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_type);
  70         GET_CONFIG(intr_mode);
  71         GET_CONFIG(intr_timer_usec);
  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 &= 0xffffffe0; /* must be aligned to groups of 32 */
  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 &= 0xffffffe0; /* must be aligned to groups of 32 */
  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_usec = min_t(u32,
  92                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
  93                 c->intr_timer_usec);
  94
  95         printk(KERN_INFO PFX "vNIC MAC addr %pM wq/rq %d/%d\n",
  96                 enic->mac_addr, c->wq_desc_count, c->rq_desc_count);
  97         printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
  98                 "intr timer %d usec\n",
  99                 c->mtu, ENIC_SETTING(enic, TXCSUM),
 100                 ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
 101                 ENIC_SETTING(enic, LRO), c->intr_timer_usec);
 102
 103         return 0;
 104 }
 105
 106 void enic_add_multicast_addr(struct enic *enic, u8 *addr)
 107 {
 108         vnic_dev_add_addr(enic->vdev, addr);
 109 }
 110
 111 void enic_del_multicast_addr(struct enic *enic, u8 *addr)
 112 {
 113         vnic_dev_del_addr(enic->vdev, addr);
 114 }
 115
 116 void enic_add_vlan(struct enic *enic, u16 vlanid)
 117 {
 118         u64 a0 = vlanid, a1 = 0;
 119         int wait = 1000;
 120         int err;
 121
 122         err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
 123         if (err)
 124                 printk(KERN_ERR PFX "Can't add vlan id, %d\n", err);
 125 }
 126
 127 void enic_del_vlan(struct enic *enic, u16 vlanid)
 128 {
 129         u64 a0 = vlanid, a1 = 0;
 130         int wait = 1000;
 131         int err;
 132
 133         err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
 134         if (err)
 135                 printk(KERN_ERR PFX "Can't delete vlan id, %d\n", err);
 136 }
 137
 138 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 139         u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
 140         u8 ig_vlan_strip_en)
 141 {
 142         u64 a0, a1;
 143         u32 nic_cfg;
 144         int wait = 1000;
 145
 146         vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
 147                 rss_hash_type, rss_hash_bits, rss_base_cpu,
 148                 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
 149
 150         a0 = nic_cfg;
 151         a1 = 0;
 152
 153         return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
 154 }
 155
 156 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
 157 {
 158         u64 a0 = (u64)key_pa, a1 = len;
 159         int wait = 1000;
 160
 161         return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
 162 }
 163
 164 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
 165 {
 166         u64 a0 = (u64)cpu_pa, a1 = len;
 167         int wait = 1000;
 168
 169         return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
 170 }
 171
 172 void enic_free_vnic_resources(struct enic *enic)
 173 {
 174         unsigned int i;
 175
 176         for (i = 0; i < enic->wq_count; i++)
 177                 vnic_wq_free(&enic->wq[i]);
 178         for (i = 0; i < enic->rq_count; i++)
 179                 vnic_rq_free(&enic->rq[i]);
 180         for (i = 0; i < enic->cq_count; i++)
 181                 vnic_cq_free(&enic->cq[i]);
 182         for (i = 0; i < enic->intr_count; i++)
 183                 vnic_intr_free(&enic->intr[i]);
 184 }
 185
 186 void enic_get_res_counts(struct enic *enic)
 187 {
 188         enic->wq_count = min_t(int,
 189                 vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ),
 190                 ENIC_WQ_MAX);
 191         enic->rq_count = min_t(int,
 192                 vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ),
 193                 ENIC_RQ_MAX);
 194         enic->cq_count = min_t(int,
 195                 vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ),
 196                 ENIC_CQ_MAX);
 197         enic->intr_count = min_t(int,
 198                 vnic_dev_get_res_count(enic->vdev, RES_TYPE_INTR_CTRL),
 199                 ENIC_INTR_MAX);
 200
 201         printk(KERN_INFO PFX "vNIC resources avail: "
 202                 "wq %d rq %d cq %d intr %d\n",
 203                 enic->wq_count, enic->rq_count,
 204                 enic->cq_count, enic->intr_count);
 205 }
 206
 207 void enic_init_vnic_resources(struct enic *enic)
 208 {
 209         enum vnic_dev_intr_mode intr_mode;
 210         unsigned int mask_on_assertion;
 211         unsigned int interrupt_offset;
 212         unsigned int error_interrupt_enable;
 213         unsigned int error_interrupt_offset;
 214         unsigned int cq_index;
 215         unsigned int i;
 216
 217         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 218
 219         /* Init RQ/WQ resources.
 220          *
 221          * RQ[0 - n-1] point to CQ[0 - n-1]
 222          * WQ[0 - m-1] point to CQ[n - n+m-1]
 223          *
 224          * Error interrupt is not enabled for MSI.
