mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 17:58:00 +07:00
6fe8c1dbef
SCSI Well-known logical units generally don't have any scsi driver associated with it which means no one will call scsi_autopm_put_device() on these wlun scsi devices and this would result in keeping the corresponding scsi device always active (hence LLD can't be suspended as well). Same exact problem can be seen for other scsi device representing normal logical unit whose driver is yet to be loaded. This patch fixes the above problem with this approach: - make the scsi_autopm_put_device call at the end of scsi_sysfs_add_sdev to make it balance out the get earlier in the function. - let drivers do paired get/put calls in their probe methods. Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
1298 lines
33 KiB
C
1298 lines
33 KiB
C
/*
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* scsi_sysfs.c
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*
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* SCSI sysfs interface routines.
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*
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* Created to pull SCSI mid layer sysfs routines into one file.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/device.h>
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#include <linux/pm_runtime.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_driver.h>
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#include "scsi_priv.h"
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#include "scsi_logging.h"
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static struct device_type scsi_dev_type;
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static const struct {
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enum scsi_device_state value;
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char *name;
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} sdev_states[] = {
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{ SDEV_CREATED, "created" },
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{ SDEV_RUNNING, "running" },
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{ SDEV_CANCEL, "cancel" },
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{ SDEV_DEL, "deleted" },
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{ SDEV_QUIESCE, "quiesce" },
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{ SDEV_OFFLINE, "offline" },
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{ SDEV_TRANSPORT_OFFLINE, "transport-offline" },
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{ SDEV_BLOCK, "blocked" },
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{ SDEV_CREATED_BLOCK, "created-blocked" },
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};
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const char *scsi_device_state_name(enum scsi_device_state state)
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{
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int i;
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char *name = NULL;
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for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
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if (sdev_states[i].value == state) {
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name = sdev_states[i].name;
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break;
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}
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}
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return name;
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}
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static const struct {
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enum scsi_host_state value;
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char *name;
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} shost_states[] = {
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{ SHOST_CREATED, "created" },
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{ SHOST_RUNNING, "running" },
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{ SHOST_CANCEL, "cancel" },
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{ SHOST_DEL, "deleted" },
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{ SHOST_RECOVERY, "recovery" },
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{ SHOST_CANCEL_RECOVERY, "cancel/recovery" },
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{ SHOST_DEL_RECOVERY, "deleted/recovery", },
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};
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const char *scsi_host_state_name(enum scsi_host_state state)
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{
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int i;
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char *name = NULL;
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for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
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if (shost_states[i].value == state) {
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name = shost_states[i].name;
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break;
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}
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}
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return name;
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}
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static int check_set(unsigned long long *val, char *src)
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{
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char *last;
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if (strncmp(src, "-", 20) == 0) {
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*val = SCAN_WILD_CARD;
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} else {
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/*
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* Doesn't check for int overflow
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*/
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*val = simple_strtoull(src, &last, 0);
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if (*last != '\0')
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return 1;
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}
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return 0;
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}
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static int scsi_scan(struct Scsi_Host *shost, const char *str)
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{
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char s1[15], s2[15], s3[17], junk;
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unsigned long long channel, id, lun;
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int res;
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res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk);
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if (res != 3)
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return -EINVAL;
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if (check_set(&channel, s1))
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return -EINVAL;
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if (check_set(&id, s2))
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return -EINVAL;
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if (check_set(&lun, s3))
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return -EINVAL;
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if (shost->transportt->user_scan)
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res = shost->transportt->user_scan(shost, channel, id, lun);
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else
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res = scsi_scan_host_selected(shost, channel, id, lun, 1);
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return res;
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}
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/*
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* shost_show_function: macro to create an attr function that can be used to
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* show a non-bit field.
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*/
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#define shost_show_function(name, field, format_string) \
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static ssize_t \
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show_##name (struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct Scsi_Host *shost = class_to_shost(dev); \
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return snprintf (buf, 20, format_string, shost->field); \
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}
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/*
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* shost_rd_attr: macro to create a function and attribute variable for a
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* read only field.
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*/
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#define shost_rd_attr2(name, field, format_string) \
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shost_show_function(name, field, format_string) \
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static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
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#define shost_rd_attr(field, format_string) \
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shost_rd_attr2(field, field, format_string)
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/*
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* Create the actual show/store functions and data structures.
