 1206 | goto drop; |
| 1207 | } |
| 1208 | |
| 1209 | ret = netcp_tx_submit_skb(netcp, skb, desc); |
| 1210 | if (ret) |
| 1211 | goto drop; |
| 1212 | |
| 1213 | ndev->trans_start = jiffies; |
| 1214 | |
| 1215 | /* Check Tx pool count & stop subqueue if needed */ |
| 1216 | desc_count = knav_pool_count(netcp->tx_pool); |
| 1217 | if (desc_count < netcp->tx_pause_threshold) { |
| 1218 | dev_dbg(netcp->ndev_dev, "pausing tx, count(%d)\n", desc_count); |
| 1219 | netif_stop_subqueue(ndev, subqueue); |
| 1220 | } |
| 1221 | return NETDEV_TX_OK; |
| 1222 | |
| 1223 | drop: |
| 1224 | ndev->stats.tx_dropped++; |
| 1225 | if (desc) |
| 1226 | netcp_free_tx_desc_chain(netcp, desc, sizeof(*desc)); |
| 1227 | dev_kfree_skb(skb); |
| 1228 | return ret; |
| 1229 | } |
| 1230 | |
| 1231 | int netcp_txpipe_close(struct netcp_tx_pipe *tx_pipe) |
| 1232 | { |
| 1233 | if (tx_pipe->dma_channel) { |
| 1234 | knav_dma_close_channel(tx_pipe->dma_channel); |
| 1235 | tx_pipe->dma_channel = NULL; |
| 1236 | } |
| 1237 | return 0; |
| 1238 | } |
Karicheri, Muralidharan | 58c11b5 | 2015-01-29 18:15:51 -0500 | [diff] [blame] | 1239 | EXPORT_SYMBOL_GPL(netcp_txpipe_close); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1240 | |
| 1241 | int netcp_txpipe_open(struct netcp_tx_pipe *tx_pipe) |
| 1242 | { |
| 1243 | struct device *dev = tx_pipe->netcp_device->device; |
| 1244 | struct knav_dma_cfg config; |
| 1245 | int ret = 0; |
| 1246 | u8 name[16]; |
| 1247 | |
| 1248 | memset(&config, 0, sizeof(config)); |
| 1249 | config.direction = DMA_MEM_TO_DEV; |
| 1250 | config.u.tx.filt_einfo = false; |
| 1251 | config.u.tx.filt_pswords = false; |
| 1252 | config.u.tx.priority = DMA_PRIO_MED_L; |
| 1253 | |
| 1254 | tx_pipe->dma_channel = knav_dma_open_channel(dev, |
| 1255 | tx_pipe->dma_chan_name, &config); |
| 1256 | if (IS_ERR_OR_NULL(tx_pipe->dma_channel)) { |
| 1257 | dev_err(dev, "failed opening tx chan(%s)\n", |
| 1258 | tx_pipe->dma_chan_name); |
| 1259 | goto err; |
| 1260 | } |
| 1261 | |
| 1262 | snprintf(name, sizeof(name), "tx-pipe-%s", dev_name(dev)); |
| 1263 | tx_pipe->dma_queue = knav_queue_open(name, tx_pipe->dma_queue_id, |
| 1264 | KNAV_QUEUE_SHARED); |
| 1265 | if (IS_ERR(tx_pipe->dma_queue)) { |
| 1266 | dev_err(dev, "Could not open DMA queue for channel \"%s\": %d\n", |
| 1267 | name, ret); |
| 1268 | ret = PTR_ERR(tx_pipe->dma_queue); |
| 1269 | goto err; |
| 1270 | } |
| 1271 | |
| 1272 | dev_dbg(dev, "opened tx pipe %s\n", name); |
| 1273 | return 0; |
| 1274 | |
| 1275 | err: |
| 1276 | if (!IS_ERR_OR_NULL(tx_pipe->dma_channel)) |
| 1277 | knav_dma_close_channel(tx_pipe->dma_channel); |
| 1278 | tx_pipe->dma_channel = NULL; |
| 1279 | return ret; |
| 1280 | } |
Karicheri, Muralidharan | 58c11b5 | 2015-01-29 18:15:51 -0500 | [diff] [blame] | 1281 | EXPORT_SYMBOL_GPL(netcp_txpipe_open); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1282 | |
| 1283 | int netcp_txpipe_init(struct netcp_tx_pipe *tx_pipe, |
| 1284 | struct netcp_device *netcp_device, |
| 1285 | const char *dma_chan_name, unsigned int dma_queue_id) |
| 1286 | { |
| 1287 | memset(tx_pipe, 0, sizeof(*tx_pipe)); |
| 1288 | tx_pipe->netcp_device = netcp_device; |
| 1289 | tx_pipe->dma_chan_name = dma_chan_name; |
| 1290 | tx_pipe->dma_queue_id = dma_queue_id; |
| 1291 | return 0; |
| 1292 | } |
Karicheri, Muralidharan | 58c11b5 | 2015-01-29 18:15:51 -0500 | [diff] [blame] | 1293 | EXPORT_SYMBOL_GPL(netcp_txpipe_init); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1294 | |
| 1295 | static struct netcp_addr *netcp_addr_find(struct netcp_intf *netcp, |
| 1296 | const u8 *addr, |
| 1297 | enum netcp_addr_type type) |
| 1298 | { |
| 1299 | struct netcp_addr *naddr; |
| 1300 | |
| 1301 | list_for_each_entry(naddr, &netcp->addr_list, node) { |
| 1302 | if (naddr->type != type) |
| 1303 | continue; |
| 1304 | if (addr && memcmp(addr, naddr->addr, ETH_ALEN)) |
| 1305 | continue; |
| 1306 | return naddr; |
| 1307 | } |
| 1308 | |
| 1309 | return NULL; |
| 1310 | } |
| 1311 | |
| 1312 | static struct netcp_addr *netcp_addr_add(struct netcp_intf *netcp, |
| 1313 | const u8 *addr, |
| 1314 | enum netcp_addr_type type) |
| 1315 | { |
| 1316 | struct netcp_addr *naddr; |
| 1317 | |
| 1318 | naddr = devm_kmalloc(netcp->dev, sizeof(*naddr), GFP_ATOMIC); |
| 1319 | if (!naddr) |
| 1320 | return NULL; |
| 1321 | |
| 1322 | naddr->type = type; |
| 1323 | naddr->flags = 0; |
| 1324 | naddr->netcp = netcp; |
| 1325 | if (addr) |
