The function drm_gem_cma_prime_vunmap() is empty. Remove it before changing the interface to use struct drm_buf_map.

Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Reviewed-by: Christian König christian.koenig@amd.com Tested-by: Sam Ravnborg sam@ravnborg.org --- drivers/gpu/drm/drm_gem_cma_helper.c | 17 ----------------- drivers/gpu/drm/vc4/vc4_bo.c | 1 - include/drm/drm_gem_cma_helper.h | 1 - 3 files changed, 19 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c index 2165633c9b9e..d527485ea0b7 100644 --- a/drivers/gpu/drm/drm_gem_cma_helper.c +++ b/drivers/gpu/drm/drm_gem_cma_helper.c @@ -537,23 +537,6 @@ void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj) } EXPORT_SYMBOL_GPL(drm_gem_cma_prime_vmap);

-/** - * drm_gem_cma_prime_vunmap - unmap a CMA GEM object from the kernel's virtual - * address space - * @obj: GEM object - * @vaddr: kernel virtual address where the CMA GEM object was mapped - * - * This function removes a buffer exported via DRM PRIME from the kernel's - * virtual address space. This is a no-op because CMA buffers cannot be - * unmapped from kernel space. Drivers using the CMA helpers should set this - * as their &drm_gem_object_funcs.vunmap callback. - */ -void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr) -{ - /* Nothing to do */ -} -EXPORT_SYMBOL_GPL(drm_gem_cma_prime_vunmap); - static const struct drm_gem_object_funcs drm_gem_cma_default_funcs = { .free = drm_gem_cma_free_object, .print_info = drm_gem_cma_print_info, diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c index f432278173cd..557f0d1e6437 100644 --- a/drivers/gpu/drm/vc4/vc4_bo.c +++ b/drivers/gpu/drm/vc4/vc4_bo.c @@ -387,7 +387,6 @@ static const struct drm_gem_object_funcs vc4_gem_object_funcs = { .export = vc4_prime_export, .get_sg_table = drm_gem_cma_prime_get_sg_table, .vmap = vc4_prime_vmap, - .vunmap = drm_gem_cma_prime_vunmap, .vm_ops = &vc4_vm_ops, };

diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h index 2bfa2502607a..a064b0d1c480 100644 --- a/include/drm/drm_gem_cma_helper.h +++ b/include/drm/drm_gem_cma_helper.h @@ -104,7 +104,6 @@ drm_gem_cma_prime_import_sg_table(struct drm_device *dev, int drm_gem_cma_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj); -void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);

struct drm_gem_object * drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size);

The functions exynos_drm_gem_prime_{vmap,vunmap}() are empty. Remove them before changing the interface to use struct drm_buf_map. As a side effect of removing drm_gem_prime_vmap(), the error code changes from ENOMEM to EOPNOTSUPP.

Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Acked-by: Christian König christian.koenig@amd.com Tested-by: Sam Ravnborg sam@ravnborg.org --- drivers/gpu/drm/exynos/exynos_drm_gem.c | 12 ------------ drivers/gpu/drm/exynos/exynos_drm_gem.h | 2 -- 2 files changed, 14 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index 4afbf5109cbf..4396224227d1 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -135,8 +135,6 @@ static const struct vm_operations_struct exynos_drm_gem_vm_ops = { static const struct drm_gem_object_funcs exynos_drm_gem_object_funcs = { .free = exynos_drm_gem_free_object, .get_sg_table = exynos_drm_gem_prime_get_sg_table, - .vmap = exynos_drm_gem_prime_vmap, - .vunmap = exynos_drm_gem_prime_vunmap, .vm_ops = &exynos_drm_gem_vm_ops, };

@@ -469,16 +467,6 @@ exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, return &exynos_gem->base; }

-void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj) -{ - return NULL; -} - -void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) -{ - /* Nothing to do */ -} - int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) { diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h index 74e926abeff0..a23272fb96fb 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.h +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h @@ -107,8 +107,6 @@ struct drm_gem_object * exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sgt); -void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj); -void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);

This patch replaces the vmap/vunmap's use of raw pointers in GEM object functions with instances of struct dma_buf_map. GEM backends are converted as well. For most of them, this simply changes the returned type.

TTM-based drivers now return information about the location of the memory, either system or I/O memory. GEM VRAM helpers and qxl now use ttm_bo_vmap() et al. Amdgpu, nouveau and radeon use drm_gem_ttm_vmap() et al instead of implementing their own vmap callbacks.

v7: * init QXL cursor to mapped BO buffer (kernel test robot) v5: * update vkms after switch to shmem v4: * use ttm_bo_vmap(), drm_gem_ttm_vmap(), et al. (Daniel, Christian) * fix a trailing { in drm_gem_vmap() * remove several empty functions instead of converting them (Daniel) * comment uses of raw pointers with a TODO (Daniel) * TODO list: convert more helpers to use struct dma_buf_map

Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Acked-by: Christian König christian.koenig@amd.com Tested-by: Sam Ravnborg sam@ravnborg.org --- Documentation/gpu/todo.rst | 18 ++++ drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 36 ------- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h | 2 - drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 5 +- drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 1 - drivers/gpu/drm/ast/ast_cursor.c | 27 +++-- drivers/gpu/drm/ast/ast_drv.h | 7 +- drivers/gpu/drm/drm_gem.c | 23 +++-- drivers/gpu/drm/drm_gem_cma_helper.c | 10 +- drivers/gpu/drm/drm_gem_shmem_helper.c | 48 +++++---- drivers/gpu/drm/drm_gem_vram_helper.c | 107 ++++++++++---------- drivers/gpu/drm/etnaviv/etnaviv_drv.h | 2 +- drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 9 +- drivers/gpu/drm/lima/lima_gem.c | 6 +- drivers/gpu/drm/lima/lima_sched.c | 11 +- drivers/gpu/drm/mgag200/mgag200_mode.c | 10 +- drivers/gpu/drm/nouveau/Kconfig | 1 + drivers/gpu/drm/nouveau/nouveau_bo.h | 2 - drivers/gpu/drm/nouveau/nouveau_gem.c | 6 +- drivers/gpu/drm/nouveau/nouveau_gem.h | 2 - drivers/gpu/drm/nouveau/nouveau_prime.c | 20 ---- drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 14 +-- drivers/gpu/drm/qxl/qxl_display.c | 15 ++- drivers/gpu/drm/qxl/qxl_draw.c | 14 ++- drivers/gpu/drm/qxl/qxl_drv.h | 11 +- drivers/gpu/drm/qxl/qxl_object.c | 31 +++--- drivers/gpu/drm/qxl/qxl_object.h | 2 +- drivers/gpu/drm/qxl/qxl_prime.c | 12 +-- drivers/gpu/drm/radeon/radeon.h | 1 - drivers/gpu/drm/radeon/radeon_gem.c | 7 +- drivers/gpu/drm/radeon/radeon_prime.c | 20 ---- drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 22 ++-- drivers/gpu/drm/rockchip/rockchip_drm_gem.h | 4 +- drivers/gpu/drm/tiny/cirrus.c | 10 +- drivers/gpu/drm/tiny/gm12u320.c | 10 +- drivers/gpu/drm/udl/udl_modeset.c | 8 +- drivers/gpu/drm/vboxvideo/vbox_mode.c | 11 +- drivers/gpu/drm/vc4/vc4_bo.c | 6 +- drivers/gpu/drm/vc4/vc4_drv.h | 2 +- drivers/gpu/drm/vgem/vgem_drv.c | 16 ++- drivers/gpu/drm/vkms/vkms_plane.c | 15 ++- drivers/gpu/drm/vkms/vkms_writeback.c | 22 ++-- drivers/gpu/drm/xen/xen_drm_front_gem.c | 18 ++-- drivers/gpu/drm/xen/xen_drm_front_gem.h | 6 +- include/drm/drm_gem.h | 5 +- include/drm/drm_gem_cma_helper.h | 2 +- include/drm/drm_gem_shmem_helper.h | 4 +- include/drm/drm_gem_vram_helper.h | 14 +-- 49 files changed, 349 insertions(+), 308 deletions(-)

diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index 6b224ef14455..59f63f1d7680 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -450,6 +450,24 @@ Contact: Ville Syrjälä, Daniel Vetter

Level: Intermediate

+Use struct dma_buf_map throughout codebase +------------------------------------------ + +Pointers to shared device memory are stored in struct dma_buf_map. Each +instance knows whether it refers to system or I/O memory. Most of the DRM-wide +interface have been converted to use struct dma_buf_map, but implementations +often still use raw pointers. + +The task is to use struct dma_buf_map where it makes sense. + +* Memory managers should use struct dma_buf_map for dma-buf-imported buffers. +* TTM might benefit from using struct dma_buf_map internally. +* Framebuffer copying and blitting helpers should operate on struct dma_buf_map. + +Contact: Thomas Zimmermann tzimmermann@suse.de, Christian König, Daniel Vetter + +Level: Intermediate +

Core refactorings ================= diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 64376dd298ed..f5c7aa7894d5 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -232,6 +232,7 @@ config DRM_RADEON select FW_LOADER select DRM_KMS_HELPER select DRM_TTM + select DRM_TTM_HELPER select POWER_SUPPLY select HWMON select BACKLIGHT_CLASS_DEVICE @@ -252,6 +253,7 @@ config DRM_AMDGPU select DRM_KMS_HELPER select DRM_SCHED select DRM_TTM + select DRM_TTM_HELPER select POWER_SUPPLY select HWMON select BACKLIGHT_CLASS_DEVICE diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c index 5b465ab774d1..e5919efca870 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -41,42 +41,6 @@ #include <linux/dma-fence-array.h> #include <linux/pci-p2pdma.h>

