mlx4.c revision 331769
1/* 2 * Copyright (c) 2007 Cisco, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33#include <config.h> 34 35#include <stdio.h> 36#include <stdlib.h> 37#include <unistd.h> 38#include <errno.h> 39#include <sys/mman.h> 40#include <pthread.h> 41#include <string.h> 42 43#include "mlx4.h" 44#include "mlx4-abi.h" 45 46#ifndef PCI_VENDOR_ID_MELLANOX 47#define PCI_VENDOR_ID_MELLANOX 0x15b3 48#endif 49 50#define HCA(v, d) \ 51 { .vendor = PCI_VENDOR_ID_##v, \ 52 .device = d } 53 54static struct { 55 unsigned vendor; 56 unsigned device; 57} hca_table[] = { 58 HCA(MELLANOX, 0x6340), /* MT25408 "Hermon" SDR */ 59 HCA(MELLANOX, 0x634a), /* MT25408 "Hermon" DDR */ 60 HCA(MELLANOX, 0x6354), /* MT25408 "Hermon" QDR */ 61 HCA(MELLANOX, 0x6732), /* MT25408 "Hermon" DDR PCIe gen2 */ 62 HCA(MELLANOX, 0x673c), /* MT25408 "Hermon" QDR PCIe gen2 */ 63 HCA(MELLANOX, 0x6368), /* MT25408 "Hermon" EN 10GigE */ 64 HCA(MELLANOX, 0x6750), /* MT25408 "Hermon" EN 10GigE PCIe gen2 */ 65 HCA(MELLANOX, 0x6372), /* MT25458 ConnectX EN 10GBASE-T 10GigE */ 66 HCA(MELLANOX, 0x675a), /* MT25458 ConnectX EN 10GBASE-T+Gen2 10GigE */ 67 HCA(MELLANOX, 0x6764), /* MT26468 ConnectX EN 10GigE PCIe gen2*/ 68 HCA(MELLANOX, 0x6746), /* MT26438 ConnectX EN 40GigE PCIe gen2 5GT/s */ 69 HCA(MELLANOX, 0x676e), /* MT26478 ConnectX2 40GigE PCIe gen2 */ 70 HCA(MELLANOX, 0x1002), /* MT25400 Family [ConnectX-2 Virtual Function] */ 71 HCA(MELLANOX, 0x1003), /* MT27500 Family [ConnectX-3] */ 72 HCA(MELLANOX, 0x1004), /* MT27500 Family [ConnectX-3 Virtual Function] */ 73 HCA(MELLANOX, 0x1005), /* MT27510 Family */ 74 HCA(MELLANOX, 0x1006), /* MT27511 Family */ 75 HCA(MELLANOX, 0x1007), /* MT27520 Family */ 76 HCA(MELLANOX, 0x1008), /* MT27521 Family */ 77 HCA(MELLANOX, 0x1009), /* MT27530 Family */ 78 HCA(MELLANOX, 0x100a), /* MT27531 Family */ 79 HCA(MELLANOX, 0x100b), /* MT27540 Family */ 80 HCA(MELLANOX, 0x100c), /* MT27541 Family */ 81 HCA(MELLANOX, 0x100d), /* MT27550 Family */ 82 HCA(MELLANOX, 0x100e), /* MT27551 Family */ 83 HCA(MELLANOX, 0x100f), /* MT27560 Family */ 84 HCA(MELLANOX, 0x1010), /* MT27561 Family */ 85}; 86 87static struct ibv_context_ops mlx4_ctx_ops = { 88 .query_device = mlx4_query_device, 89 .query_port = mlx4_query_port, 90 .alloc_pd = mlx4_alloc_pd, 91 .dealloc_pd = mlx4_free_pd, 92 .reg_mr = mlx4_reg_mr, 93 .rereg_mr = mlx4_rereg_mr, 94 .dereg_mr = mlx4_dereg_mr, 95 .alloc_mw = mlx4_alloc_mw, 96 .dealloc_mw = mlx4_dealloc_mw, 97 .bind_mw = mlx4_bind_mw, 98 .create_cq = mlx4_create_cq, 99 .poll_cq = mlx4_poll_cq, 100 .req_notify_cq = mlx4_arm_cq, 101 .cq_event = mlx4_cq_event, 102 .resize_cq = mlx4_resize_cq, 103 .destroy_cq = mlx4_destroy_cq, 104 .create_srq = mlx4_create_srq, 105 .modify_srq = mlx4_modify_srq, 106 .query_srq = mlx4_query_srq, 107 .destroy_srq = mlx4_destroy_srq, 108 .post_srq_recv = mlx4_post_srq_recv, 109 .create_qp = mlx4_create_qp, 110 .query_qp = mlx4_query_qp, 111 .modify_qp = mlx4_modify_qp, 112 .destroy_qp = mlx4_destroy_qp, 113 .post_send = mlx4_post_send, 114 .post_recv = mlx4_post_recv, 115 .create_ah = mlx4_create_ah, 116 .destroy_ah = mlx4_destroy_ah, 117 .attach_mcast = ibv_cmd_attach_mcast, 118 .detach_mcast = ibv_cmd_detach_mcast 119}; 120 121static int mlx4_map_internal_clock(struct mlx4_device *mdev, 122 struct ibv_context *ibv_ctx) 123{ 124 struct mlx4_context *context = to_mctx(ibv_ctx); 125 void *hca_clock_page; 126 127 hca_clock_page = mmap(NULL, mdev->page_size, 128 PROT_READ, MAP_SHARED, ibv_ctx->cmd_fd, 129 mdev->page_size * 3); 130 131 if (hca_clock_page == MAP_FAILED) { 132 fprintf(stderr, PFX 133 "Warning: Timestamp available,\n" 134 "but failed to mmap() hca core clock page.