| 1326 | ether_addr_copy(naddr->addr, addr); |
| 1327 | else |
Joe Perches | c7bf716 | 2015-03-02 19:54:47 -0800 | [diff] [blame] | 1328 | eth_zero_addr(naddr->addr); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1329 | list_add_tail(&naddr->node, &netcp->addr_list); |
| 1330 | |
| 1331 | return naddr; |
| 1332 | } |
| 1333 | |
| 1334 | static void netcp_addr_del(struct netcp_intf *netcp, struct netcp_addr *naddr) |
| 1335 | { |
| 1336 | list_del(&naddr->node); |
| 1337 | devm_kfree(netcp->dev, naddr); |
| 1338 | } |
| 1339 | |
| 1340 | static void netcp_addr_clear_mark(struct netcp_intf *netcp) |
| 1341 | { |
| 1342 | struct netcp_addr *naddr; |
| 1343 | |
| 1344 | list_for_each_entry(naddr, &netcp->addr_list, node) |
| 1345 | naddr->flags = 0; |
| 1346 | } |
| 1347 | |
| 1348 | static void netcp_addr_add_mark(struct netcp_intf *netcp, const u8 *addr, |
| 1349 | enum netcp_addr_type type) |
| 1350 | { |
| 1351 | struct netcp_addr *naddr; |
| 1352 | |
| 1353 | naddr = netcp_addr_find(netcp, addr, type); |
| 1354 | if (naddr) { |
| 1355 | naddr->flags |= ADDR_VALID; |
| 1356 | return; |
| 1357 | } |
| 1358 | |
| 1359 | naddr = netcp_addr_add(netcp, addr, type); |
| 1360 | if (!WARN_ON(!naddr)) |
| 1361 | naddr->flags |= ADDR_NEW; |
| 1362 | } |
| 1363 | |
| 1364 | static void netcp_addr_sweep_del(struct netcp_intf *netcp) |
| 1365 | { |
| 1366 | struct netcp_addr *naddr, *tmp; |
| 1367 | struct netcp_intf_modpriv *priv; |
| 1368 | struct netcp_module *module; |
| 1369 | int error; |
| 1370 | |
| 1371 | list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) { |
| 1372 | if (naddr->flags & (ADDR_VALID | ADDR_NEW)) |
| 1373 | continue; |
| 1374 | dev_dbg(netcp->ndev_dev, "deleting address %pM, type %x\n", |
| 1375 | naddr->addr, naddr->type); |
| 1376 | mutex_lock(&netcp_modules_lock); |
| 1377 | for_each_module(netcp, priv) { |
| 1378 | module = priv->netcp_module; |
| 1379 | if (!module->del_addr) |
| 1380 | continue; |
| 1381 | error = module->del_addr(priv->module_priv, |
| 1382 | naddr); |
| 1383 | WARN_ON(error); |
| 1384 | } |
| 1385 | mutex_unlock(&netcp_modules_lock); |
| 1386 | netcp_addr_del(netcp, naddr); |
| 1387 | } |
| 1388 | } |
| 1389 | |
| 1390 | static void netcp_addr_sweep_add(struct netcp_intf *netcp) |
| 1391 | { |
| 1392 | struct netcp_addr *naddr, *tmp; |
| 1393 | struct netcp_intf_modpriv *priv; |
| 1394 | struct netcp_module *module; |
| 1395 | int error; |
| 1396 | |
| 1397 | list_for_each_entry_safe(naddr, tmp, &netcp->addr_list, node) { |
| 1398 | if (!(naddr->flags & ADDR_NEW)) |
| 1399 | continue; |
| 1400 | dev_dbg(netcp->ndev_dev, "adding address %pM, type %x\n", |
| 1401 | naddr->addr, naddr->type); |
| 1402 | mutex_lock(&netcp_modules_lock); |
| 1403 | for_each_module(netcp, priv) { |
| 1404 | module = priv->netcp_module; |
| 1405 | if (!module->add_addr) |
| 1406 | continue; |
| 1407 | error = module->add_addr(priv->module_priv, naddr); |
| 1408 | WARN_ON(error); |
| 1409 | } |
| 1410 | mutex_unlock(&netcp_modules_lock); |
| 1411 | } |
| 1412 | } |
| 1413 | |
| 1414 | static void netcp_set_rx_mode(struct net_device *ndev) |
| 1415 | { |
| 1416 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1417 | struct netdev_hw_addr *ndev_addr; |
| 1418 | bool promisc; |
| 1419 | |
| 1420 | promisc = (ndev->flags & IFF_PROMISC || |
| 1421 | ndev->flags & IFF_ALLMULTI || |
| 1422 | netdev_mc_count(ndev) > NETCP_MAX_MCAST_ADDR); |
| 1423 | |
| 1424 | /* first clear all marks */ |
| 1425 | netcp_addr_clear_mark(netcp); |
| 1426 | |
| 1427 | /* next add new entries, mark existing ones */ |
| 1428 | netcp_addr_add_mark(netcp, ndev->broadcast, ADDR_BCAST); |
| 1429 | for_each_dev_addr(ndev, ndev_addr) |
| 1430 | netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_DEV); |
| 1431 | netdev_for_each_uc_addr(ndev_addr, ndev) |
| 1432 | netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_UCAST); |
| 1433 | netdev_for_each_mc_addr(ndev_addr, ndev) |
| 1434 | netcp_addr_add_mark(netcp, ndev_addr->addr, ADDR_MCAST); |
| 1435 | |
| 1436 | if (promisc) |
| 1437 | netcp_addr_add_mark(netcp, NULL, ADDR_ANY); |
| 1438 | |
| 1439 | /* finally sweep and callout into modules */ |
| 1440 | netcp_addr_sweep_del(netcp); |
| 1441 | netcp_addr_sweep_add(netcp); |
| 1442 | } |
| 1443 | |
| 1444 | static void netcp_free_navigator_resources(struct netcp_intf *netcp) |
| 1445 | { |
| 1446 | int i; |
| 1447 | |
| 1448 | if (netcp->rx_channel) { |
| 1449 | knav_dma_close_channel(netcp->rx_channel); |