-/** - * amdgpu_gem_prime_vmap - &dma_buf_ops.vmap implementation - * @obj: GEM BO - * - * Sets up an in-kernel virtual mapping of the BO's memory. - * - * Returns: - * The virtual address of the mapping or an error pointer. - */ -void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj) -{ - struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); - int ret; - - ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, - &bo->dma_buf_vmap); - if (ret) - return ERR_PTR(ret); - - return bo->dma_buf_vmap.virtual; -} - -/** - * amdgpu_gem_prime_vunmap - &dma_buf_ops.vunmap implementation - * @obj: GEM BO - * @vaddr: Virtual address (unused) - * - * Tears down the in-kernel virtual mapping of the BO's memory. - */ -void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) -{ - struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); - - ttm_bo_kunmap(&bo->dma_buf_vmap); -} - /** * amdgpu_gem_prime_mmap - &drm_driver.gem_prime_mmap implementation * @obj: GEM BO diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h index 2c5c84a06bb9..39b5b9616fd8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h @@ -31,8 +31,6 @@ struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, struct dma_buf *dma_buf); bool amdgpu_dmabuf_is_xgmi_accessible(struct amdgpu_device *adev, struct amdgpu_bo *bo); -void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj); -void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index 8ea6fc745769..a6142ede78fb 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -33,6 +33,7 @@

#include <drm/amdgpu_drm.h> #include <drm/drm_debugfs.h> +#include <drm/drm_gem_ttm_helper.h>

#include "amdgpu.h" #include "amdgpu_display.h" @@ -220,8 +221,8 @@ static const struct drm_gem_object_funcs amdgpu_gem_object_funcs = { .open = amdgpu_gem_object_open, .close = amdgpu_gem_object_close, .export = amdgpu_gem_prime_export, - .vmap = amdgpu_gem_prime_vmap, - .vunmap = amdgpu_gem_prime_vunmap, + .vmap = drm_gem_ttm_vmap, + .vunmap = drm_gem_ttm_vunmap, };

/* diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h index 132e5f955180..01296ef0d673 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h @@ -100,7 +100,6 @@ struct amdgpu_bo { struct amdgpu_bo *parent; struct amdgpu_bo *shadow;

- struct ttm_bo_kmap_obj dma_buf_vmap; struct amdgpu_mn *mn;

diff --git a/drivers/gpu/drm/ast/ast_cursor.c b/drivers/gpu/drm/ast/ast_cursor.c index e0f4613918ad..742d43a7edf4 100644 --- a/drivers/gpu/drm/ast/ast_cursor.c +++ b/drivers/gpu/drm/ast/ast_cursor.c @@ -39,7 +39,7 @@ static void ast_cursor_fini(struct ast_private *ast)

for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) { gbo = ast->cursor.gbo[i]; - drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]); + drm_gem_vram_vunmap(gbo, &ast->cursor.map[i]); drm_gem_vram_unpin(gbo); drm_gem_vram_put(gbo); } @@ -60,7 +60,7 @@ int ast_cursor_init(struct ast_private *ast) struct drm_device *dev = &ast->base; size_t size, i; struct drm_gem_vram_object *gbo; - void __iomem *vaddr; + struct dma_buf_map map; int ret;

size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE); @@ -77,16 +77,15 @@ int ast_cursor_init(struct ast_private *ast) drm_gem_vram_put(gbo); goto err_drm_gem_vram_put; } - vaddr = drm_gem_vram_vmap(gbo); - if (IS_ERR(vaddr)) { - ret = PTR_ERR(vaddr); + ret = drm_gem_vram_vmap(gbo, &map); + if (ret) { drm_gem_vram_unpin(gbo); drm_gem_vram_put(gbo); goto err_drm_gem_vram_put; }

ast->cursor.gbo[i] = gbo; - ast->cursor.vaddr[i] = vaddr; + ast->cursor.map[i] = map; }

return drmm_add_action_or_reset(dev, ast_cursor_release, NULL); @@ -95,7 +94,7 @@ int ast_cursor_init(struct ast_private *ast) while (i) { --i; gbo = ast->cursor.gbo[i]; - drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]); + drm_gem_vram_vunmap(gbo, &ast->cursor.map[i]); drm_gem_vram_unpin(gbo); drm_gem_vram_put(gbo); } @@ -170,6 +169,7 @@ int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb) { struct drm_device *dev = &ast->base; struct drm_gem_vram_object *gbo; + struct dma_buf_map map; int ret; void *src; void __iomem *dst; @@ -183,18 +183,17 @@ int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb) ret = drm_gem_vram_pin(gbo, 0); if (ret) return ret; - src = drm_gem_vram_vmap(gbo); - if (IS_ERR(src)) { - ret = PTR_ERR(src); + ret = drm_gem_vram_vmap(gbo, &map); + if (ret) goto err_drm_gem_vram_unpin; - } + src = map.vaddr; /* TODO: Use mapping abstraction properly */

- dst = ast->cursor.vaddr[ast->cursor.next_index]; + dst = ast->cursor.map[ast->cursor.next_index].vaddr_iomem;

/* do data transfer to cursor BO */ update_cursor_image(dst, src, fb->width, fb->height);

- drm_gem_vram_vunmap(gbo, src); + drm_gem_vram_vunmap(gbo, &map); drm_gem_vram_unpin(gbo);

return 0; @@ -257,7 +256,7 @@ void ast_cursor_show(struct ast_private *ast, int x, int y, u8 __iomem *sig; u8 jreg;

- dst = ast->cursor.vaddr[ast->cursor.next_index]; + dst = ast->cursor.map[ast->cursor.next_index].vaddr;

sig = dst + AST_HWC_SIZE; writel(x, sig + AST_HWC_SIGNATURE_X); diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h index 467049ca8430..f963141dd851 100644 --- a/drivers/gpu/drm/ast/ast_drv.h +++ b/drivers/gpu/drm/ast/ast_drv.h @@ -28,10 +28,11 @@ #ifndef __AST_DRV_H__ #define __AST_DRV_H__

-#include <linux/types.h> -#include <linux/io.h> +#include <linux/dma-buf-map.h> #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> +#include <linux/io.h> +#include <linux/types.h>

#include <drm/drm_connector.h> #include <drm/drm_crtc.h> @@ -131,7 +132,7 @@ struct ast_private {

struct { struct drm_gem_vram_object *gbo[AST_DEFAULT_HWC_NUM]; - void __iomem *vaddr[AST_DEFAULT_HWC_NUM]; + struct dma_buf_map map[AST_DEFAULT_HWC_NUM]; unsigned int next_index; } cursor;

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index d586068f5509..4231fda26e70 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -36,6 +36,7 @@ #include <linux/pagemap.h> #include <linux/shmem_fs.h> #include <linux/dma-buf.h> +#include <linux/dma-buf-map.h> #include <linux/mem_encrypt.h> #include <linux/pagevec.h>

@@ -1207,26 +1208,30 @@ void drm_gem_unpin(struct drm_gem_object *obj)

void *drm_gem_vmap(struct drm_gem_object *obj) { - void *vaddr; + struct dma_buf_map map; + int ret;

- if (obj->funcs->vmap) - vaddr = obj->funcs->vmap(obj); - else - vaddr = ERR_PTR(-EOPNOTSUPP); + if (!obj->funcs->vmap) + return ERR_PTR(-EOPNOTSUPP);

- if (!vaddr) - vaddr = ERR_PTR(-ENOMEM); + ret = obj->funcs->vmap(obj, &map); + if (ret) + return ERR_PTR(ret); + else if (dma_buf_map_is_null(&map)) + return ERR_PTR(-ENOMEM);

- return vaddr; + return map.vaddr; }

void drm_gem_vunmap(struct drm_gem_object *obj, void *vaddr) { + struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(vaddr); + if (!vaddr) return;

if (obj->funcs->vunmap) - obj->funcs->vunmap(obj, vaddr); + obj->funcs->vunmap(obj, &map); }

/** diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c index d527485ea0b7..b57e3e9222f0 100644 --- a/drivers/gpu/drm/drm_gem_cma_helper.c +++ b/drivers/gpu/drm/drm_gem_cma_helper.c @@ -519,6 +519,8 @@ EXPORT_SYMBOL_GPL(drm_gem_cma_prime_mmap); * drm_gem_cma_prime_vmap - map a CMA GEM object into the kernel's virtual * address space * @obj: GEM object + * @map: Returns the kernel virtual address of the CMA GEM object's backing + * store. * * This function maps a buffer exported via DRM PRIME into the kernel's * virtual address space. Since the CMA buffers are already mapped into the @@ -527,13 +529,15 @@ EXPORT_SYMBOL_GPL(drm_gem_cma_prime_mmap); * driver's &drm_gem_object_funcs.vmap callback. * * Returns: - * The kernel virtual address of the CMA GEM object's backing store. + * 0 on success, or a negative error code otherwise. */ -void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj) +int drm_gem_cma_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);

- return cma_obj->vaddr; + dma_buf_map_set_vaddr(map, cma_obj->vaddr); + + return 0; } EXPORT_SYMBOL_GPL(drm_gem_cma_prime_vmap);

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 8233bda4692f..499189c48f0b 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -258,19 +258,25 @@ void drm_gem_shmem_unpin(struct drm_gem_object *obj) } EXPORT_SYMBOL(drm_gem_shmem_unpin);

-static void *drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem) +static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, struct dma_buf_map *map) { struct drm_gem_object *obj = &shmem->base; - struct dma_buf_map map; int ret = 0;