\n"); 135 return -1; 136 } 137 138 context->hca_core_clock = hca_clock_page + 139 (context->core_clock.offset & (mdev->page_size - 1)); 140 return 0; 141} 142 143static int mlx4_init_context(struct verbs_device *v_device, 144 struct ibv_context *ibv_ctx, int cmd_fd) 145{ 146 struct mlx4_context *context; 147 struct ibv_get_context cmd; 148 struct mlx4_alloc_ucontext_resp resp; 149 int i; 150 struct mlx4_alloc_ucontext_resp_v3 resp_v3; 151 __u16 bf_reg_size; 152 struct mlx4_device *dev = to_mdev(&v_device->device); 153 struct verbs_context *verbs_ctx = verbs_get_ctx(ibv_ctx); 154 struct ibv_device_attr_ex dev_attrs; 155 156 /* memory footprint of mlx4_context and verbs_context share 157 * struct ibv_context. 158 */ 159 context = to_mctx(ibv_ctx); 160 ibv_ctx->cmd_fd = cmd_fd; 161 162 if (dev->abi_version <= MLX4_UVERBS_NO_DEV_CAPS_ABI_VERSION) { 163 if (ibv_cmd_get_context(ibv_ctx, &cmd, sizeof cmd, 164 &resp_v3.ibv_resp, sizeof resp_v3)) 165 return errno; 166 167 context->num_qps = resp_v3.qp_tab_size; 168 bf_reg_size = resp_v3.bf_reg_size; 169 context->cqe_size = sizeof (struct mlx4_cqe); 170 } else { 171 if (ibv_cmd_get_context(ibv_ctx, &cmd, sizeof cmd, 172 &resp.ibv_resp, sizeof resp)) 173 return errno; 174 175 context->num_qps = resp.qp_tab_size; 176 bf_reg_size = resp.bf_reg_size; 177 if (resp.dev_caps & MLX4_USER_DEV_CAP_64B_CQE) 178 context->cqe_size = resp.cqe_size; 179 else 180 context->cqe_size = sizeof (struct mlx4_cqe); 181 } 182 183 context->qp_table_shift = ffs(context->num_qps) - 1 - MLX4_QP_TABLE_BITS; 184 context->qp_table_mask = (1 << context->qp_table_shift) - 1; 185 for (i = 0; i < MLX4_PORTS_NUM; ++i) 186 context->port_query_cache[i].valid = 0; 187 188 pthread_mutex_init(&context->qp_table_mutex, NULL); 189 for (i = 0; i < MLX4_QP_TABLE_SIZE; ++i) 190 context->qp_table[i].refcnt = 0; 191 192 for (i = 0; i < MLX4_NUM_DB_TYPE; ++i) 193 context->db_list[i] = NULL; 194 195 mlx4_init_xsrq_table(&context->xsrq_table, context->num_qps); 196 pthread_mutex_init(&context->db_list_mutex, NULL); 197 198 context->uar = mmap(NULL, dev->page_size, PROT_WRITE, 199 MAP_SHARED, cmd_fd, 0); 200 if (context->uar == MAP_FAILED) 201 return errno; 202 203 if (bf_reg_size) { 204 context->bf_page = mmap(NULL, dev->page_size, 205 PROT_WRITE, MAP_SHARED, cmd_fd, 206 dev->page_size); 207 if (context->bf_page == MAP_FAILED) { 208 fprintf(stderr, PFX "Warning: BlueFlame available, " 209 "but failed to mmap() BlueFlame page.\n"); 210 context->bf_page = NULL; 211 context->bf_buf_size = 0; 212 } else { 213 context->bf_buf_size = bf_reg_size / 2; 214 context->bf_offset = 0; 215 pthread_spin_init(&context->bf_lock, PTHREAD_PROCESS_PRIVATE); 216 } 217 } else { 218 context->bf_page = NULL; 219 context->bf_buf_size = 0; 220 } 221 222 pthread_spin_init(&context->uar_lock, PTHREAD_PROCESS_PRIVATE); 223 ibv_ctx->ops = mlx4_ctx_ops; 224 225 context->hca_core_clock = NULL; 226 memset(&dev_attrs, 0, sizeof(dev_attrs)); 227 if (!mlx4_query_device_ex(ibv_ctx, NULL, &dev_attrs, 228 