| 1450 | netcp->rx_channel = NULL; |
| 1451 | } |
| 1452 | |
| 1453 | if (!IS_ERR_OR_NULL(netcp->rx_pool)) |
| 1454 | netcp_rxpool_free(netcp); |
| 1455 | |
| 1456 | if (!IS_ERR_OR_NULL(netcp->rx_queue)) { |
| 1457 | knav_queue_close(netcp->rx_queue); |
| 1458 | netcp->rx_queue = NULL; |
| 1459 | } |
| 1460 | |
| 1461 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && |
| 1462 | !IS_ERR_OR_NULL(netcp->rx_fdq[i]) ; ++i) { |
| 1463 | knav_queue_close(netcp->rx_fdq[i]); |
| 1464 | netcp->rx_fdq[i] = NULL; |
| 1465 | } |
| 1466 | |
| 1467 | if (!IS_ERR_OR_NULL(netcp->tx_compl_q)) { |
| 1468 | knav_queue_close(netcp->tx_compl_q); |
| 1469 | netcp->tx_compl_q = NULL; |
| 1470 | } |
| 1471 | |
| 1472 | if (!IS_ERR_OR_NULL(netcp->tx_pool)) { |
| 1473 | knav_pool_destroy(netcp->tx_pool); |
| 1474 | netcp->tx_pool = NULL; |
| 1475 | } |
| 1476 | } |
| 1477 | |
| 1478 | static int netcp_setup_navigator_resources(struct net_device *ndev) |
| 1479 | { |
| 1480 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1481 | struct knav_queue_notify_config notify_cfg; |
| 1482 | struct knav_dma_cfg config; |
| 1483 | u32 last_fdq = 0; |
| 1484 | u8 name[16]; |
| 1485 | int ret; |
| 1486 | int i; |
| 1487 | |
| 1488 | /* Create Rx/Tx descriptor pools */ |
| 1489 | snprintf(name, sizeof(name), "rx-pool-%s", ndev->name); |
| 1490 | netcp->rx_pool = knav_pool_create(name, netcp->rx_pool_size, |
| 1491 | netcp->rx_pool_region_id); |
| 1492 | if (IS_ERR_OR_NULL(netcp->rx_pool)) { |
| 1493 | dev_err(netcp->ndev_dev, "Couldn't create rx pool\n"); |
| 1494 | ret = PTR_ERR(netcp->rx_pool); |
| 1495 | goto fail; |
| 1496 | } |
| 1497 | |
| 1498 | snprintf(name, sizeof(name), "tx-pool-%s", ndev->name); |
| 1499 | netcp->tx_pool = knav_pool_create(name, netcp->tx_pool_size, |
| 1500 | netcp->tx_pool_region_id); |
| 1501 | if (IS_ERR_OR_NULL(netcp->tx_pool)) { |
| 1502 | dev_err(netcp->ndev_dev, "Couldn't create tx pool\n"); |
| 1503 | ret = PTR_ERR(netcp->tx_pool); |
| 1504 | goto fail; |
| 1505 | } |
| 1506 | |
| 1507 | /* open Tx completion queue */ |
| 1508 | snprintf(name, sizeof(name), "tx-compl-%s", ndev->name); |
| 1509 | netcp->tx_compl_q = knav_queue_open(name, netcp->tx_compl_qid, 0); |
| 1510 | if (IS_ERR_OR_NULL(netcp->tx_compl_q)) { |
| 1511 | ret = PTR_ERR(netcp->tx_compl_q); |
| 1512 | goto fail; |
| 1513 | } |
| 1514 | netcp->tx_compl_qid = knav_queue_get_id(netcp->tx_compl_q); |
| 1515 | |
| 1516 | /* Set notification for Tx completion */ |
| 1517 | notify_cfg.fn = netcp_tx_notify; |
| 1518 | notify_cfg.fn_arg = netcp; |
| 1519 | ret = knav_queue_device_control(netcp->tx_compl_q, |
| 1520 | KNAV_QUEUE_SET_NOTIFIER, |
| 1521 | (unsigned long)¬ify_cfg); |
| 1522 | if (ret) |
| 1523 | goto fail; |
| 1524 | |
| 1525 | knav_queue_disable_notify(netcp->tx_compl_q); |
| 1526 | |
| 1527 | /* open Rx completion queue */ |
| 1528 | snprintf(name, sizeof(name), "rx-compl-%s", ndev->name); |
| 1529 | netcp->rx_queue = knav_queue_open(name, netcp->rx_queue_id, 0); |
| 1530 | if (IS_ERR_OR_NULL(netcp->rx_queue)) { |
| 1531 | ret = PTR_ERR(netcp->rx_queue); |
| 1532 | goto fail; |
| 1533 | } |
| 1534 | netcp->rx_queue_id = knav_queue_get_id(netcp->rx_queue); |
| 1535 | |
| 1536 | /* Set notification for Rx completion */ |
| 1537 | notify_cfg.fn = netcp_rx_notify; |
| 1538 | notify_cfg.fn_arg = netcp; |
| 1539 | ret = knav_queue_device_control(netcp->rx_queue, |
| 1540 | KNAV_QUEUE_SET_NOTIFIER, |
| 1541 | (unsigned long)¬ify_cfg); |
| 1542 | if (ret) |
| 1543 | goto fail; |
| 1544 | |
| 1545 | knav_queue_disable_notify(netcp->rx_queue); |
| 1546 | |
| 1547 | /* open Rx FDQs */ |
WingMan Kwok | 866b8b1 | 2015-08-04 16:56:53 -0400 | [diff] [blame] | 1548 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN && netcp->rx_queue_depths[i]; |
| 1549 | ++i) { |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1550 | snprintf(name, sizeof(name), "rx-fdq-%s-%d", ndev->name, i); |
| 1551 | netcp->rx_fdq[i] = knav_queue_open(name, KNAV_QUEUE_GP, 0); |
| 1552 | if (IS_ERR_OR_NULL(netcp->rx_fdq[i])) { |
| 1553 | ret = PTR_ERR(netcp->rx_fdq[i]); |
| 1554 | goto fail; |
| 1555 | } |
| 1556 | } |
| 1557 | |
| 1558 | memset(&config, 0, sizeof(config)); |
| 1559 | config.direction = DMA_DEV_TO_MEM; |
| 1560 | config.u.rx.einfo_present = true; |
| 1561 | config.u.rx.psinfo_present = true; |
| 1562 | config.u.rx.err_mode = DMA_DROP; |
| 1563 | config.u.rx.desc_type = DMA_DESC_HOST; |
| 1564 | config.u.rx.psinfo_at_sop = false; |