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*/
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static ssize_t
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store_scan(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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int res;
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res = scsi_scan(shost, buf);
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if (res == 0)
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res = count;
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return res;
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};
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static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
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static ssize_t
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store_shost_state(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int i;
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struct Scsi_Host *shost = class_to_shost(dev);
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enum scsi_host_state state = 0;
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for (i = 0; i < ARRAY_SIZE(shost_states); i++) {
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const int len = strlen(shost_states[i].name);
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if (strncmp(shost_states[i].name, buf, len) == 0 &&
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buf[len] == '\n') {
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state = shost_states[i].value;
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break;
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}
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}
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if (!state)
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return -EINVAL;
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if (scsi_host_set_state(shost, state))
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return -EINVAL;
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return count;
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}
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static ssize_t
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show_shost_state(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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const char *name = scsi_host_state_name(shost->shost_state);
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if (!name)
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return -EINVAL;
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return snprintf(buf, 20, "%s\n", name);
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}
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/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */
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struct device_attribute dev_attr_hstate =
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__ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state);
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static ssize_t
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show_shost_mode(unsigned int mode, char *buf)
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{
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ssize_t len = 0;
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if (mode & MODE_INITIATOR)
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len = sprintf(buf, "%s", "Initiator");
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if (mode & MODE_TARGET)
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len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target");
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len += sprintf(buf + len, "\n");
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return len;
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}
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static ssize_t
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show_shost_supported_mode(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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unsigned int supported_mode = shost->hostt->supported_mode;
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if (supported_mode == MODE_UNKNOWN)
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/* by default this should be initiator */
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supported_mode = MODE_INITIATOR;
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return show_shost_mode(supported_mode, buf);
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}
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static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL);
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static ssize_t
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show_shost_active_mode(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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if (shost->active_mode == MODE_UNKNOWN)
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return snprintf(buf, 20, "unknown\n");
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else
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return show_shost_mode(shost->active_mode, buf);
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}
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static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL);
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static int check_reset_type(const char *str)
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{
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if (sysfs_streq(str, "adapter"))
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return SCSI_ADAPTER_RESET;
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else if (sysfs_streq(str, "firmware"))
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return SCSI_FIRMWARE_RESET;
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else
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return 0;
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}
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static ssize_t
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store_host_reset(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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struct scsi_host_template *sht = shost->hostt;
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int ret = -EINVAL;
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int type;
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type = check_reset_type(buf);
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if (!type)
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goto exit_store_host_reset;
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if (sht->host_reset)
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ret = sht->host_reset(shost, type);
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exit_store_host_reset:
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if (ret == 0)
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ret = count;
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return ret;
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}
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static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset);
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static ssize_t
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show_shost_eh_deadline(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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if (shost->eh_deadline == -1)
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return snprintf(buf, strlen("off") + 2, "off\n");
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return sprintf(buf, "%u\n", shost->eh_deadline / HZ);
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}
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static ssize_t
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store_shost_eh_deadline(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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int ret = -EINVAL;
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unsigned long deadline, flags;
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if (shost->transportt &&
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(shost->transportt->eh_strategy_handler ||
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!shost->hostt->eh_host_reset_handler))
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return ret;
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if (!strncmp(buf, "off", strlen("off")))
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deadline = -1;
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else {
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ret = kstrtoul(buf, 10, &deadline);
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if (ret)
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return ret;
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if (deadline * HZ > UINT_MAX)
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return -EINVAL;
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}
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spin_lock_irqsave(shost->host_lock, flags);
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if (scsi_host_in_recovery(shost))
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ret = -EBUSY;
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else {
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if (deadline == -1)
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shost->eh_deadline = -1;
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else
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shost->eh_deadline = deadline * HZ;
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ret = count;
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}
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spin_unlock_irqrestore(shost->host_lock, flags);
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return ret;
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}
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static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline);
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shost_rd_attr(use_blk_mq, "%d\n");
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shost_rd_attr(unique_id, "%u\n");
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shost_rd_attr(cmd_per_lun, "%hd\n");
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shost_rd_attr(can_queue, "%hd\n");
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shost_rd_attr(sg_tablesize, "%hu\n");
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shost_rd_attr(sg_prot_tablesize, "%hu\n");
