diff options
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_base.c | 39 | ||||
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_fusion.c | 28 |
2 files changed, 49 insertions, 18 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index d99390cf5963..d0f4075fe36e 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -220,6 +220,28 @@ megasas_free_ctrl_dma_buffers(struct megasas_instance *instance); static inline void megasas_init_ctrl_params(struct megasas_instance *instance); +u32 megasas_readl(struct megasas_instance *instance, + const volatile void __iomem *addr) +{ + u32 i = 0, ret_val; + /* + * Due to a HW errata in Aero controllers, reads to certain + * Fusion registers could intermittently return all zeroes. + * This behavior is transient in nature and subsequent reads will + * return valid value. As a workaround in driver, retry readl for + * upto three times until a non-zero value is read. + */ + if (instance->adapter_type == AERO_SERIES) { + do { + ret_val = readl(addr); + i++; + } while (ret_val == 0 && i < 3); + return ret_val; + } else { + return readl(addr); + } +} + /** * megasas_set_dma_settings - Populate DMA address, length and flags for DCMDs * @instance: Adapter soft state @@ -3842,7 +3864,8 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr) if (instance->adapter_type != MFI_SERIES) { for (i = 0; i < (10 * 1000); i += 20) { - if (readl( + if (megasas_readl( + instance, &instance-> reg_set-> doorbell) & 1) @@ -5401,7 +5424,8 @@ static int megasas_init_fw(struct megasas_instance *instance) if (instance->adapter_type >= VENTURA_SERIES) { scratch_pad_2 = - readl(&instance->reg_set->outbound_scratch_pad_2); + megasas_readl(instance, + &instance->reg_set->outbound_scratch_pad_2); instance->max_raid_mapsize = ((scratch_pad_2 >> MR_MAX_RAID_MAP_SIZE_OFFSET_SHIFT) & MR_MAX_RAID_MAP_SIZE_MASK); @@ -5413,8 +5437,8 @@ static int megasas_init_fw(struct megasas_instance *instance) if (msix_enable && !msix_disable) { int irq_flags = PCI_IRQ_MSIX; - scratch_pad_1 = readl - (&instance->reg_set->outbound_scratch_pad_1); + scratch_pad_1 = megasas_readl + (instance, &instance->reg_set->outbound_scratch_pad_1); /* Check max MSI-X vectors */ if (fusion) { if (instance->adapter_type == THUNDERBOLT_SERIES) { @@ -5525,7 +5549,8 @@ static int megasas_init_fw(struct megasas_instance *instance) if (instance->adapter_type >= VENTURA_SERIES) { scratch_pad_3 = - readl(&instance->reg_set->outbound_scratch_pad_3); + megasas_readl(instance, + &instance->reg_set->outbound_scratch_pad_3); if ((scratch_pad_3 & MR_NVME_PAGE_SIZE_MASK) >= MR_DEFAULT_NVME_PAGE_SHIFT) instance->nvme_page_size = @@ -6193,8 +6218,8 @@ megasas_set_dma_mask(struct megasas_instance *instance) * If 32 bit DMA mask fails, then try for 64 bit mask * for FW capable of handling 64 bit DMA. */ - scratch_pad_1 = readl - (&instance->reg_set->outbound_scratch_pad_1); + scratch_pad_1 = megasas_readl + (instance, &instance->reg_set->outbound_scratch_pad_1); if (!(scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET)) goto fail_set_dma_mask; diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index e4c3edc73099..50e2ed865041 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -95,6 +95,8 @@ static void megasas_free_reply_fusion(struct megasas_instance *instance); static inline void megasas_configure_queue_sizes(struct megasas_instance *instance); static void megasas_fusion_crash_dump(struct megasas_instance *instance); +extern u32 megasas_readl(struct megasas_instance *instance, + const volatile void __iomem *addr); /** * megasas_check_same_4gb_region - check if allocation @@ -267,7 +269,8 @@ megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_c /* ventura FW does not fill outbound_scratch_pad_2 with queue depth */ if (instance->adapter_type < VENTURA_SERIES) cur_max_fw_cmds = - readl(&instance->reg_set->outbound_scratch_pad_2) & 0x00FFFF; + megasas_readl(instance, + &instance->reg_set->outbound_scratch_pad_2) & 0x00FFFF; if (dual_qdepth_disable || !cur_max_fw_cmds) cur_max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF; @@ -984,8 +987,8 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) cmd = fusion->ioc_init_cmd; - scratch_pad_1 = readl - (&instance->reg_set->outbound_scratch_pad_1); + scratch_pad_1 = megasas_readl + (instance, &instance->reg_set->outbound_scratch_pad_1); cur_rdpq_mode = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ? 1 : 0; @@ -1104,7 +1107,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) instance->instancet->disable_intr(instance); for (i = 0; i < (10 * 1000); i += 20) { - if (readl(&instance->reg_set->doorbell) & 1) + if (megasas_readl(instance, &instance->reg_set->doorbell) & 1) msleep(20); else break; @@ -1653,7 +1656,8 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) megasas_configure_queue_sizes(instance); - scratch_pad_1 = readl(&instance->reg_set->outbound_scratch_pad_1); + scratch_pad_1 = megasas_readl(instance, + &instance->reg_set->outbound_scratch_pad_1); /* If scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK is set, * Firmware support extended IO chain frame which is 4 times more than * legacy Firmware. @@ -3731,7 +3735,7 @@ megasas_release_fusion(struct megasas_instance *instance) static u32 megasas_read_fw_status_reg_fusion(struct megasas_instance *instance) { - return readl(&instance->reg_set->outbound_scratch_pad_0); + return megasas_readl(instance, &instance->reg_set->outbound_scratch_pad_0); } /** @@ -3793,11 +3797,12 @@ megasas_adp_reset_fusion(struct megasas_instance *instance, writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); /* Check that the diag write enable (DRWE) bit is on */ - host_diag = readl(&instance->reg_set->fusion_host_diag); + host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag); retry = 0; while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) { msleep(100); - host_diag = readl(&instance->reg_set->fusion_host_diag); + host_diag = megasas_readl(instance, + &instance->reg_set->fusion_host_diag); if (retry++ == 100) { dev_warn(&instance->pdev->dev, "Host diag unlock failed from %s %d\n", @@ -3814,11 +3819,12 @@ megasas_adp_reset_fusion(struct megasas_instance *instance, msleep(3000); /* Make sure reset adapter bit is cleared */ - host_diag = readl(&instance->reg_set->fusion_host_diag); + host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag); retry = 0; while (host_diag & HOST_DIAG_RESET_ADAPTER) { msleep(100); - host_diag = readl(&instance->reg_set->fusion_host_diag); + host_diag = megasas_readl(instance, + &instance->reg_set->fusion_host_diag); if (retry++ == 1000) { dev_warn(&instance->pdev->dev, "Diag reset adapter never cleared %s %d\n", @@ -4607,7 +4613,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int reason) dev_info(&instance->pdev->dev, "IO/DCMD timeout is detected, " "forcibly FAULT Firmware\n"); atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT); - status_reg = readl(&instance->reg_set->doorbell); + status_reg = megasas_readl(instance, &instance->reg_set->doorbell); writel(status_reg | MFI_STATE_FORCE_OCR, &instance->reg_set->doorbell); readl(&instance->reg_set->doorbell); |