scsi: megaraid_sas: changes to function prototypes

Instead of the register address, pass the instance pointer to clear_intr
and read_fw_status_reg functions.  This is done in preparation for adding
adapter type based checks in these functions in later patches of this
series.

Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

3 files changed, 60 insertions, 59 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index 4064fae7e7ba..8bfe4c54e4ae 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -2413,9 +2413,9 @@ struct megasas_instance_template {
 	void (*enable_intr)(struct megasas_instance *);
 	void (*disable_intr)(struct megasas_instance *);
 
-	int (*clear_intr)(struct megasas_register_set __iomem *);
+	int (*clear_intr)(struct megasas_instance *);
 
-	u32 (*read_fw_status_reg)(struct megasas_register_set __iomem *);
+	u32 (*read_fw_status_reg)(struct megasas_instance *);
 	int (*adp_reset)(struct megasas_instance *, \
 		struct megasas_register_set __iomem *);
 	int (*check_reset)(struct megasas_instance *, \
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 3492ae990b64..d99390cf5963 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -190,7 +190,7 @@ void
 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
 		     u8 alt_status);
 static u32
-megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs);
+megasas_read_fw_status_reg_gen2(struct megasas_instance *instance);
 static int
 megasas_adp_reset_gen2(struct megasas_instance *instance,
 		       struct megasas_register_set __iomem *reg_set);
@@ -420,19 +420,21 @@ megasas_disable_intr_xscale(struct megasas_instance *instance)
  * @regs:			MFI register set
  */
 static u32
-megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
+megasas_read_fw_status_reg_xscale(struct megasas_instance *instance)
 {
-	return readl(&(regs)->outbound_msg_0);
+	return readl(&instance->reg_set->outbound_msg_0);
 }
 /**
  * megasas_clear_interrupt_xscale -	Check & clear interrupt
  * @regs:				MFI register set
  */
 static int
-megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
+megasas_clear_intr_xscale(struct megasas_instance *instance)
 {
 	u32 status;
 	u32 mfiStatus = 0;
+	struct megasas_register_set __iomem *regs;
+	regs = instance->reg_set;
 
 	/*
 	 * Check if it is our interrupt
@@ -597,9 +599,9 @@ megasas_disable_intr_ppc(struct megasas_instance *instance)
  * @regs:			MFI register set
  */
 static u32
-megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
+megasas_read_fw_status_reg_ppc(struct megasas_instance *instance)
 {
-	return readl(&(regs)->outbound_scratch_pad_0);
+	return readl(&instance->reg_set->outbound_scratch_pad_0);
 }
 
 /**
@@ -607,9 +609,11 @@ megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
  * @regs:				MFI register set
  */
 static int
-megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
+megasas_clear_intr_ppc(struct megasas_instance *instance)
 {
 	u32 status, mfiStatus = 0;
+	struct megasas_register_set __iomem *regs;
+	regs = instance->reg_set;
 
 	/*
 	 * Check if it is our interrupt
@@ -722,9 +726,9 @@ megasas_disable_intr_skinny(struct megasas_instance *instance)
  * @regs:			MFI register set
  */
 static u32
-megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
+megasas_read_fw_status_reg_skinny(struct megasas_instance *instance)
 {
-	return readl(&(regs)->outbound_scratch_pad_0);
+	return readl(&instance->reg_set->outbound_scratch_pad_0);
 }
 
 /**
@@ -732,10 +736,12 @@ megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
  * @regs:				MFI register set
  */
 static int
-megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
+megasas_clear_intr_skinny(struct megasas_instance *instance)
 {
 	u32 status;
 	u32 mfiStatus = 0;
+	struct megasas_register_set __iomem *regs;
+	regs = instance->reg_set;
 
 	/*
 	 * Check if it is our interrupt
@@ -749,7 +755,7 @@ megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
 	/*
 	 * Check if it is our interrupt
 	 */
-	if ((megasas_read_fw_status_reg_skinny(regs) & MFI_STATE_MASK) ==
+	if ((megasas_read_fw_status_reg_skinny(instance) & MFI_STATE_MASK) ==
 	    MFI_STATE_FAULT) {
 		mfiStatus = MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
 	} else
@@ -867,9 +873,9 @@ megasas_disable_intr_gen2(struct megasas_instance *instance)
  * @regs:                      MFI register set
  */
 static u32
-megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
+megasas_read_fw_status_reg_gen2(struct megasas_instance *instance)
 {
-	return readl(&(regs)->outbound_scratch_pad_0);
+	return readl(&instance->reg_set->outbound_scratch_pad_0);
 }
 
