drivers/net/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,
  94                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
  95                 c->intr_timer_usec);
  96
  97         dev_info(enic_get_dev(enic),
  98                 "vNIC MAC addr %pM wq/rq %d/%d mtu %d\n",
  99                 enic->mac_addr, c->wq_desc_count, c->rq_desc_count, c->mtu);
 100
 101         dev_info(enic_get_dev(enic), "vNIC csum tx/rx %s/%s "
 102                 "tso/lro %s/%s rss %s intr mode %s type %s timer %d usec "
 103                 "loopback tag 0x%04x\n",
 104                 ENIC_SETTING(enic, TXCSUM) ? "yes" : "no",
 105                 ENIC_SETTING(enic, RXCSUM) ? "yes" : "no",
 106                 ENIC_SETTING(enic, TSO) ? "yes" : "no",
 107                 ENIC_SETTING(enic, LRO) ? "yes" : "no",
 108                 ENIC_SETTING(enic, RSS) ? "yes" : "no",
 109                 c->intr_mode == VENET_INTR_MODE_INTX ? "INTx" :
 110                 c->intr_mode == VENET_INTR_MODE_MSI ? "MSI" :
 111                 c->intr_mode == VENET_INTR_MODE_ANY ? "any" :
 112                 "unknown",
 113                 c->intr_timer_type == VENET_INTR_TYPE_MIN ? "min" :
 114                 c->intr_timer_type == VENET_INTR_TYPE_IDLE ? "idle" :
 115                 "unknown",
 116                 c->intr_timer_usec,
 117                 c->loop_tag);
 118
 119         return 0;
 120 }
 121
 122 int enic_add_vlan(struct enic *enic, u16 vlanid)
 123 {
 124         u64 a0 = vlanid, a1 = 0;
 125         int wait = 1000;
 126         int err;
 127
 128         err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
 129         if (err)
 130                 dev_err(enic_get_dev(enic), "Can't add vlan id, %d\n", err);
 131
 132         return err;
 133 }
 134
 135 int enic_del_vlan(struct enic *enic, u16 vlanid)
 136 {
 137         u64 a0 = vlanid, a1 = 0;
 138         int wait = 1000;
 139         int err;
 140
 141         err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
 142         if (err)
 143                 dev_err(enic_get_dev(enic), "Can't delete vlan id, %d\n", err);
 144
 145         return err;
 146 }
 147
 148 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 149         u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
 150         u8 ig_vlan_strip_en)
 151 {
 152         u64 a0, a1;
 153         u32 nic_cfg;
 154         int wait = 1000;
 155
 156         vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
 157                 rss_hash_type, rss_hash_bits, rss_base_cpu,
 158                 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
 159
 160         a0 = nic_cfg;
 161         a1 = 0;
 162
 163         return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
 164 }
 165
 166 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
 167 {
 168         u64 a0 = (u64)key_pa, a1 = len;
 169         int wait = 1000;
 170
 171         return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
 172 }
 173
 174 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
 175 {
 176         u64 a0 = (u64)cpu_pa, a1 = len;
 177         int wait = 1000;
 178
 179         return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
 180 }
 181
 182 void enic_free_vnic_resources(struct enic *enic)
 183 {
 184         unsigned int i;
 185
 186         for (i = 0; i < enic->wq_count; i++)
 187                 vnic_wq_free(&enic->wq[i]);
 188         for (i = 0; i < enic->rq_count; i++)
 189                 vnic_rq_free(&enic->rq[i]);
 190         for (i = 0; i < enic->cq_count; i++)
 191                 vnic_cq_free(&enic->cq[i]);
 192         for (i = 0; i < enic->intr_count; i++)
 193                 vnic_intr_free(&enic->intr[i]);
 194 }
 195
 196 void enic_get_res_counts(struct enic *enic)
 197 {
 198         enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
 199         enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
 200         enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
 201         enic->intr_count = vnic_dev_get_res_count(enic->vdev,
 202                 RES_TYPE_INTR_CTRL);
 203
 204         dev_info(enic_get_dev(enic),
 205                 "vNIC resources avail: wq %d rq %d cq %d intr %d\n",
 206                 enic->wq_count, enic->rq_count,
 207                 enic->cq_count, enic->intr_count);
 208 }
 209
 210 void enic_init_vnic_resources(struct enic *enic)
 211 {
 212         enum vnic_dev_intr_mode intr_mode;
 213         unsigned int mask_on_assertion;
 214         unsigned int interrupt_offset;
 215         unsigned int error_interrupt_enable;
 216         unsigned int error_interrupt_offset;
 217         unsigned int cq_index;
 218         unsigned int i;
 219
 220         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 221
 222         /* Init RQ/WQ resources.
 223          *
 224          * RQ[0 - n-1] point to CQ[0 - n-1]
 225          * WQ[0 - m-1] point to CQ[n - n+m-1]
 226          *
 227          * Error interrupt is not enabled for MSI.
