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authorbrking@us.ibm.com <brking@us.ibm.com>2005-11-01 18:01:40 -0500
committerJames Bottomley <jejb@mulgrave.(none)>2005-11-06 14:05:07 -0500
commitf37eb54b48159f7384ad0e7e70e0f67d1317aac7 (patch)
treebad041cbe13f1adbcf659f439ac8b88cd90a3c66
parentd3c74871bdcb9cb09dca22994dfee8500515f28f (diff)
[SCSI] ipr: Provide reset_adapter retry method for offlined adapters
If an ipr adapter repeatedly fails its initialization the ipr driver will take the adapter offline and never talk to it again. This provides a method for the user to manually try the initialization again through sysfs. Signed-off-by: Brian King <brking@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
-rw-r--r--drivers/scsi/ipr.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 1d440f2763ca..eae61d994b90 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -2180,6 +2180,74 @@ static struct class_device_attribute ipr_diagnostics_attr = {
2180}; 2180};
2181 2181
2182/** 2182/**
2183 * ipr_show_adapter_state - Show the adapter's state
2184 * @class_dev: class device struct
2185 * @buf: buffer
2186 *
2187 * Return value:
2188 * number of bytes printed to buffer
2189 **/
2190static ssize_t ipr_show_adapter_state(struct class_device *class_dev, char *buf)
2191{
2192 struct Scsi_Host *shost = class_to_shost(class_dev);
2193 struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2194 unsigned long lock_flags = 0;
2195 int len;
2196
2197 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2198 if (ioa_cfg->ioa_is_dead)
2199 len = snprintf(buf, PAGE_SIZE, "offline\n");
2200 else
2201 len = snprintf(buf, PAGE_SIZE, "online\n");
2202 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2203 return len;
2204}
2205
2206/**
2207 * ipr_store_adapter_state - Change adapter state
2208 * @class_dev: class_device struct
2209 * @buf: buffer
2210 * @count: buffer size
2211 *
2212 * This function will change the adapter's state.
2213 *
2214 * Return value:
2215 * count on success / other on failure
2216 **/
2217static ssize_t ipr_store_adapter_state(struct class_device *class_dev,
2218 const char *buf, size_t count)
2219{
2220 struct Scsi_Host *shost = class_to_shost(class_dev);
2221 struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
2222 unsigned long lock_flags;
2223 int result = count;
2224
2225 if (!capable(CAP_SYS_ADMIN))
2226 return -EACCES;
2227
2228 spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2229 if (ioa_cfg->ioa_is_dead && !strncmp(buf, "online", 6)) {
2230 ioa_cfg->ioa_is_dead = 0;
2231 ioa_cfg->reset_retries = 0;
2232 ioa_cfg->in_ioa_bringdown = 0;
2233 ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2234 }
2235 spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2236 wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
2237
2238 return result;
2239}
2240
2241static struct class_device_attribute ipr_ioa_state_attr = {
2242 .attr = {
2243 .name = "state",
2244 .mode = S_IRUGO | S_IWUSR,
2245 },
2246 .show = ipr_show_adapter_state,
2247 .store = ipr_store_adapter_state
2248};
2249
2250/**
2183 * ipr_store_reset_adapter - Reset the adapter 2251 * ipr_store_reset_adapter - Reset the adapter
2184 * @class_dev: class_device struct 2252 * @class_dev: class_device struct
2185 * @buf: buffer 2253 * @buf: buffer
@@ -2515,6 +2583,7 @@ static struct class_device_attribute *ipr_ioa_attrs[] = {
2515 &ipr_fw_version_attr, 2583 &ipr_fw_version_attr,
2516 &ipr_log_level_attr, 2584 &ipr_log_level_attr,
2517 &ipr_diagnostics_attr, 2585 &ipr_diagnostics_attr,
2586 &ipr_ioa_state_attr,
2518 &ipr_ioa_reset_attr, 2587 &ipr_ioa_reset_attr,
2519 &ipr_update_fw_attr, 2588 &ipr_update_fw_attr,
2520 &ipr_ioa_cache_attr, 2589 &ipr_ioa_cache_attr,