mirror of https://gitee.com/openkylin/linux.git
megaraid_sas: Do not allow PCI access during OCR
This patch will do synhronization between OCR function and AEN function using "reset_mutex" lock. reset_mutex will be acquired only in the first half of the AEN function which issues a DCMD. Second half of the function which calls SCSI API (scsi_add_device/scsi_remove_device) should be out of reset_mutex to avoid deadlock between scsi_eh thread and driver. During chip reset (inside OCR function), there should not be any PCI access and AEN function (which is called in delayed context) may be firing DCMDs (doing PCI writes) when chip reset is happening in parallel which will cause FW fault. This patch will solve the problem by making AEN thread and OCR thread mutually exclusive. Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com> Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sumit Saxena
Martin K. Petersen
parent
3846470a1b
commit
11c71cb4ab
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@ -1083,6 +1083,8 @@ struct megasas_ctrl_info {
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#define VD_EXT_DEBUG 0
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#define VD_EXT_DEBUG 0
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#define SCAN_PD_CHANNEL 0x1
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#define SCAN_VD_CHANNEL 0x2
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enum MR_SCSI_CMD_TYPE {
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enum MR_SCSI_CMD_TYPE {
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READ_WRITE_LDIO = 0,
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READ_WRITE_LDIO = 0,
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@ -5476,7 +5476,6 @@ static int megasas_probe_one(struct pci_dev *pdev,
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spin_lock_init(&instance->hba_lock);
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spin_lock_init(&instance->hba_lock);
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spin_lock_init(&instance->completion_lock);
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spin_lock_init(&instance->completion_lock);
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mutex_init(&instance->aen_mutex);
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mutex_init(&instance->reset_mutex);
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mutex_init(&instance->reset_mutex);
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/*
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/*
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@ -6442,10 +6441,10 @@ static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
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}
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}
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spin_unlock_irqrestore(&instance->hba_lock, flags);
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spin_unlock_irqrestore(&instance->hba_lock, flags);
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mutex_lock(&instance->aen_mutex);
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mutex_lock(&instance->reset_mutex);
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error = megasas_register_aen(instance, aen.seq_num,
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error = megasas_register_aen(instance, aen.seq_num,
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aen.class_locale_word);
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aen.class_locale_word);
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mutex_unlock(&instance->aen_mutex);
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mutex_unlock(&instance->reset_mutex);
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return error;
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return error;
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}
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}
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@ -6647,6 +6646,7 @@ megasas_aen_polling(struct work_struct *work)
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int i, j, doscan = 0;
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int i, j, doscan = 0;
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u32 seq_num, wait_time = MEGASAS_RESET_WAIT_TIME;
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u32 seq_num, wait_time = MEGASAS_RESET_WAIT_TIME;
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int error;
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int error;
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u8 dcmd_ret = 0;
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if (!instance) {
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if (!instance) {
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printk(KERN_ERR "invalid instance!\n");
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printk(KERN_ERR "invalid instance!\n");
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@ -6659,16 +6659,7 @@ megasas_aen_polling(struct work_struct *work)
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wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
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wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
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/* Don't run the event workqueue thread if OCR is running */
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/* Don't run the event workqueue thread if OCR is running */
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for (i = 0; i < wait_time; i++) {
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mutex_lock(&instance->reset_mutex);
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if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL)
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break;
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if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
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dev_notice(&instance->pdev->dev, "%s waiting for "
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"controller reset to finish for scsi%d\n",
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__func__, instance->host->host_no);
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}
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msleep(1000);
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}
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instance->ev = NULL;
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instance->ev = NULL;
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host = instance->host;
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host = instance->host;
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@ -6676,47 +6667,73 @@ megasas_aen_polling(struct work_struct *work)
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megasas_decode_evt(instance);
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megasas_decode_evt(instance);
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switch (le32_to_cpu(instance->evt_detail->code)) {
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switch (le32_to_cpu(instance->evt_detail->code)) {
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case MR_EVT_PD_INSERTED:
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case MR_EVT_PD_INSERTED:
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if (megasas_get_pd_list(instance) == 0) {
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case MR_EVT_PD_REMOVED:
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for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
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dcmd_ret = megasas_get_pd_list(instance);
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for (j = 0;
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if (dcmd_ret == 0)
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j < MEGASAS_MAX_DEV_PER_CHANNEL;
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doscan = SCAN_PD_CHANNEL;
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j++) {
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pd_index =
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(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
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sdev1 = scsi_device_lookup(host, i, j, 0);
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if (instance->pd_list[pd_index].driveState
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== MR_PD_STATE_SYSTEM) {
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if (!sdev1)
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scsi_add_device(host, i, j, 0);
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if (sdev1)
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scsi_device_put(sdev1);
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}
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}
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}
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}
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doscan = 0;
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break;
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break;
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case MR_EVT_PD_REMOVED:
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case MR_EVT_LD_OFFLINE:
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if (megasas_get_pd_list(instance) == 0) {
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case MR_EVT_CFG_CLEARED:
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for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
