Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the Chelsio FCoE driver for Linux. |
| 3 | * |
| 4 | * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved. |
| 5 | * |
| 6 | * This software is available to you under a choice of one of two |
| 7 | * licenses. You may choose to be licensed under the terms of the GNU |
| 8 | * General Public License (GPL) Version 2, available from the file |
| 9 | * COPYING in the main directory of this source tree, or the |
| 10 | * OpenIB.org BSD license below: |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or |
| 13 | * without modification, are permitted provided that the following |
| 14 | * conditions are met: |
| 15 | * |
| 16 | * - Redistributions of source code must retain the above |
| 17 | * copyright notice, this list of conditions and the following |
| 18 | * disclaimer. |
| 19 | * |
| 20 | * - Redistributions in binary form must reproduce the above |
| 21 | * copyright notice, this list of conditions and the following |
| 22 | * disclaimer in the documentation and/or other materials |
| 23 | * provided with the distribution. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 32 | * SOFTWARE. |
| 33 | */ |
| 34 | |
| 35 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 36 | |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/module.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/pci.h> |
| 41 | #include <linux/aer.h> |
| 42 | #include <linux/mm.h> |
| 43 | #include <linux/notifier.h> |
| 44 | #include <linux/kdebug.h> |
| 45 | #include <linux/seq_file.h> |
| 46 | #include <linux/debugfs.h> |
| 47 | #include <linux/string.h> |
| 48 | #include <linux/export.h> |
| 49 | |
| 50 | #include "csio_init.h" |
| 51 | #include "csio_defs.h" |
| 52 | |
| 53 | #define CSIO_MIN_MEMPOOL_SZ 64 |
| 54 | |
| 55 | static struct dentry *csio_debugfs_root; |
| 56 | |
| 57 | static struct scsi_transport_template *csio_fcoe_transport; |
| 58 | static struct scsi_transport_template *csio_fcoe_transport_vport; |
| 59 | |
| 60 | /* |
| 61 | * debugfs support |
| 62 | */ |
| 63 | static int |
| 64 | csio_mem_open(struct inode *inode, struct file *file) |
| 65 | { |
| 66 | file->private_data = inode->i_private; |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | static ssize_t |
| 71 | csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
| 72 | { |
| 73 | loff_t pos = *ppos; |
| 74 | loff_t avail = file->f_path.dentry->d_inode->i_size; |
| 75 | unsigned int mem = (uintptr_t)file->private_data & 3; |
| 76 | struct csio_hw *hw = file->private_data - mem; |
| 77 | |
| 78 | if (pos < 0) |
| 79 | return -EINVAL; |
| 80 | if (pos >= avail) |
| 81 | return 0; |
| 82 | if (count > avail - pos) |
| 83 | count = avail - pos; |
| 84 | |
| 85 | while (count) { |
| 86 | size_t len; |
| 87 | int ret, ofst; |
| 88 | __be32 data[16]; |
| 89 | |
| 90 | if (mem == MEM_MC) |
| 91 | ret = csio_hw_mc_read(hw, pos, data, NULL); |
| 92 | else |
| 93 | ret = csio_hw_edc_read(hw, mem, pos, data, NULL); |
| 94 | if (ret) |
| 95 | return ret; |
| 96 | |
| 97 | ofst = pos % sizeof(data); |
| 98 | len = min(count, sizeof(data) - ofst); |
| 99 | if (copy_to_user(buf, (u8 *)data + ofst, len)) |
| 100 | return -EFAULT; |
| 101 | |
| 102 | buf += len; |
| 103 | pos += len; |
| 104 | count -= len; |
| 105 | } |
| 106 | count = pos - *ppos; |
| 107 | *ppos = pos; |
| 108 | return count; |
| 109 | } |
| 110 | |
| 111 | static const struct file_operations csio_mem_debugfs_fops = { |
| 112 | .owner = THIS_MODULE, |
| 113 | .open = csio_mem_open, |
| 114 | .read = csio_mem_read, |
| 115 | .llseek = default_llseek, |
| 116 | }; |
| 117 | |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame^] | 118 | static void csio_add_debugfs_mem(struct csio_hw *hw, const char *name, |
| 119 | unsigned int idx, unsigned int size_mb) |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 120 | { |
| 121 | struct dentry *de; |
| 122 | |
| 123 | de = debugfs_create_file(name, S_IRUSR, hw->debugfs_root, |
| 124 | (void *)hw + idx, &csio_mem_debugfs_fops); |
| 125 | if (de && de->d_inode) |
| 126 | de->d_inode->i_size = size_mb << 20; |
| 127 | } |
| 128 | |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame^] | 129 | static int csio_setup_debugfs(struct csio_hw *hw) |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 130 | { |
| 131 | int i; |
| 132 | |
| 133 | if (IS_ERR_OR_NULL(hw->debugfs_root)) |
| 134 | return -1; |
| 135 | |
| 136 | i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE); |
| 137 | if (i & EDRAM0_ENABLE) |
| 138 | csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5); |
| 139 | if (i & EDRAM1_ENABLE) |
| 140 | csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5); |
| 141 | if (i & EXT_MEM_ENABLE) |
| 142 | csio_add_debugfs_mem(hw, "mc", MEM_MC, |
| 143 | EXT_MEM_SIZE_GET(csio_rd_reg32(hw, MA_EXT_MEMORY_BAR))); |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | * csio_dfs_create - Creates and sets up per-hw debugfs. |
| 149 | * |
| 150 | */ |
| 151 | static int |
| 152 | csio_dfs_create(struct csio_hw *hw) |
| 153 | { |
| 154 | if (csio_debugfs_root) { |
| 155 | hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev), |