 /**
@@ -877,10 +883,12 @@ megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
  * @regs:                              MFI register set
  */
 static int
-megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
+megasas_clear_intr_gen2(struct megasas_instance *instance)
 {
 	u32 status;
 	u32 mfiStatus = 0;
+	struct megasas_register_set __iomem *regs;
+	regs = instance->reg_set;
 
 	/*
 	 * Check if it is our interrupt
@@ -2685,7 +2693,7 @@ static int megasas_wait_for_outstanding(struct megasas_instance *instance)
 
 	i = 0;
 	outstanding = atomic_read(&instance->fw_outstanding);
-	fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
+	fw_state = instance->instancet->read_fw_status_reg(instance) & MFI_STATE_MASK;
 
 	if ((!outstanding && (fw_state == MFI_STATE_OPERATIONAL)))
 		goto no_outstanding;
@@ -2714,7 +2722,7 @@ static int megasas_wait_for_outstanding(struct megasas_instance *instance)
 
 			outstanding = atomic_read(&instance->fw_outstanding);
 
-			fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
+			fw_state = instance->instancet->read_fw_status_reg(instance) & MFI_STATE_MASK;
 			if ((!outstanding && (fw_state == MFI_STATE_OPERATIONAL)))
 				goto no_outstanding;
 		}
@@ -3668,9 +3676,8 @@ megasas_deplete_reply_queue(struct megasas_instance *instance,
 		return IRQ_HANDLED;
 	}
 
-	if ((mfiStatus = instance->instancet->clear_intr(
-						instance->reg_set)
-						) == 0) {
+	mfiStatus = instance->instancet->clear_intr(instance);
+	if (mfiStatus == 0) {
 		/* Hardware may not set outbound_intr_status in MSI-X mode */
 		if (!instance->msix_vectors)
 			return IRQ_NONE;
@@ -3680,7 +3687,7 @@ megasas_deplete_reply_queue(struct megasas_instance *instance,
 
 	if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
 		fw_state = instance->instancet->read_fw_status_reg(
-				instance->reg_set) & MFI_STATE_MASK;
+				instance) & MFI_STATE_MASK;
 
 		if (fw_state != MFI_STATE_FAULT) {
 			dev_notice(&instance->pdev->dev, "fw state:%x\n",
@@ -3763,7 +3770,7 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
 	u32 cur_state;
 	u32 abs_state, curr_abs_state;
 
-	abs_state = instance->instancet->read_fw_status_reg(instance->reg_set);
+	abs_state = instance->instancet->read_fw_status_reg(instance);
 	fw_state = abs_state & MFI_STATE_MASK;
 
 	if (fw_state != MFI_STATE_READY)
@@ -3896,7 +3903,7 @@ megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
 		 */
 		for (i = 0; i < max_wait; i++) {
 			curr_abs_state = instance->instancet->
-				read_fw_status_reg(instance->reg_set);
+				read_fw_status_reg(instance);
 
 			if (abs_state == curr_abs_state) {
 				msleep(1000);
@@ -5032,16 +5039,13 @@ fail_fw_init:
 static u32
 megasas_init_adapter_mfi(struct megasas_instance *instance)
 {
-	struct megasas_register_set __iomem *reg_set;
 	u32 context_sz;
 	u32 reply_q_sz;
 
-	reg_set = instance->reg_set;
-
 	/*
 	 * Get various operational parameters from status register
 	 */
-	instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
+	instance->max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF;
 	/*
 	 * Reduce the max supported cmds by 1. This is to ensure that the
 	 * reply_q_sz (1 more than the max cmd that driver may send)
@@ -5049,7 +5053,7 @@ megasas_init_adapter_mfi(struct megasas_instance *instance)
 	 */
 	instance->max_fw_cmds = instance->max_fw_cmds-1;
 	instance->max_mfi_cmds = instance->max_fw_cmds;
-	instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
+	instance->max_num_sge = (instance->instancet->read_fw_status_reg(instance) & 0xFF0000) >>
 					0x10;
 	/*
 	 * For MFI skinny adapters, MEGASAS_SKINNY_INT_CMDS commands
@@ -5105,7 +5109,7 @@ megasas_init_adapter_mfi(struct megasas_instance *instance)
 
 	instance->fw_support_ieee = 0;
 	instance->fw_support_ieee =
-		(instance->instancet->read_fw_status_reg(reg_set) &
+		(instance->instancet->read_fw_status_reg(instance) &
 		0x04000000);
 