| 1565 | config.u.rx.sop_offset = NETCP_SOP_OFFSET; |
| 1566 | config.u.rx.dst_q = netcp->rx_queue_id; |
| 1567 | config.u.rx.thresh = DMA_THRESH_NONE; |
| 1568 | |
| 1569 | for (i = 0; i < KNAV_DMA_FDQ_PER_CHAN; ++i) { |
| 1570 | if (netcp->rx_fdq[i]) |
| 1571 | last_fdq = knav_queue_get_id(netcp->rx_fdq[i]); |
| 1572 | config.u.rx.fdq[i] = last_fdq; |
| 1573 | } |
| 1574 | |
| 1575 | netcp->rx_channel = knav_dma_open_channel(netcp->netcp_device->device, |
| 1576 | netcp->dma_chan_name, &config); |
| 1577 | if (IS_ERR_OR_NULL(netcp->rx_channel)) { |
| 1578 | dev_err(netcp->ndev_dev, "failed opening rx chan(%s\n", |
| 1579 | netcp->dma_chan_name); |
| 1580 | goto fail; |
| 1581 | } |
| 1582 | |
| 1583 | dev_dbg(netcp->ndev_dev, "opened RX channel: %p\n", netcp->rx_channel); |
| 1584 | return 0; |
| 1585 | |
| 1586 | fail: |
| 1587 | netcp_free_navigator_resources(netcp); |
| 1588 | return ret; |
| 1589 | } |
| 1590 | |
| 1591 | /* Open the device */ |
| 1592 | static int netcp_ndo_open(struct net_device *ndev) |
| 1593 | { |
| 1594 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1595 | struct netcp_intf_modpriv *intf_modpriv; |
| 1596 | struct netcp_module *module; |
| 1597 | int ret; |
| 1598 | |
| 1599 | netif_carrier_off(ndev); |
| 1600 | ret = netcp_setup_navigator_resources(ndev); |
| 1601 | if (ret) { |
| 1602 | dev_err(netcp->ndev_dev, "Failed to setup navigator resources\n"); |
| 1603 | goto fail; |
| 1604 | } |
| 1605 | |
| 1606 | mutex_lock(&netcp_modules_lock); |
| 1607 | for_each_module(netcp, intf_modpriv) { |
| 1608 | module = intf_modpriv->netcp_module; |
| 1609 | if (module->open) { |
| 1610 | ret = module->open(intf_modpriv->module_priv, ndev); |
| 1611 | if (ret != 0) { |
| 1612 | dev_err(netcp->ndev_dev, "module open failed\n"); |
| 1613 | goto fail_open; |
| 1614 | } |
| 1615 | } |
| 1616 | } |
| 1617 | mutex_unlock(&netcp_modules_lock); |
| 1618 | |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1619 | napi_enable(&netcp->rx_napi); |
| 1620 | napi_enable(&netcp->tx_napi); |
| 1621 | knav_queue_enable_notify(netcp->tx_compl_q); |
| 1622 | knav_queue_enable_notify(netcp->rx_queue); |
Karicheri, Muralidharan | 194ac06 | 2015-07-16 15:32:14 -0400 | [diff] [blame] | 1623 | netcp_rxpool_refill(netcp); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1624 | netif_tx_wake_all_queues(ndev); |
| 1625 | dev_dbg(netcp->ndev_dev, "netcp device %s opened\n", ndev->name); |
| 1626 | return 0; |
| 1627 | |
| 1628 | fail_open: |
| 1629 | for_each_module(netcp, intf_modpriv) { |
| 1630 | module = intf_modpriv->netcp_module; |
| 1631 | if (module->close) |
| 1632 | module->close(intf_modpriv->module_priv, ndev); |
| 1633 | } |
| 1634 | mutex_unlock(&netcp_modules_lock); |
| 1635 | |
| 1636 | fail: |
| 1637 | netcp_free_navigator_resources(netcp); |
| 1638 | return ret; |
| 1639 | } |
| 1640 | |
| 1641 | /* Close the device */ |
| 1642 | static int netcp_ndo_stop(struct net_device *ndev) |
| 1643 | { |
| 1644 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1645 | struct netcp_intf_modpriv *intf_modpriv; |
| 1646 | struct netcp_module *module; |
| 1647 | int err = 0; |
| 1648 | |
| 1649 | netif_tx_stop_all_queues(ndev); |
| 1650 | netif_carrier_off(ndev); |
| 1651 | netcp_addr_clear_mark(netcp); |
| 1652 | netcp_addr_sweep_del(netcp); |
| 1653 | knav_queue_disable_notify(netcp->rx_queue); |
| 1654 | knav_queue_disable_notify(netcp->tx_compl_q); |
| 1655 | napi_disable(&netcp->rx_napi); |
| 1656 | napi_disable(&netcp->tx_napi); |
| 1657 | |
| 1658 | mutex_lock(&netcp_modules_lock); |
| 1659 | for_each_module(netcp, intf_modpriv) { |
| 1660 | module = intf_modpriv->netcp_module; |
| 1661 | if (module->close) { |
| 1662 | err = module->close(intf_modpriv->module_priv, ndev); |
| 1663 | if (err != 0) |
| 1664 | dev_err(netcp->ndev_dev, "Close failed\n"); |
| 1665 | } |
| 1666 | } |
| 1667 | mutex_unlock(&netcp_modules_lock); |
| 1668 | |
| 1669 | /* Recycle Rx descriptors from completion queue */ |
| 1670 | netcp_empty_rx_queue(netcp); |
| 1671 | |
| 1672 | /* Recycle Tx descriptors from completion queue */ |
| 1673 | netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size); |
| 1674 | |
| 1675 | if (knav_pool_count(netcp->tx_pool) != netcp->tx_pool_size) |
| 1676 | dev_err(netcp->ndev_dev, "Lost (%d) Tx descs\n", |
| 1677 | netcp->tx_pool_size - knav_pool_count(netcp->tx_pool)); |
| 1678 | |
| 1679 | netcp_free_navigator_resources(netcp); |
| 1680 | dev_dbg(netcp->ndev_dev, "netcp device %s stopped\n", ndev->name); |