| 156 | csio_debugfs_root); |
| 157 | csio_setup_debugfs(hw); |
| 158 | } |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * csio_dfs_destroy - Destroys per-hw debugfs. |
| 165 | */ |
| 166 | static int |
| 167 | csio_dfs_destroy(struct csio_hw *hw) |
| 168 | { |
| 169 | if (hw->debugfs_root) |
| 170 | debugfs_remove_recursive(hw->debugfs_root); |
| 171 | |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * csio_dfs_init - Debug filesystem initialization for the module. |
| 177 | * |
| 178 | */ |
| 179 | static int |
| 180 | csio_dfs_init(void) |
| 181 | { |
| 182 | csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); |
| 183 | if (!csio_debugfs_root) |
| 184 | pr_warn("Could not create debugfs entry, continuing\n"); |
| 185 | |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * csio_dfs_exit - debugfs cleanup for the module. |
| 191 | */ |
| 192 | static void |
| 193 | csio_dfs_exit(void) |
| 194 | { |
| 195 | debugfs_remove(csio_debugfs_root); |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * csio_pci_init - PCI initialization. |
| 200 | * @pdev: PCI device. |
| 201 | * @bars: Bitmask of bars to be requested. |
| 202 | * |
| 203 | * Initializes the PCI function by enabling MMIO, setting bus |
| 204 | * mastership and setting DMA mask. |
| 205 | */ |
| 206 | static int |
| 207 | csio_pci_init(struct pci_dev *pdev, int *bars) |
| 208 | { |
| 209 | int rv = -ENODEV; |
| 210 | |
| 211 | *bars = pci_select_bars(pdev, IORESOURCE_MEM); |
| 212 | |
| 213 | if (pci_enable_device_mem(pdev)) |
| 214 | goto err; |
| 215 | |
| 216 | if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) |
| 217 | goto err_disable_device; |
| 218 | |
| 219 | pci_set_master(pdev); |
| 220 | pci_try_set_mwi(pdev); |
| 221 | |
| 222 | if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { |
| 223 | pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
| 224 | } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { |
| 225 | pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 226 | } else { |
| 227 | dev_err(&pdev->dev, "No suitable DMA available.\n"); |
| 228 | goto err_release_regions; |
| 229 | } |
| 230 | |
| 231 | return 0; |
| 232 | |
| 233 | err_release_regions: |
| 234 | pci_release_selected_regions(pdev, *bars); |
| 235 | err_disable_device: |
| 236 | pci_disable_device(pdev); |
| 237 | err: |
| 238 | return rv; |
| 239 | |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * csio_pci_exit - PCI unitialization. |
| 244 | * @pdev: PCI device. |
| 245 | * @bars: Bars to be released. |
| 246 | * |
| 247 | */ |
| 248 | static void |
| 249 | csio_pci_exit(struct pci_dev *pdev, int *bars) |
| 250 | { |
| 251 | pci_release_selected_regions(pdev, *bars); |
| 252 | pci_disable_device(pdev); |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * csio_hw_init_workers - Initialize the HW module's worker threads. |
| 257 | * @hw: HW module. |
| 258 | * |
| 259 | */ |
| 260 | static void |
| 261 | csio_hw_init_workers(struct csio_hw *hw) |
| 262 | { |
| 263 | INIT_WORK(&hw->evtq_work, csio_evtq_worker); |
| 264 | } |
| 265 | |
| 266 | static void |
| 267 | csio_hw_exit_workers(struct csio_hw *hw) |
| 268 | { |
| 269 | cancel_work_sync(&hw->evtq_work); |
| 270 | flush_scheduled_work(); |
| 271 | } |
| 272 | |
| 273 | static int |
| 274 | csio_create_queues(struct csio_hw *hw) |
| 275 | { |
| 276 | int i, j; |
| 277 | struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); |
| 278 | int rv; |
| 279 | struct csio_scsi_cpu_info *info; |
| 280 | |
| 281 | if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) |
| 282 | return 0; |
| 283 | |
| 284 | if (hw->intr_mode != CSIO_IM_MSIX) { |
| 285 | rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, |
| 286 | 0, hw->pport[0].portid, false, NULL); |
| 287 | if (rv != 0) { |
| 288 | csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); |
| 289 | return rv; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | /* FW event queue */ |
| 294 | rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, |
| 295 | csio_get_fwevt_intr_idx(hw), |
| 296 | hw->pport[0].portid, true, NULL); |
| 297 | if (rv != 0) { |
| 298 | csio_err(hw, "FW event IQ config failed!: %d\n", rv); |
| 299 | return rv; |
| 300 | } |
| 301 | |
| 302 | /* Create mgmt queue */ |
| 303 | rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, |
| 304 | mgmtm->iq_idx, hw->pport[0].portid, NULL); |
| 305 | |
| 306 | if (rv != 0) { |
| 307 | csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); |
| 308 | goto err; |
| 309 | } |
| 310 | |
| 311 | /* Create SCSI queues */ |
| 312 | for (i = 0; i < hw->num_pports; i++) { |
| 313 | info = &hw->scsi_cpu_info[i]; |
| 314 | |
| 315 | for (j = 0; j < info->max_cpus; j++) { |
| 316 | struct csio_scsi_qset *sqset = &hw->sqset[i][j]; |
| 317 | |
| 318 | rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, |
| 319 | sqset->intr_idx, i, false, NULL); |
| 320 | if (rv != 0) { |
| 321 | csio_err(hw, |
| 322 | "SCSI module IQ config failed [%d][%d]:%d\n", |
| 323 | i, j, rv); |
| 324 | goto err; |
| 325 | } |
| 326 | rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, |
| 327 | sqset->iq_idx, i, NULL); |
| 328 | if (rv != 0) { |
