1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Driver for the Micron P320 SSD 4 * Copyright (C) 2011 Micron Technology, Inc. 5 * 6 * Portions of this code were derived from works subjected to the 7 * following copyright: 8 * Copyright (C) 2009 Integrated Device Technology, Inc. 9 */ 10 11 #include <linux/pci.h> 12 #include <linux/interrupt.h> 13 #include <linux/ata.h> 14 #include <linux/delay.h> 15 #include <linux/hdreg.h> 16 #include <linux/uaccess.h> 17 #include <linux/random.h> 18 #include <linux/smp.h> 19 #include <linux/compat.h> 20 #include <linux/fs.h> 21 #include <linux/module.h> 22 #include <linux/genhd.h> 23 #include <linux/blkdev.h> 24 #include <linux/blk-mq.h> 25 #include <linux/bio.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/idr.h> 28 #include <linux/kthread.h> 29 #include <../drivers/ata/ahci.h> 30 #include <linux/export.h> 31 #include <linux/debugfs.h> 32 #include <linux/prefetch.h> 33 #include <linux/numa.h> 34 #include "mtip32xx.h" 35 36 #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32) 37 38 /* DMA region containing RX Fis, Identify, RLE10, and SMART buffers */ 39 #define AHCI_RX_FIS_SZ 0x100 40 #define AHCI_RX_FIS_OFFSET 0x0 41 #define AHCI_IDFY_SZ ATA_SECT_SIZE 42 #define AHCI_IDFY_OFFSET 0x400 43 #define AHCI_SECTBUF_SZ ATA_SECT_SIZE 44 #define AHCI_SECTBUF_OFFSET 0x800 45 #define AHCI_SMARTBUF_SZ ATA_SECT_SIZE 46 #define AHCI_SMARTBUF_OFFSET 0xC00 47 /* 0x100 + 0x200 + 0x200 + 0x200 is smaller than 4k but we pad it out */ 48 #define BLOCK_DMA_ALLOC_SZ 4096 49 50 /* DMA region containing command table (should be 8192 bytes) */ 51 #define AHCI_CMD_SLOT_SZ sizeof(struct mtip_cmd_hdr) 52 #define AHCI_CMD_TBL_SZ (MTIP_MAX_COMMAND_SLOTS * AHCI_CMD_SLOT_SZ) 53 #define AHCI_CMD_TBL_OFFSET 0x0 54 55 /* DMA region per command (contains header and SGL) */ 56 #define AHCI_CMD_TBL_HDR_SZ 0x80 57 #define AHCI_CMD_TBL_HDR_OFFSET 0x0 58 #define AHCI_CMD_TBL_SGL_SZ (MTIP_MAX_SG * sizeof(struct mtip_cmd_sg)) 59 #define AHCI_CMD_TBL_SGL_OFFSET AHCI_CMD_TBL_HDR_SZ 60 #define CMD_DMA_ALLOC_SZ (AHCI_CMD_TBL_SGL_SZ + AHCI_CMD_TBL_HDR_SZ) 61 62 63 #define HOST_CAP_NZDMA (1 << 19) 64 #define HOST_HSORG 0xFC 65 #define HSORG_DISABLE_SLOTGRP_INTR (1<<24) 66 #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16) 67 #define HSORG_HWREV 0xFF00 68 #define HSORG_STYLE 0x8 69 #define HSORG_SLOTGROUPS 0x7 70 71 #define PORT_COMMAND_ISSUE 0x38 72 #define PORT_SDBV 0x7C 73 74 #define PORT_OFFSET 0x100 75 #define PORT_MEM_SIZE 0x80 76 77 #define PORT_IRQ_ERR \ 78 (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \ 79 PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \ 80 PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \ 81 PORT_IRQ_OVERFLOW) 82 #define PORT_IRQ_LEGACY \ 83 (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS) 84 #define PORT_IRQ_HANDLED \ 85 (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \ 86 PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \ 87 PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY) 88 #define DEF_PORT_IRQ \ 89 (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS) 90 91 /* product numbers */ 92 #define MTIP_PRODUCT_UNKNOWN 0x00 93 #define MTIP_PRODUCT_ASICFPGA 0x11 94 95 /* Device instance number, incremented each time a device is probed. */ 96 static int instance; 97 98 static LIST_HEAD(online_list); 99 static LIST_HEAD(removing_list); 100 static DEFINE_SPINLOCK(dev_lock); 101 102 /* 103 * Global variable used to hold the major block device number 104 * allocated in mtip_init(). 105 */ 106 static int mtip_major; 107 static struct dentry *dfs_parent; 108 static struct dentry *dfs_device_status; 109 110 static u32 cpu_use[NR_CPUS]; 111 112 static DEFINE_IDA(rssd_index_ida); 113 114 static int mtip_block_initialize(struct driver_data *dd); 115 116 #ifdef CONFIG_COMPAT 117 struct mtip_compat_ide_task_request_s { 118 __u8 io_ports[8]; 119 __u8 hob_ports[8]; 120 ide_reg_valid_t out_flags; 121 ide_reg_valid_t in_flags; 122 int data_phase; 123 int req_cmd; 124 compat_ulong_t out_size; 125 compat_ulong_t in_size; 126 }; 127 #endif 128 129 /* 130 * This function check_for_surprise_removal is called 131 * while card is removed from the system and it will 132 * read the vendor id from the configuration space 133 * 134 * @pdev Pointer to the pci_dev structure. 135 * 136 * return value 137 * true if device removed, else false 138 */ 139 static bool mtip_check_surprise_removal(struct pci_dev *pdev) 140 { 141 u16 vendor_id = 0; 142 struct driver_data *dd = pci_get_drvdata(pdev); 143 144 if (dd->sr) 145 return true; 146 147 /* Read the vendorID from the configuration space */ 148 pci_read_config_word(pdev, 0x00, &vendor_id); 149 if (vendor_id == 0xFFFF) { 150 dd->sr = true; 151 if (dd->queue) 152 blk_queue_flag_set(QUEUE_FLAG_DEAD, dd->queue); 153 else 154 dev_warn(&dd->pdev->dev, 155 "%s: dd->queue is NULL\n", __func__); 156 return true; /* device removed */ 157 } 158 159 return false; /* device present */ 160 } 161 162 static struct mtip_cmd *mtip_cmd_from_tag(struct driver_data *dd, 163 unsigned int tag) 164 { 165 struct blk_mq_hw_ctx *hctx = dd->queue->queue_hw_ctx[0]; 166 167 return blk_mq_rq_to_pdu(blk_mq_tag_to_rq(hctx->tags, tag)); 168 } 169 170 /* 171 * Reset the HBA (without sleeping) 172 * 173 * @dd Pointer to the driver data structure. 174 * 175 * return value 176 * 0 The reset was successful. 177 * -1 The HBA Reset bit did not clear. 178 */ 179 static int mtip_hba_reset(struct driver_data *dd) 180 { 181 unsigned long timeout; 182 183 /* Set the reset bit */ 184 writel(HOST_RESET, dd->mmio + HOST_CTL); 185 186 /* Flush */ 187 readl(dd->mmio + HOST_CTL); 188 189 /* 190 * Spin for up to 10 seconds waiting for reset acknowledgement. Spec 191 * is 1 sec but in LUN failure conditions, up to 10 secs are required 192 */ 193 timeout = jiffies + msecs_to_jiffies(10000); 194 do { 195 mdelay(10); 196 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) 197 return -1; 198 199 } while ((readl(dd->mmio + HOST_CTL) & HOST_RESET) 200 && time_before(jiffies, timeout)); 201 202 if (readl(dd->mmio + HOST_CTL) & HOST_RESET) 203 return -1; 204 205 return 0; 206 } 207 208 /* 209 * Issue a command to the hardware. 210 * 211 * Set the appropriate bit in the s_active and Command Issue hardware 212 * registers, causing hardware command processing to begin. 213 * 214 * @port Pointer to the port structure. 215 * @tag The tag of the command to be issued. 216 * 217 * return value 218 * None 219 */ 220 static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag) 221 { 222 int group = tag >> 5; 223 224 /* guard SACT and CI registers */ 225 spin_lock(&port->cmd_issue_lock[group]); 226 writel((1 << MTIP_TAG_BIT(tag)), 227 port->s_active[MTIP_TAG_INDEX(tag)]); 228 writel((1 << MTIP_TAG_BIT(tag)), 229 port->cmd_issue[MTIP_TAG_INDEX(tag)]); 230 spin_unlock(&port->cmd_issue_lock[group]); 231 } 232 233 /* 234 * Enable/disable the reception of FIS 235 * 236 * @port Pointer to the port data structure 237 * @enable 1 to enable, 0 to disable 238 * 239 * return value 240 * Previous state: 1 enabled, 0 disabled 241 */ 242 static int mtip_enable_fis(struct mtip_port *port, int enable) 243 { 244 u32 tmp; 245 246 /* enable FIS reception */ 247 tmp = readl(port->mmio + PORT_CMD); 248 if (enable) 249 writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD); 250 else 251 writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD); 252 253 /* Flush */ 254 readl(port->mmio + PORT_CMD); 255 256 return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX)); 257 } 258 259 /* 260 * Enable/disable the DMA engine 261 * 262 * @port Pointer to the port data structure 263 * @enable 1 to enable, 0 to disable 264 * 265 * return value 266 * Previous state: 1 enabled, 0 disabled. 267 */ 268 static int mtip_enable_engine(struct mtip_port *port, int enable) 269 { 270 u32 tmp; 271 272 /* enable FIS reception */ 273 tmp = readl(port->mmio + PORT_CMD); 274 if (enable) 275 writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD); 276 else 277 writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD); 278 279 readl(port->mmio + PORT_CMD); 280 return (((tmp & PORT_CMD_START) == PORT_CMD_START)); 281 } 282 283 /* 284 * Enables the port DMA engine and FIS reception. 285 * 286 * return value 287 * None 288 */ 289 static inline void mtip_start_port(struct mtip_port *port) 290 { 291 /* Enable FIS reception */ 292 mtip_enable_fis(port, 1); 293 294 /* Enable the DMA engine */ 295 mtip_enable_engine(port, 1); 296 } 297 298 /* 299 * Deinitialize a port by disabling port interrupts, the DMA engine, 300 * and FIS reception. 301 * 302 * @port Pointer to the port structure 303 * 304 * return value 305 * None 306 */ 307 static inline void mtip_deinit_port(struct mtip_port *port) 308 { 309 /* Disable interrupts on this port */ 310 writel(0, port->mmio + PORT_IRQ_MASK); 311 312 /* Disable the DMA engine */ 313 mtip_enable_engine(port, 0); 314 315 /* Disable FIS reception */ 316 mtip_enable_fis(port, 0); 317 } 318 319 /* 320 * Initialize a port. 321 * 322 * This function deinitializes the port by calling mtip_deinit_port() and 323 * then initializes it by setting the command header and RX FIS addresses, 324 * clearing the SError register and any pending port interrupts before 325 * re-enabling the default set of port interrupts. 326 * 327 * @port Pointer to the port structure. 328 * 329 * return value 330 * None 331 */ 332 static void mtip_init_port(struct mtip_port *port) 333 { 334 int i; 335 mtip_deinit_port(port); 336 337 /* Program the command list base and FIS base addresses */ 338 if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) { 339 writel((port->command_list_dma >> 16) >> 16, 340 port->mmio + PORT_LST_ADDR_HI); 341 writel((port->rxfis_dma >> 16) >> 16, 342 port->mmio + PORT_FIS_ADDR_HI); 343 set_bit(MTIP_PF_HOST_CAP_64, &port->flags); 344 } 345 346 writel(port->command_list_dma & 0xFFFFFFFF, 347 port->mmio + PORT_LST_ADDR); 348 writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR); 349 350 /* Clear SError */ 351 writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR); 352 353 /* reset the completed registers.*/ 354 for (i = 0; i < port->dd->slot_groups; i++) 355 writel(0xFFFFFFFF, port->completed[i]); 356 357 /* Clear any pending interrupts for this port */ 358 writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT); 359 360 /* Clear any pending interrupts on the HBA. */ 361 writel(readl(port->dd->mmio + HOST_IRQ_STAT), 362 port->dd->mmio + HOST_IRQ_STAT); 363 364 /* Enable port interrupts */ 365 writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK); 366 } 367 368 /* 369 * Restart a port 370 * 371 * @port Pointer to the port data structure. 372 * 373 * return value 374 * None 375 */ 376 static void mtip_restart_port(struct mtip_port *port) 377 { 378 unsigned long timeout; 379 380 /* Disable the DMA engine */ 381 mtip_enable_engine(port, 0); 382 383 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */ 384 timeout = jiffies + msecs_to_jiffies(500); 385 while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) 386 && time_before(jiffies, timeout)) 387 ; 388 389 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) 390 return; 391 392 /* 393 * Chip quirk: escalate to hba reset if 394 * PxCMD.CR not clear after 500 ms 395 */ 396 if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) { 397 dev_warn(&port->dd->pdev->dev, 398 "PxCMD.CR not clear, escalating reset\n"); 399 400 if (mtip_hba_reset(port->dd)) 401 dev_err(&port->dd->pdev->dev, 402 "HBA reset escalation failed.\n"); 403 404 /* 30 ms delay before com reset to quiesce chip */ 405 mdelay(30); 406 } 407 408 dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n"); 409 410 /* Set PxSCTL.DET */ 411 writel(readl(port->mmio + PORT_SCR_CTL) | 412 1, port->mmio + PORT_SCR_CTL); 413 readl(port->mmio + PORT_SCR_CTL); 414 415 /* Wait 1 ms to quiesce chip function */ 416 timeout = jiffies + msecs_to_jiffies(1); 417 while (time_before(jiffies, timeout)) 418 ; 419 420 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) 421 return; 422 423 /* Clear PxSCTL.DET */ 424 writel(readl(port->mmio + PORT_SCR_CTL) & ~1, 425 port->mmio + PORT_SCR_CTL); 426 readl(port->mmio + PORT_SCR_CTL); 427 428 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */ 429 timeout = jiffies + msecs_to_jiffies(500); 430 while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) 431 && time_before(jiffies, timeout)) 432 ; 433 434 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) 435 return; 436 437 if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) 438 dev_warn(&port->dd->pdev->dev, 439 "COM reset failed\n"); 440 441 mtip_init_port(port); 442 mtip_start_port(port); 443 444 } 445 446 static int mtip_device_reset(struct driver_data *dd) 447 { 448 int rv = 0; 449 450 if (mtip_check_surprise_removal(dd->pdev)) 451 return 0; 452 453 if (mtip_hba_reset(dd) < 0) 454 rv = -EFAULT; 455 456 mdelay(1); 457 mtip_init_port(dd->port); 458 mtip_start_port(dd->port); 459 460 /* Enable interrupts on the HBA. */ 461 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, 462 dd->mmio + HOST_CTL); 463 return rv; 464 } 465 466 /* 467 * Helper function for tag logging 468 */ 469 static void print_tags(struct driver_data *dd, 470 char *msg, 471 unsigned long *tagbits, 472 int cnt) 473 { 474 unsigned char tagmap[128]; 475 int group, tagmap_len = 0; 476 477 memset(tagmap, 0, sizeof(tagmap)); 478 for (group = SLOTBITS_IN_LONGS; group > 0; group--) 479 tagmap_len += sprintf(tagmap + tagmap_len, "%016lX ", 480 tagbits[group-1]); 481 dev_warn(&dd->pdev->dev, 482 "%d command(s) %s: tagmap [%s]", cnt, msg, tagmap); 483 } 484 485 static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer, 486 dma_addr_t buffer_dma, unsigned int sectors); 487 static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id, 488 struct smart_attr *attrib); 489 490 static void mtip_complete_command(struct mtip_cmd *cmd, blk_status_t status) 491 { 492 struct request *req = blk_mq_rq_from_pdu(cmd); 493 494 cmd->status = status; 495 if (likely(!blk_should_fake_timeout(req->q))) 496 blk_mq_complete_request(req); 497 } 498 499 /* 500 * Handle an error. 501 * 502 * @dd Pointer to the DRIVER_DATA structure. 503 * 504 * return value 505 * None 506 */ 507 static void mtip_handle_tfe(struct driver_data *dd) 508 { 509 int group, tag, bit, reissue, rv; 510 struct mtip_port *port; 511 struct mtip_cmd *cmd; 512 u32 completed; 513 struct host_to_dev_fis *fis; 514 unsigned long tagaccum[SLOTBITS_IN_LONGS]; 515 unsigned int cmd_cnt = 0; 516 unsigned char *buf; 517 char *fail_reason = NULL; 518 int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0; 519 520 dev_warn(&dd->pdev->dev, "Taskfile error\n"); 521 522 port = dd->port; 523 524 if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) { 525 cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL); 526 dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n"); 527 mtip_complete_command(cmd, BLK_STS_IOERR); 528 return; 529 } 530 531 /* clear the tag accumulator */ 532 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); 533 534 /* Loop through all the groups */ 535 for (group = 0; group < dd->slot_groups; group++) { 536 completed = readl(port->completed[group]); 537 538 dev_warn(&dd->pdev->dev, "g=%u, comp=%x\n", group, completed); 539 540 /* clear completed status register in the hardware.