diff options
Diffstat (limited to 'drivers/ata/libata-scsi.c')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 2773 |
1 files changed, 1276 insertions, 1497 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 3d4887d0e84a..721d3f270c8e 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1,38 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * libata-scsi.c - helper library for ATA * - * Maintained by: Tejun Heo <tj@kernel.org> - * Please ALWAYS copy linux-ide@vger.kernel.org - * on emails. - * * Copyright 2003-2004 Red Hat, Inc. All rights reserved. * Copyright 2003-2004 Jeff Garzik * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - * - * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/driver-api/libata.rst * * Hardware documentation available from * - http://www.t10.org/ * - http://www.t13.org/ - * */ +#include <linux/compat.h> #include <linux/slab.h> #include <linux/kernel.h> #include <linux/blkdev.h> @@ -49,13 +30,14 @@ #include <linux/hdreg.h> #include <linux/uaccess.h> #include <linux/suspend.h> -#include <asm/unaligned.h> +#include <linux/unaligned.h> #include <linux/ioprio.h> +#include <linux/of.h> #include "libata.h" #include "libata-transport.h" -#define ATA_SCSI_RBUF_SIZE 4096 +#define ATA_SCSI_RBUF_SIZE 2048 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock); static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE]; @@ -64,18 +46,20 @@ typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc); static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev); -static struct ata_device *ata_scsi_find_dev(struct ata_port *ap, - const struct scsi_device *scsidev); - -#define RW_RECOVERY_MPAGE 0x1 -#define RW_RECOVERY_MPAGE_LEN 12 -#define CACHE_MPAGE 0x8 -#define CACHE_MPAGE_LEN 20 -#define CONTROL_MPAGE 0xa -#define CONTROL_MPAGE_LEN 12 -#define ALL_MPAGES 0x3f -#define ALL_SUB_MPAGES 0xff +#define RW_RECOVERY_MPAGE 0x1 +#define RW_RECOVERY_MPAGE_LEN 12 +#define CACHE_MPAGE 0x8 +#define CACHE_MPAGE_LEN 20 +#define CONTROL_MPAGE 0xa +#define CONTROL_MPAGE_LEN 12 +#define ALL_MPAGES 0x3f +#define ALL_SUB_MPAGES 0xff +#define CDL_T2A_SUB_MPAGE 0x07 +#define CDL_T2B_SUB_MPAGE 0x08 +#define CDL_T2_SUB_MPAGE_LEN 232 +#define ATA_FEATURE_SUB_MPAGE 0xf2 +#define ATA_FEATURE_SUB_MPAGE_LEN 16 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = { RW_RECOVERY_MPAGE, @@ -105,71 +89,6 @@ static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { 0, 30 /* extended self test time, see 05-359r1 */ }; -static const char *ata_lpm_policy_names[] = { - [ATA_LPM_UNKNOWN] = "max_performance", - [ATA_LPM_MAX_POWER] = "max_performance", - [ATA_LPM_MED_POWER] = "medium_power", - [ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm", - [ATA_LPM_MIN_POWER_WITH_PARTIAL] = "min_power_with_partial", - [ATA_LPM_MIN_POWER] = "min_power", -}; - -static ssize_t ata_scsi_lpm_store(struct device *device, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct Scsi_Host *shost = class_to_shost(device); - struct ata_port *ap = ata_shost_to_port(shost); - struct ata_link *link; - struct ata_device *dev; - enum ata_lpm_policy policy; - unsigned long flags; - - /* UNKNOWN is internal state, iterate from MAX_POWER */ - for (policy = ATA_LPM_MAX_POWER; - policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) { - const char *name = ata_lpm_policy_names[policy]; - - if (strncmp(name, buf, strlen(name)) == 0) - break; - } - if (policy == ARRAY_SIZE(ata_lpm_policy_names)) - return -EINVAL; - - spin_lock_irqsave(ap->lock, flags); - - ata_for_each_link(link, ap, EDGE) { - ata_for_each_dev(dev, &ap->link, ENABLED) { - if (dev->horkage & ATA_HORKAGE_NOLPM) { - count = -EOPNOTSUPP; - goto out_unlock; - } - } - } - - ap->target_lpm_policy = policy; - ata_port_schedule_eh(ap); -out_unlock: - spin_unlock_irqrestore(ap->lock, flags); - return count; -} - -static ssize_t ata_scsi_lpm_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct Scsi_Host *shost = class_to_shost(dev); - struct ata_port *ap = ata_shost_to_port(shost); - - if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names)) - return -EINVAL; - - return snprintf(buf, PAGE_SIZE, "%s\n", - ata_lpm_policy_names[ap->target_lpm_policy]); -} -DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR, - ata_scsi_lpm_show, ata_scsi_lpm_store); -EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); - static ssize_t ata_scsi_park_show(struct device *device, struct device_attribute *attr, char *buf) { @@ -178,7 +97,7 @@ static ssize_t ata_scsi_park_show(struct device *device, struct ata_link *link; struct ata_device *dev; unsigned long now; - unsigned int uninitialized_var(msecs); + unsigned int msecs; int rc = 0; ap = ata_shost_to_port(sdev->host); @@ -206,7 +125,7 @@ static ssize_t ata_scsi_park_show(struct device *device, unlock: spin_unlock_irq(ap->lock); - return rc ? rc : snprintf(buf, 20, "%u\n", msecs); + return rc ? rc : sysfs_emit(buf, "%u\n", msecs); } static ssize_t ata_scsi_park_store(struct device *device, @@ -216,11 +135,11 @@ static ssize_t ata_scsi_park_store(struct device *device, struct scsi_device *sdev = to_scsi_device(device); struct ata_port *ap; struct ata_device *dev; - long int input; + int input; unsigned long flags; int rc; - rc = kstrtol(buf, 10, &input); + rc = kstrtoint(buf, 10, &input); if (rc) return rc; if (input < -2) @@ -273,113 +192,129 @@ DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR, ata_scsi_park_show, ata_scsi_park_store); EXPORT_SYMBOL_GPL(dev_attr_unload_heads); -static ssize_t ata_ncq_prio_enable_show(struct device *device, - struct device_attribute *attr, - char *buf) -{ - struct scsi_device *sdev = to_scsi_device(device); - struct ata_port *ap; - struct ata_device *dev; - bool ncq_prio_enable; - int rc = 0; - - ap = ata_shost_to_port(sdev->host); - - spin_lock_irq(ap->lock); - dev = ata_scsi_find_dev(ap, sdev); - if (!dev) { - rc = -ENODEV; - goto unlock; - } - - ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE; - -unlock: - spin_unlock_irq(ap->lock); - - return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable); -} - -static ssize_t ata_ncq_prio_enable_store(struct device *device, - struct device_attribute *attr, - const char *buf, size_t len) +bool ata_scsi_sense_is_valid(u8 sk, u8 asc, u8 ascq) { - struct scsi_device *sdev = to_scsi_device(device); - struct ata_port *ap; - struct ata_device *dev; - long int input; - int rc; - - rc = kstrtol(buf, 10, &input); - if (rc) - return rc; - if ((input < 0) || (input > 1)) - return -EINVAL; - - ap = ata_shost_to_port(sdev->host); - dev = ata_scsi_find_dev(ap, sdev); - if (unlikely(!dev)) - return -ENODEV; - - spin_lock_irq(ap->lock); - if (input) - dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE; - else - dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; - - dev->link->eh_info.action |= ATA_EH_REVALIDATE; - dev->link->eh_info.flags |= ATA_EHI_QUIET; - ata_port_schedule_eh(ap); - spin_unlock_irq(ap->lock); - - ata_port_wait_eh(ap); + /* + * If sk == NO_SENSE, and asc + ascq == NO ADDITIONAL SENSE INFORMATION, + * then there is no sense data to add. + */ + if (sk == 0 && asc == 0 && ascq == 0) + return false; - if (input) { - spin_lock_irq(ap->lock); - if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) { - dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; - rc = -EIO; - } - spin_unlock_irq(ap->lock); - } + /* If sk > COMPLETED, sense data is bogus. */ + if (sk > COMPLETED) + return false; - return rc ? rc : len; + return true; } -DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR, - ata_ncq_prio_enable_show, ata_ncq_prio_enable_store); -EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable); - void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) { bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); - if (!cmd) - return; - - cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; - - scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq); + scsi_build_sense(cmd, d_sense, sk, asc, ascq); } -void ata_scsi_set_sense_information(struct ata_device *dev, - struct scsi_cmnd *cmd, - const struct ata_taskfile *tf) +static void ata_scsi_set_sense_information(struct ata_queued_cmd *qc) { u64 information; - if (!cmd) + if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { + ata_dev_dbg(qc->dev, + "missing result TF: can't set INFORMATION sense field\n"); return; + } - information = ata_tf_read_block(tf, dev); + information = ata_tf_read_block(&qc->result_tf, qc->dev); if (information == U64_MAX) return; - scsi_set_sense_information(cmd->sense_buffer, + scsi_set_sense_information(qc->scsicmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, information); } +/** + * ata_scsi_set_passthru_sense_fields - Set ATA fields in sense buffer + * @qc: ATA PASS-THROUGH command. + * + * Populates "ATA Status Return sense data descriptor" / "Fixed format + * sense data" with ATA taskfile fields. + * + * LOCKING: + * None. + */ +static void ata_scsi_set_passthru_sense_fields(struct ata_queued_cmd *qc) +{ + struct ata_device *dev = qc->dev; + struct scsi_cmnd *cmd = qc->scsicmd; + struct ata_taskfile *tf = &qc->result_tf; + unsigned char *sb = cmd->sense_buffer; + + if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { + ata_dev_dbg(dev, + "missing result TF: can't set ATA PT sense fields\n"); + return; + } + + if ((sb[0] & 0x7f) >= 0x72) { + unsigned char *desc; + u8 len; + + /* descriptor format */ + len = sb[7]; + desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); + if (!desc) { + if (SCSI_SENSE_BUFFERSIZE < len + 14) + return; + sb[7] = len + 14; + desc = sb + 8 + len; + } + desc[0] = 9; + desc[1] = 12; + /* + * Copy registers into sense buffer. + */ + desc[2] = 0x00; + desc[3] = tf->error; + desc[5] = tf->nsect; + desc[7] = tf->lbal; + desc[9] = tf->lbam; + desc[11] = tf->lbah; + desc[12] = tf->device; + desc[13] = tf->status; + + /* + * Fill in Extend bit, and the high order bytes + * if applicable. + */ + if (tf->flags & ATA_TFLAG_LBA48) { + desc[2] |= 0x01; + desc[4] = tf->hob_nsect; + desc[6] = tf->hob_lbal; + desc[8] = tf->hob_lbam; + desc[10] = tf->hob_lbah; + } + } else { + /* Fixed sense format */ + sb[0] |= 0x80; + sb[3] = tf->error; + sb[4] = tf->status; + sb[5] = tf->device; + sb[6] = tf->nsect; + if (tf->flags & ATA_TFLAG_LBA48) { + sb[8] |= 0x80; + if (tf->hob_nsect) + sb[8] |= 0x40; + if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) + sb[8] |= 0x20; + } + sb[9] = tf->lbal; + sb[10] = tf->lbam; + sb[11] = tf->lbah; + } +} + static void ata_scsi_set_invalid_field(struct ata_device *dev, struct scsi_cmnd *cmd, u16 field, u8 bit) { @@ -398,98 +333,25 @@ static void ata_scsi_set_invalid_parameter(struct ata_device *dev, field, 0xff, 0); } -static ssize_t -ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct Scsi_Host *shost = class_to_shost(dev); - struct ata_port *ap = ata_shost_to_port(shost); - if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM)) - return ap->ops->em_store(ap, buf, count); - return -EINVAL; -} - -static ssize_t -ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct Scsi_Host *shost = class_to_shost(dev); - struct ata_port *ap = ata_shost_to_port(shost); - - if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM)) - return ap->ops->em_show(ap, buf); - return -EINVAL; -} -DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR, - ata_scsi_em_message_show, ata_scsi_em_message_store); -EXPORT_SYMBOL_GPL(dev_attr_em_message); - -static ssize_t -ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct Scsi_Host *shost = class_to_shost(dev); - struct ata_port *ap = ata_shost_to_port(shost); - - return snprintf(buf, 23, "%d\n", ap->em_message_type); -} -DEVICE_ATTR(em_message_type, S_IRUGO, - ata_scsi_em_message_type_show, NULL); -EXPORT_SYMBOL_GPL(dev_attr_em_message_type); - -static ssize_t -ata_scsi_activity_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct scsi_device *sdev = to_scsi_device(dev); - struct ata_port *ap = ata_shost_to_port(sdev->host); - struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); - - if (atadev && ap->ops->sw_activity_show && - (ap->flags & ATA_FLAG_SW_ACTIVITY)) - return ap->ops->sw_activity_show(atadev, buf); - return -EINVAL; -} - -static ssize_t -ata_scsi_activity_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct scsi_device *sdev = to_scsi_device(dev); - struct ata_port *ap = ata_shost_to_port(sdev->host); - struct ata_device *atadev = ata_scsi_find_dev(ap, sdev); - enum sw_activity val; - int rc; +static struct attribute *ata_common_sdev_attrs[] = { + &dev_attr_unload_heads.attr, + NULL +}; - if (atadev && ap->ops->sw_activity_store && - (ap->flags & ATA_FLAG_SW_ACTIVITY)) { - val = simple_strtoul(buf, NULL, 0); - switch (val) { - case OFF: case BLINK_ON: case BLINK_OFF: - rc = ap->ops->sw_activity_store(atadev, val); - if (!rc) - return count; - else - return rc; - } - } - return -EINVAL; -} -DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show, - ata_scsi_activity_store); -EXPORT_SYMBOL_GPL(dev_attr_sw_activity); +static const struct attribute_group ata_common_sdev_attr_group = { + .attrs = ata_common_sdev_attrs +}; -struct device_attribute *ata_common_sdev_attrs[] = { - &dev_attr_unload_heads, - &dev_attr_ncq_prio_enable, +const struct attribute_group *ata_common_sdev_groups[] = { + &ata_common_sdev_attr_group, NULL }; -EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); +EXPORT_SYMBOL_GPL(ata_common_sdev_groups); /** * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. * @sdev: SCSI device for which BIOS geometry is to be determined - * @bdev: block device associated with @sdev + * @unused: gendisk associated with @sdev * @capacity: capacity of SCSI device * @geom: location to which geometry will be output * @@ -504,7 +366,7 @@ EXPORT_SYMBOL_GPL(ata_common_sdev_attrs); * RETURNS: * Zero. */ -int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, +int ata_std_bios_param(struct scsi_device *sdev, struct gendisk *unused, sector_t capacity, int geom[]) { geom[0] = 255; @@ -514,6 +376,7 @@ int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, return 0; } +EXPORT_SYMBOL_GPL(ata_std_bios_param); /** * ata_scsi_unlock_native_capacity - unlock native capacity @@ -543,6 +406,7 @@ void ata_scsi_unlock_native_capacity(struct scsi_device *sdev) spin_unlock_irqrestore(ap->lock, flags); ata_port_wait_eh(ap); } +EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); /** * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl @@ -602,8 +466,12 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) u8 scsi_cmd[MAX_COMMAND_SIZE]; u8 args[4], *argbuf = NULL; int argsize = 0; - enum dma_data_direction data_dir; struct scsi_sense_hdr sshdr; + const struct scsi_exec_args exec_args = { + .sshdr = &sshdr, + .sense = sensebuf, + .sense_len = sizeof(sensebuf), + }; int cmd_result; if (arg == NULL) @@ -626,11 +494,9 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) scsi_cmd[1] = (4 << 1); /* PIO Data-in */ scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, block count in sector count field */ - data_dir = DMA_FROM_DEVICE; } else { scsi_cmd[1] = (3 << 1); /* Non-data */ scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */ - data_dir = DMA_NONE; } scsi_cmd[0] = ATA_16; @@ -648,16 +514,18 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) /* Good values for timeout and retries? Values below from scsi_ioctl_send_command() for default case... */ - cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize, - sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); - - if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ + cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf, + argsize, 10 * HZ, 5, &exec_args); + if (cmd_result < 0) { + rc = cmd_result; + goto error; + } + if (scsi_sense_valid(&sshdr)) {/* sense data available */ u8 *desc = sensebuf + 8; - cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ /* If we set cc then ATA pass-through will cause a * check condition even if no error. Filter that. */ - if (cmd_result & SAM_STAT_CHECK_CONDITION) { + if (scsi_status_is_check_condition(cmd_result)) { if (sshdr.sense_key == RECOVERED_ERROR && sshdr.asc == 0 && sshdr.ascq == 0x1d) cmd_result &= ~SAM_STAT_CHECK_CONDITION; @@ -707,6 +575,11 @@ int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) u8 args[7]; struct scsi_sense_hdr sshdr; int cmd_result; + const struct scsi_exec_args exec_args = { + .sshdr = &sshdr, + .sense = sensebuf, + .sense_len = sizeof(sensebuf), + }; if (arg == NULL) return -EINVAL; @@ -729,12 +602,14 @@ int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) /* Good values for timeout and retries? Values below from scsi_ioctl_send_command() for default case... */ - cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0, - sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL); - - if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */ + cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL, + 0, 10 * HZ, 5, &exec_args); + if (cmd_result < 0) { + rc = cmd_result; + goto error; + } + if (scsi_sense_valid(&sshdr)) {/* sense data available */ u8 *desc = sensebuf + 8; - cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ /* If we set cc then ATA pass-through will cause a * check condition even if no error. Filter that. */ @@ -768,17 +643,21 @@ int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) return rc; } -static int ata_ioc32(struct ata_port *ap) +static bool ata_ioc32(struct ata_port *ap) { if (ap->flags & ATA_FLAG_PIO_DMA) - return 1; + return true; if (ap->pflags & ATA_PFLAG_PIO32) - return 1; - return 0; + return true; + return false; } +/* + * This handles both native and compat commands, so anything added + * here must have a compatible argument, or check in_compat_syscall() + */ int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, - int cmd, void __user *arg) + unsigned int cmd, void __user *arg) { unsigned long val; int rc = -EINVAL; @@ -789,6 +668,10 @@ int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, spin_lock_irqsave(ap->lock, flags); val = ata_ioc32(ap); spin_unlock_irqrestore(ap->lock, flags); +#ifdef CONFIG_COMPAT + if (in_compat_syscall()) + return put_user(val, (compat_ulong_t __user *)arg); +#endif return put_user(val, (unsigned long __user *)arg); case HDIO_SET_32BIT: @@ -829,7 +712,8 @@ int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev, } EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl); -int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) +int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd, + void __user *arg) { return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host), scsidev, cmd, arg); @@ -858,89 +742,65 @@ EXPORT_SYMBOL_GPL(ata_scsi_ioctl); static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, struct scsi_cmnd *cmd) { + struct ata_port *ap = dev->link->ap; struct ata_queued_cmd *qc; + int tag; - qc = ata_qc_new_init(dev, cmd->request->tag); - if (qc) { - qc->scsicmd = cmd; - qc->scsidone = cmd->scsi_done; + if (unlikely(ata_port_is_frozen(ap))) + goto fail; - qc->sg = scsi_sglist(cmd); - qc->n_elem = scsi_sg_count(cmd); - - if (cmd->request->rq_flags & RQF_QUIET) - qc->flags |= ATA_QCFLAG_QUIET; + if (ap->flags & ATA_FLAG_SAS_HOST) { + /* + * SAS hosts may queue > ATA_MAX_QUEUE commands so use + * unique per-device budget token as a tag. + */ + if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE)) + goto fail; + tag = cmd->budget_token; } else { - cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); - cmd->scsi_done(cmd); + tag = scsi_cmd_to_rq(cmd)->tag; } + qc = __ata_qc_from_tag(ap, tag); + qc->tag = qc->hw_tag = tag; + qc->ap = ap; + qc->dev = dev; + + ata_qc_reinit(qc); + + qc->scsicmd = cmd; + qc->scsidone = scsi_done; + + qc->sg = scsi_sglist(cmd); + qc->n_elem = scsi_sg_count(cmd); + + if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET) + qc->flags |= ATA_QCFLAG_QUIET; + return qc; + +fail: + set_host_byte(cmd, DID_OK); + set_status_byte(cmd, SAM_STAT_TASK_SET_FULL); + scsi_done(cmd); + return NULL; } static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; - qc->extrabytes = scmd->request->extra_len; + qc->extrabytes = scmd->extra_len; qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes; } /** - * ata_dump_status - user friendly display of error info - * @id: id of the port in question - * @tf: ptr to filled out taskfile - * - * Decode and dump the ATA error/status registers for the user so - * that they have some idea what really happened at the non - * make-believe layer. - * - * LOCKING: - * inherited from caller - */ -static void ata_dump_status(unsigned id, struct ata_taskfile *tf) -{ - u8 stat = tf->command, err = tf->feature; - - pr_warn("ata%u: status=0x%02x { ", id, stat); - if (stat & ATA_BUSY) { - pr_cont("Busy }\n"); /* Data is not valid in this case */ - } else { - if (stat & ATA_DRDY) pr_cont("DriveReady "); - if (stat & ATA_DF) pr_cont("DeviceFault "); - if (stat & ATA_DSC) pr_cont("SeekComplete "); - if (stat & ATA_DRQ) pr_cont("DataRequest "); - if (stat & ATA_CORR) pr_cont("CorrectedError "); - if (stat & ATA_SENSE) pr_cont("Sense "); - if (stat & ATA_ERR) pr_cont("Error "); - pr_cont("}\n"); - - if (err) { - pr_warn("ata%u: error=0x%02x { ", id, err); - if (err & ATA_ABORTED) pr_cont("DriveStatusError "); - if (err & ATA_ICRC) { - if (err & ATA_ABORTED) - pr_cont("BadCRC "); - else pr_cont("Sector "); - } - if (err & ATA_UNC) pr_cont("UncorrectableError "); - if (err & ATA_IDNF) pr_cont("SectorIdNotFound "); - if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound "); - if (err & ATA_AMNF) pr_cont("AddrMarkNotFound "); - pr_cont("}\n"); - } - } -} - -/** * ata_to_sense_error - convert ATA error to SCSI error - * @id: ATA device number * @drv_stat: value contained in ATA status register * @drv_err: value contained in ATA error register * @sk: the sense key we'll fill out * @asc: the additional sense code we'll fill out * @ascq: the additional sense code qualifier we'll fill out - * @verbose: be verbose * * Converts an ATA error into a SCSI error. Fill out pointers to * SK, ASC, and ASCQ bytes for later use in fixed or descriptor @@ -949,8 +809,8 @@ static void ata_dump_status(unsigned id, struct ata_taskfile *tf) * LOCKING: * spin_lock_irqsave(host lock) */ -static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, - u8 *asc, u8 *ascq, int verbose) +static void ata_to_sense_error(u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, + u8 *ascq) { int i; @@ -999,18 +859,14 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, {0xFF, 0xFF, 0xFF, 0xFF}, // END mark }; static const unsigned char stat_table[][4] = { - /* Must be first because BUSY means no other bits valid */ - {0x80, ABORTED_COMMAND, 0x47, 0x00}, - // Busy, fake parity for now - {0x40, ILLEGAL_REQUEST, 0x21, 0x04}, - // Device ready, unaligned write command - {0x20, HARDWARE_ERROR, 0x44, 0x00}, - // Device fault, internal target failure - {0x08, ABORTED_COMMAND, 0x47, 0x00}, - // Timed out in xfer, fake parity for now - {0x04, RECOVERED_ERROR, 0x11, 0x00}, - // Recovered ECC error Medium error, recovered - {0xFF, 0xFF, 0xFF, 0xFF}, // END mark + /* Busy: must be first because BUSY means no other bits valid */ + { ATA_BUSY, ABORTED_COMMAND, 0x00, 0x00 }, + /* Device fault: INTERNAL TARGET FAILURE */ + { ATA_DF, HARDWARE_ERROR, 0x44, 0x00 }, + /* Corrected data error */ + { ATA_CORR, RECOVERED_ERROR, 0x00, 0x00 }, + + { 0xFF, 0xFF, 0xFF, 0xFF }, /* END mark */ }; /* @@ -1029,7 +885,7 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, *sk = sense_table[i][1]; *asc = sense_table[i][2]; *ascq = sense_table[i][3]; - goto translate_done; + return; } } } @@ -1044,7 +900,7 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, *sk = stat_table[i][1]; *asc = stat_table[i][2]; *ascq = stat_table[i][3]; - goto translate_done; + return; } } @@ -1055,22 +911,14 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, *sk = ABORTED_COMMAND; *asc = 0x00; *ascq = 0x00; - - translate_done: - if (verbose) - pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", - id, drv_stat, drv_err, *sk, *asc, *ascq); - return; } /* * ata_gen_passthru_sense - Generate check condition sense block. * @qc: Command that completed. * - * This function is specific to the ATA descriptor format sense - * block specified for the ATA pass through commands. Regardless - * of whether the command errored or not, return a sense - * block. Copy all controller registers into the sense + * This function is specific to the ATA pass through commands. + * Regardless of whether the command errored or not, return a sense * block. If there was no error, we get the request from an ATA * passthrough command, so we use the following sense data: * sk = RECOVERED ERROR @@ -1082,89 +930,42 @@ static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, */ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) { + struct ata_device *dev = qc->dev; struct scsi_cmnd *cmd = qc->scsicmd; struct ata_taskfile *tf = &qc->result_tf; - unsigned char *sb = cmd->sense_buffer; - unsigned char *desc = sb + 8; - int verbose = qc->ap->ops->error_handler == NULL; u8 sense_key, asc, ascq; - memset(sb, 0, SCSI_SENSE_BUFFERSIZE); - - cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; + if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { + ata_dev_dbg(dev, + "missing result TF: can't generate ATA PT sense data\n"); + if (qc->err_mask) + ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); + return; + } /* * Use ata_to_sense_error() to map status register bits * onto sense key, asc & ascq. */ if (qc->err_mask || - tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { - ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, - &sense_key, &asc, &ascq, verbose); + tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { + ata_to_sense_error(tf->status, tf->error, + &sense_key, &asc, &ascq); ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq); } else { /* * ATA PASS-THROUGH INFORMATION AVAILABLE - * Always in descriptor format sense. - */ - scsi_build_sense_buffer(1, cmd->sense_buffer, - RECOVERED_ERROR, 0, 0x1D); - } - - if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) { - u8 len; - - /* descriptor format */ - len = sb[7]; - desc = (char *)scsi_sense_desc_find(sb, len + 8, 9); - if (!desc) { - if (SCSI_SENSE_BUFFERSIZE < len + 14) - return; - sb[7] = len + 14; - desc = sb + 8 + len; - } - desc[0] = 9; - desc[1] = 12; - /* - * Copy registers into sense buffer. - */ - desc[2] = 0x00; - desc[3] = tf->feature; /* == error reg */ - desc[5] = tf->nsect; - desc[7] = tf->lbal; - desc[9] = tf->lbam; - desc[11] = tf->lbah; - desc[12] = tf->device; - desc[13] = tf->command; /* == status reg */ - - /* - * Fill in Extend bit, and the high order bytes - * if applicable. + * + * Note: we are supposed to call ata_scsi_set_sense(), which + * respects the D_SENSE bit, instead of unconditionally + * generating the sense data in descriptor format. However, + * because hdparm, hddtemp, and udisks incorrectly assume sense + * data in descriptor format, without even looking at the + * RESPONSE CODE field in the returned sense data (to see which + * format the returned sense data is in), we are stuck with + * being bug compatible with older kernels. */ - if (tf->flags & ATA_TFLAG_LBA48) { - desc[2] |= 0x01; - desc[4] = tf->hob_nsect; - desc[6] = tf->hob_lbal; - desc[8] = tf->hob_lbam; - desc[10] = tf->hob_lbah; - } - } else { - /* Fixed sense format */ - desc[0] = tf->feature; - desc[1] = tf->command; /* status */ - desc[2] = tf->device; - desc[3] = tf->nsect; - desc[7] = 0; - if (tf->flags & ATA_TFLAG_LBA48) { - desc[8] |= 0x80; - if (tf->hob_nsect) - desc[8] |= 0x40; - if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah) - desc[8] |= 0x20; - } - desc[9] = tf->lbal; - desc[10] = tf->lbam; - desc[11] = tf->lbah; + scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D); } } @@ -1172,8 +973,7 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc) * ata_gen_ata_sense - generate a SCSI fixed sense block * @qc: Command that we are erroring out * - * Generate sense block for a failed ATA command @qc. Descriptor - * format is used to accommodate LBA48 block address. + * Generate sense block for a failed ATA command @qc. * * LOCKING: * None. @@ -1183,45 +983,48 @@ static void ata_gen_ata_sense(struct ata_queued_cmd *qc) struct ata_device *dev = qc->dev; struct scsi_cmnd *cmd = qc->scsicmd; struct ata_taskfile *tf = &qc->result_tf; - unsigned char *sb = cmd->sense_buffer; - int verbose = qc->ap->ops->error_handler == NULL; - u64 block; u8 sense_key, asc, ascq; - memset(sb, 0, SCSI_SENSE_BUFFERSIZE); - - cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; - if (ata_dev_disabled(dev)) { /* Device disabled after error recovery */ /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */ ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21); return; } + + if (ata_id_is_locked(dev->id)) { + /* Security locked */ + /* LOGICAL UNIT ACCESS NOT AUTHORIZED */ + ata_scsi_set_sense(dev, cmd, DATA_PROTECT, 0x74, 0x71); + return; + } + + if (!