1 /* 2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 * 5 * This program is free software; you may redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16 * SOFTWARE. 17 * 18 */ 19 20 #include <linux/kernel.h> 21 #include <linux/errno.h> 22 #include <linux/types.h> 23 #include <linux/pci.h> 24 #include <linux/netdevice.h> 25 26 #include "wq_enet_desc.h" 27 #include "rq_enet_desc.h" 28 #include "cq_enet_desc.h" 29 #include "vnic_resource.h" 30 #include "vnic_enet.h" 31 #include "vnic_dev.h" 32 #include "vnic_wq.h" 33 #include "vnic_rq.h" 34 #include "vnic_cq.h" 35 #include "vnic_intr.h" 36 #include "vnic_stats.h" 37 #include "vnic_nic.h" 38 #include "vnic_rss.h" 39 #include "enic_res.h" 40 #include "enic.h" 41 42 int enic_get_vnic_config(struct enic *enic) 43 { 44 struct vnic_enet_config *c = &enic->config; 45 int err; 46 47 err = vnic_dev_get_mac_addr(enic->vdev, enic->mac_addr); 48 if (err) { 49 dev_err(enic_get_dev(enic), 50 "Error getting MAC addr, %d\n", err); 51 return err; 52 } 53 54 #define GET_CONFIG(m) \ 55 do { \ 56 err = vnic_dev_spec(enic->vdev, \ 57 offsetof(struct vnic_enet_config, m), \ 58 sizeof(c->m), &c->m); \ 59 if (err) { \ 60 dev_err(enic_get_dev(enic), \ 61 "Error getting %s, %d\n", #m, err); \ 62 return err; \ 63 } \ 64 } while (0) 65 66 GET_CONFIG(flags); 67 GET_CONFIG(wq_desc_count); 68 GET_CONFIG(rq_desc_count); 69 GET_CONFIG(mtu); 70 GET_CONFIG(intr_timer_type); 71 GET_CONFIG(intr_mode); 72 GET_CONFIG(intr_timer_usec); 73 GET_CONFIG(loop_tag); 74 75 c->wq_desc_count = 76 min_t(u32, ENIC_MAX_WQ_DESCS, 77 max_t(u32, ENIC_MIN_WQ_DESCS, 78 c->wq_desc_count)); 79 c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */ 80 81 c->rq_desc_count = 82 min_t(u32, ENIC_MAX_RQ_DESCS, 83 max_t(u32, ENIC_MIN_RQ_DESCS, 84 c->rq_desc_count)); 85 c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */ 86 87 if (c->mtu == 0) 88 c->mtu = 1500; 89 c->mtu = min_t(u16, ENIC_MAX_MTU, 90 max_t(u16, ENIC_MIN_MTU, 91 c->mtu)); 92 93 c->intr_timer_usec = min_t(u32, c->intr_timer_usec, 94 vnic_dev_get_intr_coal_timer_max(enic->vdev)); 95 96 dev_info(enic_get_dev(enic), 97 "vNIC MAC addr %pM wq/rq %d/%d mtu %d\n", 98 enic->mac_addr, c->wq_desc_count, c->rq_desc_count, c->mtu); 99 100 dev_info(enic_get_dev(enic), "vNIC csum tx/rx %s/%s " 101 "tso/lro %s/%s rss %s intr mode %s type %s timer %d usec " 102 "loopback tag 0x%04x\n", 103 ENIC_SETTING(enic, TXCSUM) ? "yes" : "no", 104 ENIC_SETTING(enic, RXCSUM) ? "yes" : "no", 105 ENIC_SETTING(enic, TSO) ? "yes" : "no", 106 ENIC_SETTING(enic, LRO) ? "yes" : "no", 107 ENIC_SETTING(enic, RSS) ? "yes" : "no", 108 c->intr_mode == VENET_INTR_MODE_INTX ? "INTx" : 109 c->intr_mode == VENET_INTR_MODE_MSI ? "MSI" : 110 c->intr_mode == VENET_INTR_MODE_ANY ? "any" : 111 "unknown", 112 c->intr_timer_type == VENET_INTR_TYPE_MIN ? "min" : 113 c->intr_timer_type == VENET_INTR_TYPE_IDLE ? "idle" : 114 "unknown", 115 c->intr_timer_usec, 116 c->loop_tag); 117 118 return 0; 119 } 120 121 int enic_add_vlan(struct enic *enic, u16 vlanid) 122 { 123 u64 a0 = vlanid, a1 = 0; 124 int wait = 1000; 125 int err; 126 127 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait); 128 if (err) 129 dev_err(enic_get_dev(enic), "Can't add vlan id, %d\n", err); 130 131 return