- if (shmem->vmap_use_count++ > 0) - return shmem->vaddr; + if (shmem->vmap_use_count++ > 0) { + dma_buf_map_set_vaddr(map, shmem->vaddr); + return 0; + }

if (obj->import_attach) { - ret = dma_buf_vmap(obj->import_attach->dmabuf, &map); - if (!ret) - shmem->vaddr = map.vaddr; + ret = dma_buf_vmap(obj->import_attach->dmabuf, map); + if (!ret) { + if (WARN_ON(map->is_iomem)) { + ret = -EIO; + goto err_put_pages; + } + shmem->vaddr = map->vaddr; + } } else { pgprot_t prot = PAGE_KERNEL;

@@ -284,6 +290,8 @@ static void *drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem) VM_MAP, prot); if (!shmem->vaddr) ret = -ENOMEM; + else + dma_buf_map_set_vaddr(map, shmem->vaddr); }

if (ret) { @@ -291,7 +299,7 @@ static void *drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem) goto err_put_pages; }

- return shmem->vaddr; + return 0;

err_put_pages: if (!obj->import_attach) @@ -299,12 +307,14 @@ static void *drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem) err_zero_use: shmem->vmap_use_count = 0;

- return ERR_PTR(ret); + return ret; }

/* * drm_gem_shmem_vmap - Create a virtual mapping for a shmem GEM object * @shmem: shmem GEM object + * @map: Returns the kernel virtual address of the SHMEM GEM object's backing + * store. * * This function makes sure that a contiguous kernel virtual address mapping * exists for the buffer backing the shmem GEM object. @@ -318,26 +328,25 @@ static void *drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem) * Returns: * 0 on success or a negative error code on failure. */ -void *drm_gem_shmem_vmap(struct drm_gem_object *obj) +int drm_gem_shmem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); - void *vaddr; int ret;

ret = mutex_lock_interruptible(&shmem->vmap_lock); if (ret) - return ERR_PTR(ret); - vaddr = drm_gem_shmem_vmap_locked(shmem); + return ret; + ret = drm_gem_shmem_vmap_locked(shmem, map); mutex_unlock(&shmem->vmap_lock);

- return vaddr; + return ret; } EXPORT_SYMBOL(drm_gem_shmem_vmap);

-static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem) +static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem, + struct dma_buf_map *map) { struct drm_gem_object *obj = &shmem->base; - struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(shmem->vaddr);

if (WARN_ON_ONCE(!shmem->vmap_use_count)) return; @@ -346,7 +355,7 @@ static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem) return;

if (obj->import_attach) - dma_buf_vunmap(obj->import_attach->dmabuf, &map); + dma_buf_vunmap(obj->import_attach->dmabuf, map); else vunmap(shmem->vaddr);

@@ -357,6 +366,7 @@ static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem) /* * drm_gem_shmem_vunmap - Unmap a virtual mapping fo a shmem GEM object * @shmem: shmem GEM object + * @map: Kernel virtual address where the SHMEM GEM object was mapped * * This function cleans up a kernel virtual address mapping acquired by * drm_gem_shmem_vmap(). The mapping is only removed when the use count drops to @@ -366,12 +376,12 @@ static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem) * also be called by drivers directly, in which case it will hide the * differences between dma-buf imported and natively allocated objects. */ -void drm_gem_shmem_vunmap(struct drm_gem_object *obj, void *vaddr) +void drm_gem_shmem_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);

mutex_lock(&shmem->vmap_lock); - drm_gem_shmem_vunmap_locked(shmem); + drm_gem_shmem_vunmap_locked(shmem, map); mutex_unlock(&shmem->vmap_lock); } EXPORT_SYMBOL(drm_gem_shmem_vunmap); diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c index e305fadb8bc8..5e1b09ba5f2b 100644 --- a/drivers/gpu/drm/drm_gem_vram_helper.c +++ b/drivers/gpu/drm/drm_gem_vram_helper.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-or-later

+#include <linux/dma-buf-map.h> #include <linux/module.h>

#include <drm/drm_debugfs.h> @@ -112,8 +113,8 @@ static void drm_gem_vram_cleanup(struct drm_gem_vram_object *gbo) * up; only release the GEM object. */

- WARN_ON(gbo->kmap_use_count); - WARN_ON(gbo->kmap.virtual); + WARN_ON(gbo->vmap_use_count); + WARN_ON(dma_buf_map_is_set(&gbo->map));

drm_gem_object_release(&gbo->bo.base); } @@ -378,29 +379,37 @@ int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo) } EXPORT_SYMBOL(drm_gem_vram_unpin);

-static void *drm_gem_vram_kmap_locked(struct drm_gem_vram_object *gbo) +static int drm_gem_vram_kmap_locked(struct drm_gem_vram_object *gbo, + struct dma_buf_map *map) { int ret; - struct ttm_bo_kmap_obj *kmap = &gbo->kmap; - bool is_iomem;

- if (gbo->kmap_use_count > 0) + if (gbo->vmap_use_count > 0) goto out;

- ret = ttm_bo_kmap(&gbo->bo, 0, gbo->bo.num_pages, kmap); + ret = ttm_bo_vmap(&gbo->bo, &gbo->map); if (ret) - return ERR_PTR(ret); + return ret;

out: - ++gbo->kmap_use_count; - return ttm_kmap_obj_virtual(kmap, &is_iomem); + ++gbo->vmap_use_count; + *map = gbo->map; + + return 0; }

-static void drm_gem_vram_kunmap_locked(struct drm_gem_vram_object *gbo) +static void drm_gem_vram_kunmap_locked(struct drm_gem_vram_object *gbo, + struct dma_buf_map *map) { - if (WARN_ON_ONCE(!gbo->kmap_use_count)) + struct drm_device *dev = gbo->bo.base.dev; + + if (drm_WARN_ON_ONCE(dev, !gbo->vmap_use_count)) return; - if (--gbo->kmap_use_count > 0) + + if (drm_WARN_ON_ONCE(dev, !dma_buf_map_is_equal(&gbo->map, map))) + return; /* BUG: map not mapped from this BO */ + + if (--gbo->vmap_use_count > 0) return;

/* @@ -414,7 +423,9 @@ static void drm_gem_vram_kunmap_locked(struct drm_gem_vram_object *gbo) /** * drm_gem_vram_vmap() - Pins and maps a GEM VRAM object into kernel address * space - * @gbo: The GEM VRAM object to map + * @gbo: The GEM VRAM object to map + * @map: Returns the kernel virtual address of the VRAM GEM object's backing + * store. * * The vmap function pins a GEM VRAM object to its current location, either * system or video memory, and maps its buffer into kernel address space. @@ -423,48 +434,44 @@ static void drm_gem_vram_kunmap_locked(struct drm_gem_vram_object *gbo) * unmap and unpin the GEM VRAM object. * * Returns: - * The buffer's virtual address on success, or - * an ERR_PTR()-encoded error code otherwise. + * 0 on success, or a negative error code otherwise. */ -void *drm_gem_vram_vmap(struct drm_gem_vram_object *gbo) +int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map) { int ret; - void *base;

ret = ttm_bo_reserve(&gbo->bo, true, false, NULL); if (ret) - return ERR_PTR(ret); + return ret;

ret = drm_gem_vram_pin_locked(gbo, 0); if (ret) goto err_ttm_bo_unreserve; - base = drm_gem_vram_kmap_locked(gbo); - if (IS_ERR(base)) { - ret = PTR_ERR(base); + ret = drm_gem_vram_kmap_locked(gbo, map); + if (ret) goto err_drm_gem_vram_unpin_locked; - }

ttm_bo_unreserve(&gbo->bo);

- return base; + return 0;

err_drm_gem_vram_unpin_locked: drm_gem_vram_unpin_locked(gbo); err_ttm_bo_unreserve: ttm_bo_unreserve(&gbo->bo); - return ERR_PTR(ret); + return ret; } EXPORT_SYMBOL(drm_gem_vram_vmap);

/** * drm_gem_vram_vunmap() - Unmaps and unpins a GEM VRAM object - * @gbo: The GEM VRAM object to unmap - * @vaddr: The mapping's base address as returned by drm_gem_vram_vmap() + * @gbo: The GEM VRAM object to unmap + * @map: Kernel virtual address where the VRAM GEM object was mapped * * A call to drm_gem_vram_vunmap() unmaps and unpins a GEM VRAM buffer. See * the documentation for drm_gem_vram_vmap() for more information. */ -void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, void *vaddr) +void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map) { int ret;

@@ -472,7 +479,7 @@ void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, void *vaddr) if (WARN_ONCE(ret, "ttm_bo_reserve_failed(): ret=%d\n", ret)) return;

- drm_gem_vram_kunmap_locked(gbo); + drm_gem_vram_kunmap_locked(gbo, map); drm_gem_vram_unpin_locked(gbo);

ttm_bo_unreserve(&gbo->bo); @@ -563,15 +570,13 @@ static void drm_gem_vram_bo_driver_move_notify(struct drm_gem_vram_object *gbo, bool evict, struct ttm_resource *new_mem) { - struct ttm_bo_kmap_obj *kmap = &gbo->kmap; + struct ttm_buffer_object *bo = &gbo->bo; + struct drm_device *dev = bo->base.dev;

- if (WARN_ON_ONCE(gbo->kmap_use_count)) + if (drm_WARN_ON_ONCE(dev, gbo->vmap_use_count)) return;

- if (!kmap->virtual) - return; - ttm_bo_kunmap(kmap); - kmap->virtual = NULL; + ttm_bo_vunmap(bo, &gbo->map); }

static int drm_gem_vram_bo_driver_move(struct drm_gem_vram_object *gbo, @@ -837,37 +842,33 @@ static void drm_gem_vram_object_unpin(struct drm_gem_object *gem) }