*/ 541 writel(completed, port->completed[group]); 542 543 /* Process successfully completed commands */ 544 for (bit = 0; bit < 32 && completed; bit++) { 545 if (!(completed & (1<<bit))) 546 continue; 547 tag = (group << 5) + bit; 548 549 /* Skip the internal command slot */ 550 if (tag == MTIP_TAG_INTERNAL) 551 continue; 552 553 cmd = mtip_cmd_from_tag(dd, tag); 554 mtip_complete_command(cmd, 0); 555 set_bit(tag, tagaccum); 556 cmd_cnt++; 557 } 558 } 559 560 print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt); 561 562 /* Restart the port */ 563 mdelay(20); 564 mtip_restart_port(port); 565 566 /* Trying to determine the cause of the error */ 567 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, 568 dd->port->log_buf, 569 dd->port->log_buf_dma, 1); 570 if (rv) { 571 dev_warn(&dd->pdev->dev, 572 "Error in READ LOG EXT (10h) command\n"); 573 /* non-critical error, don't fail the load */ 574 } else { 575 buf = (unsigned char *)dd->port->log_buf; 576 if (buf[259] & 0x1) { 577 dev_info(&dd->pdev->dev, 578 "Write protect bit is set.\n"); 579 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); 580 fail_all_ncq_write = 1; 581 fail_reason = "write protect"; 582 } 583 if (buf[288] == 0xF7) { 584 dev_info(&dd->pdev->dev, 585 "Exceeded Tmax, drive in thermal shutdown.\n"); 586 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); 587 fail_all_ncq_cmds = 1; 588 fail_reason = "thermal shutdown"; 589 } 590 if (buf[288] == 0xBF) { 591 set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag); 592 dev_info(&dd->pdev->dev, 593 "Drive indicates rebuild has failed. Secure erase required.\n"); 594 fail_all_ncq_cmds = 1; 595 fail_reason = "rebuild failed"; 596 } 597 } 598 599 /* clear the tag accumulator */ 600 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); 601 602 /* Loop through all the groups */ 603 for (group = 0; group < dd->slot_groups; group++) { 604 for (bit = 0; bit < 32; bit++) { 605 reissue = 1; 606 tag = (group << 5) + bit; 607 cmd = mtip_cmd_from_tag(dd, tag); 608 609 fis = (struct host_to_dev_fis *)cmd->command; 610 611 /* Should re-issue? */ 612 if (tag == MTIP_TAG_INTERNAL || 613 fis->command == ATA_CMD_SET_FEATURES) 614 reissue = 0; 615 else { 616 if (fail_all_ncq_cmds || 617 (fail_all_ncq_write && 618 fis->command == ATA_CMD_FPDMA_WRITE)) { 619 dev_warn(&dd->pdev->dev, 620 " Fail: %s w/tag %d [%s].\n", 621 fis->command == ATA_CMD_FPDMA_WRITE ? 622 "write" : "read", 623 tag, 624 fail_reason != NULL ? 625 fail_reason : "unknown"); 626 mtip_complete_command(cmd, BLK_STS_MEDIUM); 627 continue; 628 } 629 } 630 631 /* 632 * First check if this command has 633 * exceeded its retries. 634 */ 635 if (reissue && (cmd->retries-- > 0)) { 636 637 set_bit(tag, tagaccum); 638 639 /* Re-issue the command. */ 640 mtip_issue_ncq_command(port, tag); 641 642 continue; 643 } 644 645 /* Retire a command that will not be reissued */ 646 dev_warn(&port->dd->pdev->dev, 647 "retiring tag %d\n", tag); 648 649 mtip_complete_command(cmd, BLK_STS_IOERR); 650 } 651 } 652 print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt); 653 } 654 655 /* 656 * Handle a set device bits interrupt 657 */ 658 static inline void mtip_workq_sdbfx(struct mtip_port *port, int group, 659 u32 completed) 660 { 661 struct driver_data *dd = port->dd; 662 int tag, bit; 663 struct mtip_cmd *command; 664 665 if (!completed) { 666 WARN_ON_ONCE(!completed); 667 return; 668 } 669 /* clear completed status register in the hardware.*/ 670 writel(completed, port->completed[group]); 671 672 /* Process completed commands. */ 673 for (bit = 0; (bit < 32) && completed; bit++) { 674 if (completed & 0x01) { 675 tag = (group << 5) | bit; 676 677 /* skip internal command slot. */ 678 if (unlikely(tag == MTIP_TAG_INTERNAL)) 679 continue; 680 681 command = mtip_cmd_from_tag(dd, tag); 682 mtip_complete_command(command, 0); 683 } 684 completed >>= 1; 685 } 686 687 /* If last, re-enable interrupts */ 688 if (atomic_dec_return(&dd->irq_workers_active) == 0) 689 writel(0xffffffff, dd->mmio + HOST_IRQ_STAT); 690 } 691 692 /* 693 * Process legacy pio and d2h interrupts 694 */ 695 static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat) 696 { 697 struct mtip_port *port = dd->port; 698 struct mtip_cmd *cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL); 699 700 if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) && cmd) { 701 int group = MTIP_TAG_INDEX(MTIP_TAG_INTERNAL); 702 int status = readl(port->cmd_issue[group]); 703 704 if (!(status & (1 << MTIP_TAG_BIT(MTIP_TAG_INTERNAL)))) 705 mtip_complete_command(cmd, 0); 706 } 707 } 708 709 /* 710 * Demux and handle errors 711 */ 712 static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat) 713 { 714 if (unlikely(port_stat & PORT_IRQ_CONNECT)) { 715 dev_warn(&dd->pdev->dev, 716 "Clearing PxSERR.DIAG.x\n"); 717 writel((1 << 26), dd->port->mmio + PORT_SCR_ERR); 718 } 719 720 if (unlikely(port_stat & PORT_IRQ_PHYRDY)) { 721 dev_warn(&dd->pdev->dev, 722 "Clearing PxSERR.DIAG.n\n"); 723 writel((1 << 16), dd->port->mmio + PORT_SCR_ERR); 724 } 725 726 if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) { 727 dev_warn(&dd->pdev->dev, 728 "Port stat errors %x unhandled\n", 729 (port_stat & ~PORT_IRQ_HANDLED)); 730 if (mtip_check_surprise_removal(dd->pdev)) 731 return; 732 } 733 if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) { 734 set_bit(MTIP_PF_EH_ACTIVE_BIT, &dd->port->flags); 735 wake_up_interruptible(&dd->port->svc_wait); 736 } 737 } 738 739 static inline irqreturn_t mtip_handle_irq(struct driver_data *data) 740 { 741 struct driver_data *dd = (struct driver_data *) data; 742 struct mtip_port *port = dd->port; 743 u32 hba_stat, port_stat; 744 int rv = IRQ_NONE; 745 int do_irq_enable = 1, i, workers; 746 struct mtip_work *twork; 747 748 hba_stat = readl(dd->mmio + HOST_IRQ_STAT); 749 if (hba_stat) { 750 rv = IRQ_HANDLED; 751 752 /* Acknowledge the interrupt status on the port.*/ 753 port_stat = readl(port->mmio + PORT_IRQ_STAT); 754 if (unlikely(port_stat == 0xFFFFFFFF)) { 755 mtip_check_surprise_removal(dd->pdev); 756 return IRQ_HANDLED; 757 } 758 writel(port_stat, port->mmio + PORT_IRQ_STAT); 759 760 /* Demux port status */ 761 if (likely(port_stat & PORT_IRQ_SDB_FIS)) { 762 do_irq_enable = 0; 763 WARN_ON_ONCE(atomic_read(&dd->irq_workers_active) != 0); 764 765 /* Start at 1: group zero is always local? */ 766 for (i = 0, workers = 0; i < MTIP_MAX_SLOT_GROUPS; 767 i++) { 768 twork = &dd->work[i]; 769 twork->completed = readl(port->completed[i]); 770 if (twork->completed) 771 workers++; 772 } 773 774 atomic_set(&dd->irq_workers_active, workers); 775 if (workers) { 776 for (i = 1; i < MTIP_MAX_SLOT_GROUPS; i++) { 777 twork = &dd->work[i]; 778 if (twork->completed) 779 queue_work_on( 780 twork->cpu_binding, 781 dd->isr_workq, 782 &twork->work); 783 } 784 785 if (likely(dd->work[0].completed)) 786 mtip_workq_sdbfx(port, 0, 787 dd->work[0].completed); 788 789 } else { 790 /* 791 * Chip quirk: SDB interrupt but nothing 792 * to complete 793 */ 794 do_irq_enable = 1; 795 } 796 } 797 798 if (unlikely(port_stat & PORT_IRQ_ERR)) { 799 if (unlikely(mtip_check_surprise_removal(dd->pdev))) { 800 /* don't proceed further */ 801 return IRQ_HANDLED; 802 } 803 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, 804 &dd->dd_flag)) 805 return rv; 806 807 mtip_process_errors(dd, port_stat & PORT_IRQ_ERR); 808 } 809 810 if (unlikely(port_stat & PORT_IRQ_LEGACY)) 811 mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY); 812 } 813 814 /* acknowledge interrupt */ 815 if (unlikely(do_irq_enable)) 816 writel(hba_stat, dd->mmio + HOST_IRQ_STAT); 817 818 return rv; 819 } 820 821 /* 822 * HBA interrupt subroutine. 823 * 824 * @irq IRQ number. 825 * @instance Pointer to the driver data structure. 826 * 827 * return value 828 * IRQ_HANDLED A HBA interrupt was pending and handled. 829 * IRQ_NONE This interrupt was not for the HBA. 830 */ 831 static irqreturn_t mtip_irq_handler(int irq, void *instance) 832 { 833 struct driver_data *dd = instance; 834 835 return mtip_handle_irq(dd); 836 } 837 838 static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag) 839 { 840 writel(1 << MTIP_TAG_BIT(tag), port->cmd_issue[MTIP_TAG_INDEX(tag)]); 841 } 842 843 static bool mtip_pause_ncq(struct mtip_port *port, 844 struct host_to_dev_fis *fis) 845 { 846 unsigned long task_file_data; 847 848 task_file_data = readl(port->mmio+PORT_TFDATA); 849 if ((task_file_data & 1)) 850 return false; 851 852 if (fis->command == ATA_CMD_SEC_ERASE_PREP) { 853 port->ic_pause_timer = jiffies; 854 return true; 855 } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) && 856 (fis->features == 0x03)) { 857 set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); 858 port->ic_pause_timer = jiffies; 859 return true; 860 } else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) || 861 ((fis->command == 0xFC) && 862 (fis->features == 0x27 || fis->features == 0x72 || 863 fis->features == 0x62 || fis->features == 0x26))) { 864 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag); 865 clear_bit(MTIP_DDF_REBUILD_FAILED_BIT, &port->dd->dd_flag); 866 /* Com reset after secure erase or lowlevel format */ 867 mtip_restart_port(port); 868 clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); 869 return false; 870 } 871 872 return false; 873 } 874 875 static bool mtip_commands_active(struct mtip_port *port) 876 { 877 unsigned int active; 878 unsigned int n; 879 880 /* 881 * Ignore s_active bit 0 of array element 0. 882 * This bit will always be set 883 */ 884 active = readl(port->s_active[0]) & 0xFFFFFFFE; 885 for (n = 1; n < port->dd->slot_groups; n++) 886 active |= readl(port->s_active[n]); 887 888 return active != 0; 889 } 890 891 /* 892 * Wait for port to quiesce 893 * 894 * @port Pointer to port data structure 895 * @timeout Max duration to wait (ms) 896 * 897 * return value 898 * 0 Success 899 * -EBUSY Commands still active 900 */ 901 static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) 902 { 903 unsigned long to; 904 bool active = true; 905 906 blk_mq_quiesce_queue(port->dd->queue); 907 908 to = jiffies + msecs_to_jiffies(timeout); 909 do { 910 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) && 911 test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { 912 msleep(20); 913 continue; /* svc thd is actively issuing commands */ 914 } 915 916 msleep(100); 917 918 if (mtip_check_surprise_removal(port->dd->pdev)) 919 goto err_fault; 920 921 active = mtip_commands_active(port); 922 if (!active) 923 break; 924 } while (time_before(jiffies, to)); 925 926 blk_mq_unquiesce_queue(port->dd->queue); 927 return active ? -EBUSY : 0; 928 err_fault: 929 blk_mq_unquiesce_queue(port->dd->queue); 930 return -EFAULT; 931 } 932 933 struct mtip_int_cmd { 934 int fis_len; 935 dma_addr_t buffer; 936 int buf_len; 937 u32 opts; 938 }; 939 940 /* 941 * Execute an internal command and wait for the completion. 942 * 943 * @port Pointer to the port data structure. 944 * @fis Pointer to the FIS that describes the command. 945 * @fis_len Length in WORDS of the FIS. 946 * @buffer DMA accessible for command data. 947 * @buf_len Length, in bytes, of the data buffer. 948 * @opts Command header options, excluding the FIS length 949 * and the number of PRD entries. 950 * @timeout Time in ms to wait for the command to complete. 951 * 952 * return value 953 * 0 Command completed successfully. 954 * -EFAULT The buffer address is not correctly aligned. 955 * -EBUSY Internal command or other IO in progress. 956 * -EAGAIN Time out waiting for command to complete. 957 */ 958 static int mtip_exec_internal_command(struct mtip_port *port, 959 struct host_to_dev_fis *fis, 960 int fis_len, 961 dma_addr_t buffer, 962 int buf_len, 963 u32 opts, 964 unsigned long timeout) 965 { 966 struct mtip_cmd *int_cmd; 967 struct driver_data *dd = port->dd; 968 struct request *rq; 969 struct mtip_int_cmd icmd = { 970 .fis_len = fis_len, 971 .buffer = buffer, 972 .buf_len = buf_len, 973 .opts = opts 974 }; 975 int rv = 0; 976 977 /* Make sure the buffer is 8 byte aligned. This is asic specific. */ 978 if (buffer & 0x00000007) { 979 dev_err(&dd->pdev->dev, "SG buffer is not 8 byte aligned\n"); 980 return -EFAULT; 981 } 982 983 if (mtip_check_surprise_removal(dd->pdev)) 984 return -EFAULT; 985 986 rq = blk_mq_alloc_request(dd->queue, REQ_OP_DRV_IN, BLK_MQ_REQ_RESERVED); 987 if (IS_ERR(rq)) { 988 dbg_printk(MTIP_DRV_NAME "Unable to allocate tag for PIO cmd\n"); 989 return -EFAULT; 990 } 991 992 set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); 993 994 if (fis->command == ATA_CMD_SEC_ERASE_PREP) 995 set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); 996 997 clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); 998 999 if (fis->command != ATA_CMD_STANDBYNOW1) { 1000 /* wait for io to complete if non atomic */ 1001 if (mtip_quiesce_io(port, MTIP_QUIESCE_IO_TIMEOUT_MS) < 0) { 1002 dev_warn(&dd->pdev->dev, "Failed to quiesce IO\n"); 1003 blk_mq_free_request(rq); 1004 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); 1005 wake_up_interruptible(&port->svc_wait); 1006 return -EBUSY; 1007 } 1008 } 1009 1010 /* Copy the command to the command table */ 1011 int_cmd = blk_mq_rq_to_pdu(rq); 1012 int_cmd->icmd = &icmd; 1013 memcpy(int_cmd->command, fis, fis_len*4); 1014 1015 rq->timeout = timeout; 1016 1017 /* insert request and run queue */ 1018 blk_execute_rq(NULL, rq, true); 1019 1020 if (int_cmd->status) { 1021 dev_err(&dd->pdev->dev, "Internal command [%02X] failed %d\n", 1022 fis->command, int_cmd->status); 1023 rv = -EIO; 1024 1025 if (mtip_check_surprise_removal(dd->pdev) || 1026 test_bit(MTIP_DDF_REMOVE_PENDING_BIT, 1027 &dd->dd_flag)) { 1028 dev_err(&dd->pdev->dev, 1029 "Internal command [%02X] wait returned due to SR\n", 1030 fis->command); 1031 rv = -ENXIO; 1032 goto exec_ic_exit; 1033 } 1034 mtip_device_reset(dd); /* recover from timeout issue */ 1035 rv = -EAGAIN; 1036 goto exec_ic_exit; 1037 } 1038 1039 if (readl(port->cmd_issue[MTIP_TAG_INDEX(MTIP_TAG_INTERNAL)]) 1040 & (1 << MTIP_TAG_BIT(MTIP_TAG_INTERNAL))) { 1041 rv = -ENXIO; 1042 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) { 1043 mtip_device_reset(dd); 1044 rv = -EAGAIN; 1045 } 1046 } 1047 exec_ic_exit: 1048 /* Clear the allocated and active bits for the internal command. */ 1049 blk_mq_free_request(rq); 1050 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); 1051 if (rv >= 0 && mtip_pause_ncq(port, fis)) { 1052 /* NCQ paused */ 1053 return rv; 1054 } 1055 wake_up_interruptible(&port->svc_wait); 1056 1057 return rv; 1058 } 1059 1060 /* 1061 * Byte-swap ATA ID strings. 1062 * 1063 * ATA identify data contains strings in byte-swapped 16-bit words. 1064 * They must be swapped (on all architectures) to be usable as C strings. 1065 * This function swaps bytes in-place. 