| 329 | csio_err(hw, |
| 330 | "SCSI module EQ config failed [%d][%d]:%d\n", |
| 331 | i, j, rv); |
| 332 | goto err; |
| 333 | } |
| 334 | } /* for all CPUs */ |
| 335 | } /* For all ports */ |
| 336 | |
| 337 | hw->flags |= CSIO_HWF_Q_FW_ALLOCED; |
| 338 | return 0; |
| 339 | err: |
| 340 | csio_wr_destroy_queues(hw, true); |
| 341 | return -EINVAL; |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * csio_config_queues - Configure the DMA queues. |
| 346 | * @hw: HW module. |
| 347 | * |
| 348 | * Allocates memory for queues are registers them with FW. |
| 349 | */ |
| 350 | int |
| 351 | csio_config_queues(struct csio_hw *hw) |
| 352 | { |
| 353 | int i, j, idx, k = 0; |
| 354 | int rv; |
| 355 | struct csio_scsi_qset *sqset; |
| 356 | struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); |
| 357 | struct csio_scsi_qset *orig; |
| 358 | struct csio_scsi_cpu_info *info; |
| 359 | |
| 360 | if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) |
| 361 | return csio_create_queues(hw); |
| 362 | |
| 363 | /* Calculate number of SCSI queues for MSIX we would like */ |
| 364 | hw->num_scsi_msix_cpus = num_online_cpus(); |
| 365 | hw->num_sqsets = num_online_cpus() * hw->num_pports; |
| 366 | |
| 367 | if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { |
| 368 | hw->num_sqsets = CSIO_MAX_SCSI_QSETS; |
| 369 | hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; |
| 370 | } |
| 371 | |
| 372 | /* Initialize max_cpus, may get reduced during msix allocations */ |
| 373 | for (i = 0; i < hw->num_pports; i++) |
| 374 | hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; |
| 375 | |
| 376 | csio_dbg(hw, "nsqsets:%d scpus:%d\n", |
| 377 | hw->num_sqsets, hw->num_scsi_msix_cpus); |
| 378 | |
| 379 | csio_intr_enable(hw); |
| 380 | |
| 381 | if (hw->intr_mode != CSIO_IM_MSIX) { |
| 382 | |
| 383 | /* Allocate Forward interrupt iq. */ |
| 384 | hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, |
| 385 | CSIO_INTR_WRSIZE, CSIO_INGRESS, |
| 386 | (void *)hw, 0, 0, NULL); |
| 387 | if (hw->intr_iq_idx == -1) { |
| 388 | csio_err(hw, |
| 389 | "Forward interrupt queue creation failed\n"); |
| 390 | goto intr_disable; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | /* Allocate the FW evt queue */ |
| 395 | hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, |
| 396 | CSIO_FWEVT_WRSIZE, |
| 397 | CSIO_INGRESS, (void *)hw, |
| 398 | CSIO_FWEVT_FLBUFS, 0, |
| 399 | csio_fwevt_intx_handler); |
| 400 | if (hw->fwevt_iq_idx == -1) { |
| 401 | csio_err(hw, "FW evt queue creation failed\n"); |
| 402 | goto intr_disable; |
| 403 | } |
| 404 | |
| 405 | /* Allocate the mgmt queue */ |
| 406 | mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, |
| 407 | CSIO_MGMT_EQ_WRSIZE, |
| 408 | CSIO_EGRESS, (void *)hw, 0, 0, NULL); |
| 409 | if (mgmtm->eq_idx == -1) { |
| 410 | csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); |
| 411 | goto intr_disable; |
| 412 | } |
| 413 | |
| 414 | /* Use FW IQ for MGMT req completion */ |
| 415 | mgmtm->iq_idx = hw->fwevt_iq_idx; |
| 416 | |
| 417 | /* Allocate SCSI queues */ |
| 418 | for (i = 0; i < hw->num_pports; i++) { |
| 419 | info = &hw->scsi_cpu_info[i]; |
| 420 | |
| 421 | for (j = 0; j < hw->num_scsi_msix_cpus; j++) { |
| 422 | sqset = &hw->sqset[i][j]; |
| 423 | |
| 424 | if (j >= info->max_cpus) { |
| 425 | k = j % info->max_cpus; |
| 426 | orig = &hw->sqset[i][k]; |
| 427 | sqset->eq_idx = orig->eq_idx; |
| 428 | sqset->iq_idx = orig->iq_idx; |
| 429 | continue; |
| 430 | } |
| 431 | |
| 432 | idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, |
| 433 | CSIO_EGRESS, (void *)hw, 0, 0, |
| 434 | NULL); |
| 435 | if (idx == -1) { |
| 436 | csio_err(hw, "EQ creation failed for idx:%d\n", |
| 437 | idx); |
| 438 | goto intr_disable; |
| 439 | } |
| 440 | |
| 441 | sqset->eq_idx = idx; |
| 442 | |
| 443 | idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, |
| 444 | CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, |
| 445 | (void *)hw, 0, 0, |
| 446 | csio_scsi_intx_handler); |
| 447 | if (idx == -1) { |
| 448 | csio_err(hw, "IQ creation failed for idx:%d\n", |
| 449 | idx); |
| 450 | goto intr_disable; |
| 451 | } |
| 452 | sqset->iq_idx = idx; |
| 453 | } /* for all CPUs */ |
| 454 | } /* For all ports */ |
| 455 | |
| 456 | hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; |
| 457 | |
| 458 | rv = csio_create_queues(hw); |
| 459 | if (rv != 0) |
| 460 | goto intr_disable; |
| 461 | |
| 462 | /* |
| 463 | * Now request IRQs for the vectors. In the event of a failure, |
| 464 | * cleanup is handled internally by this function. |
| 465 | */ |
| 466 | rv = csio_request_irqs(hw); |
| 467 | if (rv != 0) |
| 468 | return -EINVAL; |
| 469 | |
| 470 | return 0; |
| 471 | |
| 472 | intr_disable: |
| 473 | csio_intr_disable(hw, false); |
| 474 | |
| 475 | return -EINVAL; |
| 476 | } |
| 477 | |
| 478 | static int |
| 479 | csio_resource_alloc(struct csio_hw *hw) |
| 480 | { |
| 481 | struct csio_wrm *wrm = csio_hw_to_wrm(hw); |
| 482 | int rv = -ENOMEM; |
| 483 | |
| 484 | wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + |
| 485 | CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); |
