^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * IDE I/O functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Basic PIO and command management functionality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This code was split off from ide.c. See ide.c for history and original
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * copyrights.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This program is free software; you can redistribute it and/or modify it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * under the terms of the GNU General Public License as published by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Free Software Foundation; either version 2, or (at your option) any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * later version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * This program is distributed in the hope that it will be useful, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * For the avoidance of doubt the "preferred form" of this code is one which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * is in an open non patent encumbered format. Where cryptographic key signing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * forms part of the process of creating an executable the information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * including keys needed to generate an equivalently functional executable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * are deemed to be part of the source code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/major.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/genhd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/blkpg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <linux/ide.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/cdrom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/kmod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int ide_end_rq(ide_drive_t *drive, struct request *rq, blk_status_t error,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned int nr_bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * decide whether to reenable DMA -- 3 is a random magic for now,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * if we DMA timeout more than 3 times, just stay in PIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if ((drive->dev_flags & IDE_DFLAG_DMA_PIO_RETRY) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) drive->retry_pio <= 3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) drive->dev_flags &= ~IDE_DFLAG_DMA_PIO_RETRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) ide_dma_on(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (!blk_update_request(rq, error, nr_bytes)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (rq == drive->sense_rq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) drive->sense_rq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) drive->sense_rq_active = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) __blk_mq_end_request(rq, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) EXPORT_SYMBOL_GPL(ide_end_rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) void ide_complete_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat, u8 err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) const struct ide_tp_ops *tp_ops = drive->hwif->tp_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct ide_taskfile *tf = &cmd->tf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct request *rq = cmd->rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) u8 tf_cmd = tf->command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) tf->error = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) tf->status = stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (cmd->ftf_flags & IDE_FTFLAG_IN_DATA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) u8 data[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) tp_ops->input_data(drive, cmd, data, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) cmd->tf.data = data[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) cmd->hob.data = data[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) ide_tf_readback(drive, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if ((cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) tf_cmd == ATA_CMD_IDLEIMMEDIATE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (tf->lbal != 0xc4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) printk(KERN_ERR "%s: head unload failed!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) drive->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ide_tf_dump(drive->name, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) drive->dev_flags |= IDE_DFLAG_PARKED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (rq && ata_taskfile_request(rq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct ide_cmd *orig_cmd = ide_req(rq)->special;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (cmd->tf_flags & IDE_TFLAG_DYN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) kfree(orig_cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) else if (cmd != orig_cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) memcpy(orig_cmd, cmd, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) int ide_complete_rq(ide_drive_t *drive, blk_status_t error, unsigned int nr_bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ide_hwif_t *hwif = drive->hwif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct request *rq = hwif->rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * if failfast is set on a request, override number of sectors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * and complete the whole request right now
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (blk_noretry_request(rq) && error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) nr_bytes = blk_rq_sectors(rq) << 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) rc = ide_end_rq(drive, rq, error, nr_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (rc == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) hwif->rq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) EXPORT_SYMBOL(ide_complete_rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) void ide_kill_rq(ide_drive_t *drive, struct request *rq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) u8 drv_req = ata_misc_request(rq) && rq->rq_disk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) u8 media = drive->media;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) drive->failed_pc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if ((media == ide_floppy || media == ide_tape) && drv_req) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) scsi_req(rq)->result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (media == ide_tape)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) scsi_req(rq)->result = IDE_DRV_ERROR_GENERAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) else if (blk_rq_is_passthrough(rq) && scsi_req(rq)->result == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) scsi_req(rq)->result = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) ide_complete_rq(drive, BLK_STS_IOERR, blk_rq_bytes(rq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) tf->nsect = drive->sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) tf->lbal = drive->sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) tf->lbam = drive->cyl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) tf->lbah = drive->cyl >> 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) tf->device = (drive->head - 1) | drive->select;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) tf->command = ATA_CMD_INIT_DEV_PARAMS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static void ide_tf_set_restore_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) tf->nsect = drive->sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) tf->command = ATA_CMD_RESTORE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static void ide_tf_set_setmult_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) tf->nsect = drive->mult_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) tf->command = ATA_CMD_SET_MULTI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * do_special - issue some special commands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * @drive: drive the command is for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * do_special() is used to issue ATA_CMD_INIT_DEV_PARAMS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * ATA_CMD_RESTORE and ATA_CMD_SET_MULTI commands to a drive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static ide_startstop_t do_special(ide_drive_t *drive)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct ide_cmd cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) printk(KERN_DEBUG "%s: %s: 0x%02x\n", drive->name, __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) drive->special_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (drive->media != ide_disk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) drive->special_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) drive->mult_req = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return ide_stopped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) memset(&cmd, 0, sizeof(cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) cmd.protocol = ATA_PROT_NODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (drive->special_flags & IDE_SFLAG_SET_GEOMETRY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) drive->special_flags &= ~IDE_SFLAG_SET_GEOMETRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) ide_tf_set_specify_cmd(drive, &cmd.tf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) } else if (drive->special_flags & IDE_SFLAG_RECALIBRATE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) drive->special_flags &= ~IDE_SFLAG_RECALIBRATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) ide_tf_set_restore_cmd(drive, &cmd.tf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) } else if (drive->special_flags & IDE_SFLAG_SET_MULTMODE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) drive->special_flags &= ~IDE_SFLAG_SET_MULTMODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) ide_tf_set_setmult_cmd(drive, &cmd.tf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) cmd.tf_flags = IDE_TFLAG_CUSTOM_HANDLER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) do_rw_taskfile(drive, &cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return ide_started;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) void ide_map_sg(ide_drive_t *drive, struct ide_cmd *cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) ide_hwif_t *hwif = drive->hwif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct scatterlist *sg = hwif->sg_table, *last_sg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct request *rq = cmd->rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) cmd->sg_nents = __blk_rq_map_sg(drive->queue, rq, sg, &last_sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (blk_rq_bytes(rq) && (blk_rq_bytes(rq) & rq->q->dma_pad_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) last_sg->length +=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) (rq->q->dma_pad_mask & ~blk_rq_bytes(rq)) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) EXPORT_SYMBOL_GPL(ide_map_sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) void ide_init_sg_cmd(struct ide_cmd *cmd, unsigned int nr_bytes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) cmd->nbytes = cmd->nleft = nr_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) cmd->cursg_ofs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) cmd->cursg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) EXPORT_SYMBOL_GPL(ide_init_sg_cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * execute_drive_command - issue special drive command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * @drive: the drive to issue the command on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * @rq: the request structure holding the command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * execute_drive_cmd() issues a special drive command, usually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) * initiated by ioctl() from the external hdparm program. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * command can be a drive command, drive task or taskfile
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * operation. Weirdly you can call it with NULL to wait for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * all commands to finish. Don't do this as that is due to change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct request *rq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct ide_cmd *cmd = ide_req(rq)->special;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (cmd->protocol == ATA_PROT_PIO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) ide_init_sg_cmd(cmd, blk_rq_sectors(rq) << 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) ide_map_sg(drive, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return do_rw_taskfile(drive, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * NULL is actually a valid way of waiting for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * all current requests to be flushed from the queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) printk("%s: DRIVE_CMD (null)\n", drive->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) scsi_req(rq)->result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) ide_complete_rq(drive, BLK_STS_OK, blk_rq_bytes(rq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return ide_stopped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static ide_startstop_t ide_special_rq(ide_drive_t *drive, struct request *rq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) u8 cmd = scsi_req(rq)->cmd[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) case REQ_PARK_HEADS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) case REQ_UNPARK_HEADS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return ide_do_park_unpark(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) case REQ_DEVSET_EXEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return ide_do_devset(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) case REQ_DRIVE_RESET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) return ide_do_reset(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * start_request - start of I/O and command issuing for IDE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * start_request() initiates handling of a new I/O request. It
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * accepts commands and I/O (read/write) requests.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * FIXME: this function needs a rename
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) ide_startstop_t startstop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) printk("%s: start_request: current=0x%08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) drive->hwif->name, (unsigned long) rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) /* bail early if we've exceeded max_failures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (drive->max_failures && (drive->failures > drive->max_failures)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) rq->rq_flags |= RQF_FAILED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) goto kill_rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (drive->prep_rq && !drive->prep_rq(drive, rq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return ide_stopped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) if (ata_pm_request(rq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) ide_check_pm_state(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) drive->hwif->tp_ops->dev_select(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (ide_wait_stat(&startstop, drive, drive->ready_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) ATA_BUSY | ATA_DRQ, WAIT_READY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) printk(KERN_ERR "%s: drive not ready for command\n", drive->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return startstop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (drive->special_flags == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) struct ide_driver *drv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * We reset the drive so we need to issue a SETFEATURES.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * Do it _after_ do_special() restored device parameters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (drive->current_speed == 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) ide_config_drive_speed(drive, drive->desired_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (ata_taskfile_request(rq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) return execute_drive_cmd(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) else if (ata_pm_request(rq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) struct ide_pm_state *pm = ide_req(rq)->special;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) #ifdef DEBUG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) printk("%s: start_power_step(step: %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) drive->name, pm->pm_step);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) startstop = ide_start_power_step(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (startstop == ide_stopped &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) pm->pm_step == IDE_PM_COMPLETED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) ide_complete_pm_rq(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return startstop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) } else if (!rq->rq_disk && ata_misc_request(rq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * TODO: Once all ULDs have been modified to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * check for specific op codes rather than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * blindly accepting any special request, the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * check for ->rq_disk above may be replaced
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * by a more suitable mechanism or even
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) * dropped entirely.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return ide_special_rq(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) drv = *(struct ide_driver **)rq->rq_disk->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) return drv->do_request(drive, rq, blk_rq_pos(rq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return do_special(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) kill_rq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) ide_kill_rq(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return ide_stopped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) * ide_stall_queue - pause an IDE device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * @drive: drive to stall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) * @timeout: time to stall for (jiffies)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) * ide_stall_queue() can be used by a drive to give excess bandwidth back
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) * to the port by sleeping for timeout jiffies.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) void ide_stall_queue (ide_drive_t *drive, unsigned long timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (timeout > WAIT_WORSTCASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) timeout = WAIT_WORSTCASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) drive->sleep = timeout + jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) drive->dev_flags |= IDE_DFLAG_SLEEPING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) EXPORT_SYMBOL(ide_stall_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) static inline int ide_lock_port(ide_hwif_t *hwif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (hwif->busy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) hwif->busy = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) static inline void ide_unlock_port(ide_hwif_t *hwif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) hwif->busy = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) static inline int ide_lock_host(struct ide_host *host, ide_hwif_t *hwif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (host->host_flags & IDE_HFLAG_SERIALIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) rc = test_and_set_bit_lock(IDE_HOST_BUSY, &host->host_busy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) if (rc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (host->get_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) host->get_lock(ide_intr, hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) static inline void ide_unlock_host(struct ide_host *host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (host->host_flags & IDE_HFLAG_SERIALIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (host->release_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) host->release_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) clear_bit_unlock(IDE_HOST_BUSY, &host->host_busy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) struct request_queue *q = drive->queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) /* Use 3ms as that was the old plug delay */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (rq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) blk_mq_requeue_request(rq, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) blk_mq_delay_kick_requeue_list(q, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) blk_mq_delay_run_hw_queue(q->queue_hw_ctx[0], 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) blk_status_t ide_issue_rq(ide_drive_t *drive, struct request *rq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) bool local_requeue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) ide_hwif_t *hwif = drive->hwif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct ide_host *host = hwif->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) ide_startstop_t startstop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (!blk_rq_is_passthrough(rq) && !(rq->rq_flags & RQF_DONTPREP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) rq->rq_flags |= RQF_DONTPREP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) ide_req(rq)->special = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) /* HLD do_request() callback might sleep, make sure it's okay */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) might_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (ide_lock_host(host, hwif))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return BLK_STS_DEV_RESOURCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) spin_lock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (!ide_lock_port(hwif)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ide_hwif_t *prev_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) WARN_ON_ONCE(hwif->rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) repeat:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) prev_port = hwif->host->cur_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (drive->dev_flags & IDE_DFLAG_SLEEPING &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) time_after(drive->sleep, jiffies)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) ide_unlock_port(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) goto plug_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if ((hwif->host->host_flags & IDE_HFLAG_SERIALIZE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) hwif != prev_port) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) ide_drive_t *cur_dev =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) prev_port ? prev_port->cur_dev : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * set nIEN for previous port, drives in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * quirk list may not like intr setups/cleanups
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (cur_dev &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) (cur_dev->dev_flags & IDE_DFLAG_NIEN_QUIRK) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) prev_port->tp_ops->write_devctl(prev_port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) ATA_NIEN |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) ATA_DEVCTL_OBS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) hwif->host->cur_port = hwif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) hwif->cur_dev = drive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) drive->dev_flags &= ~(IDE_DFLAG_SLEEPING | IDE_DFLAG_PARKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * Sanity: don't accept a request that isn't a PM request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * if we are currently power managed. This is very important as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) * blk_stop_queue() doesn't prevent the blk_fetch_request()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) * above to return us whatever is in the queue. Since we call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) * ide_do_request() ourselves, we end up taking requests while
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * the queue is blocked...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if ((drive->dev_flags & IDE_DFLAG_BLOCKED) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) ata_pm_request(rq) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) (rq->rq_flags & RQF_PM) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) /* there should be no pending command at this point */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) ide_unlock_port(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) goto plug_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) scsi_req(rq)->resid_len = blk_rq_bytes(rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) hwif->rq = rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) spin_unlock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) startstop = start_request(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) spin_lock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (startstop == ide_stopped) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) rq = hwif->rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) hwif->rq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (rq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) goto repeat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) ide_unlock_port(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) plug_device:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (local_requeue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) list_add(&rq->queuelist, &drive->rq_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) spin_unlock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) ide_unlock_host(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) if (!local_requeue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) ide_requeue_and_plug(drive, rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) return BLK_STS_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) spin_unlock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (rq == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) ide_unlock_host(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) return BLK_STS_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * Issue a new request to a device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) blk_status_t ide_queue_rq(struct blk_mq_hw_ctx *hctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) const struct blk_mq_queue_data *bd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) ide_drive_t *drive = hctx->queue->queuedata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) ide_hwif_t *hwif = drive->hwif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) spin_lock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) if (drive->sense_rq_active) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) spin_unlock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) return BLK_STS_DEV_RESOURCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) spin_unlock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) blk_mq_start_request(bd->rq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return ide_issue_rq(drive, bd->rq, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) static int drive_is_ready(ide_drive_t *drive)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) ide_hwif_t *hwif = drive->hwif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) u8 stat = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) if (drive->waiting_for_dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) return hwif->dma_ops->dma_test_irq(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (hwif->io_ports.ctl_addr &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) stat = hwif->tp_ops->read_altstatus(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /* Note: this may clear a pending IRQ!! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) stat = hwif->tp_ops->read_status(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (stat & ATA_BUSY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) /* drive busy: definitely not interrupting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) /* drive ready: *might* be interrupting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) * ide_timer_expiry - handle lack of an IDE interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) * @data: timer callback magic (hwif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) * An IDE command has timed out before the expected drive return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) * occurred. At this point we attempt to clean up the current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) * mess. If the current handler includes an expiry handler then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * we invoke the expiry handler, and providing it is happy the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * work is done. If that fails we apply generic recovery rules
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * invoking the handler and checking the drive DMA status. We
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * have an excessively incestuous relationship with the DMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) * logic that wants cleaning up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) void ide_timer_expiry (struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) ide_hwif_t *hwif = from_timer(hwif, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) ide_drive_t *drive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) ide_handler_t *handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) int wait = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) int plug_device = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) struct request *rq_in_flight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) spin_lock_irqsave(&hwif->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) handler = hwif->handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if (handler == NULL || hwif->req_gen != hwif->req_gen_timer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) * Either a marginal timeout occurred
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) * (got the interrupt just as timer expired),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) * or we were "sleeping" to give other devices a chance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) * Either way, we don't really want to complain about anything.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) ide_expiry_t *expiry = hwif->expiry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) ide_startstop_t startstop = ide_stopped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) drive = hwif->cur_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if (expiry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) wait = expiry(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) if (wait > 0) { /* continue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /* reset timer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) hwif->timer.expires = jiffies + wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) hwif->req_gen_timer = hwif->req_gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) add_timer(&hwif->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) spin_unlock_irqrestore(&hwif->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) hwif->handler = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) hwif->expiry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) * We need to simulate a real interrupt when invoking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) * the handler() function, which means we need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) * globally mask the specific IRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) spin_unlock(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) /* disable_irq_nosync ?? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) disable_irq(hwif->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) if (hwif->polling) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) startstop = handler(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) } else if (drive_is_ready(drive)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (drive->waiting_for_dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) hwif->dma_ops->dma_lost_irq(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (hwif->port_ops && hwif->port_ops->clear_irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) hwif->port_ops->clear_irq(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) printk(KERN_WARNING "%s: lost interrupt\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) drive->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) startstop = handler(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (drive->waiting_for_dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) startstop = ide_dma_timeout_retry(drive, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) startstop = ide_error(drive, "irq timeout",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) hwif->tp_ops->read_status(hwif));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) /* Disable interrupts again, `handler' might have enabled it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) spin_lock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) enable_irq(hwif->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) if (startstop == ide_stopped && hwif->polling == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) rq_in_flight = hwif->rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) hwif->rq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) ide_unlock_port(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) plug_device = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) spin_unlock_irqrestore(&hwif->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) if (plug_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) ide_unlock_host(hwif->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) ide_requeue_and_plug(drive, rq_in_flight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * unexpected_intr - handle an unexpected IDE interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * @irq: interrupt line
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * @hwif: port being processed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) * There's nothing really useful we can do with an unexpected interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) * other than reading the status register (to clear it), and logging it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) * There should be no way that an irq can happen before we're ready for it,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) * so we needn't worry much about losing an "important" interrupt here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) * On laptops (and "green" PCs), an unexpected interrupt occurs whenever
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) * the drive enters "idle", "standby", or "sleep" mode, so if the status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * looks "good", we just ignore the interrupt completely.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) * This routine assumes __cli() is in effect when called.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) * If an unexpected interrupt happens on irq15 while we are handling irq14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) * and if the two interfaces are "serialized" (CMD640), then it looks like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) * we could screw up by interfering with a new request being set up for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) * irq15.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * In reality, this is a non-issue. The new command is not sent unless
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) * the drive is ready to accept one, in which case we know the drive is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) * not trying to interrupt us. And ide_set_handler() is always invoked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) * before completing the issuance of any new drive command, so we will not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) * be accidentally invoked as a result of any valid command completion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * interrupt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) static void unexpected_intr(int irq, ide_hwif_t *hwif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) u8 stat = hwif->tp_ops->read_status(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) /* Try to not flood the console with msgs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) static unsigned long last_msgtime, count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) ++count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) if (time_after(jiffies, last_msgtime + HZ)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) last_msgtime = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) printk(KERN_ERR "%s: unexpected interrupt, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) "status=0x%02x, count=%ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) hwif->name, stat, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) * ide_intr - default IDE interrupt handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) * @irq: interrupt number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) * @dev_id: hwif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) * @regs: unused weirdness from the kernel irq layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) * This is the default IRQ handler for the IDE layer. You should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) * not need to override it. If you do be aware it is subtle in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) * places
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * hwif is the interface in the group currently performing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) * a command. hwif->cur_dev is the drive and hwif->handler is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) * the IRQ handler to call. As we issue a command the handlers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) * step through multiple states, reassigning the handler to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) * next step in the process. Unlike a smart SCSI controller IDE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) * expects the main processor to sequence the various transfer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) * stages. We also manage a poll timer to catch up with most
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) * timeout situations. There are still a few where the handlers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) * don't ever decide to give up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) * The handler eventually returns ide_stopped to indicate the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) * request completed. At this point we issue the next request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) * on the port and the process begins again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) irqreturn_t ide_intr (int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) ide_hwif_t *hwif = (ide_hwif_t *)dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) struct ide_host *host = hwif->host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) ide_drive_t *drive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) ide_handler_t *handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) ide_startstop_t startstop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) irqreturn_t irq_ret = IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) int plug_device = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) struct request *rq_in_flight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) if (host->host_flags & IDE_HFLAG_SERIALIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (hwif != host->cur_port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) goto out_early;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) spin_lock_irqsave(&hwif->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) if (hwif->port_ops && hwif->port_ops->test_irq &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) hwif->port_ops->test_irq(hwif) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) handler = hwif->handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) if (handler == NULL || hwif->polling) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) * Not expecting an interrupt from this drive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) * That means this could be:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) * (1) an interrupt from another PCI device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) * sharing the same PCI INT# as us.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) * or (2) a drive just entered sleep or standby mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) * and is interrupting to let us know.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) * or (3) a spurious interrupt of unknown origin.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) * For PCI, we cannot tell the difference,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) * so in that case we just ignore it and hope it goes away.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) if ((host->irq_flags & IRQF_SHARED) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) * Probably not a shared PCI interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) * so we can safely try to do something about it:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) unexpected_intr(irq, hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) * Whack the status register, just in case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) * we have a leftover pending IRQ.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) (void)hwif->tp_ops->read_status(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) drive = hwif->cur_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) if (!drive_is_ready(drive))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) * This happens regularly when we share a PCI IRQ with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) * another device. Unfortunately, it can also happen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) * with some buggy drives that trigger the IRQ before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) * their status register is up to date. Hopefully we have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) * enough advance overhead that the latter isn't a problem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) hwif->handler = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) hwif->expiry = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) hwif->req_gen++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) del_timer(&hwif->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) spin_unlock(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) if (hwif->port_ops && hwif->port_ops->clear_irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) hwif->port_ops->clear_irq(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) if (drive->dev_flags & IDE_DFLAG_UNMASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) local_irq_enable_in_hardirq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) /* service this interrupt, may set handler for next interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) startstop = handler(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) spin_lock_irq(&hwif->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) * Note that handler() may have set things up for another
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) * interrupt to occur soon, but it cannot happen until
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) * we exit from this routine, because it will be the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) * same irq as is currently being serviced here, and Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) * won't allow another of the same (on any CPU) until we return.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (startstop == ide_stopped && hwif->polling == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) BUG_ON(hwif->handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) rq_in_flight = hwif->rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) hwif->rq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) ide_unlock_port(hwif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) plug_device = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) irq_ret = IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) spin_unlock_irqrestore(&hwif->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) out_early:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) if (plug_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) ide_unlock_host(hwif->host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) ide_requeue_and_plug(drive, rq_in_flight);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) return irq_ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) EXPORT_SYMBOL_GPL(ide_intr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) void ide_pad_transfer(ide_drive_t *drive, int write, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) ide_hwif_t *hwif = drive->hwif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) u8 buf[4] = { 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) while (len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) if (write)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) hwif->tp_ops->output_data(drive, NULL, buf, min(4, len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) hwif->tp_ops->input_data(drive, NULL, buf, min(4, len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) len -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) EXPORT_SYMBOL_GPL(ide_pad_transfer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) void ide_insert_request_head(ide_drive_t *drive, struct request *rq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) drive->sense_rq_active = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) list_add_tail(&rq->queuelist, &drive->rq_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) kblockd_schedule_work(&drive->rq_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) EXPORT_SYMBOL_GPL(ide_insert_request_head);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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