Merge tag 'perf-tools-for-v5.15-2021-09-11' of git://git.kernel.org/pub/scm/linux...

[linux-2.6-microblaze.git] / drivers / gpu / drm / panfrost / panfrost_mmu.c

diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index 0da5b31..dfe5f1d 100644 (file)
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -58,25 +58,16 @@ 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;
-       /*
-        * fls returns:
-        * 1 .. 32
-        *
-        * 10 + fls(num_pages)
-        * results in the range (11 .. 42)
-        */
-
-       size = round_up(size, PAGE_SIZE);
 
-       region_width = 10 + fls(size >> PAGE_SHIFT);
-       if ((size >> PAGE_SHIFT) != (1ul << (region_width - 11))) {
-               /* not pow2, so must go up to the next pow2 */
-               region_width += 1;
-       }
+       /* The size is encoded as ceil(log2) minus(1), which may be calculated
+        * with fls. The size must be clamped to hardware bounds.
+        */
+       size = max_t(u64, size, AS_LOCK_REGION_MIN_SIZE);
+       region_width = fls64(size - 1) - 1;
        region |= region_width;
 
        /* Lock the region that needs to be updated */
@@ -87,7 +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;
@@ -104,7 +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;
 
@@ -121,7 +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);
@@ -137,7 +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);
@@ -251,7 +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;