[PATCH RFC PKS/PMEM 09/58] drivers/gpu: Utilize new kmap_thread()

From: ira . weiny
Date: Fri Oct 09 2020 - 15:52:07 EST

From: Ira Weiny <ira.weiny@xxxxxxxxx>

These kmap() calls in the gpu stack are localized to a single thread.
To avoid the over head of global PKRS updates use the new kmap_thread()
call.

Cc: David Airlie <airlied@xxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 12 ++++++------
drivers/gpu/drm/gma500/gma_display.c | 4 ++--
drivers/gpu/drm/gma500/mmu.c | 10 +++++-----
drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 4 ++--
.../gpu/drm/i915/gem/selftests/i915_gem_context.c | 4 ++--
drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c | 8 ++++----
drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c | 4 ++--
drivers/gpu/drm/i915/gt/intel_gtt.c | 4 ++--
drivers/gpu/drm/i915/gt/shmem_utils.c | 4 ++--
drivers/gpu/drm/i915/i915_gem.c | 8 ++++----
drivers/gpu/drm/i915/i915_gpu_error.c | 4 ++--
drivers/gpu/drm/i915/selftests/i915_perf.c | 4 ++--
drivers/gpu/drm/radeon/radeon_ttm.c | 4 ++--
13 files changed, 37 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 978bae731398..bd564bccb7a3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -2437,11 +2437,11 @@ static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf,

page = adev->gart.pages[p];
if (page) {
- ptr = kmap(page);
+ ptr = kmap_thread(page);
ptr += off;

r = copy_to_user(buf, ptr, cur_size);
- kunmap(adev->gart.pages[p]);
+ kunmap_thread(adev->gart.pages[p]);
} else
r = clear_user(buf, cur_size);

@@ -2507,9 +2507,9 @@ static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf,
if (p->mapping != adev->mman.bdev.dev_mapping)
return -EPERM;

- ptr = kmap(p);
+ ptr = kmap_thread(p);
r = copy_to_user(buf, ptr + off, bytes);
- kunmap(p);
+ kunmap_thread(p);
if (r)
return -EFAULT;

@@ -2558,9 +2558,9 @@ static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf,
if (p->mapping != adev->mman.bdev.dev_mapping)
return -EPERM;

- ptr = kmap(p);
+ ptr = kmap_thread(p);
r = copy_from_user(ptr + off, buf, bytes);
- kunmap(p);
+ kunmap_thread(p);
if (r)
return -EFAULT;

diff --git a/drivers/gpu/drm/gma500/gma_display.c b/drivers/gpu/drm/gma500/gma_display.c
index 3df6d6e850f5..35f4e55c941f 100644
--- a/drivers/gpu/drm/gma500/gma_display.c
+++ b/drivers/gpu/drm/gma500/gma_display.c
@@ -400,9 +400,9 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
/* Copy the cursor to cursor mem */
tmp_dst = dev_priv->vram_addr + cursor_gt->offset;
for (i = 0; i < cursor_pages; i++) {
- tmp_src = kmap(gt->pages[i]);
+ tmp_src = kmap_thread(gt->pages[i]);
memcpy(tmp_dst, tmp_src, PAGE_SIZE);
- kunmap(gt->pages[i]);
+ kunmap_thread(gt->pages[i]);
tmp_dst += PAGE_SIZE;
}

diff --git a/drivers/gpu/drm/gma500/mmu.c b/drivers/gpu/drm/gma500/mmu.c
index 505044c9a673..fba7a3a461fd 100644
--- a/drivers/gpu/drm/gma500/mmu.c
+++ b/drivers/gpu/drm/gma500/mmu.c
@@ -192,20 +192,20 @@ struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
pd->invalid_pte = 0;
}

- v = kmap(pd->dummy_pt);
+ v = kmap_thread(pd->dummy_pt);
for (i = 0; i < (PAGE_SIZE / sizeof(uint32_t)); ++i)
v[i] = pd->invalid_pte;

- kunmap(pd->dummy_pt);
+ kunmap_thread(pd->dummy_pt);

- v = kmap(pd->p);
+ v = kmap_thread(pd->p);
for (i = 0; i < (PAGE_SIZE / sizeof(uint32_t)); ++i)
v[i] = pd->invalid_pde;