(qc->flags & ATA_QCFLAG_RTF_FILLED)) { + ata_dev_dbg(dev, + "Missing result TF: reporting aborted command\n"); + goto aborted; + } + /* Use ata_to_sense_error() to map status register bits * onto sense key, asc & ascq. */ if (qc->err_mask || - tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { - ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature, - &sense_key, &asc, &ascq, verbose); + tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { + ata_to_sense_error(tf->status, tf->error, + &sense_key, &asc, &ascq); ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq); - } else { - /* Could not decode error */ - ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n", - tf->command, qc->err_mask); - ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); return; } - block = ata_tf_read_block(&qc->result_tf, dev); - if (block == U64_MAX) - return; - - scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block); + /* Could not decode error */ + ata_dev_warn(dev, + "Could not decode error 0x%x, status 0x%x (err_mask=0x%x)\n", + tf->error, tf->status, qc->err_mask); +aborted: + ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); } -static void ata_scsi_sdev_config(struct scsi_device *sdev) +void ata_scsi_sdev_config(struct scsi_device *sdev) { sdev->use_10_for_rw = 1; sdev->use_10_for_ms = 1; @@ -1236,7 +1039,7 @@ static void ata_scsi_sdev_config(struct scsi_device *sdev) } /** - * atapi_drain_needed - Check whether data transfer may overflow + * ata_scsi_dma_need_drain - Check whether data transfer may overflow * @rq: request to be checked * * ATAPI commands which transfer variable length data to host @@ -1250,47 +1053,57 @@ static void ata_scsi_sdev_config(struct scsi_device *sdev) * RETURNS: * 1 if ; otherwise, 0. */ -static int atapi_drain_needed(struct request *rq) +bool ata_scsi_dma_need_drain(struct request *rq) { - if (likely(!blk_rq_is_passthrough(rq))) - return 0; - - if (!blk_rq_bytes(rq) || op_is_write(req_op(rq))) - return 0; + struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); - return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC; + return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC; } +EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain); -static int ata_scsi_dev_config(struct scsi_device *sdev, - struct ata_device *dev) +int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim, + struct ata_device *dev) { - struct request_queue *q = sdev->request_queue; + int depth = 1; if (!ata_id_has_unload(dev->id)) dev->flags |= ATA_DFLAG_NO_UNLOAD; /* configure max sectors */ - blk_queue_max_hw_sectors(q, dev->max_sectors); + dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors); + lim->max_hw_sectors = dev->max_sectors; if (dev->class == ATA_DEV_ATAPI) { - void *buf; - sdev->sector_size = ATA_SECT_SIZE; /* set DMA padding */ - blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1); + lim->dma_pad_mask = ATA_DMA_PAD_SZ - 1; - /* configure draining */ - buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL); - if (!buf) { + /* make room for appending the drain */ + lim->max_segments--; + + sdev->dma_drain_len = ATAPI_MAX_DRAIN; + sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO); + if (!sdev->dma_drain_buf) { ata_dev_err(dev, "drain buffer allocation failed\n"); return -ENOMEM; } - - blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN); } else { sdev->sector_size = ata_id_logical_sector_size(dev->id); - sdev->manage_start_stop = 1; + + /* + * Ask the sd driver to issue START STOP UNIT on runtime suspend + * and resume and shutdown only. For system level suspend/resume, + * devices power state is handled directly by libata EH. + * Given that disks are always spun up on system resume, also + * make sure that the sd driver forces runtime suspended disks + * to be resumed to correctly reflect the power state of the + * device. + */ + sdev->manage_runtime_start_stop = 1; + sdev->manage_shutdown = 1; + sdev->manage_restart = ata_acpi_dev_manage_restart(dev); + sdev->force_runtime_start_on_system_start = 1; } /* @@ -1305,20 +1118,15 @@ static int ata_scsi_dev_config(struct scsi_device *sdev, "sector_size=%u > PAGE_SIZE, PIO may malfunction\n", sdev->sector_size); - blk_queue_update_dma_alignment(q, sdev->sector_size - 1); + lim->dma_alignment = sdev->sector_size - 1; if (dev->flags & ATA_DFLAG_AN) set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events); - if (dev->flags & ATA_DFLAG_NCQ) { - int depth; - + if (ata_ncq_supported(dev)) depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); - depth = min(ATA_MAX_QUEUE, depth); - scsi_change_queue_depth(sdev, depth); - } - - blk_queue_flush_queueable(q, false); + depth = min(ATA_MAX_QUEUE, depth); + scsi_change_queue_depth(sdev, depth); if (dev->flags & ATA_DFLAG_TRUSTED) sdev->security_supported = 1; @@ -1328,8 +1136,45 @@ static int ata_scsi_dev_config(struct scsi_device *sdev, } /** - * ata_scsi_slave_config - Set SCSI device attributes + * ata_scsi_sdev_init - Early setup of SCSI device + * @sdev: SCSI device to examine + * + * This is called from scsi_alloc_sdev() when the scsi device + * associated with an ATA device is scanned on a port. + * + * LOCKING: + * Defined by SCSI layer. We don't really care. + */ + +int ata_scsi_sdev_init(struct scsi_device *sdev) +{ + struct ata_port *ap = ata_shost_to_port(sdev->host); + struct device_link *link; + + ata_scsi_sdev_config(sdev); + + /* + * Create a link from the ata_port device to the scsi device to ensure + * that PM does suspend/resume in the correct order: the scsi device is + * consumer (child) and the ata port the supplier (parent). + */ + link = device_link_add(&sdev->sdev_gendev, &ap->tdev, + DL_FLAG_STATELESS | + DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); + if (!link) { + ata_port_err(ap, "Failed to create link to scsi device %s\n", + dev_name(&sdev->sdev_gendev)); + return -ENODEV; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ata_scsi_sdev_init); + +/** + * ata_scsi_sdev_configure - Set SCSI device attributes * @sdev: SCSI device to examine + * @lim: queue limits * * This is called before we actually start reading * and writing to the device, to configure certain @@ -1339,22 +1184,20 @@ static int ata_scsi_dev_config(struct scsi_device *sdev, * Defined by SCSI layer. We don't really care. */ -int ata_scsi_slave_config(struct scsi_device *sdev) +int ata_scsi_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim) { struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); - int rc = 0; - - ata_scsi_sdev_config(sdev); if (dev) - rc = ata_scsi_dev_config(sdev, dev); + return ata_scsi_dev_config(sdev, lim, dev); - return rc; + return 0; } +EXPORT_SYMBOL_GPL(ata_scsi_sdev_configure); /** - * ata_scsi_slave_destroy - SCSI device is about to be destroyed + * ata_scsi_sdev_destroy - SCSI device is about to be destroyed * @sdev: SCSI device to be destroyed * * @sdev is about to be destroyed for hot/warm unplugging. If @@ -1367,15 +1210,13 @@ int ata_scsi_slave_config(struct scsi_device *sdev) * LOCKING: * Defined by SCSI layer. We don't really care. */ -void ata_scsi_slave_destroy(struct scsi_device *sdev) +void ata_scsi_sdev_destroy(struct scsi_device *sdev) { struct ata_port *ap = ata_shost_to_port(sdev->host); - struct request_queue *q = sdev->request_queue; unsigned long flags; struct ata_device *dev; - if (!ap->ops->error_handler) - return; + device_link_remove(&sdev->sdev_gendev, &ap->tdev); spin_lock_irqsave(ap->lock, flags); dev = __ata_scsi_find_dev(ap, sdev); @@ -1387,75 +1228,9 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev) } spin_unlock_irqrestore(ap->lock, flags); - kfree(q->dma_drain_buffer); - q->dma_drain_buffer = NULL; - q->dma_drain_size = 0; -} - -/** - * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth - * @ap: ATA port to which the device change the queue depth - * @sdev: SCSI device to configure queue depth for - * @queue_depth: new queue depth - * - * libsas and libata have different approaches for associating a sdev to - * its ata_port. - * - */ -int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, - int queue_depth) -{ - struct ata_device *dev; - unsigned long flags; - - if (queue_depth < 1 || queue_depth == sdev->queue_depth) - return sdev->queue_depth; - - dev = ata_scsi_find_dev(ap, sdev); - if (!dev || !ata_dev_enabled(dev)) - return sdev->queue_depth; - - /* NCQ enabled? */ - spin_lock_irqsave(ap->lock, flags); - dev->flags &= ~ATA_DFLAG_NCQ_OFF; - if (queue_depth == 1 || !ata_ncq_enabled(dev)) { - dev->flags |= ATA_DFLAG_NCQ_OFF; - queue_depth = 1; - } - spin_unlock_irqrestore(ap->lock, flags); - - /* limit and apply queue depth */ - queue_depth = min(queue_depth, sdev->host->can_queue); - queue_depth = min(queue_depth, ata_id_queue_depth(dev->id)); - queue_depth = min(queue_depth, ATA_MAX_QUEUE); - - if (sdev->queue_depth == queue_depth) - return -EINVAL; - - return scsi_change_queue_depth(sdev, queue_depth); -} - -/** - * ata_scsi_change_queue_depth - SCSI callback for queue depth config - * @sdev: SCSI device to configure queue depth for - * @queue_depth: new queue depth - * - * This is libata standard hostt->change_queue_depth callback. - * SCSI will call into this callback when user tries to set queue - * depth via sysfs. - * - * LOCKING: - * SCSI layer (we don't care) - * - * RETURNS: - * Newly configured queue depth. - */ -int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) -{ - struct ata_port *ap = ata_shost_to_port(sdev->host); - - return __ata_change_queue_depth(ap, sdev, queue_depth); + kfree(sdev->dma_drain_buf); } +EXPORT_SYMBOL_GPL(ata_scsi_sdev_destroy); /** * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command @@ -1475,7 +1250,6 @@ int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; - struct ata_taskfile *tf = &qc->tf; const u8 *cdb = scmd->cmnd; u16 fp; u8 bp = 0xff; @@ -1485,54 +1259,24 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) goto invalid_fld; } - tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; - tf->protocol = ATA_PROT_NODATA; - if (cdb[1] & 0x1) { - ; /* ignore IMMED bit, violates sat-r05 */ - } + /* LOEJ bit set not supported */ if (cdb[4] & 0x2) { fp = 4; bp = 1; - goto invalid_fld; /* LOEJ bit set not supported */ + goto invalid_fld; } + + /* Power conditions not supported */ if (((cdb[4] >> 4) & 0xf) != 0) { fp = 4; bp = 3; - goto invalid_fld; /* power conditions not supported */ + goto invalid_fld; } - if (cdb[4] & 0x1) { - tf->nsect = 1; /* 1 sector, lba=0 */ - - if (qc->dev->flags & ATA_DFLAG_LBA) { - tf->flags |= ATA_TFLAG_LBA; - - tf->lbah = 0x0; - tf->lbam = 0x0; - tf->lbal = 0x0; - tf->device |= ATA_LBA; - } else { - /* CHS */ - tf->lbal = 0x1; /* sect */ - tf->lbam = 0x0; /* cyl low */ - tf->lbah = 0x0; /* cyl high */ - } - - tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ - } else { - /* Some odd clown BIOSen issue spindown on power off (ACPI S4 - * or S5) causing some drives to spin up and down again. - */ - if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && - system_state == SYSTEM_POWER_OFF) - goto skip; - - if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && - system_entering_hibernation()) - goto skip; - - /* Issue ATA STANDBY IMMEDIATE command */ - tf->command = ATA_CMD_STANDBYNOW1; + /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ + if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { + ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); + return 1; } /* @@ -1547,12 +1291,8 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) invalid_fld: ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); return 1; - skip: - scmd->result = SAM_STAT_GOOD; - return 1; } - /** * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command * @qc: Storage for translated ATA taskfile @@ -1596,19 +1336,8 @@ static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc) */ static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) { - u64 lba = 0; - u32 len; - - VPRINTK("six-byte command\n"); - - lba |= ((u64)(cdb[1] & 0x1f)) << 16; - lba |= ((u64)cdb[2]) << 8; - lba |= ((u64)cdb[3]); - - len = cdb[4]; - - *plba = lba; - *plen = len; + *plba = get_unaligned_be24(&cdb[1]) & 0x1fffff; + *plen = cdb[4]; } /** @@ -1621,23 +1350,10 @@ static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen) * @plba: the LBA * @plen: the transfer length */ -static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) +static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) { - u64 lba = 0; - u32 len = 0; - - VPRINTK("ten-byte command\n"); - - lba |= ((u64)cdb[2]) << 24; - lba |= ((u64)cdb[3]) << 16; - lba |= ((u64)cdb[4]) << 8; - lba |= ((u64)cdb[5]); - - len |= ((u32)cdb[7]) << 8; - len |= ((u32)cdb[8]); - - *plba = lba; - *plen = len; + *plba = get_unaligned_be32(&cdb[2]); + *plen = get_unaligned_be16(&cdb[7]); } /** @@ -1650,29 +1366,22 @@ static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen) * @plba: the LBA * @plen: the transfer length */ -static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) +static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen) { - u64 lba = 0; - u32 len = 0; - - VPRINTK("sixteen-byte command\n"); - - lba |= ((u64)cdb[2]) << 56; - lba |= ((u64)cdb[3]) << 48; - lba |= ((u64)cdb[4]) << 40; - lba |= ((u64)cdb[5]) << 32; - lba |= ((u64)cdb[6]) << 24; - lba |= ((u64)cdb[7]) << 16; - lba |= ((u64)cdb[8]) << 8; - lba |= ((u64)cdb[9]); - - len |= ((u32)cdb[10]) << 24; - len |= ((u32)cdb[11]) << 16; - len |= ((u32)cdb[12]) << 