| 486 | |
| 487 | hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, |
| 488 | sizeof(struct csio_mb)); |
| 489 | if (!hw->mb_mempool) |
| 490 | goto err; |
| 491 | |
| 492 | hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, |
| 493 | sizeof(struct csio_rnode)); |
| 494 | if (!hw->rnode_mempool) |
| 495 | goto err_free_mb_mempool; |
| 496 | |
| 497 | hw->scsi_pci_pool = pci_pool_create("csio_scsi_pci_pool", hw->pdev, |
| 498 | CSIO_SCSI_RSP_LEN, 8, 0); |
| 499 | if (!hw->scsi_pci_pool) |
| 500 | goto err_free_rn_pool; |
| 501 | |
| 502 | return 0; |
| 503 | |
| 504 | err_free_rn_pool: |
| 505 | mempool_destroy(hw->rnode_mempool); |
| 506 | hw->rnode_mempool = NULL; |
| 507 | err_free_mb_mempool: |
| 508 | mempool_destroy(hw->mb_mempool); |
| 509 | hw->mb_mempool = NULL; |
| 510 | err: |
| 511 | return rv; |
| 512 | } |
| 513 | |
| 514 | static void |
| 515 | csio_resource_free(struct csio_hw *hw) |
| 516 | { |
| 517 | pci_pool_destroy(hw->scsi_pci_pool); |
| 518 | hw->scsi_pci_pool = NULL; |
| 519 | mempool_destroy(hw->rnode_mempool); |
| 520 | hw->rnode_mempool = NULL; |
| 521 | mempool_destroy(hw->mb_mempool); |
| 522 | hw->mb_mempool = NULL; |
| 523 | } |
| 524 | |
| 525 | /* |
| 526 | * csio_hw_alloc - Allocate and initialize the HW module. |
| 527 | * @pdev: PCI device. |
| 528 | * |
| 529 | * Allocates HW structure, DMA, memory resources, maps BARS to |
| 530 | * host memory and initializes HW module. |
| 531 | */ |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame^] | 532 | static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 533 | { |
| 534 | struct csio_hw *hw; |
| 535 | |
| 536 | hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); |
| 537 | if (!hw) |
| 538 | goto err; |
| 539 | |
| 540 | hw->pdev = pdev; |
| 541 | strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); |
| 542 | |
| 543 | /* memory pool/DMA pool allocation */ |
| 544 | if (csio_resource_alloc(hw)) |
| 545 | goto err_free_hw; |
| 546 | |
| 547 | /* Get the start address of registers from BAR 0 */ |
| 548 | hw->regstart = ioremap_nocache(pci_resource_start(pdev, 0), |
| 549 | pci_resource_len(pdev, 0)); |
| 550 | if (!hw->regstart) { |
| 551 | csio_err(hw, "Could not map BAR 0, regstart = %p\n", |
| 552 | hw->regstart); |
| 553 | goto err_resource_free; |
| 554 | } |
| 555 | |
| 556 | csio_hw_init_workers(hw); |
| 557 | |
| 558 | if (csio_hw_init(hw)) |
| 559 | goto err_unmap_bar; |
| 560 | |
| 561 | csio_dfs_create(hw); |
| 562 | |
| 563 | csio_dbg(hw, "hw:%p\n", hw); |
| 564 | |
| 565 | return hw; |
| 566 | |
| 567 | err_unmap_bar: |
| 568 | csio_hw_exit_workers(hw); |
| 569 | iounmap(hw->regstart); |
| 570 | err_resource_free: |
| 571 | csio_resource_free(hw); |
| 572 | err_free_hw: |
| 573 | kfree(hw); |
| 574 | err: |
| 575 | return NULL; |
| 576 | } |
| 577 | |
| 578 | /* |
| 579 | * csio_hw_free - Uninitialize and free the HW module. |
| 580 | * @hw: The HW module |
| 581 | * |
| 582 | * Disable interrupts, uninit the HW module, free resources, free hw. |
| 583 | */ |
| 584 | static void |
| 585 | csio_hw_free(struct csio_hw *hw) |
| 586 | { |
| 587 | csio_intr_disable(hw, true); |
| 588 | csio_hw_exit_workers(hw); |
| 589 | csio_hw_exit(hw); |
| 590 | iounmap(hw->regstart); |
| 591 | csio_dfs_destroy(hw); |
| 592 | csio_resource_free(hw); |
| 593 | kfree(hw); |
| 594 | } |
| 595 | |
| 596 | /** |
| 597 | * csio_shost_init - Create and initialize the lnode module. |
| 598 | * @hw: The HW module. |
| 599 | * @dev: The device associated with this invocation. |
| 600 | * @probe: Called from probe context or not? |
| 601 | * @os_pln: Parent lnode if any. |
| 602 | * |
| 603 | * Allocates lnode structure via scsi_host_alloc, initializes |
| 604 | * shost, initializes lnode module and registers with SCSI ML |
| 605 | * via scsi_host_add. This function is shared between physical and |
| 606 | * virtual node ports. |
| 607 | */ |
| 608 | struct csio_lnode * |
| 609 | csio_shost_init(struct csio_hw *hw, struct device *dev, |
| 610 | bool probe, struct csio_lnode *pln) |
| 611 | { |
| 612 | struct Scsi_Host *shost = NULL; |
| 613 | struct csio_lnode *ln; |
| 614 | |
| 615 | csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; |
| 616 | csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; |
| 617 | |
| 618 | /* |
| 619 | * hw->pdev is the physical port's PCI dev structure, |
| 620 | * which will be different from the NPIV dev structure. |
| 621 | */ |
| 622 | if (dev == &hw->pdev->dev) |
| 623 | shost = scsi_host_alloc( |
| 624 | &csio_fcoe_shost_template, |
| 625 | sizeof(struct csio_lnode)); |
| 626 | else |
| 627 | shost = scsi_host_alloc( |
| 628 | &csio_fcoe_shost_vport_template, |
| 629 | sizeof(struct csio_lnode)); |
| 630 | |
| 631 | if (!shost) |
| 632 | goto err; |
| 633 | |
| 634 | ln = shost_priv(shost); |
| 635 | memset(ln, 0, sizeof(struct csio_lnode)); |
| 636 | |
| 637 | /* Link common lnode to this lnode */ |
| 638 | ln->dev_num = (shost->host_no << 16); |
| 639 | |
| 640 | shost->can_queue = CSIO_MAX_QUEUE; |
| 641 | shost->this_id = -1; |
| 642 | shost->unique_id = shost->host_no; |
| 643 | shost->max_cmd_len = 16; /* Max CDB length supported */ |