1066 * 1067 * @buf The buffer location of the string 1068 * @len The number of bytes to swap 1069 * 1070 * return value 1071 * None 1072 */ 1073 static inline void ata_swap_string(u16 *buf, unsigned int len) 1074 { 1075 int i; 1076 for (i = 0; i < (len/2); i++) 1077 be16_to_cpus(&buf[i]); 1078 } 1079 1080 static void mtip_set_timeout(struct driver_data *dd, 1081 struct host_to_dev_fis *fis, 1082 unsigned int *timeout, u8 erasemode) 1083 { 1084 switch (fis->command) { 1085 case ATA_CMD_DOWNLOAD_MICRO: 1086 *timeout = 120000; /* 2 minutes */ 1087 break; 1088 case ATA_CMD_SEC_ERASE_UNIT: 1089 case 0xFC: 1090 if (erasemode) 1091 *timeout = ((*(dd->port->identify + 90) * 2) * 60000); 1092 else 1093 *timeout = ((*(dd->port->identify + 89) * 2) * 60000); 1094 break; 1095 case ATA_CMD_STANDBYNOW1: 1096 *timeout = 120000; /* 2 minutes */ 1097 break; 1098 case 0xF7: 1099 case 0xFA: 1100 *timeout = 60000; /* 60 seconds */ 1101 break; 1102 case ATA_CMD_SMART: 1103 *timeout = 15000; /* 15 seconds */ 1104 break; 1105 default: 1106 *timeout = MTIP_IOCTL_CMD_TIMEOUT_MS; 1107 break; 1108 } 1109 } 1110 1111 /* 1112 * Request the device identity information. 1113 * 1114 * If a user space buffer is not specified, i.e. is NULL, the 1115 * identify information is still read from the drive and placed 1116 * into the identify data buffer (@e port->identify) in the 1117 * port data structure. 1118 * When the identify buffer contains valid identify information @e 1119 * port->identify_valid is non-zero. 1120 * 1121 * @port Pointer to the port structure. 1122 * @user_buffer A user space buffer where the identify data should be 1123 * copied. 1124 * 1125 * return value 1126 * 0 Command completed successfully. 1127 * -EFAULT An error occurred while coping data to the user buffer. 1128 * -1 Command failed. 1129 */ 1130 static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer) 1131 { 1132 int rv = 0; 1133 struct host_to_dev_fis fis; 1134 1135 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) 1136 return -EFAULT; 1137 1138 /* Build the FIS. */ 1139 memset(&fis, 0, sizeof(struct host_to_dev_fis)); 1140 fis.type = 0x27; 1141 fis.opts = 1 << 7; 1142 fis.command = ATA_CMD_ID_ATA; 1143 1144 /* Set the identify information as invalid. */ 1145 port->identify_valid = 0; 1146 1147 /* Clear the identify information. */ 1148 memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS); 1149 1150 /* Execute the command. */ 1151 if (mtip_exec_internal_command(port, 1152 &fis, 1153 5, 1154 port->identify_dma, 1155 sizeof(u16) * ATA_ID_WORDS, 1156 0, 1157 MTIP_INT_CMD_TIMEOUT_MS) 1158 < 0) { 1159 rv = -1; 1160 goto out; 1161 } 1162 1163 /* 1164 * Perform any necessary byte-swapping. Yes, the kernel does in fact 1165 * perform field-sensitive swapping on the string fields. 1166 * See the kernel use of ata_id_string() for proof of this. 1167 */ 1168 #ifdef __LITTLE_ENDIAN 1169 ata_swap_string(port->identify + 27, 40); /* model string*/ 1170 ata_swap_string(port->identify + 23, 8); /* firmware string*/ 1171 ata_swap_string(port->identify + 10, 20); /* serial# string*/ 1172 #else 1173 { 1174 int i; 1175 for (i = 0; i < ATA_ID_WORDS; i++) 1176 port->identify[i] = le16_to_cpu(port->identify[i]); 1177 } 1178 #endif 1179 1180 /* Check security locked state */ 1181 if (port->identify[128] & 0x4) 1182 set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag); 1183 else 1184 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag); 1185 1186 /* Set the identify buffer as valid. */ 1187 port->identify_valid = 1; 1188 1189 if (user_buffer) { 1190 if (copy_to_user( 1191 user_buffer, 1192 port->identify, 1193 ATA_ID_WORDS * sizeof(u16))) { 1194 rv = -EFAULT; 1195 goto out; 1196 } 1197 } 1198 1199 out: 1200 return rv; 1201 } 1202 1203 /* 1204 * Issue a standby immediate command to the device. 1205 * 1206 * @port Pointer to the port structure. 1207 * 1208 * return value 1209 * 0 Command was executed successfully. 1210 * -1 An error occurred while executing the command. 1211 */ 1212 static int mtip_standby_immediate(struct mtip_port *port) 1213 { 1214 int rv; 1215 struct host_to_dev_fis fis; 1216 unsigned long __maybe_unused start; 1217 unsigned int timeout; 1218 1219 /* Build the FIS. */ 1220 memset(&fis, 0, sizeof(struct host_to_dev_fis)); 1221 fis.type = 0x27; 1222 fis.opts = 1 << 7; 1223 fis.command = ATA_CMD_STANDBYNOW1; 1224 1225 mtip_set_timeout(port->dd, &fis, &timeout, 0); 1226 1227 start = jiffies; 1228 rv = mtip_exec_internal_command(port, 1229 &fis, 1230 5, 1231 0, 1232 0, 1233 0, 1234 timeout); 1235 dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n", 1236 jiffies_to_msecs(jiffies - start)); 1237 if (rv) 1238 dev_warn(&port->dd->pdev->dev, 1239 "STANDBY IMMEDIATE command failed.\n"); 1240 1241 return rv; 1242 } 1243 1244 /* 1245 * Issue a READ LOG EXT command to the device. 1246 * 1247 * @port pointer to the port structure. 1248 * @page page number to fetch 1249 * @buffer pointer to buffer 1250 * @buffer_dma dma address corresponding to @buffer 1251 * @sectors page length to fetch, in sectors 1252 * 1253 * return value 1254 * @rv return value from mtip_exec_internal_command() 1255 */ 1256 static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer, 1257 dma_addr_t buffer_dma, unsigned int sectors) 1258 { 1259 struct host_to_dev_fis fis; 1260 1261 memset(&fis, 0, sizeof(struct host_to_dev_fis)); 1262 fis.type = 0x27; 1263 fis.opts = 1 << 7; 1264 fis.command = ATA_CMD_READ_LOG_EXT; 1265 fis.sect_count = sectors & 0xFF; 1266 fis.sect_cnt_ex = (sectors >> 8) & 0xFF; 1267 fis.lba_low = page; 1268 fis.lba_mid = 0; 1269 fis.device = ATA_DEVICE_OBS; 1270 1271 memset(buffer, 0, sectors * ATA_SECT_SIZE); 1272 1273 return mtip_exec_internal_command(port, 1274 &fis, 1275 5, 1276 buffer_dma, 1277 sectors * ATA_SECT_SIZE, 1278 0, 1279 MTIP_INT_CMD_TIMEOUT_MS); 1280 } 1281 1282 /* 1283 * Issue a SMART READ DATA command to the device. 1284 * 1285 * @port pointer to the port structure. 1286 * @buffer pointer to buffer 1287 * @buffer_dma dma address corresponding to @buffer 1288 * 1289 * return value 1290 * @rv return value from mtip_exec_internal_command() 1291 */ 1292 static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer, 1293 dma_addr_t buffer_dma) 1294 { 1295 struct host_to_dev_fis fis; 1296 1297 memset(&fis, 0, sizeof(struct host_to_dev_fis)); 1298 fis.type = 0x27; 1299 fis.opts = 1 << 7; 1300 fis.command = ATA_CMD_SMART; 1301 fis.features = 0xD0; 1302 fis.sect_count = 1; 1303 fis.lba_mid = 0x4F; 1304 fis.lba_hi = 0xC2; 1305 fis.device = ATA_DEVICE_OBS; 1306 1307 return mtip_exec_internal_command(port, 1308 &fis, 1309 5, 1310 buffer_dma, 1311 ATA_SECT_SIZE, 1312 0, 1313 15000); 1314 } 1315 1316 /* 1317 * Get the value of a smart attribute 1318 * 1319 * @port pointer to the port structure 1320 * @id attribute number 1321 * @attrib pointer to return attrib information corresponding to @id 1322 * 1323 * return value 1324 * -EINVAL NULL buffer passed or unsupported attribute @id. 1325 * -EPERM Identify data not valid, SMART not supported or not enabled 1326 */ 1327 static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id, 1328 struct smart_attr *attrib) 1329 { 1330 int rv, i; 1331 struct smart_attr *pattr; 1332 1333 if (!attrib) 1334 return -EINVAL; 1335 1336 if (!port->identify_valid) { 1337 dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n"); 1338 return -EPERM; 1339 } 1340 if (!(port->identify[82] & 0x1)) { 1341 dev_warn(&port->dd->pdev->dev, "SMART not supported\n"); 1342 return -EPERM; 1343 } 1344 if (!(port->identify[85] & 0x1)) { 1345 dev_warn(&port->dd->pdev->dev, "SMART not enabled\n"); 1346 return -EPERM; 1347 } 1348 1349 memset(port->smart_buf, 0, ATA_SECT_SIZE); 1350 rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma); 1351 if (rv) { 1352 dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n"); 1353 return rv; 1354 } 1355 1356 pattr = (struct smart_attr *)(port->smart_buf + 2); 1357 for (i = 0; i < 29; i++, pattr++) 1358 if (pattr->attr_id == id) { 1359 memcpy(attrib, pattr, sizeof(struct smart_attr)); 1360 break; 1361 } 1362 1363 if (i == 29) { 1364 dev_warn(&port->dd->pdev->dev, 1365 "Query for invalid SMART attribute ID\n"); 1366 rv = -EINVAL; 1367 } 1368 1369 return rv; 1370 } 1371 1372 /* 1373 * Get the drive capacity. 1374 * 1375 * @dd Pointer to the device data structure. 1376 * @sectors Pointer to the variable that will receive the sector count. 1377 * 1378 * return value 1379 * 1 Capacity was returned successfully. 1380 * 0 The identify information is invalid. 1381 */ 1382 static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors) 1383 { 1384 struct mtip_port *port = dd->port; 1385 u64 total, raw0, raw1, raw2, raw3; 1386 raw0 = port->identify[100]; 1387 raw1 = port->identify[101]; 1388 raw2 = port->identify[102]; 1389 raw3 = port->identify[103]; 1390 total = raw0 | raw1<<16 | raw2<<32 | raw3<<48; 1391 *sectors = total; 1392 return (bool) !!port->identify_valid; 1393 } 1394 1395 /* 1396 * Display the identify command data. 1397 * 1398 * @port Pointer to the port data structure. 1399 * 1400 * return value 1401 * None 1402 */ 1403 static void mtip_dump_identify(struct mtip_port *port) 1404 { 1405 sector_t sectors; 1406 unsigned short revid; 1407 char cbuf[42]; 1408 1409 if (!port->identify_valid) 1410 return; 1411 1412 strlcpy(cbuf, (char *)(port->identify+10), 21); 1413 dev_info(&port->dd->pdev->dev, 1414 "Serial No.: %s\n", cbuf); 1415 1416 strlcpy(cbuf, (char *)(port->identify+23), 9); 1417 dev_info(&port->dd->pdev->dev, 1418 "Firmware Ver.: %s\n", cbuf); 1419 1420 strlcpy(cbuf, (char *)(port->identify+27), 41); 1421 dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf); 1422 1423 dev_info(&port->dd->pdev->dev, "Security: %04x %s\n", 1424 port->identify[128], 1425 port->identify[128] & 0x4 ? "(LOCKED)" : ""); 1426 1427 if (mtip_hw_get_capacity(port->dd, §ors)) 1428 dev_info(&port->dd->pdev->dev, 1429 "Capacity: %llu sectors (%llu MB)\n", 1430 (u64)sectors, 1431 ((u64)sectors) * ATA_SECT_SIZE >> 20); 1432 1433 pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid); 1434 switch (revid & 0xFF) { 1435 case 0x1: 1436 strlcpy(cbuf, "A0", 3); 1437 break; 1438 case 0x3: 1439 strlcpy(cbuf, "A2", 3); 1440 break; 1441 default: 1442 strlcpy(cbuf, "?", 2); 1443 break; 1444 } 1445 dev_info(&port->dd->pdev->dev, 1446 "Card Type: %s\n", cbuf); 1447 } 1448 1449 /* 1450 * Map the commands scatter list into the command table. 1451 * 1452 * @command Pointer to the command. 1453 * @nents Number of scatter list entries. 1454 * 1455 * return value 1456 * None 1457 */ 1458 static inline void fill_command_sg(struct driver_data *dd, 1459 struct mtip_cmd *command, 1460 int nents) 1461 { 1462 int n; 1463 unsigned int dma_len; 1464 struct mtip_cmd_sg *command_sg; 1465 struct scatterlist *sg; 1466 1467 command_sg = command->command + AHCI_CMD_TBL_HDR_SZ; 1468 1469 for_each_sg(command->sg, sg, nents, n) { 1470 dma_len = sg_dma_len(sg); 1471 if (dma_len > 0x400000) 1472 dev_err(&dd->pdev->dev, 1473 "DMA segment length truncated\n"); 1474 command_sg->info = cpu_to_le32((dma_len-1) & 0x3FFFFF); 1475 command_sg->dba = cpu_to_le32(sg_dma_address(sg)); 1476 command_sg->dba_upper = 1477 cpu_to_le32((sg_dma_address(sg) >> 16) >> 16); 1478 command_sg++; 1479 } 1480 } 1481 1482 /* 1483 * @brief Execute a drive command. 1484 * 1485 * return value 0 The command completed successfully. 1486 * return value -1 An error occurred while executing the command. 1487 */ 1488 static int exec_drive_task(struct mtip_port *port, u8 *command) 1489 { 1490 struct host_to_dev_fis fis; 1491 struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG); 1492 unsigned int to; 1493 1494 /* Build the FIS. */ 1495 memset(&fis, 0, sizeof(struct host_to_dev_fis)); 1496 fis.type = 0x27; 1497 fis.opts = 1 << 7; 1498 fis.command = command[0]; 1499 fis.features = command[1]; 1500 fis.sect_count = command[2]; 1501 fis.sector = command[3]; 1502 fis.cyl_low = command[4]; 1503 fis.cyl_hi = command[5]; 1504 fis.device = command[6] & ~0x10; /* Clear the dev bit*/ 1505 1506 mtip_set_timeout(port->dd, &fis, &to, 0); 1507 1508 dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n", 1509 __func__, 1510 command[0], 1511 command[1], 1512 command[2], 1513 command[3], 1514 command[4], 1515 command[5], 1516 command[6]); 1517 1518 /* Execute the command. */ 1519 if (mtip_exec_internal_command(port, 1520 &fis, 1521 5, 1522 0, 1523 0, 1524 0, 1525 to) < 0) { 1526 return -1; 1527 } 1528 1529 command[0] = reply->command; /* Status*/ 1530 command[1] = reply->features; /* Error*/ 1531 command[4] = reply->cyl_low; 1532 command[5] = reply->cyl_hi; 1533 1534 dbg_printk(MTIP_DRV_NAME " %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n", 1535 __func__, 1536 command[0], 1537 command[1], 1538 command[4], 1539 command[5]); 1540 1541 return 0; 1542 } 1543 1544 /* 1545 * @brief Execute a drive command. 1546 * 1547 * @param port Pointer to the port data structure. 1548 * @param command Pointer to the user specified command parameters. 1549 * @param user_buffer Pointer to the user space buffer where read sector 1550 * data should be copied. 1551 * 1552 * return value 0 The command completed successfully. 1553 * return value -EFAULT An error occurred while copying the completion 1554 * data to the user space buffer. 1555 * return value -1 An error occurred while executing the command. 1556 */ 1557 static int exec_drive_command(struct mtip_port *port, u8 *command, 1558 void __user *user_buffer) 1559 { 1560 struct host_to_dev_fis fis; 1561 struct host_to_dev_fis *reply; 1562 u8 *buf = NULL; 1563 dma_addr_t dma_addr = 0; 1564 int rv = 0, xfer_sz = command[3]; 1565 unsigned int to; 1566 1567 if (xfer_sz) { 1568 if (!user_buffer) 1569 return -EFAULT; 1570 1571 buf = dma_alloc_coherent(&port->dd->pdev->dev, 1572 ATA_SECT_SIZE * xfer_sz, 1573 &dma_addr, 1574 GFP_KERNEL); 1575 if (!buf) { 1576 dev_err(&port->dd->pdev->dev, 1577 "Memory allocation failed (%d bytes)\n", 1578 ATA_SECT_SIZE * xfer_sz); 1579 return -ENOMEM; 1580 } 1581 } 1582 1583 /* Build the FIS. */ 1584 memset(&fis, 0, sizeof(struct host_to_dev_fis)); 1585 fis.type = 0x27; 1586 fis.opts = 1 << 7; 1587 fis.command = command[0]; 1588 fis.features = command[2]; 1589 fis.sect_count = command[3]; 1590 if (fis.command == ATA_CMD_SMART) { 1591 fis.sector = command[1]; 1592 fis.cyl_low = 0x4F; 1593 fis.cyl_hi = 0xC2; 1594 } 1595 1596 mtip_set_timeout(port->dd, &fis, &to, 0); 1597 1598 if (xfer_sz) 1599 reply = (port->rxfis + RX_FIS_PIO_SETUP); 1600 else 1601 reply = (port->rxfis + RX_FIS_D2H_REG); 1602 1603 dbg_printk(MTIP_DRV_NAME 1604 " %s: User Command: cmd %x, sect %x, " 1605 "feat %x, sectcnt %x\n", 1606 __func__, 1607 command[0], 1608 command[1], 1609 command[2], 1610 command[3]); 1611 1612 /* Execute the command. */ 1613 if (mtip_exec_internal_command(port, 1614 &fis, 1615 5, 1616 (xfer_sz ? dma_addr : 0), 1617 (xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0), 1618 0, 1619 to) 1620 < 0) { 1621 rv = -EFAULT; 1622 goto exit_drive_command; 1623 } 1624 1625 /* Collect the completion status. */ 1626 command[0] = reply->command; /* Status*/ 1627 command[1] = reply->features; /* Error*/ 1628 command[2] = reply->sect_count; 1629 1630 dbg_printk(MTIP_DRV_NAME 1631 " %s: Completion Status: stat %x, " 1632 "err %x, nsect %x\n", 1633 __func__, 1634 command[0], 1635 command[1], 1636 command[2]); 1637 1638 if (xfer_sz) { 1639 if (copy_to_user(user_buffer, 1640 buf, 1641 ATA_SECT_SIZE * command[3])) { 1642 rv = -EFAULT; 1643 goto exit_drive_command; 1644 } 1645 } 1646 exit_drive_command: 1647 if (buf) 1648 dma_free_coherent(&port->dd->pdev->dev, 1649 ATA_SECT_SIZE * xfer_sz, buf, dma_addr); 1650 return rv; 1651 } 1652 1653 /* 1654 * Indicates whether a command has a single sector payload. 