| 1681 | return 0; |
| 1682 | } |
| 1683 | |
| 1684 | static int netcp_ndo_ioctl(struct net_device *ndev, |
| 1685 | struct ifreq *req, int cmd) |
| 1686 | { |
| 1687 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1688 | struct netcp_intf_modpriv *intf_modpriv; |
| 1689 | struct netcp_module *module; |
| 1690 | int ret = -1, err = -EOPNOTSUPP; |
| 1691 | |
| 1692 | if (!netif_running(ndev)) |
| 1693 | return -EINVAL; |
| 1694 | |
| 1695 | mutex_lock(&netcp_modules_lock); |
| 1696 | for_each_module(netcp, intf_modpriv) { |
| 1697 | module = intf_modpriv->netcp_module; |
| 1698 | if (!module->ioctl) |
| 1699 | continue; |
| 1700 | |
| 1701 | err = module->ioctl(intf_modpriv->module_priv, req, cmd); |
| 1702 | if ((err < 0) && (err != -EOPNOTSUPP)) { |
| 1703 | ret = err; |
| 1704 | goto out; |
| 1705 | } |
| 1706 | if (err == 0) |
| 1707 | ret = err; |
| 1708 | } |
| 1709 | |
| 1710 | out: |
| 1711 | mutex_unlock(&netcp_modules_lock); |
| 1712 | return (ret == 0) ? 0 : err; |
| 1713 | } |
| 1714 | |
| 1715 | static int netcp_ndo_change_mtu(struct net_device *ndev, int new_mtu) |
| 1716 | { |
| 1717 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1718 | |
| 1719 | /* MTU < 68 is an error for IPv4 traffic */ |
| 1720 | if ((new_mtu < 68) || |
| 1721 | (new_mtu > (NETCP_MAX_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN))) { |
| 1722 | dev_err(netcp->ndev_dev, "Invalid mtu size = %d\n", new_mtu); |
| 1723 | return -EINVAL; |
| 1724 | } |
| 1725 | |
| 1726 | ndev->mtu = new_mtu; |
| 1727 | return 0; |
| 1728 | } |
| 1729 | |
| 1730 | static void netcp_ndo_tx_timeout(struct net_device *ndev) |
| 1731 | { |
| 1732 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1733 | unsigned int descs = knav_pool_count(netcp->tx_pool); |
| 1734 | |
| 1735 | dev_err(netcp->ndev_dev, "transmit timed out tx descs(%d)\n", descs); |
| 1736 | netcp_process_tx_compl_packets(netcp, netcp->tx_pool_size); |
| 1737 | ndev->trans_start = jiffies; |
| 1738 | netif_tx_wake_all_queues(ndev); |
| 1739 | } |
| 1740 | |
| 1741 | static int netcp_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid) |
| 1742 | { |
| 1743 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1744 | struct netcp_intf_modpriv *intf_modpriv; |
| 1745 | struct netcp_module *module; |
| 1746 | int err = 0; |
| 1747 | |
| 1748 | dev_dbg(netcp->ndev_dev, "adding rx vlan id: %d\n", vid); |
| 1749 | |
| 1750 | mutex_lock(&netcp_modules_lock); |
| 1751 | for_each_module(netcp, intf_modpriv) { |
| 1752 | module = intf_modpriv->netcp_module; |
| 1753 | if ((module->add_vid) && (vid != 0)) { |
| 1754 | err = module->add_vid(intf_modpriv->module_priv, vid); |
| 1755 | if (err != 0) { |
| 1756 | dev_err(netcp->ndev_dev, "Could not add vlan id = %d\n", |
| 1757 | vid); |
| 1758 | break; |
| 1759 | } |
| 1760 | } |
| 1761 | } |
| 1762 | mutex_unlock(&netcp_modules_lock); |
| 1763 | return err; |
| 1764 | } |
| 1765 | |
| 1766 | static int netcp_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid) |
| 1767 | { |
| 1768 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1769 | struct netcp_intf_modpriv *intf_modpriv; |
| 1770 | struct netcp_module *module; |
| 1771 | int err = 0; |
| 1772 | |
| 1773 | dev_dbg(netcp->ndev_dev, "removing rx vlan id: %d\n", vid); |
| 1774 | |
| 1775 | mutex_lock(&netcp_modules_lock); |
| 1776 | for_each_module(netcp, intf_modpriv) { |
| 1777 | module = intf_modpriv->netcp_module; |
| 1778 | if (module->del_vid) { |
| 1779 | err = module->del_vid(intf_modpriv->module_priv, vid); |
| 1780 | if (err != 0) { |
| 1781 | dev_err(netcp->ndev_dev, "Could not delete vlan id = %d\n", |
| 1782 | vid); |
| 1783 | break; |
| 1784 | } |
| 1785 | } |
| 1786 | } |
| 1787 | mutex_unlock(&netcp_modules_lock); |
| 1788 | return err; |
| 1789 | } |
| 1790 | |
| 1791 | static u16 netcp_select_queue(struct net_device *dev, struct sk_buff *skb, |
| 1792 | void *accel_priv, |
| 1793 | select_queue_fallback_t fallback) |
| 1794 | { |
| 1795 | return 0; |
| 1796 | } |
| 1797 | |
| 1798 | static int netcp_setup_tc(struct net_device *dev, u8 num_tc) |
| 1799 | { |
| 1800 | int i; |
| 1801 | |
| 1802 | /* setup tc must be called under rtnl lock */ |
| 1803 | ASSERT_RTNL(); |
| 1804 | |
| 1805 | /* Sanity-check the number of traffic classes requested */ |
| 1806 | if ((dev->real_num_tx_queues <= 1) || |
| 1807 | (dev->real_num_tx_queues < num_tc)) |
| 1808 | return -EINVAL; |
| 1809 | |
| 1810 | /* Configure traffic class to queue mappings */ |
