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 %02x:%02x:%02x:%02x:%02x:%02x "
  94                 "wq/rq %d/%d\n",
  95                 enic->mac_addr[0], enic->mac_addr[1], enic->mac_addr[2],
  96                 enic->mac_addr[3], enic->mac_addr[4], enic->mac_addr[5],
  97                 c->wq_desc_count, c->rq_desc_count);
  98         printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
  99                 "intr timer %d\n",
 100                 c->mtu, ENIC_SETTING(enic, TXCSUM),
 101                 ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
 102                 ENIC_SETTING(enic, LRO), c->intr_timer);
 103
 104         return 0;
 105 }
 106
 107 void enic_add_station_addr(struct enic *enic)
 108 {
 109         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
 110 }
 111
 112 void enic_add_multicast_addr(struct enic *enic, u8 *addr)
 113 {
 114         vnic_dev_add_addr(enic->vdev, addr);
 115 }
 116
 117 void enic_del_multicast_addr(struct enic *enic, u8 *addr)
 118 {
 119         vnic_dev_del_addr(enic->vdev, addr);
 120 }
 121
 122 void 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                 printk(KERN_ERR PFX "Can't add vlan id, %d\n", err);
 131 }
 132
 133 void enic_del_vlan(struct enic *enic, u16 vlanid)
 134 {
 135         u64 a0 = vlanid, a1 = 0;
 136         int wait = 1000;
 137         int err;
 138
 139         err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
 140         if (err)
 141                 printk(KERN_ERR PFX "Can't delete vlan id, %d\n", err);
 142 }
 143
 144 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 145         u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
 146         u8 ig_vlan_strip_en)
 147 {
 148         u64 a0, a1;
 149         u32 nic_cfg;
 150         int wait = 1000;
 151
 152         vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
 153                 rss_hash_type, rss_hash_bits, rss_base_cpu,
 154                 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
 155
 156         a0 = nic_cfg;
 157         a1 = 0;
 158
 159         return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
 160 }
 161
 162 void enic_free_vnic_resources(struct enic *enic)
 163 {
 164         unsigned int i;
 165
 166         for (i = 0; i < enic->wq_count; i++)
 167                 vnic_wq_free(&enic->wq[i]);
 168         for (i = 0; i < enic->rq_count; i++)
 169                 vnic_rq_free(&enic->rq[i]);
 170         for (i = 0; i < enic->cq_count; i++)
 171                 vnic_cq_free(&enic->cq[i]);
 172         for (i = 0; i < enic->intr_count; i++)
 173                 vnic_intr_free(&enic->intr[i]);
 174 }
 175
 176 void enic_get_res_counts(struct enic *enic)
 177 {
 178         enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
 179         enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
 180         enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
 181         enic->intr_count = vnic_dev_get_res_count(enic->vdev,
 182                 RES_TYPE_INTR_CTRL);
 183
 184         printk(KERN_INFO PFX "vNIC resources avail: "
 185                 "wq %d rq %d cq %d intr %d\n",
 186                 enic->wq_count, enic->rq_count,
 187                 enic->cq_count, enic->intr_count);
 188 }
 189
 190 void enic_init_vnic_resources(struct enic *enic)
 191 {
 192         enum vnic_dev_intr_mode intr_mode;
 193         unsigned int mask_on_assertion;
 194         unsigned int interrupt_offset;
 195         unsigned int error_interrupt_enable;
 196         unsigned int error_interrupt_offset;
 197         unsigned int cq_index;
 198         unsigned int i;
 199
 200         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 201
 202         /* Init RQ/WQ resources.
 203          *
 204          * RQ[0 - n-1] point to CQ[0 - n-1]
 205          * WQ[0 - m-1] point to CQ[n - n+m-1]
 206          *
 207          * Error interrupt is not enabled for MSI.