1655 * 1656 * @command passed to the device to perform the certain event. 1657 * @features passed to the device to perform the certain event. 1658 * 1659 * return value 1660 * 1 command is one that always has a single sector payload, 1661 * regardless of the value in the Sector Count field. 1662 * 0 otherwise 1663 * 1664 */ 1665 static unsigned int implicit_sector(unsigned char command, 1666 unsigned char features) 1667 { 1668 unsigned int rv = 0; 1669 1670 /* list of commands that have an implicit sector count of 1 */ 1671 switch (command) { 1672 case ATA_CMD_SEC_SET_PASS: 1673 case ATA_CMD_SEC_UNLOCK: 1674 case ATA_CMD_SEC_ERASE_PREP: 1675 case ATA_CMD_SEC_ERASE_UNIT: 1676 case ATA_CMD_SEC_FREEZE_LOCK: 1677 case ATA_CMD_SEC_DISABLE_PASS: 1678 case ATA_CMD_PMP_READ: 1679 case ATA_CMD_PMP_WRITE: 1680 rv = 1; 1681 break; 1682 case ATA_CMD_SET_MAX: 1683 if (features == ATA_SET_MAX_UNLOCK) 1684 rv = 1; 1685 break; 1686 case ATA_CMD_SMART: 1687 if ((features == ATA_SMART_READ_VALUES) || 1688 (features == ATA_SMART_READ_THRESHOLDS)) 1689 rv = 1; 1690 break; 1691 case ATA_CMD_CONF_OVERLAY: 1692 if ((features == ATA_DCO_IDENTIFY) || 1693 (features == ATA_DCO_SET)) 1694 rv = 1; 1695 break; 1696 } 1697 return rv; 1698 } 1699 1700 /* 1701 * Executes a taskfile 1702 * See ide_taskfile_ioctl() for derivation 1703 */ 1704 static int exec_drive_taskfile(struct driver_data *dd, 1705 void __user *buf, 1706 ide_task_request_t *req_task, 1707 int outtotal) 1708 { 1709 struct host_to_dev_fis fis; 1710 struct host_to_dev_fis *reply; 1711 u8 *outbuf = NULL; 1712 u8 *inbuf = NULL; 1713 dma_addr_t outbuf_dma = 0; 1714 dma_addr_t inbuf_dma = 0; 1715 dma_addr_t dma_buffer = 0; 1716 int err = 0; 1717 unsigned int taskin = 0; 1718 unsigned int taskout = 0; 1719 u8 nsect = 0; 1720 unsigned int timeout; 1721 unsigned int force_single_sector; 1722 unsigned int transfer_size; 1723 unsigned long task_file_data; 1724 int intotal = outtotal + req_task->out_size; 1725 int erasemode = 0; 1726 1727 taskout = req_task->out_size; 1728 taskin = req_task->in_size; 1729 /* 130560 = 512 * 0xFF*/ 1730 if (taskin > 130560 || taskout > 130560) 1731 return -EINVAL; 1732 1733 if (taskout) { 1734 outbuf = memdup_user(buf + outtotal, taskout); 1735 if (IS_ERR(outbuf)) 1736 return PTR_ERR(outbuf); 1737 1738 outbuf_dma = dma_map_single(&dd->pdev->dev, outbuf, 1739 taskout, DMA_TO_DEVICE); 1740 if (dma_mapping_error(&dd->pdev->dev, outbuf_dma)) { 1741 err = -ENOMEM; 1742 goto abort; 1743 } 1744 dma_buffer = outbuf_dma; 1745 } 1746 1747 if (taskin) { 1748 inbuf = memdup_user(buf + intotal, taskin); 1749 if (IS_ERR(inbuf)) { 1750 err = PTR_ERR(inbuf); 1751 inbuf = NULL; 1752 goto abort; 1753 } 1754 inbuf_dma = dma_map_single(&dd->pdev->dev, inbuf, 1755 taskin, DMA_FROM_DEVICE); 1756 if (dma_mapping_error(&dd->pdev->dev, inbuf_dma)) { 1757 err = -ENOMEM; 1758 goto abort; 1759 } 1760 dma_buffer = inbuf_dma; 1761 } 1762 1763 /* only supports PIO and non-data commands from this ioctl. */ 1764 switch (req_task->data_phase) { 1765 case TASKFILE_OUT: 1766 nsect = taskout / ATA_SECT_SIZE; 1767 reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); 1768 break; 1769 case TASKFILE_IN: 1770 reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); 1771 break; 1772 case TASKFILE_NO_DATA: 1773 reply = (dd->port->rxfis + RX_FIS_D2H_REG); 1774 break; 1775 default: 1776 err = -EINVAL; 1777 goto abort; 1778 } 1779 1780 /* Build the FIS. */ 1781 memset(&fis, 0, sizeof(struct host_to_dev_fis)); 1782 1783 fis.type = 0x27; 1784 fis.opts = 1 << 7; 1785 fis.command = req_task->io_ports[7]; 1786 fis.features = req_task->io_ports[1]; 1787 fis.sect_count = req_task->io_ports[2]; 1788 fis.lba_low = req_task->io_ports[3]; 1789 fis.lba_mid = req_task->io_ports[4]; 1790 fis.lba_hi = req_task->io_ports[5]; 1791 /* Clear the dev bit*/ 1792 fis.device = req_task->io_ports[6] & ~0x10; 1793 1794 if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) { 1795 req_task->in_flags.all = 1796 IDE_TASKFILE_STD_IN_FLAGS | 1797 (IDE_HOB_STD_IN_FLAGS << 8); 1798 fis.lba_low_ex = req_task->hob_ports[3]; 1799 fis.lba_mid_ex = req_task->hob_ports[4]; 1800 fis.lba_hi_ex = req_task->hob_ports[5]; 1801 fis.features_ex = req_task->hob_ports[1]; 1802 fis.sect_cnt_ex = req_task->hob_ports[2]; 1803 1804 } else { 1805 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; 1806 } 1807 1808 force_single_sector = implicit_sector(fis.command, fis.features); 1809 1810 if ((taskin || taskout) && (!fis.sect_count)) { 1811 if (nsect) 1812 fis.sect_count = nsect; 1813 else { 1814 if (!force_single_sector) { 1815 dev_warn(&dd->pdev->dev, 1816 "data movement but " 1817 "sect_count is 0\n"); 1818 err = -EINVAL; 1819 goto abort; 1820 } 1821 } 1822 } 1823 1824 dbg_printk(MTIP_DRV_NAME 1825 " %s: cmd %x, feat %x, nsect %x," 1826 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x," 1827 " head/dev %x\n", 1828 __func__, 1829 fis.command, 1830 fis.features, 1831 fis.sect_count, 1832 fis.lba_low, 1833 fis.lba_mid, 1834 fis.lba_hi, 1835 fis.device); 1836 1837 /* check for erase mode support during secure erase.*/ 1838 if ((fis.command == ATA_CMD_SEC_ERASE_UNIT) && outbuf && 1839 (outbuf[0] & MTIP_SEC_ERASE_MODE)) { 1840 erasemode = 1; 1841 } 1842 1843 mtip_set_timeout(dd, &fis, &timeout, erasemode); 1844 1845 /* Determine the correct transfer size.*/ 1846 if (force_single_sector) 1847 transfer_size = ATA_SECT_SIZE; 1848 else 1849 transfer_size = ATA_SECT_SIZE * fis.sect_count; 1850 1851 /* Execute the command.*/ 1852 if (mtip_exec_internal_command(dd->port, 1853 &fis, 1854 5, 1855 dma_buffer, 1856 transfer_size, 1857 0, 1858 timeout) < 0) { 1859 err = -EIO; 1860 goto abort; 1861 } 1862 1863 task_file_data = readl(dd->port->mmio+PORT_TFDATA); 1864 1865 if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) { 1866 reply = dd->port->rxfis + RX_FIS_PIO_SETUP; 1867 req_task->io_ports[7] = reply->control; 1868 } else { 1869 reply = dd->port->rxfis + RX_FIS_D2H_REG; 1870 req_task->io_ports[7] = reply->command; 1871 } 1872 1873 /* reclaim the DMA buffers.*/ 1874 if (inbuf_dma) 1875 dma_unmap_single(&dd->pdev->dev, inbuf_dma, taskin, 1876 DMA_FROM_DEVICE); 1877 if (outbuf_dma) 1878 dma_unmap_single(&dd->pdev->dev, outbuf_dma, taskout, 1879 DMA_TO_DEVICE); 1880 inbuf_dma = 0; 1881 outbuf_dma = 0; 1882 1883 /* return the ATA registers to the caller.*/ 1884 req_task->io_ports[1] = reply->features; 1885 req_task->io_ports[2] = reply->sect_count; 1886 req_task->io_ports[3] = reply->lba_low; 1887 req_task->io_ports[4] = reply->lba_mid; 1888 req_task->io_ports[5] = reply->lba_hi; 1889 req_task->io_ports[6] = reply->device; 1890 1891 if (req_task->out_flags.all & 1) { 1892 1893 req_task->hob_ports[3] = reply->lba_low_ex; 1894 req_task->hob_ports[4] = reply->lba_mid_ex; 1895 req_task->hob_ports[5] = reply->lba_hi_ex; 1896 req_task->hob_ports[1] = reply->features_ex; 1897 req_task->hob_ports[2] = reply->sect_cnt_ex; 1898 } 1899 dbg_printk(MTIP_DRV_NAME 1900 " %s: Completion: stat %x," 1901 "err %x, sect_cnt %x, lbalo %x," 1902 "lbamid %x, lbahi %x, dev %x\n", 1903 __func__, 1904 req_task->io_ports[7], 1905 req_task->io_ports[1], 1906 req_task->io_ports[2], 1907 req_task->io_ports[3], 1908 req_task->io_ports[4], 1909 req_task->io_ports[5], 1910 req_task->io_ports[6]); 1911 1912 if (taskout) { 1913 if (copy_to_user(buf + outtotal, outbuf, taskout)) { 1914 err = -EFAULT; 1915 goto abort; 1916 } 1917 } 1918 if (taskin) { 1919 if (copy_to_user(buf + intotal, inbuf, taskin)) { 1920 err = -EFAULT; 1921 goto abort; 1922 } 1923 } 1924 abort: 1925 if (inbuf_dma) 1926 dma_unmap_single(&dd->pdev->dev, inbuf_dma, taskin, 1927 DMA_FROM_DEVICE); 1928 if (outbuf_dma) 1929 dma_unmap_single(&dd->pdev->dev, outbuf_dma, taskout, 1930 DMA_TO_DEVICE); 1931 kfree(outbuf); 1932 kfree(inbuf); 1933 1934 return err; 1935 } 1936 1937 /* 1938 * Handle IOCTL calls from the Block Layer. 1939 * 1940 * This function is called by the Block Layer when it receives an IOCTL 1941 * command that it does not understand. If the IOCTL command is not supported 1942 * this function returns -ENOTTY. 1943 * 1944 * @dd Pointer to the driver data structure. 1945 * @cmd IOCTL command passed from the Block Layer. 1946 * @arg IOCTL argument passed from the Block Layer. 1947 * 1948 * return value 1949 * 0 The IOCTL completed successfully. 1950 * -ENOTTY The specified command is not supported. 1951 * -EFAULT An error occurred copying data to a user space buffer. 1952 * -EIO An error occurred while executing the command. 1953 */ 1954 static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd, 1955 unsigned long arg) 1956 { 1957 switch (cmd) { 1958 case HDIO_GET_IDENTITY: 1959 { 1960 if (copy_to_user((void __user *)arg, dd->port->identify, 1961 sizeof(u16) * ATA_ID_WORDS)) 1962 return -EFAULT; 1963 break; 1964 } 1965 case HDIO_DRIVE_CMD: 1966 { 1967 u8 drive_command[4]; 1968 1969 /* Copy the user command info to our buffer. */ 1970 if (copy_from_user(drive_command, 1971 (void __user *) arg, 1972 sizeof(drive_command))) 1973 return -EFAULT; 1974 1975 /* Execute the drive command. */ 1976 if (exec_drive_command(dd->port, 1977 drive_command, 1978 (void __user *) (arg+4))) 1979 return -EIO; 1980 1981 /* Copy the status back to the users buffer. */ 1982 if (copy_to_user((void __user *) arg, 1983 drive_command, 1984 sizeof(drive_command))) 1985 return -EFAULT; 1986 1987 break; 1988 } 1989 case HDIO_DRIVE_TASK: 1990 { 1991 u8 drive_command[7]; 1992 1993 /* Copy the user command info to our buffer. */ 1994 if (copy_from_user(drive_command, 1995 (void __user *) arg, 1996 sizeof(drive_command))) 1997 return -EFAULT; 1998 1999 /* Execute the drive command. */ 2000 if (exec_drive_task(dd->port, drive_command)) 2001 return -EIO; 2002 2003 /* Copy the status back to the users buffer. */ 2004 if (copy_to_user((void __user *) arg, 2005 drive_command, 2006 sizeof(drive_command))) 2007 return -EFAULT; 2008 2009 break; 2010 } 2011 case HDIO_DRIVE_TASKFILE: { 2012 ide_task_request_t req_task; 2013 int ret, outtotal; 2014 2015 if (copy_from_user(&req_task, (void __user *) arg, 2016 sizeof(req_task))) 2017 return -EFAULT; 2018 2019 outtotal = sizeof(req_task); 2020 2021 ret = exec_drive_taskfile(dd, (void __user *) arg, 2022 &req_task, outtotal); 2023 2024 if (copy_to_user((void __user *) arg, &req_task, 2025 sizeof(req_task))) 2026 return -EFAULT; 2027 2028 return ret; 2029 } 2030 2031 default: 2032 return -EINVAL; 2033 } 2034 return 0; 2035 } 2036 2037 /* 2038 * Submit an IO to the hw 2039 * 2040 * This function is called by the block layer to issue an io 2041 * to the device. Upon completion, the callback function will 2042 * be called with the data parameter passed as the callback data. 2043 * 2044 * @dd Pointer to the driver data structure. 2045 * @start First sector to read. 2046 * @nsect Number of sectors to read. 2047 * @tag The tag of this read command. 2048 * @callback Pointer to the function that should be called 2049 * when the read completes. 2050 * @data Callback data passed to the callback function 2051 * when the read completes. 2052 * @dir Direction (read or write) 2053 * 2054 * return value 2055 * None 2056 */ 2057 static void mtip_hw_submit_io(struct driver_data *dd, struct request *rq, 2058 struct mtip_cmd *command, 2059 struct blk_mq_hw_ctx *hctx) 2060 { 2061 struct mtip_cmd_hdr *hdr = 2062 dd->port->command_list + sizeof(struct mtip_cmd_hdr) * rq->tag; 2063 struct host_to_dev_fis *fis; 2064 struct mtip_port *port = dd->port; 2065 int dma_dir = rq_data_dir(rq) == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 2066 u64 start = blk_rq_pos(rq); 2067 unsigned int nsect = blk_rq_sectors(rq); 2068 unsigned int nents; 2069 2070 /* Map the scatter list for DMA access */ 2071 nents = blk_rq_map_sg(hctx->queue, rq, command->sg); 2072 nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir); 2073 2074 prefetch(&port->flags); 2075 2076 command->scatter_ents = nents; 2077 2078 /* 2079 * The number of retries for this command before it is 2080 * reported as a failure to the upper layers. 2081 */ 2082 command->retries = MTIP_MAX_RETRIES; 2083 2084 /* Fill out fis */ 2085 fis = command->command; 2086 fis->type = 0x27; 2087 fis->opts = 1 << 7; 2088 if (dma_dir == DMA_FROM_DEVICE) 2089 fis->command = ATA_CMD_FPDMA_READ; 2090 else 2091 fis->command = ATA_CMD_FPDMA_WRITE; 2092 fis->lba_low = start & 0xFF; 2093 fis->lba_mid = (start >> 8) & 0xFF; 2094 fis->lba_hi = (start >> 16) & 0xFF; 2095 fis->lba_low_ex = (start >> 24) & 0xFF; 2096 fis->lba_mid_ex = (start >> 32) & 0xFF; 2097 fis->lba_hi_ex = (start >> 40) & 0xFF; 2098 fis->device = 1 << 6; 2099 fis->features = nsect & 0xFF; 2100 fis->features_ex = (nsect >> 8) & 0xFF; 2101 fis->sect_count = ((rq->tag << 3) | (rq->tag >> 5)); 2102 fis->sect_cnt_ex = 0; 2103 fis->control = 0; 2104 fis->res2 = 0; 2105 fis->res3 = 0; 2106 fill_command_sg(dd, command, nents); 2107 2108 if (unlikely(command->unaligned)) 2109 fis->device |= 1 << 7; 2110 2111 /* Populate the command header */ 2112 hdr->ctba = cpu_to_le32(command->command_dma & 0xFFFFFFFF); 2113 if (test_bit(MTIP_PF_HOST_CAP_64, &dd->port->flags)) 2114 hdr->ctbau = cpu_to_le32((command->command_dma >> 16) >> 16); 2115 hdr->opts = cpu_to_le32((nents << 16) | 5 | AHCI_CMD_PREFETCH); 2116 hdr->byte_count = 0; 2117 2118 command->direction = dma_dir; 2119 2120 /* 2121 * To prevent this command from being issued 2122 * if an internal command is in progress or error handling is active. 2123 */ 2124 if (unlikely(port->flags & MTIP_PF_PAUSE_IO)) { 2125 set_bit(rq->tag, port->cmds_to_issue); 2126 set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); 2127 return; 2128 } 2129 2130 /* Issue the command to the hardware */ 2131 mtip_issue_ncq_command(port, rq->tag); 2132 } 2133 2134 /* 2135 * Sysfs status dump. 2136 * 2137 * @dev Pointer to the device structure, passed by the kernrel. 2138 * @attr Pointer to the device_attribute structure passed by the kernel. 