drivers/net/ethernet/cisco/enic/enic_res.c

   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_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 }