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shost_rd_attr(unchecked_isa_dma, "%d\n");
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shost_rd_attr(prot_capabilities, "%u\n");
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shost_rd_attr(prot_guard_type, "%hd\n");
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shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
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static ssize_t
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show_host_busy(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct Scsi_Host *shost = class_to_shost(dev);
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return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy));
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}
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static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL);
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static struct attribute *scsi_sysfs_shost_attrs[] = {
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&dev_attr_use_blk_mq.attr,
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&dev_attr_unique_id.attr,
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&dev_attr_host_busy.attr,
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&dev_attr_cmd_per_lun.attr,
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&dev_attr_can_queue.attr,
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&dev_attr_sg_tablesize.attr,
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&dev_attr_sg_prot_tablesize.attr,
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&dev_attr_unchecked_isa_dma.attr,
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&dev_attr_proc_name.attr,
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&dev_attr_scan.attr,
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&dev_attr_hstate.attr,
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&dev_attr_supported_mode.attr,
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&dev_attr_active_mode.attr,
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&dev_attr_prot_capabilities.attr,
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&dev_attr_prot_guard_type.attr,
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&dev_attr_host_reset.attr,
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&dev_attr_eh_deadline.attr,
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NULL
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};
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struct attribute_group scsi_shost_attr_group = {
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.attrs = scsi_sysfs_shost_attrs,
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};
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const struct attribute_group *scsi_sysfs_shost_attr_groups[] = {
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&scsi_shost_attr_group,
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NULL
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};
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static void scsi_device_cls_release(struct device *class_dev)
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{
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struct scsi_device *sdev;
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sdev = class_to_sdev(class_dev);
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put_device(&sdev->sdev_gendev);
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}
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static void scsi_device_dev_release_usercontext(struct work_struct *work)
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{
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struct scsi_device *sdev;
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struct device *parent;
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struct list_head *this, *tmp;
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unsigned long flags;
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sdev = container_of(work, struct scsi_device, ew.work);
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parent = sdev->sdev_gendev.parent;
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spin_lock_irqsave(sdev->host->host_lock, flags);
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list_del(&sdev->siblings);
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list_del(&sdev->same_target_siblings);
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list_del(&sdev->starved_entry);
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spin_unlock_irqrestore(sdev->host->host_lock, flags);
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cancel_work_sync(&sdev->event_work);
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list_for_each_safe(this, tmp, &sdev->event_list) {
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struct scsi_event *evt;
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evt = list_entry(this, struct scsi_event, node);
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list_del(&evt->node);
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kfree(evt);
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}
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blk_put_queue(sdev->request_queue);
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/* NULL queue means the device can't be used */
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sdev->request_queue = NULL;
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kfree(sdev->vpd_pg83);
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kfree(sdev->vpd_pg80);
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kfree(sdev->inquiry);
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kfree(sdev);
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if (parent)
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put_device(parent);
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}
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static void scsi_device_dev_release(struct device *dev)
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{
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struct scsi_device *sdp = to_scsi_device(dev);
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execute_in_process_context(scsi_device_dev_release_usercontext,
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&sdp->ew);
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}
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static struct class sdev_class = {
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.name = "scsi_device",
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.dev_release = scsi_device_cls_release,
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};
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/* all probing is done in the individual ->probe routines */
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static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
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{
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struct scsi_device *sdp;
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if (dev->type != &scsi_dev_type)
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return 0;
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sdp = to_scsi_device(dev);
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if (sdp->no_uld_attach)
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return 0;
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return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
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}
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static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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struct scsi_device *sdev;
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if (dev->type != &scsi_dev_type)
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return 0;
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sdev = to_scsi_device(dev);
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add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
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return 0;
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}
|
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struct bus_type scsi_bus_type = {
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.name = "scsi",
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.match = scsi_bus_match,
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.uevent = scsi_bus_uevent,
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#ifdef CONFIG_PM
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.pm = &scsi_bus_pm_ops,
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#endif
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};
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EXPORT_SYMBOL_GPL(scsi_bus_type);
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|
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int scsi_sysfs_register(void)
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{
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int error;
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error = bus_register(&scsi_bus_type);
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if (!error) {
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error = class_register(&sdev_class);
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if (error)
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bus_unregister(&scsi_bus_type);
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}
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return error;
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}
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|
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void scsi_sysfs_unregister(void)
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{
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class_unregister(&sdev_class);
|
|
bus_unregister(&scsi_bus_type);
|
|
}
|
|
|
|
/*
|
|
* sdev_show_function: macro to create an attr function that can be used to
|
|
* show a non-bit field.
|
|
*/
|
|
#define sdev_show_function(field, format_string) \
|
|
static ssize_t \
|
|
sdev_show_##field (struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct scsi_device *sdev; \
|
|
sdev = to_scsi_device(dev); \
|
|
return snprintf (buf, 20, format_string, sdev->field); \
|
|
} \
|
|
|
|
/*
|
|
* sdev_rd_attr: macro to create a function and attribute variable for a
|
|
* read only field.
|
|
*/
|
|
#define sdev_rd_attr(field, format_string) \
|
|
sdev_show_function(field, format_string) \
|
|
static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
|
|
|
|
|
|
/*
|
|
* sdev_rw_attr: create a function and attribute variable for a
|
|
* read/write field.
|
|
*/
|
|
#define sdev_rw_attr(field, format_string) \
|
|
sdev_show_function(field, format_string) \
|
|
\
|
|
static ssize_t \
|
|
sdev_store_##field (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
struct scsi_device *sdev; \
|
|
sdev = to_scsi_device(dev); \
|
|
sscanf (buf, format_string, &sdev->field); \
|
|
return count; \
|
|
} \
|
|
static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
|
|
|
|
/* Currently we don't export bit fields, but we might in future,
|
|
* so leave this code in */
|
|
#if 0
|
|
/*
|
|
* sdev_rd_attr: create a function and attribute variable for a
|
|
* read/write bit field.
|
|
*/
|
|
#define sdev_rw_attr_bit(field) \
|
|
sdev_show_function(field, "%d\n") \
|
|
\
|
|
static ssize_t \
|
|
sdev_store_##field (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
int ret; \
|
|
struct scsi_device *sdev; \
|
|
ret = scsi_sdev_check_buf_bit(buf); \
|
|
if (ret >= 0) { \
|
|
sdev = to_scsi_device(dev); \
|
|
sdev->field = ret; \
|
|
ret = count; \
|
|
} \
|
|
return ret; \
|
|
} \
|
|
static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
|
|
|
|
/*
|
|
* scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
|
|
* else return -EINVAL.
|
|
*/
|
|
static int scsi_sdev_check_buf_bit(const char *buf)
|
|
{
|
|
if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
|
|
if (buf[0] == '1')
|
|
return 1;
|
|
else if (buf[0] == '0')
|
|
return 0;
|
|
else
|
|
return -EINVAL;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
/*
|
|
* Create the actual show/store functions and data structures.
|
|
*/
|
|
sdev_rd_attr (type, "%d\n");
|
|
sdev_rd_attr (scsi_level, "%d\n");
|
|
sdev_rd_attr (vendor, "%.8s\n");
|
|
sdev_rd_attr (model, "%.16s\n");
|
|
sdev_rd_attr (rev, "%.4s\n");
|
|
|
|
static ssize_t
|
|
sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
|
|
}
|
|
static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);
|
|
|
|
static ssize_t
|
|
sdev_show_device_blocked(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked));
|
|
}
|
|
static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL);
|
|
|
|
/*
|
|
* TODO: can we make these symlinks to the block layer ones?
|
|
*/
|
|
static ssize_t
|
|
sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_timeout (struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev;
|
|
int timeout;
|
|
sdev = to_scsi_device(dev);
|
|
sscanf (buf, "%d\n", &timeout);
|
|
blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
|
|
|
|
static ssize_t
|
|
sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ);
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev;
|
|
unsigned int eh_timeout;
|
|
int err;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
|
|
sdev = to_scsi_device(dev);
|
|
err = kstrtouint(buf, 10, &eh_timeout);
|
|
if (err)
|
|
return err;
|
|
sdev->eh_timeout = eh_timeout * HZ;
|
|
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout);
|
|
|
|
static ssize_t
|
|
store_rescan_field (struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
scsi_rescan_device(dev);
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
|
|
|
|
static ssize_t
|
|
sdev_store_delete(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
if (device_remove_file_self(dev, attr))
|
|
scsi_remove_device(to_scsi_device(dev));
|
|
return count;
|
|
};
|
|
static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
|
|
|
|
static ssize_t
|
|
store_state_field(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int i;
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
enum scsi_device_state state = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
|
|
const int len = strlen(sdev_states[i].name);
|
|
if (strncmp(sdev_states[i].name, buf, len) == 0 &&
|
|
buf[len] == '\n') {
|
|
state = sdev_states[i].value;
|
|
break;
|
|
}
|
|
}
|
|
if (!state)
|
|
return -EINVAL;
|
|
|
|
if (scsi_device_set_state(sdev, state))
|
|
return -EINVAL;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t
|
|
show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
const char *name = scsi_device_state_name(sdev->sdev_state);
