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Commit fe1229b9 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/tegra: smmu: Use helper function to check for valid register offset 



Do not repeat the checking loop in the read and write
functions. Use a single helper function for that check and
call it in both accessors.

Signed-off-by: default avatarJoerg Roedel <joro@8bytes.org>
parent a6870e92

drivers/iommu/tegra-smmu.c

+18 −17
Original line number Diff line number Diff line
@@ -327,36 +327,37 @@ static struct smmu_device *smmu_handle; /* unique for a system */ 
/*

 *	SMMU register accessors

 */

static inline u32 smmu_read(struct smmu_device *smmu, size_t offs)

static bool inline smmu_valid_reg(struct smmu_device *smmu,

				  void __iomem *addr)

{

	int i;



	for (i = 0; i < smmu->nregs; i++) {

		void __iomem *addr = smmu->regbase + offs;



		BUG_ON(addr < smmu->regs[i]);

		if (addr < smmu->regs[i])

			break;

		if (addr <= smmu->rege[i])

			return readl(addr);

			return true;

	}



	BUG();

	return false;

}



static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs)

static inline u32 smmu_read(struct smmu_device *smmu, size_t offs)

{

	int i;



	for (i = 0; i < smmu->nregs; i++) {

	void __iomem *addr = smmu->regbase + offs;



		BUG_ON(addr < smmu->regs[i]);

		if (addr <= smmu->rege[i]) {

			writel(val, addr);

			return;

		}

	BUG_ON(!smmu_valid_reg(smmu, addr));



	return readl(addr);

}



	BUG();

static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs)

{

	void __iomem *addr = smmu->regbase + offs;



	BUG_ON(!smmu_valid_reg(smmu, addr));



	writel(val, addr);

}



#define VA_PAGE_TO_PA(va, page)	\