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 void enic_free_vnic_resources(struct enic *enic)
 160 {
 161         unsigned int i;
 162
 163         for (i = 0; i < enic->wq_count; i++)
 164                 vnic_wq_free(&enic->wq[i]);
 165         for (i = 0; i < enic->rq_count; i++)
 166                 vnic_rq_free(&enic->rq[i]);
 167         for (i = 0; i < enic->cq_count; i++)
 168                 vnic_cq_free(&enic->cq[i]);
 169         for (i = 0; i < enic->intr_count; i++)
 170                 vnic_intr_free(&enic->intr[i]);
 171 }
 172
 173 void enic_get_res_counts(struct enic *enic)
 174 {
 175         enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
 176         enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
 177         enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
 178         enic->intr_count = vnic_dev_get_res_count(enic->vdev,
 179                 RES_TYPE_INTR_CTRL);
 180
 181         printk(KERN_INFO PFX "vNIC resources avail: "
 182                 "wq %d rq %d cq %d intr %d\n",
 183                 enic->wq_count, enic->rq_count,
 184                 enic->cq_count, enic->intr_count);
 185 }
 186
 187 void enic_init_vnic_resources(struct enic *enic)
 188 {
 189         enum vnic_dev_intr_mode intr_mode;
 190         unsigned int mask_on_assertion;
 191         unsigned int interrupt_offset;
 192         unsigned int error_interrupt_enable;
 193         unsigned int error_interrupt_offset;
 194         unsigned int cq_index;
 195         unsigned int i;
 196
 197         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 198
 199         /* Init RQ/WQ resources.
 200          *
 201          * RQ[0 - n-1] point to CQ[0 - n-1]
 202          * WQ[0 - m-1] point to CQ[n - n+m-1]
 203          *
 204          * Error interrupt is not enabled for MSI.
 205          */
 206
 207         switch (intr_mode) {
 208         case VNIC_DEV_INTR_MODE_INTX:
 209         case VNIC_DEV_INTR_MODE_MSIX:
 210                 error_interrupt_enable = 1;
 211                 error_interrupt_offset = enic->intr_count - 2;
 212                 break;
 213         default:
 214                 error_interrupt_enable = 0;
 215                 error_interrupt_offset = 0;
 216                 break;
 217         }
 218
 219         for (i = 0; i < enic->rq_count; i++) {
 220                 cq_index = i;
 221                 vnic_rq_init(&enic->rq[i],
 222                         cq_index,
 223                         error_interrupt_enable,
 224                         error_interrupt_offset);
 225         }
 226
 227         for (i = 0; i < enic->wq_count; i++) {
 228                 cq_index = enic->rq_count + i;
 229                 vnic_wq_init(&enic->wq[i],
 230                         cq_index,
 231                         error_interrupt_enable,
 232                         error_interrupt_offset);
 233         }
 234
 235         /* Init CQ resources
 236          *
 237          * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
 238          * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
 239          */
 240
 241         for (i = 0; i < enic->cq_count; i++) {
 242
 243                 switch (intr_mode) {
 244                 case VNIC_DEV_INTR_MODE_MSIX:
 245                         interrupt_offset = i;
 246                         break;
 247                 default:
 248                         interrupt_offset = 0;
 249                         break;
 250                 }
 251
 252                 vnic_cq_init(&enic->cq[i],
 253                         0 /* flow_control_enable */,
 254                         1 /* color_enable */,
 255                         0 /* cq_head */,
 256                         0 /* cq_tail */,
 257                         1 /* cq_tail_color */,
 258                         1 /* interrupt_enable */,
 259                         1 /* cq_entry_enable */,
 260                         0 /* cq_message_enable */,
 261                         interrupt_offset,
 262                         0 /* cq_message_addr */);
 263         }
 264
 265         /* Init INTR resources
 266          *
 267          * mask_on_assertion is not used for INTx due to the level-
 268          * triggered nature of INTx
 269          */
 270
 271         switch (intr_mode) {
 272         case VNIC_DEV_INTR_MODE_MSI:
 273         case VNIC_DEV_INTR_MODE_MSIX:
 274                 mask_on_assertion = 1;
 275                 break;
 276         default:
 277                 mask_on_assertion = 0;
 278                 break;
 279         }
 280
 281         for (i = 0; i < enic->intr_count; i++) {
 282                 vnic_intr_init(&enic->intr[i],
 283                         enic->config.intr_timer,
 284                         enic->config.intr_timer_type,
 285                         mask_on_assertion);
 286         }
 287
 288         /* Clear LIF stats
 289          */
 290
 291         vnic_dev_stats_clear(enic->vdev);
 292 }
 293
 294 int enic_alloc_vnic_resources(struct enic *enic)
 295 {
 296         enum vnic_dev_intr_mode intr_mode;
 297         unsigned int i;
 298         int err;
 299
 300         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 301
 302         printk(KERN_INFO PFX "vNIC resources used:  "
 303                 "wq %d rq %d cq %d intr %d intr mode %s\n",
 304                 enic->wq_count, enic->rq_count,
 305                 enic->cq_count, enic->intr_count,
 306                 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
 307                 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
 308                 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
 309                 "unknown"
 310                 );
 311
 312         /* Allocate queue resources
 313          */
 314
 315         for (i = 0; i < enic->wq_count; i++) {
 316                 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
 317                         enic->config.wq_desc_count,
 318                         sizeof(struct wq_enet_desc));
 319                 if (err)
 320                         goto err_out_cleanup;
 321         }
 322
 323         for (i = 0; i < enic->rq_count; i++) {
 324                 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
 325                         enic->config.rq_desc_count,
 326                         sizeof(struct rq_enet_desc));
 327                 if (err)
 328                         goto err_out_cleanup;
 329         }
 330
 331         for (i = 0; i < enic->cq_count; i++) {
 332                 if (i < enic->rq_count)
 333                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 334                                 enic->config.rq_desc_count,
 335                                 sizeof(struct cq_enet_rq_desc));
 336                 else
 337                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 338                                 enic->config.wq_desc_count,
 339                                 sizeof(struct cq_enet_wq_desc));
 340                 if (err)
 341                         goto err_out_cleanup;
 342         }
 343
 344         for (i = 0; i < enic->intr_count; i++) {
 345                 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
 346                 if (err)
 347                         goto err_out_cleanup;
 348         }
 349
 350         /* Hook remaining resource
 351          */
 352
 353         enic->legacy_pba = vnic_dev_get_res(enic->vdev,
 354                 RES_TYPE_INTR_PBA_LEGACY, 0);
 355         if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
 356                 printk(KERN_ERR PFX "Failed to hook legacy pba resource\n");
 357                 err = -ENODEV;
 358                 goto err_out_cleanup;
 359         }
 360
 361         return 0;
 362
 363 err_out_cleanup:
 364         enic_free_vnic_resources(enic);
 365
 366         return err;
 367 }