err; 132 } 133 134 int enic_del_vlan(struct enic *enic, u16 vlanid) 135 { 136 u64 a0 = vlanid, a1 = 0; 137 int wait = 1000; 138 int err; 139 140 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait); 141 if (err) 142 dev_err(enic_get_dev(enic), "Can't delete vlan id, %d\n", err); 143 144 return err; 145 } 146 147 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type, 148 u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en, 149 u8 ig_vlan_strip_en) 150 { 151 u64 a0, a1; 152 u32 nic_cfg; 153 int wait = 1000; 154 155 vnic_set_nic_cfg(&nic_cfg, rss_default_cpu, 156 rss_hash_type, rss_hash_bits, rss_base_cpu, 157 rss_enable, tso_ipid_split_en, ig_vlan_strip_en); 158 159 a0 = nic_cfg; 160 a1 = 0; 161 162 return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait); 163 } 164 165 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len) 166 { 167 u64 a0 = (u64)key_pa, a1 = len; 168 int wait = 1000; 169 170 return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait); 171 } 172 173 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len) 174 { 175 u64 a0 = (u64)cpu_pa, a1 = len; 176 int wait = 1000; 177 178 return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait); 179 } 180 181 void enic_free_vnic_resources(struct enic *enic) 182 { 183 unsigned int i; 184 185 for (i = 0; i < enic->wq_count; i++) 186 vnic_wq_free(&enic->wq[i]); 187 for (i = 0; i < enic->rq_count; i++) 188 vnic_rq_free(&enic->rq[i]); 189 for (i = 0; i < enic->cq_count; i++) 190 vnic_cq_free(&enic->cq[i]); 191 for (i = 0; i < enic->intr_count; i++) 192 vnic_intr_free(&enic->intr[i]); 193 } 194 195 void enic_get_res_counts(struct enic *enic) 196 { 197 enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ); 198 enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ); 199 enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ); 200 enic->intr_count = vnic_dev_get_res_count(enic->vdev, 201 RES_TYPE_INTR_CTRL); 202 203 dev_info(enic_get_dev(enic), 204 "vNIC resources avail: wq %d rq %d cq %d intr %d\n", 205 enic->wq_count, enic->rq_count, 206 enic->cq_count, enic->intr_count); 207 } 208 209 void enic_init_vnic_resources(struct enic *enic) 210 { 211 enum vnic_dev_intr_mode intr_mode; 212 unsigned int mask_on_assertion; 213 unsigned int interrupt_offset; 214 unsigned int error_interrupt_enable; 215 unsigned int error_interrupt_offset; 216 unsigned int cq_index; 217 unsigned int i; 218 219 intr_mode = vnic_dev_get_intr_mode(enic->vdev); 220 221 /* Init RQ/WQ resources. 222 * 223 * RQ[0 - n-1] point to CQ[0 - n-1] 224 * WQ[0 - m-1] point to CQ[n - n+m-1] 225 * 226 * Error interrupt is not enabled for MSI. 227 */ 228 229 switch (intr_mode) { 230 case VNIC_DEV_INTR_MODE_INTX: 231 case VNIC_DEV_INTR_MODE_MSIX: 232 error_interrupt_enable = 1; 233 error_interrupt_offset = enic->intr_count - 2; 234 break; 235 default: 236 error_interrupt_enable = 0; 237 error_interrupt_offset = 0; 238 break; 239 } 240 241 for (i = 0; i < enic->rq_count; i++) { 242 cq_index = i; 243 vnic_rq_init(&enic->rq[i], 244 cq_index, 245 error_interrupt_enable, 246 error_interrupt_offset); 247 } 248 249 for (i = 0; i < enic->wq_count; i++) { 250 cq_index = enic->rq_count + i; 251 vnic_wq_init(&enic->wq[i], 252 cq_index, 253 error_interrupt_enable, 