| 1811 | if (num_tc) { |
| 1812 | netdev_set_num_tc(dev, num_tc); |
| 1813 | for (i = 0; i < num_tc; i++) |
| 1814 | netdev_set_tc_queue(dev, i, 1, i); |
| 1815 | } else { |
| 1816 | netdev_reset_tc(dev); |
| 1817 | } |
| 1818 | |
| 1819 | return 0; |
| 1820 | } |
| 1821 | |
| 1822 | static const struct net_device_ops netcp_netdev_ops = { |
| 1823 | .ndo_open = netcp_ndo_open, |
| 1824 | .ndo_stop = netcp_ndo_stop, |
| 1825 | .ndo_start_xmit = netcp_ndo_start_xmit, |
| 1826 | .ndo_set_rx_mode = netcp_set_rx_mode, |
| 1827 | .ndo_do_ioctl = netcp_ndo_ioctl, |
| 1828 | .ndo_change_mtu = netcp_ndo_change_mtu, |
| 1829 | .ndo_set_mac_address = eth_mac_addr, |
| 1830 | .ndo_validate_addr = eth_validate_addr, |
| 1831 | .ndo_vlan_rx_add_vid = netcp_rx_add_vid, |
| 1832 | .ndo_vlan_rx_kill_vid = netcp_rx_kill_vid, |
| 1833 | .ndo_tx_timeout = netcp_ndo_tx_timeout, |
| 1834 | .ndo_select_queue = netcp_select_queue, |
| 1835 | .ndo_setup_tc = netcp_setup_tc, |
| 1836 | }; |
| 1837 | |
| 1838 | static int netcp_create_interface(struct netcp_device *netcp_device, |
| 1839 | struct device_node *node_interface) |
| 1840 | { |
| 1841 | struct device *dev = netcp_device->device; |
| 1842 | struct device_node *node = dev->of_node; |
| 1843 | struct netcp_intf *netcp; |
| 1844 | struct net_device *ndev; |
| 1845 | resource_size_t size; |
| 1846 | struct resource res; |
| 1847 | void __iomem *efuse = NULL; |
| 1848 | u32 efuse_mac = 0; |
| 1849 | const void *mac_addr; |
| 1850 | u8 efuse_mac_addr[6]; |
| 1851 | u32 temp[2]; |
| 1852 | int ret = 0; |
| 1853 | |
| 1854 | ndev = alloc_etherdev_mqs(sizeof(*netcp), 1, 1); |
| 1855 | if (!ndev) { |
| 1856 | dev_err(dev, "Error allocating netdev\n"); |
| 1857 | return -ENOMEM; |
| 1858 | } |
| 1859 | |
| 1860 | ndev->features |= NETIF_F_SG; |
| 1861 | ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; |
| 1862 | ndev->hw_features = ndev->features; |
| 1863 | ndev->vlan_features |= NETIF_F_SG; |
| 1864 | |
| 1865 | netcp = netdev_priv(ndev); |
| 1866 | spin_lock_init(&netcp->lock); |
| 1867 | INIT_LIST_HEAD(&netcp->module_head); |
| 1868 | INIT_LIST_HEAD(&netcp->txhook_list_head); |
| 1869 | INIT_LIST_HEAD(&netcp->rxhook_list_head); |
| 1870 | INIT_LIST_HEAD(&netcp->addr_list); |
| 1871 | netcp->netcp_device = netcp_device; |
| 1872 | netcp->dev = netcp_device->device; |
| 1873 | netcp->ndev = ndev; |
| 1874 | netcp->ndev_dev = &ndev->dev; |
| 1875 | netcp->msg_enable = netif_msg_init(netcp_debug_level, NETCP_DEBUG); |
| 1876 | netcp->tx_pause_threshold = MAX_SKB_FRAGS; |
| 1877 | netcp->tx_resume_threshold = netcp->tx_pause_threshold; |
| 1878 | netcp->node_interface = node_interface; |
| 1879 | |
| 1880 | ret = of_property_read_u32(node_interface, "efuse-mac", &efuse_mac); |
| 1881 | if (efuse_mac) { |
| 1882 | if (of_address_to_resource(node, NETCP_EFUSE_REG_INDEX, &res)) { |
| 1883 | dev_err(dev, "could not find efuse-mac reg resource\n"); |
| 1884 | ret = -ENODEV; |
| 1885 | goto quit; |
| 1886 | } |
| 1887 | size = resource_size(&res); |
| 1888 | |
| 1889 | if (!devm_request_mem_region(dev, res.start, size, |
| 1890 | dev_name(dev))) { |
| 1891 | dev_err(dev, "could not reserve resource\n"); |
| 1892 | ret = -ENOMEM; |
| 1893 | goto quit; |
| 1894 | } |
| 1895 | |
| 1896 | efuse = devm_ioremap_nocache(dev, res.start, size); |
| 1897 | if (!efuse) { |
| 1898 | dev_err(dev, "could not map resource\n"); |
| 1899 | devm_release_mem_region(dev, res.start, size); |
| 1900 | ret = -ENOMEM; |
| 1901 | goto quit; |
| 1902 | } |
| 1903 | |
| 1904 | emac_arch_get_mac_addr(efuse_mac_addr, efuse); |
| 1905 | if (is_valid_ether_addr(efuse_mac_addr)) |
| 1906 | ether_addr_copy(ndev->dev_addr, efuse_mac_addr); |
| 1907 | else |
| 1908 | random_ether_addr(ndev->dev_addr); |
| 1909 | |
| 1910 | devm_iounmap(dev, efuse); |
| 1911 | devm_release_mem_region(dev, res.start, size); |
| 1912 | } else { |
| 1913 | mac_addr = of_get_mac_address(node_interface); |
| 1914 | if (mac_addr) |
| 1915 | ether_addr_copy(ndev->dev_addr, mac_addr); |
| 1916 | else |
| 1917 | random_ether_addr(ndev->dev_addr); |
| 1918 | } |
| 1919 | |
| 1920 | ret = of_property_read_string(node_interface, "rx-channel", |
| 1921 | &netcp->dma_chan_name); |
| 1922 | if (ret < 0) { |
| 1923 | dev_err(dev, "missing \"rx-channel\" parameter\n"); |
| 1924 | ret = -ENODEV; |
| 1925 | goto quit; |
| 1926 | } |
| 1927 | |
| 1928 | ret = of_property_read_u32(node_interface, "rx-queue", |