 	dev_notice(&instance->pdev->dev, "megasas_init_mfi: fw_support_ieee=%d",
@@ -5305,7 +5309,6 @@ static int megasas_init_fw(struct megasas_instance *instance)
 	u32 max_sectors_2, tmp_sectors, msix_enable;
 	u32 scratch_pad_1, scratch_pad_2, scratch_pad_3, status_reg;
 	resource_size_t base_addr;
-	struct megasas_register_set __iomem *reg_set;
 	struct megasas_ctrl_info *ctrl_info = NULL;
 	unsigned long bar_list;
 	int i, j, loop, fw_msix_count = 0;
@@ -5332,8 +5335,6 @@ static int megasas_init_fw(struct megasas_instance *instance)
 		goto fail_ioremap;
 	}
 
-	reg_set = instance->reg_set;
-
 	if (instance->adapter_type != MFI_SERIES)
 		instance->instancet = &megasas_instance_template_fusion;
 	else {
@@ -5362,7 +5363,7 @@ static int megasas_init_fw(struct megasas_instance *instance)
 	if (megasas_transition_to_ready(instance, 0)) {
 		if (instance->adapter_type >= INVADER_SERIES) {
 			status_reg = instance->instancet->read_fw_status_reg(
-					instance->reg_set);
+					instance);
 			do_adp_reset = status_reg & MFI_RESET_ADAPTER;
 		}
 
@@ -5407,7 +5408,7 @@ static int megasas_init_fw(struct megasas_instance *instance)
 	}
 
 	/* Check if MSI-X is supported while in ready state */
-	msix_enable = (instance->instancet->read_fw_status_reg(reg_set) &
+	msix_enable = (instance->instancet->read_fw_status_reg(instance) &
 		       0x4000000) >> 0x1a;
 	if (msix_enable && !msix_disable) {
 		int irq_flags = PCI_IRQ_MSIX;
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 765633cd182c..e4c3edc73099 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -73,7 +73,7 @@ void
 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
 int megasas_alloc_cmds(struct megasas_instance *instance);
 int
-megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs);
+megasas_clear_intr_fusion(struct megasas_instance *instance);
 int
 megasas_issue_polled(struct megasas_instance *instance,
 		     struct megasas_cmd *cmd);
@@ -165,9 +165,11 @@ megasas_disable_intr_fusion(struct megasas_instance *instance)
 }
 
 int
-megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
+megasas_clear_intr_fusion(struct megasas_instance *instance)
 {
 	u32 status;
+	struct megasas_register_set __iomem *regs;
+	regs = instance->reg_set;
 	/*
 	 * Check if it is our interrupt
 	 */
@@ -268,10 +270,10 @@ megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_c
 		readl(&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(reg_set) & 0x00FFFF;
+		cur_max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF;
 	else
 		ldio_threshold =
-			(instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF) - MEGASAS_FUSION_IOCTL_CMDS;
+			(instance->instancet->read_fw_status_reg(instance) & 0x00FFFF) - MEGASAS_FUSION_IOCTL_CMDS;
 
 	dev_info(&instance->pdev->dev,
 		 "Current firmware supports maximum commands: %d\t LDIO threshold: %d\n",
@@ -1764,12 +1766,12 @@ megasas_fault_detect_work(struct work_struct *work)
 	u32 fw_state, dma_state, status;
 
 	/* Check the fw state */
-	fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
+	fw_state = instance->instancet->read_fw_status_reg(instance) &
 			MFI_STATE_MASK;
 
 	if (fw_state == MFI_STATE_FAULT) {
-		dma_state = instance->instancet->read_fw_status_reg(
-				instance->reg_set) & MFI_STATE_DMADONE;
+		dma_state = instance->instancet->read_fw_status_reg(instance) &
+				MFI_STATE_DMADONE;
 		/* Start collecting crash, if DMA bit is done */
 		if (instance->crash_dump_drv_support &&
 		    instance->crash_dump_app_support && dma_state) {
@@ -3590,14 +3592,14 @@ irqreturn_t megasas_isr_fusion(int irq, void *devp)
 		return IRQ_NONE;
 
 	if (!instance->msix_vectors) {
-		mfiStatus = instance->instancet->clear_intr(instance->reg_set);
+		mfiStatus = instance->instancet->clear_intr(instance);
 		if (!mfiStatus)
 			return IRQ_NONE;
 	}
 
