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. */ 96static int instance; 97 98static struct list_head online_list; 99static struct list_head removing_list; 100static spinlock_t dev_lock; 101 102/* 103 * Global variable used to hold the major block device number 104 * allocated in mtip_init(). 105 */ 106static int mtip_major; 107static struct dentry *dfs_parent; 108static struct dentry *dfs_device_status; 109 110static u32 cpu_use[NR_CPUS]; 111 112static DEFINE_IDA(rssd_index_ida); 113 114static int mtip_block_initialize(struct driver_data *dd); 115 116#ifdef CONFIG_COMPAT 117struct 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 */ 139static 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 162static 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 */ 179static 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 */ 220static 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 */ 242static 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 */ 268static 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 */ 289static 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 */ 307static 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 */ 332static 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 */ 376static 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 446static 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 */ 469static 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 485static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer, 486 dma_addr_t buffer_dma, unsigned int sectors); 487static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id, 488 struct smart_attr *attrib); 489 490static 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 */ 507static 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 */ 658static 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 */ 695static 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 */ 712static 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 739static 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 */ 831static 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 838static 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 843static 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 875static 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 */ 901static 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; 928err_fault: 929 blk_mq_unquiesce_queue(port->dd->queue); 930 return -EFAULT; 931} 932 933struct 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 */ 958static 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(rq->q, 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 } 1047exec_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 */ 1073static 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 1080static 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 */ 1130static 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 1199out: 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 */ 1212static int mtip_standby_immediate(struct mtip_port *port) 1213{ 1214 int rv; 1215 struct host_to_dev_fis fis; 1216 unsigned long 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 */ 1256static 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 */ 1292static 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 */ 1327static 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 */ 1382static 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 */ 1403static 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 */ 1458static 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 */ 1488static 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 */ 1557static 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 } 1646exit_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 */ 1665static 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 */ 1704static 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 } 1924abort: 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 */ 1954static 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 */ 2057static 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 */ 2144static 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 2161static DEVICE_ATTR(status, 0444, mtip_hw_show_status, NULL); 2162 2163/* debugsfs entries */ 2164 2165static ssize_t show_device_status(struct device_driver *drv, char *buf) 2166{ 2167 int size = 0; 2168 struct driver_data *dd, *tmp; 2169 unsigned long flags; 2170 char id_buf[42]; 2171 u16 status = 0; 2172 2173 spin_lock_irqsave(&dev_lock, flags); 2174 size += sprintf(&buf[size], "Devices Present:\n"); 2175 list_for_each_entry_safe(dd, tmp, &online_list, online_list) { 2176 if (dd->pdev) { 2177 if (dd->port && 2178 dd->port->identify && 2179 dd->port->identify_valid) { 2180 strlcpy(id_buf, 2181 (char *) (dd->port->identify + 10), 21); 2182 status = *(dd->port->identify + 141); 2183 } else { 2184 memset(id_buf, 0, 42); 2185 status = 0; 2186 } 2187 2188 if (dd->port && 2189 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) { 2190 size += sprintf(&buf[size], 2191 " device %s %s (ftl rebuild %d %%)\n", 2192 dev_name(&dd->pdev->dev), 2193 id_buf, 2194 status); 2195 } else { 2196 size += sprintf(&buf[size], 2197 " device %s %s\n", 2198 dev_name(&dd->pdev->dev), 2199 id_buf); 2200 } 2201 } 2202 } 2203 2204 size += sprintf(&buf[size], "Devices Being Removed:\n"); 2205 list_for_each_entry_safe(dd, tmp, &removing_list, remove_list) { 2206 if (dd->pdev) { 2207 if (dd->port && 2208 dd->port->identify && 2209 dd->port->identify_valid) { 2210 strlcpy(id_buf, 2211 (char *) (dd->port->identify+10), 21); 2212 status = *(dd->port->identify + 141); 2213 } else { 2214 memset(id_buf, 0, 42); 2215 status = 0; 2216 } 2217 2218 if (dd->port && 2219 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) { 2220 size += sprintf(&buf[size], 2221 " device %s %s (ftl rebuild %d %%)\n", 2222 dev_name(&dd->pdev->dev), 2223 id_buf, 2224 status); 2225 } else { 2226 size += sprintf(&buf[size], 2227 " device %s %s\n", 2228 dev_name(&dd->pdev->dev), 2229 id_buf); 2230 } 2231 } 2232 } 2233 spin_unlock_irqrestore(&dev_lock, flags); 2234 2235 return size; 2236} 2237 2238static ssize_t mtip_hw_read_device_status(struct file *f, char __user *ubuf, 2239 size_t len, loff_t *offset) 2240{ 2241 struct driver_data *dd = (struct driver_data *)f->private_data; 2242 int size = *offset; 2243 char *buf; 2244 int rv = 0; 2245 2246 if (!len || *offset) 2247 return 0; 2248 2249 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); 2250 if (!buf) { 2251 dev_err(&dd->pdev->dev, 2252 "Memory allocation: status buffer\n"); 2253 return -ENOMEM; 2254 } 2255 2256 size += show_device_status(NULL, buf); 2257 2258 *offset = size <= len ? size : len; 2259 size = copy_to_user(ubuf, buf, *offset); 2260 if (size) 2261 rv = -EFAULT; 2262 2263 kfree(buf); 2264 return rv ? rv : *offset; 2265} 2266 2267static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf, 2268 size_t len, loff_t *offset) 2269{ 2270 struct driver_data *dd = (struct driver_data *)f->private_data; 2271 char *buf; 2272 u32 group_allocated; 2273 int size = *offset; 2274 int n, rv = 0; 2275 2276 if (!len || size) 2277 return 0; 2278 2279 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); 2280 if (!buf) { 2281 dev_err(&dd->pdev->dev, 2282 "Memory allocation: register buffer\n"); 2283 return -ENOMEM; 2284 } 2285 2286 size += sprintf(&buf[size], "H/ S ACTive : [ 0x"); 2287 2288 for (n = dd->slot_groups-1; n >= 0; n--) 2289 size += sprintf(&buf[size], "%08X ", 2290 readl(dd->port->s_active[n])); 2291 2292 size += sprintf(&buf[size], "]\n"); 2293 size += sprintf(&buf[size], "H/ Command Issue : [ 0x"); 2294 2295 for (n = dd->slot_groups-1; n >= 0; n--) 2296 size += sprintf(&buf[size], "%08X ", 2297 readl(dd->port->cmd_issue[n])); 2298 2299 size += sprintf(&buf[size], "]\n"); 2300 size += sprintf(&buf[size], "H/ Completed : [ 0x"); 2301 2302 for (n = dd->slot_groups-1; n >= 0; n--) 2303 size += sprintf(&buf[size], "%08X ", 2304 readl(dd->port->completed[n])); 2305 2306 size += sprintf(&buf[size], "]\n"); 2307 size += sprintf(&buf[size], "H/ PORT IRQ STAT : [ 0x%08X ]\n", 2308 readl(dd->port->mmio + PORT_IRQ_STAT)); 2309 size += sprintf(&buf[size], "H/ HOST IRQ STAT : [ 0x%08X ]\n", 2310 readl(dd->mmio + HOST_IRQ_STAT)); 2311 size += sprintf(&buf[size], "\n"); 2312 2313 size += sprintf(&buf[size], "L/ Commands in Q : [ 0x"); 2314 2315 for (n = dd->slot_groups-1; n >= 0; n--) { 2316 if (sizeof(long) > sizeof(u32)) 2317 group_allocated = 2318 dd->port->cmds_to_issue[n/2] >> (32*(n&1)); 