8; - len |= ((u32)cdb[13]); - - *plba = lba; - *plen = len; + *plba = get_unaligned_be64(&cdb[2]); + *plen = get_unaligned_be32(&cdb[10]); +} + +/** + * scsi_dld - Get duration limit descriptor index + * @cdb: SCSI command to translate + * + * Returns the dld bits indicating the index of a command duration limit + * descriptor. + */ +static inline int scsi_dld(const u8 *cdb) +{ + return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03); } /** @@ -1701,19 +1410,22 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf->protocol = ATA_PROT_NODATA; - if (cdb[0] == VERIFY) { + switch (cdb[0]) { + case VERIFY: if (scmd->cmd_len < 10) { fp = 9; goto invalid_fld; } scsi_10_lba_len(cdb, &block, &n_block); - } else if (cdb[0] == VERIFY_16) { + break; + case VERIFY_16: if (scmd->cmd_len < 16) { fp = 15; goto invalid_fld; } scsi_16_lba_len(cdb, &block, &n_block); - } else { + break; + default: fp = 0; goto invalid_fld; } @@ -1769,9 +1481,6 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc) head = track % dev->heads; sect = (u32)block % dev->sectors + 1; - DPRINTK("block %u track %u cyl %u head %u sect %u\n", - (u32)block, track, cyl, head, sect); - /* Check whether the converted CHS can fit. Cylinder: 0-65535 Head: 0-15 @@ -1803,6 +1512,21 @@ nothing_to_do: return 1; } +static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks) +{ + struct request *rq = scsi_cmd_to_rq(scmd); + u32 req_blocks; + + if (!blk_rq_is_passthrough(rq)) + return true; + + req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size; + if (n_blocks > req_blocks) + return false; + + return true; +} + /** * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one * @qc: Storage for translated ATA taskfile @@ -1825,16 +1549,22 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; const u8 *cdb = scmd->cmnd; - struct request *rq = scmd->request; + struct request *rq = scsi_cmd_to_rq(scmd); int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); unsigned int tf_flags = 0; + int dld = 0; u64 block; u32 n_block; int rc; u16 fp = 0; - if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16) + switch (cdb[0]) { + case WRITE_6: + case WRITE_10: + case WRITE_16: tf_flags |= ATA_TFLAG_WRITE; + break; + } /* Calculate the SCSI LBA, transfer length and FUA. */ switch (cdb[0]) { @@ -1847,6 +1577,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) scsi_10_lba_len(cdb, &block, &n_block); if (cdb[1] & (1 << 3)) tf_flags |= ATA_TFLAG_FUA; + if (!ata_check_nblocks(scmd, n_block)) + goto invalid_fld; break; case READ_6: case WRITE_6: @@ -1861,6 +1593,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) */ if (!n_block) n_block = 256; + if (!ata_check_nblocks(scmd, n_block)) + goto invalid_fld; break; case READ_16: case WRITE_16: @@ -1869,11 +1603,13 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) goto invalid_fld; } scsi_16_lba_len(cdb, &block, &n_block); + dld = scsi_dld(cdb); if (cdb[1] & (1 << 3)) tf_flags |= ATA_TFLAG_FUA; + if (!ata_check_nblocks(scmd, n_block)) + goto invalid_fld; break; default: - DPRINTK("no-byte command\n"); fp = 0; goto invalid_fld; } @@ -1892,9 +1628,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) qc->flags |= ATA_QCFLAG_IO; qc->nbytes = n_block * scmd->device->sector_size; - rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, - qc->hw_tag, class); - + rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class); if (likely(rc == 0)) return 0; @@ -1926,32 +1660,33 @@ static void ata_qc_done(struct ata_queued_cmd *qc) static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) { - struct ata_port *ap = qc->ap; struct scsi_cmnd *cmd = qc->scsicmd; u8 *cdb = cmd->cmnd; - int need_sense = (qc->err_mask != 0); + bool have_sense = qc->flags & ATA_QCFLAG_SENSE_VALID; + bool is_ata_passthru = cdb[0] == ATA_16 || cdb[0] == ATA_12; + bool is_ck_cond_request = cdb[2] & 0x20; + bool is_error = qc->err_mask != 0; /* For ATA pass thru (SAT) commands, generate a sense block if * user mandated it or if there's an error. Note that if we - * generate because the user forced us to [CK_COND =1], a check + * generate because the user forced us to [CK_COND=1], a check * condition is generated and the ATA register values are returned * whether the command completed successfully or not. If there - * was no error, we use the following sense data: + * was no error, and CK_COND=1, we use the following sense data: * sk = RECOVERED ERROR * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE */ - if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && - ((cdb[2] & 0x20) || need_sense)) - ata_gen_passthru_sense(qc); - else if (qc->flags & ATA_QCFLAG_SENSE_VALID) - cmd->result = SAM_STAT_CHECK_CONDITION; - else if (need_sense) - ata_gen_ata_sense(qc); - else - cmd->result = SAM_STAT_GOOD; - - if (need_sense && !ap->ops->error_handler) - ata_dump_status(ap->print_id, &qc->result_tf); + if (is_ata_passthru && (is_ck_cond_request || is_error || have_sense)) { + if (!have_sense) + ata_gen_passthru_sense(qc); + ata_scsi_set_passthru_sense_fields(qc); + if (is_ck_cond_request) + set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION); + } else if (is_error) { + if (!have_sense) + ata_gen_ata_sense(qc); + ata_scsi_set_sense_information(qc); + } ata_qc_done(qc); } @@ -1989,8 +1724,6 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, struct ata_queued_cmd *qc; int rc; - VPRINTK("ENTER\n"); - qc = ata_scsi_qc_new(dev, cmd); if (!qc) goto err_mem; @@ -2021,88 +1754,32 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, /* select device, send command to hardware */ ata_qc_issue(qc); - VPRINTK("EXIT\n"); return 0; early_finish: ata_qc_free(qc); - cmd->scsi_done(cmd); - DPRINTK("EXIT - early finish (good or error)\n"); + scsi_done(cmd); return 0; err_did: ata_qc_free(qc); cmd->result = (DID_ERROR << 16); - cmd->scsi_done(cmd); + scsi_done(cmd); err_mem: - DPRINTK("EXIT - internal\n"); return 0; defer: ata_qc_free(qc); - DPRINTK("EXIT - defer\n"); if (rc == ATA_DEFER_LINK) return SCSI_MLQUEUE_DEVICE_BUSY; else return SCSI_MLQUEUE_HOST_BUSY; } -struct ata_scsi_args { - struct ata_device *dev; - u16 *id; - struct scsi_cmnd *cmd; -}; - -/** - * ata_scsi_rbuf_get - Map response buffer. - * @cmd: SCSI command containing buffer to be mapped. - * @flags: unsigned long variable to store irq enable status - * @copy_in: copy in from user buffer - * - * Prepare buffer for simulated SCSI commands. - * - * LOCKING: - * spin_lock_irqsave(ata_scsi_rbuf_lock) on success - * - * RETURNS: - * Pointer to response buffer. - */ -static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in, - unsigned long *flags) -{ - spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags); - - memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); - if (copy_in) - sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), - ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); - return ata_scsi_rbuf; -} - -/** - * ata_scsi_rbuf_put - Unmap response buffer. - * @cmd: SCSI command containing buffer to be unmapped. - * @copy_out: copy out result - * @flags: @flags passed to ata_scsi_rbuf_get() - * - * Returns rbuf buffer. The result is copied to @cmd's buffer if - * @copy_back is true. - * - * LOCKING: - * Unlocks ata_scsi_rbuf_lock. - */ -static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, - unsigned long *flags) -{ - if (copy_out) - sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), - ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); - spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags); -} - /** * ata_scsi_rbuf_fill - wrapper for SCSI command simulators - * @args: device IDENTIFY data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @actor: Callback hook for desired SCSI command simulator * * Takes care of the hard work of simulating a SCSI command... @@ -2115,25 +1792,32 @@ static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out, * LOCKING: * spin_lock_irqsave(host lock) */ -static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, - unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf)) +static void ata_scsi_rbuf_fill(struct ata_device *dev, struct scsi_cmnd *cmd, + unsigned int (*actor)(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf)) { - u8 *rbuf; - unsigned int rc; - struct scsi_cmnd *cmd = args->cmd; unsigned long flags; + unsigned int len; - rbuf = ata_scsi_rbuf_get(cmd, false, &flags); - rc = actor(args, rbuf); - ata_scsi_rbuf_put(cmd, rc == 0, &flags); + spin_lock_irqsave(&ata_scsi_rbuf_lock, flags); - if (rc == 0) + memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE); + len = actor(dev, cmd, ata_scsi_rbuf); + if (len) { + sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), + ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE); cmd->result = SAM_STAT_GOOD; + if (scsi_bufflen(cmd) > len) + scsi_set_resid(cmd, scsi_bufflen(cmd) - len); + } + + spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags); } /** - * ata_scsiop_inq_std - Simulate INQUIRY command - * @args: device IDENTIFY data / SCSI command of interest. + * ata_scsiop_inq_std - Simulate standard INQUIRY command + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Returns standard device identification data associated @@ -2142,7 +1826,8 @@ static void ata_scsi_rbuf_fill(struct ata_scsi_args *args, * LOCKING: * spin_lock_irqsave(host lock) */ -static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_inq_std(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { static const u8 versions[] = { 0x00, @@ -2179,43 +1864,49 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) 2 }; - VPRINTK("ENTER\n"); - - /* set scsi removable (RMB) bit per ata bit, or if the - * AHCI port says it's external (Hotplug-capable, eSATA). + /* + * Set the SCSI Removable Media Bit (RMB) if the ATA removable media + * device bit (obsolete since ATA-8 ACS) is set. */ - if (ata_id_removable(args->id) || - (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL)) + if (ata_id_removable(dev->id)) hdr[1] |= (1 << 7); - if (args->dev->class == ATA_DEV_ZAC) { + if (dev->class == ATA_DEV_ZAC) { hdr[0] = TYPE_ZBC; hdr[2] = 0x7; /* claim SPC-5 version compatibility */ } + if (dev->flags & ATA_DFLAG_CDL) + hdr[2] = 0xd; /* claim SPC-6 version compatibility */ + memcpy(rbuf, hdr, sizeof(hdr)); memcpy(&rbuf[8], "ATA ", 8); - ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); + ata_id_string(dev->id, &rbuf[16], ATA_ID_PROD, 16); /* From SAT, use last 2 words from fw rev unless they are spaces */ - ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); + ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV + 2, 4); if (strncmp(&rbuf[32], " ", 4) == 0) - ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4); + ata_id_string(dev->id, &rbuf[32], ATA_ID_FW_REV, 4); if (rbuf[32] == 0 || rbuf[32] == ' ') memcpy(&rbuf[32], "n/a ", 4); - if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC) + if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc)); else memcpy(rbuf + 58, versions, sizeof(versions)); - return 0; + /* + * Include all 8 possible version descriptors, even if not all of + * them are popoulated. + */ + return 96; } /** * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages - * @args: device IDENTIFY data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Returns list of inquiry VPD pages available. @@ -2223,9 +1914,10 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) * LOCKING: * spin_lock_irqsave(host lock) */ -static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_inq_00(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { - int num_pages; + int i, num_pages = 0; static const u8 pages[] = { 0x00, /* page 0x00, this page */ 0x80, /* page 0x80, unit serial no page */ @@ -2235,19 +1927,24 @@ static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 0xb1, /* page 0xb1, block device characteristics page */ 0xb2, /* page 0xb2, thin provisioning page */ 0xb6, /* page 0xb6, zoned block device characteristics */ + 0xb9, /* page 0xb9, concurrent positioning ranges */ }; - num_pages = sizeof(pages); - if (!(args->dev->flags & ATA_DFLAG_ZAC)) - num_pages--; + for (i = 0; i < sizeof(pages); i++) { + if (pages[i] == 0xb6 && !ata_dev_is_zac(dev)) + continue; + rbuf[num_pages + 4] = pages[i]; + num_pages++; + } rbuf[3] = num_pages; /* number of supported VPD pages */ - memcpy(rbuf + 4, pages, num_pages); - return 0; + + return get_unaligned_be16(&rbuf[2]) + 4; } /** * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number - * @args: device IDENTIFY data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Returns ATA device serial number. @@ -2255,7 +1952,8 @@ static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) * LOCKING: * spin_lock_irqsave(host lock) */ -static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_inq_80(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { static const u8 hdr[] = { 0, @@ -2265,14 +1963,16 @@ static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) }; memcpy(rbuf, hdr, sizeof(hdr)); - ata_id_string(args->id, (unsigned char *) &rbuf[4], + ata_id_string(dev->id, (unsigned char *) &rbuf[4], ATA_ID_SERNO, ATA_ID_SERNO_LEN); - return 0; + + return get_unaligned_be16(&rbuf[2]) + 4; } /** * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity - * @args: device IDENTIFY data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Yields two logical unit device identification designators: @@ -2283,7 +1983,8 @@ static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf) * LOCKING: * spin_lock_irqsave(host lock) */ -static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_inq_83(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { const int sat_model_serial_desc_len = 68; int num; @@ -2295,7 +1996,7 @@ static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) rbuf[num + 0] = 2; rbuf[num + 3] = ATA_ID_SERNO_LEN; num += 4; - ata_id_string(args->id, (unsigned char *) rbuf + num, + ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, ATA_ID_SERNO_LEN); num += ATA_ID_SERNO_LEN; @@ -2307,31 +2008,33 @@ static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) num += 4; memcpy(rbuf + num, "ATA ", 8); num += 8; - ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD, + ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_PROD, ATA_ID_PROD_LEN); num += ATA_ID_PROD_LEN; - ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, + ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_SERNO, ATA_ID_SERNO_LEN); num += ATA_ID_SERNO_LEN; - if (ata_id_has_wwn(args->id)) { + if (ata_id_has_wwn(dev->id)) { /* SAT defined lu world wide name */ /* piv=0, assoc=lu, code_set=binary, designator=NAA */ rbuf[num + 0] = 1; rbuf[num + 1] = 3; rbuf[num + 3] = ATA_ID_WWN_LEN; num += 4; - ata_id_string(args->id, (unsigned char *) rbuf + num, + ata_id_string(dev->id, (unsigned char *) rbuf + num, ATA_ID_WWN, ATA_ID_WWN_LEN); num += ATA_ID_WWN_LEN; } rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ - return 0; + + return get_unaligned_be16(&rbuf[2]) + 4; } /** * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info - * @args: device IDENTIFY data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Yields SAT-specified ATA VPD page. @@ -2339,12 +2042,9 @@ static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) * LOCKING: * spin_lock_irqsave(host lock) */ -static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_inq_89(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { - struct ata_taskfile tf; - - memset(&tf, 0, sizeof(tf)); - rbuf[1] = 0x89; /* our page code */ rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ rbuf[3] = (0x238 & 0xff); @@ -2353,22 +2053,35 @@ static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) memcpy(&rbuf[16], "libata ", 16); memcpy(&rbuf[32], DRV_VERSION, 4); - /* we don't store the ATA device signature, so we fake it */ - - tf.command = ATA_DRDY; /* really, this is Status reg */ - tf.lbal = 0x1; - tf.nsect = 0x1; - - ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ + rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ + /* TODO: PMP? */ + + /* we don't store the ATA device signature, so we fake it */ + rbuf[38] = ATA_DRDY; /* really, this is Status reg */ + rbuf[40] = 0x1; + rbuf[48] = 0x1; rbuf[56] = ATA_CMD_ID_ATA; - memcpy(&rbuf[60], &args->id[0], 512); - return 0; + memcpy(&rbuf[60], &dev->id[0], 512); + + return get_unaligned_be16(&rbuf[2]) + 4; } -static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) +/** + * ata_scsiop_inq_b0 - Simulate INQUIRY VPD page B0, Block Limits + * @dev: Target device. + * @cmd: SCSI command of interest. + * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. + * + * Return data for the VPD page B0h (Block Limits). + * + * LOCKING: + * spin_lock_irqsave(host lock) + */ +static unsigned int ata_scsiop_inq_b0(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { u16 min_io_sectors; @@ -2382,7 +2095,7 @@ static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) * logical than physical sector size we need to figure out what the * latter is. */ - min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id); + min_io_sectors = 1 << ata_id_log2_per_physical_sector(dev->id); put_unaligned_be16(min_io_sectors, &rbuf[6]); /* @@ -2394,19 +2107,37 @@ static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf) * that we support some form of unmap - in thise case via WRITE SAME * with the unmap bit set. */ - if (ata_id_has_trim(args->id)) { - put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]); + if (ata_id_has_trim(dev->id)) { + u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM; + + if (dev->quirks & ATA_QUIRK_MAX_TRIM_128M) + max_blocks = 128 << (20 - SECTOR_SHIFT); + + put_unaligned_be64(max_blocks, &rbuf[36]); put_unaligned_be32(1, &rbuf[28]); } - return 0; + return get_unaligned_be16(&rbuf[2]) + 4; } -static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) +/** + * ata_scsiop_inq_b1 - Simulate INQUIRY VPD page B1, Block Device + * Characteristics + * @dev: Target device. + * @cmd: SCSI command of interest. + * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. + * + * Return data for the VPD page B1h (Block Device Characteristics). + * + * LOCKING: + * spin_lock_irqsave(host lock) + */ +static unsigned int ata_scsiop_inq_b1(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { - int form_factor = ata_id_form_factor(args->id); - int media_rotation_rate = ata_id_rotation_rate(args->id); - u8 zoned = ata_id_zoned_cap(args->id); + int form_factor = ata_id_form_factor(dev->id); + int media_rotation_rate = ata_id_rotation_rate(dev->id); + u8 zoned = ata_id_zoned_cap(dev->id); rbuf[1] = 0xb1; rbuf[3] = 0x3c; @@ -2416,21 +2147,52 @@ static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) if (zoned) rbuf[8] = (zoned << 4); - return 0; + return get_unaligned_be16(&rbuf[2]) + 4; } -static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) +/** + * ata_scsiop_inq_b2 - Simulate INQUIRY VPD page B2, Logical Block + * Provisioning + * @dev: Target device. + * @cmd: SCSI command of interest. + * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. + * + * Return data for the VPD page B2h (Logical Block Provisioning). + * + * LOCKING: + * spin_lock_irqsave(host lock) + */ +static unsigned int ata_scsiop_inq_b2(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ rbuf[1] = 0xb2; rbuf[3] = 0x4; rbuf[5] = 1 << 6; /* TPWS */ - return 0; + return get_unaligned_be16(&rbuf[2]) + 4; } -static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) +/** + * ata_scsiop_inq_b6 - Simulate INQUIRY VPD page B6, Zoned Block Device + * Characteristics + * @dev: Target device. + * @cmd: SCSI command of interest. + * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. + * + * Return data for the VPD page B2h (Zoned Block Device Characteristics). + * + * LOCKING: + * spin_lock_irqsave(host lock) + */ +static unsigned int ata_scsiop_inq_b6(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { + if (!ata_dev_is_zac(dev)) { + ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); + return 0; + } + /* * zbc-r05 SCSI Zoned Block device characteristics VPD page */ @@ -2440,13 +2202,102 @@ static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf) /* * URSWRZ bit is only meaningful for host-managed ZAC drives */ - if (args->dev->zac_zoned_cap & 1) + if (dev->zac_zoned_cap & 1) rbuf[4] |= 1; - put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]); - put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]); - put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]); + put_unaligned_be32(dev->zac_zones_optimal_open, &rbuf[8]); + put_unaligned_be32(dev->zac_zones_optimal_nonseq, &rbuf[12]); + put_unaligned_be32(dev->zac_zones_max_open, &rbuf[16]); - return 0; + return get_unaligned_be16(&rbuf[2]) + 4; +} + +/** + * ata_scsiop_inq_b9 - Simulate INQUIRY VPD page B9, Concurrent Positioning + * Ranges + * @dev: Target device. + * @cmd: SCSI command of interest. + * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. + * + * Return data for the VPD page B9h (Concurrent Positioning Ranges). + * + * LOCKING: + * spin_lock_irqsave(host lock) + */ +static unsigned int ata_scsiop_inq_b9(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) +{ + struct ata_cpr_log *cpr_log = dev->cpr_log; + u8 *desc = &rbuf[64]; + int i; + + if (!cpr_log) { + ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); + return 0; + } + + /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ + rbuf[1] = 0xb9; + put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); + + for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) { + desc[0] = cpr_log->cpr[i].num; + desc[1] = cpr_log->cpr[i].num_storage_elements; + put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]); + put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]); + } + + return get_unaligned_be16(&rbuf[2]) + 4; +} + +/** + * ata_scsiop_inquiry - Simulate INQUIRY command + * @dev: Target device. + * @cmd: SCSI command of interest. + * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. + * + * Returns data associated with an INQUIRY command output. + * + * LOCKING: + * spin_lock_irqsave(host lock) + */ +static unsigned int ata_scsiop_inquiry(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) +{ + const u8 *scsicmd = cmd->cmnd; + + /* is CmdDt set? */ + if (scsicmd[1] & 2) { + ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); + return 0; + } + + /* Is EVPD clear? */ + if ((scsicmd[1] & 1) == 0) + return ata_scsiop_inq_std(dev, cmd, rbuf); + + switch (scsicmd[2]) { + case 0x00: + return ata_scsiop_inq_00(dev, cmd, rbuf); + case 0x80: + return ata_scsiop_inq_80(dev, cmd, rbuf); + case 0x83: + return ata_scsiop_inq_83(dev, cmd, rbuf); + case 0x89: + return ata_scsiop_inq_89(dev, cmd, rbuf); + case 0xb0: + return ata_scsiop_inq_b0(dev, cmd, rbuf); + case 0xb1: + return ata_scsiop_inq_b1(dev, cmd, rbuf); + case 0xb2: + return ata_scsiop_inq_b2(dev, cmd, rbuf); + case 0xb6: + return ata_scsiop_inq_b6(dev, cmd, rbuf); + case 0xb9: + return ata_scsiop_inq_b9(dev, cmd, rbuf); + default: + ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); + return 0; + } } /** @@ -2497,10 +2348,128 @@ static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) return sizeof(def_cache_mpage); } +/* + * Simulate MODE SENSE control mode page, sub-page 0. + */ +static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf, + bool changeable) +{ + modecpy(buf, def_control_mpage, + sizeof(def_control_mpage), changeable); + if (changeable) { + /* ata_mselect_control() */ + buf[2] |= (1 << 2); + } else { + bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); + + /* descriptor format sense data */ + buf[2] |= (d_sense << 2); + } + + return sizeof(def_control_mpage); +} + +/* + * Translate an ATA duration limit in microseconds to a SCSI duration limit + * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes + * only, take care of overflows. + */ +static inline u16 ata_xlat_cdl_limit(u8 *buf) +{ + u32 limit = get_unaligned_le32(buf); + + return min_t(u32, limit / 10000, 65535); +} + +/* + * Simulate MODE SENSE control mode page, sub-pages 07h and 08h + * (command duration limits T2A and T2B mode pages). + */ +static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf, + u8 spg) +{ + u8 *b, *cdl, *desc; + u32 policy; + int i; + + if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl) + return 0; + + cdl = dev->cdl->desc_log_buf; + + /* + * Fill the subpage. The first four bytes of the T2A/T2B mode pages + * are a header. The PAGE LENGTH field is the size of the page + * excluding the header. + */ + buf[0] = CONTROL_MPAGE; + buf[1] = spg; + put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]); + if (spg == CDL_T2A_SUB_MPAGE) { + /* + * Read descriptors map to the T2A page: + * set perf_vs_duration_guidleine. + */ + buf[7] = (cdl[0] & 0x03) << 4; + desc = cdl + 64; + } else { + /* Write descriptors map to the T2B page */ + desc = cdl + 288; + } + + /* Fill the T2 page descriptors */ + b = &buf[8]; + policy = get_unaligned_le32(&cdl[0]); + for (i = 0; i < 7; i++, b += 32, desc += 32) { + /* t2cdlunits: fixed to 10ms */ + b[0] = 0x0a; + + /* Max inactive time and its policy */ + put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]); + b[6] = ((policy >> 8) & 0x0f) << 4; + + /* Max active time and its policy */ + put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]); + b[6] |= (policy >> 4) & 0x0f; + + /* Command duration guideline and its policy */ + put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]); + b[14] = policy & 0x0f; + } + + return CDL_T2_SUB_MPAGE_LEN; +} + +/* + * Simulate MODE SENSE control mode page, sub-page f2h + * (ATA feature control mode page). + */ +static unsigned int ata_msense_control_ata_feature(struct ata_device *dev, + u8 *buf) +{ + /* PS=0, SPF=1 */ + buf[0] = CONTROL_MPAGE | (1 << 6); + buf[1] = ATA_FEATURE_SUB_MPAGE; + + /* + * The first four bytes of ATA Feature Control mode page are a header. + * The PAGE LENGTH field is the size of the page excluding the header. + */ + put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]); + + if (dev->flags & ATA_DFLAG_CDL_ENABLED) + buf[4] = 0x02; /* T2A and T2B pages enabled */ + else + buf[4] = 0; + + return ATA_FEATURE_SUB_MPAGE_LEN; +} + /** * ata_msense_control - Simulate MODE SENSE control mode page * @dev: ATA device of interest * @buf: output buffer + * @spg: sub-page code * @changeable: whether changeable parameters are requested * * Generate a generic MODE SENSE control mode page. @@ -2509,17 +2478,27 @@ static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable) * None. */ static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, - bool changeable) + u8 spg, bool changeable) { - modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); - if (changeable) { - buf[2] |= (1 << 2); /* ata_mselect_control() */ - } else { - bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); - - buf[2] |= (d_sense << 2); /* descriptor format sense data */ + unsigned int n; + + switch (spg) { + case 0: + return ata_msense_control_spg0(dev, buf, changeable); + case CDL_T2A_SUB_MPAGE: + case CDL_T2B_SUB_MPAGE: + return ata_msense_control_spgt2(dev, buf, spg); + case ATA_FEATURE_SUB_MPAGE: + return ata_msense_control_ata_feature(dev, buf); + case ALL_SUB_MPAGES: + n = ata_msense_control_spg0(dev, buf, changeable); + n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE); + n += ata_msense_control_spgt2(dev, buf + n, CDL_T2B_SUB_MPAGE); + n += ata_msense_control_ata_feature(dev, buf + n); + return n; + default: + return 0; } - return sizeof(def_control_mpage); } /** @@ -2539,33 +2518,10 @@ static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable) return sizeof(def_rw_recovery_mpage); } -/* - * We can turn this into a real blacklist if it's needed, for now just - * blacklist any Maxtor BANC1G10 revision firmware - */ -static int ata_dev_supports_fua(u16 *id) -{ - unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1]; - - if (!libata_fua) - return 0; - if (!ata_id_has_fua(id)) - return 0; - - ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); - ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw)); - - if (strcmp(model, "Maxtor")) - return 1; - if (strcmp(fw, "BANC1G10")) - return 1; - - return 0; /* blacklisted */ -} - /** * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands - * @args: device IDENTIFY