/** - * drm_gem_vram_object_vmap() - \ - Implements &struct drm_gem_object_funcs.vmap - * @gem: The GEM object to map + * drm_gem_vram_object_vmap() - + * Implements &struct drm_gem_object_funcs.vmap + * @gem: The GEM object to map + * @map: Returns the kernel virtual address of the VRAM GEM object's backing + * store. * * Returns: - * The buffers virtual address on success, or - * NULL otherwise. + * 0 on success, or a negative error code otherwise. */ -static void *drm_gem_vram_object_vmap(struct drm_gem_object *gem) +static int drm_gem_vram_object_vmap(struct drm_gem_object *gem, struct dma_buf_map *map) { struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem); - void *base;

- base = drm_gem_vram_vmap(gbo); - if (IS_ERR(base)) - return NULL; - return base; + return drm_gem_vram_vmap(gbo, map); }

/** - * drm_gem_vram_object_vunmap() - \ - Implements &struct drm_gem_object_funcs.vunmap - * @gem: The GEM object to unmap - * @vaddr: The mapping's base address + * drm_gem_vram_object_vunmap() - + * Implements &struct drm_gem_object_funcs.vunmap + * @gem: The GEM object to unmap + * @map: Kernel virtual address where the VRAM GEM object was mapped */ -static void drm_gem_vram_object_vunmap(struct drm_gem_object *gem, - void *vaddr) +static void drm_gem_vram_object_vunmap(struct drm_gem_object *gem, struct dma_buf_map *map) { struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);

- drm_gem_vram_vunmap(gbo, vaddr); + drm_gem_vram_vunmap(gbo, map); }

/* diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h index 9682c26d89bb..f5be627e1de0 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h @@ -51,7 +51,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data, int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma); int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset); struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj); -void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj); +int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map); int etnaviv_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev, diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c index a6d9932a32ae..bc2543dd987d 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c @@ -22,9 +22,14 @@ struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj) return drm_prime_pages_to_sg(obj->dev, etnaviv_obj->pages, npages); }

-void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj) +int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { - return etnaviv_gem_vmap(obj); + void *vaddr = etnaviv_gem_vmap(obj); + if (!vaddr) + return -ENOMEM; + dma_buf_map_set_vaddr(map, vaddr); + + return 0; }

int etnaviv_gem_prime_mmap(struct drm_gem_object *obj, diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c index 11223fe348df..832e5280a6ed 100644 --- a/drivers/gpu/drm/lima/lima_gem.c +++ b/drivers/gpu/drm/lima/lima_gem.c @@ -182,14 +182,14 @@ static int lima_gem_pin(struct drm_gem_object *obj) return drm_gem_shmem_pin(obj); }

-static void *lima_gem_vmap(struct drm_gem_object *obj) +static int lima_gem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct lima_bo *bo = to_lima_bo(obj);

if (bo->heap_size) - return ERR_PTR(-EINVAL); + return -EINVAL;

- return drm_gem_shmem_vmap(obj); + return drm_gem_shmem_vmap(obj, map); }

static int lima_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c index dc6df9e9a40d..a070a85f8f36 100644 --- a/drivers/gpu/drm/lima/lima_sched.c +++ b/drivers/gpu/drm/lima/lima_sched.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 OR MIT /* Copyright 2017-2019 Qiang Yu yuq825@gmail.com */

+#include <linux/dma-buf-map.h> #include <linux/kthread.h> #include <linux/slab.h> #include <linux/vmalloc.h> @@ -303,6 +304,8 @@ static void lima_sched_build_error_task_list(struct lima_sched_task *task) struct lima_dump_chunk_buffer *buffer_chunk; u32 size, task_size, mem_size; int i; + struct dma_buf_map map; + int ret;

mutex_lock(&dev->error_task_list_lock);

@@ -388,15 +391,15 @@ static void lima_sched_build_error_task_list(struct lima_sched_task *task) } else { buffer_chunk->size = lima_bo_size(bo);

- data = drm_gem_shmem_vmap(&bo->base.base); - if (IS_ERR_OR_NULL(data)) { + ret = drm_gem_shmem_vmap(&bo->base.base, &map); + if (ret) { kvfree(et); goto out; }

- memcpy(buffer_chunk + 1, data, buffer_chunk->size); + memcpy(buffer_chunk + 1, map.vaddr, buffer_chunk->size);

- drm_gem_shmem_vunmap(&bo->base.base, data); + drm_gem_shmem_vunmap(&bo->base.base, &map); }

buffer_chunk = (void *)(buffer_chunk + 1) + buffer_chunk->size; diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 38672f9e5c4f..8ef76769b97f 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -9,6 +9,7 @@ */

#include <linux/delay.h> +#include <linux/dma-buf-map.h>

#include <drm/drm_atomic_helper.h> #include <drm/drm_atomic_state_helper.h> @@ -1556,15 +1557,18 @@ mgag200_handle_damage(struct mga_device *mdev, struct drm_framebuffer *fb, struct drm_rect *clip) { struct drm_device *dev = &mdev->base; + struct dma_buf_map map; void *vmap; + int ret;

- vmap = drm_gem_shmem_vmap(fb->obj[0]); - if (drm_WARN_ON(dev, !vmap)) + ret = drm_gem_shmem_vmap(fb->obj[0], &map); + if (drm_WARN_ON(dev, ret)) return; /* BUG: SHMEM BO should always be vmapped */ + vmap = map.vaddr; /* TODO: Use mapping abstraction properly */

drm_fb_memcpy_dstclip(mdev->vram, vmap, fb, clip);

- drm_gem_shmem_vunmap(fb->obj[0], vmap); + drm_gem_shmem_vunmap(fb->obj[0], &map);

/* Always scanout image at VRAM offset 0 */ mgag200_set_startadd(mdev, (u32)0); diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig index 5dec1e5694b7..9436310d0854 100644 --- a/drivers/gpu/drm/nouveau/Kconfig +++ b/drivers/gpu/drm/nouveau/Kconfig @@ -6,6 +6,7 @@ config DRM_NOUVEAU select FW_LOADER select DRM_KMS_HELPER select DRM_TTM + select DRM_TTM_HELPER select BACKLIGHT_CLASS_DEVICE if DRM_NOUVEAU_BACKLIGHT select ACPI_VIDEO if ACPI && X86 && BACKLIGHT_CLASS_DEVICE && INPUT select X86_PLATFORM_DEVICES if ACPI && X86 diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.h b/drivers/gpu/drm/nouveau/nouveau_bo.h index 641ef6298a0e..6045b85a762a 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.h +++ b/drivers/gpu/drm/nouveau/nouveau_bo.h @@ -39,8 +39,6 @@ struct nouveau_bo { unsigned mode;

struct nouveau_drm_tile *tile; - - struct ttm_bo_kmap_obj dma_buf_vmap; };

static inline struct nouveau_bo * diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index dd51cd0ae20c..787d05eefd9c 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -24,6 +24,8 @@ * */

+#include <drm/drm_gem_ttm_helper.h> + #include "nouveau_drv.h" #include "nouveau_dma.h" #include "nouveau_fence.h" @@ -176,8 +178,8 @@ const struct drm_gem_object_funcs nouveau_gem_object_funcs = { .pin = nouveau_gem_prime_pin, .unpin = nouveau_gem_prime_unpin, .get_sg_table = nouveau_gem_prime_get_sg_table, - .vmap = nouveau_gem_prime_vmap, - .vunmap = nouveau_gem_prime_vunmap, + .vmap = drm_gem_ttm_vmap, + .vunmap = drm_gem_ttm_vunmap, };

int diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.h b/drivers/gpu/drm/nouveau/nouveau_gem.h index b35c180322e2..3b919c7c931c 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.h +++ b/drivers/gpu/drm/nouveau/nouveau_gem.h @@ -37,7 +37,5 @@ extern void nouveau_gem_prime_unpin(struct drm_gem_object *); extern struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *); extern struct drm_gem_object *nouveau_gem_prime_import_sg_table( struct drm_device *, struct dma_buf_attachment *, struct sg_table *); -extern void *nouveau_gem_prime_vmap(struct drm_gem_object *); -extern void nouveau_gem_prime_vunmap(struct drm_gem_object *, void *);

#endif diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c index a8264aebf3d4..2f16b5249283 100644 --- a/drivers/gpu/drm/nouveau/nouveau_prime.c +++ b/drivers/gpu/drm/nouveau/nouveau_prime.c @@ -35,26 +35,6 @@ struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj) return drm_prime_pages_to_sg(obj->dev, nvbo->bo.ttm->pages, npages); }

-void *nouveau_gem_prime_vmap(struct drm_gem_object *obj) -{ - struct nouveau_bo *nvbo = nouveau_gem_object(obj); - int ret; - - ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages, - &nvbo->dma_buf_vmap); - if (ret) - return ERR_PTR(ret); - - return nvbo->dma_buf_vmap.virtual; -} - -void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) -{ - struct nouveau_bo *nvbo = nouveau_gem_object(obj); - - ttm_bo_kunmap(&nvbo->dma_buf_vmap); -} - struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sg) diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c index fdbc8d949135..5ab03d605f57 100644 --- a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c @@ -5,6 +5,7 @@ #include <drm/drm_gem_shmem_helper.h> #include <drm/panfrost_drm.h> #include <linux/completion.h> +#include <linux/dma-buf-map.h> #include <linux/iopoll.h> #include <linux/pm_runtime.h> #include <linux/slab.h> @@ -72,6 +73,7 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, { struct panfrost_file_priv *user = file_priv->driver_priv; struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; + struct dma_buf_map map; struct drm_gem_shmem_object *bo; u32 cfg, as; int ret; @@ -103,11 +105,10 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, goto err_close_bo; }

