linux-kernel - [PATCH 2/8] habanalabs: add RMWREG32_SHIFTED to set a val within a mask

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Date:   Wed, 23 Nov 2022 16:57:55 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Dafna Hirschfeld <dhirschfeld@...ana.ai>
Subject: [PATCH 2/8] habanalabs: add RMWREG32_SHIFTED to set a val within a mask

From: Dafna Hirschfeld <dhirschfeld@...ana.ai>

This is similar to RMWREG32, but the given 'val' is already shifted
according to the mask.
This allows several 'ORed' vals and masks to be set at once
The patch also fixes wrong usage of RMWREG32 by replacing
it with RMWREG32_SHIFTED

Signed-off-by: Dafna Hirschfeld <dhirschfeld@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/habanalabs.h | 10 +++-------
 drivers/misc/habanalabs/gaudi2/gaudi2.c     |  6 +++---
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index e7f89868428d..0329a0980bb7 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -2498,13 +2498,9 @@ void hl_wreg(struct hl_device *hdev, u32 reg, u32 val);
 #define WREG32_AND(reg, and) WREG32_P(reg, 0, and)
 #define WREG32_OR(reg, or) WREG32_P(reg, or, ~(or))
 
-#define RMWREG32(reg, val, mask)				\
-	do {							\
-		u32 tmp_ = RREG32(reg);				\
-		tmp_ &= ~(mask);				\
-		tmp_ |= ((val) << __ffs(mask));			\
-		WREG32(reg, tmp_);				\
-	} while (0)
+#define RMWREG32_SHIFTED(reg, val, mask) WREG32_P(reg, val, ~(mask))
+
+#define RMWREG32(reg, val, mask) RMWREG32_SHIFTED(reg, (val) << __ffs(mask), mask)
 
 #define RREG32_MASK(reg, mask) ((RREG32(reg) & mask) >> __ffs(mask))
 
diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2.c b/drivers/misc/habanalabs/gaudi2/gaudi2.c
index a33a9072fca4..e793fb2bdcbe 100644
--- a/drivers/misc/habanalabs/gaudi2/gaudi2.c
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2.c
@@ -5052,7 +5052,7 @@ static int gaudi2_pci_mmu_init(struct hl_device *hdev)
 	mmu_base = mmPMMU_HBW_MMU_BASE;
 	stlb_base = mmPMMU_HBW_STLB_BASE;
 
-	RMWREG32(stlb_base + STLB_HOP_CONFIGURATION_OFFSET,
+	RMWREG32_SHIFTED(stlb_base + STLB_HOP_CONFIGURATION_OFFSET,
 		(0 << PMMU_HBW_STLB_HOP_CONFIGURATION_FIRST_HOP_SHIFT) |
 		(5 << PMMU_HBW_STLB_HOP_CONFIGURATION_FIRST_LOOKUP_HOP_SMALL_P_SHIFT) |
 		(4 << PMMU_HBW_STLB_HOP_CONFIGURATION_FIRST_LOOKUP_HOP_LARGE_P_SHIFT) |
@@ -5068,7 +5068,7 @@ static int gaudi2_pci_mmu_init(struct hl_device *hdev)
 
 	if (PAGE_SIZE == SZ_64K) {
 		/* Set page sizes to 64K on hop5 and 16M on hop4 + enable 8 bit hops */
-		RMWREG32(mmu_base + MMU_STATIC_MULTI_PAGE_SIZE_OFFSET,
+		RMWREG32_SHIFTED(mmu_base + MMU_STATIC_MULTI_PAGE_SIZE_OFFSET,
 			FIELD_PREP(DCORE0_HMMU0_MMU_STATIC_MULTI_PAGE_SIZE_HOP5_PAGE_SIZE_MASK, 4) |
 			FIELD_PREP(DCORE0_HMMU0_MMU_STATIC_MULTI_PAGE_SIZE_HOP4_PAGE_SIZE_MASK, 3) |
 			FIELD_PREP(
@@ -5116,7 +5116,7 @@ static int gaudi2_dcore_hmmu_init(struct hl_device *hdev, int dcore_id,
 	RMWREG32(mmu_base + MMU_STATIC_MULTI_PAGE_SIZE_OFFSET, 5 /* 64MB */,
 			MMU_STATIC_MULTI_PAGE_SIZE_HOP4_PAGE_SIZE_MASK);
 
-	RMWREG32(stlb_base + STLB_HOP_CONFIGURATION_OFFSET,
+	RMWREG32_SHIFTED(stlb_base + STLB_HOP_CONFIGURATION_OFFSET,
 		FIELD_PREP(DCORE0_HMMU0_STLB_HOP_CONFIGURATION_FIRST_HOP_MASK, 0) |
 		FIELD_PREP(DCORE0_HMMU0_STLB_HOP_CONFIGURATION_FIRST_LOOKUP_HOP_SMALL_P_MASK, 3) |
 		FIELD_PREP(DCORE0_HMMU0_STLB_HOP_CONFIGURATION_FIRST_LOOKUP_HOP_LARGE_P_MASK, 3) |
-- 
2.25.1