| 644 | shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, |
| 645 | hw->fres_info.max_ssns); |
| 646 | shost->max_lun = CSIO_MAX_LUN; |
| 647 | if (dev == &hw->pdev->dev) |
| 648 | shost->transportt = csio_fcoe_transport; |
| 649 | else |
| 650 | shost->transportt = csio_fcoe_transport_vport; |
| 651 | |
| 652 | /* root lnode */ |
| 653 | if (!hw->rln) |
| 654 | hw->rln = ln; |
| 655 | |
| 656 | /* Other initialization here: Common, Transport specific */ |
| 657 | if (csio_lnode_init(ln, hw, pln)) |
| 658 | goto err_shost_put; |
| 659 | |
| 660 | if (scsi_add_host(shost, dev)) |
| 661 | goto err_lnode_exit; |
| 662 | |
| 663 | return ln; |
| 664 | |
| 665 | err_lnode_exit: |
| 666 | csio_lnode_exit(ln); |
| 667 | err_shost_put: |
| 668 | scsi_host_put(shost); |
| 669 | err: |
| 670 | return NULL; |
| 671 | } |
| 672 | |
| 673 | /** |
| 674 | * csio_shost_exit - De-instantiate the shost. |
| 675 | * @ln: The lnode module corresponding to the shost. |
| 676 | * |
| 677 | */ |
| 678 | void |
| 679 | csio_shost_exit(struct csio_lnode *ln) |
| 680 | { |
| 681 | struct Scsi_Host *shost = csio_ln_to_shost(ln); |
| 682 | struct csio_hw *hw = csio_lnode_to_hw(ln); |
| 683 | |
| 684 | /* Inform transport */ |
| 685 | fc_remove_host(shost); |
| 686 | |
| 687 | /* Inform SCSI ML */ |
| 688 | scsi_remove_host(shost); |
| 689 | |
| 690 | /* Flush all the events, so that any rnode removal events |
| 691 | * already queued are all handled, before we remove the lnode. |
| 692 | */ |
| 693 | spin_lock_irq(&hw->lock); |
| 694 | csio_evtq_flush(hw); |
| 695 | spin_unlock_irq(&hw->lock); |
| 696 | |
| 697 | csio_lnode_exit(ln); |
| 698 | scsi_host_put(shost); |
| 699 | } |
| 700 | |
| 701 | struct csio_lnode * |
| 702 | csio_lnode_alloc(struct csio_hw *hw) |
| 703 | { |
| 704 | return csio_shost_init(hw, &hw->pdev->dev, false, NULL); |
| 705 | } |
| 706 | |
| 707 | void |
| 708 | csio_lnodes_block_request(struct csio_hw *hw) |
| 709 | { |
| 710 | struct Scsi_Host *shost; |
| 711 | struct csio_lnode *sln; |
| 712 | struct csio_lnode *ln; |
| 713 | struct list_head *cur_ln, *cur_cln; |
| 714 | struct csio_lnode **lnode_list; |
| 715 | int cur_cnt = 0, ii; |
| 716 | |
| 717 | lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), |
| 718 | GFP_KERNEL); |
| 719 | if (!lnode_list) { |
| 720 | csio_err(hw, "Failed to allocate lnodes_list"); |
| 721 | return; |
| 722 | } |
| 723 | |
| 724 | spin_lock_irq(&hw->lock); |
| 725 | /* Traverse sibling lnodes */ |
| 726 | list_for_each(cur_ln, &hw->sln_head) { |
| 727 | sln = (struct csio_lnode *) cur_ln; |
| 728 | lnode_list[cur_cnt++] = sln; |
| 729 | |
| 730 | /* Traverse children lnodes */ |
| 731 | list_for_each(cur_cln, &sln->cln_head) |
| 732 | lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; |
| 733 | } |
| 734 | spin_unlock_irq(&hw->lock); |
| 735 | |
| 736 | for (ii = 0; ii < cur_cnt; ii++) { |
| 737 | csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); |
| 738 | ln = lnode_list[ii]; |
| 739 | shost = csio_ln_to_shost(ln); |
| 740 | scsi_block_requests(shost); |
| 741 | |
| 742 | } |
| 743 | kfree(lnode_list); |
| 744 | } |
| 745 | |
| 746 | void |
| 747 | csio_lnodes_unblock_request(struct csio_hw *hw) |
| 748 | { |
| 749 | struct csio_lnode *ln; |
| 750 | struct Scsi_Host *shost; |
| 751 | struct csio_lnode *sln; |
| 752 | struct list_head *cur_ln, *cur_cln; |
| 753 | struct csio_lnode **lnode_list; |
| 754 | int cur_cnt = 0, ii; |
| 755 | |
| 756 | lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), |
| 757 | GFP_KERNEL); |
| 758 | if (!lnode_list) { |
| 759 | csio_err(hw, "Failed to allocate lnodes_list"); |
| 760 | return; |
| 761 | } |
| 762 | |
| 763 | spin_lock_irq(&hw->lock); |
| 764 | /* Traverse sibling lnodes */ |
| 765 | list_for_each(cur_ln, &hw->sln_head) { |
| 766 | sln = (struct csio_lnode *) cur_ln; |
| 767 | lnode_list[cur_cnt++] = sln; |
| 768 | |
| 769 | /* Traverse children lnodes */ |
| 770 | list_for_each(cur_cln, &sln->cln_head) |
| 771 | lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; |
| 772 | } |
| 773 | spin_unlock_irq(&hw->lock); |
| 774 | |
| 775 | for (ii = 0; ii < cur_cnt; ii++) { |
| 776 | csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); |
| 777 | ln = lnode_list[ii]; |
| 778 | shost = csio_ln_to_shost(ln); |
| 779 | scsi_unblock_requests(shost); |
| 780 | } |
| 781 | kfree(lnode_list); |
| 782 | } |
| 783 | |
| 784 | void |
| 785 | csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) |
| 786 | { |
| 787 | struct csio_lnode *ln; |
| 788 | struct Scsi_Host *shost; |
| 789 | struct csio_lnode *sln; |
| 790 | struct list_head *cur_ln, *cur_cln; |
| 791 | struct csio_lnode **lnode_list; |
| 792 | int cur_cnt = 0, ii; |
| 793 | |
| 794 | lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), |
| 795 | GFP_KERNEL); |
| 796 | if (!lnode_list) { |
| 797 | csio_err(hw, "Failed to allocate lnodes_list"); |
| 798 | return; |
| 799 | } |
| 800 | |
| 801 | spin_lock_irq(&hw->lock); |
| 802 | /* Traverse sibling lnodes */ |
| 803 | list_for_each(cur_ln, &hw->sln_head) { |
| 804 | sln = (struct csio_lnode *) cur_ln; |
| 805 | if (sln->portid != portid) |