2319 else 2320 group_allocated = dd->port->cmds_to_issue[n]; 2321 size += sprintf(&buf[size], "%08X ", group_allocated); 2322 } 2323 size += sprintf(&buf[size], "]\n"); 2324 2325 *offset = size <= len ? size : len; 2326 size = copy_to_user(ubuf, buf, *offset); 2327 if (size) 2328 rv = -EFAULT; 2329 2330 kfree(buf); 2331 return rv ? rv : *offset; 2332} 2333 2334static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf, 2335 size_t len, loff_t *offset) 2336{ 2337 struct driver_data *dd = (struct driver_data *)f->private_data; 2338 char *buf; 2339 int size = *offset; 2340 int rv = 0; 2341 2342 if (!len || size) 2343 return 0; 2344 2345 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL); 2346 if (!buf) { 2347 dev_err(&dd->pdev->dev, 2348 "Memory allocation: flag buffer\n"); 2349 return -ENOMEM; 2350 } 2351 2352 size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n", 2353 dd->port->flags); 2354 size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n", 2355 dd->dd_flag); 2356 2357 *offset = size <= len ? size : len; 2358 size = copy_to_user(ubuf, buf, *offset); 2359 if (size) 2360 rv = -EFAULT; 2361 2362 kfree(buf); 2363 return rv ? rv : *offset; 2364} 2365 2366static const struct file_operations mtip_device_status_fops = { 2367 .owner = THIS_MODULE, 2368 .open = simple_open, 2369 .read = mtip_hw_read_device_status, 2370 .llseek = no_llseek, 2371}; 2372 2373static const struct file_operations mtip_regs_fops = { 2374 .owner = THIS_MODULE, 2375 .open = simple_open, 2376 .read = mtip_hw_read_registers, 2377 .llseek = no_llseek, 2378}; 2379 2380static const struct file_operations mtip_flags_fops = { 2381 .owner = THIS_MODULE, 2382 .open = simple_open, 2383 .read = mtip_hw_read_flags, 2384 .llseek = no_llseek, 2385}; 2386 2387/* 2388 * Create the sysfs related attributes. 2389 * 2390 * @dd Pointer to the driver data structure. 2391 * @kobj Pointer to the kobj for the block device. 2392 * 2393 * return value 2394 * 0 Operation completed successfully. 2395 * -EINVAL Invalid parameter. 2396 */ 2397static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj) 2398{ 2399 if (!kobj || !dd) 2400 return -EINVAL; 2401 2402 if (sysfs_create_file(kobj, &dev_attr_status.attr)) 2403 dev_warn(&dd->pdev->dev, 2404 "Error creating 'status' sysfs entry\n"); 2405 return 0; 2406} 2407 2408/* 2409 * Remove the sysfs related attributes. 2410 * 2411 * @dd Pointer to the driver data structure. 2412 * @kobj Pointer to the kobj for the block device. 2413 * 2414 * return value 2415 * 0 Operation completed successfully. 2416 * -EINVAL Invalid parameter. 2417 */ 2418static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj) 2419{ 2420 if (!kobj || !dd) 2421 return -EINVAL; 2422 2423 sysfs_remove_file(kobj, &dev_attr_status.attr); 2424 2425 return 0; 2426} 2427 2428static int mtip_hw_debugfs_init(struct driver_data *dd) 2429{ 2430 if (!dfs_parent) 2431 return -1; 2432 2433 dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent); 2434 if (IS_ERR_OR_NULL(dd->dfs_node)) { 2435 dev_warn(&dd->pdev->dev, 2436 "Error creating node %s under debugfs\n", 2437 dd->disk->disk_name); 2438 dd->dfs_node = NULL; 2439 return -1; 2440 } 2441 2442 debugfs_create_file("flags", 0444, dd->dfs_node, dd, &mtip_flags_fops); 2443 debugfs_create_file("registers", 0444, dd->dfs_node, dd, 2444 &mtip_regs_fops); 2445 2446 return 0; 2447} 2448 2449static void mtip_hw_debugfs_exit(struct driver_data *dd) 2450{ 2451 debugfs_remove_recursive(dd->dfs_node); 2452} 2453 2454/* 2455 * Perform any init/resume time hardware setup 2456 * 2457 * @dd Pointer to the driver data structure. 2458 * 2459 * return value 2460 * None 2461 */ 2462static inline void hba_setup(struct driver_data *dd) 2463{ 2464 u32 hwdata; 2465 hwdata = readl(dd->mmio + HOST_HSORG); 2466 2467 /* interrupt bug workaround: use only 1 IS bit.*/ 2468 writel(hwdata | 2469 HSORG_DISABLE_SLOTGRP_INTR | 2470 HSORG_DISABLE_SLOTGRP_PXIS, 2471 dd->mmio + HOST_HSORG); 2472} 2473 2474static int mtip_device_unaligned_constrained(struct driver_data *dd) 2475{ 2476 return (dd->pdev->device == P420M_DEVICE_ID ? 1 : 0); 2477} 2478 2479/* 2480 * Detect the details of the product, and store anything needed 2481 * into the driver data structure. This includes product type and 2482 * version and number of slot groups. 2483 * 2484 * @dd Pointer to the driver data structure. 2485 * 2486 * return value 2487 * None 2488 */ 2489static void mtip_detect_product(struct driver_data *dd) 2490{ 2491 u32 hwdata; 2492 unsigned int rev, slotgroups; 2493 2494 /* 2495 * HBA base + 0xFC [15:0] - vendor-specific hardware interface 2496 * info register: 2497 * [15:8] hardware/software interface rev# 2498 * [ 3] asic-style interface 2499 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style). 2500 */ 2501 hwdata = readl(dd->mmio + HOST_HSORG); 2502 2503 dd->product_type = MTIP_PRODUCT_UNKNOWN; 2504 dd->slot_groups = 1; 2505 2506 if (hwdata & 0x8) { 2507 dd->product_type = MTIP_PRODUCT_ASICFPGA; 2508 rev = (hwdata & HSORG_HWREV) >> 8; 2509 slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1; 2510 dev_info(&dd->pdev->dev, 2511 "ASIC-FPGA design, HS rev 0x%x, " 2512 "%i slot groups [%i slots]\n", 2513 rev, 2514 slotgroups, 2515 slotgroups * 32); 2516 2517 if (slotgroups > MTIP_MAX_SLOT_GROUPS) { 2518 dev_warn(&dd->pdev->dev, 2519 "Warning: driver only supports " 2520 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS); 2521 slotgroups = MTIP_MAX_SLOT_GROUPS; 2522 } 2523 dd->slot_groups = slotgroups; 2524 return; 2525 } 2526 2527 dev_warn(&dd->pdev->dev, "Unrecognized product id\n"); 2528} 2529 2530/* 2531 * Blocking wait for FTL rebuild to complete 2532 * 2533 * @dd Pointer to the DRIVER_DATA structure. 2534 * 2535 * return value 2536 * 0 FTL rebuild completed successfully 2537 * -EFAULT FTL rebuild error/timeout/interruption 2538 */ 2539static int mtip_ftl_rebuild_poll(struct driver_data *dd) 2540{ 2541 unsigned long timeout, cnt = 0, start; 2542 2543 dev_warn(&dd->pdev->dev, 2544 "FTL rebuild in progress. Polling for completion.\n"); 2545 2546 start = jiffies; 2547 timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS); 2548 2549 do { 2550 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, 2551 &dd->dd_flag))) 2552 return -EFAULT; 2553 if (mtip_check_surprise_removal(dd->pdev)) 2554 return -EFAULT; 2555 2556 if (mtip_get_identify(dd->port, NULL) < 0) 2557 return -EFAULT; 2558 2559 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == 2560 MTIP_FTL_REBUILD_MAGIC) { 2561 ssleep(1); 2562 /* Print message every 3 minutes */ 2563 if (cnt++ >= 180) { 2564 dev_warn(&dd->pdev->dev, 2565 "FTL rebuild in progress (%d secs).\n", 2566 jiffies_to_msecs(jiffies - start) / 1000); 2567 cnt = 0; 2568 } 2569 } else { 2570 dev_warn(&dd->pdev->dev, 2571 "FTL rebuild complete (%d secs).\n", 2572 jiffies_to_msecs(jiffies - start) / 1000); 2573 mtip_block_initialize(dd); 2574 return 0; 2575 } 2576 } while (time_before(jiffies, timeout)); 2577 2578 /* Check for timeout */ 2579 dev_err(&dd->pdev->dev, 2580 "Timed out waiting for FTL rebuild to complete (%d secs).\n", 2581 jiffies_to_msecs(jiffies - start) / 1000); 2582 return -EFAULT; 2583} 2584 2585static void mtip_softirq_done_fn(struct request *rq) 2586{ 2587 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 2588 struct driver_data *dd = rq->q->queuedata; 2589 2590 /* Unmap the DMA scatter list entries */ 2591 dma_unmap_sg(&dd->pdev->dev, cmd->sg, cmd->scatter_ents, 2592 cmd->direction); 2593 2594 if (unlikely(cmd->unaligned)) 2595 atomic_inc(&dd->port->cmd_slot_unal); 2596 2597 blk_mq_end_request(rq, cmd->status); 2598} 2599 2600static bool mtip_abort_cmd(struct request *req, void *data, bool reserved) 2601{ 2602 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req); 2603 struct driver_data *dd = data; 2604 2605 dbg_printk(MTIP_DRV_NAME " Aborting request, tag = %d\n", req->tag); 2606 2607 clear_bit(req->tag, dd->port->cmds_to_issue); 2608 cmd->status = BLK_STS_IOERR; 2609 mtip_softirq_done_fn(req); 2610 return true; 2611} 2612 2613static bool mtip_queue_cmd(struct request *req, void *data, bool reserved) 2614{ 2615 struct driver_data *dd = data; 2616 2617 set_bit(req->tag, dd->port->cmds_to_issue); 2618 blk_abort_request(req); 2619 return true; 2620} 2621 2622/* 2623 * service thread to issue queued commands 2624 * 2625 * @data Pointer to the driver data structure. 