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scsi: ipr: Add asynchronous error notification
This patch implements functions for pushing HCAM (host controlled asynchronous messages) error buffers to userspace through sysfs attributes. Reads to the "async_err_log" attribute will result in a single HCAM buffer being copied to userspace; one can process the next HCAM buffer by writing any string to the same attribute. A new list was added to the ioa_cfg structure to store the HCAM buffers for later reporting. We also send a KOBJ_CHANGE event whenever a new HCAM buffer is made available to userspace. Signed-off-by: Heitor Ricardo Alves de Siqueira <halves@linux.vnet.ibm.com> Signed-off-by: Gabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Brian King
Martin K. Petersen
parent
6328d9030f
commit
afc3f83cb4
@ -1473,7 +1473,7 @@ static void ipr_process_ccn(struct ipr_cmnd *ipr_cmd)
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struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
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u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
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list_del(&hostrcb->queue);
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list_del_init(&hostrcb->queue);
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list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
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if (ioasc) {
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@ -2552,6 +2552,23 @@ static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
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}
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}
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static struct ipr_hostrcb *ipr_get_free_hostrcb(struct ipr_ioa_cfg *ioa)
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{
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struct ipr_hostrcb *hostrcb;
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hostrcb = list_first_entry_or_null(&ioa->hostrcb_free_q,
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struct ipr_hostrcb, queue);
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if (unlikely(!hostrcb)) {
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dev_info(&ioa->pdev->dev, "Reclaiming async error buffers.");
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hostrcb = list_first_entry_or_null(&ioa->hostrcb_report_q,
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struct ipr_hostrcb, queue);
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}
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list_del_init(&hostrcb->queue);
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return hostrcb;
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}
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/**
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* ipr_process_error - Op done function for an adapter error log.
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* @ipr_cmd: ipr command struct
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@ -2569,13 +2586,14 @@ static void ipr_process_error(struct ipr_cmnd *ipr_cmd)
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struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
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u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
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u32 fd_ioasc;
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char *envp[] = { "ASYNC_ERR_LOG=1", NULL };
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if (ioa_cfg->sis64)
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fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
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else
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fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
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list_del(&hostrcb->queue);
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list_del_init(&hostrcb->queue);
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list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
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if (!ioasc) {
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@ -2588,6 +2606,10 @@ static void ipr_process_error(struct ipr_cmnd *ipr_cmd)
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"Host RCB failed with IOASC: 0x%08X\n", ioasc);
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}
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list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_report_q);
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hostrcb = ipr_get_free_hostrcb(ioa_cfg);
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kobject_uevent_env(&ioa_cfg->host->shost_dev.kobj, KOBJ_CHANGE, envp);
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ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
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}
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@ -4095,6 +4117,64 @@ static struct device_attribute ipr_ioa_fw_type_attr = {
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.show = ipr_show_fw_type
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};
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static ssize_t ipr_read_async_err_log(struct file *filep, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf,
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loff_t off, size_t count)
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{
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struct device *cdev = container_of(kobj, struct device, kobj);
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struct Scsi_Host *shost = class_to_shost(cdev);
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struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
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struct ipr_hostrcb *hostrcb;
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unsigned long lock_flags = 0;
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int ret;
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spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
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hostrcb = list_first_entry_or_null(&ioa_cfg->hostrcb_report_q,
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struct ipr_hostrcb, queue);
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if (!hostrcb) {
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spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
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return 0;
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}
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ret = memory_read_from_buffer(buf, count, &off, &hostrcb->hcam,
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sizeof(hostrcb->hcam));
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spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
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return ret;
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}
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static ssize_t ipr_next_async_err_log(struct file *filep, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf,
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loff_t off, size_t count)
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{
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struct device *cdev = container_of(kobj, struct device, kobj);
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struct Scsi_Host *shost = class_to_shost(cdev);
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struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
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struct ipr_hostrcb *hostrcb;
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unsigned long lock_flags = 0;
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spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
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hostrcb = list_first_entry_or_null(&ioa_cfg->hostrcb_report_q,
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struct ipr_hostrcb, queue);
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if (!hostrcb) {
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spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
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return count;
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}
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/* Reclaim hostrcb before exit */
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list_move_tail(&hostrcb->queue, &ioa_cfg->hostrcb_free_q);
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spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
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return count;
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}
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static struct bin_attribute ipr_ioa_async_err_log = {
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.attr = {
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.name = "async_err_log",
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.mode = S_IRUGO | S_IWUSR,
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},
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.size = 0,
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.read = ipr_read_async_err_log,
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.write = ipr_next_async_err_log
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};
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static struct device_attribute *ipr_ioa_attrs[] = {
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&ipr_fw_version_attr,
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&ipr_log_level_attr,