sizeof(struct ibv_device_attr_ex))) { 229 context->max_qp_wr = dev_attrs.orig_attr.max_qp_wr; 230 context->max_sge = dev_attrs.orig_attr.max_sge; 231 if (context->core_clock.offset_valid) 232 mlx4_map_internal_clock(dev, ibv_ctx); 233 } 234 235 verbs_ctx->has_comp_mask = VERBS_CONTEXT_XRCD | VERBS_CONTEXT_SRQ | 236 VERBS_CONTEXT_QP; 237 verbs_set_ctx_op(verbs_ctx, close_xrcd, mlx4_close_xrcd); 238 verbs_set_ctx_op(verbs_ctx, open_xrcd, mlx4_open_xrcd); 239 verbs_set_ctx_op(verbs_ctx, create_srq_ex, mlx4_create_srq_ex); 240 verbs_set_ctx_op(verbs_ctx, get_srq_num, verbs_get_srq_num); 241 verbs_set_ctx_op(verbs_ctx, create_qp_ex, mlx4_create_qp_ex); 242 verbs_set_ctx_op(verbs_ctx, open_qp, mlx4_open_qp); 243 verbs_set_ctx_op(verbs_ctx, ibv_create_flow, ibv_cmd_create_flow); 244 verbs_set_ctx_op(verbs_ctx, ibv_destroy_flow, ibv_cmd_destroy_flow); 245 verbs_set_ctx_op(verbs_ctx, create_cq_ex, mlx4_create_cq_ex); 246 verbs_set_ctx_op(verbs_ctx, query_device_ex, mlx4_query_device_ex); 247 verbs_set_ctx_op(verbs_ctx, query_rt_values, mlx4_query_rt_values); 248 249 return 0; 250 251} 252 253static void mlx4_uninit_context(struct verbs_device *v_device, 254 struct ibv_context *ibv_ctx) 255{ 256 struct mlx4_context *context = to_mctx(ibv_ctx); 257 258 munmap(context->uar, to_mdev(&v_device->device)->page_size); 259 if (context->bf_page) 260 munmap(context->bf_page, to_mdev(&v_device->device)->page_size); 261 if (context->hca_core_clock) 262 munmap(context->hca_core_clock - context->core_clock.offset, 263 to_mdev(&v_device->device)->page_size); 264} 265 266static struct verbs_device_ops mlx4_dev_ops = { 267 .init_context = mlx4_init_context, 268 .uninit_context = mlx4_uninit_context, 269}; 270 271static struct verbs_device *mlx4_driver_init(const char *uverbs_sys_path, int abi_version) 272{ 273 char value[8]; 274 struct mlx4_device *dev; 275 unsigned vendor, device; 276 int i; 277 278 if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor", 279 value, sizeof value) < 0) 280 return NULL; 281 vendor = strtol(value, NULL, 16); 282 283 if (ibv_read_sysfs_file(uverbs_sys_path, "device/device", 284 value, sizeof value) < 0) 285 return NULL; 286 device = strtol(value, NULL, 16); 287 288 for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i) 289 if (vendor == hca_table[i].vendor && 290 device == hca_table[i].device) 291 goto found; 292 293 return NULL; 294 295found: 296 if (abi_version < MLX4_UVERBS_MIN_ABI_VERSION || 297 abi_version > MLX4_UVERBS_MAX_ABI_VERSION) { 298 fprintf(stderr, PFX "Fatal: ABI version %d of %s is not supported " 299 "(min supported %d, max supported %d)\n", 300 abi_version, uverbs_sys_path, 301 MLX4_UVERBS_MIN_ABI_VERSION, 302 MLX4_UVERBS_MAX_ABI_VERSION); 303 return NULL; 304 } 305 306 dev = calloc(1, sizeof *dev); 307 if (!dev) { 308 fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n", 309 uverbs_sys_path); 310 return NULL; 311 } 312 313 dev->page_size = sysconf(_SC_PAGESIZE); 314 dev->abi_version = abi_version; 315 316 dev->verbs_dev.ops = &mlx4_dev_ops; 317 dev->verbs_dev.sz = sizeof(*dev); 318 dev->verbs_dev.size_of_context = 319 sizeof(struct mlx4_context) - sizeof(struct ibv_context); 320 321 return &dev->verbs_dev; 322} 323 324static __attribute__((constructor)) void mlx4_register_driver(void) 325{ 326 verbs_register_driver("mlx4", mlx4_driver_init); 327} 328