| 806 | continue; |
| 807 | |
| 808 | lnode_list[cur_cnt++] = sln; |
| 809 | |
| 810 | /* Traverse children lnodes */ |
| 811 | list_for_each(cur_cln, &sln->cln_head) |
| 812 | lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; |
| 813 | } |
| 814 | spin_unlock_irq(&hw->lock); |
| 815 | |
| 816 | for (ii = 0; ii < cur_cnt; ii++) { |
| 817 | csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); |
| 818 | ln = lnode_list[ii]; |
| 819 | shost = csio_ln_to_shost(ln); |
| 820 | scsi_block_requests(shost); |
| 821 | } |
| 822 | kfree(lnode_list); |
| 823 | } |
| 824 | |
| 825 | void |
| 826 | csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) |
| 827 | { |
| 828 | struct csio_lnode *ln; |
| 829 | struct Scsi_Host *shost; |
| 830 | struct csio_lnode *sln; |
| 831 | struct list_head *cur_ln, *cur_cln; |
| 832 | struct csio_lnode **lnode_list; |
| 833 | int cur_cnt = 0, ii; |
| 834 | |
| 835 | lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), |
| 836 | GFP_KERNEL); |
| 837 | if (!lnode_list) { |
| 838 | csio_err(hw, "Failed to allocate lnodes_list"); |
| 839 | return; |
| 840 | } |
| 841 | |
| 842 | spin_lock_irq(&hw->lock); |
| 843 | /* Traverse sibling lnodes */ |
| 844 | list_for_each(cur_ln, &hw->sln_head) { |
| 845 | sln = (struct csio_lnode *) cur_ln; |
| 846 | if (sln->portid != portid) |
| 847 | continue; |
| 848 | lnode_list[cur_cnt++] = sln; |
| 849 | |
| 850 | /* Traverse children lnodes */ |
| 851 | list_for_each(cur_cln, &sln->cln_head) |
| 852 | lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; |
| 853 | } |
| 854 | spin_unlock_irq(&hw->lock); |
| 855 | |
| 856 | for (ii = 0; ii < cur_cnt; ii++) { |
| 857 | csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); |
| 858 | ln = lnode_list[ii]; |
| 859 | shost = csio_ln_to_shost(ln); |
| 860 | scsi_unblock_requests(shost); |
| 861 | } |
| 862 | kfree(lnode_list); |
| 863 | } |
| 864 | |
| 865 | void |
| 866 | csio_lnodes_exit(struct csio_hw *hw, bool npiv) |
| 867 | { |
| 868 | struct csio_lnode *sln; |
| 869 | struct csio_lnode *ln; |
| 870 | struct list_head *cur_ln, *cur_cln; |
| 871 | struct csio_lnode **lnode_list; |
| 872 | int cur_cnt = 0, ii; |
| 873 | |
| 874 | lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), |
| 875 | GFP_KERNEL); |
| 876 | if (!lnode_list) { |
| 877 | csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); |
| 878 | return; |
| 879 | } |
| 880 | |
| 881 | /* Get all child lnodes(NPIV ports) */ |
| 882 | spin_lock_irq(&hw->lock); |
| 883 | list_for_each(cur_ln, &hw->sln_head) { |
| 884 | sln = (struct csio_lnode *) cur_ln; |
| 885 | |
| 886 | /* Traverse children lnodes */ |
| 887 | list_for_each(cur_cln, &sln->cln_head) |
| 888 | lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; |
| 889 | } |
| 890 | spin_unlock_irq(&hw->lock); |
| 891 | |
| 892 | /* Delete NPIV lnodes */ |
| 893 | for (ii = 0; ii < cur_cnt; ii++) { |
| 894 | csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); |
| 895 | ln = lnode_list[ii]; |
| 896 | fc_vport_terminate(ln->fc_vport); |
| 897 | } |
| 898 | |
| 899 | /* Delete only npiv lnodes */ |
| 900 | if (npiv) |
| 901 | goto free_lnodes; |
| 902 | |
| 903 | cur_cnt = 0; |
| 904 | /* Get all physical lnodes */ |
| 905 | spin_lock_irq(&hw->lock); |
| 906 | /* Traverse sibling lnodes */ |
| 907 | list_for_each(cur_ln, &hw->sln_head) { |
| 908 | sln = (struct csio_lnode *) cur_ln; |
| 909 | lnode_list[cur_cnt++] = sln; |
| 910 | } |
| 911 | spin_unlock_irq(&hw->lock); |
| 912 | |
| 913 | /* Delete physical lnodes */ |
| 914 | for (ii = 0; ii < cur_cnt; ii++) { |
| 915 | csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); |
| 916 | csio_shost_exit(lnode_list[ii]); |
| 917 | } |
| 918 | |
| 919 | free_lnodes: |
| 920 | kfree(lnode_list); |
| 921 | } |
| 922 | |
| 923 | /* |
| 924 | * csio_lnode_init_post: Set lnode attributes after starting HW. |
| 925 | * @ln: lnode. |
| 926 | * |
| 927 | */ |
| 928 | static void |
| 929 | csio_lnode_init_post(struct csio_lnode *ln) |
| 930 | { |
| 931 | struct Scsi_Host *shost = csio_ln_to_shost(ln); |
| 932 | |
| 933 | csio_fchost_attr_init(ln); |
| 934 | |
| 935 | scsi_scan_host(shost); |
| 936 | } |
| 937 | |
| 938 | /* |
| 939 | * csio_probe_one - Instantiate this function. |
| 940 | * @pdev: PCI device |
| 941 | * @id: Device ID |
| 942 | * |
| 943 | * This is the .probe() callback of the driver. This function: |
| 944 | * - Initializes the PCI function by enabling MMIO, setting bus |
| 945 | * mastership and setting DMA mask. |
| 946 | * - Allocates HW structure, DMA, memory resources, maps BARS to |
| 947 | * host memory and initializes HW module. |
| 948 | * - Allocates lnode structure via scsi_host_alloc, initializes |
| 949 | * shost, initialized lnode module and registers with SCSI ML |
| 950 | * via scsi_host_add. |
| 951 | * - Enables interrupts, and starts the chip by kicking off the |
| 952 | * HW state machine. |
| 953 | * - Once hardware is ready, initiated scan of the host via |
| 954 | * scsi_scan_host. |
| 955 | */ |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame^] | 956 | static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 957 | { |
| 958 | int rv; |