 	/* If we are resetting, bail */
 	if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
-		instance->instancet->clear_intr(instance->reg_set);
+		instance->instancet->clear_intr(instance);
 		return IRQ_HANDLED;
 	}
 
@@ -3727,9 +3729,9 @@ megasas_release_fusion(struct megasas_instance *instance)
  * @regs:			MFI register set
  */
 static u32
-megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
+megasas_read_fw_status_reg_fusion(struct megasas_instance *instance)
 {
-	return readl(&(regs)->outbound_scratch_pad_0);
+	return readl(&instance->reg_set->outbound_scratch_pad_0);
 }
 
 /**
@@ -3827,14 +3829,14 @@ megasas_adp_reset_fusion(struct megasas_instance *instance,
 	if (host_diag & HOST_DIAG_RESET_ADAPTER)
 		return -1;
 
-	abs_state = instance->instancet->read_fw_status_reg(instance->reg_set)
+	abs_state = instance->instancet->read_fw_status_reg(instance)
 			& MFI_STATE_MASK;
 	retry = 0;
 
 	while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) {
 		msleep(100);
 		abs_state = instance->instancet->
-			read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
+			read_fw_status_reg(instance) & MFI_STATE_MASK;
 	}
 	if (abs_state <= MFI_STATE_FW_INIT) {
 		dev_warn(&instance->pdev->dev,
@@ -3874,8 +3876,8 @@ static inline void megasas_trigger_snap_dump(struct megasas_instance *instance)
 	}
 
 	for (j = 0; j < instance->snapdump_wait_time; j++) {
-		fw_state = instance->instancet->read_fw_status_reg(
-			instance->reg_set) & MFI_STATE_MASK;
+		fw_state = instance->instancet->read_fw_status_reg(instance) &
+				MFI_STATE_MASK;
 		if (fw_state == MFI_STATE_FAULT) {
 			dev_err(&instance->pdev->dev,
 				"Found FW in FAULT state, after snap dump trigger\n");
@@ -3909,8 +3911,8 @@ int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
 
 	for (i = 0; i < waittime_for_io_completion; i++) {
 		/* Check if firmware is in fault state */
-		fw_state = instance->instancet->read_fw_status_reg(
-			instance->reg_set) & MFI_STATE_MASK;
+		fw_state = instance->instancet->read_fw_status_reg(instance) &
+				MFI_STATE_MASK;
 		if (fw_state == MFI_STATE_FAULT) {
 			dev_warn(&instance->pdev->dev, "Found FW in FAULT state,"
 			       " will reset adapter scsi%d.\n",
@@ -4596,7 +4598,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
 		mutex_unlock(&instance->reset_mutex);
 		return FAILED;
 	}
-	status_reg = instance->instancet->read_fw_status_reg(instance->reg_set);
+	status_reg = instance->instancet->read_fw_status_reg(instance);
 	abs_state = status_reg & MFI_STATE_MASK;
 
 	/* IO timeout detected, forcibly put FW in FAULT state */
@@ -4683,8 +4685,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int reason)
 
 		atomic_set(&instance->fw_outstanding, 0);
 
-		status_reg = instance->instancet->read_fw_status_reg(
-			instance->reg_set);
+		status_reg = instance->instancet->read_fw_status_reg(instance);
 		abs_state = status_reg & MFI_STATE_MASK;
 		reset_adapter = status_reg & MFI_RESET_ADAPTER;
 		if (instance->disableOnlineCtrlReset ||
@@ -4845,7 +4846,7 @@ void  megasas_fusion_crash_dump(struct megasas_instance *instance)
 	int wait = 0;
 
 
-	status_reg = instance->instancet->read_fw_status_reg(instance->reg_set);
+	status_reg = instance->instancet->read_fw_status_reg(instance);
 
 	/*
 	 * Allocate host crash buffers to copy data from 1 MB DMA crash buffer
@@ -4881,7 +4882,7 @@ void  megasas_fusion_crash_dump(struct megasas_instance *instance)
 			wait++;
 			msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
 			status_reg = instance->instancet->read_fw_status_reg(
-					instance->reg_set);
+					instance);
 			continue;
 		}
 
@@ -4904,8 +4905,7 @@ void  megasas_fusion_crash_dump(struct megasas_instance *instance)
 		readl(&instance->reg_set->outbound_scratch_pad_0);
 
 		msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS);
-		status_reg = instance->instancet->read_fw_status_reg(
-				instance->reg_set);
+		status_reg = instance->instancet->read_fw_status_reg(instance);
 	}
 
 	if (status_reg & MFI_STATE_CRASH_DUMP_DONE) {