|
|
|
|
if (!name)
|
|
return -EINVAL;
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
}
|
|
|
|
static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
|
|
|
|
static ssize_t
|
|
show_queue_type_field(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
const char *name = "none";
|
|
|
|
if (sdev->ordered_tags)
|
|
name = "ordered";
|
|
else if (sdev->simple_tags)
|
|
name = "simple";
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
}
|
|
|
|
static ssize_t
|
|
store_queue_type_field(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
struct scsi_host_template *sht = sdev->host->hostt;
|
|
int tag_type = 0, retval;
|
|
int prev_tag_type = scsi_get_tag_type(sdev);
|
|
|
|
if (!sdev->tagged_supported || !sht->change_queue_type)
|
|
return -EINVAL;
|
|
|
|
if (strncmp(buf, "ordered", 7) == 0)
|
|
tag_type = MSG_ORDERED_TAG;
|
|
else if (strncmp(buf, "simple", 6) == 0)
|
|
tag_type = MSG_SIMPLE_TAG;
|
|
else if (strncmp(buf, "none", 4) != 0)
|
|
return -EINVAL;
|
|
|
|
if (tag_type == prev_tag_type)
|
|
return count;
|
|
|
|
retval = sht->change_queue_type(sdev, tag_type);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
|
|
store_queue_type_field);
|
|
|
|
#define sdev_vpd_pg_attr(_page) \
|
|
static ssize_t \
|
|
show_vpd_##_page(struct file *filp, struct kobject *kobj, \
|
|
struct bin_attribute *bin_attr, \
|
|
char *buf, loff_t off, size_t count) \
|
|
{ \
|
|
struct device *dev = container_of(kobj, struct device, kobj); \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
if (!sdev->vpd_##_page) \
|
|
return -EINVAL; \
|
|
return memory_read_from_buffer(buf, count, &off, \
|
|
sdev->vpd_##_page, \
|
|
sdev->vpd_##_page##_len); \
|
|
} \
|
|
static struct bin_attribute dev_attr_vpd_##_page = { \
|
|
.attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \
|
|
.size = 0, \
|
|
.read = show_vpd_##_page, \
|
|
};
|
|
|
|
sdev_vpd_pg_attr(pg83);
|
|
sdev_vpd_pg_attr(pg80);
|
|
|
|
static ssize_t
|
|
show_iostat_counterbits(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
|
|
}
|
|
|
|
static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
|
|
|
|
#define show_sdev_iostat(field) \
|
|
static ssize_t \
|
|
show_iostat_##field(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
unsigned long long count = atomic_read(&sdev->field); \
|
|
return snprintf(buf, 20, "0x%llx\n", count); \
|
|
} \
|
|
static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
|
|
|
|
show_sdev_iostat(iorequest_cnt);
|
|
show_sdev_iostat(iodone_cnt);
|
|
show_sdev_iostat(ioerr_cnt);
|
|
|
|
static ssize_t
|
|
sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
|
|
}
|
|
static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
|
|
|
|
#define DECLARE_EVT_SHOW(name, Cap_name) \
|
|
static ssize_t \
|
|
sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
|
|
return snprintf(buf, 20, "%d\n", val); \
|
|
}
|
|
|
|
#define DECLARE_EVT_STORE(name, Cap_name) \
|
|
static ssize_t \
|
|
sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
int val = simple_strtoul(buf, NULL, 0); \
|
|
if (val == 0) \
|
|
clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
|
|
else if (val == 1) \
|
|
set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
|
|
else \
|
|
return -EINVAL; \
|
|
return count; \
|
|
}
|
|
|
|
#define DECLARE_EVT(name, Cap_name) \
|
|
DECLARE_EVT_SHOW(name, Cap_name) \
|
|
DECLARE_EVT_STORE(name, Cap_name) \
|
|
static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
|
|
sdev_store_evt_##name);
|
|
#define REF_EVT(name) &dev_attr_evt_##name.attr
|
|
|
|
DECLARE_EVT(media_change, MEDIA_CHANGE)
|
|
DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
|
|
DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
|
|
DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
|
|
DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
|
|
DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
|
|
|
|
static ssize_t
|
|
sdev_store_queue_depth(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int depth, retval;