data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Simulate MODE SENSE commands. Assume this is invoked for direct @@ -2575,10 +2531,10 @@ static int ata_dev_supports_fua(u16 *id) * LOCKING: * spin_lock_irqsave(host lock) */ -static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_mode_sense(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { - struct ata_device *dev = args->dev; - u8 *scsicmd = args->cmd->cmnd, *p = rbuf; + u8 *scsicmd = cmd->cmnd, *p = rbuf; static const u8 sat_blk_desc[] = { 0, 0, 0, 0, /* number of blocks: sat unspecified */ 0, @@ -2586,11 +2542,9 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) }; u8 pg, spg; unsigned int ebd, page_control, six_byte; - u8 dpofua, bp = 0xff; + u8 dpofua = 0, bp = 0xff; u16 fp; - VPRINTK("ENTER\n"); - six_byte = (scsicmd[0] == MODE_SENSE); ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ /* @@ -2618,13 +2572,25 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) pg = scsicmd[2] & 0x3f; spg = scsicmd[3]; + /* - * No mode subpages supported (yet) but asking for _all_ - * subpages may be valid + * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of + * the control page. */ - if (spg && (spg != ALL_SUB_MPAGES)) { - fp = 3; - goto invalid_fld; + if (spg) { + switch (spg) { + case ALL_SUB_MPAGES: + break; + case CDL_T2A_SUB_MPAGE: + case CDL_T2B_SUB_MPAGE: + case ATA_FEATURE_SUB_MPAGE: + if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE) + break; + fallthrough; + default: + fp = 3; + goto invalid_fld; + } } switch(pg) { @@ -2633,17 +2599,17 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) break; case CACHE_MPAGE: - p += ata_msense_caching(args->id, p, page_control == 1); + p += ata_msense_caching(dev->id, p, page_control == 1); break; case CONTROL_MPAGE: - p += ata_msense_control(args->dev, p, page_control == 1); + p += ata_msense_control(dev, p, spg, page_control == 1); break; case ALL_MPAGES: p += ata_msense_rw_recovery(p, page_control == 1); - p += ata_msense_caching(args->id, p, page_control == 1); - p += ata_msense_control(args->dev, p, page_control == 1); + p += ata_msense_caching(dev->id, p, page_control == 1); + p += ata_msense_control(dev, p, spg, page_control == 1); break; default: /* invalid page code */ @@ -2651,9 +2617,7 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) goto invalid_fld; } - dpofua = 0; - if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && - (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) + if (dev->flags & ATA_DFLAG_FUA) dpofua = 1 << 4; if (six_byte) { @@ -2663,32 +2627,33 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf) rbuf[3] = sizeof(sat_blk_desc); memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc)); } - } else { - unsigned int output_len = p - rbuf - 2; - rbuf[0] = output_len >> 8; - rbuf[1] = output_len; - rbuf[3] |= dpofua; - if (ebd) { - rbuf[7] = sizeof(sat_blk_desc); - memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); - } + return rbuf[0] + 1; + } + + put_unaligned_be16(p - rbuf - 2, &rbuf[0]); + rbuf[3] |= dpofua; + if (ebd) { + rbuf[7] = sizeof(sat_blk_desc); + memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc)); } - return 0; + + return get_unaligned_be16(&rbuf[0]) + 2; invalid_fld: - ata_scsi_set_invalid_field(dev, args->cmd, fp, bp); - return 1; + ata_scsi_set_invalid_field(dev, cmd, fp, bp); + return 0; saving_not_supp: - ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); + ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x39, 0x0); /* "Saving parameters not supported" */ - return 1; + return 0; } /** * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands - * @args: device IDENTIFY data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Simulate READ CAPACITY commands. @@ -2696,9 +2661,10 @@ saving_not_supp: * LOCKING: * None. */ -static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_read_cap(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { - struct ata_device *dev = args->dev; + u8 *scsicmd = cmd->cmnd; u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */ u32 sector_size; /* physical sector size in bytes */ u8 log2_per_phys; @@ -2708,9 +2674,7 @@ static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) log2_per_phys = ata_id_log2_per_physical_sector(dev->id); lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys); - VPRINTK("ENTER\n"); - - if (args->cmd->cmnd[0] == READ_CAPACITY) { + if (scsicmd[0] == READ_CAPACITY) { if (last_lba >= 0xffffffffULL) last_lba = 0xffffffff; @@ -2725,48 +2689,59 @@ static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) rbuf[5] = sector_size >> (8 * 2); rbuf[6] = sector_size >> (8 * 1); rbuf[7] = sector_size; - } else { - /* sector count, 64-bit */ - rbuf[0] = last_lba >> (8 * 7); - rbuf[1] = last_lba >> (8 * 6); - rbuf[2] = last_lba >> (8 * 5); - rbuf[3] = last_lba >> (8 * 4); - rbuf[4] = last_lba >> (8 * 3); - rbuf[5] = last_lba >> (8 * 2); - rbuf[6] = last_lba >> (8 * 1); - rbuf[7] = last_lba; - /* sector size */ - rbuf[ 8] = sector_size >> (8 * 3); - rbuf[ 9] = sector_size >> (8 * 2); - rbuf[10] = sector_size >> (8 * 1); - rbuf[11] = sector_size; - - rbuf[12] = 0; - rbuf[13] = log2_per_phys; - rbuf[14] = (lowest_aligned >> 8) & 0x3f; - rbuf[15] = lowest_aligned; - - if (ata_id_has_trim(args->id) && - !(dev->horkage & ATA_HORKAGE_NOTRIM)) { - rbuf[14] |= 0x80; /* LBPME */ - - if (ata_id_has_zero_after_trim(args->id) && - dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) { - ata_dev_info(dev, "Enabling discard_zeroes_data\n"); - rbuf[14] |= 0x40; /* LBPRZ */ - } + return 8; + } + + /* + * READ CAPACITY 16 command is defined as a service action + * (SERVICE_ACTION_IN_16 command). + */ + if (scsicmd[0] != SERVICE_ACTION_IN_16 || + (scsicmd[1] & 0x1f) != SAI_READ_CAPACITY_16) { + ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); + return 0; + } + + /* sector count, 64-bit */ + rbuf[0] = last_lba >> (8 * 7); + rbuf[1] = last_lba >> (8 * 6); + rbuf[2] = last_lba >> (8 * 5); + rbuf[3] = last_lba >> (8 * 4); + rbuf[4] = last_lba >> (8 * 3); + rbuf[5] = last_lba >> (8 * 2); + rbuf[6] = last_lba >> (8 * 1); + rbuf[7] = last_lba; + + /* sector size */ + rbuf[ 8] = sector_size >> (8 * 3); + rbuf[ 9] = sector_size >> (8 * 2); + rbuf[10] = sector_size >> (8 * 1); + rbuf[11] = sector_size; + + if (ata_id_zoned_cap(dev->id) || dev->class == ATA_DEV_ZAC) + rbuf[12] = (1 << 4); /* RC_BASIS */ + rbuf[13] = log2_per_phys; + rbuf[14] = (lowest_aligned >> 8) & 0x3f; + rbuf[15] = lowest_aligned; + + if (ata_id_has_trim(dev->id) && !(dev->quirks & ATA_QUIRK_NOTRIM)) { + rbuf[14] |= 0x80; /* LBPME */ + + if (ata_id_has_zero_after_trim(dev->id) && + dev->quirks & ATA_QUIRK_ZERO_AFTER_TRIM) { + ata_dev_info(dev, "Enabling discard_zeroes_data\n"); + rbuf[14] |= 0x40; /* LBPRZ */ } - if (ata_id_zoned_cap(args->id) || - args->dev->class == ATA_DEV_ZAC) - rbuf[12] = (1 << 4); /* RC_BASIS */ } - return 0; + + return 16; } /** * ata_scsiop_report_luns - Simulate REPORT LUNS command - * @args: device IDENTIFY data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Simulate REPORT LUNS command. @@ -2774,81 +2749,12 @@ static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf) * LOCKING: * spin_lock_irqsave(host lock) */ -static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_report_luns(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { - VPRINTK("ENTER\n"); rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ - return 0; -} - -static void atapi_sense_complete(struct ata_queued_cmd *qc) -{ - if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { - /* FIXME: not quite right; we don't want the - * translation of taskfile registers into - * a sense descriptors, since that's only - * correct for ATA, not ATAPI - */ - ata_gen_passthru_sense(qc); - } - - ata_qc_done(qc); -} - -/* is it pointless to prefer PIO for "safety reasons"? */ -static inline int ata_pio_use_silly(struct ata_port *ap) -{ - return (ap->flags & ATA_FLAG_PIO_DMA); -} - -static void atapi_request_sense(struct ata_queued_cmd *qc) -{ - struct ata_port *ap = qc->ap; - struct scsi_cmnd *cmd = qc->scsicmd; - - DPRINTK("ATAPI request sense\n"); - - memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); - -#ifdef CONFIG_ATA_SFF - if (ap->ops->sff_tf_read) - ap->ops->sff_tf_read(ap, &qc->tf); -#endif - - /* fill these in, for the case where they are -not- overwritten */ - cmd->sense_buffer[0] = 0x70; - cmd->sense_buffer[2] = qc->tf.feature >> 4; - - ata_qc_reinit(qc); - - /* setup sg table and init transfer direction */ - sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE); - ata_sg_init(qc, &qc->sgent, 1); - qc->dma_dir = DMA_FROM_DEVICE; - - memset(&qc->cdb, 0, qc->dev->cdb_len); - qc->cdb[0] = REQUEST_SENSE; - qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; - - qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; - qc->tf.command = ATA_CMD_PACKET; - - if (ata_pio_use_silly(ap)) { - qc->tf.protocol = ATAPI_PROT_DMA; - qc->tf.feature |= ATAPI_PKT_DMA; - } else { - qc->tf.protocol = ATAPI_PROT_PIO; - qc->tf.lbam = SCSI_SENSE_BUFFERSIZE; - qc->tf.lbah = 0; - } - qc->nbytes = SCSI_SENSE_BUFFERSIZE; - - qc->complete_fn = atapi_sense_complete; - - ata_qc_issue(qc); - - DPRINTK("EXIT\n"); + return 16; } /* @@ -2876,20 +2782,11 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc) struct scsi_cmnd *cmd = qc->scsicmd; unsigned int err_mask = qc->err_mask; - VPRINTK("ENTER, err_mask 0x%X\n", err_mask); + /* handle completion from EH */ + if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) { - /* handle completion from new EH */ - if (unlikely(qc->ap->ops->error_handler && - (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { - - if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { - /* FIXME: not quite right; we don't want the - * translation of taskfile registers into a - * sense descriptors, since that's only - * correct for ATA, not ATAPI - */ + if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) ata_gen_passthru_sense(qc); - } /* SCSI EH automatically locks door if sdev->locked is * set. Sometimes door lock request continues to @@ -2912,23 +2809,10 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc) return; } - /* successful completion or old EH failure path */ - if (unlikely(err_mask & AC_ERR_DEV)) { - cmd->result = SAM_STAT_CHECK_CONDITION; - atapi_request_sense(qc); - return; - } else if (unlikely(err_mask)) { - /* FIXME: not quite right; we don't want the - * translation of taskfile registers into - * a sense descriptors, since that's only - * correct for ATA, not ATAPI - */ - ata_gen_passthru_sense(qc); - } else { - if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) - atapi_fixup_inquiry(cmd); - cmd->result = SAM_STAT_GOOD; - } + /* successful completion path */ + if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0) + atapi_fixup_inquiry(cmd); + cmd->result = SAM_STAT_GOOD; ata_qc_done(qc); } @@ -2958,7 +2842,6 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; if (scmd->sc_data_direction == DMA_TO_DEVICE) { qc->tf.flags |= ATA_TFLAG_WRITE; - DPRINTK("direction: write\n"); } qc->tf.command = ATA_CMD_PACKET; @@ -2990,7 +2873,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) * This inconsistency confuses several controllers which * perform PIO using DMA such as Intel AHCIs and sil3124/32. * These controllers use actual number of transferred bytes to - * update DMA poitner and transfer of 4n+2 bytes make those + * update DMA pointer and transfer of 4n+2 bytes make those * controller push DMA pointer by 4n+4 bytes because SATA data * FISes are aligned to 4 bytes. This causes data corruption * and buffer overrun. @@ -3026,18 +2909,36 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) return 0; } -static struct ata_device *ata_find_dev(struct ata_port *ap, int devno) +static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno) { - if (!sata_pmp_attached(ap)) { - if (likely(devno >= 0 && - devno < ata_link_max_devices(&ap->link))) + /* + * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case), + * or 2 (IDE master + slave case). However, the former case includes + * libsas hosted devices which are numbered per scsi host, leading + * to devno potentially being larger than 0 but with each struct + * ata_device having its own struct ata_port and struct ata_link. + * To accommodate these, ignore devno and always use device number 0. + */ + if (likely(!sata_pmp_attached(ap))) { + int link_max_devices = ata_link_max_devices(&ap->link); + + if (link_max_devices == 1) + return &ap->link.device[0]; + + if (devno < link_max_devices) return &ap->link.device[devno]; - } else { - if (likely(devno >= 0 && - devno < ap->nr_pmp_links)) - return &ap->pmp_link[devno].device[0]; + + return NULL; } + /* + * For PMP-attached devices, the device number corresponds to C + * (channel) of SCSI [H:C:I:L], indicating the port pmp link + * for the device. + */ + if (devno < ap->nr_pmp_links) + return &ap->pmp_link[devno].device[0]; + return NULL; } @@ -3076,7 +2977,7 @@ static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap, * RETURNS: * Associated ATA device, or %NULL if not found. */ -static struct ata_device * +struct ata_device * ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) { struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); @@ -3154,8 +3055,19 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) goto invalid_fld; } - if (ata_is_ncq(tf->protocol) && (cdb[2 + cdb_offset] & 0x3) == 0) - tf->protocol = ATA_PROT_NCQ_NODATA; + if ((cdb[2 + cdb_offset] & 0x3) == 0) { + /* + * When T_LENGTH is zero (No data is transferred), dir should + * be DMA_NONE. + */ + if (scmd->sc_data_direction != DMA_NONE) { + fp = 2 + cdb_offset; + goto invalid_fld; + } + + if (ata_is_ncq(tf->protocol)) + tf->protocol = ATA_PROT_NCQ_NODATA; + } /* enable LBA */ tf->flags |= ATA_TFLAG_LBA; @@ -3164,7 +3076,8 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) * 12 and 16 byte CDBs use different offsets to * provide the various register values. */ - if (cdb[0] == ATA_16) { + switch (cdb[0]) { + case ATA_16: /* * 16-byte CDB - may contain extended commands. * @@ -3190,7 +3103,8 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) tf->lbah = cdb[12]; tf->device = cdb[13]; tf->command = cdb[14]; - } else if (cdb[0] == ATA_12) { + break; + case ATA_12: /* * 12-byte CDB - incapable of extended commands. */ @@ -3203,7 +3117,8 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) tf->lbah = cdb[7]; tf->device = cdb[8]; tf->command = cdb[9]; - } else { + break; + default: /* * 32-byte CDB - may contain extended command fields. * @@ -3227,6 +3142,7 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) tf->device = cdb[24]; tf->command = cdb[25]; tf->auxiliary = get_unaligned_be32(&cdb[28]); + break; } /* For NCQ commands copy the tag value */ @@ -3309,7 +3225,7 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) ata_qc_set_pc_nbytes(qc); /* We may not issue DMA commands if no DMA mode is set */ - if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) { + if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) { fp = 1; goto invalid_fld; } @@ -3459,7 +3375,7 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) u8 unmap = cdb[1] & 0x8; /* we may not issue DMA commands if no DMA mode is set */ - if (unlikely(!dev->dma_mode)) + if (unlikely(!ata_dma_enabled(dev))) goto invalid_opcode; /* @@ -3467,7 +3383,7 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) * as it modifies the DATA OUT buffer, which would corrupt user * memory for SG_IO commands. */ - if (unlikely(blk_rq_is_passthrough(scmd->request))) + if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))) goto invalid_opcode; if (unlikely(scmd->cmd_len < 16)) { @@ -3476,8 +3392,7 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) } scsi_16_lba_len(cdb, &block, &n_block); - if (!unmap || - (dev->horkage & ATA_HORKAGE_NOTRIM) || + if (!unmap || (dev->quirks & ATA_QUIRK_NOTRIM) || !ata_id_has_trim(dev->id)) { fp = 1; bp = 3; @@ -3547,7 +3462,8 @@ invalid_opcode: /** * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN - * @args: device MAINTENANCE_IN data / SCSI command of interest. + * @dev: Target device. + * @cmd: SCSI command of interest. * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. * * Yields a subset to satisfy scsi_report_opcode() @@ -3555,18 +3471,23 @@ invalid_opcode: * LOCKING: * spin_lock_irqsave(host lock) */ -static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) +static unsigned int ata_scsiop_maint_in(struct ata_device *dev, + struct scsi_cmnd *cmd, u8 *rbuf) { - struct ata_device *dev = args->dev; - u8 *cdb = args->cmd->cmnd; - u8 supported = 0; - unsigned int err = 0; + u8 *cdb = cmd->cmnd; + u8 supported = 0, cdlp = 0, rwcdlp = 0; - if (cdb[2] != 1) { + if ((cdb[1] & 0x1f) != MI_REPORT_SUPPORTED_OPERATION_CODES) { + ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); + return 0; + } + + if (cdb[2] != 1 && cdb[2] != 3) { ata_dev_warn(dev, "invalid command format %d\n", cdb[2]); - err = 2; - goto out; + ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); + return 0; } + switch (cdb[3]) { case INQUIRY: case MODE_SENSE: @@ -3576,6 +3497,7 @@ static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) case REPORT_LUNS: case REQUEST_SENSE: case SYNCHRONIZE_CACHE: + case SYNCHRONIZE_CACHE_16: case REZERO_UNIT: case SEEK_6: case SEEK_10: @@ -3584,10 +3506,8 @@ static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) case MAINTENANCE_IN: case READ_6: case READ_10: - case READ_16: case WRITE_6: case WRITE_10: - case WRITE_16: case ATA_12: case ATA_16: case VERIFY: @@ -3597,6 +3517,28 @@ static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) case START_STOP: supported = 3; break; + case READ_16: + supported = 3; + if (dev->flags & ATA_DFLAG_CDL) { + /* + * CDL read descriptors map to the T2A page, that is, + * rwcdlp = 0x01 and cdlp = 0x01 + */ + rwcdlp = 0x01; + cdlp = 0x01 << 3; + } + break; + case WRITE_16: + supported = 3; + if (dev->flags & ATA_DFLAG_CDL) { + /* + * CDL write descriptors map to the T2B page, that is, + * rwcdlp = 0x01 and cdlp = 0x02 + */ + rwcdlp = 0x01; + cdlp = 0x02 << 3; + } + break; case ZBC_IN: case ZBC_OUT: if (ata_id_zoned_cap(dev->id) || @@ -3611,9 +3553,12 @@ static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf) default: break; } -out: - rbuf[1] = supported; /* supported */ - return err; + + /* One command format */ + rbuf[0] = rwcdlp; + rbuf[1] = cdlp | supported; + + return 4; } /** @@ -3875,10 +3820,7 @@ static int ata_mselect_caching(struct ata_queued_cmd *qc, */ if (len != CACHE_MPAGE_LEN - 2) { - if (len < CACHE_MPAGE_LEN - 2) - *fp = len; - else - *fp = CACHE_MPAGE_LEN - 2; + *fp = min(len, CACHE_MPAGE_LEN - 2); return -EINVAL; } @@ -3905,20 +3847,11 @@ static int ata_mselect_caching(struct ata_queued_cmd *qc, return 0; } -/** - * ata_mselect_control - Simulate MODE SELECT for control page - * @qc: Storage for translated ATA taskfile - * @buf: input buffer - * @len: number of valid bytes in the input buffer - * @fp: out parameter for the failed field on error - * - * Prepare a taskfile to modify caching information for the device. - * - * LOCKING: - * None. +/* + * Simulate MODE SELECT control mode page, sub-page 0. */ -static int ata_mselect_control(struct ata_queued_cmd *qc, - const u8 *buf, int len, u16 *fp) +static int ata_mselect_control_spg0(struct ata_queued_cmd *qc, + const u8 *buf, int len, u16 *fp) { struct ata_device *dev = qc->dev; u8 mpage[CONTROL_MPAGE_LEN]; @@ -3931,10 +3864,7 @@ static int ata_mselect_control(struct ata_queued_cmd *qc, */ if (len != CONTROL_MPAGE_LEN - 2) { - if (len < CONTROL_MPAGE_LEN - 2) - *fp = len; - else - *fp = CONTROL_MPAGE_LEN - 2; + *fp = min(len, CONTROL_MPAGE_LEN - 2); return -EINVAL; } @@ -3943,7 +3873,7 @@ static int ata_mselect_control(struct ata_queued_cmd *qc, /* * Check that read-only bits are not modified. */ - ata_msense_control(dev, mpage, false); + ata_msense_control_spg0(dev, mpage, false); for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) { if (i == 0) continue; @@ -3959,6 +3889,88 @@ static int ata_mselect_control(struct ata_queued_cmd *qc, return 0; } +/* + * Translate MODE SELECT control mode page, sub-page f2h (ATA feature mode + * page) into a SET FEATURES command. + */ +static int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc, + const u8 *buf, int len, u16 *fp) +{ + struct ata_device *dev = qc->dev; + struct ata_taskfile *tf = &qc->tf; + u8 cdl_action; + + /* + * The first four bytes of ATA Feature Control mode page are a header, + * so offsets in mpage are off by 4 compared to buf. Same for len. + */ + if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) { + *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4); + return -EINVAL; + } + + /* Check cdl_ctrl */ + switch (buf[0] & 0x03) { + case 0: + /* Disable CDL */ + ata_dev_dbg(dev, "Disabling CDL\n"); + cdl_action = 0; + dev->flags &= ~ATA_DFLAG_CDL_ENABLED; + break; + case 0x02: + /* + * Enable CDL. Since CDL is mutually exclusive with NCQ + * priority, allow this only if NCQ priority is disabled. + */ + if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) { + ata_dev_err(dev, + "NCQ priority must be disabled to enable CDL\n"); + return -EINVAL; + } + ata_dev_dbg(dev, "Enabling CDL\n"); + cdl_action = 1; + dev->flags |= ATA_DFLAG_CDL_ENABLED; + break; + default: + *fp = 0; + return -EINVAL; + } + + tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; + tf->protocol = ATA_PROT_NODATA; + tf->command = ATA_CMD_SET_FEATURES; + tf->feature = SETFEATURES_CDL; + tf->nsect = cdl_action; + + return 1; +} + +/** + * ata_mselect_control - Simulate MODE SELECT for control page + * @qc: Storage for translated ATA taskfile + * @spg: target sub-page of the control page + * @buf: input buffer + * @len: number of valid bytes in the input buffer + * @fp: out parameter for the failed field on error + * + * Prepare a taskfile to modify caching information for the device. + * + * LOCKING: + * None. + */ +static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg, + const u8 *buf, int len, u16 *fp) +{ + switch (spg) { + case 0: + return ata_mselect_control_spg0(qc, buf, len, fp); + case ATA_FEATURE_SUB_MPAGE: + return ata_mselect_control_ata_feature(qc, buf, len, fp); + default: + return -EINVAL; + } +} + /** * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands * @qc: Storage for translated ATA taskfile @@ -3974,14 +3986,13 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; const u8 *cdb = scmd->cmnd; - const u8 *p; u8 pg, spg; unsigned six_byte, pg_len, hdr_len, bd_len; - int len; + int len, ret; u16 fp = (u16)-1; u8 bp = 0xff; - - VPRINTK("ENTER\n"); + u8 buffer[64]; + const u8 *p = buffer; six_byte = (cdb[0] == MODE_SELECT); if (six_byte) { @@ -3998,7 +4009,7 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) goto invalid_fld; } - len = (cdb[7] << 8) + cdb[8]; + len = get_unaligned_be16(&cdb[7]); hdr_len = 8; } @@ -4013,16 +4024,18 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) goto invalid_param_len; - p = page_address(sg_page(scsi_sglist(scmd))); - /* Move past header and block descriptors. */ if (len < hdr_len) goto invalid_param_len; + if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), + buffer, sizeof(buffer))) + goto invalid_param_len; + if (six_byte) bd_len = p[3]; else - bd_len = (p[6] << 8) + p[7]; + bd_len = get_unaligned_be16(&p[6]); len -= hdr_len; p += hdr_len; @@ -4046,7 +4059,7 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) goto invalid_param_len; spg = p[1]; - pg_len = (p[2] << 8) | p[3]; + pg_len = get_unaligned_be16(&p[2]); p += 4; len -= 4; } else { @@ -4060,13 +4073,29 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) } /* - * No mode subpages supported (yet) but asking for _all_ - * subpages may be valid + * Supported subpages: all subpages and ATA feature sub-page f2h of + * the control page. */ - if (spg && (spg != ALL_SUB_MPAGES)) { - fp = (p[0] & 0x40) ? 1 : 0; - fp += hdr_len + bd_len; - goto invalid_param; + if (spg) { + switch (spg) { + case ALL_SUB_MPAGES: + /* All subpages is not supported for the control page */ + if (pg == CONTROL_MPAGE) { + fp = (p[0] & 0x40) ? 1 : 0; + fp += hdr_len + bd_len; + goto invalid_param; + } + break; + case ATA_FEATURE_SUB_MPAGE: + if (qc->dev->flags & ATA_DFLAG_CDL && + pg == CONTROL_MPAGE) + break; + fallthrough; + default: + fp = (p[0] & 0x40) ? 1 : 0; + fp += hdr_len + bd_len; + goto invalid_param; + } } if (pg_len > len) goto invalid_param_len; @@ -4079,14 +4108,16 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) } break; case CONTROL_MPAGE: - if (ata_mselect_control(qc, p, pg_len, &fp) < 0) { + ret = ata_mselect_control(qc, spg, p, pg_len, &fp); + if (ret < 0) { fp += hdr_len + bd_len; goto invalid_param; - } else { - goto skip; /* No ATA command to send */ } + if (!ret) + goto skip; /* No ATA command to send */ break; - default: /* invalid page code */ + default: + /* Invalid page code */ fp = bd_len + hdr_len; goto invalid_param; } @@ -4239,6 +4270,7 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) return ata_scsi_write_same_xlat; case SYNCHRONIZE_CACHE: + case SYNCHRONIZE_CACHE_16: if (ata_try_flush_cache(dev)) return ata_scsi_flush_xlat; break; @@ -4257,7 +4289,6 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) case MODE_SELECT: case MODE_SELECT_10: return ata_scsi_mode_select_xlat; - break; case ZBC_IN: return ata_scsi_zbc_in_xlat; @@ -4278,74 +4309,58 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) return NULL; } -/** - * ata_scsi_dump_cdb - dump SCSI command contents to dmesg - * @ap: ATA port to which the command was being sent - * @cmd: SCSI command to dump - * - * Prints the contents of a SCSI command via printk(). - */ - -static inline void ata_scsi_dump_cdb(struct ata_port *ap, - struct scsi_cmnd *cmd) -{ -#ifdef ATA_VERBOSE_DEBUG - struct scsi_device *scsidev = cmd->device; - - VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n", - ap->print_id, - scsidev->channel, scsidev->id, scsidev->lun, - cmd->cmnd); -#endif -} - -static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, - struct ata_device *dev) +int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev) { + struct ata_port *ap = dev->link->ap; u8 scsi_op = scmd->cmnd[0]; ata_xlat_func_t xlat_func; - int rc = 0; + + /* + * scsi_queue_rq() will defer commands if scsi_host_in_recovery(). + * However, this check is done without holding the ap->lock (a libata + * specific lock), so we can have received an error irq since then, + * therefore we must check if EH is pending or running, while holding + * ap->lock. + */ + if (ata_port_eh_scheduled(ap)) + return SCSI_MLQUEUE_DEVICE_BUSY; + + if (unlikely(!scmd->cmd_len)) + goto bad_cdb_len; if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { - if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) + if (unlikely(scmd->cmd_len > dev->cdb_len)) goto bad_cdb_len; xlat_func = ata_get_xlat_func(dev, scsi_op); - } else { - if (unlikely(!scmd->cmd_len)) - goto bad_cdb_len; + } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { + /* relay SCSI command to ATAPI device */ + int len = COMMAND_SIZE(scsi_op); - xlat_func = NULL; - if (likely((scsi_op != ATA_16) || !atapi_passthru16)) { - /* relay SCSI command to ATAPI device */ - int len = COMMAND_SIZE(scsi_op); - if (unlikely(len > scmd->cmd_len || - len > dev->cdb_len || - scmd->cmd_len > ATAPI_CDB_LEN)) - goto bad_cdb_len; + if (unlikely(len > scmd->cmd_len || + len > dev->cdb_len || + scmd->cmd_len > ATAPI_CDB_LEN)) + goto bad_cdb_len; - xlat_func = atapi_xlat; - } else { - /* ATA_16 passthru, treat as an ATA command */ - if (unlikely(scmd->cmd_len > 16)) - goto bad_cdb_len; + xlat_func = atapi_xlat; + } else { + /* ATA_16 passthru, treat as an ATA command */ + if (unlikely(scmd->cmd_len > 16)) + goto bad_cdb_len; - xlat_func = ata_get_xlat_func(dev, scsi_op); - } + xlat_func = ata_get_xlat_func(dev, scsi_op); } if (xlat_func) - rc = ata_scsi_translate(dev, scmd, xlat_func); - else - ata_scsi_simulate(dev, scmd); + return ata_scsi_translate(dev, scmd, xlat_func); - return rc; + ata_scsi_simulate(dev, scmd); + + return 0; bad_cdb_len: - DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n", - scmd->cmd_len, scsi_op, dev->cdb_len); scmd->result = DID_ERROR << 16; - scmd->scsi_done(scmd); + scsi_done(scmd); return 