| 959 | int bars; |
| 960 | int i; |
| 961 | struct csio_hw *hw; |
| 962 | struct csio_lnode *ln; |
| 963 | |
| 964 | rv = csio_pci_init(pdev, &bars); |
| 965 | if (rv) |
| 966 | goto err; |
| 967 | |
| 968 | hw = csio_hw_alloc(pdev); |
| 969 | if (!hw) { |
| 970 | rv = -ENODEV; |
| 971 | goto err_pci_exit; |
| 972 | } |
| 973 | |
| 974 | pci_set_drvdata(pdev, hw); |
| 975 | |
| 976 | if (csio_hw_start(hw) != 0) { |
| 977 | dev_err(&pdev->dev, |
| 978 | "Failed to start FW, continuing in debug mode.\n"); |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", |
| 983 | FW_HDR_FW_VER_MAJOR_GET(hw->fwrev), |
| 984 | FW_HDR_FW_VER_MINOR_GET(hw->fwrev), |
| 985 | FW_HDR_FW_VER_MICRO_GET(hw->fwrev), |
| 986 | FW_HDR_FW_VER_BUILD_GET(hw->fwrev)); |
| 987 | |
| 988 | for (i = 0; i < hw->num_pports; i++) { |
| 989 | ln = csio_shost_init(hw, &pdev->dev, true, NULL); |
| 990 | if (!ln) { |
| 991 | rv = -ENODEV; |
| 992 | break; |
| 993 | } |
| 994 | /* Initialize portid */ |
| 995 | ln->portid = hw->pport[i].portid; |
| 996 | |
| 997 | spin_lock_irq(&hw->lock); |
| 998 | if (csio_lnode_start(ln) != 0) |
| 999 | rv = -ENODEV; |
| 1000 | spin_unlock_irq(&hw->lock); |
| 1001 | |
| 1002 | if (rv) |
| 1003 | break; |
| 1004 | |
| 1005 | csio_lnode_init_post(ln); |
| 1006 | } |
| 1007 | |
| 1008 | if (rv) |
| 1009 | goto err_lnode_exit; |
| 1010 | |
| 1011 | return 0; |
| 1012 | |
| 1013 | err_lnode_exit: |
| 1014 | csio_lnodes_block_request(hw); |
| 1015 | spin_lock_irq(&hw->lock); |
| 1016 | csio_hw_stop(hw); |
| 1017 | spin_unlock_irq(&hw->lock); |
| 1018 | csio_lnodes_unblock_request(hw); |
| 1019 | pci_set_drvdata(hw->pdev, NULL); |
| 1020 | csio_lnodes_exit(hw, 0); |
| 1021 | csio_hw_free(hw); |
| 1022 | err_pci_exit: |
| 1023 | csio_pci_exit(pdev, &bars); |
| 1024 | err: |
| 1025 | dev_err(&pdev->dev, "probe of device failed: %d\n", rv); |
| 1026 | return rv; |
| 1027 | } |
| 1028 | |
| 1029 | /* |
| 1030 | * csio_remove_one - Remove one instance of the driver at this PCI function. |
| 1031 | * @pdev: PCI device |
| 1032 | * |
| 1033 | * Used during hotplug operation. |
| 1034 | */ |
Greg Kroah-Hartman | 6f03979 | 2012-12-21 13:08:55 -0800 | [diff] [blame^] | 1035 | static void csio_remove_one(struct pci_dev *pdev) |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 1036 | { |
| 1037 | struct csio_hw *hw = pci_get_drvdata(pdev); |
| 1038 | int bars = pci_select_bars(pdev, IORESOURCE_MEM); |
| 1039 | |
| 1040 | csio_lnodes_block_request(hw); |
| 1041 | spin_lock_irq(&hw->lock); |
| 1042 | |
| 1043 | /* Stops lnode, Rnode s/m |
| 1044 | * Quiesce IOs. |
| 1045 | * All sessions with remote ports are unregistered. |
| 1046 | */ |
| 1047 | csio_hw_stop(hw); |
| 1048 | spin_unlock_irq(&hw->lock); |
| 1049 | csio_lnodes_unblock_request(hw); |
| 1050 | |
| 1051 | csio_lnodes_exit(hw, 0); |
| 1052 | csio_hw_free(hw); |
| 1053 | pci_set_drvdata(pdev, NULL); |
| 1054 | csio_pci_exit(pdev, &bars); |
| 1055 | } |
| 1056 | |
| 1057 | /* |
| 1058 | * csio_pci_error_detected - PCI error was detected |
| 1059 | * @pdev: PCI device |
| 1060 | * |
| 1061 | */ |
| 1062 | static pci_ers_result_t |
| 1063 | csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) |
| 1064 | { |
| 1065 | struct csio_hw *hw = pci_get_drvdata(pdev); |
| 1066 | |
| 1067 | csio_lnodes_block_request(hw); |
| 1068 | spin_lock_irq(&hw->lock); |
| 1069 | |
| 1070 | /* Post PCI error detected evt to HW s/m |
| 1071 | * HW s/m handles this evt by quiescing IOs, unregisters rports |
| 1072 | * and finally takes the device to offline. |
| 1073 | */ |
| 1074 | csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); |
| 1075 | spin_unlock_irq(&hw->lock); |
| 1076 | csio_lnodes_unblock_request(hw); |
| 1077 | csio_lnodes_exit(hw, 0); |
| 1078 | csio_intr_disable(hw, true); |
| 1079 | pci_disable_device(pdev); |
| 1080 | return state == pci_channel_io_perm_failure ? |
| 1081 | PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; |
| 1082 | } |
| 1083 | |
| 1084 | /* |
| 1085 | * csio_pci_slot_reset - PCI slot has been reset. |
| 1086 | * @pdev: PCI device |
| 1087 | * |
| 1088 | */ |
| 1089 | static pci_ers_result_t |
| 1090 | csio_pci_slot_reset(struct pci_dev *pdev) |
| 1091 | { |
| 1092 | struct csio_hw *hw = pci_get_drvdata(pdev); |
| 1093 | int ready; |
| 1094 | |
| 1095 | if (pci_enable_device(pdev)) { |
| 1096 | dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); |
| 1097 | return PCI_ERS_RESULT_DISCONNECT; |
| 1098 | } |
| 1099 | |
| 1100 | pci_set_master(pdev); |
| 1101 | pci_restore_state(pdev); |
| 1102 | pci_save_state(pdev); |
| 1103 | pci_cleanup_aer_uncorrect_error_status(pdev); |
| 1104 | |
| 1105 | /* Bring HW s/m to ready state. |
| 1106 | * but don't resume IOs. |
| 1107 | */ |
| 1108 | spin_lock_irq(&hw->lock); |
| 1109 | csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); |
| 1110 | ready = csio_is_hw_ready(hw); |
| 1111 | spin_unlock_irq(&hw->lock); |
| 1112 | |
| 1113 | if (ready) { |
| 1114 | return PCI_ERS_RESULT_RECOVERED; |
| 1115 | } else { |
| 1116 | dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); |
| 1117 | return PCI_ERS_RESULT_DISCONNECT; |
| 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | /* |