 225          */
 226
 227         switch (intr_mode) {
 228         case VNIC_DEV_INTR_MODE_INTX:
 229         case VNIC_DEV_INTR_MODE_MSIX:
 230                 error_interrupt_enable = 1;
 231                 error_interrupt_offset = enic->intr_count - 2;
 232                 break;
 233         default:
 234                 error_interrupt_enable = 0;
 235                 error_interrupt_offset = 0;
 236                 break;
 237         }
 238
 239         for (i = 0; i < enic->rq_count; i++) {
 240                 cq_index = i;
 241                 vnic_rq_init(&enic->rq[i],
 242                         cq_index,
 243                         error_interrupt_enable,
 244                         error_interrupt_offset);
 245         }
 246
 247         for (i = 0; i < enic->wq_count; i++) {
 248                 cq_index = enic->rq_count + i;
 249                 vnic_wq_init(&enic->wq[i],
 250                         cq_index,
 251                         error_interrupt_enable,
 252                         error_interrupt_offset);
 253         }
 254
 255         /* Init CQ resources
 256          *
 257          * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
 258          * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
 259          */
 260
 261         for (i = 0; i < enic->cq_count; i++) {
 262
 263                 switch (intr_mode) {
 264                 case VNIC_DEV_INTR_MODE_MSIX:
 265                         interrupt_offset = i;
 266                         break;
 267                 default:
 268                         interrupt_offset = 0;
 269                         break;
 270                 }
 271
 272                 vnic_cq_init(&enic->cq[i],
 273                         0 /* flow_control_enable */,
 274                         1 /* color_enable */,
 275                         0 /* cq_head */,
 276                         0 /* cq_tail */,
 277                         1 /* cq_tail_color */,
 278                         1 /* interrupt_enable */,
 279                         1 /* cq_entry_enable */,
 280                         0 /* cq_message_enable */,
 281                         interrupt_offset,
 282                         0 /* cq_message_addr */);
 283         }
 284
 285         /* Init INTR resources
 286          *
 287          * mask_on_assertion is not used for INTx due to the level-
 288          * triggered nature of INTx
 289          */
 290
 291         switch (intr_mode) {
 292         case VNIC_DEV_INTR_MODE_MSI:
 293         case VNIC_DEV_INTR_MODE_MSIX:
 294                 mask_on_assertion = 1;
 295                 break;
 296         default:
 297                 mask_on_assertion = 0;
 298                 break;
 299         }
 300
 301         for (i = 0; i < enic->intr_count; i++) {
 302                 vnic_intr_init(&enic->intr[i],
 303                         INTR_COALESCE_USEC_TO_HW(enic->config.intr_timer_usec),
 304                         enic->config.intr_timer_type,
 305                         mask_on_assertion);
 306         }
 307
 308         /* Clear LIF stats
 309          */
 310
 311         vnic_dev_stats_clear(enic->vdev);
 312 }
 313
 314 int enic_alloc_vnic_resources(struct enic *enic)
 315 {
 316         enum vnic_dev_intr_mode intr_mode;
 317         unsigned int i;
 318         int err;
 319
 320         intr_mode = vnic_dev_get_intr_mode(enic->vdev);
 321
 322         printk(KERN_INFO PFX "vNIC resources used:  "
 323                 "wq %d rq %d cq %d intr %d intr mode %s\n",
 324                 enic->wq_count, enic->rq_count,
 325                 enic->cq_count, enic->intr_count,
 326                 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
 327                 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
 328                 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
 329                 "unknown"
 330                 );
 331
 332         /* Allocate queue resources
 333          */
 334
 335         for (i = 0; i < enic->wq_count; i++) {
 336                 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
 337                         enic->config.wq_desc_count,
 338                         sizeof(struct wq_enet_desc));
 339                 if (err)
 340                         goto err_out_cleanup;
 341         }
 342
 343         for (i = 0; i < enic->rq_count; i++) {
 344                 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
 345                         enic->config.rq_desc_count,
 346                         sizeof(struct rq_enet_desc));
 347                 if (err)
 348                         goto err_out_cleanup;
 349         }
 350
 351         for (i = 0; i < enic->cq_count; i++) {
 352                 if (i < enic->rq_count)
 353                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 354                                 enic->config.rq_desc_count,
 355                                 sizeof(struct cq_enet_rq_desc));
 356                 else
 357                         err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 358                                 enic->config.wq_desc_count,
 359                                 sizeof(struct cq_enet_wq_desc));
 360                 if (err)
 361                         goto err_out_cleanup;
 362         }
 363
 364         for (i = 0; i < enic->intr_count; i++) {
 365                 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
 366                 if (err)
 367                         goto err_out_cleanup;
 368         }
 369
 370         /* Hook remaining resource
 371          */
 372
 373         enic->legacy_pba = vnic_dev_get_res(enic->vdev,
 374                 RES_TYPE_INTR_PBA_LEGACY, 0);
 375         if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
 376                 printk(KERN_ERR PFX "Failed to hook legacy pba resource\n");
 377                 err = -ENODEV;
 378                 goto err_out_cleanup;
 379         }
 380
 381         return 0;
 382
 383 err_out_cleanup:
 384         enic_free_vnic_resources(enic);
 385
 386         return err;
 387 }