- perfcnt->buf = drm_gem_shmem_vmap(&bo->base); - if (IS_ERR(perfcnt->buf)) { - ret = PTR_ERR(perfcnt->buf); + ret = drm_gem_shmem_vmap(&bo->base, &map); + if (ret) goto err_put_mapping; - } + perfcnt->buf = map.vaddr;

/* * Invalidate the cache and clear the counters to start from a fresh @@ -163,7 +164,7 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, return 0;

err_vunmap: - drm_gem_shmem_vunmap(&bo->base, perfcnt->buf); + drm_gem_shmem_vunmap(&bo->base, &map); err_put_mapping: panfrost_gem_mapping_put(perfcnt->mapping); err_close_bo: @@ -180,6 +181,7 @@ static int panfrost_perfcnt_disable_locked(struct panfrost_device *pfdev, { struct panfrost_file_priv *user = file_priv->driver_priv; struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; + struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(perfcnt->buf);

if (user != perfcnt->user) return -EINVAL; @@ -192,7 +194,7 @@ static int panfrost_perfcnt_disable_locked(struct panfrost_device *pfdev, GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF));

perfcnt->user = NULL; - drm_gem_shmem_vunmap(&perfcnt->mapping->obj->base.base, perfcnt->buf); + drm_gem_shmem_vunmap(&perfcnt->mapping->obj->base.base, &map); perfcnt->buf = NULL; panfrost_gem_close(&perfcnt->mapping->obj->base.base, file_priv); panfrost_mmu_as_put(pfdev, perfcnt->mapping->mmu); diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c index 45fd76e04bdc..b783c3abdfc9 100644 --- a/drivers/gpu/drm/qxl/qxl_display.c +++ b/drivers/gpu/drm/qxl/qxl_display.c @@ -25,6 +25,7 @@

#include <linux/crc32.h> #include <linux/delay.h> +#include <linux/dma-buf-map.h>

#include <drm/drm_drv.h> #include <drm/drm_atomic.h> @@ -581,6 +582,8 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane, struct drm_gem_object *obj; struct qxl_bo *cursor_bo = NULL, *user_bo = NULL, *old_cursor_bo = NULL; int ret; + struct dma_buf_map user_map; + struct dma_buf_map cursor_map; void *user_ptr; int size = 64*64*4;

@@ -595,9 +598,10 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane, user_bo = gem_to_qxl_bo(obj);

/* pinning is done in the prepare/cleanup framevbuffer */ - ret = qxl_bo_kmap(user_bo, &user_ptr); + ret = qxl_bo_kmap(user_bo, &user_map); if (ret) goto out_free_release; + user_ptr = user_map.vaddr; /* TODO: Use mapping abstraction properly */

ret = qxl_alloc_bo_reserved(qdev, release, sizeof(struct qxl_cursor) + size, @@ -613,9 +617,13 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane, if (ret) goto out_unpin;

- ret = qxl_bo_kmap(cursor_bo, (void **)&cursor); + ret = qxl_bo_kmap(cursor_bo, &cursor_map); if (ret) goto out_backoff; + if (cursor_map.is_iomem) /* TODO: Use mapping abstraction properly */ + cursor = (struct qxl_cursor __force *)cursor_map.vaddr_iomem; + else + cursor = (struct qxl_cursor *)cursor_map.vaddr;

cursor->header.unique = 0; cursor->header.type = SPICE_CURSOR_TYPE_ALPHA; @@ -1133,6 +1141,7 @@ int qxl_create_monitors_object(struct qxl_device *qdev) { int ret; struct drm_gem_object *gobj; + struct dma_buf_map map; int monitors_config_size = sizeof(struct qxl_monitors_config) + qxl_num_crtc * sizeof(struct qxl_head);

@@ -1149,7 +1158,7 @@ int qxl_create_monitors_object(struct qxl_device *qdev) if (ret) return ret;

- qxl_bo_kmap(qdev->monitors_config_bo, NULL); + qxl_bo_kmap(qdev->monitors_config_bo, &map);

qdev->monitors_config = qdev->monitors_config_bo->kptr; qdev->ram_header->monitors_config = diff --git a/drivers/gpu/drm/qxl/qxl_draw.c b/drivers/gpu/drm/qxl/qxl_draw.c index 3599db096973..7b7acb910780 100644 --- a/drivers/gpu/drm/qxl/qxl_draw.c +++ b/drivers/gpu/drm/qxl/qxl_draw.c @@ -20,6 +20,8 @@ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */

+#include <linux/dma-buf-map.h> + #include <drm/drm_fourcc.h>

#include "qxl_drv.h" @@ -42,13 +44,15 @@ static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev, unsigned int num_clips, struct qxl_bo *clips_bo) { + struct dma_buf_map map; struct qxl_clip_rects *dev_clips; int ret;

- ret = qxl_bo_kmap(clips_bo, (void **)&dev_clips); - if (ret) { + ret = qxl_bo_kmap(clips_bo, &map); + if (ret) return NULL; - } + dev_clips = map.vaddr; /* TODO: Use mapping abstraction properly */ + dev_clips->num_rects = num_clips; dev_clips->chunk.next_chunk = 0; dev_clips->chunk.prev_chunk = 0; @@ -142,6 +146,7 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev, int stride = fb->pitches[0]; /* depth is not actually interesting, we don't mask with it */ int depth = fb->format->cpp[0] * 8; + struct dma_buf_map surface_map; uint8_t *surface_base; struct qxl_release *release; struct qxl_bo *clips_bo; @@ -197,9 +202,10 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev, if (ret) goto out_release_backoff;

- ret = qxl_bo_kmap(bo, (void **)&surface_base); + ret = qxl_bo_kmap(bo, &surface_map); if (ret) goto out_release_backoff; + surface_base = surface_map.vaddr; /* TODO: Use mapping abstraction properly */

ret = qxl_image_init(qdev, release, dimage, surface_base, left - dumb_shadow_offset, diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h index 3602e8b34189..eb437fea5d9e 100644 --- a/drivers/gpu/drm/qxl/qxl_drv.h +++ b/drivers/gpu/drm/qxl/qxl_drv.h @@ -30,6 +30,7 @@ * Definitions taken from spice-protocol, plus kernel driver specific bits. */

+#include <linux/dma-buf-map.h> #include <linux/dma-fence.h> #include <linux/firmware.h> #include <linux/platform_device.h> @@ -50,6 +51,8 @@

#include "qxl_dev.h"

+struct dma_buf_map; + #define DRIVER_AUTHOR "Dave Airlie"

#define DRIVER_NAME "qxl" @@ -79,7 +82,7 @@ struct qxl_bo { /* Protected by tbo.reserved */ struct ttm_place placements[3]; struct ttm_placement placement; - struct ttm_bo_kmap_obj kmap; + struct dma_buf_map map; void *kptr; unsigned int map_count; int type; @@ -335,7 +338,6 @@ int qxl_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv); void qxl_gem_object_close(struct drm_gem_object *obj, struct drm_file *file_priv); void qxl_bo_force_delete(struct qxl_device *qdev); -int qxl_bo_kmap(struct qxl_bo *bo, void **ptr);

/* qxl_dumb.c */ int qxl_mode_dumb_create(struct drm_file *file_priv, @@ -445,8 +447,9 @@ struct sg_table *qxl_gem_prime_get_sg_table(struct drm_gem_object *obj); struct drm_gem_object *qxl_gem_prime_import_sg_table( struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sgt); -void *qxl_gem_prime_vmap(struct drm_gem_object *obj); -void qxl_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); +int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map); +void qxl_gem_prime_vunmap(struct drm_gem_object *obj, + struct dma_buf_map *map); int qxl_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);

diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c index 547d46c14d56..ceebc5881f68 100644 --- a/drivers/gpu/drm/qxl/qxl_object.c +++ b/drivers/gpu/drm/qxl/qxl_object.c @@ -23,10 +23,12 @@ * Alon Levy */

+#include <linux/dma-buf-map.h> +#include <linux/io-mapping.h> + #include "qxl_drv.h" #include "qxl_object.h"

-#include <linux/io-mapping.h> static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo) { struct qxl_bo *bo; @@ -152,24 +154,27 @@ int qxl_bo_create(struct qxl_device *qdev, return 0; }

-int qxl_bo_kmap(struct qxl_bo *bo, void **ptr) +int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map) { - bool is_iomem; int r;

if (bo->kptr) { - if (ptr) - *ptr = bo->kptr; bo->map_count++; - return 0; + goto out; } - r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap); + r = ttm_bo_vmap(&bo->tbo, &bo->map); if (r) return r; - bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); - if (ptr) - *ptr = bo->kptr; bo->map_count = 1; + + /* TODO: Remove kptr in favor of map everywhere. */ + if (bo->map.is_iomem) + bo->kptr = (void *)bo->map.vaddr_iomem; + else + bo->kptr = bo->map.vaddr; + +out: + *map = bo->map; return 0; }

@@ -180,6 +185,7 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, void *rptr; int ret; struct io_mapping *map; + struct dma_buf_map bo_map;

if (bo->tbo.mem.mem_type == TTM_PL_VRAM) map = qdev->vram_mapping; @@ -196,9 +202,10 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, return rptr; }