| 1122 | * csio_pci_resume - Resume normal operations |
| 1123 | * @pdev: PCI device |
| 1124 | * |
| 1125 | */ |
| 1126 | static void |
| 1127 | csio_pci_resume(struct pci_dev *pdev) |
| 1128 | { |
| 1129 | struct csio_hw *hw = pci_get_drvdata(pdev); |
| 1130 | struct csio_lnode *ln; |
| 1131 | int rv = 0; |
| 1132 | int i; |
| 1133 | |
| 1134 | /* Bring the LINK UP and Resume IO */ |
| 1135 | |
| 1136 | for (i = 0; i < hw->num_pports; i++) { |
| 1137 | ln = csio_shost_init(hw, &pdev->dev, true, NULL); |
| 1138 | if (!ln) { |
| 1139 | rv = -ENODEV; |
| 1140 | break; |
| 1141 | } |
| 1142 | /* Initialize portid */ |
| 1143 | ln->portid = hw->pport[i].portid; |
| 1144 | |
| 1145 | spin_lock_irq(&hw->lock); |
| 1146 | if (csio_lnode_start(ln) != 0) |
| 1147 | rv = -ENODEV; |
| 1148 | spin_unlock_irq(&hw->lock); |
| 1149 | |
| 1150 | if (rv) |
| 1151 | break; |
| 1152 | |
| 1153 | csio_lnode_init_post(ln); |
| 1154 | } |
| 1155 | |
| 1156 | if (rv) |
| 1157 | goto err_resume_exit; |
| 1158 | |
| 1159 | return; |
| 1160 | |
| 1161 | err_resume_exit: |
| 1162 | csio_lnodes_block_request(hw); |
| 1163 | spin_lock_irq(&hw->lock); |
| 1164 | csio_hw_stop(hw); |
| 1165 | spin_unlock_irq(&hw->lock); |
| 1166 | csio_lnodes_unblock_request(hw); |
| 1167 | csio_lnodes_exit(hw, 0); |
| 1168 | csio_hw_free(hw); |
| 1169 | dev_err(&pdev->dev, "resume of device failed: %d\n", rv); |
| 1170 | } |
| 1171 | |
| 1172 | static struct pci_error_handlers csio_err_handler = { |
| 1173 | .error_detected = csio_pci_error_detected, |
| 1174 | .slot_reset = csio_pci_slot_reset, |
| 1175 | .resume = csio_pci_resume, |
| 1176 | }; |
| 1177 | |
| 1178 | static DEFINE_PCI_DEVICE_TABLE(csio_pci_tbl) = { |
| 1179 | CSIO_DEVICE(CSIO_DEVID_T440DBG_FCOE, 0), /* T440DBG FCOE */ |
| 1180 | CSIO_DEVICE(CSIO_DEVID_T420CR_FCOE, 0), /* T420CR FCOE */ |
| 1181 | CSIO_DEVICE(CSIO_DEVID_T422CR_FCOE, 0), /* T422CR FCOE */ |
| 1182 | CSIO_DEVICE(CSIO_DEVID_T440CR_FCOE, 0), /* T440CR FCOE */ |
| 1183 | CSIO_DEVICE(CSIO_DEVID_T420BCH_FCOE, 0), /* T420BCH FCOE */ |
| 1184 | CSIO_DEVICE(CSIO_DEVID_T440BCH_FCOE, 0), /* T440BCH FCOE */ |
| 1185 | CSIO_DEVICE(CSIO_DEVID_T440CH_FCOE, 0), /* T440CH FCOE */ |
| 1186 | CSIO_DEVICE(CSIO_DEVID_T420SO_FCOE, 0), /* T420SO FCOE */ |
| 1187 | CSIO_DEVICE(CSIO_DEVID_T420CX_FCOE, 0), /* T420CX FCOE */ |
| 1188 | CSIO_DEVICE(CSIO_DEVID_T420BT_FCOE, 0), /* T420BT FCOE */ |
| 1189 | CSIO_DEVICE(CSIO_DEVID_T404BT_FCOE, 0), /* T404BT FCOE */ |
| 1190 | CSIO_DEVICE(CSIO_DEVID_B420_FCOE, 0), /* B420 FCOE */ |
| 1191 | CSIO_DEVICE(CSIO_DEVID_B404_FCOE, 0), /* B404 FCOE */ |
| 1192 | CSIO_DEVICE(CSIO_DEVID_T480CR_FCOE, 0), /* T480 CR FCOE */ |
| 1193 | CSIO_DEVICE(CSIO_DEVID_T440LPCR_FCOE, 0), /* T440 LP-CR FCOE */ |
| 1194 | CSIO_DEVICE(CSIO_DEVID_PE10K, 0), /* PE10K FCOE */ |
| 1195 | CSIO_DEVICE(CSIO_DEVID_PE10K_PF1, 0), /* PE10K FCOE on PF1 */ |
| 1196 | { 0, 0, 0, 0, 0, 0, 0 } |
| 1197 | }; |
| 1198 | |
| 1199 | |
| 1200 | static struct pci_driver csio_pci_driver = { |
| 1201 | .name = KBUILD_MODNAME, |
| 1202 | .driver = { |
| 1203 | .owner = THIS_MODULE, |
| 1204 | }, |
| 1205 | .id_table = csio_pci_tbl, |
| 1206 | .probe = csio_probe_one, |
| 1207 | .remove = csio_remove_one, |
| 1208 | .err_handler = &csio_err_handler, |
| 1209 | }; |
| 1210 | |
| 1211 | /* |
| 1212 | * csio_init - Chelsio storage driver initialization function. |
| 1213 | * |
| 1214 | */ |
| 1215 | static int __init |
| 1216 | csio_init(void) |
| 1217 | { |
| 1218 | int rv = -ENOMEM; |
| 1219 | |
| 1220 | pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); |
| 1221 | |
| 1222 | csio_dfs_init(); |
| 1223 | |
| 1224 | csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); |
| 1225 | if (!csio_fcoe_transport) |
| 1226 | goto err; |
| 1227 | |
| 1228 | csio_fcoe_transport_vport = |
| 1229 | fc_attach_transport(&csio_fc_transport_vport_funcs); |
| 1230 | if (!csio_fcoe_transport_vport) |
| 1231 | goto err_vport; |
| 1232 | |
| 1233 | rv = pci_register_driver(&csio_pci_driver); |
| 1234 | if (rv) |
| 1235 | goto err_pci; |
| 1236 | |
| 1237 | return 0; |
| 1238 | |
| 1239 | err_pci: |
| 1240 | fc_release_transport(csio_fcoe_transport_vport); |
| 1241 | err_vport: |
| 1242 | fc_release_transport(csio_fcoe_transport); |
| 1243 | err: |
| 1244 | csio_dfs_exit(); |
| 1245 | return rv; |
| 1246 | } |
| 1247 | |
| 1248 | /* |
| 1249 | * csio_exit - Chelsio storage driver uninitialization . |
| 1250 | * |
| 1251 | * Function that gets called in the unload path. |
| 1252 | */ |
| 1253 | static void __exit |
| 1254 | csio_exit(void) |
| 1255 | { |
| 1256 | pci_unregister_driver(&csio_pci_driver); |
| 1257 | csio_dfs_exit(); |
| 1258 | fc_release_transport(csio_fcoe_transport_vport); |
| 1259 | fc_release_transport(csio_fcoe_transport); |
| 1260 | } |
| 1261 | |
| 1262 | module_init(csio_init); |
| 1263 | module_exit(csio_exit); |
| 1264 | MODULE_AUTHOR(CSIO_DRV_AUTHOR); |
| 1265 | MODULE_DESCRIPTION(CSIO_DRV_DESC); |
| 1266 | MODULE_LICENSE(CSIO_DRV_LICENSE); |
| 1267 | MODULE_DEVICE_TABLE(pci, csio_pci_tbl); |
| 1268 | MODULE_VERSION(CSIO_DRV_VERSION); |
| 1269 | MODULE_FIRMWARE(CSIO_FW_FNAME); |