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
struct scsi_host_template *sht = sdev->host->hostt;
|
|
|
|
if (!sht->change_queue_depth)
|
|
return -EINVAL;
|
|
|
|
depth = simple_strtoul(buf, NULL, 0);
|
|
|
|
if (depth < 1)
|
|
return -EINVAL;
|
|
|
|
retval = sht->change_queue_depth(sdev, depth,
|
|
SCSI_QDEPTH_DEFAULT);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
sdev->max_queue_depth = sdev->queue_depth;
|
|
|
|
return count;
|
|
}
|
|
sdev_show_function(queue_depth, "%d\n");
|
|
|
|
static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
|
|
sdev_store_queue_depth);
|
|
|
|
static ssize_t
|
|
sdev_show_queue_ramp_up_period(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%u\n",
|
|
jiffies_to_msecs(sdev->queue_ramp_up_period));
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_queue_ramp_up_period(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
unsigned int period;
|
|
|
|
if (kstrtouint(buf, 10, &period))
|
|
return -EINVAL;
|
|
|
|
sdev->queue_ramp_up_period = msecs_to_jiffies(period);
|
|
return period;
|
|
}
|
|
|
|
static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
|
|
sdev_show_queue_ramp_up_period,
|
|
sdev_store_queue_ramp_up_period);
|
|
|
|
static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
|
|
struct attribute *attr, int i)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
|
|
|
|
if (attr == &dev_attr_queue_depth.attr &&
|
|
!sdev->host->hostt->change_queue_depth)
|
|
return S_IRUGO;
|
|
|
|
if (attr == &dev_attr_queue_ramp_up_period.attr &&
|
|
!sdev->host->hostt->change_queue_depth)
|
|
return 0;
|
|
|
|
if (attr == &dev_attr_queue_type.attr &&
|
|
!sdev->host->hostt->change_queue_type)
|
|
return S_IRUGO;
|
|
|
|
return attr->mode;
|
|
}
|
|
|
|
/* Default template for device attributes. May NOT be modified */
|
|
static struct attribute *scsi_sdev_attrs[] = {
|
|
&dev_attr_device_blocked.attr,
|
|
&dev_attr_type.attr,
|
|
&dev_attr_scsi_level.attr,
|
|
&dev_attr_device_busy.attr,
|
|
&dev_attr_vendor.attr,
|
|
&dev_attr_model.attr,
|
|
&dev_attr_rev.attr,
|
|
&dev_attr_rescan.attr,
|
|
&dev_attr_delete.attr,
|
|
&dev_attr_state.attr,
|
|
&dev_attr_timeout.attr,
|
|
&dev_attr_eh_timeout.attr,
|
|
&dev_attr_iocounterbits.attr,
|
|
&dev_attr_iorequest_cnt.attr,
|
|
&dev_attr_iodone_cnt.attr,
|
|
&dev_attr_ioerr_cnt.attr,
|
|
&dev_attr_modalias.attr,
|
|
&dev_attr_queue_depth.attr,
|
|
&dev_attr_queue_type.attr,
|
|
&dev_attr_queue_ramp_up_period.attr,
|
|
REF_EVT(media_change),
|
|
REF_EVT(inquiry_change_reported),
|
|
REF_EVT(capacity_change_reported),
|
|
REF_EVT(soft_threshold_reached),
|
|
REF_EVT(mode_parameter_change_reported),
|
|
REF_EVT(lun_change_reported),
|
|
NULL
|
|
};
|
|
|
|
static struct bin_attribute *scsi_sdev_bin_attrs[] = {
|
|
&dev_attr_vpd_pg83,
|
|
&dev_attr_vpd_pg80,
|
|
NULL
|
|
};
|
|
static struct attribute_group scsi_sdev_attr_group = {
|
|
.attrs = scsi_sdev_attrs,
|
|
.bin_attrs = scsi_sdev_bin_attrs,
|
|
.is_visible = scsi_sdev_attr_is_visible,
|
|
};
|
|
|
|
static const struct attribute_group *scsi_sdev_attr_groups[] = {
|
|
&scsi_sdev_attr_group,
|
|
NULL
|
|
};
|
|
|
|
static int scsi_target_add(struct scsi_target *starget)
|
|
{
|
|
int error;
|
|
|
|
if (starget->state != STARGET_CREATED)
|
|
return 0;
|
|
|
|
error = device_add(&starget->dev);
|
|
if (error) {
|
|
dev_err(&starget->dev, "target device_add failed, error %d\n", error);
|
|
return error;
|
|
}
|
|
transport_add_device(&starget->dev);
|
|
starget->state = STARGET_RUNNING;
|
|
|
|
pm_runtime_set_active(&starget->dev);
|
|
pm_runtime_enable(&starget->dev);
|
|
device_enable_async_suspend(&starget->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* scsi_sysfs_add_sdev - add scsi device to sysfs
|
|
* @sdev: scsi_device to add
|
|
*
|
|
* Return value:
|
|
* 0 on Success / non-zero on Failure
|
|
**/
|
|
int scsi_sysfs_add_sdev(struct scsi_device *sdev)
|
|
{
|
|
int error, i;
|
|
struct request_queue *rq = sdev->request_queue;
|
|
struct scsi_target *starget = sdev->sdev_target;
|
|
|
|
error = scsi_device_set_state(sdev, SDEV_RUNNING);