| 1929 | &netcp->rx_queue_id); |
| 1930 | if (ret < 0) { |
| 1931 | dev_warn(dev, "missing \"rx-queue\" parameter\n"); |
| 1932 | netcp->rx_queue_id = KNAV_QUEUE_QPEND; |
| 1933 | } |
| 1934 | |
| 1935 | ret = of_property_read_u32_array(node_interface, "rx-queue-depth", |
| 1936 | netcp->rx_queue_depths, |
| 1937 | KNAV_DMA_FDQ_PER_CHAN); |
| 1938 | if (ret < 0) { |
| 1939 | dev_err(dev, "missing \"rx-queue-depth\" parameter\n"); |
| 1940 | netcp->rx_queue_depths[0] = 128; |
| 1941 | } |
| 1942 | |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 1943 | ret = of_property_read_u32_array(node_interface, "rx-pool", temp, 2); |
| 1944 | if (ret < 0) { |
| 1945 | dev_err(dev, "missing \"rx-pool\" parameter\n"); |
| 1946 | ret = -ENODEV; |
| 1947 | goto quit; |
| 1948 | } |
| 1949 | netcp->rx_pool_size = temp[0]; |
| 1950 | netcp->rx_pool_region_id = temp[1]; |
| 1951 | |
| 1952 | ret = of_property_read_u32_array(node_interface, "tx-pool", temp, 2); |
| 1953 | if (ret < 0) { |
| 1954 | dev_err(dev, "missing \"tx-pool\" parameter\n"); |
| 1955 | ret = -ENODEV; |
| 1956 | goto quit; |
| 1957 | } |
| 1958 | netcp->tx_pool_size = temp[0]; |
| 1959 | netcp->tx_pool_region_id = temp[1]; |
| 1960 | |
| 1961 | if (netcp->tx_pool_size < MAX_SKB_FRAGS) { |
| 1962 | dev_err(dev, "tx-pool size too small, must be atleast(%ld)\n", |
| 1963 | MAX_SKB_FRAGS); |
| 1964 | ret = -ENODEV; |
| 1965 | goto quit; |
| 1966 | } |
| 1967 | |
| 1968 | ret = of_property_read_u32(node_interface, "tx-completion-queue", |
| 1969 | &netcp->tx_compl_qid); |
| 1970 | if (ret < 0) { |
| 1971 | dev_warn(dev, "missing \"tx-completion-queue\" parameter\n"); |
| 1972 | netcp->tx_compl_qid = KNAV_QUEUE_QPEND; |
| 1973 | } |
| 1974 | |
| 1975 | /* NAPI register */ |
| 1976 | netif_napi_add(ndev, &netcp->rx_napi, netcp_rx_poll, NETCP_NAPI_WEIGHT); |
| 1977 | netif_napi_add(ndev, &netcp->tx_napi, netcp_tx_poll, NETCP_NAPI_WEIGHT); |
| 1978 | |
| 1979 | /* Register the network device */ |
| 1980 | ndev->dev_id = 0; |
| 1981 | ndev->watchdog_timeo = NETCP_TX_TIMEOUT; |
| 1982 | ndev->netdev_ops = &netcp_netdev_ops; |
| 1983 | SET_NETDEV_DEV(ndev, dev); |
| 1984 | |
| 1985 | list_add_tail(&netcp->interface_list, &netcp_device->interface_head); |
| 1986 | return 0; |
| 1987 | |
| 1988 | quit: |
| 1989 | free_netdev(ndev); |
| 1990 | return ret; |
| 1991 | } |
| 1992 | |
| 1993 | static void netcp_delete_interface(struct netcp_device *netcp_device, |
| 1994 | struct net_device *ndev) |
| 1995 | { |
| 1996 | struct netcp_intf_modpriv *intf_modpriv, *tmp; |
| 1997 | struct netcp_intf *netcp = netdev_priv(ndev); |
| 1998 | struct netcp_module *module; |
| 1999 | |
| 2000 | dev_dbg(netcp_device->device, "Removing interface \"%s\"\n", |
| 2001 | ndev->name); |
| 2002 | |
| 2003 | /* Notify each of the modules that the interface is going away */ |
| 2004 | list_for_each_entry_safe(intf_modpriv, tmp, &netcp->module_head, |
| 2005 | intf_list) { |
| 2006 | module = intf_modpriv->netcp_module; |
| 2007 | dev_dbg(netcp_device->device, "Releasing module \"%s\"\n", |
| 2008 | module->name); |
| 2009 | if (module->release) |
| 2010 | module->release(intf_modpriv->module_priv); |
| 2011 | list_del(&intf_modpriv->intf_list); |
| 2012 | kfree(intf_modpriv); |
| 2013 | } |
| 2014 | WARN(!list_empty(&netcp->module_head), "%s interface module list is not empty!\n", |
| 2015 | ndev->name); |
| 2016 | |
| 2017 | list_del(&netcp->interface_list); |
| 2018 | |
| 2019 | of_node_put(netcp->node_interface); |
| 2020 | unregister_netdev(ndev); |
| 2021 | netif_napi_del(&netcp->rx_napi); |
| 2022 | free_netdev(ndev); |
| 2023 | } |
| 2024 | |
| 2025 | static int netcp_probe(struct platform_device *pdev) |
| 2026 | { |
| 2027 | struct device_node *node = pdev->dev.of_node; |
| 2028 | struct netcp_intf *netcp_intf, *netcp_tmp; |
| 2029 | struct device_node *child, *interfaces; |
| 2030 | struct netcp_device *netcp_device; |
| 2031 | struct device *dev = &pdev->dev; |
| 2032 | struct netcp_module *module; |
| 2033 | int ret; |
| 2034 | |
| 2035 | if (!node) { |
| 2036 | dev_err(dev, "could not find device info\n"); |
| 2037 | return -ENODEV; |
| 2038 | } |
| 2039 | |
| 2040 | /* Allocate a new NETCP device instance */ |
| 2041 | netcp_device = devm_kzalloc(dev, sizeof(*netcp_device), GFP_KERNEL); |
| 2042 | if (!netcp_device) |
| 2043 | return -ENOMEM; |
| 2044 | |
| 2045 | pm_runtime_enable(&pdev->dev); |
| 2046 | ret = pm_runtime_get_sync(&pdev->dev); |
| 2047 | if (ret < 0) { |
