On 20/08/2021 22:31, Alyssa Rosenzweig wrote:
Mali virtual addresses are 48-bit. Use a u64 instead of size_t to ensure we can express the "lock everything" condition as ~0ULL without relying on platform-specific behaviour.
'platform-specific behaviour' makes it sound like this is something to do with a particular board. This is 32bit/64bit - it's going to be broken on 32bit: large lock regions are not going to work.
Signed-off-by: Alyssa Rosenzweig alyssa.rosenzweig@collabora.com Suggested-by: Rob Herring robh@kernel.org Tested-by: Chris Morgan macromorgan@hotmail.com
Fixes: f3ba91228e8e ("drm/panfrost: Add initial panfrost driver")
Reviewed-by: Steven Price steven.price@arm.com
Steve
drivers/gpu/drm/panfrost/panfrost_mmu.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index f6e02d0392f4..3a795273e505 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -58,7 +58,7 @@ static int write_cmd(struct panfrost_device *pfdev, u32 as_nr, u32 cmd) }
static void lock_region(struct panfrost_device *pfdev, u32 as_nr,
u64 iova, size_t size)
u64 iova, u64 size){ u8 region_width; u64 region = iova & PAGE_MASK; @@ -78,7 +78,7 @@ static void lock_region(struct panfrost_device *pfdev, u32 as_nr,
static int mmu_hw_do_operation_locked(struct panfrost_device *pfdev, int as_nr,
u64 iova, size_t size, u32 op)
u64 iova, u64 size, u32 op){ if (as_nr < 0) return 0; @@ -95,7 +95,7 @@ static int mmu_hw_do_operation_locked(struct panfrost_device *pfdev, int as_nr,
static int mmu_hw_do_operation(struct panfrost_device *pfdev, struct panfrost_mmu *mmu,
u64 iova, size_t size, u32 op)
u64 iova, u64 size, u32 op){ int ret;
@@ -112,7 +112,7 @@ static void panfrost_mmu_enable(struct panfrost_device *pfdev, struct panfrost_m u64 transtab = cfg->arm_mali_lpae_cfg.transtab; u64 memattr = cfg->arm_mali_lpae_cfg.memattr;
- mmu_hw_do_operation_locked(pfdev, as_nr, 0, ~0UL, AS_COMMAND_FLUSH_MEM);
mmu_hw_do_operation_locked(pfdev, as_nr, 0, ~0ULL, AS_COMMAND_FLUSH_MEM);
mmu_write(pfdev, AS_TRANSTAB_LO(as_nr), transtab & 0xffffffffUL); mmu_write(pfdev, AS_TRANSTAB_HI(as_nr), transtab >> 32);
@@ -128,7 +128,7 @@ static void panfrost_mmu_enable(struct panfrost_device *pfdev, struct panfrost_m
static void panfrost_mmu_disable(struct panfrost_device *pfdev, u32 as_nr) {
- mmu_hw_do_operation_locked(pfdev, as_nr, 0, ~0UL, AS_COMMAND_FLUSH_MEM);
mmu_hw_do_operation_locked(pfdev, as_nr, 0, ~0ULL, AS_COMMAND_FLUSH_MEM);
mmu_write(pfdev, AS_TRANSTAB_LO(as_nr), 0); mmu_write(pfdev, AS_TRANSTAB_HI(as_nr), 0);
@@ -242,7 +242,7 @@ static size_t get_pgsize(u64 addr, size_t size)
static void panfrost_mmu_flush_range(struct panfrost_device *pfdev, struct panfrost_mmu *mmu,
u64 iova, size_t size)
u64 iova, u64 size){ if (mmu->as < 0) return;