|
|
if (error)
|
|
return error;
|
|
|
|
error = scsi_target_add(starget);
|
|
if (error)
|
|
return error;
|
|
|
|
transport_configure_device(&starget->dev);
|
|
|
|
device_enable_async_suspend(&sdev->sdev_gendev);
|
|
scsi_autopm_get_target(starget);
|
|
pm_runtime_set_active(&sdev->sdev_gendev);
|
|
pm_runtime_forbid(&sdev->sdev_gendev);
|
|
pm_runtime_enable(&sdev->sdev_gendev);
|
|
scsi_autopm_put_target(starget);
|
|
|
|
scsi_autopm_get_device(sdev);
|
|
|
|
error = device_add(&sdev->sdev_gendev);
|
|
if (error) {
|
|
sdev_printk(KERN_INFO, sdev,
|
|
"failed to add device: %d\n", error);
|
|
return error;
|
|
}
|
|
device_enable_async_suspend(&sdev->sdev_dev);
|
|
error = device_add(&sdev->sdev_dev);
|
|
if (error) {
|
|
sdev_printk(KERN_INFO, sdev,
|
|
"failed to add class device: %d\n", error);
|
|
device_del(&sdev->sdev_gendev);
|
|
return error;
|
|
}
|
|
transport_add_device(&sdev->sdev_gendev);
|
|
sdev->is_visible = 1;
|
|
|
|
error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
|
|
|
|
if (error)
|
|
/* we're treating error on bsg register as non-fatal,
|
|
* so pretend nothing went wrong */
|
|
sdev_printk(KERN_INFO, sdev,
|
|
"Failed to register bsg queue, errno=%d\n", error);
|
|
|
|
/* add additional host specific attributes */
|
|
if (sdev->host->hostt->sdev_attrs) {
|
|
for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
|
|
error = device_create_file(&sdev->sdev_gendev,
|
|
sdev->host->hostt->sdev_attrs[i]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
}
|
|
|
|
scsi_autopm_put_device(sdev);
|
|
return error;
|
|
}
|
|
|
|
void __scsi_remove_device(struct scsi_device *sdev)
|
|
{
|
|
struct device *dev = &sdev->sdev_gendev;
|
|
|
|
if (sdev->is_visible) {
|
|
if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
|
|
return;
|
|
|
|
bsg_unregister_queue(sdev->request_queue);
|
|
device_unregister(&sdev->sdev_dev);
|
|
transport_remove_device(dev);
|
|
device_del(dev);
|
|
} else
|
|
put_device(&sdev->sdev_dev);
|
|
|
|
/*
|
|
* Stop accepting new requests and wait until all queuecommand() and
|
|
* scsi_run_queue() invocations have finished before tearing down the
|
|
* device.
|
|
*/
|
|
scsi_device_set_state(sdev, SDEV_DEL);
|
|
blk_cleanup_queue(sdev->request_queue);
|
|
cancel_work_sync(&sdev->requeue_work);
|
|
|
|
if (sdev->host->hostt->slave_destroy)
|
|
sdev->host->hostt->slave_destroy(sdev);
|
|
transport_destroy_device(dev);
|
|
|
|
/*
|
|
* Paired with the kref_get() in scsi_sysfs_initialize(). We have
|
|
* remoed sysfs visibility from the device, so make the target
|
|
* invisible if this was the last device underneath it.
|
|
*/
|
|
scsi_target_reap(scsi_target(sdev));
|
|
|
|
put_device(dev);
|
|
}
|
|
|
|
/**
|
|
* scsi_remove_device - unregister a device from the scsi bus
|
|
* @sdev: scsi_device to unregister
|
|
**/
|
|
void scsi_remove_device(struct scsi_device *sdev)
|
|
{
|
|
struct Scsi_Host *shost = sdev->host;
|
|
|
|
mutex_lock(&shost->scan_mutex);
|
|
__scsi_remove_device(sdev);
|
|
mutex_unlock(&shost->scan_mutex);
|
|
}
|
|
EXPORT_SYMBOL(scsi_remove_device);
|
|
|
|
static void __scsi_remove_target(struct scsi_target *starget)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
unsigned long flags;
|
|
struct scsi_device *sdev;
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
restart:
|
|
list_for_each_entry(sdev, &shost->__devices, siblings) {
|
|
if (sdev->channel != starget->channel ||
|
|
sdev->id != starget->id ||
|
|
scsi_device_get(sdev))
|
|
continue;
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
scsi_remove_device(sdev);
|
|
scsi_device_put(sdev);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
goto restart;
|
|
}
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* scsi_remove_target - try to remove a target and all its devices
|
|
* @dev: generic starget or parent of generic stargets to be removed
|
|
*
|
|
* Note: This is slightly racy. It is possible that if the user
|
|
* requests the addition of another device then the target won't be
|
|
* removed.