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case MR_EVT_LD_DELETED:
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for (j = 0;
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case MR_EVT_LD_CREATED:
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j < MEGASAS_MAX_DEV_PER_CHANNEL;
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if (!instance->requestorId ||
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j++) {
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(instance->requestorId && megasas_get_ld_vf_affiliation(instance, 0)))
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dcmd_ret = megasas_ld_list_query(instance, MR_LD_QUERY_TYPE_EXPOSED_TO_HOST);
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pd_index =
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if (dcmd_ret == 0)
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(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
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doscan = SCAN_VD_CHANNEL;
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break;
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case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
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case MR_EVT_FOREIGN_CFG_IMPORTED:
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case MR_EVT_LD_STATE_CHANGE:
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dcmd_ret = megasas_get_pd_list(instance);
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if (dcmd_ret != 0)
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break;
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if (!instance->requestorId ||
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(instance->requestorId && megasas_get_ld_vf_affiliation(instance, 0)))
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dcmd_ret = megasas_ld_list_query(instance, MR_LD_QUERY_TYPE_EXPOSED_TO_HOST);
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if (dcmd_ret != 0)
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break;
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doscan = SCAN_VD_CHANNEL | SCAN_PD_CHANNEL;
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dev_info(&instance->pdev->dev, "scanning for scsi%d...\n",
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instance->host->host_no);
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break;
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case MR_EVT_CTRL_PROP_CHANGED:
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dcmd_ret = megasas_get_ctrl_info(instance);
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break;
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default:
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doscan = 0;
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break;
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}
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} else {
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dev_err(&instance->pdev->dev, "invalid evt_detail!\n");
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mutex_unlock(&instance->reset_mutex);
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kfree(ev);
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return;
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}
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mutex_unlock(&instance->reset_mutex);
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if (doscan & SCAN_PD_CHANNEL) {
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for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
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for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
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pd_index = i*MEGASAS_MAX_DEV_PER_CHANNEL + j;
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sdev1 = scsi_device_lookup(host, i, j, 0);
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sdev1 = scsi_device_lookup(host, i, j, 0);
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if (instance->pd_list[pd_index].driveState ==
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if (instance->pd_list[pd_index].driveState
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MR_PD_STATE_SYSTEM) {
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== MR_PD_STATE_SYSTEM) {
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if (!sdev1)
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if (sdev1)
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scsi_add_device(host, i, j, 0);
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else
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scsi_device_put(sdev1);
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scsi_device_put(sdev1);
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} else {
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} else {
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if (sdev1) {
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if (sdev1) {
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@ -6724,164 +6741,53 @@ megasas_aen_polling(struct work_struct *work)
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scsi_device_put(sdev1);
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scsi_device_put(sdev1);
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}
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}
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}
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}
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}
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}
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}
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}
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doscan = 0;
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break;
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case MR_EVT_LD_OFFLINE:
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case MR_EVT_CFG_CLEARED:
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case MR_EVT_LD_DELETED:
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if (!instance->requestorId ||
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megasas_get_ld_vf_affiliation(instance, 0)) {
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if (megasas_ld_list_query(instance,
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MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
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megasas_get_ld_list(instance);
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for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
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for (j = 0;
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j < MEGASAS_MAX_DEV_PER_CHANNEL;
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j++) {
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ld_index =
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(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
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sdev1 = scsi_device_lookup(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
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if (instance->ld_ids[ld_index]
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!= 0xff) {
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if (sdev1)
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scsi_device_put(sdev1);
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} else {
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if (sdev1) {
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scsi_remove_device(sdev1);
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scsi_device_put(sdev1);
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}
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}
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}
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}
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doscan = 0;
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}
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break;
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case MR_EVT_LD_CREATED:
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if (!instance->requestorId ||
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megasas_get_ld_vf_affiliation(instance, 0)) {
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if (megasas_ld_list_query(instance,
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MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
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megasas_get_ld_list(instance);
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for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
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for (j = 0;
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j < MEGASAS_MAX_DEV_PER_CHANNEL;
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j++) {
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ld_index =
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(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
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sdev1 = scsi_device_lookup(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
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if (instance->ld_ids[ld_index]
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!= 0xff) {
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if (!sdev1)
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scsi_add_device(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