- ret = qxl_bo_kmap(bo, &rptr); + ret = qxl_bo_kmap(bo, &bo_map); if (ret) return NULL; + rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */

rptr += page_offset * PAGE_SIZE; return rptr; @@ -212,7 +219,7 @@ void qxl_bo_kunmap(struct qxl_bo *bo) if (bo->map_count > 0) return; bo->kptr = NULL; - ttm_bo_kunmap(&bo->kmap); + ttm_bo_vunmap(&bo->tbo, &bo->map); }

void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h index 09a5c818324d..ebf24c9d2bf2 100644 --- a/drivers/gpu/drm/qxl/qxl_object.h +++ b/drivers/gpu/drm/qxl/qxl_object.h @@ -63,7 +63,7 @@ extern int qxl_bo_create(struct qxl_device *qdev, bool kernel, bool pinned, u32 domain, struct qxl_surface *surf, struct qxl_bo **bo_ptr); -extern int qxl_bo_kmap(struct qxl_bo *bo, void **ptr); +extern int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map); extern void qxl_bo_kunmap(struct qxl_bo *bo); void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, int page_offset); void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, void *map); diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c index 7d3816fca5a8..4aa949799446 100644 --- a/drivers/gpu/drm/qxl/qxl_prime.c +++ b/drivers/gpu/drm/qxl/qxl_prime.c @@ -54,20 +54,20 @@ struct drm_gem_object *qxl_gem_prime_import_sg_table( return ERR_PTR(-ENOSYS); }

-void *qxl_gem_prime_vmap(struct drm_gem_object *obj) +int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct qxl_bo *bo = gem_to_qxl_bo(obj); - void *ptr; int ret;

- ret = qxl_bo_kmap(bo, &ptr); + ret = qxl_bo_kmap(bo, map); if (ret < 0) - return ERR_PTR(ret); + return ret;

- return ptr; + return 0; }

-void qxl_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) +void qxl_gem_prime_vunmap(struct drm_gem_object *obj, + struct dma_buf_map *map) { struct qxl_bo *bo = gem_to_qxl_bo(obj);

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 5d54bccebd4d..44cb5ee6fc20 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -509,7 +509,6 @@ struct radeon_bo { /* Constant after initialization */ struct radeon_device *rdev;

- struct ttm_bo_kmap_obj dma_buf_vmap; pid_t pid;

#ifdef CONFIG_MMU_NOTIFIER diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c index 0ccd7213e41f..d2876ce3bc9e 100644 --- a/drivers/gpu/drm/radeon/radeon_gem.c +++ b/drivers/gpu/drm/radeon/radeon_gem.c @@ -31,6 +31,7 @@ #include <drm/drm_debugfs.h> #include <drm/drm_device.h> #include <drm/drm_file.h> +#include <drm/drm_gem_ttm_helper.h> #include <drm/radeon_drm.h>

#include "radeon.h" @@ -40,8 +41,6 @@ struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj, struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj); int radeon_gem_prime_pin(struct drm_gem_object *obj); void radeon_gem_prime_unpin(struct drm_gem_object *obj); -void *radeon_gem_prime_vmap(struct drm_gem_object *obj); -void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);

static const struct drm_gem_object_funcs radeon_gem_object_funcs;

@@ -235,8 +234,8 @@ static const struct drm_gem_object_funcs radeon_gem_object_funcs = { .pin = radeon_gem_prime_pin, .unpin = radeon_gem_prime_unpin, .get_sg_table = radeon_gem_prime_get_sg_table, - .vmap = radeon_gem_prime_vmap, - .vunmap = radeon_gem_prime_vunmap, + .vmap = drm_gem_ttm_vmap, + .vunmap = drm_gem_ttm_vunmap, };

/* diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c index b9de0e51c0be..088d39a51c0d 100644 --- a/drivers/gpu/drm/radeon/radeon_prime.c +++ b/drivers/gpu/drm/radeon/radeon_prime.c @@ -39,26 +39,6 @@ struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) return drm_prime_pages_to_sg(obj->dev, bo->tbo.ttm->pages, npages); }

-void *radeon_gem_prime_vmap(struct drm_gem_object *obj) -{ - struct radeon_bo *bo = gem_to_radeon_bo(obj); - int ret; - - ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, - &bo->dma_buf_vmap); - if (ret) - return ERR_PTR(ret); - - return bo->dma_buf_vmap.virtual; -} - -void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) -{ - struct radeon_bo *bo = gem_to_radeon_bo(obj); - - ttm_bo_kunmap(&bo->dma_buf_vmap); -} - struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sg) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index 7d5ebb10323b..7971f57436dd 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -532,26 +532,32 @@ rockchip_gem_prime_import_sg_table(struct drm_device *drm, return ERR_PTR(ret); }

-void *rockchip_gem_prime_vmap(struct drm_gem_object *obj) +int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);

- if (rk_obj->pages) - return vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP, - pgprot_writecombine(PAGE_KERNEL)); + if (rk_obj->pages) { + void *vaddr = vmap(rk_obj->pages, rk_obj->num_pages, VM_MAP, + pgprot_writecombine(PAGE_KERNEL)); + if (!vaddr) + return -ENOMEM; + dma_buf_map_set_vaddr(map, vaddr); + return 0; + }

if (rk_obj->dma_attrs & DMA_ATTR_NO_KERNEL_MAPPING) - return NULL; + return -ENOMEM; + dma_buf_map_set_vaddr(map, rk_obj->kvaddr);

- return rk_obj->kvaddr; + return 0; }

-void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) +void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);

if (rk_obj->pages) { - vunmap(vaddr); + vunmap(map->vaddr); return; }

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h index 7ffc541bea07..5a70a56cd406 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h @@ -31,8 +31,8 @@ struct drm_gem_object * rockchip_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sg); -void *rockchip_gem_prime_vmap(struct drm_gem_object *obj); -void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); +int rockchip_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map); +void rockchip_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);

/* drm driver mmap file operations */ int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma); diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c index 744a8e337e41..c02e35ed6e76 100644 --- a/drivers/gpu/drm/tiny/cirrus.c +++ b/drivers/gpu/drm/tiny/cirrus.c @@ -17,6 +17,7 @@ */

#include <linux/console.h> +#include <linux/dma-buf-map.h> #include <linux/module.h> #include <linux/pci.h>

@@ -314,6 +315,7 @@ static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, struct drm_rect *rect) { struct cirrus_device *cirrus = to_cirrus(fb->dev); + struct dma_buf_map map; void *vmap; int idx, ret;

@@ -321,10 +323,10 @@ static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, if (!drm_dev_enter(&cirrus->dev, &idx)) goto out;

- ret = -ENOMEM; - vmap = drm_gem_shmem_vmap(fb->obj[0]); - if (!vmap) + ret = drm_gem_shmem_vmap(fb->obj[0], &map); + if (ret) goto out_dev_exit; + vmap = map.vaddr; /* TODO: Use mapping abstraction properly */

if (cirrus->cpp == fb->format->cpp[0]) drm_fb_memcpy_dstclip(cirrus->vram, @@ -343,7 +345,7 @@ static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, else WARN_ON_ONCE("cpp mismatch");

- drm_gem_shmem_vunmap(fb->obj[0], vmap); + drm_gem_shmem_vunmap(fb->obj[0], &map); ret = 0;

out_dev_exit: diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c index cc397671f689..12a890cea6e9 100644 --- a/drivers/gpu/drm/tiny/gm12u320.c +++ b/drivers/gpu/drm/tiny/gm12u320.c @@ -248,6 +248,7 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320) { int block, dst_offset, len, remain, ret, x1, x2, y1, y2; struct drm_framebuffer *fb; + struct dma_buf_map map; void *vaddr; u8 *src;

@@ -262,11 +263,12 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320) y1 = gm12u320->fb_update.rect.y1; y2 = gm12u320->fb_update.rect.y2;

- vaddr = drm_gem_shmem_vmap(fb->obj[0]); - if (IS_ERR(vaddr)) { - GM12U320_ERR("failed to vmap fb: %ld\n", PTR_ERR(vaddr)); + ret = drm_gem_shmem_vmap(fb->obj[0], &map); + if (ret) { + GM12U320_ERR("failed to vmap fb: %d\n", ret); goto put_fb; } + vaddr = map.vaddr; /* TODO: Use mapping abstraction properly */

if (fb->obj[0]->import_attach) { ret = dma_buf_begin_cpu_access( @@ -318,7 +320,7 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320) GM12U320_ERR("dma_buf_end_cpu_access err: %d\n", ret); } vunmap: - drm_gem_shmem_vunmap(fb->obj[0], vaddr); + drm_gem_shmem_vunmap(fb->obj[0], &map); put_fb: drm_framebuffer_put(fb); gm12u320->fb_update.fb = NULL; diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c index fef43f4e3bac..42eeba1dfdbf 100644 --- a/drivers/gpu/drm/udl/udl_modeset.c +++ b/drivers/gpu/drm/udl/udl_modeset.c @@ -276,6 +276,7 @@ static int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, struct urb *urb; struct drm_rect clip; int log_bpp; + struct dma_buf_map map; void *vaddr;

ret = udl_log_cpp(fb->format->cpp[0]); @@ -296,11 +297,12 @@ static int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, return ret; }

- vaddr = drm_gem_shmem_vmap(fb->obj[0]); - if (IS_ERR(vaddr)) { + ret = drm_gem_shmem_vmap(fb->obj[0], &map); + if (ret) { DRM_ERROR("failed to vmap fb\n"); goto out_dma_buf_end_cpu_access; } + vaddr = map.vaddr; /* TODO: Use mapping abstraction properly */

urb = udl_get_urb(dev); if (!urb) @@ -333,7 +335,7 @@ static int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, ret = 0;

out_drm_gem_shmem_vunmap: - drm_gem_shmem_vunmap(fb->obj[0], vaddr); + drm_gem_shmem_vunmap(fb->obj[0], &map); out_dma_buf_end_cpu_access: if (import_attach) { tmp_ret = dma_buf_end_cpu_access(import_attach->dmabuf, diff --git a/drivers/gpu/drm/vboxvideo/vbox_mode.c b/drivers/gpu/drm/vboxvideo/vbox_mode.c index 931c55126148..f268fb258c83 100644 --- a/drivers/gpu/drm/vboxvideo/vbox_mode.c +++ b/drivers/gpu/drm/vboxvideo/vbox_mode.c @@ -9,6 +9,8 @@ * Michael Thayer <michael.thayer@oracle.com, * Hans de Goede hdegoede@redhat.com */ + +#include <linux/dma-buf-map.h> #include <linux/export.h>