2139 * @buf Pointer to the char buffer that will receive the stats info. 2140 * 2141 * return value 2142 * The size, in bytes, of the data copied into buf. 2143 */ 2144 static ssize_t mtip_hw_show_status(struct device *dev, 2145 struct device_attribute *attr, 2146 char *buf) 2147 { 2148 struct driver_data *dd = dev_to_disk(dev)->private_data; 2149 int size = 0; 2150 2151 if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag)) 2152 size += sprintf(buf, "%s", "thermal_shutdown\n"); 2153 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag)) 2154 size += sprintf(buf, "%s", "write_protect\n"); 2155 else 2156 size += sprintf(buf, "%s", "online\n"); 2157 2158 return size; 2159 } 2160 2161 static DEVICE_ATTR(status, 0444, mtip_hw_show_status, NULL); 2162 2163 static struct attribute *mtip_disk_attrs[] = { 2164 &dev_attr_status.attr, 2165 NULL, 2166 }; 2167 2168 static const struct attribute_group mtip_disk_attr_group = { 2169 .attrs = mtip_disk_attrs, 2170 }; 2171 2172 static const struct attribute_group *mtip_disk_attr_groups[] = { 2173 &mtip_disk_attr_group, 2174 NULL, 2175 }; 2176 2177 /* debugsfs entries */ 2178 2179 static ssize_t show_device_status(struct device_driver *drv, char *buf) 2180 { 2181 int size = 0; 2182 struct driver_data *dd, *tmp; 2183 unsigned long flags; 2184 char id_buf[42]; 2185 u16 status = 0; 2186 2187 spin_lock_irqsave(&dev_lock, flags); 2188 size += sprintf(&buf[size], "Devices Present:\n"); 2189 list_for_each_entry_safe(dd, tmp, &online_list, online_list) { 2190 if (dd->pdev) { 2191 if (dd->port && 2192 dd->port->identify && 2193 dd->port->identify_valid) { 2194 strlcpy(id_buf, 2195 (char *) (dd->port->identify + 10), 21); 2196 status = *(dd->port->identify + 141); 2197 } else { 2198 memset(id_buf, 0, 42); 2199 status = 0; 2200 } 2201 2202 if (dd->port && 2203 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) { 2204 size += sprintf(&buf[size], 2205 " device %s %s (ftl rebuild %d %%)\n", 2206 dev_name(&dd->pdev->dev), 2207 id_buf, 2208 status); 2209 } else { 2210 size += sprintf(&buf[size], 2211 " device %s %s\n", 2212 dev_name(&dd->pdev->dev), 2213 id_buf); 2214 } 2215 } 2216 } 2217 2218 size += sprintf(&buf[size], "Devices Being Removed:\n"); 2219 list_for_each_entry_safe(dd, tmp, &removing_list, remove_list) { 2220 if (dd->pdev) { 2221 if (dd->port && 2222 dd->port->identify && 2223 dd->port->identify_valid) { 2224 strlcpy(id_buf, 2225 (char *) (dd->port->identify+10), 21); 2226 status = *(dd->port->identify + 141); 2227 } else { 2228 memset(id_buf, 0, 42); 2229 status = 0; 2230 } 2231 2232 if (dd->port && 2233 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) { 2234 size += sprintf(&buf[size], 2235 " device %s %s (ftl rebuild %d %%)\n", 2236 dev_name(&dd->pdev->dev), 2237 id_buf, 2238 status); 2239 } else { 2240 size += sprintf(&buf[size], 2241 " device %s %s\n", 2242 dev_name(&dd->pdev->dev), 2243 id_buf); 2244 } 2245 } 2246 } 2247 spin_unlock_irqrestore(&dev_lock, flags); 2248 2249 return size; 2250 } 2251 2252 static ssize_t mtip_hw_read_device_status(struct file *f, char __user *ubuf, 2253 size_t len, loff_t *offset) 2254 { 2255 int size = *offset; 2256 char *buf; 2257 int rv = 0; 2258 2259 if (!len || *offset) 2260 return 0; 2261 2262 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); 2263 if (!buf) 2264 return -ENOMEM; 2265 2266 size += show_device_status(NULL, buf); 2267 2268 *offset = size <= len ? size : len; 2269 size = copy_to_user(ubuf, buf, *offset); 2270 if (size) 2271 rv = -EFAULT; 2272 2273 kfree(buf); 2274 return rv ? rv : *offset; 2275 } 2276 2277 static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf, 2278 size_t len, loff_t *offset) 2279 { 2280 struct driver_data *dd = (struct driver_data *)f->private_data; 2281 char *buf; 2282 u32 group_allocated; 2283 int size = *offset; 2284 int n, rv = 0; 2285 2286 if (!len || size) 2287 return 0; 2288 2289 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); 2290 if (!buf) 2291 return -ENOMEM; 2292 2293 size += sprintf(&buf[size], "H/ S ACTive : [ 0x"); 2294 2295 for (n = dd->slot_groups-1; n >= 0; n--) 2296 size += sprintf(&buf[size], "%08X ", 2297 readl(dd->port->s_active[n])); 2298 2299 size += sprintf(&buf[size], "]\n"); 2300 size += sprintf(&buf[size], "H/ Command Issue : [ 0x"); 2301 2302 for (n = dd->slot_groups-1; n >= 0; n--) 2303 size += sprintf(&buf[size], "%08X ", 2304 readl(dd->port->cmd_issue[n])); 2305 2306 size += sprintf(&buf[size], "]\n"); 2307 size += sprintf(&buf[size], "H/ Completed : [ 0x"); 2308 2309 for (n = dd->slot_groups-1; n >= 0; n--) 2310 size += sprintf(&buf[size], "%08X ", 2311 readl(dd->port->completed[n])); 2312 2313 size += sprintf(&buf[size], "]\n"); 2314 size += sprintf(&buf[size], "H/ PORT IRQ STAT : [ 0x%08X ]\n", 2315 readl(dd->port->mmio + PORT_IRQ_STAT)); 2316 size += sprintf(&buf[size], "H/ HOST IRQ STAT : [ 0x%08X ]\n", 2317 readl(dd->mmio + HOST_IRQ_STAT)); 2318 size += sprintf(&buf[size], "\n"); 2319 2320 size += sprintf(&buf[size], "L/ Commands in Q : [ 0x"); 2321 2322 for (n = dd->slot_groups-1; n >= 0; n--) { 2323 if (sizeof(long) > sizeof(u32)) 2324 group_allocated = 2325 dd->port->cmds_to_issue[n/2] >> (32*(n&1)); 2326 else 2327 group_allocated = dd->port->cmds_to_issue[n]; 2328 size += sprintf(&buf[size], "%08X ", group_allocated); 2329 } 2330 size += sprintf(&buf[size], "]\n"); 2331 2332 *offset = size <= len ? size : len; 2333 size = copy_to_user(ubuf, buf, *offset); 2334 if (size) 2335 rv = -EFAULT; 2336 2337 kfree(buf); 2338 return rv ? rv : *offset; 2339 } 2340 2341 static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf, 2342 size_t len, loff_t *offset) 2343 { 2344 struct driver_data *dd = (struct driver_data *)f->private_data; 2345 char *buf; 2346 int size = *offset; 2347 int rv = 0; 2348 2349 if (!len || size) 2350 return 0; 2351 2352 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); 2353 if (!buf) 2354 return -ENOMEM; 2355 2356 size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n", 2357 dd->port->flags); 2358 size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n", 2359 dd->dd_flag); 2360 2361 *offset = size <= len ? size : len; 2362 size = copy_to_user(ubuf, buf, *offset); 2363 if (size) 2364 rv = -EFAULT; 2365 2366 kfree(buf); 2367 return rv ? rv : *offset; 2368 } 2369 2370 static const struct file_operations mtip_device_status_fops = { 2371 .owner = THIS_MODULE, 2372 .open = simple_open, 2373 .read = mtip_hw_read_device_status, 2374 .llseek = no_llseek, 2375 }; 2376 2377 static const struct file_operations mtip_regs_fops = { 2378 .owner = THIS_MODULE, 2379 .open = simple_open, 2380 .read = mtip_hw_read_registers, 2381 .llseek = no_llseek, 2382 }; 2383 2384 static const struct file_operations mtip_flags_fops = { 2385 .owner = THIS_MODULE, 2386 .open = simple_open, 2387 .read = mtip_hw_read_flags, 2388 .llseek = no_llseek, 2389 }; 2390 2391 static int mtip_hw_debugfs_init(struct driver_data *dd) 2392 { 2393 if (!dfs_parent) 2394 return -1; 2395 2396 dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent); 2397 if (IS_ERR_OR_NULL(dd->dfs_node)) { 2398 dev_warn(&dd->pdev->dev, 2399 "Error creating node %s under debugfs\n", 2400 dd->disk->disk_name); 2401 dd->dfs_node = NULL; 2402 return -1; 2403 } 2404 2405 debugfs_create_file("flags", 0444, dd->dfs_node, dd, &mtip_flags_fops); 2406 debugfs_create_file("registers", 0444, dd->dfs_node, dd, 2407 &mtip_regs_fops); 2408 2409 return 0; 2410 } 2411 2412 static void mtip_hw_debugfs_exit(struct driver_data *dd) 2413 { 2414 debugfs_remove_recursive(dd->dfs_node); 2415 } 2416 2417 /* 2418 * Perform any init/resume time hardware setup 2419 * 2420 * @dd Pointer to the driver data structure. 2421 * 2422 * return value 2423 * None 2424 */ 2425 static inline void hba_setup(struct driver_data *dd) 2426 { 2427 u32 hwdata; 2428 hwdata = readl(dd->mmio + HOST_HSORG); 2429 2430 /* interrupt bug workaround: use only 1 IS bit.*/ 2431 writel(hwdata | 2432 HSORG_DISABLE_SLOTGRP_INTR | 2433 HSORG_DISABLE_SLOTGRP_PXIS, 2434 dd->mmio + HOST_HSORG); 2435 } 2436 2437 static int mtip_device_unaligned_constrained(struct driver_data *dd) 2438 { 2439 return (dd->pdev->device == P420M_DEVICE_ID ? 1 : 0); 2440 } 2441 2442 /* 2443 * Detect the details of the product, and store anything needed 2444 * into the driver data structure. This includes product type and 2445 * version and number of slot groups. 2446 * 2447 * @dd Pointer to the driver data structure. 2448 * 2449 * return value 2450 * None 2451 */ 2452 static void mtip_detect_product(struct driver_data *dd) 2453 { 2454 u32 hwdata; 2455 unsigned int rev, slotgroups; 2456 2457 /* 2458 * HBA base + 0xFC [15:0] - vendor-specific hardware interface 2459 * info register: 2460 * [15:8] hardware/software interface rev# 2461 * [ 3] asic-style interface 2462 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style). 2463 */ 2464 hwdata = readl(dd->mmio + HOST_HSORG); 2465 2466 dd->product_type = MTIP_PRODUCT_UNKNOWN; 2467 dd->slot_groups = 1; 2468 2469 if (hwdata & 0x8) { 2470 dd->product_type = MTIP_PRODUCT_ASICFPGA; 2471 rev = (hwdata & HSORG_HWREV) >> 8; 2472 slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1; 2473 dev_info(&dd->pdev->dev, 2474 "ASIC-FPGA design, HS rev 0x%x, " 2475 "%i slot groups [%i slots]\n", 2476 rev, 2477 slotgroups, 2478 slotgroups * 32); 2479 2480 if (slotgroups > MTIP_MAX_SLOT_GROUPS) { 2481 dev_warn(&dd->pdev->dev, 2482 "Warning: driver only supports " 2483 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS); 2484 slotgroups = MTIP_MAX_SLOT_GROUPS; 2485 } 2486 dd->slot_groups = slotgroups; 2487 return; 2488 } 2489 2490 dev_warn(&dd->pdev->dev, "Unrecognized product id\n"); 2491 } 2492 2493 /* 2494 * Blocking wait for FTL rebuild to complete 2495 * 2496 * @dd Pointer to the DRIVER_DATA structure. 2497 * 2498 * return value 2499 * 0 FTL rebuild completed successfully 2500 * -EFAULT FTL rebuild error/timeout/interruption 2501 */ 2502 static int mtip_ftl_rebuild_poll(struct driver_data *dd) 2503 { 2504 unsigned long timeout, cnt = 0, start; 2505 2506 dev_warn(&dd->pdev->dev, 2507 "FTL rebuild in progress. Polling for completion.\n"); 2508 2509 start = jiffies; 2510 timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS); 2511 2512 do { 2513 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, 2514 &dd->dd_flag))) 2515 return -EFAULT; 2516 if (mtip_check_surprise_removal(dd->pdev)) 2517 return -EFAULT; 2518 2519 if (mtip_get_identify(dd->port, NULL) < 0) 2520 return -EFAULT; 2521 2522 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == 2523 MTIP_FTL_REBUILD_MAGIC) { 2524 ssleep(1); 2525 /* Print message every 3 minutes */ 2526 if (cnt++ >= 180) { 2527 dev_warn(&dd->pdev->dev, 2528 "FTL rebuild in progress (%d secs).\n", 2529 jiffies_to_msecs(jiffies - start) / 1000); 2530 cnt = 0; 2531 } 2532 } else { 2533 dev_warn(&dd->pdev->dev, 2534 "FTL rebuild complete (%d secs).\n", 2535 jiffies_to_msecs(jiffies - start) / 1000); 2536 mtip_block_initialize(dd); 2537 return 0; 2538 } 2539 } while (time_before(jiffies, timeout)); 2540 2541 /* Check for timeout */ 2542 dev_err(&dd->pdev->dev, 2543 "Timed out waiting for FTL rebuild to complete (%d secs).\n", 2544 jiffies_to_msecs(jiffies - start) / 1000); 2545 return -EFAULT; 2546 } 2547 2548 static void mtip_softirq_done_fn(struct request *rq) 2549 { 2550 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 2551 struct driver_data *dd = rq->q->queuedata; 2552 2553 /* Unmap the DMA scatter list entries */ 2554 dma_unmap_sg(&dd->pdev->dev, cmd->sg, cmd->scatter_ents, 2555 cmd->direction); 2556 2557 if (unlikely(cmd->unaligned)) 2558 atomic_inc(&dd->port->cmd_slot_unal); 2559 2560 blk_mq_end_request(rq, cmd->status); 2561 } 2562 2563 static bool mtip_abort_cmd(struct request *req, void *data, bool reserved) 2564 { 2565 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req); 2566 struct driver_data *dd = data; 2567 2568 dbg_printk(MTIP_DRV_NAME " Aborting request, tag = %d\n", req->tag); 2569 2570 clear_bit(req->tag, dd->port->cmds_to_issue); 2571 cmd->status = BLK_STS_IOERR; 2572 mtip_softirq_done_fn(req); 2573 return true; 2574 } 2575 2576 static bool mtip_queue_cmd(struct request *req, void *data, bool reserved) 2577 { 2578 struct driver_data *dd = data; 2579 2580 set_bit(req->tag, dd->port->cmds_to_issue); 2581 blk_abort_request(req); 2582 return true; 2583 } 2584 2585 /* 2586 * service thread to issue queued commands 2587 * 2588 * @data Pointer to the driver data structure. 2589 * 2590 * return value 2591 * 0 2592 */ 2593 2594 static int mtip_service_thread(void *data) 2595 { 2596 struct driver_data *dd = (struct driver_data *)data; 2597 unsigned long slot, slot_start, slot_wrap, to; 2598 unsigned int num_cmd_slots = dd->slot_groups * 32; 2599 struct mtip_port *port = dd->port; 2600 2601 while (1) { 2602 if (kthread_should_stop() || 2603 test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags)) 2604 goto st_out; 2605 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); 2606 2607 /* 2608 * the condition is to check neither an internal command is 2609 * is in progress nor error handling is active 2610 */ 2611 wait_event_interruptible(port->svc_wait, (port->flags) && 2612 (port->flags & MTIP_PF_SVC_THD_WORK)); 2613 2614 if (kthread_should_stop() || 2615 test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags)) 2616 goto st_out; 2617 2618 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, 2619 &dd->dd_flag))) 2620 goto st_out; 2621 2622 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); 2623 2624 restart_eh: 2625 /* Demux bits: start with error handling */ 2626 if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) { 2627 mtip_handle_tfe(dd); 2628 clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); 2629 } 2630 2631 if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) 2632 goto restart_eh; 2633 2634 if (test_bit(MTIP_PF_TO_ACTIVE_BIT, &port->flags)) { 2635 to = jiffies + msecs_to_jiffies(5000); 2636 2637 do { 2638 mdelay(100); 2639 } while (atomic_read(&dd->irq_workers_active) != 0 && 2640 time_before(jiffies, to)); 2641 2642 if (atomic_read(&dd->irq_workers_active) != 0) 2643 dev_warn(&dd->pdev->dev, 2644 "Completion workers still active!"); 2645 2646 blk_mq_quiesce_queue(dd->queue); 2647 2648 blk_mq_tagset_busy_iter(&dd->tags, mtip_queue_cmd, dd); 2649 2650 set_bit(MTIP_PF_ISSUE_CMDS_BIT, &dd->port->flags); 2651 2652 if (mtip_device_reset(dd)) 2653 blk_mq_tagset_busy_iter(&dd->tags, 2654 mtip_abort_cmd, dd); 2655 2656 clear_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags); 2657 2658 blk_mq_unquiesce_queue(dd->queue); 2659 } 2660 2661 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { 2662 slot = 1; 2663 /* used to restrict the loop to one iteration */ 2664 slot_start = num_cmd_slots; 2665 slot_wrap = 0; 2666 while (1) { 2667 slot = find_next_bit(port->cmds_to_issue, 2668 num_cmd_slots, slot); 2669 if (slot_wrap == 1) { 2670 if ((slot_start >= slot) || 2671 (slot >= num_cmd_slots)) 2672 break; 2673 } 2674 if (unlikely(slot_start == num_cmd_slots)) 2675 slot_start = slot; 2676 2677 if (unlikely(slot == num_cmd_slots)) { 2678 slot = 1; 2679 slot_wrap = 1; 2680 continue; 2681 } 2682 2683 /* Issue the command to the hardware */ 2684 mtip_issue_ncq_command(port, slot); 2685 2686 clear_bit(slot, port->cmds_to_issue); 2687 } 2688 2689 clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); 2690 } 2691 2692 if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) { 2693 if (mtip_ftl_rebuild_poll(dd) == 0) 2694 clear_bit(MTIP_PF_REBUILD_BIT, &port->flags); 2695 } 2696 } 2697 2698 st_out: 2699 return 0; 2700 } 2701 2702 /* 2703 * DMA region teardown 2704 * 2705 * @dd Pointer to driver_data structure 2706 * 2707 * return value 2708 * None 2709 */ 2710 static void mtip_dma_free(struct driver_data *dd) 2711 { 2712 struct mtip_port *port = dd->port; 2713 2714 if (port->block1) 2715 dma_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ, 2716 port->block1, port->block1_dma); 2717 2718 if (port->command_list) { 2719 dma_free_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ, 2720 port->command_list, port->command_list_dma); 2721 } 2722 } 2723 2724 /* 2725 * DMA region setup 2726 * 2727 * @dd Pointer to driver_data structure 2728 * 2729 * return value 2730 * -ENOMEM Not enough free DMA region space to initialize driver 2731 */ 2732 static int mtip_dma_alloc(struct driver_data *dd) 2733 { 2734 struct mtip_port *port = dd->port; 2735 2736 /* Allocate dma memory for RX Fis, Identify, and Sector Bufffer */ 2737 port->block1 = 2738 dma_alloc_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ, 2739 &port->block1_dma, GFP_KERNEL); 2740 if (!port->block1) 2741 return -ENOMEM; 2742 2743 /* Allocate dma memory for command list */ 2744 port->command_list = 2745 dma_alloc_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ, 2746 &port->command_list_dma, GFP_KERNEL); 2747 if (!port->command_list) { 2748 dma_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ, 2749 port->block1, port->block1_dma); 2750 port->block1 = NULL; 2751 port->block1_dma = 0; 2752 return -ENOMEM; 2753 } 2754 2755 /* Setup all pointers into first DMA region */ 2756 port->rxfis = port->block1 + AHCI_RX_FIS_OFFSET; 2757 port->rxfis_dma = port->block1_dma + AHCI_RX_FIS_OFFSET; 2758 port->identify = port->block1 + AHCI_IDFY_OFFSET; 2759 port->identify_dma = port->block1_dma + AHCI_IDFY_OFFSET; 2760 port->log_buf = port->block1 + AHCI_SECTBUF_OFFSET; 2761 port->log_buf_dma = port->block1_dma + AHCI_SECTBUF_OFFSET; 2762 port->smart_buf = port->block1 + AHCI_SMARTBUF_OFFSET; 2763 port->smart_buf_dma = port->block1_dma + AHCI_SMARTBUF_OFFSET; 2764 2765 return 0; 2766 } 2767 2768 static int mtip_hw_get_identify(struct driver_data *dd) 2769 { 2770 struct smart_attr attr242; 2771 unsigned char *buf; 2772 int rv; 2773 2774 if (mtip_get_identify(dd->port, NULL) < 0) 2775 return -EFAULT; 2776 2777 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == 2778 MTIP_FTL_REBUILD_MAGIC) { 2779 set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags); 2780 return MTIP_FTL_REBUILD_MAGIC; 2781 } 2782 mtip_dump_identify(dd->port); 2783 2784 /* check write protect, over temp and rebuild statuses */ 2785 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, 2786 dd->port->log_buf, 2787 dd->port->log_buf_dma, 1); 2788 if (rv) { 2789 dev_warn(&dd->pdev->dev, 2790 "Error in READ LOG EXT (10h) command\n"); 2791 /* non-critical error, don't fail the load */ 2792 } else { 2793 buf = (unsigned char *)dd->port->log_buf; 2794 if (buf[259] & 0x1) { 2795 dev_info(&dd->pdev->dev, 2796 "Write protect bit is set.