- kunmap(pd->p);
+ kunmap_thread(pd->p);

clear_page(kmap(pd->dummy_page));
- kunmap(pd->dummy_page);
+ kunmap_thread(pd->dummy_page);

pd->tables = vmalloc_user(sizeof(struct psb_mmu_pt *) * 1024);
if (!pd->tables)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
index 38113d3c0138..274424795fb7 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
@@ -566,9 +566,9 @@ i915_gem_object_create_shmem_from_data(struct drm_i915_private *dev_priv,
if (err < 0)
goto fail;

- vaddr = kmap(page);
+ vaddr = kmap_thread(page);
memcpy(vaddr, data, len);
- kunmap(page);
+ kunmap_thread(page);

err = pagecache_write_end(file, file->f_mapping,
offset, len, len,
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index 7ffc3c751432..b466c677d007 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -1754,7 +1754,7 @@ static int check_scratch_page(struct i915_gem_context *ctx, u32 *out)
return -EINVAL;
}

- vaddr = kmap(page);
+ vaddr = kmap_thread(page);
if (!vaddr) {
pr_err("No (mappable) scratch page!\n");
return -EINVAL;
@@ -1765,7 +1765,7 @@ static int check_scratch_page(struct i915_gem_context *ctx, u32 *out)
pr_err("Inconsistent initial state of scratch page!\n");
err = -EINVAL;
}
- kunmap(page);
+ kunmap_thread(page);

return err;
}
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
index 9c7402ce5bf9..447df22e2e06 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
@@ -143,7 +143,7 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj,
intel_gt_flush_ggtt_writes(&to_i915(obj->base.dev)->gt);

p = i915_gem_object_get_page(obj, offset >> PAGE_SHIFT);
- cpu = kmap(p) + offset_in_page(offset);
+ cpu = kmap_thread(p) + offset_in_page(offset);
drm_clflush_virt_range(cpu, sizeof(*cpu));
if (*cpu != (u32)page) {
pr_err("Partial view for %lu [%u] (offset=%llu, size=%u [%llu, row size %u], fence=%d, tiling=%d, stride=%d) misalignment, expected write to page (%llu + %u [0x%llx]) of 0x%x, found 0x%x\n",
@@ -161,7 +161,7 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj,
}
*cpu = 0;
drm_clflush_virt_range(cpu, sizeof(*cpu));
- kunmap(p);
+ kunmap_thread(p);

out:
__i915_vma_put(vma);
@@ -236,7 +236,7 @@ static int check_partial_mappings(struct drm_i915_gem_object *obj,
intel_gt_flush_ggtt_writes(&to_i915(obj->base.dev)->gt);

p = i915_gem_object_get_page(obj, offset >> PAGE_SHIFT);
- cpu = kmap(p) + offset_in_page(offset);
+ cpu = kmap_thread(p) + offset_in_page(offset);
drm_clflush_virt_range(cpu, sizeof(*cpu));
if (*cpu != (u32)page) {
pr_err("Partial view for %lu [%u] (offset=%llu, size=%u [%llu, row size %u], fence=%d, tiling=%d, stride=%d) misalignment, expected write to page (%llu + %u [0x%llx]) of 0x%x, found 0x%x\n",
@@ -254,7 +254,7 @@ static int check_partial_mappings(struct drm_i915_gem_object *obj,
}
*cpu = 0;
drm_clflush_virt_range(cpu, sizeof(*cpu));
- kunmap(p);
+ kunmap_thread(p);
if (err)
return err;

diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c b/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c
index 7fb36b12fe7a..38da348282f1 100644
--- a/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c
+++ b/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c
@@ -731,7 +731,7 @@ static void swizzle_page(struct page *page)
char *vaddr;
int i;

- vaddr = kmap(page);
+ vaddr = kmap_thread(page);

for (i = 0; i < PAGE_SIZE; i += 128) {
memcpy(temp, &vaddr[i], 64);
@@ -739,7 +739,7 @@ static void swizzle_page(struct page *page)
memcpy(&vaddr[i + 64], temp, 64);
}

- kunmap(page);
+ kunmap_thread(page);
}

/**
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
index 2a72cce63fd9..4cfb24e9ed62 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -312,9 +312,9 @@ static void poison_scratch_page(struct page *page, unsigned long size)
do {
void *vaddr;