|
|
*/
|
|
void scsi_remove_target(struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(dev->parent);
|
|
struct scsi_target *starget, *last = NULL;
|
|
unsigned long flags;
|
|
|
|
/* remove targets being careful to lookup next entry before
|
|
* deleting the last
|
|
*/
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
list_for_each_entry(starget, &shost->__targets, siblings) {
|
|
if (starget->state == STARGET_DEL)
|
|
continue;
|
|
if (starget->dev.parent == dev || &starget->dev == dev) {
|
|
/* assuming new targets arrive at the end */
|
|
kref_get(&starget->reap_ref);
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
if (last)
|
|
scsi_target_reap(last);
|
|
last = starget;
|
|
__scsi_remove_target(starget);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
|
|
if (last)
|
|
scsi_target_reap(last);
|
|
}
|
|
EXPORT_SYMBOL(scsi_remove_target);
|
|
|
|
int scsi_register_driver(struct device_driver *drv)
|
|
{
|
|
drv->bus = &scsi_bus_type;
|
|
|
|
return driver_register(drv);
|
|
}
|
|
EXPORT_SYMBOL(scsi_register_driver);
|
|
|
|
int scsi_register_interface(struct class_interface *intf)
|
|
{
|
|
intf->class = &sdev_class;
|
|
|
|
return class_interface_register(intf);
|
|
}
|
|
EXPORT_SYMBOL(scsi_register_interface);
|
|
|
|
/**
|
|
* scsi_sysfs_add_host - add scsi host to subsystem
|
|
* @shost: scsi host struct to add to subsystem
|
|
**/
|
|
int scsi_sysfs_add_host(struct Scsi_Host *shost)
|
|
{
|
|
int error, i;
|
|
|
|
/* add host specific attributes */
|
|
if (shost->hostt->shost_attrs) {
|
|
for (i = 0; shost->hostt->shost_attrs[i]; i++) {
|
|
error = device_create_file(&shost->shost_dev,
|
|
shost->hostt->shost_attrs[i]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
}
|
|
|
|
transport_register_device(&shost->shost_gendev);
|
|
transport_configure_device(&shost->shost_gendev);
|
|
return 0;
|
|
}
|
|
|
|
static struct device_type scsi_dev_type = {
|
|
.name = "scsi_device",
|
|
.release = scsi_device_dev_release,
|
|
.groups = scsi_sdev_attr_groups,
|
|
};
|
|
|
|
void scsi_sysfs_device_initialize(struct scsi_device *sdev)
|
|
{
|
|
unsigned long flags;
|
|
struct Scsi_Host *shost = sdev->host;
|
|
struct scsi_target *starget = sdev->sdev_target;
|
|
|
|
device_initialize(&sdev->sdev_gendev);
|
|
sdev->sdev_gendev.bus = &scsi_bus_type;
|
|
sdev->sdev_gendev.type = &scsi_dev_type;
|
|
dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu",
|
|
sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
|
|
|
|
device_initialize(&sdev->sdev_dev);
|
|
sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
|
|
sdev->sdev_dev.class = &sdev_class;
|
|
dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu",
|
|
sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
|
|
/*
|
|
* Get a default scsi_level from the target (derived from sibling
|
|
* devices). This is the best we can do for guessing how to set
|
|
* sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the
|
|
* setting doesn't matter, because all the bits are zero anyway.
|
|
* But it does matter for higher LUNs.
|
|
*/
|
|
sdev->scsi_level = starget->scsi_level;
|
|
if (sdev->scsi_level <= SCSI_2 &&
|
|
sdev->scsi_level != SCSI_UNKNOWN &&
|
|
!shost->no_scsi2_lun_in_cdb)
|
|
sdev->lun_in_cdb = 1;
|
|
|
|
transport_setup_device(&sdev->sdev_gendev);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
list_add_tail(&sdev->same_target_siblings, &starget->devices);
|
|
list_add_tail(&sdev->siblings, &shost->__devices);
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
/*
|
|
* device can now only be removed via __scsi_remove_device() so hold
|
|
* the target. Target will be held in CREATED state until something
|
|
* beneath it becomes visible (in which case it moves to RUNNING)
|
|
*/
|
|
kref_get(&starget->reap_ref);
|
|
}
|
|
|
|
int scsi_is_sdev_device(const struct device *dev)
|
|
{
|
|
return dev->type == &scsi_dev_type;
|
|
}
|
|
EXPORT_SYMBOL(scsi_is_sdev_device);
|
|
|
|
/* A blank transport template that is used in drivers that don't
|
|
* yet implement Transport Attributes */
|
|
struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };
|