\n"); 2797 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); 2798 } 2799 if (buf[288] == 0xF7) { 2800 dev_info(&dd->pdev->dev, 2801 "Exceeded Tmax, drive in thermal shutdown.\n"); 2802 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); 2803 } 2804 if (buf[288] == 0xBF) { 2805 dev_info(&dd->pdev->dev, 2806 "Drive indicates rebuild has failed.\n"); 2807 set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag); 2808 } 2809 } 2810 2811 /* get write protect progess */ 2812 memset(&attr242, 0, sizeof(struct smart_attr)); 2813 if (mtip_get_smart_attr(dd->port, 242, &attr242)) 2814 dev_warn(&dd->pdev->dev, 2815 "Unable to check write protect progress\n"); 2816 else 2817 dev_info(&dd->pdev->dev, 2818 "Write protect progress: %u%% (%u blocks)\n", 2819 attr242.cur, le32_to_cpu(attr242.data)); 2820 2821 return rv; 2822 } 2823 2824 /* 2825 * Called once for each card. 2826 * 2827 * @dd Pointer to the driver data structure. 2828 * 2829 * return value 2830 * 0 on success, else an error code. 2831 */ 2832 static int mtip_hw_init(struct driver_data *dd) 2833 { 2834 int i; 2835 int rv; 2836 unsigned long timeout, timetaken; 2837 2838 dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR]; 2839 2840 mtip_detect_product(dd); 2841 if (dd->product_type == MTIP_PRODUCT_UNKNOWN) { 2842 rv = -EIO; 2843 goto out1; 2844 } 2845 2846 hba_setup(dd); 2847 2848 dd->port = kzalloc_node(sizeof(struct mtip_port), GFP_KERNEL, 2849 dd->numa_node); 2850 if (!dd->port) 2851 return -ENOMEM; 2852 2853 /* Continue workqueue setup */ 2854 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++) 2855 dd->work[i].port = dd->port; 2856 2857 /* Enable unaligned IO constraints for some devices */ 2858 if (mtip_device_unaligned_constrained(dd)) 2859 dd->unal_qdepth = MTIP_MAX_UNALIGNED_SLOTS; 2860 else 2861 dd->unal_qdepth = 0; 2862 2863 atomic_set(&dd->port->cmd_slot_unal, dd->unal_qdepth); 2864 2865 /* Spinlock to prevent concurrent issue */ 2866 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++) 2867 spin_lock_init(&dd->port->cmd_issue_lock[i]); 2868 2869 /* Set the port mmio base address. */ 2870 dd->port->mmio = dd->mmio + PORT_OFFSET; 2871 dd->port->dd = dd; 2872 2873 /* DMA allocations */ 2874 rv = mtip_dma_alloc(dd); 2875 if (rv < 0) 2876 goto out1; 2877 2878 /* Setup the pointers to the extended s_active and CI registers. */ 2879 for (i = 0; i < dd->slot_groups; i++) { 2880 dd->port->s_active[i] = 2881 dd->port->mmio + i*0x80 + PORT_SCR_ACT; 2882 dd->port->cmd_issue[i] = 2883 dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE; 2884 dd->port->completed[i] = 2885 dd->port->mmio + i*0x80 + PORT_SDBV; 2886 } 2887 2888 timetaken = jiffies; 2889 timeout = jiffies + msecs_to_jiffies(30000); 2890 while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) && 2891 time_before(jiffies, timeout)) { 2892 mdelay(100); 2893 } 2894 if (unlikely(mtip_check_surprise_removal(dd->pdev))) { 2895 timetaken = jiffies - timetaken; 2896 dev_warn(&dd->pdev->dev, 2897 "Surprise removal detected at %u ms\n", 2898 jiffies_to_msecs(timetaken)); 2899 rv = -ENODEV; 2900 goto out2 ; 2901 } 2902 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) { 2903 timetaken = jiffies - timetaken; 2904 dev_warn(&dd->pdev->dev, 2905 "Removal detected at %u ms\n", 2906 jiffies_to_msecs(timetaken)); 2907 rv = -EFAULT; 2908 goto out2; 2909 } 2910 2911 /* Conditionally reset the HBA. */ 2912 if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) { 2913 if (mtip_hba_reset(dd) < 0) { 2914 dev_err(&dd->pdev->dev, 2915 "Card did not reset within timeout\n"); 2916 rv = -EIO; 2917 goto out2; 2918 } 2919 } else { 2920 /* Clear any pending interrupts on the HBA */ 2921 writel(readl(dd->mmio + HOST_IRQ_STAT), 2922 dd->mmio + HOST_IRQ_STAT); 2923 } 2924 2925 mtip_init_port(dd->port); 2926 mtip_start_port(dd->port); 2927 2928 /* Setup the ISR and enable interrupts. */ 2929 rv = request_irq(dd->pdev->irq, mtip_irq_handler, IRQF_SHARED, 2930 dev_driver_string(&dd->pdev->dev), dd); 2931 if (rv) { 2932 dev_err(&dd->pdev->dev, 2933 "Unable to allocate IRQ %d\n", dd->pdev->irq); 2934 goto out2; 2935 } 2936 irq_set_affinity_hint(dd->pdev->irq, get_cpu_mask(dd->isr_binding)); 2937 2938 /* Enable interrupts on the HBA. */ 2939 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, 2940 dd->mmio + HOST_CTL); 2941 2942 init_waitqueue_head(&dd->port->svc_wait); 2943 2944 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) { 2945 rv = -EFAULT; 2946 goto out3; 2947 } 2948 2949 return rv; 2950 2951 out3: 2952 /* Disable interrupts on the HBA. */ 2953 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, 2954 dd->mmio + HOST_CTL); 2955 2956 /* Release the IRQ. */ 2957 irq_set_affinity_hint(dd->pdev->irq, NULL); 2958 free_irq(dd->pdev->irq, dd); 2959 2960 out2: 2961 mtip_deinit_port(dd->port); 2962 mtip_dma_free(dd); 2963 2964 out1: 2965 /* Free the memory allocated for the for structure. */ 2966 kfree(dd->port); 2967 2968 return rv; 2969 } 2970 2971 static int mtip_standby_drive(struct driver_data *dd) 2972 { 2973 int rv = 0; 2974 2975 if (dd->sr || !dd->port) 2976 return -ENODEV; 2977 /* 2978 * Send standby immediate (E0h) to the drive so that it 2979 * saves its state. 2980 */ 2981 if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags) && 2982 !test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag) && 2983 !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) { 2984 rv = mtip_standby_immediate(dd->port); 2985 if (rv) 2986 dev_warn(&dd->pdev->dev, 2987 "STANDBY IMMEDIATE failed\n"); 2988 } 2989 return rv; 2990 } 2991 2992 /* 2993 * Called to deinitialize an interface. 2994 * 2995 * @dd Pointer to the driver data structure. 2996 * 2997 * return value 2998 * 0 2999 */ 3000 static int mtip_hw_exit(struct driver_data *dd) 3001 { 3002 if (!dd->sr) { 3003 /* de-initialize the port. */ 3004 mtip_deinit_port(dd->port); 3005 3006 /* Disable interrupts on the HBA. */ 3007 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, 3008 dd->mmio + HOST_CTL); 3009 } 3010 3011 /* Release the IRQ. */ 3012 irq_set_affinity_hint(dd->pdev->irq, NULL); 3013 free_irq(dd->pdev->irq, dd); 3014 msleep(1000); 3015 3016 /* Free dma regions */ 3017 mtip_dma_free(dd); 3018 3019 /* Free the memory allocated for the for structure. */ 3020 kfree(dd->port); 3021 dd->port = NULL; 3022 3023 return 0; 3024 } 3025 3026 /* 3027 * Issue a Standby Immediate command to the device. 3028 * 3029 * This function is called by the Block Layer just before the 3030 * system powers off during a shutdown. 3031 * 3032 * @dd Pointer to the driver data structure. 3033 * 3034 * return value 3035 * 0 3036 */ 3037 static int mtip_hw_shutdown(struct driver_data *dd) 3038 { 3039 /* 3040 * Send standby immediate (E0h) to the drive so that it 3041 * saves its state. 3042 */ 3043 mtip_standby_drive(dd); 3044 3045 return 0; 3046 } 3047 3048 /* 3049 * Suspend function 3050 * 3051 * This function is called by the Block Layer just before the 3052 * system hibernates. 3053 * 3054 * @dd Pointer to the driver data structure. 3055 * 3056 * return value 3057 * 0 Suspend was successful 3058 * -EFAULT Suspend was not successful 3059 */ 3060 static int mtip_hw_suspend(struct driver_data *dd) 3061 { 3062 /* 3063 * Send standby immediate (E0h) to the drive 3064 * so that it saves its state. 3065 */ 3066 if (mtip_standby_drive(dd) != 0) { 3067 dev_err(&dd->pdev->dev, 3068 "Failed standby-immediate command\n"); 3069 return -EFAULT; 3070 } 3071 3072 /* Disable interrupts on the HBA.*/ 3073 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, 3074 dd->mmio + HOST_CTL); 3075 mtip_deinit_port(dd->port); 3076 3077 return 0; 3078 } 3079 3080 /* 3081 * Resume function 3082 * 3083 * This function is called by the Block Layer as the 3084 * system resumes. 3085 * 3086 * @dd Pointer to the driver data structure. 3087 * 3088 * return value 3089 * 0 Resume was successful 3090 * -EFAULT Resume was not successful 3091 */ 3092 static int mtip_hw_resume(struct driver_data *dd) 3093 { 3094 /* Perform any needed hardware setup steps */ 3095 hba_setup(dd); 3096 3097 /* Reset the HBA */ 3098 if (mtip_hba_reset(dd) != 0) { 3099 dev_err(&dd->pdev->dev, 3100 "Unable to reset the HBA\n"); 3101 return -EFAULT; 3102 } 3103 3104 /* 3105 * Enable the port, DMA engine, and FIS reception specific 3106 * h/w in controller. 3107 */ 3108 mtip_init_port(dd->port); 3109 mtip_start_port(dd->port); 3110 3111 /* Enable interrupts on the HBA.*/ 3112 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, 3113 dd->mmio + HOST_CTL); 3114 3115 return 0; 3116 } 3117 3118 /* 3119 * Helper function for reusing disk name 3120 * upon hot insertion. 3121 */ 3122 static int rssd_disk_name_format(char *prefix, 3123 int index, 3124 char *buf, 3125 int buflen) 3126 { 3127 const int base = 'z' - 'a' + 1; 3128 char *begin = buf + strlen(prefix); 3129 char *end = buf + buflen; 3130 char *p; 3131 int unit; 3132 3133 p = end - 1; 3134 *p = '\0'; 3135 unit = base; 3136 do { 3137 if (p == begin) 3138 return -EINVAL; 3139 *--p = 'a' + (index % unit); 3140 index = (index / unit) - 1; 3141 } while (index >= 0); 3142 3143 memmove(begin, p, end - p); 3144 memcpy(buf, prefix, strlen(prefix)); 3145 3146 return 0; 3147 } 3148 3149 /* 3150 * Block layer IOCTL handler. 3151 * 3152 * @dev Pointer to the block_device structure. 3153 * @mode ignored 3154 * @cmd IOCTL command passed from the user application. 3155 * @arg Argument passed from the user application. 3156 * 3157 * return value 3158 * 0 IOCTL completed successfully. 3159 * -ENOTTY IOCTL not supported or invalid driver data 3160 * structure pointer. 3161 */ 3162 static int mtip_block_ioctl(struct block_device *dev, 3163 fmode_t mode, 3164 unsigned cmd, 3165 unsigned long arg) 3166 { 3167 struct driver_data *dd = dev->bd_disk->private_data; 3168 3169 if (!capable(CAP_SYS_ADMIN)) 3170 return -EACCES; 3171 3172 if (!dd) 3173 return -ENOTTY; 3174 3175 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) 3176 return -ENOTTY; 3177 3178 switch (cmd) { 3179 case BLKFLSBUF: 3180 return -ENOTTY; 3181 default: 3182 return mtip_hw_ioctl(dd, cmd, arg); 3183 } 3184 } 3185 3186 #ifdef CONFIG_COMPAT 3187 /* 3188 * Block layer compat IOCTL handler. 3189 * 3190 * @dev Pointer to the block_device structure. 3191 * @mode ignored 3192 * @cmd IOCTL command passed from the user application. 3193 * @arg Argument passed from the user application. 3194 * 3195 * return value 3196 * 0 IOCTL completed successfully. 3197 * -ENOTTY IOCTL not supported or invalid driver data 3198 * structure pointer. 3199 */ 3200 static int mtip_block_compat_ioctl(struct block_device *dev, 3201 fmode_t mode, 3202 unsigned cmd, 3203 unsigned long arg) 3204 { 3205 struct driver_data *dd = dev->bd_disk->private_data; 3206 3207 if (!capable(CAP_SYS_ADMIN)) 3208 return -EACCES; 3209 3210 if (!dd) 3211 return -ENOTTY; 3212 3213 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) 3214 return -ENOTTY; 3215 3216 switch (cmd) { 3217 case BLKFLSBUF: 3218 return -ENOTTY; 3219 case HDIO_DRIVE_TASKFILE: { 3220 struct mtip_compat_ide_task_request_s __user *compat_req_task; 3221 ide_task_request_t req_task; 3222 int compat_tasksize, outtotal, ret; 3223 3224 compat_tasksize = 3225 sizeof(struct mtip_compat_ide_task_request_s); 3226 3227 compat_req_task = 3228 (struct mtip_compat_ide_task_request_s __user *) arg; 3229 3230 if (copy_from_user(&req_task, (void __user *) arg, 3231 compat_tasksize - (2 * sizeof(compat_long_t)))) 3232 return -EFAULT; 3233 3234 if (get_user(req_task.out_size, &compat_req_task->out_size)) 3235 return -EFAULT; 3236 3237 if (get_user(req_task.in_size, &compat_req_task->in_size)) 3238 return -EFAULT; 3239 3240 outtotal = sizeof(struct mtip_compat_ide_task_request_s); 3241 3242 ret = exec_drive_taskfile(dd, (void __user *) arg, 3243 &req_task, outtotal); 3244 3245 if (copy_to_user((void __user *) arg, &req_task, 3246 compat_tasksize - 3247 (2 * sizeof(compat_long_t)))) 3248 return -EFAULT; 3249 3250 if (put_user(req_task.out_size, &compat_req_task->out_size)) 3251 return -EFAULT; 3252 3253 if (put_user(req_task.in_size, &compat_req_task->in_size)) 3254 return -EFAULT; 3255 3256 return ret; 3257 } 3258 default: 3259 return mtip_hw_ioctl(dd, cmd, arg); 3260 } 3261 } 3262 #endif 3263 3264 /* 3265 * Obtain the geometry of the device. 3266 * 3267 * You may think that this function is obsolete, but some applications, 3268 * fdisk for example still used CHS values. This function describes the 3269 * device as having 224 heads and 56 sectors per cylinder. These values are 3270 * chosen so that each cylinder is aligned on a 4KB boundary. Since a 3271 * partition is described in terms of a start and end cylinder this means 3272 * that each partition is also 4KB aligned. Non-aligned partitions adversely 3273 * affects performance. 3274 * 3275 * @dev Pointer to the block_device strucutre. 3276 * @geo Pointer to a hd_geometry structure. 3277 * 3278 * return value 3279 * 0 Operation completed successfully. 3280 * -ENOTTY An error occurred while reading the drive capacity. 3281 */ 3282 static int mtip_block_getgeo(struct block_device *dev, 3283 struct hd_geometry *geo) 3284 { 3285 struct driver_data *dd = dev->bd_disk->private_data; 3286 sector_t capacity; 3287 3288 if (!dd) 3289 return -ENOTTY; 3290 3291 if (!(mtip_hw_get_capacity(dd, &capacity))) { 3292 dev_warn(&dd->pdev->dev, 3293 "Could not get drive capacity.