2626 * 2627 * return value 2628 * 0 2629 */ 2630 2631static int mtip_service_thread(void *data) 2632{ 2633 struct driver_data *dd = (struct driver_data *)data; 2634 unsigned long slot, slot_start, slot_wrap, to; 2635 unsigned int num_cmd_slots = dd->slot_groups * 32; 2636 struct mtip_port *port = dd->port; 2637 2638 while (1) { 2639 if (kthread_should_stop() || 2640 test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags)) 2641 goto st_out; 2642 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); 2643 2644 /* 2645 * the condition is to check neither an internal command is 2646 * is in progress nor error handling is active 2647 */ 2648 wait_event_interruptible(port->svc_wait, (port->flags) && 2649 (port->flags & MTIP_PF_SVC_THD_WORK)); 2650 2651 if (kthread_should_stop() || 2652 test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags)) 2653 goto st_out; 2654 2655 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, 2656 &dd->dd_flag))) 2657 goto st_out; 2658 2659 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); 2660 2661restart_eh: 2662 /* Demux bits: start with error handling */ 2663 if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) { 2664 mtip_handle_tfe(dd); 2665 clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); 2666 } 2667 2668 if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) 2669 goto restart_eh; 2670 2671 if (test_bit(MTIP_PF_TO_ACTIVE_BIT, &port->flags)) { 2672 to = jiffies + msecs_to_jiffies(5000); 2673 2674 do { 2675 mdelay(100); 2676 } while (atomic_read(&dd->irq_workers_active) != 0 && 2677 time_before(jiffies, to)); 2678 2679 if (atomic_read(&dd->irq_workers_active) != 0) 2680 dev_warn(&dd->pdev->dev, 2681 "Completion workers still active!"); 2682 2683 blk_mq_quiesce_queue(dd->queue); 2684 2685 blk_mq_tagset_busy_iter(&dd->tags, mtip_queue_cmd, dd); 2686 2687 set_bit(MTIP_PF_ISSUE_CMDS_BIT, &dd->port->flags); 2688 2689 if (mtip_device_reset(dd)) 2690 blk_mq_tagset_busy_iter(&dd->tags, 2691 mtip_abort_cmd, dd); 2692 2693 clear_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags); 2694 2695 blk_mq_unquiesce_queue(dd->queue); 2696 } 2697 2698 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { 2699 slot = 1; 2700 /* used to restrict the loop to one iteration */ 2701 slot_start = num_cmd_slots; 2702 slot_wrap = 0; 2703 while (1) { 2704 slot = find_next_bit(port->cmds_to_issue, 2705 num_cmd_slots, slot); 2706 if (slot_wrap == 1) { 2707 if ((slot_start >= slot) || 2708 (slot >= num_cmd_slots)) 2709 break; 2710 } 2711 if (unlikely(slot_start == num_cmd_slots)) 2712 slot_start = slot; 2713 2714 if (unlikely(slot == num_cmd_slots)) { 2715 slot = 1; 2716 slot_wrap = 1; 2717 continue; 2718 } 2719 2720 /* Issue the command to the hardware */ 2721 mtip_issue_ncq_command(port, slot); 2722 2723 clear_bit(slot, port->cmds_to_issue); 2724 } 2725 2726 clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); 2727 } 2728 2729 if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) { 2730 if (mtip_ftl_rebuild_poll(dd) == 0) 2731 clear_bit(MTIP_PF_REBUILD_BIT, &port->flags); 2732 } 2733 } 2734 2735st_out: 2736 return 0; 2737} 2738 2739/* 2740 * DMA region teardown 2741 * 2742 * @dd Pointer to driver_data structure 2743 * 2744 * return value 2745 * None 2746 */ 2747static void mtip_dma_free(struct driver_data *dd) 2748{ 2749 struct mtip_port *port = dd->port; 2750 2751 if (port->block1) 2752 dma_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ, 2753 port->block1, port->block1_dma); 2754 2755 if (port->command_list) { 2756 dma_free_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ, 2757 port->command_list, port->command_list_dma); 2758 } 2759} 2760 2761/* 2762 * DMA region setup 2763 * 2764 * @dd Pointer to driver_data structure 2765 * 2766 * return value 2767 * -ENOMEM Not enough free DMA region space to initialize driver 2768 */ 2769static int mtip_dma_alloc(struct driver_data *dd) 2770{ 2771 struct mtip_port *port = dd->port; 2772 2773 /* Allocate dma memory for RX Fis, Identify, and Sector Bufffer */ 2774 port->block1 = 2775 dma_alloc_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ, 2776 &port->block1_dma, GFP_KERNEL); 2777 if (!port->block1) 2778 return -ENOMEM; 2779 2780 /* Allocate dma memory for command list */ 2781 port->command_list = 2782 dma_alloc_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ, 2783 &port->command_list_dma, GFP_KERNEL); 2784 if (!port->command_list) { 2785 dma_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ, 2786 port->block1, port->block1_dma); 2787 port->block1 = NULL; 2788 port->block1_dma = 0; 2789 return -ENOMEM; 2790 } 2791 2792 /* Setup all pointers into first DMA region */ 2793 port->rxfis = port->block1 + AHCI_RX_FIS_OFFSET; 2794 port->rxfis_dma = port->block1_dma + AHCI_RX_FIS_OFFSET; 2795 port->identify = port->block1 + AHCI_IDFY_OFFSET; 2796 port->identify_dma = port->block1_dma + AHCI_IDFY_OFFSET; 2797 port->log_buf = port->block1 + AHCI_SECTBUF_OFFSET; 2798 port->log_buf_dma = port->block1_dma + AHCI_SECTBUF_OFFSET; 2799 port->smart_buf = port->block1 + AHCI_SMARTBUF_OFFSET; 2800 port->smart_buf_dma = port->block1_dma + AHCI_SMARTBUF_OFFSET; 2801 2802 return 0; 2803} 2804 2805static int mtip_hw_get_identify(struct driver_data *dd) 2806{ 2807 struct smart_attr attr242; 2808 unsigned char *buf; 2809 int rv; 2810 2811 if (mtip_get_identify(dd->port, NULL) < 0) 2812 return -EFAULT; 2813 2814 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == 2815 MTIP_FTL_REBUILD_MAGIC) { 2816 set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags); 2817 return MTIP_FTL_REBUILD_MAGIC; 2818 } 2819 mtip_dump_identify(dd->port); 2820 2821 /* check write protect, over temp and rebuild statuses */ 2822 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, 2823 dd->port->log_buf, 2824 dd->port->log_buf_dma, 1); 2825 if (rv) { 2826 dev_warn(&dd->pdev->dev, 2827 "Error in READ LOG EXT (10h) command\n"); 2828 /* non-critical error, don't fail the load */ 2829 } else { 2830 buf = (unsigned char *)dd->port->log_buf; 2831 if (buf[259] & 0x1) { 2832 dev_info(&dd->pdev->dev, 2833 "Write protect bit is set.\n"); 2834 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); 2835 } 2836 if (buf[288] == 0xF7) { 2837 dev_info(&dd->pdev->dev, 2838 "Exceeded Tmax, drive in thermal shutdown.\n"); 2839 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); 2840 } 2841 if (buf[288] == 0xBF) { 2842 dev_info(&dd->pdev->dev, 2843 "Drive indicates rebuild has failed.\n"); 2844 set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag); 2845 } 2846 } 2847 2848 /* get write protect progess */ 2849 memset(&attr242, 0, sizeof(struct smart_attr)); 2850 if (mtip_get_smart_attr(dd->port, 242, &attr242)) 2851 dev_warn(&dd->pdev->dev, 2852 "Unable to check write protect progress\n"); 2853 else 2854 dev_info(&dd->pdev->dev, 2855 "Write protect progress: %u%% (%u blocks)\n", 2856 attr242.cur, le32_to_cpu(attr242.data)); 2857 2858 return rv; 2859} 2860 2861/* 2862 * Called once for each card. 2863 * 2864 * @dd Pointer to the driver data structure. 2865 * 2866 * return value 2867 * 0 on success, else an error code. 2868 */ 2869static int mtip_hw_init(struct driver_data *dd) 2870{ 2871 int i; 2872 int rv; 2873 unsigned long timeout, timetaken; 2874 2875 dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR]; 2876 2877 mtip_detect_product(dd); 2878 if (dd->product_type == MTIP_PRODUCT_UNKNOWN) { 2879 rv = -EIO; 2880 goto out1; 2881 } 2882 2883 hba_setup(dd); 2884 2885 dd->port = kzalloc_node(sizeof(struct mtip_port), GFP_KERNEL, 2886 dd->numa_node); 2887 if (!dd->port) { 2888 dev_err(&dd->pdev->dev, 2889 "Memory allocation: port structure\n"); 2890 return -ENOMEM; 2891 } 2892 2893 /* Continue workqueue setup */ 2894 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++) 2895 dd->work[i].port = dd->port; 2896 2897 /* Enable unaligned IO constraints for some devices */ 2898 if (mtip_device_unaligned_constrained(dd)) 2899 dd->unal_qdepth = MTIP_MAX_UNALIGNED_SLOTS; 2900 else 2901 dd->unal_qdepth = 0; 2902 2903 atomic_set(&dd->port->cmd_slot_unal, dd->unal_qdepth); 2904 2905 /* Spinlock to prevent concurrent issue */ 2906 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++) 2907 spin_lock_init(&dd->port->cmd_issue_lock[i]); 2908 2909 /* Set the port mmio base address. */ 2910 dd->port->mmio = dd->mmio + PORT_OFFSET; 2911 dd->port->dd = dd; 2912 2913 /* DMA allocations */ 2914 rv = mtip_dma_alloc(dd); 2915 if (rv < 0) 2916 goto out1; 2917 2918 /* Setup the pointers to the extended s_active and CI registers. */ 2919 for (i = 0; i < dd->slot_groups; i++) { 2920 dd->port->s_active[i] = 2921 dd->port->mmio + i*0x80 + PORT_SCR_ACT; 2922 dd->port->cmd_issue[i] = 2923 dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE; 2924 dd->port->completed[i] = 2925 dd->port->mmio + i*0x80 + PORT_SDBV; 2926 } 2927 2928 timetaken = jiffies; 2929 timeout = jiffies + msecs_to_jiffies(30000); 2930 while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) && 2931 time_before(jiffies, timeout)) { 2932 mdelay(100); 2933 } 2934 if (unlikely(mtip_check_surprise_removal(dd->pdev))) { 2935 timetaken = jiffies - timetaken; 2936 dev_warn(&dd->pdev->dev, 2937 "Surprise removal detected at %u ms\n", 2938 jiffies_to_msecs(timetaken)); 2939 rv = -ENODEV; 2940 goto out2 ; 2941 } 2942 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) { 2943 timetaken = jiffies - timetaken; 2944 dev_warn(&dd->pdev->dev, 2945 "Removal detected at %u ms\n", 2946 jiffies_to_msecs(timetaken)); 2947 rv = -EFAULT; 2948 goto out2; 2949 } 2950 2951 /* Conditionally reset the HBA. */ 2952 if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) { 2953 if (mtip_hba_reset(dd) < 0) { 2954 dev_err(&dd->pdev->dev, 2955 "Card did not reset within timeout\n"); 2956 rv = -EIO; 2957 goto out2; 2958 } 2959 } else { 2960 /* Clear any pending interrupts on the HBA */ 2961 writel(readl(dd->mmio + HOST_IRQ_STAT), 2962 dd->mmio + HOST_IRQ_STAT); 2963 } 2964 2965 mtip_init_port(dd->port); 2966 mtip_start_port(dd->port); 2967 2968 /* Setup the ISR and enable interrupts. */ 2969 rv = request_irq(dd->pdev->irq, mtip_irq_handler, IRQF_SHARED, 2970 dev_driver_string(&dd->pdev->dev), dd); 2971 if (rv) { 2972 dev_err(&dd->pdev->dev, 2973 "Unable to allocate IRQ %d\n", dd->pdev->irq); 2974 goto out2; 2975 } 2976 irq_set_affinity_hint(dd->pdev->irq, get_cpu_mask(dd->isr_binding)); 2977 2978 /* Enable interrupts on the HBA. */ 2979 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, 2980 dd->mmio + HOST_CTL); 2981 2982 init_waitqueue_head(&dd->port->svc_wait); 2983 2984 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) { 2985 rv = -EFAULT; 2986 goto out3; 2987 } 2988 2989 return rv; 2990 2991out3: 2992 /* Disable interrupts on the HBA. */ 2993 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, 2994 dd->mmio + HOST_CTL); 2995 2996 /* Release the IRQ. */ 2997 irq_set_affinity_hint(dd->pdev->irq, NULL); 2998 free_irq(dd->pdev->irq, dd); 2999 3000out2: 3001 mtip_deinit_port(dd->port); 3002 mtip_dma_free(dd); 3003 3004out1: 3005 /* Free the memory allocated for the for structure. */ 3006 kfree(dd->port); 3007 3008 return rv; 3009} 3010 3011static int mtip_standby_drive(struct driver_data *dd) 3012{ 3013 int rv = 0; 3014 3015 if (dd->sr || !dd->port) 3016 return -ENODEV; 3017 /* 3018 * Send standby immediate (E0h) to the drive so that it 3019 * saves its state. 3020 */ 3021 if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags) && 3022 !test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag) && 3023 !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) { 3024 rv = mtip_standby_immediate(dd->port); 3025 if (rv) 3026 dev_warn(&dd->pdev->dev, 3027 "STANDBY IMMEDIATE failed\n"); 3028 } 3029 return rv; 3030} 3031 3032/* 3033 * Called to deinitialize an interface. 3034 * 3035 * @dd Pointer to the driver data structure. 3036 * 3037 * return value 3038 * 0 3039 */ 3040static int mtip_hw_exit(struct driver_data *dd) 3041{ 3042 if (!dd->sr) { 3043 /* de-initialize the port. */ 3044 mtip_deinit_port(dd->port); 3045 3046 /* Disable interrupts on the HBA. */ 3047 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, 3048 dd->mmio + HOST_CTL); 3049 } 3050 3051 /* Release the IRQ. */ 3052 irq_set_affinity_hint(dd->pdev->irq, NULL); 3053 free_irq(dd->pdev->irq, dd); 3054 msleep(1000); 3055 3056 /* Free dma regions */ 3057 mtip_dma_free(dd); 3058 3059 /* Free the memory allocated for the for structure. */ 3060 kfree(dd->port); 3061 dd->port = NULL; 3062 3063 return 0; 3064} 3065 3066/* 3067 * Issue a Standby Immediate command to the device. 3068 * 3069 * This function is called by the Block Layer just before the 3070 * system powers off during a shutdown. 3071 * 3072 * @dd Pointer to the driver data structure. 3073 * 3074 * return value 3075 * 0 3076 */ 3077static int mtip_hw_shutdown(struct driver_data *dd) 3078{ 3079 /* 3080 * Send standby immediate (E0h) to the drive so that it 3081 * saves its state. 3082 */ 3083 mtip_standby_drive(dd); 3084 3085 return 0; 3086} 3087 3088/* 3089 * Suspend function 3090 * 3091 * This function is called by the Block Layer just before the 3092 * system hibernates. 3093 * 3094 * @dd Pointer to the driver data structure. 3095 * 3096 * return value 3097 * 0 Suspend was successful 3098 * -EFAULT Suspend was not successful 3099 */ 3100static int mtip_hw_suspend(struct driver_data *dd) 3101{ 3102 /* 3103 * Send standby immediate (E0h) to the drive 3104 * so that it saves its state. 3105 */ 3106 if (mtip_standby_drive(dd) != 0) { 3107 dev_err(&dd->pdev->dev, 3108 "Failed standby-immediate command\n"); 3109 return -EFAULT; 3110 } 3111 3112 /* Disable interrupts on the HBA.*/ 3113 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, 3114 dd->mmio + HOST_CTL); 3115 mtip_deinit_port(dd->port); 3116 3117 return 0; 3118} 3119 3120/* 3121 * Resume function 3122 * 3123 * This function is called by the Block Layer as the 3124 * system resumes. 3125 * 3126 * @dd Pointer to the driver data structure. 3127 * 3128 * return value 3129 * 0 Resume was successful 3130 * -EFAULT Resume was not successful 3131 */ 3132static int mtip_hw_resume(struct driver_data *dd) 3133{ 3134 /* Perform any needed hardware setup steps */ 3135 hba_setup(dd); 3136 3137 /* Reset the HBA */ 3138 if (mtip_hba_reset(dd) != 0) { 3139 dev_err(&dd->pdev->dev, 3140 "Unable to reset the HBA\n"); 3141 return -EFAULT; 3142 } 3143 3144 /* 3145 * Enable the port, DMA engine, and FIS reception specific 3146 * h/w in controller. 3147 */ 3148 mtip_init_port(dd->port); 3149 mtip_start_port(dd->port); 3150 3151 /* Enable interrupts on the HBA.*/ 3152 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, 3153 dd->mmio + HOST_CTL); 3154 3155 return 0; 3156} 3157 3158/* 3159 * Helper function for reusing disk name 3160 * upon hot insertion. 3161 */ 3162static int rssd_disk_name_format(char *prefix, 3163 int index, 3164 char *buf, 3165 int buflen) 3166{ 3167 const int base = 'z' - 'a' + 1; 3168 char *begin = buf + strlen(prefix); 3169 char *end = buf + buflen; 3170 char *p; 3171 int unit; 3172 3173 p = end - 1; 3174 *p = '\0'; 3175 unit = base; 3176 do { 3177 if (p == begin) 3178 return -EINVAL; 3179 *--p = 'a' + (index % unit); 3180 index = (index / unit) - 1; 3181 } while (index >= 0); 3182 3183 memmove(begin, p, end - p); 3184 memcpy(buf, prefix, strlen(prefix)); 3185 3186 return 0; 3187} 3188 3189/* 3190 * Block layer IOCTL handler. 3191 * 3192 * @dev Pointer to the block_device structure. 3193 * @mode ignored 3194 * @cmd IOCTL command passed from the user application. 3195 * @arg Argument passed from the user application. 3196 * 3197 * return value 3198 * 0 IOCTL completed successfully. 3199 * -ENOTTY IOCTL not supported or invalid driver data 3200 * structure pointer. 3201 */ 3202static int mtip_block_ioctl(struct block_device *dev, 3203 fmode_t mode, 3204 unsigned cmd, 3205 unsigned long arg) 3206{ 3207 struct driver_data *dd = dev->bd_disk->private_data; 3208 3209 if (!capable(CAP_SYS_ADMIN)) 3210 return -EACCES; 3211 3212 if (!dd) 3213 return -ENOTTY; 3214 3215 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) 3216 return -ENOTTY; 3217 3218 switch (cmd) { 3219 case BLKFLSBUF: 3220 return -ENOTTY; 3221 default: 3222 return mtip_hw_ioctl(dd, cmd, arg); 3223 } 3224} 3225 3226#ifdef CONFIG_COMPAT 3227/* 3228 * Block layer compat IOCTL handler. 3229 * 3230 * @dev Pointer to the block_device structure. 3231 * @mode ignored 3232 * @cmd IOCTL command passed from the user application. 3233 * @arg Argument passed from the user application. 3234 * 3235 * return value 3236 * 0 IOCTL completed successfully. 3237 * -ENOTTY IOCTL not supported or invalid driver data 3238 * structure pointer. 