0; } @@ -4380,20 +4395,19 @@ int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) spin_lock_irqsave(ap->lock, irq_flags); - ata_scsi_dump_cdb(ap, cmd); - dev = ata_scsi_find_dev(ap, scsidev); if (likely(dev)) rc = __ata_scsi_queuecmd(cmd, dev); else { cmd->result = (DID_BAD_TARGET << 16); - cmd->scsi_done(cmd); + scsi_done(cmd); } spin_unlock_irqrestore(ap->lock, irq_flags); return rc; } +EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); /** * ata_scsi_simulate - simulate SCSI command on ATA device @@ -4409,84 +4423,38 @@ int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd) void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) { - struct ata_scsi_args args; const u8 *scsicmd = cmd->cmnd; u8 tmp8; - args.dev = dev; - args.id = dev->id; - args.cmd = cmd; - switch(scsicmd[0]) { case INQUIRY: - if (scsicmd[1] & 2) /* is CmdDt set? */ - ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); - else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); - else switch (scsicmd[2]) { - case 0x00: - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); - break; - case 0x80: - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); - break; - case 0x83: - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); - break; - case 0x89: - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89); - break; - case 0xb0: - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0); - break; - case 0xb1: - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1); - break; - case 0xb2: - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2); - break; - case 0xb6: - if (dev->flags & ATA_DFLAG_ZAC) { - ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6); - break; - } - /* Fallthrough */ - default: - ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); - break; - } + ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_inquiry); break; case MODE_SENSE: case MODE_SENSE_10: - ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); + ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_mode_sense); break; case READ_CAPACITY: - ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); - break; - case SERVICE_ACTION_IN_16: - if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) - ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); - else - ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); + ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_read_cap); break; case REPORT_LUNS: - ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); + ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_report_luns); break; case REQUEST_SENSE: ata_scsi_set_sense(dev, cmd, 0, 0, 0); - cmd->result = (DRIVER_SENSE << 24); break; /* if we reach this, then writeback caching is disabled, * turning this into a no-op. */ case SYNCHRONIZE_CACHE: - /* fall through */ + case SYNCHRONIZE_CACHE_16: + fallthrough; /* no-op's, complete with success */ case REZERO_UNIT: @@ -4502,10 +4470,7 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) break; case MAINTENANCE_IN: - if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES) - ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in); - else - ata_scsi_set_invalid_field(dev, cmd, 1, 0xff); + ata_scsi_rbuf_fill(dev, cmd, ata_scsiop_maint_in); break; /* all other commands */ @@ -4515,10 +4480,10 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd) break; } - cmd->scsi_done(cmd); + scsi_done(cmd); } -int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) +int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht) { int i, rc; @@ -4549,26 +4514,51 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht) */ shost->max_host_blocked = 1; - rc = scsi_add_host_with_dma(ap->scsi_host, - &ap->tdev, ap->host->dev); + rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev); if (rc) - goto err_add; + goto err_alloc; } return 0; - err_add: - scsi_host_put(host->ports[i]->scsi_host); err_alloc: while (--i >= 0) { struct Scsi_Host *shost = host->ports[i]->scsi_host; + /* scsi_host_put() is in ata_devres_release() */ scsi_remove_host(shost); - scsi_host_put(shost); } return rc; } +#ifdef CONFIG_OF +static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) +{ + struct scsi_device *sdev = dev->sdev; + struct device *d = ap->host->dev; + struct device_node *np = d->of_node; + struct device_node *child; + + for_each_available_child_of_node(np, child) { + int ret; + u32 val; + + ret = of_property_read_u32(child, "reg", &val); + if (ret) + continue; + if (val == dev->devno) { + dev_dbg(d, "found matching device node\n"); + sdev->sdev_gendev.of_node = child; + return; + } + } +} +#else +static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap) +{ +} +#endif + void ata_scsi_scan_host(struct ata_port *ap, int sync) { int tries = 5; @@ -4594,6 +4584,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync) NULL); if (!IS_ERR(sdev)) { dev->sdev = sdev; + ata_scsi_assign_ofnode(dev, ap); scsi_device_put(sdev); } else { dev->sdev = NULL; @@ -4646,24 +4637,23 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync) * ata_scsi_offline_dev - offline attached SCSI device * @dev: ATA device to offline attached SCSI device for * - * This function is called from ata_eh_hotplug() and responsible - * for taking the SCSI device attached to @dev offline. This - * function is called with host lock which protects dev->sdev - * against clearing. + * This function is called from ata_eh_detach_dev() and is responsible for + * taking the SCSI device attached to @dev offline. This function is + * called with host lock which protects dev->sdev against clearing. * * LOCKING: * spin_lock_irqsave(host lock) * * RETURNS: - * 1 if attached SCSI device exists, 0 otherwise. + * true if attached SCSI device exists, false otherwise. */ -int ata_scsi_offline_dev(struct ata_device *dev) +bool ata_scsi_offline_dev(struct ata_device *dev) { if (dev->sdev) { scsi_device_set_state(dev->sdev, SDEV_OFFLINE); - return 1; + return true; } - return 0; + return false; } /** @@ -4733,16 +4723,15 @@ static void ata_scsi_handle_link_detach(struct ata_link *link) ata_for_each_dev(dev, link, ALL) { unsigned long flags; - if (!(dev->flags & ATA_DFLAG_DETACHED)) + spin_lock_irqsave(ap->lock, flags); + if (!(dev->flags & ATA_DFLAG_DETACHED)) { + spin_unlock_irqrestore(ap->lock, flags); continue; + } - spin_lock_irqsave(ap->lock, flags); dev->flags &= ~ATA_DFLAG_DETACHED; spin_unlock_irqrestore(ap->lock, flags); - if (zpodd_dev_enabled(dev)) - zpodd_exit(dev); - ata_scsi_remove_dev(dev); } } @@ -4782,33 +4771,9 @@ void ata_scsi_hotplug(struct work_struct *work) container_of(work, struct ata_port, hotplug_task.work); int i; - if (ap->pflags & ATA_PFLAG_UNLOADING) { - DPRINTK("ENTER/EXIT - unloading\n"); + if (ap->pflags & ATA_PFLAG_UNLOADING) return; - } - /* - * XXX - UGLY HACK - * - * The block layer suspend/resume path is fundamentally broken due - * to freezable kthreads and workqueue and may deadlock if a block - * device gets removed while resume is in progress. I don't know - * what the solution is short of removing freezable kthreads and - * workqueues altogether. - * - * The following is an ugly hack to avoid kicking off device - * removal while freezer is active. This is a joke but does avoid - * this particular deadlock scenario. - * - * https://bugzilla.kernel.org/show_bug.cgi?id=62801 - * http://marc.info/?l=linux-kernel&m=138695698516487 - */ -#ifdef CONFIG_FREEZER - while (pm_freezing) - msleep(10); -#endif - - DPRINTK("ENTER\n"); mutex_lock(&ap->scsi_scan_mutex); /* Unplug detached devices. We cannot use link iterator here @@ -4824,7 +4789,6 @@ void ata_scsi_hotplug(struct work_struct *work) ata_scsi_scan_host(ap, 0); mutex_unlock(&ap->scsi_scan_mutex); - DPRINTK("EXIT\n"); } /** @@ -4850,9 +4814,6 @@ int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, unsigned long flags; int devno, rc = 0; - if (!ap->ops->error_handler) - return -EOPNOTSUPP; - if (lun != SCAN_WILD_CARD && lun) return -EINVAL; @@ -4910,10 +4871,12 @@ int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, void ata_scsi_dev_rescan(struct work_struct *work) { struct ata_port *ap = - container_of(work, struct ata_port, scsi_rescan_task); + container_of(work, struct ata_port, scsi_rescan_task.work); struct ata_link *link; struct ata_device *dev; unsigned long flags; + bool do_resume; + int ret = 0; mutex_lock(&ap->scsi_scan_mutex); spin_lock_irqsave(ap->lock, flags); @@ -4922,229 +4885,45 @@ void ata_scsi_dev_rescan(struct work_struct *work) ata_for_each_dev(dev, link, ENABLED) { struct scsi_device *sdev = dev->sdev; + /* + * If the port was suspended before this was scheduled, + * bail out. + */ + if (ap->pflags & ATA_PFLAG_SUSPENDED) + goto unlock_ap; + if (!sdev) continue; if (scsi_device_get(sdev)) continue; + do_resume = dev->flags & ATA_DFLAG_RESUMING; + spin_unlock_irqrestore(ap->lock, flags); - scsi_rescan_device(&(sdev->sdev_gendev)); + if (do_resume) { + ret = scsi_resume_device(sdev); + if (ret == -EWOULDBLOCK) { + scsi_device_put(sdev); + goto unlock_scan; + } + dev->flags &= ~ATA_DFLAG_RESUMING; + } + ret = scsi_rescan_device(sdev); scsi_device_put(sdev); spin_lock_irqsave(ap->lock, flags); + + if (ret) + goto unlock_ap; } } +unlock_ap: spin_unlock_irqrestore(ap->lock, flags); +unlock_scan: mutex_unlock(&ap->scsi_scan_mutex); -} - -/** - * ata_sas_port_alloc - Allocate port for a SAS attached SATA device - * @host: ATA host container for all SAS ports - * @port_info: Information from low-level host driver - * @shost: SCSI host that the scsi device is attached to - * - * LOCKING: - * PCI/etc. bus probe sem. - * - * RETURNS: - * ata_port pointer on success / NULL on failure. - */ - -struct ata_port *ata_sas_port_alloc(struct ata_host *host, - struct ata_port_info *port_info, - struct Scsi_Host *shost) -{ - struct ata_port *ap; - - ap = ata_port_alloc(host); - if (!ap) - return NULL; - - ap->port_no = 0; - ap->lock = &host->lock; - ap->pio_mask = port_info->pio_mask; - ap->mwdma_mask = port_info->mwdma_mask; - ap->udma_mask = port_info->udma_mask; - ap->flags |= port_info->flags; - ap->ops = port_info->port_ops; - ap->cbl = ATA_CBL_SATA; - - return ap; -} -EXPORT_SYMBOL_GPL(ata_sas_port_alloc); - -/** - * ata_sas_port_start - Set port up for dma. - * @ap: Port to initialize - * - * Called just after data structures for each port are - * initialized. - * - * May be used as the port_start() entry in ata_port_operations. - * - * LOCKING: - * Inherited from caller. - */ -int ata_sas_port_start(struct ata_port *ap) -{ - /* - * the port is marked as frozen at allocation time, but if we don't - * have new eh, we won't thaw it - */ - if (!ap->ops->error_handler) - ap->pflags &= ~ATA_PFLAG_FROZEN; - return 0; -} -EXPORT_SYMBOL_GPL(ata_sas_port_start); - -/** - * ata_port_stop - Undo ata_sas_port_start() - * @ap: Port to shut down - * - * May be used as the port_stop() entry in ata_port_operations. - * - * LOCKING: - * Inherited from caller. - */ - -void ata_sas_port_stop(struct ata_port *ap) -{ -} -EXPORT_SYMBOL_GPL(ata_sas_port_stop); - -/** - * ata_sas_async_probe - simply schedule probing and return - * @ap: Port to probe - * - * For batch scheduling of probe for sas attached ata devices, assumes - * the port has already been through ata_sas_port_init() - */ -void ata_sas_async_probe(struct ata_port *ap) -{ - __ata_port_probe(ap); -} -EXPORT_SYMBOL_GPL(ata_sas_async_probe); - -int ata_sas_sync_probe(struct ata_port *ap) -{ - return ata_port_probe(ap); -} -EXPORT_SYMBOL_GPL(ata_sas_sync_probe); - - -/** - * ata_sas_port_init - Initialize a SATA device - * @ap: SATA port to initialize - * - * LOCKING: - * PCI/etc. bus probe sem. - * - * RETURNS: - * Zero on success, non-zero on error. - */ - -int ata_sas_port_init(struct ata_port *ap) -{ - int rc = ap->ops->port_start(ap); - - if (rc) - return rc; - ap->print_id = atomic_inc_return(&ata_print_id); - return 0; -} -EXPORT_SYMBOL_GPL(ata_sas_port_init); - -int ata_sas_tport_add(struct device *parent, struct ata_port *ap) -{ - return ata_tport_add(parent, ap); -} -EXPORT_SYMBOL_GPL(ata_sas_tport_add); - -void ata_sas_tport_delete(struct ata_port *ap) -{ - ata_tport_delete(ap); -} -EXPORT_SYMBOL_GPL(ata_sas_tport_delete); - -/** - * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc - * @ap: SATA port to destroy - * - */ - -void ata_sas_port_destroy(struct ata_port *ap) -{ - if (ap->ops->port_stop) - ap->ops->port_stop(ap); - kfree(ap); -} -EXPORT_SYMBOL_GPL(ata_sas_port_destroy); -/** - * ata_sas_slave_configure - Default slave_config routine for libata devices - * @sdev: SCSI device to configure - * @ap: ATA port to which SCSI device is attached - * - * RETURNS: - * Zero. - */ - -int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) -{ - ata_scsi_sdev_config(sdev); - ata_scsi_dev_config(sdev, ap->link.device); - return 0; -} -EXPORT_SYMBOL_GPL(ata_sas_slave_configure); - -/** - * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device - * @cmd: SCSI command to be sent - * @ap: ATA port to which the command is being sent - * - * RETURNS: - * Return value from __ata_scsi_queuecmd() if @cmd can be queued, - * 0 otherwise. - */ - -int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap) -{ - int rc = 0; - - ata_scsi_dump_cdb(ap, cmd); - - if (likely(ata_dev_enabled(ap->link.device))) - rc = __ata_scsi_queuecmd(cmd, ap->link.device); - else { - cmd->result = (DID_BAD_TARGET << 16); - cmd->scsi_done(cmd); - } - return rc; -} -EXPORT_SYMBOL_GPL(ata_sas_queuecmd); - -int ata_sas_allocate_tag(struct ata_port *ap) -{ - unsigned int max_queue = ap->host->n_tags; - unsigned int i, tag; - - for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) { - tag = tag < max_queue ? tag : 0; - - /* the last tag is reserved for internal command. */ - if (ata_tag_internal(tag)) - continue; - - if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) { - ap->sas_last_tag = tag; - return tag; - } - } - return -1; -} - -void ata_sas_free_tag(unsigned int tag, struct ata_port *ap) -{ - clear_bit(tag, &ap->sas_tag_allocated); + /* Reschedule with a delay if scsi_rescan_device() returned an error */ + if (ret) + schedule_delayed_work(&ap->scsi_rescan_task, + msecs_to_jiffies(5)); } |