 228          */
 229
 230         switch (intr_mode) {
 231         case VNIC_DEV_INTR_MODE_INTX:
 232         case VNIC_DEV_INTR_MODE_MSIX:
 233                 error_interrupt_enable = 1;
 234                 error_interrupt_offset = enic->intr_count - 2;
 235                 break;
 236         default:
 237                 error_interrupt_enable = 0;
 238                 error_interrupt_offset = 0;
 239                 break;
 240         }
 241
 242         for (i = 0; i < enic->rq_count; i++) {
 243                 cq_index = i;
 244                 vnic_rq_init(&enic->rq[i],
 245                         cq_index,
 246                         error_interrupt_enable,
 247                         error_interrupt_offset);
 248         }
 249
 250         for (i = 0; i < enic->wq_count; i++) {
 251                 cq_index = enic->rq_count + i;
 252                 vnic_wq_init(&enic->wq[i],
 253                         cq_index,
 254                         error_interrupt_enable,
 255                         error_interrupt_offset);
 256         }
 257
 258         /* Init CQ resources
 259          *
 260          * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
 261          * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
 262          */
 263
 264         for (i = 0; i < enic->cq_count; i++) {
 265
 266                 switch (intr_mode) {
 267                 case VNIC_DEV_INTR_MODE_MSIX:
 268                         interrupt_offset = i;
 269                         break;
 270                 default:
 271                         interrupt_offset = 0;
 272                         break;
 273                 }
 274
 275                 vnic_cq_init(&enic->cq[i],
 276                         0 /* flow_control_enable */,
 277                         1 /* color_enable */,
 278                         0 /* cq_head */,
 279                         0 /* cq_tail */,
 280                         1 /* cq_tail_color */,
 281                         1 /* interrupt_enable */,
 282                         1 /* cq_entry_enable */,
 283                         0 /* cq_message_enable */,
 284                         interrupt_offset,
 285                         0 /* cq_message_addr */);
 286         }
 287
 288         /* Init INTR resources
 289          *
 290          * mask_on_assertion is not used for INTx due to the level-
 291          * triggered nature of INTx
 292          */
 293
 294         switch (intr_mode) {
 295         case VNIC_DEV_INTR_MODE_MSI:
 296         case VNIC_DEV_INTR_MODE_MSIX:
 297                 mask_on_assertion = 1;
 298                 break;
 299         default:
 300                 mask_on_assertion = 0;
 301                 break;
 302         }
 303
 304         for (i = 0; i < enic->intr_count; i++) {
 305                 vnic_intr_init(&enic->intr[i],
 306                         INTR_COALESCE_USEC_TO_HW(enic->config.intr_timer_usec),
 307                         enic->config.intr_timer_type,
 308                         mask_on_assertion);
 309         }
 310 }
 311
 312 int enic_alloc_vnic_resources(struct enic *enic)
 313 {
 314         enum vnic_dev_intr_mode intr_mode;
 315         unsigned int i;
 316         int err;
 317
 318         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 319
 320         dev_info(enic_get_dev(enic), "vNIC resources used:  "
 321                 "wq %d rq %d cq %d intr %d intr mode %s\n",
 322                 enic->wq_count, enic->rq_count,
 323                 enic->cq_count, enic->intr_count,
 324                 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
 325                 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
 326                 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
 327                 "unknown");
 328
 329         /* Allocate queue resources
 330          */
 331
 332         for (i = 0; i < enic->wq_count; i++) {
 333                 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
 334                         enic->config.wq_desc_count,
 335                         sizeof(struct wq_enet_desc));
 336                 if (err)
 337                         goto err_out_cleanup;
 338         }
 339
 340         for (i = 0; i < enic->rq_count; i++) {
 341                 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
 342                         enic->config.rq_desc_count,
 343                         sizeof(struct rq_enet_desc));
 344                 if (err)
 345                         goto err_out_cleanup;
 346         }
 347
 348         for (i = 0; i < enic->cq_count; i++) {
 349                 if (i < enic->rq_count)
 350                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 351                                 enic->config.rq_desc_count,
 352                                 sizeof(struct cq_enet_rq_desc));
 353                 else
 354                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 355                                 enic->config.wq_desc_count,
 356                                 sizeof(struct cq_enet_wq_desc));
 357                 if (err)
 358                         goto err_out_cleanup;
 359         }
 360
 361         for (i = 0; i < enic->intr_count; i++) {
 362                 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
 363                 if (err)
 364                         goto err_out_cleanup;
 365         }
 366
 367         /* Hook remaining resource
 368          */
 369
 370         enic->legacy_pba = vnic_dev_get_res(enic->vdev,
 371                 RES_TYPE_INTR_PBA_LEGACY, 0);
 372         if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
 373                 dev_err(enic_get_dev(enic),
 374                         "Failed to hook legacy pba resource\n");
 375                 err = -ENODEV;
 376                 goto err_out_cleanup;
 377         }
 378
 379         return 0;
 380
 381 err_out_cleanup:
 382         enic_free_vnic_resources(enic);
 383
 384         return err;
 385 }