3239 */ 3240static int mtip_block_compat_ioctl(struct block_device *dev, 3241 fmode_t mode, 3242 unsigned cmd, 3243 unsigned long arg) 3244{ 3245 struct driver_data *dd = dev->bd_disk->private_data; 3246 3247 if (!capable(CAP_SYS_ADMIN)) 3248 return -EACCES; 3249 3250 if (!dd) 3251 return -ENOTTY; 3252 3253 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) 3254 return -ENOTTY; 3255 3256 switch (cmd) { 3257 case BLKFLSBUF: 3258 return -ENOTTY; 3259 case HDIO_DRIVE_TASKFILE: { 3260 struct mtip_compat_ide_task_request_s __user *compat_req_task; 3261 ide_task_request_t req_task; 3262 int compat_tasksize, outtotal, ret; 3263 3264 compat_tasksize = 3265 sizeof(struct mtip_compat_ide_task_request_s); 3266 3267 compat_req_task = 3268 (struct mtip_compat_ide_task_request_s __user *) arg; 3269 3270 if (copy_from_user(&req_task, (void __user *) arg, 3271 compat_tasksize - (2 * sizeof(compat_long_t)))) 3272 return -EFAULT; 3273 3274 if (get_user(req_task.out_size, &compat_req_task->out_size)) 3275 return -EFAULT; 3276 3277 if (get_user(req_task.in_size, &compat_req_task->in_size)) 3278 return -EFAULT; 3279 3280 outtotal = sizeof(struct mtip_compat_ide_task_request_s); 3281 3282 ret = exec_drive_taskfile(dd, (void __user *) arg, 3283 &req_task, outtotal); 3284 3285 if (copy_to_user((void __user *) arg, &req_task, 3286 compat_tasksize - 3287 (2 * sizeof(compat_long_t)))) 3288 return -EFAULT; 3289 3290 if (put_user(req_task.out_size, &compat_req_task->out_size)) 3291 return -EFAULT; 3292 3293 if (put_user(req_task.in_size, &compat_req_task->in_size)) 3294 return -EFAULT; 3295 3296 return ret; 3297 } 3298 default: 3299 return mtip_hw_ioctl(dd, cmd, arg); 3300 } 3301} 3302#endif 3303 3304/* 3305 * Obtain the geometry of the device. 3306 * 3307 * You may think that this function is obsolete, but some applications, 3308 * fdisk for example still used CHS values. This function describes the 3309 * device as having 224 heads and 56 sectors per cylinder. These values are 3310 * chosen so that each cylinder is aligned on a 4KB boundary. Since a 3311 * partition is described in terms of a start and end cylinder this means 3312 * that each partition is also 4KB aligned. Non-aligned partitions adversely 3313 * affects performance. 3314 * 3315 * @dev Pointer to the block_device strucutre. 3316 * @geo Pointer to a hd_geometry structure. 3317 * 3318 * return value 3319 * 0 Operation completed successfully. 3320 * -ENOTTY An error occurred while reading the drive capacity. 3321 */ 3322static int mtip_block_getgeo(struct block_device *dev, 3323 struct hd_geometry *geo) 3324{ 3325 struct driver_data *dd = dev->bd_disk->private_data; 3326 sector_t capacity; 3327 3328 if (!dd) 3329 return -ENOTTY; 3330 3331 if (!(mtip_hw_get_capacity(dd, &capacity))) { 3332 dev_warn(&dd->pdev->dev, 3333 "Could not get drive capacity.\n"); 3334 return -ENOTTY; 3335 } 3336 3337 geo->heads = 224; 3338 geo->sectors = 56; 3339 sector_div(capacity, (geo->heads * geo->sectors)); 3340 geo->cylinders = capacity; 3341 return 0; 3342} 3343 3344static int mtip_block_open(struct block_device *dev, fmode_t mode) 3345{ 3346 struct driver_data *dd; 3347 3348 if (dev && dev->bd_disk) { 3349 dd = (struct driver_data *) dev->bd_disk->private_data; 3350 3351 if (dd) { 3352 if (test_bit(MTIP_DDF_REMOVAL_BIT, 3353 &dd->dd_flag)) { 3354 return -ENODEV; 3355 } 3356 return 0; 3357 } 3358 } 3359 return -ENODEV; 3360} 3361 3362static void mtip_block_release(struct gendisk *disk, fmode_t mode) 3363{ 3364} 3365 3366/* 3367 * Block device operation function. 3368 * 3369 * This structure contains pointers to the functions required by the block 3370 * layer. 3371 */ 3372static const struct block_device_operations mtip_block_ops = { 3373 .open = mtip_block_open, 3374 .release = mtip_block_release, 3375 .ioctl = mtip_block_ioctl, 3376#ifdef CONFIG_COMPAT 3377 .compat_ioctl = mtip_block_compat_ioctl, 3378#endif 3379 .getgeo = mtip_block_getgeo, 3380 .owner = THIS_MODULE 3381}; 3382 3383static inline bool is_se_active(struct driver_data *dd) 3384{ 3385 if (unlikely(test_bit(MTIP_PF_SE_ACTIVE_BIT, &dd->port->flags))) { 3386 if (dd->port->ic_pause_timer) { 3387 unsigned long to = dd->port->ic_pause_timer + 3388 msecs_to_jiffies(1000); 3389 if (time_after(jiffies, to)) { 3390 clear_bit(MTIP_PF_SE_ACTIVE_BIT, 3391 &dd->port->flags); 3392 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag); 3393 dd->port->ic_pause_timer = 0; 3394 wake_up_interruptible(&dd->port->svc_wait); 3395 return false; 3396 } 3397 } 3398 return true; 3399 } 3400 return false; 3401} 3402 3403static inline bool is_stopped(struct driver_data *dd, struct request *rq) 3404{ 3405 if (likely(!(dd->dd_flag & MTIP_DDF_STOP_IO))) 3406 return false; 3407 3408 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) 3409 return true; 3410 if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag)) 3411 return true; 3412 if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag) && 3413 rq_data_dir(rq)) 3414 return true; 3415 if (test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) 3416 return true; 3417 if (test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)) 3418 return true; 3419 3420 return false; 3421} 3422 3423static bool mtip_check_unal_depth(struct blk_mq_hw_ctx *hctx, 3424 struct request *rq) 3425{ 3426 struct driver_data *dd = hctx->queue->queuedata; 3427 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3428 3429 if (rq_data_dir(rq) == READ || !dd->unal_qdepth) 3430 return false; 3431 3432 /* 3433 * If unaligned depth must be limited on this controller, mark it 3434 * as unaligned if the IO isn't on a 4k boundary (start of length). 3435 */ 3436 if (blk_rq_sectors(rq) <= 64) { 3437 if ((blk_rq_pos(rq) & 7) || (blk_rq_sectors(rq) & 7)) 3438 cmd->unaligned = 1; 3439 } 3440 3441 if (cmd->unaligned && atomic_dec_if_positive(&dd->port->cmd_slot_unal) >= 0) 3442 return true; 3443 3444 return false; 3445} 3446 3447static blk_status_t mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx, 3448 struct request *rq) 3449{ 3450 struct driver_data *dd = hctx->queue->queuedata; 3451 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3452 struct mtip_int_cmd *icmd = cmd->icmd; 3453 struct mtip_cmd_hdr *hdr = 3454 dd->port->command_list + sizeof(struct mtip_cmd_hdr) * rq->tag; 3455 struct mtip_cmd_sg *command_sg; 3456 3457 if (mtip_commands_active(dd->port)) 3458 return BLK_STS_DEV_RESOURCE; 3459 3460 hdr->ctba = cpu_to_le32(cmd->command_dma & 0xFFFFFFFF); 3461 if (test_bit(MTIP_PF_HOST_CAP_64, &dd->port->flags)) 3462 hdr->ctbau = cpu_to_le32((cmd->command_dma >> 16) >> 16); 3463 /* Populate the SG list */ 3464 hdr->opts = cpu_to_le32(icmd->opts | icmd->fis_len); 3465 if (icmd->buf_len) { 3466 command_sg = cmd->command + AHCI_CMD_TBL_HDR_SZ; 3467 3468 command_sg->info = cpu_to_le32((icmd->buf_len-1) & 0x3FFFFF); 3469 command_sg->dba = cpu_to_le32(icmd->buffer & 0xFFFFFFFF); 3470 command_sg->dba_upper = 3471 cpu_to_le32((icmd->buffer >> 16) >> 16); 3472 3473 hdr->opts |= cpu_to_le32((1 << 16)); 3474 } 3475 3476 /* Populate the command header */ 3477 hdr->byte_count = 0; 3478 3479 blk_mq_start_request(rq); 3480 mtip_issue_non_ncq_command(dd->port, rq->tag); 3481 return 0; 3482} 3483 3484static blk_status_t mtip_queue_rq(struct blk_mq_hw_ctx *hctx, 3485 const struct blk_mq_queue_data *bd) 3486{ 3487 struct driver_data *dd = hctx->queue->queuedata; 3488 struct request *rq = bd->rq; 3489 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3490 3491 if (blk_rq_is_passthrough(rq)) 3492 return mtip_issue_reserved_cmd(hctx, rq); 3493 3494 if (unlikely(mtip_check_unal_depth(hctx, rq))) 3495 return BLK_STS_DEV_RESOURCE; 3496 3497 if (is_se_active(dd) || is_stopped(dd, rq)) 3498 return BLK_STS_IOERR; 3499 3500 blk_mq_start_request(rq); 3501 3502 mtip_hw_submit_io(dd, rq, cmd, hctx); 3503 return BLK_STS_OK; 3504} 3505 3506static void mtip_free_cmd(struct blk_mq_tag_set *set, struct request *rq, 3507 unsigned int hctx_idx) 3508{ 3509 struct driver_data *dd = set->driver_data; 3510 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3511 3512 if (!cmd->command) 3513 return; 3514 3515 dma_free_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ, cmd->command, 3516 cmd->command_dma); 3517} 3518 3519static int mtip_init_cmd(struct blk_mq_tag_set *set, struct request *rq, 3520 unsigned int hctx_idx, unsigned int numa_node) 3521{ 3522 struct driver_data *dd = set->driver_data; 3523 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3524 3525 cmd->command = dma_alloc_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ, 3526 &cmd->command_dma, GFP_KERNEL); 3527 if (!cmd->command) 3528 return -ENOMEM; 3529 3530 sg_init_table(cmd->sg, MTIP_MAX_SG); 3531 return 0; 3532} 3533 3534static enum blk_eh_timer_return mtip_cmd_timeout(struct request *req, 3535 bool reserved) 3536{ 3537 struct driver_data *dd = req->q->queuedata; 3538 3539 if (reserved) { 3540 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req); 3541 3542 cmd->status = BLK_STS_TIMEOUT; 3543 blk_mq_complete_request(req); 3544 return BLK_EH_DONE; 3545 } 3546 3547 if (test_bit(req->tag, dd->port->cmds_to_issue)) 3548 goto exit_handler; 3549 3550 if (test_and_set_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags)) 3551 goto exit_handler; 3552 3553 wake_up_interruptible(&dd->port->svc_wait); 3554exit_handler: 3555 return BLK_EH_RESET_TIMER; 3556} 3557 3558static const struct blk_mq_ops mtip_mq_ops = { 3559 .queue_rq = mtip_queue_rq, 3560 .init_request = mtip_init_cmd, 3561 .exit_request = mtip_free_cmd, 3562 .complete = mtip_softirq_done_fn, 3563 .timeout = mtip_cmd_timeout, 3564}; 3565 3566/* 3567 * Block layer initialization function. 