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@ -7026,8 +7106,7 @@ static int ipr_ioa_reset_done(struct ipr_cmnd *ipr_cmd)
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{
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struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
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struct ipr_resource_entry *res;
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struct ipr_hostrcb *hostrcb, *temp;
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int i = 0, j;
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int j;
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ENTER;
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ioa_cfg->in_reset_reload = 0;
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@ -7048,12 +7127,16 @@ static int ipr_ioa_reset_done(struct ipr_cmnd *ipr_cmd)
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}
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schedule_work(&ioa_cfg->work_q);
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list_for_each_entry_safe(hostrcb, temp, &ioa_cfg->hostrcb_free_q, queue) {
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list_del(&hostrcb->queue);
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if (i++ < IPR_NUM_LOG_HCAMS)
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ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
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for (j = 0; j < IPR_NUM_HCAMS; j++) {
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list_del_init(&ioa_cfg->hostrcb[j]->queue);
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if (j < IPR_NUM_LOG_HCAMS)
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ipr_send_hcam(ioa_cfg,
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IPR_HCAM_CDB_OP_CODE_LOG_DATA,
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ioa_cfg->hostrcb[j]);
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else
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ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
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ipr_send_hcam(ioa_cfg,
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IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE,
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ioa_cfg->hostrcb[j]);
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}
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scsi_report_bus_reset(ioa_cfg->host, IPR_VSET_BUS);
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@ -8335,7 +8418,7 @@ static void ipr_get_unit_check_buffer(struct ipr_ioa_cfg *ioa_cfg)
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hostrcb = list_entry(ioa_cfg->hostrcb_free_q.next,
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struct ipr_hostrcb, queue);
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list_del(&hostrcb->queue);
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list_del_init(&hostrcb->queue);
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memset(&hostrcb->hcam, 0, sizeof(hostrcb->hcam));
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rc = ipr_get_ldump_data_section(ioa_cfg,
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@ -9332,7 +9415,7 @@ static void ipr_free_mem(struct ipr_ioa_cfg *ioa_cfg)
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dma_free_coherent(&ioa_cfg->pdev->dev, ioa_cfg->cfg_table_size,
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ioa_cfg->u.cfg_table, ioa_cfg->cfg_table_dma);
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for (i = 0; i < IPR_NUM_HCAMS; i++) {
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for (i = 0; i < IPR_MAX_HCAMS; i++) {
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dma_free_coherent(&ioa_cfg->pdev->dev,
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sizeof(struct ipr_hostrcb),
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ioa_cfg->hostrcb[i],
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@ -9572,7 +9655,7 @@ static int ipr_alloc_mem(struct ipr_ioa_cfg *ioa_cfg)
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if (!ioa_cfg->u.cfg_table)
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goto out_free_host_rrq;
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for (i = 0; i < IPR_NUM_HCAMS; i++) {
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for (i = 0; i < IPR_MAX_HCAMS; i++) {
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ioa_cfg->hostrcb[i] = dma_alloc_coherent(&pdev->dev,
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sizeof(struct ipr_hostrcb),
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&ioa_cfg->hostrcb_dma[i],
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@ -9714,6 +9797,7 @@ static void ipr_init_ioa_cfg(struct ipr_ioa_cfg *ioa_cfg,
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INIT_LIST_HEAD(&ioa_cfg->hostrcb_free_q);
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INIT_LIST_HEAD(&ioa_cfg->hostrcb_pending_q);
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INIT_LIST_HEAD(&ioa_cfg->hostrcb_report_q);
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INIT_LIST_HEAD(&ioa_cfg->free_res_q);
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INIT_LIST_HEAD(&ioa_cfg->used_res_q);
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INIT_WORK(&ioa_cfg->work_q, ipr_worker_thread);
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@ -10352,6 +10436,8 @@ static void ipr_remove(struct pci_dev *pdev)
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&ipr_trace_attr);
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ipr_remove_dump_file(&ioa_cfg->host->shost_dev.kobj,
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&ipr_dump_attr);
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sysfs_remove_bin_file(&ioa_cfg->host->shost_dev.kobj,
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&ipr_ioa_async_err_log);
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scsi_remove_host(ioa_cfg->host);
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__ipr_remove(pdev);
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@ -10400,10 +10486,25 @@ static int ipr_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
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return rc;
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}
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rc = sysfs_create_bin_file(&ioa_cfg->host->shost_dev.kobj,
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&ipr_ioa_async_err_log);
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if (rc) {
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ipr_remove_dump_file(&ioa_cfg->host->shost_dev.kobj,
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&ipr_dump_attr);
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ipr_remove_trace_file(&ioa_cfg->host->shost_dev.kobj,
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&ipr_trace_attr);
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scsi_remove_host(ioa_cfg->host);
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__ipr_remove(pdev);
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return rc;
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}
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rc = ipr_create_dump_file(&ioa_cfg->host->shost_dev.kobj,
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&ipr_dump_attr);
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if (rc) {
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sysfs_remove_bin_file(&ioa_cfg->host->shost_dev.kobj,
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&ipr_ioa_async_err_log);
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ipr_remove_trace_file(&ioa_cfg->host->shost_dev.kobj,
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&ipr_trace_attr);
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scsi_remove_host(ioa_cfg->host);
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@ -154,7 +154,9 @@
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#define IPR_DEFAULT_MAX_ERROR_DUMP 984
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#define IPR_NUM_LOG_HCAMS 2
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#define IPR_NUM_CFG_CHG_HCAMS 2
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#define IPR_NUM_HCAM_QUEUE 12
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#define IPR_NUM_HCAMS (IPR_NUM_LOG_HCAMS + IPR_NUM_CFG_CHG_HCAMS)
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#define IPR_MAX_HCAMS (IPR_NUM_HCAMS + IPR_NUM_HCAM_QUEUE)
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#define IPR_MAX_SIS64_TARGETS_PER_BUS 1024
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#define IPR_MAX_SIS64_LUNS_PER_TARGET 0xffffffff
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@ -1532,10 +1534,11 @@ struct ipr_ioa_cfg {
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char ipr_hcam_label[8];
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#define IPR_HCAM_LABEL "hcams"
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struct ipr_hostrcb *hostrcb[IPR_NUM_HCAMS];
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dma_addr_t hostrcb_dma[IPR_NUM_HCAMS];
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struct ipr_hostrcb *hostrcb[IPR_MAX_HCAMS];
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dma_addr_t hostrcb_dma[IPR_MAX_HCAMS];
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struct list_head hostrcb_free_q;
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struct list_head hostrcb_pending_q;
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struct list_head hostrcb_report_q;
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struct ipr_hrr_queue hrrq[IPR_MAX_HRRQ_NUM];
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u32 hrrq_num;
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