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@xxxxxxxxxxxxx>
> Suggested-by: Rob Herring <robh@xxxxxxxxxx>
> Tested-by: Chris Morgan <macromorgan@xxxxxxxxxxx>
Fixes: f3ba91228e8e ("drm/panfrost: Add initial panfrost driver")
Reviewed-by: Steven Price <steven.price@xxxxxxx>
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;
>