3568 * 3569 * This function is called once by the PCI layer for each P320 3570 * device that is connected to the system. 3571 * 3572 * @dd Pointer to the driver data structure. 3573 * 3574 * return value 3575 * 0 on success else an error code. 3576 */ 3577static int mtip_block_initialize(struct driver_data *dd) 3578{ 3579 int rv = 0, wait_for_rebuild = 0; 3580 sector_t capacity; 3581 unsigned int index = 0; 3582 struct kobject *kobj; 3583 3584 if (dd->disk) 3585 goto skip_create_disk; /* hw init done, before rebuild */ 3586 3587 if (mtip_hw_init(dd)) { 3588 rv = -EINVAL; 3589 goto protocol_init_error; 3590 } 3591 3592 dd->disk = alloc_disk_node(MTIP_MAX_MINORS, dd->numa_node); 3593 if (dd->disk == NULL) { 3594 dev_err(&dd->pdev->dev, 3595 "Unable to allocate gendisk structure\n"); 3596 rv = -EINVAL; 3597 goto alloc_disk_error; 3598 } 3599 3600 rv = ida_alloc(&rssd_index_ida, GFP_KERNEL); 3601 if (rv < 0) 3602 goto ida_get_error; 3603 index = rv; 3604 3605 rv = rssd_disk_name_format("rssd", 3606 index, 3607 dd->disk->disk_name, 3608 DISK_NAME_LEN); 3609 if (rv) 3610 goto disk_index_error; 3611 3612 dd->disk->major = dd->major; 3613 dd->disk->first_minor = index * MTIP_MAX_MINORS; 3614 dd->disk->minors = MTIP_MAX_MINORS; 3615 dd->disk->fops = &mtip_block_ops; 3616 dd->disk->private_data = dd; 3617 dd->index = index; 3618 3619 mtip_hw_debugfs_init(dd); 3620 3621 memset(&dd->tags, 0, sizeof(dd->tags)); 3622 dd->tags.ops = &mtip_mq_ops; 3623 dd->tags.nr_hw_queues = 1; 3624 dd->tags.queue_depth = MTIP_MAX_COMMAND_SLOTS; 3625 dd->tags.reserved_tags = 1; 3626 dd->tags.cmd_size = sizeof(struct mtip_cmd); 3627 dd->tags.numa_node = dd->numa_node; 3628 dd->tags.flags = BLK_MQ_F_SHOULD_MERGE; 3629 dd->tags.driver_data = dd; 3630 dd->tags.timeout = MTIP_NCQ_CMD_TIMEOUT_MS; 3631 3632 rv = blk_mq_alloc_tag_set(&dd->tags); 3633 if (rv) { 3634 dev_err(&dd->pdev->dev, 3635 "Unable to allocate request queue\n"); 3636 goto block_queue_alloc_tag_error; 3637 } 3638 3639 /* Allocate the request queue. */ 3640 dd->queue = blk_mq_init_queue(&dd->tags); 3641 if (IS_ERR(dd->queue)) { 3642 dev_err(&dd->pdev->dev, 3643 "Unable to allocate request queue\n"); 3644 rv = -ENOMEM; 3645 goto block_queue_alloc_init_error; 3646 } 3647 3648 dd->disk->queue = dd->queue; 3649 dd->queue->queuedata = dd; 3650 3651skip_create_disk: 3652 /* Initialize the protocol layer. */ 3653 wait_for_rebuild = mtip_hw_get_identify(dd); 3654 if (wait_for_rebuild < 0) { 3655 dev_err(&dd->pdev->dev, 3656 "Protocol layer initialization failed\n"); 3657 rv = -EINVAL; 3658 goto init_hw_cmds_error; 3659 } 3660 3661 /* 3662 * if rebuild pending, start the service thread, and delay the block 3663 * queue creation and device_add_disk() 3664 */ 3665 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) 3666 goto start_service_thread; 3667 3668 /* Set device limits. */ 3669 blk_queue_flag_set(QUEUE_FLAG_NONROT, dd->queue); 3670 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, dd->queue); 3671 blk_queue_max_segments(dd->queue, MTIP_MAX_SG); 3672 blk_queue_physical_block_size(dd->queue, 4096); 3673 blk_queue_max_hw_sectors(dd->queue, 0xffff); 3674 blk_queue_max_segment_size(dd->queue, 0x400000); 3675 dma_set_max_seg_size(&dd->pdev->dev, 0x400000); 3676 blk_queue_io_min(dd->queue, 4096); 3677 3678 /* Set the capacity of the device in 512 byte sectors. */ 3679 if (!(mtip_hw_get_capacity(dd, &capacity))) { 3680 dev_warn(&dd->pdev->dev, 3681 "Could not read drive capacity\n"); 3682 rv = -EIO; 3683 goto read_capacity_error; 3684 } 3685 set_capacity(dd->disk, capacity); 3686 3687 /* Enable the block device and add it to /dev */ 3688 device_add_disk(&dd->pdev->dev, dd->disk, NULL); 3689 3690 dd->bdev = bdget_disk(dd->disk, 0); 3691 /* 3692 * Now that the disk is active, initialize any sysfs attributes 3693 * managed by the protocol layer. 3694 */ 3695 kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); 3696 if (kobj) { 3697 mtip_hw_sysfs_init(dd, kobj); 3698 kobject_put(kobj); 3699 } 3700 3701 if (dd->mtip_svc_handler) { 3702 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); 3703 return rv; /* service thread created for handling rebuild */ 3704 } 3705 3706start_service_thread: 3707 dd->mtip_svc_handler = kthread_create_on_node(mtip_service_thread, 3708 dd, dd->numa_node, 3709 "mtip_svc_thd_%02d", index); 3710 3711 if (IS_ERR(dd->mtip_svc_handler)) { 3712 dev_err(&dd->pdev->dev, "service thread failed to start\n"); 3713 dd->mtip_svc_handler = NULL; 3714 rv = -EFAULT; 3715 goto kthread_run_error; 3716 } 3717 wake_up_process(dd->mtip_svc_handler); 3718 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) 3719 rv = wait_for_rebuild; 3720 3721 return rv; 3722 3723kthread_run_error: 3724 bdput(dd->bdev); 3725 dd->bdev = NULL; 3726 3727 /* Delete our gendisk. This also removes the device from /dev */ 3728 del_gendisk(dd->disk); 3729 3730read_capacity_error: 3731init_hw_cmds_error: 3732 blk_cleanup_queue(dd->queue); 3733block_queue_alloc_init_error: 3734 blk_mq_free_tag_set(&dd->tags); 3735block_queue_alloc_tag_error: 3736 mtip_hw_debugfs_exit(dd); 3737disk_index_error: 3738 ida_free(&rssd_index_ida, index); 3739 3740ida_get_error: 3741 put_disk(dd->disk); 3742 3743alloc_disk_error: 3744 mtip_hw_exit(dd); /* De-initialize the protocol layer. */ 3745 3746protocol_init_error: 3747 return rv; 3748} 3749 3750static bool mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv) 3751{ 3752 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq); 3753 3754 cmd->status = BLK_STS_IOERR; 3755 blk_mq_complete_request(rq); 3756 return true; 3757} 3758 3759/* 3760 * Block layer deinitialization function. 3761 * 3762 * Called by the PCI layer as each P320 device is removed. 3763 * 3764 * @dd Pointer to the driver data structure. 3765 * 3766 * return value 3767 * 0 3768 */ 3769static int mtip_block_remove(struct driver_data *dd) 3770{ 3771 struct kobject *kobj; 3772 3773 mtip_hw_debugfs_exit(dd); 3774 3775 if (dd->mtip_svc_handler) { 3776 set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags); 3777 wake_up_interruptible(&dd->port->svc_wait); 3778 kthread_stop(dd->mtip_svc_handler); 3779 } 3780 3781 /* Clean up the sysfs attributes, if created */ 3782 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) { 3783 kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); 3784 if (kobj) { 3785 mtip_hw_sysfs_exit(dd, kobj); 3786 kobject_put(kobj); 3787 } 3788 } 3789 3790 if (!dd->sr) { 3791 /* 3792 * Explicitly wait here for IOs to quiesce, 3793 * as mtip_standby_drive usually won't wait for IOs. 3794 */ 3795 if (!mtip_quiesce_io(dd->port, MTIP_QUIESCE_IO_TIMEOUT_MS)) 3796 mtip_standby_drive(dd); 3797 } 3798 else 3799 dev_info(&dd->pdev->dev, "device %s surprise removal\n", 3800 dd->disk->disk_name); 3801 3802 blk_freeze_queue_start(dd->queue); 3803 blk_mq_quiesce_queue(dd->queue); 3804 blk_mq_tagset_busy_iter(&dd->tags, mtip_no_dev_cleanup, dd); 3805 blk_mq_unquiesce_queue(dd->queue); 3806 3807 /* 3808 * Delete our gendisk structure. This also removes the device 3809 * from /dev 3810 */ 3811 if (dd->bdev) { 3812 bdput(dd->bdev); 3813 dd->bdev = NULL; 3814 } 3815 if (dd->disk) { 3816 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) 3817 del_gendisk(dd->disk); 3818 if (dd->disk->queue) { 3819 blk_cleanup_queue(dd->queue); 3820 blk_mq_free_tag_set(&dd->tags); 3821 dd->queue = NULL; 3822 } 3823 put_disk(dd->disk); 3824 } 3825 dd->disk = NULL; 3826 3827 ida_free(&rssd_index_ida, dd->index); 3828 3829 /* De-initialize the protocol layer. */ 3830 mtip_hw_exit(dd); 3831 3832 return 0; 3833} 3834 3835/* 3836 * Function called by the PCI layer when just before the 3837 * machine shuts down. 3838 * 3839 * If a protocol layer shutdown function is present it will be called 3840 * by this function. 3841 * 3842 * @dd Pointer to the driver data structure. 3843 * 3844 * return value 3845 * 0 3846 */ 3847static int mtip_block_shutdown(struct driver_data *dd) 3848{ 3849 mtip_hw_shutdown(dd); 3850 3851 /* Delete our gendisk structure, and cleanup the blk queue. */ 3852 if (dd->disk) { 3853 dev_info(&dd->pdev->dev, 3854 "Shutting down %s ...