- vaddr = kmap(page);
+ vaddr = kmap_thread(page);
memset(vaddr, POISON_FREE, PAGE_SIZE);
- kunmap(page);
+ kunmap_thread(page);

page = pfn_to_page(page_to_pfn(page) + 1);
size -= PAGE_SIZE;
diff --git a/drivers/gpu/drm/i915/gt/shmem_utils.c b/drivers/gpu/drm/i915/gt/shmem_utils.c
index 43c7acbdc79d..a40d3130cebf 100644
--- a/drivers/gpu/drm/i915/gt/shmem_utils.c
+++ b/drivers/gpu/drm/i915/gt/shmem_utils.c
@@ -142,12 +142,12 @@ static int __shmem_rw(struct file *file, loff_t off,
if (IS_ERR(page))
return PTR_ERR(page);

- vaddr = kmap(page);
+ vaddr = kmap_thread(page);
if (write)
memcpy(vaddr + offset_in_page(off), ptr, this);
else
memcpy(ptr, vaddr + offset_in_page(off), this);
- kunmap(page);
+ kunmap_thread(page);
put_page(page);

len -= this;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 9aa3066cb75d..cae8300fd224 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -312,14 +312,14 @@ shmem_pread(struct page *page, int offset, int len, char __user *user_data,
char *vaddr;
int ret;

- vaddr = kmap(page);
+ vaddr = kmap_thread(page);

if (needs_clflush)
drm_clflush_virt_range(vaddr + offset, len);

ret = __copy_to_user(user_data, vaddr + offset, len);

- kunmap(page);
+ kunmap_thread(page);

return ret ? -EFAULT : 0;
}
@@ -708,7 +708,7 @@ shmem_pwrite(struct page *page, int offset, int len, char __user *user_data,
char *vaddr;
int ret;

- vaddr = kmap(page);
+ vaddr = kmap_thread(page);

if (needs_clflush_before)
drm_clflush_virt_range(vaddr + offset, len);
@@ -717,7 +717,7 @@ shmem_pwrite(struct page *page, int offset, int len, char __user *user_data,
if (!ret && needs_clflush_after)
drm_clflush_virt_range(vaddr + offset, len);

- kunmap(page);
+ kunmap_thread(page);

return ret ? -EFAULT : 0;
}
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 3e6cbb0d1150..aecd469b6b6e 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1058,9 +1058,9 @@ i915_vma_coredump_create(const struct intel_gt *gt,

drm_clflush_pages(&page, 1);

- s = kmap(page);
+ s = kmap_thread(page);
ret = compress_page(compress, s, dst, false);
- kunmap(page);
+ kunmap_thread(page);

drm_clflush_pages(&page, 1);

diff --git a/drivers/gpu/drm/i915/selftests/i915_perf.c b/drivers/gpu/drm/i915/selftests/i915_perf.c
index c2d001d9c0ec..7f7ef2d056f4 100644
--- a/drivers/gpu/drm/i915/selftests/i915_perf.c
+++ b/drivers/gpu/drm/i915/selftests/i915_perf.c
@@ -307,7 +307,7 @@ static int live_noa_gpr(void *arg)
}

/* Poison the ce->vm so we detect writes not to the GGTT gt->scratch */
- scratch = kmap(ce->vm->scratch[0].base.page);
+ scratch = kmap_thread(ce->vm->scratch[0].base.page);
memset(scratch, POISON_FREE, PAGE_SIZE);

rq = intel_context_create_request(ce);
@@ -405,7 +405,7 @@ static int live_noa_gpr(void *arg)
out_rq:
i915_request_put(rq);
out_ce:
- kunmap(ce->vm->scratch[0].base.page);
+ kunmap_thread(ce->vm->scratch[0].base.page);
intel_context_put(ce);
out:
stream_destroy(stream);
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 004344dce140..0aba0cac51e1 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -1013,11 +1013,11 @@ static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf,

page = rdev->gart.pages[p];
if (page) {
- ptr = kmap(page);
+ ptr = kmap_thread(page);
ptr += off;

r = copy_to_user(buf, ptr, cur_size);
- kunmap(rdev->gart.pages[p]);
+ kunmap_thread(rdev->gart.pages[p]);
} else
r = clear_user(buf, cur_size);

--
2.28.0.rc0.12.gb6a658bd00c9