\n"); 3294 return -ENOTTY; 3295 } 3296 3297 geo->heads = 224; 3298 geo->sectors = 56; 3299 sector_div(capacity, (geo->heads * geo->sectors)); 3300 geo->cylinders = capacity; 3301 return 0; 3302 } 3303 3304 static int mtip_block_open(struct block_device *dev, fmode_t mode) 3305 { 3306 struct driver_data *dd; 3307 3308 if (dev && dev->bd_disk) { 3309 dd = (struct driver_data *) dev->bd_disk->private_data; 3310 3311 if (dd) { 3312 if (test_bit(MTIP_DDF_REMOVAL_BIT, 3313 &dd->dd_flag)) { 3314 return -ENODEV; 3315 } 3316 return 0; 3317 } 3318 } 3319 return -ENODEV; 3320 } 3321 3322 static void mtip_block_release(struct gendisk *disk, fmode_t mode) 3323 { 3324 } 3325 3326 /* 3327 * Block device operation function. 3328 * 3329 * This structure contains pointers to the functions required by the block 3330 * layer. 3331 */ 3332 static const struct block_device_operations mtip_block_ops = { 3333 .open = mtip_block_open, 3334 .release = mtip_block_release, 3335 .ioctl = mtip_block_ioctl, 3336 #ifdef CONFIG_COMPAT 3337 .compat_ioctl = mtip_block_compat_ioctl, 3338 #endif 3339 .getgeo = mtip_block_getgeo, 3340 .owner = THIS_MODULE 3341 }; 3342 3343 static inline bool is_se_active(struct driver_data *dd) 3344 { 3345 if (unlikely(test_bit(MTIP_PF_SE_ACTIVE_BIT, &dd->port->flags))) { 3346 if (dd->port->ic_pause_timer) { 3347 unsigned long to = dd->port->ic_pause_timer + 3348 msecs_to_jiffies(1000); 3349 if (time_after(jiffies, to)) { 3350 clear_bit(MTIP_PF_SE_ACTIVE_BIT, 3351 &dd->port->flags); 3352 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag); 3353 dd->port->ic_pause_timer = 0; 3354 wake_up_interruptible(&dd->port->svc_wait); 3355 return false; 3356 } 3357 } 3358 return true; 3359 } 3360 return false; 3361 } 3362 3363 static inline bool is_stopped(struct driver_data *dd, struct request *rq) 3364 { 3365 if (likely(!(dd->dd_flag & MTIP_DDF_STOP_IO))) 3366 return false; 3367 3368 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) 3369 return true; 3370 if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag)) 3371 return true; 3372 if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag) && 3373 rq_data_dir(rq)) 3374 return true; 3375 if (test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) 3376 return true; 3377 if (test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)) 3378 return true; 3379 3380 return false; 3381 } 3382 3383 static bool mtip_check_unal_depth(struct blk_mq_hw_ctx *hctx, 3384 struct request *rq) 3385 { 3386 struct driver_data *dd = hctx->queue->queuedata; 3387 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3388 3389 if (rq_data_dir(rq) == READ || !dd->unal_qdepth) 3390 return false; 3391 3392 /* 3393 * If unaligned depth must be limited on this controller, mark it 3394 * as unaligned if the IO isn't on a 4k boundary (start of length). 3395 */ 3396 if (blk_rq_sectors(rq) <= 64) { 3397 if ((blk_rq_pos(rq) & 7) || (blk_rq_sectors(rq) & 7)) 3398 cmd->unaligned = 1; 3399 } 3400 3401 if (cmd->unaligned && atomic_dec_if_positive(&dd->port->cmd_slot_unal) >= 0) 3402 return true; 3403 3404 return false; 3405 } 3406 3407 static blk_status_t mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx, 3408 struct request *rq) 3409 { 3410 struct driver_data *dd = hctx->queue->queuedata; 3411 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3412 struct mtip_int_cmd *icmd = cmd->icmd; 3413 struct mtip_cmd_hdr *hdr = 3414 dd->port->command_list + sizeof(struct mtip_cmd_hdr) * rq->tag; 3415 struct mtip_cmd_sg *command_sg; 3416 3417 if (mtip_commands_active(dd->port)) 3418 return BLK_STS_DEV_RESOURCE; 3419 3420 hdr->ctba = cpu_to_le32(cmd->command_dma & 0xFFFFFFFF); 3421 if (test_bit(MTIP_PF_HOST_CAP_64, &dd->port->flags)) 3422 hdr->ctbau = cpu_to_le32((cmd->command_dma >> 16) >> 16); 3423 /* Populate the SG list */ 3424 hdr->opts = cpu_to_le32(icmd->opts | icmd->fis_len); 3425 if (icmd->buf_len) { 3426 command_sg = cmd->command + AHCI_CMD_TBL_HDR_SZ; 3427 3428 command_sg->info = cpu_to_le32((icmd->buf_len-1) & 0x3FFFFF); 3429 command_sg->dba = cpu_to_le32(icmd->buffer & 0xFFFFFFFF); 3430 command_sg->dba_upper = 3431 cpu_to_le32((icmd->buffer >> 16) >> 16); 3432 3433 hdr->opts |= cpu_to_le32((1 << 16)); 3434 } 3435 3436 /* Populate the command header */ 3437 hdr->byte_count = 0; 3438 3439 blk_mq_start_request(rq); 3440 mtip_issue_non_ncq_command(dd->port, rq->tag); 3441 return 0; 3442 } 3443 3444 static blk_status_t mtip_queue_rq(struct blk_mq_hw_ctx *hctx, 3445 const struct blk_mq_queue_data *bd) 3446 { 3447 struct driver_data *dd = hctx->queue->queuedata; 3448 struct request *rq = bd->rq; 3449 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3450 3451 if (blk_rq_is_passthrough(rq)) 3452 return mtip_issue_reserved_cmd(hctx, rq); 3453 3454 if (unlikely(mtip_check_unal_depth(hctx, rq))) 3455 return BLK_STS_DEV_RESOURCE; 3456 3457 if (is_se_active(dd) || is_stopped(dd, rq)) 3458 return BLK_STS_IOERR; 3459 3460 blk_mq_start_request(rq); 3461 3462 mtip_hw_submit_io(dd, rq, cmd, hctx); 3463 return BLK_STS_OK; 3464 } 3465 3466 static void mtip_free_cmd(struct blk_mq_tag_set *set, struct request *rq, 3467 unsigned int hctx_idx) 3468 { 3469 struct driver_data *dd = set->driver_data; 3470 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3471 3472 if (!cmd->command) 3473 return; 3474 3475 dma_free_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ, cmd->command, 3476 cmd->command_dma); 3477 } 3478 3479 static int mtip_init_cmd(struct blk_mq_tag_set *set, struct request *rq, 3480 unsigned int hctx_idx, unsigned int numa_node) 3481 { 3482 struct driver_data *dd = set->driver_data; 3483 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3484 3485 cmd->command = dma_alloc_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ, 3486 &cmd->command_dma, GFP_KERNEL); 3487 if (!cmd->command) 3488 return -ENOMEM; 3489 3490 sg_init_table(cmd->sg, MTIP_MAX_SG); 3491 return 0; 3492 } 3493 3494 static enum blk_eh_timer_return mtip_cmd_timeout(struct request *req, 3495 bool reserved) 3496 { 3497 struct driver_data *dd = req->q->queuedata; 3498 3499 if (reserved) { 3500 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req); 3501 3502 cmd->status = BLK_STS_TIMEOUT; 3503 blk_mq_complete_request(req); 3504 return BLK_EH_DONE; 3505 } 3506 3507 if (test_bit(req->tag, dd->port->cmds_to_issue)) 3508 goto exit_handler; 3509 3510 if (test_and_set_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags)) 3511 goto exit_handler; 3512 3513 wake_up_interruptible(&dd->port->svc_wait); 3514 exit_handler: 3515 return BLK_EH_RESET_TIMER; 3516 } 3517 3518 static const struct blk_mq_ops mtip_mq_ops = { 3519 .queue_rq = mtip_queue_rq, 3520 .init_request = mtip_init_cmd, 3521 .exit_request = mtip_free_cmd, 3522 .complete = mtip_softirq_done_fn, 3523 .timeout = mtip_cmd_timeout, 3524 }; 3525 3526 /* 3527 * Block layer initialization function. 3528 * 3529 * This function is called once by the PCI layer for each P320 3530 * device that is connected to the system. 3531 * 3532 * @dd Pointer to the driver data structure. 3533 * 3534 * return value 3535 * 0 on success else an error code. 3536 */ 3537 static int mtip_block_initialize(struct driver_data *dd) 3538 { 3539 int rv = 0, wait_for_rebuild = 0; 3540 sector_t capacity; 3541 unsigned int index = 0; 3542 3543 if (dd->disk) 3544 goto skip_create_disk; /* hw init done, before rebuild */ 3545 3546 if (mtip_hw_init(dd)) { 3547 rv = -EINVAL; 3548 goto protocol_init_error; 3549 } 3550 3551 memset(&dd->tags, 0, sizeof(dd->tags)); 3552 dd->tags.ops = &mtip_mq_ops; 3553 dd->tags.nr_hw_queues = 1; 3554 dd->tags.queue_depth = MTIP_MAX_COMMAND_SLOTS; 3555 dd->tags.reserved_tags = 1; 3556 dd->tags.cmd_size = sizeof(struct mtip_cmd); 3557 dd->tags.numa_node = dd->numa_node; 3558 dd->tags.flags = BLK_MQ_F_SHOULD_MERGE; 3559 dd->tags.driver_data = dd; 3560 dd->tags.timeout = MTIP_NCQ_CMD_TIMEOUT_MS; 3561 3562 rv = blk_mq_alloc_tag_set(&dd->tags); 3563 if (rv) { 3564 dev_err(&dd->pdev->dev, 3565 "Unable to allocate request queue\n"); 3566 goto block_queue_alloc_tag_error; 3567 } 3568 3569 dd->disk = blk_mq_alloc_disk(&dd->tags, dd); 3570 if (IS_ERR(dd->disk)) { 3571 dev_err(&dd->pdev->dev, 3572 "Unable to allocate request queue\n"); 3573 rv = -ENOMEM; 3574 goto block_queue_alloc_init_error; 3575 } 3576 dd->queue = dd->disk->queue; 3577 3578 rv = ida_alloc(&rssd_index_ida, GFP_KERNEL); 3579 if (rv < 0) 3580 goto ida_get_error; 3581 index = rv; 3582 3583 rv = rssd_disk_name_format("rssd", 3584 index, 3585 dd->disk->disk_name, 3586 DISK_NAME_LEN); 3587 if (rv) 3588 goto disk_index_error; 3589 3590 dd->disk->major = dd->major; 3591 dd->disk->first_minor = index * MTIP_MAX_MINORS; 3592 dd->disk->minors = MTIP_MAX_MINORS; 3593 dd->disk->fops = &mtip_block_ops; 3594 dd->disk->private_data = dd; 3595 dd->index = index; 3596 3597 mtip_hw_debugfs_init(dd); 3598 3599 skip_create_disk: 3600 /* Initialize the protocol layer. */ 3601 wait_for_rebuild = mtip_hw_get_identify(dd); 3602 if (wait_for_rebuild < 0) { 3603 dev_err(&dd->pdev->dev, 3604 "Protocol layer initialization failed\n"); 3605 rv = -EINVAL; 3606 goto init_hw_cmds_error; 3607 } 3608 3609 /* 3610 * if rebuild pending, start the service thread, and delay the block 3611 * queue creation and device_add_disk() 3612 */ 3613 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) 3614 goto start_service_thread; 3615 3616 /* Set device limits. */ 3617 blk_queue_flag_set(QUEUE_FLAG_NONROT, dd->queue); 3618 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, dd->queue); 3619 blk_queue_max_segments(dd->queue, MTIP_MAX_SG); 3620 blk_queue_physical_block_size(dd->queue, 4096); 3621 blk_queue_max_hw_sectors(dd->queue, 0xffff); 3622 blk_queue_max_segment_size(dd->queue, 0x400000); 3623 dma_set_max_seg_size(&dd->pdev->dev, 0x400000); 3624 blk_queue_io_min(dd->queue, 4096); 3625 3626 /* Set the capacity of the device in 512 byte sectors. */ 3627 if (!(mtip_hw_get_capacity(dd, &capacity))) { 3628 dev_warn(&dd->pdev->dev, 3629 "Could not read drive capacity\n"); 3630 rv = -EIO; 3631 goto read_capacity_error; 3632 } 3633 set_capacity(dd->disk, capacity); 3634 3635 /* Enable the block device and add it to /dev */ 3636 device_add_disk(&dd->pdev->dev, dd->disk, mtip_disk_attr_groups); 3637 3638 if (dd->mtip_svc_handler) { 3639 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); 3640 return rv; /* service thread created for handling rebuild */ 3641 } 3642 3643 start_service_thread: 3644 dd->mtip_svc_handler = kthread_create_on_node(mtip_service_thread, 3645 dd, dd->numa_node, 3646 "mtip_svc_thd_%02d", index); 3647 3648 if (IS_ERR(dd->mtip_svc_handler)) { 3649 dev_err(&dd->pdev->dev, "service thread failed to start\n"); 3650 dd->mtip_svc_handler = NULL; 3651 rv = -EFAULT; 3652 goto kthread_run_error; 3653 } 3654 wake_up_process(dd->mtip_svc_handler); 3655 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) 3656 rv = wait_for_rebuild; 3657 3658 return rv; 3659 3660 kthread_run_error: 3661 /* Delete our gendisk. This also removes the device from /dev */ 3662 del_gendisk(dd->disk); 3663 read_capacity_error: 3664 init_hw_cmds_error: 3665 mtip_hw_debugfs_exit(dd); 3666 disk_index_error: 3667 ida_free(&rssd_index_ida, index); 3668 ida_get_error: 3669 blk_cleanup_disk(dd->disk); 3670 block_queue_alloc_init_error: 3671 blk_mq_free_tag_set(&dd->tags); 3672 block_queue_alloc_tag_error: 3673 mtip_hw_exit(dd); /* De-initialize the protocol layer. */ 3674 protocol_init_error: 3675 return rv; 3676 } 3677 3678 static bool mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv) 3679 { 3680 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3681 3682 cmd->status = BLK_STS_IOERR; 3683 blk_mq_complete_request(rq); 3684 return true; 3685 } 3686 3687 /* 3688 * Block layer deinitialization function. 3689 * 3690 * Called by the PCI layer as each P320 device is removed. 3691 * 3692 * @dd Pointer to the driver data structure. 3693 * 3694 * return value 3695 * 0 3696 */ 3697 static int mtip_block_remove(struct driver_data *dd) 3698 { 3699 mtip_hw_debugfs_exit(dd); 3700 3701 if (dd->mtip_svc_handler) { 3702 set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags); 3703 wake_up_interruptible(&dd->port->svc_wait); 3704 kthread_stop(dd->mtip_svc_handler); 3705 } 3706 3707 if (!dd->sr) { 3708 /* 3709 * Explicitly wait here for IOs to quiesce, 3710 * as mtip_standby_drive usually won't wait for IOs. 3711 */ 3712 if (!mtip_quiesce_io(dd->port, MTIP_QUIESCE_IO_TIMEOUT_MS)) 3713 mtip_standby_drive(dd); 3714 } 3715 else 3716 dev_info(&dd->pdev->dev, "device %s surprise removal\n", 3717 dd->disk->disk_name); 3718 3719 blk_freeze_queue_start(dd->queue); 3720 blk_mq_quiesce_queue(dd->queue); 3721 blk_mq_tagset_busy_iter(&dd->tags, mtip_no_dev_cleanup, dd); 3722 blk_mq_unquiesce_queue(dd->queue); 3723 3724 if (dd->disk) { 3725 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) 3726 del_gendisk(dd->disk); 3727 if (dd->disk->queue) { 3728 blk_cleanup_queue(dd->queue); 3729 blk_mq_free_tag_set(&dd->tags); 3730 dd->queue = NULL; 3731 } 3732 put_disk(dd->disk); 3733 } 3734 dd->disk = NULL; 3735 3736 ida_free(&rssd_index_ida, dd->index); 3737 3738 /* De-initialize the protocol layer. */ 3739 mtip_hw_exit(dd); 3740 3741 return 0; 3742 } 3743 3744 /* 3745 * Function called by the PCI layer when just before the 3746 * machine shuts down. 3747 * 3748 * If a protocol layer shutdown function is present it will be called 3749 * by this function. 3750 * 3751 * @dd Pointer to the driver data structure. 3752 * 3753 * return value 3754 * 0 3755 */ 3756 static int mtip_block_shutdown(struct driver_data *dd) 3757 { 3758 mtip_hw_shutdown(dd); 3759 3760 /* Delete our gendisk structure, and cleanup the blk queue. */ 3761 if (dd->disk) { 3762 dev_info(&dd->pdev->dev, 3763 "Shutting down %s ...\n", dd->disk->disk_name); 3764 3765 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) 3766 del_gendisk(dd->disk); 3767 if (dd->disk->queue) { 3768 blk_cleanup_queue(dd->queue); 3769 blk_mq_free_tag_set(&dd->tags); 3770 } 3771 put_disk(dd->disk); 3772 dd->disk = NULL; 3773 dd->queue = NULL; 3774 } 3775 3776 ida_free(&rssd_index_ida, dd->index); 3777 return 0; 3778 } 3779 3780 static int mtip_block_suspend(struct driver_data *dd) 3781 { 3782 dev_info(&dd->pdev->dev, 3783 "Suspending %s ...\n", dd->disk->disk_name); 3784 mtip_hw_suspend(dd); 3785 return 0; 3786 } 3787 3788 static int mtip_block_resume(struct driver_data *dd) 3789 { 3790 dev_info(&dd->pdev->dev, "Resuming %s ...