 208          */
 209
 210         switch (intr_mode) {
 211         case VNIC_DEV_INTR_MODE_INTX:
 212         case VNIC_DEV_INTR_MODE_MSIX:
 213                 error_interrupt_enable = 1;
 214                 error_interrupt_offset = enic->intr_count - 2;
 215                 break;
 216         default:
 217                 error_interrupt_enable = 0;
 218                 error_interrupt_offset = 0;
 219                 break;
 220         }
 221
 222         for (i = 0; i < enic->rq_count; i++) {
 223                 cq_index = i;
 224                 vnic_rq_init(&enic->rq[i],
 225                         cq_index,
 226                         error_interrupt_enable,
 227                         error_interrupt_offset);
 228         }
 229
 230         for (i = 0; i < enic->wq_count; i++) {
 231                 cq_index = enic->rq_count + i;
 232                 vnic_wq_init(&enic->wq[i],
 233                         cq_index,
 234                         error_interrupt_enable,
 235                         error_interrupt_offset);
 236         }
 237
 238         /* Init CQ resources
 239          *
 240          * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
 241          * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
 242          */
 243
 244         for (i = 0; i < enic->cq_count; i++) {
 245
 246                 switch (intr_mode) {
 247                 case VNIC_DEV_INTR_MODE_MSIX:
 248                         interrupt_offset = i;
 249                         break;
 250                 default:
 251                         interrupt_offset = 0;
 252                         break;
 253                 }
 254
 255                 vnic_cq_init(&enic->cq[i],
 256                         0 /* flow_control_enable */,
 257                         1 /* color_enable */,
 258                         0 /* cq_head */,
 259                         0 /* cq_tail */,
 260                         1 /* cq_tail_color */,
 261                         1 /* interrupt_enable */,
 262                         1 /* cq_entry_enable */,
 263                         0 /* cq_message_enable */,
 264                         interrupt_offset,
 265                         0 /* cq_message_addr */);
 266         }
 267
 268         /* Init INTR resources
 269          *
 270          * mask_on_assertion is not used for INTx due to the level-
 271          * triggered nature of INTx
 272          */
 273
 274         switch (intr_mode) {
 275         case VNIC_DEV_INTR_MODE_MSI:
 276         case VNIC_DEV_INTR_MODE_MSIX:
 277                 mask_on_assertion = 1;
 278                 break;
 279         default:
 280                 mask_on_assertion = 0;
 281                 break;
 282         }
 283
 284         for (i = 0; i < enic->intr_count; i++) {
 285                 vnic_intr_init(&enic->intr[i],
 286                         enic->config.intr_timer,
 287                         enic->config.intr_timer_type,
 288                         mask_on_assertion);
 289         }
 290
 291         /* Clear LIF stats
 292          */
 293
 294         vnic_dev_stats_clear(enic->vdev);
 295 }
 296
 297 int enic_alloc_vnic_resources(struct enic *enic)
 298 {
 299         enum vnic_dev_intr_mode intr_mode;
 300         unsigned int i;
 301         int err;
 302
 303         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 304
 305         printk(KERN_INFO PFX "vNIC resources used:  "
 306                 "wq %d rq %d cq %d intr %d intr mode %s\n",
 307                 enic->wq_count, enic->rq_count,
 308                 enic->cq_count, enic->intr_count,
 309                 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
 310                 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
 311                 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
 312                 "unknown"
 313                 );
 314
 315         /* Allocate queue resources
 316          */
 317
 318         for (i = 0; i < enic->wq_count; i++) {
 319                 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
 320                         enic->config.wq_desc_count,
 321                         sizeof(struct wq_enet_desc));
 322                 if (err)
 323                         goto err_out_cleanup;
 324         }
 325
 326         for (i = 0; i < enic->rq_count; i++) {
 327                 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
 328                         enic->config.rq_desc_count,
 329                         sizeof(struct rq_enet_desc));
 330                 if (err)
 331                         goto err_out_cleanup;
 332         }
 333
 334         for (i = 0; i < enic->cq_count; i++) {
 335                 if (i < enic->rq_count)
 336                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 337                                 enic->config.rq_desc_count,
 338                                 sizeof(struct cq_enet_rq_desc));
 339                 else
 340                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 341                                 enic->config.wq_desc_count,
 342                                 sizeof(struct cq_enet_wq_desc));
 343                 if (err)
 344                         goto err_out_cleanup;
 345         }
 346
 347         for (i = 0; i < enic->intr_count; i++) {
 348                 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
 349                 if (err)
 350                         goto err_out_cleanup;
 351         }
 352
 353         /* Hook remaining resource
 354          */
 355
 356         enic->legacy_pba = vnic_dev_get_res(enic->vdev,
 357                 RES_TYPE_INTR_PBA_LEGACY, 0);
 358         if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
 359                 printk(KERN_ERR PFX "Failed to hook legacy pba resource\n");
 360                 err = -ENODEV;
 361                 goto err_out_cleanup;
 362         }
 363
 364         return 0;
 365
 366 err_out_cleanup:
 367         enic_free_vnic_resources(enic);
 368
 369         return err;
 370 }