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

From: [email-masked]
Date: Fri, 9 Oct 2020 12:49:44 -0700

From: Ira Weiny <[email-masked]>

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 <[email-masked]>
Cc: Daniel Vetter <[email-masked]>
Cc: Patrik Jakobsson <[email-masked]>
Signed-off-by: Ira Weiny <[email-masked]>
---
 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