\n", 3791 dd->disk->disk_name); 3792 mtip_hw_resume(dd); 3793 return 0; 3794 } 3795 3796 static void drop_cpu(int cpu) 3797 { 3798 cpu_use[cpu]--; 3799 } 3800 3801 static int get_least_used_cpu_on_node(int node) 3802 { 3803 int cpu, least_used_cpu, least_cnt; 3804 const struct cpumask *node_mask; 3805 3806 node_mask = cpumask_of_node(node); 3807 least_used_cpu = cpumask_first(node_mask); 3808 least_cnt = cpu_use[least_used_cpu]; 3809 cpu = least_used_cpu; 3810 3811 for_each_cpu(cpu, node_mask) { 3812 if (cpu_use[cpu] < least_cnt) { 3813 least_used_cpu = cpu; 3814 least_cnt = cpu_use[cpu]; 3815 } 3816 } 3817 cpu_use[least_used_cpu]++; 3818 return least_used_cpu; 3819 } 3820 3821 /* Helper for selecting a node in round robin mode */ 3822 static inline int mtip_get_next_rr_node(void) 3823 { 3824 static int next_node = NUMA_NO_NODE; 3825 3826 if (next_node == NUMA_NO_NODE) { 3827 next_node = first_online_node; 3828 return next_node; 3829 } 3830 3831 next_node = next_online_node(next_node); 3832 if (next_node == MAX_NUMNODES) 3833 next_node = first_online_node; 3834 return next_node; 3835 } 3836 3837 static DEFINE_HANDLER(0); 3838 static DEFINE_HANDLER(1); 3839 static DEFINE_HANDLER(2); 3840 static DEFINE_HANDLER(3); 3841 static DEFINE_HANDLER(4); 3842 static DEFINE_HANDLER(5); 3843 static DEFINE_HANDLER(6); 3844 static DEFINE_HANDLER(7); 3845 3846 static void mtip_disable_link_opts(struct driver_data *dd, struct pci_dev *pdev) 3847 { 3848 unsigned short pcie_dev_ctrl; 3849 3850 if (pci_is_pcie(pdev)) { 3851 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &pcie_dev_ctrl); 3852 if (pcie_dev_ctrl & PCI_EXP_DEVCTL_NOSNOOP_EN || 3853 pcie_dev_ctrl & PCI_EXP_DEVCTL_RELAX_EN) { 3854 dev_info(&dd->pdev->dev, 3855 "Disabling ERO/No-Snoop on bridge device %04x:%04x\n", 3856 pdev->vendor, pdev->device); 3857 pcie_dev_ctrl &= ~(PCI_EXP_DEVCTL_NOSNOOP_EN | 3858 PCI_EXP_DEVCTL_RELAX_EN); 3859 pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, 3860 pcie_dev_ctrl); 3861 } 3862 } 3863 } 3864 3865 static void mtip_fix_ero_nosnoop(struct driver_data *dd, struct pci_dev *pdev) 3866 { 3867 /* 3868 * This workaround is specific to AMD/ATI chipset with a PCI upstream 3869 * device with device id 0x5aXX 3870 */ 3871 if (pdev->bus && pdev->bus->self) { 3872 if (pdev->bus->self->vendor == PCI_VENDOR_ID_ATI && 3873 ((pdev->bus->self->device & 0xff00) == 0x5a00)) { 3874 mtip_disable_link_opts(dd, pdev->bus->self); 3875 } else { 3876 /* Check further up the topology */ 3877 struct pci_dev *parent_dev = pdev->bus->self; 3878 if (parent_dev->bus && 3879 parent_dev->bus->parent && 3880 parent_dev->bus->parent->self && 3881 parent_dev->bus->parent->self->vendor == 3882 PCI_VENDOR_ID_ATI && 3883 (parent_dev->bus->parent->self->device & 3884 0xff00) == 0x5a00) { 3885 mtip_disable_link_opts(dd, 3886 parent_dev->bus->parent->self); 3887 } 3888 } 3889 } 3890 } 3891 3892 /* 3893 * Called for each supported PCI device detected. 3894 * 3895 * This function allocates the private data structure, enables the 3896 * PCI device and then calls the block layer initialization function. 3897 * 3898 * return value 3899 * 0 on success else an error code. 3900 */ 3901 static int mtip_pci_probe(struct pci_dev *pdev, 3902 const struct pci_device_id *ent) 3903 { 3904 int rv = 0; 3905 struct driver_data *dd = NULL; 3906 char cpu_list[256]; 3907 const struct cpumask *node_mask; 3908 int cpu, i = 0, j = 0; 3909 int my_node = NUMA_NO_NODE; 3910 unsigned long flags; 3911 3912 /* Allocate memory for this devices private data. */ 3913 my_node = pcibus_to_node(pdev->bus); 3914 if (my_node != NUMA_NO_NODE) { 3915 if (!node_online(my_node)) 3916 my_node = mtip_get_next_rr_node(); 3917 } else { 3918 dev_info(&pdev->dev, "Kernel not reporting proximity, choosing a node\n"); 3919 my_node = mtip_get_next_rr_node(); 3920 } 3921 dev_info(&pdev->dev, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n", 3922 my_node, pcibus_to_node(pdev->bus), dev_to_node(&pdev->dev), 3923 cpu_to_node(raw_smp_processor_id()), raw_smp_processor_id()); 3924 3925 dd = kzalloc_node(sizeof(struct driver_data), GFP_KERNEL, my_node); 3926 if (!dd) 3927 return -ENOMEM; 3928 3929 /* Attach the private data to this PCI device. */ 3930 pci_set_drvdata(pdev, dd); 3931 3932 rv = pcim_enable_device(pdev); 3933 if (rv < 0) { 3934 dev_err(&pdev->dev, "Unable to enable device\n"); 3935 goto iomap_err; 3936 } 3937 3938 /* Map BAR5 to memory. */ 3939 rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME); 3940 if (rv < 0) { 3941 dev_err(&pdev->dev, "Unable to map regions\n"); 3942 goto iomap_err; 3943 } 3944 3945 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 3946 if (rv) { 3947 dev_warn(&pdev->dev, "64-bit DMA enable failed\n"); 3948 goto setmask_err; 3949 } 3950 3951 /* Copy the info we may need later into the private data structure. */ 3952 dd->major = mtip_major; 3953 dd->instance = instance; 3954 dd->pdev = pdev; 3955 dd->numa_node = my_node; 3956 3957 INIT_LIST_HEAD(&dd->online_list); 3958 INIT_LIST_HEAD(&dd->remove_list); 3959 3960 memset(dd->workq_name, 0, 32); 3961 snprintf(dd->workq_name, 31, "mtipq%d", dd->instance); 3962 3963 dd->isr_workq = create_workqueue(dd->workq_name); 3964 if (!dd->isr_workq) { 3965 dev_warn(&pdev->dev, "Can't create wq %d\n", dd->instance); 3966 rv = -ENOMEM; 3967 goto setmask_err; 3968 } 3969 3970 memset(cpu_list, 0, sizeof(cpu_list)); 3971 3972 node_mask = cpumask_of_node(dd->numa_node); 3973 if (!cpumask_empty(node_mask)) { 3974 for_each_cpu(cpu, node_mask) 3975 { 3976 snprintf(&cpu_list[j], 256 - j, "%d ", cpu); 3977 j = strlen(cpu_list); 3978 } 3979 3980 dev_info(&pdev->dev, "Node %d on package %d has %d cpu(s): %s\n", 3981 dd->numa_node, 3982 topology_physical_package_id(cpumask_first(node_mask)), 3983 nr_cpus_node(dd->numa_node), 3984 cpu_list); 3985 } else 3986 dev_dbg(&pdev->dev, "mtip32xx: node_mask empty\n"); 3987 3988 dd->isr_binding = get_least_used_cpu_on_node(dd->numa_node); 3989 dev_info(&pdev->dev, "Initial IRQ binding node:cpu %d:%d\n", 3990 cpu_to_node(dd->isr_binding), dd->isr_binding); 3991 3992 /* first worker context always runs in ISR */ 3993 dd->work[0].cpu_binding = dd->isr_binding; 3994 dd->work[1].cpu_binding = get_least_used_cpu_on_node(dd->numa_node); 3995 dd->work[2].cpu_binding = get_least_used_cpu_on_node(dd->numa_node); 3996 dd->work[3].cpu_binding = dd->work[0].cpu_binding; 3997 dd->work[4].cpu_binding = dd->work[1].cpu_binding; 3998 dd->work[5].cpu_binding = dd->work[2].cpu_binding; 3999 dd->work[6].cpu_binding = dd->work[2].cpu_binding; 4000 dd->work[7].cpu_binding = dd->work[1].cpu_binding; 4001 4002 /* Log the bindings */ 4003 for_each_present_cpu(cpu) { 4004 memset(cpu_list, 0, sizeof(cpu_list)); 4005 for (i = 0, j = 0; i < MTIP_MAX_SLOT_GROUPS; i++) { 4006 if (dd->work[i].cpu_binding == cpu) { 4007 snprintf(&cpu_list[j], 256 - j, "%d ", i); 4008 j = strlen(cpu_list); 4009 } 4010 } 4011 if (j) 4012 dev_info(&pdev->dev, "CPU %d: WQs %s\n", cpu, cpu_list); 4013 } 4014 4015 INIT_WORK(&dd->work[0].work, mtip_workq_sdbf0); 4016 INIT_WORK(&dd->work[1].work, mtip_workq_sdbf1); 4017 INIT_WORK(&dd->work[2].work, mtip_workq_sdbf2); 4018 INIT_WORK(&dd->work[3].work, mtip_workq_sdbf3); 4019 INIT_WORK(&dd->work[4].work, mtip_workq_sdbf4); 4020 INIT_WORK(&dd->work[5].work, mtip_workq_sdbf5); 4021 INIT_WORK(&dd->work[6].work, mtip_workq_sdbf6); 4022 INIT_WORK(&dd->work[7].work, mtip_workq_sdbf7); 4023 4024 pci_set_master(pdev); 4025 rv = pci_enable_msi(pdev); 4026 if (rv) { 4027 dev_warn(&pdev->dev, 4028 "Unable to enable MSI interrupt.\n"); 4029 goto msi_initialize_err; 4030 } 4031 4032 mtip_fix_ero_nosnoop(dd, pdev); 4033 4034 /* Initialize the block layer. */ 4035 rv = mtip_block_initialize(dd); 4036 if (rv < 0) { 4037 dev_err(&pdev->dev, 4038 "Unable to initialize block layer\n"); 4039 goto block_initialize_err; 4040 } 4041 4042 /* 4043 * Increment the instance count so that each device has a unique 4044 * instance number. 4045 */ 4046 instance++; 4047 if (rv != MTIP_FTL_REBUILD_MAGIC) 4048 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); 4049 else 4050 rv = 0; /* device in rebuild state, return 0 from probe */ 4051 4052 /* Add to online list even if in ftl rebuild */ 4053 spin_lock_irqsave(&dev_lock, flags); 4054 list_add(&dd->online_list, &online_list); 4055 spin_unlock_irqrestore(&dev_lock, flags); 4056 4057 goto done; 4058 4059 block_initialize_err: 4060 pci_disable_msi(pdev); 4061 4062 msi_initialize_err: 4063 if (dd->isr_workq) { 4064 flush_workqueue(dd->isr_workq); 4065 destroy_workqueue(dd->isr_workq); 4066 drop_cpu(dd->work[0].cpu_binding); 4067 drop_cpu(dd->work[1].cpu_binding); 4068 drop_cpu(dd->work[2].cpu_binding); 4069 } 4070 setmask_err: 4071 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); 4072 4073 iomap_err: 4074 kfree(dd); 4075 pci_set_drvdata(pdev, NULL); 4076 return rv; 4077 done: 4078 return rv; 4079 } 4080 4081 /* 4082 * Called for each probed device when the device is removed or the 4083 * driver is unloaded. 4084 * 4085 * return value 4086 * None 4087 */ 4088 static void mtip_pci_remove(struct pci_dev *pdev) 4089 { 4090 struct driver_data *dd = pci_get_drvdata(pdev); 4091 unsigned long flags, to; 4092 4093 set_bit(MTIP_DDF_REMOVAL_BIT, &dd->dd_flag); 4094 4095 spin_lock_irqsave(&dev_lock, flags); 4096 list_del_init(&dd->online_list); 4097 list_add(&dd->remove_list, &removing_list); 4098 spin_unlock_irqrestore(&dev_lock, flags); 4099 4100 mtip_check_surprise_removal(pdev); 4101 synchronize_irq(dd->pdev->irq); 4102 4103 /* Spin until workers are done */ 4104 to = jiffies + msecs_to_jiffies(4000); 4105 do { 4106 msleep(20); 4107 } while (atomic_read(&dd->irq_workers_active) != 0 && 4108 time_before(jiffies, to)); 4109 4110 if (atomic_read(&dd->irq_workers_active) != 0) { 4111 dev_warn(&dd->pdev->dev, 4112 "Completion workers still active!\n"); 4113 } 4114 4115 blk_set_queue_dying(dd->queue); 4116 set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag); 4117 4118 /* Clean up the block layer. */ 4119 mtip_block_remove(dd); 4120 4121 if (dd->isr_workq) { 4122 flush_workqueue(dd->isr_workq); 4123 destroy_workqueue(dd->isr_workq); 4124 drop_cpu(dd->work[0].cpu_binding); 4125 drop_cpu(dd->work[1].cpu_binding); 4126 drop_cpu(dd->work[2].cpu_binding); 4127 } 4128 4129 pci_disable_msi(pdev); 4130 4131 spin_lock_irqsave(&dev_lock, flags); 4132 list_del_init(&dd->remove_list); 4133 spin_unlock_irqrestore(&dev_lock, flags); 4134 4135 kfree(dd); 4136 4137 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); 4138 pci_set_drvdata(pdev, NULL); 4139 } 4140 4141 /* 4142 * Called for each probed device when the device is suspended. 4143 * 4144 * return value 4145 * 0 Success 4146 * <0 Error 4147 */ 4148 static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) 4149 { 4150 int rv = 0; 4151 struct driver_data *dd = pci_get_drvdata(pdev); 4152 4153 if (!dd) { 4154 dev_err(&pdev->dev, 4155 "Driver private datastructure is NULL\n"); 4156 return -EFAULT; 4157 } 4158 4159 set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); 4160 4161 /* Disable ports & interrupts then send standby immediate */ 4162 rv = mtip_block_suspend(dd); 4163 if (rv < 0) { 4164 dev_err(&pdev->dev, 4165 "Failed to suspend controller\n"); 4166 return rv; 4167 } 4168 4169 /* 4170 * Save the pci config space to pdev structure & 4171 * disable the device 4172 */ 4173 pci_save_state(pdev); 4174 pci_disable_device(pdev); 4175 4176 /* Move to Low power state*/ 4177 pci_set_power_state(pdev, PCI_D3hot); 4178 4179 return rv; 4180 } 4181 4182 /* 4183 * Called for each probed device when the device is resumed. 4184 * 4185 * return value 4186 * 0 Success 4187 * <0 Error 4188 */ 4189 static int mtip_pci_resume(struct pci_dev *pdev) 4190 { 4191 int rv = 0; 4192 struct driver_data *dd; 4193 4194 dd = pci_get_drvdata(pdev); 4195 if (!dd) { 4196 dev_err(&pdev->dev, 4197 "Driver private datastructure is NULL\n"); 4198 return -EFAULT; 4199 } 4200 4201 /* Move the device to active State */ 4202 pci_set_power_state(pdev, PCI_D0); 4203 4204 /* Restore PCI configuration space */ 4205 pci_restore_state(pdev); 4206 4207 /* Enable the PCI device*/ 4208 rv = pcim_enable_device(pdev); 4209 if (rv < 0) { 4210 dev_err(&pdev->dev, 4211 "Failed to enable card during resume\n"); 4212 goto err; 4213 } 4214 pci_set_master(pdev); 4215 4216 /* 4217 * Calls hbaReset, initPort, & startPort function 4218 * then enables interrupts 4219 */ 4220 rv = mtip_block_resume(dd); 4221 if (rv < 0) 4222 dev_err(&pdev->dev, "Unable to resume\n"); 4223 4224 err: 4225 clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); 4226 4227 return rv; 4228 } 4229 4230 /* 4231 * Shutdown routine 4232 * 4233 * return value 4234 * None 4235 */ 4236 static void mtip_pci_shutdown(struct pci_dev *pdev) 4237 { 4238 struct driver_data *dd = pci_get_drvdata(pdev); 4239 if (dd) 4240 mtip_block_shutdown(dd); 4241 } 4242 4243 /* Table of device ids supported by this driver. */ 4244 static const struct pci_device_id mtip_pci_tbl[] = { 4245 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320H_DEVICE_ID) }, 4246 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320M_DEVICE_ID) }, 4247 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320S_DEVICE_ID) }, 4248 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P325M_DEVICE_ID) }, 4249 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420H_DEVICE_ID) }, 4250 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420M_DEVICE_ID) }, 4251 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P425M_DEVICE_ID) }, 4252 { 0 } 4253 }; 4254 4255 /* Structure that describes the PCI driver functions. */ 4256 static struct pci_driver mtip_pci_driver = { 4257 .name = MTIP_DRV_NAME, 4258 .id_table = mtip_pci_tbl, 4259 .probe = mtip_pci_probe, 4260 .remove = mtip_pci_remove, 4261 .suspend = mtip_pci_suspend, 4262 .resume = mtip_pci_resume, 4263 .shutdown = mtip_pci_shutdown, 4264 }; 4265 4266 MODULE_DEVICE_TABLE(pci, mtip_pci_tbl); 4267 4268 /* 4269 * Module initialization function. 4270 * 4271 * Called once when the module is loaded. This function allocates a major 4272 * block device number to the Cyclone devices and registers the PCI layer 4273 * of the driver. 4274 * 4275 * Return value 4276 * 0 on success else error code. 4277 */ 4278 static int __init mtip_init(void) 4279 { 4280 int error; 4281 4282 pr_info(MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n"); 4283 4284 /* Allocate a major block device number to use with this driver. */ 4285 error = register_blkdev(0, MTIP_DRV_NAME); 4286 if (error <= 0) { 4287 pr_err("Unable to register block device (%d)\n", 4288 error); 4289 return -EBUSY; 4290 } 4291 mtip_major = error; 4292 4293 dfs_parent = debugfs_create_dir("rssd", NULL); 4294 if (IS_ERR_OR_NULL(dfs_parent)) { 4295 pr_warn("Error creating debugfs parent\n"); 4296 dfs_parent = NULL; 4297 } 4298 if (dfs_parent) { 4299 dfs_device_status = debugfs_create_file("device_status", 4300 0444, dfs_parent, NULL, 4301 &mtip_device_status_fops); 4302 if (IS_ERR_OR_NULL(dfs_device_status)) { 4303 pr_err("Error creating device_status node\n"); 4304 dfs_device_status = NULL; 4305 } 4306 } 4307 4308 /* Register our PCI operations. */ 4309 error = pci_register_driver(&mtip_pci_driver); 4310 if (error) { 4311 debugfs_remove(dfs_parent); 4312 unregister_blkdev(mtip_major, MTIP_DRV_NAME); 4313 } 4314 4315 return error; 4316 } 4317 4318 /* 4319 * Module de-initialization function. 4320 * 4321 * Called once when the module is unloaded. This function deallocates 4322 * the major block device number allocated by mtip_init() and 4323 * unregisters the PCI layer of the driver. 4324 * 4325 * Return value 4326 * none 4327 */ 4328 static void __exit mtip_exit(void) 4329 { 4330 /* Release the allocated major block device number. */ 4331 unregister_blkdev(mtip_major, MTIP_DRV_NAME); 4332 4333 /* Unregister the PCI driver. */ 4334 pci_unregister_driver(&mtip_pci_driver); 4335 4336 debugfs_remove_recursive(dfs_parent); 4337 } 4338 4339 MODULE_AUTHOR("Micron Technology, Inc"); 4340 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver"); 4341 MODULE_LICENSE("GPL"); 4342 MODULE_VERSION(MTIP_DRV_VERSION); 4343 4344 module_init(mtip_init); 4345 module_exit(mtip_exit); 4346