#include <drm/drm_atomic.h> @@ -384,6 +386,8 @@ static void vbox_cursor_atomic_update(struct drm_plane *plane, u32 height = plane->state->crtc_h; size_t data_size, mask_size; u32 flags; + struct dma_buf_map map; + int ret; u8 *src;

/* @@ -397,8 +401,8 @@ static void vbox_cursor_atomic_update(struct drm_plane *plane,

vbox_crtc->cursor_enabled = true;

- src = drm_gem_vram_vmap(gbo); - if (IS_ERR(src)) { + ret = drm_gem_vram_vmap(gbo, &map); + if (ret) { /* * BUG: we should have pinned the BO in prepare_fb(). */ @@ -406,6 +410,7 @@ static void vbox_cursor_atomic_update(struct drm_plane *plane, DRM_WARN("Could not map cursor bo, skipping update\n"); return; } + src = map.vaddr; /* TODO: Use mapping abstraction properly */

/* * The mask must be calculated based on the alpha @@ -416,7 +421,7 @@ static void vbox_cursor_atomic_update(struct drm_plane *plane, data_size = width * height * 4 + mask_size;

copy_cursor_image(src, vbox->cursor_data, width, height, mask_size); - drm_gem_vram_vunmap(gbo, src); + drm_gem_vram_vunmap(gbo, &map);

flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE | VBOX_MOUSE_POINTER_ALPHA; diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c index 557f0d1e6437..f290a9a942dc 100644 --- a/drivers/gpu/drm/vc4/vc4_bo.c +++ b/drivers/gpu/drm/vc4/vc4_bo.c @@ -785,16 +785,16 @@ int vc4_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) return drm_gem_cma_prime_mmap(obj, vma); }

-void *vc4_prime_vmap(struct drm_gem_object *obj) +int vc4_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct vc4_bo *bo = to_vc4_bo(obj);

if (bo->validated_shader) { DRM_DEBUG("mmaping of shader BOs not allowed.\n"); - return ERR_PTR(-EINVAL); + return -EINVAL; }

- return drm_gem_cma_prime_vmap(obj); + return drm_gem_cma_prime_vmap(obj, map); }

struct drm_gem_object * diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h index 7003e7f14a48..b4409ead8f55 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -806,7 +806,7 @@ int vc4_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); struct drm_gem_object *vc4_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sgt); -void *vc4_prime_vmap(struct drm_gem_object *obj); +int vc4_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map); int vc4_bo_cache_init(struct drm_device *dev); void vc4_bo_cache_destroy(struct drm_device *dev); int vc4_bo_inc_usecnt(struct vc4_bo *bo); diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c index fa54a6d1403d..b2aa26e1e4a2 100644 --- a/drivers/gpu/drm/vgem/vgem_drv.c +++ b/drivers/gpu/drm/vgem/vgem_drv.c @@ -361,24 +361,30 @@ static struct drm_gem_object *vgem_prime_import_sg_table(struct drm_device *dev, return &obj->base; }

-static void *vgem_prime_vmap(struct drm_gem_object *obj) +static int vgem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct drm_vgem_gem_object *bo = to_vgem_bo(obj); long n_pages = obj->size >> PAGE_SHIFT; struct page **pages; + void *vaddr;

pages = vgem_pin_pages(bo); if (IS_ERR(pages)) - return NULL; + return PTR_ERR(pages); + + vaddr = vmap(pages, n_pages, 0, pgprot_writecombine(PAGE_KERNEL)); + if (!vaddr) + return -ENOMEM; + dma_buf_map_set_vaddr(map, vaddr);

- return vmap(pages, n_pages, 0, pgprot_writecombine(PAGE_KERNEL)); + return 0; }

-static void vgem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) +static void vgem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map) { struct drm_vgem_gem_object *bo = to_vgem_bo(obj);

- vunmap(vaddr); + vunmap(map->vaddr); vgem_unpin_pages(bo); }

diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c index 9890137bcb8d..0824327cc860 100644 --- a/drivers/gpu/drm/vkms/vkms_plane.c +++ b/drivers/gpu/drm/vkms/vkms_plane.c @@ -1,5 +1,7 @@ // SPDX-License-Identifier: GPL-2.0+

+#include <linux/dma-buf-map.h> + #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_fourcc.h> @@ -146,15 +148,16 @@ static int vkms_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state) { struct drm_gem_object *gem_obj; - void *vaddr; + struct dma_buf_map map; + int ret;

if (!state->fb) return 0;

gem_obj = drm_gem_fb_get_obj(state->fb, 0); - vaddr = drm_gem_shmem_vmap(gem_obj); - if (IS_ERR(vaddr)) - DRM_ERROR("vmap failed: %li\n", PTR_ERR(vaddr)); + ret = drm_gem_shmem_vmap(gem_obj, &map); + if (ret) + DRM_ERROR("vmap failed: %d\n", ret);

return drm_gem_fb_prepare_fb(plane, state); } @@ -164,13 +167,15 @@ static void vkms_cleanup_fb(struct drm_plane *plane, { struct drm_gem_object *gem_obj; struct drm_gem_shmem_object *shmem_obj; + struct dma_buf_map map;

if (!old_state->fb) return;

gem_obj = drm_gem_fb_get_obj(old_state->fb, 0); shmem_obj = to_drm_gem_shmem_obj(drm_gem_fb_get_obj(old_state->fb, 0)); - drm_gem_shmem_vunmap(gem_obj, shmem_obj->vaddr); + dma_buf_map_set_vaddr(&map, shmem_obj->vaddr); + drm_gem_shmem_vunmap(gem_obj, &map); }

static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = { diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c index 26b903926872..67f80ab1e85f 100644 --- a/drivers/gpu/drm/vkms/vkms_writeback.c +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0+

-#include "vkms_drv.h" +#include <linux/dma-buf-map.h> + #include <drm/drm_fourcc.h> #include <drm/drm_writeback.h> #include <drm/drm_probe_helper.h> @@ -8,6 +9,8 @@ #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_gem_shmem_helper.h>

+#include "vkms_drv.h" + static const u32 vkms_wb_formats[] = { DRM_FORMAT_XRGB8888, }; @@ -65,19 +68,20 @@ static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector, struct drm_writeback_job *job) { struct drm_gem_object *gem_obj; - void *vaddr; + struct dma_buf_map map; + int ret;

if (!job->fb) return 0;

gem_obj = drm_gem_fb_get_obj(job->fb, 0); - vaddr = drm_gem_shmem_vmap(gem_obj); - if (IS_ERR(vaddr)) { - DRM_ERROR("vmap failed: %li\n", PTR_ERR(vaddr)); - return PTR_ERR(vaddr); + ret = drm_gem_shmem_vmap(gem_obj, &map); + if (ret) { + DRM_ERROR("vmap failed: %d\n", ret); + return ret; }

- job->priv = vaddr; + job->priv = map.vaddr;

return 0; } @@ -87,12 +91,14 @@ static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector, { struct drm_gem_object *gem_obj; struct vkms_device *vkmsdev; + struct dma_buf_map map;

if (!job->fb) return;

gem_obj = drm_gem_fb_get_obj(job->fb, 0); - drm_gem_shmem_vunmap(gem_obj, job->priv); + dma_buf_map_set_vaddr(&map, job->priv); + drm_gem_shmem_vunmap(gem_obj, &map);

vkmsdev = drm_device_to_vkms_device(gem_obj->dev); vkms_set_composer(&vkmsdev->output, false); diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c b/drivers/gpu/drm/xen/xen_drm_front_gem.c index 4f34ef34ba60..74db5a840bed 100644 --- a/drivers/gpu/drm/xen/xen_drm_front_gem.c +++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c @@ -290,22 +290,28 @@ int xen_drm_front_gem_mmap(struct file *filp, struct vm_area_struct *vma) return gem_mmap_obj(xen_obj, vma); }

-void *xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj) +int xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj, struct dma_buf_map *map) { struct xen_gem_object *xen_obj = to_xen_gem_obj(gem_obj); + void *vaddr;

if (!xen_obj->pages) - return NULL; + return -ENOMEM;

/* Please see comment in gem_mmap_obj on mapping and attributes. */ - return vmap(xen_obj->pages, xen_obj->num_pages, - VM_MAP, PAGE_KERNEL); + vaddr = vmap(xen_obj->pages, xen_obj->num_pages, + VM_MAP, PAGE_KERNEL); + if (!vaddr) + return -ENOMEM; + dma_buf_map_set_vaddr(map, vaddr); + + return 0; }

void xen_drm_front_gem_prime_vunmap(struct drm_gem_object *gem_obj, - void *vaddr) + struct dma_buf_map *map) { - vunmap(vaddr); + vunmap(map->vaddr); }

int xen_drm_front_gem_prime_mmap(struct drm_gem_object *gem_obj, diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.h b/drivers/gpu/drm/xen/xen_drm_front_gem.h index a39675fa31b2..a4e67d0a149c 100644 --- a/drivers/gpu/drm/xen/xen_drm_front_gem.h +++ b/drivers/gpu/drm/xen/xen_drm_front_gem.h @@ -12,6 +12,7 @@ #define __XEN_DRM_FRONT_GEM_H

struct dma_buf_attachment; +struct dma_buf_map; struct drm_device; struct drm_gem_object; struct file; @@ -34,10 +35,11 @@ void xen_drm_front_gem_free_object_unlocked(struct drm_gem_object *gem_obj);

int xen_drm_front_gem_mmap(struct file *filp, struct vm_area_struct *vma);