254 error_interrupt_offset); 255 } 256 257 /* Init CQ resources 258 * 259 * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI 260 * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X 261 */ 262 263 for (i = 0; i < enic->cq_count; i++) { 264 265 switch (intr_mode) { 266 case VNIC_DEV_INTR_MODE_MSIX: 267 interrupt_offset = i; 268 break; 269 default: 270 interrupt_offset = 0; 271 break; 272 } 273 274 vnic_cq_init(&enic->cq[i], 275 0 /* flow_control_enable */, 276 1 /* color_enable */, 277 0 /* cq_head */, 278 0 /* cq_tail */, 279 1 /* cq_tail_color */, 280 1 /* interrupt_enable */, 281 1 /* cq_entry_enable */, 282 0 /* cq_message_enable */, 283 interrupt_offset, 284 0 /* cq_message_addr */); 285 } 286 287 /* Init INTR resources 288 * 289 * mask_on_assertion is not used for INTx due to the level- 290 * triggered nature of INTx 291 */ 292 293 switch (intr_mode) { 294 case VNIC_DEV_INTR_MODE_MSI: 295 case VNIC_DEV_INTR_MODE_MSIX: 296 mask_on_assertion = 1; 297 break; 298 default: 299 mask_on_assertion = 0; 300 break; 301 } 302 303 for (i = 0; i < enic->intr_count; i++) { 304 vnic_intr_init(&enic->intr[i], 305 enic->config.intr_timer_usec, 306 enic->config.intr_timer_type, 307 mask_on_assertion); 308 } 309 } 310 311 int enic_alloc_vnic_resources(struct enic *enic) 312 { 313 enum vnic_dev_intr_mode intr_mode; 314 unsigned int i; 315 int err; 316 317 intr_mode = vnic_dev_get_intr_mode(enic->vdev); 318 319 dev_info(enic_get_dev(enic), "vNIC resources used: " 320 "wq %d rq %d cq %d intr %d intr mode %s\n", 321 enic->wq_count, enic->rq_count, 322 enic->cq_count, enic->intr_count, 323 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" : 324 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" : 325 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" : 326 "unknown"); 327 328 /* Allocate queue resources 329 */ 330 331 for (i = 0; i < enic->wq_count; i++) { 332 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i, 333 enic->config.wq_desc_count, 334 sizeof(struct wq_enet_desc)); 335 if (err) 336 goto err_out_cleanup; 337 } 338 339 for (i = 0; i < enic->rq_count; i++) { 340 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i, 341 enic->config.rq_desc_count, 342 sizeof(struct rq_enet_desc)); 343 if (err) 344 goto err_out_cleanup; 345 } 346 347 for (i = 0; i < enic->cq_count; i++) { 348 if (i < enic->rq_count) 349 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i, 350 enic->config.rq_desc_count, 351 sizeof(struct cq_enet_rq_desc)); 352 else 353 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i, 354 enic->config.wq_desc_count, 355 sizeof(struct cq_enet_wq_desc)); 356 if (err) 357 goto err_out_cleanup; 358 } 359 360 for (i = 0; i < enic->intr_count; i++) { 361 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i); 362 if (err) 363 goto err_out_cleanup; 364 } 365 366 /* Hook remaining resource 367 */ 368 369 enic->legacy_pba = vnic_dev_get_res(enic->vdev, 370 RES_TYPE_INTR_PBA_LEGACY, 0); 371 if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) { 372 dev_err(enic_get_dev(enic), 373 "Failed to hook legacy pba resource\n"); 374 err = -ENODEV; 375 goto err_out_cleanup; 376 } 377 378 return 0; 379 380 err_out_cleanup: 381 enic_free_vnic_resources(enic); 382 383 return err; 384 } 385