| 2048 | dev_err(dev, "Failed to enable NETCP power-domain\n"); |
| 2049 | pm_runtime_disable(&pdev->dev); |
| 2050 | return ret; |
| 2051 | } |
| 2052 | |
| 2053 | /* Initialize the NETCP device instance */ |
| 2054 | INIT_LIST_HEAD(&netcp_device->interface_head); |
| 2055 | INIT_LIST_HEAD(&netcp_device->modpriv_head); |
| 2056 | netcp_device->device = dev; |
| 2057 | platform_set_drvdata(pdev, netcp_device); |
| 2058 | |
| 2059 | /* create interfaces */ |
| 2060 | interfaces = of_get_child_by_name(node, "netcp-interfaces"); |
| 2061 | if (!interfaces) { |
| 2062 | dev_err(dev, "could not find netcp-interfaces node\n"); |
| 2063 | ret = -ENODEV; |
| 2064 | goto probe_quit; |
| 2065 | } |
| 2066 | |
| 2067 | for_each_available_child_of_node(interfaces, child) { |
| 2068 | ret = netcp_create_interface(netcp_device, child); |
| 2069 | if (ret) { |
| 2070 | dev_err(dev, "could not create interface(%s)\n", |
| 2071 | child->name); |
| 2072 | goto probe_quit_interface; |
| 2073 | } |
| 2074 | } |
| 2075 | |
| 2076 | /* Add the device instance to the list */ |
| 2077 | list_add_tail(&netcp_device->device_list, &netcp_devices); |
| 2078 | |
| 2079 | /* Probe & attach any modules already registered */ |
| 2080 | mutex_lock(&netcp_modules_lock); |
| 2081 | for_each_netcp_module(module) { |
| 2082 | ret = netcp_module_probe(netcp_device, module); |
| 2083 | if (ret < 0) |
| 2084 | dev_err(dev, "module(%s) probe failed\n", module->name); |
| 2085 | } |
| 2086 | mutex_unlock(&netcp_modules_lock); |
| 2087 | return 0; |
| 2088 | |
| 2089 | probe_quit_interface: |
| 2090 | list_for_each_entry_safe(netcp_intf, netcp_tmp, |
| 2091 | &netcp_device->interface_head, |
| 2092 | interface_list) { |
| 2093 | netcp_delete_interface(netcp_device, netcp_intf->ndev); |
| 2094 | } |
| 2095 | |
| 2096 | probe_quit: |
| 2097 | pm_runtime_put_sync(&pdev->dev); |
| 2098 | pm_runtime_disable(&pdev->dev); |
| 2099 | platform_set_drvdata(pdev, NULL); |
| 2100 | return ret; |
| 2101 | } |
| 2102 | |
| 2103 | static int netcp_remove(struct platform_device *pdev) |
| 2104 | { |
| 2105 | struct netcp_device *netcp_device = platform_get_drvdata(pdev); |
Karicheri, Muralidharan | 01a0309 | 2015-07-28 18:20:12 -0400 | [diff] [blame] | 2106 | struct netcp_intf *netcp_intf, *netcp_tmp; |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 2107 | struct netcp_inst_modpriv *inst_modpriv, *tmp; |
| 2108 | struct netcp_module *module; |
| 2109 | |
| 2110 | list_for_each_entry_safe(inst_modpriv, tmp, &netcp_device->modpriv_head, |
| 2111 | inst_list) { |
| 2112 | module = inst_modpriv->netcp_module; |
| 2113 | dev_dbg(&pdev->dev, "Removing module \"%s\"\n", module->name); |
| 2114 | module->remove(netcp_device, inst_modpriv->module_priv); |
| 2115 | list_del(&inst_modpriv->inst_list); |
| 2116 | kfree(inst_modpriv); |
| 2117 | } |
Karicheri, Muralidharan | 01a0309 | 2015-07-28 18:20:12 -0400 | [diff] [blame] | 2118 | |
| 2119 | /* now that all modules are removed, clean up the interfaces */ |
| 2120 | list_for_each_entry_safe(netcp_intf, netcp_tmp, |
| 2121 | &netcp_device->interface_head, |
| 2122 | interface_list) { |
| 2123 | netcp_delete_interface(netcp_device, netcp_intf->ndev); |
| 2124 | } |
| 2125 | |
| 2126 | WARN(!list_empty(&netcp_device->interface_head), |
| 2127 | "%s interface list not empty!\n", pdev->name); |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 2128 | |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 2129 | pm_runtime_put_sync(&pdev->dev); |
| 2130 | pm_runtime_disable(&pdev->dev); |
| 2131 | platform_set_drvdata(pdev, NULL); |
| 2132 | return 0; |
| 2133 | } |
| 2134 | |
Fabian Frederick | 1156c96 | 2015-03-17 19:37:32 +0100 | [diff] [blame] | 2135 | static const struct of_device_id of_match[] = { |
Karicheri, Muralidharan | 84640e2 | 2015-01-15 19:12:50 -0500 | [diff] [blame] | 2136 | { .compatible = "ti,netcp-1.0", }, |
| 2137 | {}, |
| 2138 | }; |
| 2139 | MODULE_DEVICE_TABLE(of, of_match); |
| 2140 | |
| 2141 | static struct platform_driver netcp_driver = { |
| 2142 | .driver = { |
| 2143 | .name = "netcp-1.0", |
| 2144 | .owner = THIS_MODULE, |
| 2145 | .of_match_table = of_match, |
| 2146 | }, |
| 2147 | .probe = netcp_probe, |
| 2148 | .remove = netcp_remove, |
| 2149 | }; |
| 2150 | module_platform_driver(netcp_driver); |
| 2151 | |
| 2152 | MODULE_LICENSE("GPL v2"); |
| 2153 | MODULE_DESCRIPTION("TI NETCP driver for Keystone SOCs"); |
| 2154 | MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com"); |