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Looking up the datasheet: http://www.seagate.com/support/disc/manuals/sata/100402371a.pdf Looking further into page 47: Supported ATA commands The following table lists Serial ATA standard commands that the drive supports. For a detailed description of the ATA commands, refer to the Serial ATA: High Speed Serialized AT Attachment specification. See “S.M.A.R.T. commands” on page 44.for details and subcommands used in the S.M.A.R.T. implementation. A list of all the command supported is listed: Identify Device ECH Idle 97H or E3H which is inside drivers/ata/libata-eh.c: 2135 const char *ata_get_cmd_descript(u8 command) 2136 { 2137 #ifdef CONFIG_ATA_VERBOSE_ERROR 2138 static const struct 2139 { 2140 u8 command; 2141 const char *text; 2142 } cmd_descr[] = { 2143 { ATA_CMD_DEV_RESET, "DEVICE RESET" }, 2144 { ATA_CMD_CHK_POWER, "CHECK POWER MODE" }, 2145 { ATA_CMD_STANDBY, "STANDBY" }, 2146 { ATA_CMD_IDLE, "IDLE" }, 2147 { ATA_CMD_EDD, "EXECUTE DEVICE DIAGNOSTIC" }, 2148 { ATA_CMD_DOWNLOAD_MICRO, "DOWNLOAD MICROCODE" }, 2149 { ATA_CMD_NOP, "NOP" }, 2150 { ATA_CMD_FLUSH, "FLUSH CACHE" }, 2151 { ATA_CMD_FLUSH_EXT, "FLUSH CACHE EXT" }, 2152 { ATA_CMD_ID_ATA, "IDENTIFY DEVICE" },========================> 2153 { ATA_CMD_ID_ATAPI, "IDENTIFY PACKET DEVICE" }, and this is called inside libata-acpi.c: 663 /** 664 * ata_acpi_run_tf - send taskfile registers to host controller 665 * @dev: target ATA device 666 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) 667 * 668 * Outputs ATA taskfile to standard ATA host controller using MMIO 669 * or PIO as indicated by the ATA_FLAG_MMIO flag. 670 * Writes the control, feature, nsect, lbal, lbam, and lbah registers. 671 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, 672 * hob_lbal, hob_lbam, and hob_lbah. 673 * 674 * This function waits for idle (!BUSY and !DRQ) after writing 675 * registers. If the control register has a new value, this 676 * function also waits for idle after writing control and before 677 * writing the remaining registers. 678 * 679 * LOCKING: 680 * EH context. 681 * 682 * RETURNS: 683 * 1 if command is executed successfully. 0 if ignored, rejected or 684 * filtered out, -errno on other errors. 685 */ 686 static int ata_acpi_run_tf(struct ata_device *dev, 687 const struct ata_acpi_gtf *gtf, 688 const struct ata_acpi_gtf *prev_gtf) 689 { 690 struct ata_taskfile *pptf = NULL; 691 struct ata_taskfile tf, ptf, rtf; 692 unsigned int err_mask; 693 const char *level; 694 const char *descr; 695 char msg[60]; 696 int rc; 697 698 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) 699 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) 700 && (gtf->tf[6] == 0)) 701 return 0; 702 703 ata_acpi_gtf_to_tf(dev, gtf, &tf); 704 if (prev_gtf) { 705 ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); 706 pptf = &ptf; 707 } 708 709 if (!ata_acpi_filter_tf(dev, &tf, pptf)) { 710 rtf = tf; 711 err_mask = ata_exec_internal(dev, &rtf, NULL, 712 DMA_NONE, NULL, 0, 0); 713 714 switch (err_mask) { 715 case 0: 716 level = KERN_DEBUG; 717 snprintf(msg, sizeof(msg), "succeeded"); 718 rc = 1; 719 break; 720 721 case AC_ERR_DEV: 722 level = KERN_INFO; 723 snprintf(msg, sizeof(msg), 724 "rejected by device (Stat=0x%02x Err=0x%02x)", 725 rtf.command, rtf.feature); 726 rc = 0; 727 break; 728 729 default: 730 level = KERN_ERR; 731 snprintf(msg, sizeof(msg), 732 "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", 733 err_mask, rtf.command, rtf.feature); 734 rc = -EIO; 735 break; 736 } 737 } else { 738 level = KERN_INFO; 739 snprintf(msg, sizeof(msg), "filtered out"); 740 rc = 0; 741 } 742 descr = ata_get_cmd_descript(tf.command); 743 And the systemtap tracing: ata_scsi_queuecmd 0xffffffff8162c26d : ata_scsi_queuecmd+0x0/0x98 [kernel] 0xffffffff81515625 : scsi_dispatch_cmd+0x1e1/0x25f [kernel] 0xffffffff8151b43b : scsi_request_fn+0x3f2/0x53b [kernel] 0xffffffff813bb641 : __generic_unplug_device+0x35/0x39 [kernel] 0xffffffff813bb673 : generic_unplug_device+0x2e/0x3e [kernel] 0xffffffff813b63a6 : blk_unplug+0x48/0x4d [kernel] 0xffffffff813b63bd : blk_backing_dev_unplug+0x12/0x14 [kernel] 0xffffffff8114084f : sync_buffer+0x3e/0x47 [kernel] 0xffffffff81d9b33c : __wait_on_bit+0x4c/0x7e [kernel] 0xffffffff81d9b3dd : out_of_line_wait_on_bit+0x6f/0x7c [kernel] 0xffffffff81140774 : __wait_on_buffer+0x24/0x26 [kernel] 0xffffffff81205523 : wait_on_buffer+0x3d/0x41 [kernel] 0xffffffff81206138 : journal_commit_transaction+0xb42/0x117a [kernel] 0xffffffff8120961a : kjournald+0x102/0x25f [kernel] 0xffffffff81083c43 : kthread+0x9d/0xa5 [kernel] 0xffffffff81030634 : kernel_thread_helper+0x4/0x10 [kernel] 0xffffffff81d9d53c : restore_args+0x0/0x30 [kernel] (inexact) 0xffffffff81083ba6 : kthread+0x0/0xa5 [kernel] (inexact) 0xffffffff81030630 : kernel_thread_helper+0x0/0x10 [kernel] (inexact) ata_scsi_find_dev 0xffffffff816292b1 : ata_scsi_find_dev+0x0/0x39 [kernel] 0xffffffff8162c2b6 : ata_scsi_queuecmd+0x49/0x98 [kernel] 0xffffffff81515625 : scsi_dispatch_cmd+0x1e1/0x25f [kernel] 0xffffffff8151b43b : scsi_request_fn+0x3f2/0x53b [kernel] 0xffffffff813bb641 : __generic_unplug_device+0x35/0x39 [kernel] 0xffffffff813bb673 : generic_unplug_device+0x2e/0x3e [kernel] 0xffffffff813b63a6 : blk_unplug+0x48/0x4d [kernel] 0xffffffff813b63bd : blk_backing_dev_unplug+0x12/0x14 [kernel] 0xffffffff8114084f : sync_buffer+0x3e/0x47 [kernel] 0xffffffff81d9b33c : __wait_on_bit+0x4c/0x7e [kernel] 0xffffffff81d9b3dd : out_of_line_wait_on_bit+0x6f/0x7c [kernel] 0xffffffff81140774 : __wait_on_buffer+0x24/0x26 [kernel] 0xffffffff81205523 : wait_on_buffer+0x3d/0x41 [kernel] 0xffffffff81206138 : journal_commit_transaction+0xb42/0x117a [kernel] 0xffffffff8120961a : kjournald+0x102/0x25f [kernel] 0xffffffff81083c43 : kthread+0x9d/0xa5 [kernel] 0xffffffff81030634 : kernel_thread_helper+0x4/0x10 [kernel] 0xffffffff81d9d53c : restore_args+0x0/0x30 [kernel] (inexact) 0xffffffff81083ba6 : kthread+0x0/0xa5 [kernel] (inexact) 0xffffffff81030630 : kernel_thread_helper+0x0/0x10 [kernel] (inexact) __ata_scsi_find_dev 0xffffffff816291ff : __ata_scsi_find_dev+0x0/0xb2 [kernel] 0xffffffff816292bf : ata_scsi_find_dev+0xe/0x39 [kernel] 0xffffffff8162c2b6 : ata_scsi_queuecmd+0x49/0x98 [kernel] 0xffffffff81515625 : scsi_dispatch_cmd+0x1e1/0x25f [kernel] 0xffffffff8151b43b : scsi_request_fn+0x3f2/0x53b [kernel] 0xffffffff813bb641 : __generic_unplug_device+0x35/0x39 [kernel] which is output by: probe kernel.function("*...@drivers/ata/libata*.c") { printf("%s\n", probefunc()); print_backtrace(); printf("\n"); } To unsubscribe from this group, send email to linuxkernelnewbies+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject. |