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}
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if (sdev1)
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scsi_device_put(sdev1);
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}
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}
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doscan = 0;
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}
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break;
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case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
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case MR_EVT_FOREIGN_CFG_IMPORTED:
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case MR_EVT_LD_STATE_CHANGE:
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doscan = 1;
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break;
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case MR_EVT_CTRL_PROP_CHANGED:
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megasas_get_ctrl_info(instance);
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break;
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default:
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doscan = 0;
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break;
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}
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}
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} else {
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dev_err(&instance->pdev->dev, "invalid evt_detail!\n");
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kfree(ev);
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return;
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}
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}
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if (doscan) {
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if (doscan & SCAN_VD_CHANNEL) {
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dev_info(&instance->pdev->dev, "scanning for scsi%d...\n",
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for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
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instance->host->host_no);
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for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
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if (megasas_get_pd_list(instance) == 0) {
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ld_index = (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
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for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
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sdev1 = scsi_device_lookup(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
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for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
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if (instance->ld_ids[ld_index] != 0xff) {
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pd_index = i*MEGASAS_MAX_DEV_PER_CHANNEL + j;
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if (!sdev1)
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sdev1 = scsi_device_lookup(host, i, j, 0);
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scsi_add_device(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
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if (instance->pd_list[pd_index].driveState ==
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else
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MR_PD_STATE_SYSTEM) {
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scsi_device_put(sdev1);
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if (!sdev1) {
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} else {
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scsi_add_device(host, i, j, 0);
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if (sdev1) {
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}
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scsi_remove_device(sdev1);
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if (sdev1)
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scsi_device_put(sdev1);
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scsi_device_put(sdev1);
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} else {
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if (sdev1) {
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scsi_remove_device(sdev1);
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scsi_device_put(sdev1);
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}
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}
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}
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}
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}
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if (!instance->requestorId ||
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megasas_get_ld_vf_affiliation(instance, 0)) {
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if (megasas_ld_list_query(instance,
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MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
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megasas_get_ld_list(instance);
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for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
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for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL;
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j++) {
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ld_index =
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(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
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sdev1 = scsi_device_lookup(host,
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MEGASAS_MAX_PD_CHANNELS + i, j, 0);
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if (instance->ld_ids[ld_index]
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!= 0xff) {
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if (!sdev1)
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scsi_add_device(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
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else
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scsi_device_put(sdev1);
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} else {
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if (sdev1) {
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scsi_remove_device(sdev1);
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scsi_device_put(sdev1);
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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if (instance->aen_cmd != NULL) {
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if (dcmd_ret == 0)
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kfree(ev);
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seq_num = le32_to_cpu(instance->evt_detail->seq_num) + 1;
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return ;
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else
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}
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seq_num = instance->last_seq_num;
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seq_num = le32_to_cpu(instance->evt_detail->seq_num) + 1;
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/* Register AEN with FW for latest sequence number plus 1 */
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/* Register AEN with FW for latest sequence number plus 1 */
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class_locale.members.reserved = 0;
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class_locale.members.reserved = 0;
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class_locale.members.locale = MR_EVT_LOCALE_ALL;
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class_locale.members.locale = MR_EVT_LOCALE_ALL;
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class_locale.members.class = MR_EVT_CLASS_DEBUG;
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class_locale.members.class = MR_EVT_CLASS_DEBUG;
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mutex_lock(&instance->aen_mutex);
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if (instance->aen_cmd != NULL) {
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kfree(ev);
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return;
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}
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mutex_lock(&instance->reset_mutex);
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error = megasas_register_aen(instance, seq_num,
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error = megasas_register_aen(instance, seq_num,
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class_locale.word);
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class_locale.word);
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mutex_unlock(&instance->aen_mutex);
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if (error)
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if (error)
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dev_err(&instance->pdev->dev, "register aen failed error %x\n", error);
|
dev_err(&instance->pdev->dev,
|
||||||
|
"register aen failed error %x\n", error);
|
||||||
|
|
||||||
|
mutex_unlock(&instance->reset_mutex);
|
||||||
kfree(ev);
|
kfree(ev);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue