drivers/net/enic/enic_res.c

   1 /*
   2  * Copyright 2008 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                 printk(KERN_ERR PFX "Error getting MAC addr, %d\n", err);
  50                 return err;
  51         }
  52
  53 #define GET_CONFIG(m) \
  54         do { \
  55                 err = vnic_dev_spec(enic->vdev, \
  56                         offsetof(struct vnic_enet_config, m), \
  57                         sizeof(c->m), &c->m); \
  58                 if (err) { \
  59                         printk(KERN_ERR PFX \
  60                                 "Error getting %s, %d\n", #m, err); \
  61                         return err; \
  62                 } \
  63         } while (0)
  64
  65         GET_CONFIG(flags);
  66         GET_CONFIG(wq_desc_count);
  67         GET_CONFIG(rq_desc_count);
  68         GET_CONFIG(mtu);
  69         GET_CONFIG(intr_timer);
  70         GET_CONFIG(intr_timer_type);
  71         GET_CONFIG(intr_mode);
  72
  73         c->wq_desc_count =
  74                 min_t(u32, ENIC_MAX_WQ_DESCS,
  75                 max_t(u32, ENIC_MIN_WQ_DESCS,
  76                 c->wq_desc_count));
  77         c->wq_desc_count &= 0xfffffff0; /* must be aligned to groups of 16 */
  78
  79         c->rq_desc_count =
  80                 min_t(u32, ENIC_MAX_RQ_DESCS,
  81                 max_t(u32, ENIC_MIN_RQ_DESCS,
  82                 c->rq_desc_count));
  83         c->rq_desc_count &= 0xfffffff0; /* must be aligned to groups of 16 */
  84
  85         if (c->mtu == 0)
  86                 c->mtu = 1500;
  87         c->mtu = min_t(u16, ENIC_MAX_MTU,
  88                 max_t(u16, ENIC_MIN_MTU,
  89                 c->mtu));
  90
  91         c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
  92
  93         printk(KERN_INFO PFX "vNIC MAC addr %pM wq/rq %d/%d\n",
  94                 enic->mac_addr, c->wq_desc_count, c->rq_desc_count);
  95         printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
  96                 "intr timer %d\n",
  97                 c->mtu, ENIC_SETTING(enic, TXCSUM),
  98                 ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
  99                 ENIC_SETTING(enic, LRO), c->intr_timer);
 100
 101         return 0;
 102 }
 103
 104 void enic_add_station_addr(struct enic *enic)
 105 {
 106         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 107 }
 108
 109 void enic_add_multicast_addr(struct enic *enic, u8 *addr)
 110 {
 111         vnic_dev_add_addr(enic->vdev, addr);
 112 }
 113
 114 void enic_del_multicast_addr(struct enic *enic, u8 *addr)
 115 {
 116         vnic_dev_del_addr(enic->vdev, addr);
 117 }
 118
 119 void enic_add_vlan(struct enic *enic, u16 vlanid)
 120 {
 121         u64 a0 = vlanid, a1 = 0;
 122         int wait = 1000;
 123         int err;
 124
 125         err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
 126         if (err)
 127                 printk(KERN_ERR PFX "Can't add vlan id, %d\n", err);
 128 }
 129
 130 void enic_del_vlan(struct enic *enic, u16 vlanid)
 131 {
 132         u64 a0 = vlanid, a1 = 0;
 133         int wait = 1000;
 134         int err;
 135
 136         err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
 137         if (err)
 138                 printk(KERN_ERR PFX "Can't delete vlan id, %d\n", err);
 139 }
 140
 141 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 142         u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
 143         u8 ig_vlan_strip_en)
 144 {
 145         u64 a0, a1;
 146         u32 nic_cfg;
 147         int wait = 1000;
 148
 149         vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
 150                 rss_hash_type, rss_hash_bits, rss_base_cpu,
 151                 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
 152
 153         a0 = nic_cfg;
 154         a1 = 0;
 155
 156         return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
 157 }
 158
 159 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
 160 {
 161         u64 a0 = (u64)key_pa, a1 = len;
 162         int wait = 1000;
 163
 164         return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
 165 }
 166
 167 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
 168 {
 169         u64 a0 = (u64)cpu_pa, a1 = len;
 170         int wait = 1000;
 171
 172         return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
 173 }
 174
 175 void enic_free_vnic_resources(struct enic *enic)
 176 {
 177         unsigned int i;
 178
 179         for (i = 0; i < enic->wq_count; i++)
 180                 vnic_wq_free(&enic->wq[i]);
 181         for (i = 0; i < enic->rq_count; i++)
 182                 vnic_rq_free(&enic->rq[i]);
 183         for (i = 0; i < enic->cq_count; i++)
 184                 vnic_cq_free(&enic->cq[i]);
 185         for (i = 0; i < enic->intr_count; i++)
 186                 vnic_intr_free(&enic->intr[i]);
 187 }
 188
 189 void enic_get_res_counts(struct enic *enic)
 190 {
 191         enic->wq_count = min_t(int,
 192                 vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ),
 193                 ENIC_WQ_MAX);
 194         enic->rq_count = min_t(int,
 195                 vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ),
 196                 ENIC_RQ_MAX);
 197         enic->cq_count = min_t(int,
 198                 vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ),
 199                 ENIC_CQ_MAX);
 200         enic->intr_count = min_t(int,
 201                 vnic_dev_get_res_count(enic->vdev, RES_TYPE_INTR_CTRL),
 202                 ENIC_INTR_MAX);
 203
 204         printk(KERN_INFO PFX "vNIC resources avail: "
 205                 "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                         enic->config.intr_timer,
 307                         enic->config.intr_timer_type,
 308                         mask_on_assertion);
 309         }
 310
 311         /* Clear LIF stats
 312          */
 313
 314         vnic_dev_stats_clear(enic->vdev);
 315 }
 316
 317 int enic_alloc_vnic_resources(struct enic *enic)
 318 {
 319         enum vnic_dev_intr_mode intr_mode;
 320         unsigned int i;
 321         int err;
 322
 323         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 324
 325         printk(KERN_INFO PFX "vNIC resources used:  "
 326                 "wq %d rq %d cq %d intr %d intr mode %s\n",
 327                 enic->wq_count, enic->rq_count,
 328                 enic->cq_count, enic->intr_count,
 329                 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
 330                 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
 331                 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
 332                 "unknown"
 333                 );
 334
 335         /* Allocate queue resources
 336          */
 337
 338         for (i = 0; i < enic->wq_count; i++) {
 339                 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
 340                         enic->config.wq_desc_count,
 341                         sizeof(struct wq_enet_desc));
 342                 if (err)
 343                         goto err_out_cleanup;
 344         }
 345
 346         for (i = 0; i < enic->rq_count; i++) {
 347                 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
 348                         enic->config.rq_desc_count,
 349                         sizeof(struct rq_enet_desc));
 350                 if (err)
 351                         goto err_out_cleanup;
 352         }
 353
 354         for (i = 0; i < enic->cq_count; i++) {
 355                 if (i < enic->rq_count)
 356                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 357                                 enic->config.rq_desc_count,
 358                                 sizeof(struct cq_enet_rq_desc));
 359                 else
 360                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 361                                 enic->config.wq_desc_count,
 362                                 sizeof(struct cq_enet_wq_desc));
 363                 if (err)
 364                         goto err_out_cleanup;
 365         }
 366
 367         for (i = 0; i < enic->intr_count; i++) {
 368                 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
 369                 if (err)
 370                         goto err_out_cleanup;
 371         }
 372
 373         /* Hook remaining resource
 374          */
 375
 376         enic->legacy_pba = vnic_dev_get_res(enic->vdev,
 377                 RES_TYPE_INTR_PBA_LEGACY, 0);
 378         if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
 379                 printk(KERN_ERR PFX "Failed to hook legacy pba resource\n");
 380                 err = -ENODEV;
 381                 goto err_out_cleanup;
 382         }
 383
 384         return 0;
 385
 386 err_out_cleanup:
 387         enic_free_vnic_resources(enic);
 388
 389         return err;
 390 }