\n", dd->disk->disk_name); 3855 3856 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) 3857 del_gendisk(dd->disk); 3858 if (dd->disk->queue) { 3859 blk_cleanup_queue(dd->queue); 3860 blk_mq_free_tag_set(&dd->tags); 3861 } 3862 put_disk(dd->disk); 3863 dd->disk = NULL; 3864 dd->queue = NULL; 3865 } 3866 3867 ida_free(&rssd_index_ida, dd->index); 3868 return 0; 3869} 3870 3871static int mtip_block_suspend(struct driver_data *dd) 3872{ 3873 dev_info(&dd->pdev->dev, 3874 "Suspending %s ...\n", dd->disk->disk_name); 3875 mtip_hw_suspend(dd); 3876 return 0; 3877} 3878 3879static int mtip_block_resume(struct driver_data *dd) 3880{ 3881 dev_info(&dd->pdev->dev, "Resuming %s ...\n", 3882 dd->disk->disk_name); 3883 mtip_hw_resume(dd); 3884 return 0; 3885} 3886 3887static void drop_cpu(int cpu) 3888{ 3889 cpu_use[cpu]--; 3890} 3891 3892static int get_least_used_cpu_on_node(int node) 3893{ 3894 int cpu, least_used_cpu, least_cnt; 3895 const struct cpumask *node_mask; 3896 3897 node_mask = cpumask_of_node(node); 3898 least_used_cpu = cpumask_first(node_mask); 3899 least_cnt = cpu_use[least_used_cpu]; 3900 cpu = least_used_cpu; 3901 3902 for_each_cpu(cpu, node_mask) { 3903 if (cpu_use[cpu] < least_cnt) { 3904 least_used_cpu = cpu; 3905 least_cnt = cpu_use[cpu]; 3906 } 3907 } 3908 cpu_use[least_used_cpu]++; 3909 return least_used_cpu; 3910} 3911 3912/* Helper for selecting a node in round robin mode */ 3913static inline int mtip_get_next_rr_node(void) 3914{ 3915 static int next_node = NUMA_NO_NODE; 3916 3917 if (next_node == NUMA_NO_NODE) { 3918 next_node = first_online_node; 3919 return next_node; 3920 } 3921 3922 next_node = next_online_node(next_node); 3923 if (next_node == MAX_NUMNODES) 3924 next_node = first_online_node; 3925 return next_node; 3926} 3927 3928static DEFINE_HANDLER(0); 3929static DEFINE_HANDLER(1); 3930static DEFINE_HANDLER(2); 3931static DEFINE_HANDLER(3); 3932static DEFINE_HANDLER(4); 3933static DEFINE_HANDLER(5); 3934static DEFINE_HANDLER(6); 3935static DEFINE_HANDLER(7); 3936 3937static void mtip_disable_link_opts(struct driver_data *dd, struct pci_dev *pdev) 3938{ 3939 int pos; 3940 unsigned short pcie_dev_ctrl; 3941 3942 pos = pci_find_capability(pdev, PCI_CAP_ID_EXP); 3943 if (pos) { 3944 pci_read_config_word(pdev, 3945 pos + PCI_EXP_DEVCTL, 3946 &pcie_dev_ctrl); 3947 if (pcie_dev_ctrl & (1 << 11) || 3948 pcie_dev_ctrl & (1 << 4)) { 3949 dev_info(&dd->pdev->dev, 3950 "Disabling ERO/No-Snoop on bridge device %04x:%04x\n", 3951 pdev->vendor, pdev->device); 3952 pcie_dev_ctrl &= ~(PCI_EXP_DEVCTL_NOSNOOP_EN | 3953 PCI_EXP_DEVCTL_RELAX_EN); 3954 pci_write_config_word(pdev, 3955 pos + PCI_EXP_DEVCTL, 3956 pcie_dev_ctrl); 3957 } 3958 } 3959} 3960 3961static void mtip_fix_ero_nosnoop(struct driver_data *dd, struct pci_dev *pdev) 3962{ 3963 /* 3964 * This workaround is specific to AMD/ATI chipset with a PCI upstream 3965 * device with device id 0x5aXX 3966 */ 3967 if (pdev->bus && pdev->bus->self) { 3968 if (pdev->bus->self->vendor == PCI_VENDOR_ID_ATI && 3969 ((pdev->bus->self->device & 0xff00) == 0x5a00)) { 3970 mtip_disable_link_opts(dd, pdev->bus->self); 3971 } else { 3972 /* Check further up the topology */ 3973 struct pci_dev *parent_dev = pdev->bus->self; 3974 if (parent_dev->bus && 3975 parent_dev->bus->parent && 3976 parent_dev->bus->parent->self && 3977 parent_dev->bus->parent->self->vendor == 3978 PCI_VENDOR_ID_ATI && 3979 (parent_dev->bus->parent->self->device & 3980 0xff00) == 0x5a00) { 3981 mtip_disable_link_opts(dd, 3982 parent_dev->bus->parent->self); 3983 } 3984 } 3985 } 3986} 3987 3988/* 3989 * Called for each supported PCI device detected. 3990 * 3991 * This function allocates the private data structure, enables the 3992 * PCI device and then calls the block layer initialization function. 3993 * 3994 * return value 3995 * 0 on success else an error code. 3996 */ 3997static int mtip_pci_probe(struct pci_dev *pdev, 3998 const struct pci_device_id *ent) 3999{ 4000 int rv = 0; 4001 struct driver_data *dd = NULL; 4002 char cpu_list[256]; 4003 const struct cpumask *node_mask; 4004 int cpu, i = 0, j = 0; 4005 int my_node = NUMA_NO_NODE; 4006 unsigned long flags; 4007 4008 /* Allocate memory for this devices private data. */ 4009 my_node = pcibus_to_node(pdev->bus); 4010 if (my_node != NUMA_NO_NODE) { 4011 if (!node_online(my_node)) 4012 my_node = mtip_get_next_rr_node(); 4013 } else { 4014 dev_info(&pdev->dev, "Kernel not reporting proximity, choosing a node\n"); 4015 my_node = mtip_get_next_rr_node(); 4016 } 4017 dev_info(&pdev->dev, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n", 4018 my_node, pcibus_to_node(pdev->bus), dev_to_node(&pdev->dev), 4019 cpu_to_node(raw_smp_processor_id()), raw_smp_processor_id()); 4020 4021 dd = kzalloc_node(sizeof(struct driver_data), GFP_KERNEL, my_node); 4022 if (dd == NULL) { 4023 dev_err(&pdev->dev, 4024 "Unable to allocate memory for driver data\n"); 4025 return -ENOMEM; 4026 } 4027 4028 /* Attach the private data to this PCI device. */ 4029 pci_set_drvdata(pdev, dd); 4030 4031 rv = pcim_enable_device(pdev); 4032 if (rv < 0) { 4033 dev_err(&pdev->dev, "Unable to enable device\n"); 4034 goto iomap_err; 4035 } 4036 4037 /* Map BAR5 to memory. */ 4038 rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME); 4039 if (rv < 0) { 4040 dev_err(&pdev->dev, "Unable to map regions\n"); 4041 goto iomap_err; 4042 } 4043 4044 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 4045 if (rv) { 4046 dev_warn(&pdev->dev, "64-bit DMA enable failed\n"); 4047 goto setmask_err; 4048 } 4049 4050 /* Copy the info we may need later into the private data structure. */ 4051 dd->major = mtip_major; 4052 dd->instance = instance; 4053 dd->pdev = pdev; 4054 dd->numa_node = my_node; 4055 4056 INIT_LIST_HEAD(&dd->online_list); 4057 INIT_LIST_HEAD(&dd->remove_list); 4058 4059 memset(dd->workq_name, 0, 32); 4060 snprintf(dd->workq_name, 31, "mtipq%d", dd->instance); 4061 4062 dd->isr_workq = create_workqueue(dd->workq_name); 4063 if (!dd->isr_workq) { 4064 dev_warn(&pdev->dev, "Can't create wq %d\n", dd->instance); 4065 rv = -ENOMEM; 4066 goto setmask_err; 4067 } 4068 4069 memset(cpu_list, 0, sizeof(cpu_list)); 4070 4071 node_mask = cpumask_of_node(dd->numa_node); 4072 if (!cpumask_empty(node_mask)) { 4073 for_each_cpu(cpu, node_mask) 4074 { 4075 snprintf(&cpu_list[j], 256 - j, "%d ", cpu); 4076 j = strlen(cpu_list); 4077 } 4078 4079 dev_info(&pdev->dev, "Node %d on package %d has %d cpu(s): %s\n", 4080 dd->numa_node, 4081 topology_physical_package_id(cpumask_first(node_mask)), 4082 nr_cpus_node(dd->numa_node), 4083 cpu_list); 4084 } else 4085 dev_dbg(&pdev->dev, "mtip32xx: node_mask empty\n"); 4086 4087 dd->isr_binding = get_least_used_cpu_on_node(dd->numa_node); 4088 dev_info(&pdev->dev, "Initial IRQ binding node:cpu %d:%d\n", 4089 cpu_to_node(dd->isr_binding), dd->isr_binding); 4090 4091 /* first worker context always runs in ISR */ 4092 dd->work[0].cpu_binding = dd->isr_binding; 4093 dd->work[1].cpu_binding = get_least_used_cpu_on_node(dd->numa_node); 4094 dd->work[2].cpu_binding = get_least_used_cpu_on_node(dd->numa_node); 4095 dd->work[3].cpu_binding = dd->work[0].cpu_binding; 4096 dd->work[4].cpu_binding = dd->work[1].cpu_binding; 4097 dd->work[5].cpu_binding = dd->work[2].cpu_binding; 4098 dd->work[6].cpu_binding = dd->work[2].cpu_binding; 4099 dd->work[7].cpu_binding = dd->work[1].cpu_binding; 4100 4101 /* Log the bindings */ 4102 for_each_present_cpu(cpu) { 4103 memset(cpu_list, 0, sizeof(cpu_list)); 4104 for (i = 0, j = 0; i < MTIP_MAX_SLOT_GROUPS; i++) { 4105 if (dd->work[i].cpu_binding == cpu) { 4106 snprintf(&cpu_list[j], 256 - j, "%d ", i); 4107 j = strlen(cpu_list); 4108 } 4109 } 4110 if (j) 4111 dev_info(&pdev->dev, "CPU %d: WQs %s\n", cpu, cpu_list); 4112 } 4113 4114 INIT_WORK(&dd->work[0].work, mtip_workq_sdbf0); 4115 INIT_WORK(&dd->work[1].work, mtip_workq_sdbf1); 4116 INIT_WORK(&dd->work[2].work, mtip_workq_sdbf2); 4117 INIT_WORK(&dd->work[3].work, mtip_workq_sdbf3); 4118 INIT_WORK(&dd->work[4].work, mtip_workq_sdbf4); 4119 INIT_WORK(&dd->work[5].work, mtip_workq_sdbf5); 4120 INIT_WORK(&dd->work[6].work, mtip_workq_sdbf6); 4121 INIT_WORK(&dd->work[7].work, mtip_workq_sdbf7); 4122 4123 pci_set_master(pdev); 4124 rv = pci_enable_msi(pdev); 4125 if (rv) { 4126 dev_warn(&pdev->dev, 4127 "Unable to enable MSI interrupt.\n"); 4128 goto msi_initialize_err; 4129 } 4130 4131 mtip_fix_ero_nosnoop(dd, pdev); 4132 4133 /* Initialize the block layer. */ 4134 rv = mtip_block_initialize(dd); 4135 if (rv < 0) { 4136 dev_err(&pdev->dev, 4137 "Unable to initialize block layer\n"); 4138 goto block_initialize_err; 4139 } 4140 4141 /* 4142 * Increment the instance count so that each device has a unique 4143 * instance number. 4144 */ 4145 instance++; 4146 if (rv != MTIP_FTL_REBUILD_MAGIC) 4147 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); 4148 else 4149 rv = 0; /* device in rebuild state, return 0 from probe */ 4150 4151 /* Add to online list even if in ftl rebuild */ 4152 spin_lock_irqsave(&dev_lock, flags); 4153 list_add(&dd->online_list, &online_list); 4154 spin_unlock_irqrestore(&dev_lock, flags); 4155 4156 goto done; 4157 4158block_initialize_err: 4159 pci_disable_msi(pdev); 4160 4161msi_initialize_err: 4162 if (dd->isr_workq) { 4163 flush_workqueue(dd->isr_workq); 4164 destroy_workqueue(dd->isr_workq); 4165 drop_cpu(dd->work[0].cpu_binding); 4166 drop_cpu(dd->work[1].cpu_binding); 4167 drop_cpu(dd->work[2].cpu_binding); 4168 } 4169setmask_err: 4170 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); 4171 4172iomap_err: 4173 kfree(dd); 4174 pci_set_drvdata(pdev, NULL); 4175 return rv; 4176done: 4177 return rv; 4178} 4179 4180/* 4181 * Called for each probed device when the device is removed or the 4182 * driver is unloaded. 4183 * 4184 * return value 4185 * None 4186 */ 4187static void mtip_pci_remove(struct pci_dev *pdev) 4188{ 4189 struct driver_data *dd = pci_get_drvdata(pdev); 4190 unsigned long flags, to; 4191 4192 set_bit(MTIP_DDF_REMOVAL_BIT, &dd->dd_flag); 4193 4194 spin_lock_irqsave(&dev_lock, flags); 4195 list_del_init(&dd->online_list); 4196 list_add(&dd->remove_list, &removing_list); 4197 spin_unlock_irqrestore(&dev_lock, flags); 4198 4199 mtip_check_surprise_removal(pdev); 4200 synchronize_irq(dd->pdev->irq); 4201 4202 /* Spin until workers are done */ 4203 to = jiffies + msecs_to_jiffies(4000); 4204 do { 4205 msleep(20); 4206 } while (atomic_read(&dd->irq_workers_active) != 0 && 4207 time_before(jiffies, to)); 4208 4209 if (!dd->sr) 4210 fsync_bdev(dd->bdev); 4211 4212 if (atomic_read(&dd->irq_workers_active) != 0) { 4213 dev_warn(&dd->pdev->dev, 4214 "Completion workers still active!\n"); 4215 } 4216 4217 blk_set_queue_dying(dd->queue); 4218 set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag); 4219 4220 /* Clean up the block layer. */ 4221 mtip_block_remove(dd); 4222 4223 if (dd->isr_workq) { 4224 flush_workqueue(dd->isr_workq); 4225 destroy_workqueue(dd->isr_workq); 4226 drop_cpu(dd->work[0].cpu_binding); 4227 drop_cpu(dd->work[1].cpu_binding); 4228 drop_cpu(dd->work[2].cpu_binding); 4229 } 4230 4231 pci_disable_msi(pdev); 4232 4233 spin_lock_irqsave(&dev_lock, flags); 4234 list_del_init(&dd->remove_list); 4235 spin_unlock_irqrestore(&dev_lock, flags); 4236 4237 kfree(dd); 4238 4239 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); 4240 pci_set_drvdata(pdev, NULL); 4241} 4242 4243/* 4244 * Called for each probed device when the device is suspended. 4245 * 4246 * return value 4247 * 0 Success 4248 * <0 Error 4249 */ 4250static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) 4251{ 4252 int rv = 0; 4253 struct driver_data *dd = pci_get_drvdata(pdev); 4254 4255 if (!dd) { 4256 dev_err(&pdev->dev, 4257 "Driver private datastructure is NULL\n"); 4258 return -EFAULT; 4259 } 4260 4261 set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); 4262 4263 /* Disable ports & interrupts then send standby immediate */ 4264 rv = mtip_block_suspend(dd); 4265 if (rv < 0) { 4266 dev_err(&pdev->dev, 4267 "Failed to suspend controller\n"); 4268 return rv; 4269 } 4270 4271 /* 4272 * Save the pci config space to pdev structure & 4273 * disable the device 4274 */ 4275 pci_save_state(pdev); 4276 pci_disable_device(pdev); 4277 4278 /* Move to Low power state*/ 4279 pci_set_power_state(pdev, PCI_D3hot); 4280 4281 return rv; 4282} 4283 4284/* 4285 * Called for each probed device when the device is resumed. 4286 * 4287 * return value 4288 * 0 Success 4289 * <0 Error 4290 */ 4291static int mtip_pci_resume(struct pci_dev *pdev) 4292{ 4293 int rv = 0; 4294 struct driver_data *dd; 4295 4296 dd = pci_get_drvdata(pdev); 4297 if (!dd) { 4298 dev_err(&pdev->dev, 4299 "Driver private datastructure is NULL\n"); 4300 return -EFAULT; 4301 } 4302 4303 /* Move the device to active State */ 4304 pci_set_power_state(pdev, PCI_D0); 4305 4306 /* Restore PCI configuration space */ 4307 pci_restore_state(pdev); 4308 4309 /* Enable the PCI device*/ 4310 rv = pcim_enable_device(pdev); 4311 if (rv < 0) { 4312 dev_err(&pdev->dev, 4313 "Failed to enable card during resume\n"); 4314 goto err; 4315 } 4316 pci_set_master(pdev); 4317 4318 /* 4319 * Calls hbaReset, initPort, & startPort function 4320 * then enables interrupts 4321 */ 4322 rv = mtip_block_resume(dd); 4323 if (rv < 0) 4324 dev_err(&pdev->dev, "Unable to resume\n"); 4325 4326err: 4327 clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); 4328 4329 return rv; 4330} 4331 4332/* 4333 * Shutdown routine 4334 * 4335 * return value 4336 * None 4337 */ 4338static void mtip_pci_shutdown(struct pci_dev *pdev) 4339{ 4340 struct driver_data *dd = pci_get_drvdata(pdev); 4341 if (dd) 4342 mtip_block_shutdown(dd); 4343} 4344 4345/* Table of device ids supported by this driver. */ 4346static const struct pci_device_id mtip_pci_tbl[] = { 4347 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320H_DEVICE_ID) }, 4348 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320M_DEVICE_ID) }, 4349 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320S_DEVICE_ID) }, 4350 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P325M_DEVICE_ID) }, 4351 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420H_DEVICE_ID) }, 4352 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420M_DEVICE_ID) }, 4353 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P425M_DEVICE_ID) }, 4354 { 0 } 4355}; 4356 4357/* Structure that describes the PCI driver functions. */ 4358static struct pci_driver mtip_pci_driver = { 4359 .name = MTIP_DRV_NAME, 4360 .id_table = mtip_pci_tbl, 4361 .probe = mtip_pci_probe, 4362 .remove = mtip_pci_remove, 4363 .suspend = mtip_pci_suspend, 4364 .resume = mtip_pci_resume, 4365 .shutdown = mtip_pci_shutdown, 4366}; 4367 4368MODULE_DEVICE_TABLE(pci, mtip_pci_tbl); 4369 4370/* 4371 * Module initialization function. 4372 * 4373 * Called once when the module is loaded. This function allocates a major 4374 * block device number to the Cyclone devices and registers the PCI layer 4375 * of the driver. 4376 * 4377 * Return value 4378 * 0 on success else error code. 4379 */ 4380static int __init mtip_init(void) 4381{ 4382 int error; 4383 4384 pr_info(MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n"); 4385 4386 spin_lock_init(&dev_lock); 4387 4388 INIT_LIST_HEAD(&online_list); 4389 INIT_LIST_HEAD(&removing_list); 4390 4391 /* Allocate a major block device number to use with this driver. */ 4392 error = register_blkdev(0, MTIP_DRV_NAME); 4393 if (error <= 0) { 4394 pr_err("Unable to register block device (%d)\n", 4395 error); 4396 return -EBUSY; 4397 } 4398 mtip_major = error; 4399 4400 dfs_parent = debugfs_create_dir("rssd", NULL); 4401 if (IS_ERR_OR_NULL(dfs_parent)) { 4402 pr_warn("Error creating debugfs parent\n"); 4403 dfs_parent = NULL; 4404 } 4405 if (dfs_parent) { 4406 dfs_device_status = debugfs_create_file("device_status", 4407 0444, dfs_parent, NULL, 4408 &mtip_device_status_fops); 4409 if (IS_ERR_OR_NULL(dfs_device_status)) { 4410 pr_err("Error creating device_status node\n"); 4411 dfs_device_status = NULL; 4412 } 4413 } 4414 4415 /* Register our PCI operations. */ 4416 error = pci_register_driver(&mtip_pci_driver); 4417 if (error) { 4418 debugfs_remove(dfs_parent); 4419 unregister_blkdev(mtip_major, MTIP_DRV_NAME); 4420 } 4421 4422 return error; 4423} 4424 4425/* 4426 * Module de-initialization function. 4427 * 4428 * Called once when the module is unloaded. This function deallocates 4429 * the major block device number allocated by mtip_init() and 4430 * unregisters the PCI layer of the driver. 4431 * 4432 * Return value 4433 * none 4434 */ 4435static void __exit mtip_exit(void) 4436{ 4437 /* Release the allocated major block device number. */ 4438 unregister_blkdev(mtip_major, MTIP_DRV_NAME); 4439 4440 /* Unregister the PCI driver. */ 4441 pci_unregister_driver(&mtip_pci_driver); 4442 4443 debugfs_remove_recursive(dfs_parent); 4444} 4445 4446MODULE_AUTHOR("Micron Technology, Inc"); 4447MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver"); 4448MODULE_LICENSE("GPL"); 4449MODULE_VERSION(MTIP_DRV_VERSION); 4450 4451module_init(mtip_init); 4452module_exit(mtip_exit); 4453