-void *xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj); +int xen_drm_front_gem_prime_vmap(struct drm_gem_object *gem_obj, + struct dma_buf_map *map);

void xen_drm_front_gem_prime_vunmap(struct drm_gem_object *gem_obj, - void *vaddr); + struct dma_buf_map *map);

int xen_drm_front_gem_prime_mmap(struct drm_gem_object *gem_obj, struct vm_area_struct *vma); diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index c38dd35da00b..5e6daa1c982f 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -39,6 +39,7 @@

#include <drm/drm_vma_manager.h>

+struct dma_buf_map; struct drm_gem_object;

/** @@ -138,7 +139,7 @@ struct drm_gem_object_funcs { * * This callback is optional. */ - void *(*vmap)(struct drm_gem_object *obj); + int (*vmap)(struct drm_gem_object *obj, struct dma_buf_map *map);

/** * @vunmap: @@ -148,7 +149,7 @@ struct drm_gem_object_funcs { * * This callback is optional. */ - void (*vunmap)(struct drm_gem_object *obj, void *vaddr); + void (*vunmap)(struct drm_gem_object *obj, struct dma_buf_map *map);

/** * @mmap: diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h index a064b0d1c480..caf98b9cf4b4 100644 --- a/include/drm/drm_gem_cma_helper.h +++ b/include/drm/drm_gem_cma_helper.h @@ -103,7 +103,7 @@ drm_gem_cma_prime_import_sg_table(struct drm_device *dev, struct sg_table *sgt); int drm_gem_cma_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); -void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj); +int drm_gem_cma_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);

struct drm_gem_object * drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size); diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index 5381f0c8cf6f..3449a0353fe0 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -113,8 +113,8 @@ int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem); void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem); int drm_gem_shmem_pin(struct drm_gem_object *obj); void drm_gem_shmem_unpin(struct drm_gem_object *obj); -void *drm_gem_shmem_vmap(struct drm_gem_object *obj); -void drm_gem_shmem_vunmap(struct drm_gem_object *obj, void *vaddr); +int drm_gem_shmem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map); +void drm_gem_shmem_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);

int drm_gem_shmem_madvise(struct drm_gem_object *obj, int madv);

diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h index 128f88174d32..c0d28ba0f5c9 100644 --- a/include/drm/drm_gem_vram_helper.h +++ b/include/drm/drm_gem_vram_helper.h @@ -10,6 +10,7 @@ #include <drm/ttm/ttm_bo_api.h> #include <drm/ttm/ttm_bo_driver.h>

+#include <linux/dma-buf-map.h> #include <linux/kernel.h> /* for container_of() */

struct drm_mode_create_dumb; @@ -29,9 +30,8 @@ struct vm_area_struct;

/** * struct drm_gem_vram_object - GEM object backed by VRAM - * @gem: GEM object * @bo: TTM buffer object - * @kmap: Mapping information for @bo + * @map: Mapping information for @bo * @placement: TTM placement information. Supported placements are \ %TTM_PL_VRAM and %TTM_PL_SYSTEM * @placements: TTM placement information. @@ -50,15 +50,15 @@ struct vm_area_struct; */ struct drm_gem_vram_object { struct ttm_buffer_object bo; - struct ttm_bo_kmap_obj kmap; + struct dma_buf_map map;

/** - * @kmap_use_count: + * @vmap_use_count: * * Reference count on the virtual address. * The address are un-mapped when the count reaches zero. */ - unsigned int kmap_use_count; + unsigned int vmap_use_count;

/* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */ struct ttm_placement placement; @@ -97,8 +97,8 @@ u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo); s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo); int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag); int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo); -void *drm_gem_vram_vmap(struct drm_gem_vram_object *gbo); -void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, void *vaddr); +int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map); +void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo, struct dma_buf_map *map);

int drm_gem_vram_fill_create_dumb(struct drm_file *file, struct drm_device *dev,

Kernel DRM clients now store their framebuffer address in an instance of struct dma_buf_map. Depending on the buffer's location, the address refers to system or I/O memory.

Callers of drm_client_buffer_vmap() receive a copy of the value in the call's supplied arguments. It can be accessed and modified with dma_buf_map interfaces.

v6: * don't call page_to_phys() on framebuffers in I/O memory; warn instead (Daniel)

Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Reviewed-by: Daniel Vetter daniel.vetter@ffwll.ch Tested-by: Sam Ravnborg sam@ravnborg.org --- drivers/gpu/drm/drm_client.c | 34 +++++++++++++++++++-------------- drivers/gpu/drm/drm_fb_helper.c | 32 ++++++++++++++++++++----------- include/drm/drm_client.h | 7 ++++--- 3 files changed, 45 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c index ac0082bed966..fe573acf1067 100644 --- a/drivers/gpu/drm/drm_client.c +++ b/drivers/gpu/drm/drm_client.c @@ -235,7 +235,7 @@ static void drm_client_buffer_delete(struct drm_client_buffer *buffer) { struct drm_device *dev = buffer->client->dev;

- drm_gem_vunmap(buffer->gem, buffer->vaddr); + drm_gem_vunmap(buffer->gem, &buffer->map);

if (buffer->gem) drm_gem_object_put(buffer->gem); @@ -291,25 +291,31 @@ drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, u /** * drm_client_buffer_vmap - Map DRM client buffer into address space * @buffer: DRM client buffer + * @map_copy: Returns the mapped memory's address * * This function maps a client buffer into kernel address space. If the - * buffer is already mapped, it returns the mapping's address. + * buffer is already mapped, it returns the existing mapping's address. * * Client buffer mappings are not ref'counted. Each call to * drm_client_buffer_vmap() should be followed by a call to * drm_client_buffer_vunmap(); or the client buffer should be mapped * throughout its lifetime. * + * The returned address is a copy of the internal value. In contrast to + * other vmap interfaces, you don't need it for the client's vunmap + * function. So you can modify it at will during blit and draw operations. + * * Returns: - * The mapped memory's address + * 0 on success, or a negative errno code otherwise. */ -void *drm_client_buffer_vmap(struct drm_client_buffer *buffer) +int +drm_client_buffer_vmap(struct drm_client_buffer *buffer, struct dma_buf_map *map_copy) { - struct dma_buf_map map; + struct dma_buf_map *map = &buffer->map; int ret;

- if (buffer->vaddr) - return buffer->vaddr; + if (dma_buf_map_is_set(map)) + goto out;

/* * FIXME: The dependency on GEM here isn't required, we could @@ -319,13 +325,14 @@ void *drm_client_buffer_vmap(struct drm_client_buffer *buffer) * fd_install step out of the driver backend hooks, to make that * final step optional for internal users. */ - ret = drm_gem_vmap(buffer->gem, &map); + ret = drm_gem_vmap(buffer->gem, map); if (ret) - return ERR_PTR(ret); + return ret;

- buffer->vaddr = map.vaddr; +out: + *map_copy = *map;

- return map.vaddr; + return 0; } EXPORT_SYMBOL(drm_client_buffer_vmap);

@@ -339,10 +346,9 @@ EXPORT_SYMBOL(drm_client_buffer_vmap); */ void drm_client_buffer_vunmap(struct drm_client_buffer *buffer) { - struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(buffer->vaddr); + struct dma_buf_map *map = &buffer->map;

- drm_gem_vunmap(buffer->gem, &map); - buffer->vaddr = NULL; + drm_gem_vunmap(buffer->gem, map); } EXPORT_SYMBOL(drm_client_buffer_vunmap);

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 92e0db30fdf7..a0d88130fedb 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -378,7 +378,7 @@ static void drm_fb_helper_dirty_blit_real(struct drm_fb_helper *fb_helper, unsigned int cpp = fb->format->cpp[0]; size_t offset = clip->y1 * fb->pitches[0] + clip->x1 * cpp; void *src = fb_helper->fbdev->screen_buffer + offset; - void *dst = fb_helper->buffer->vaddr + offset; + void *dst = fb_helper->buffer->map.vaddr + offset; size_t len = (clip->x2 - clip->x1) * cpp; unsigned int y;

@@ -400,7 +400,8 @@ static void drm_fb_helper_dirty_work(struct work_struct *work) struct drm_clip_rect *clip = &helper->dirty_clip; struct drm_clip_rect clip_copy; unsigned long flags; - void *vaddr; + struct dma_buf_map map; + int ret;

spin_lock_irqsave(&helper->dirty_lock, flags); clip_copy = *clip; @@ -413,8 +414,8 @@ static void drm_fb_helper_dirty_work(struct work_struct *work)

/* Generic fbdev uses a shadow buffer */ if (helper->buffer) { - vaddr = drm_client_buffer_vmap(helper->buffer); - if (IS_ERR(vaddr)) + ret = drm_client_buffer_vmap(helper->buffer, &map); + if (ret) return; drm_fb_helper_dirty_blit_real(helper, &clip_copy); } @@ -2060,7 +2061,8 @@ static int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper, struct drm_framebuffer *fb; struct fb_info *fbi; u32 format; - void *vaddr; + struct dma_buf_map map; + int ret;

drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n", sizes->surface_width, sizes->surface_height, @@ -2096,14 +2098,22 @@ static int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper, fb_deferred_io_init(fbi); } else { /* buffer is mapped for HW framebuffer */ - vaddr = drm_client_buffer_vmap(fb_helper->buffer); - if (IS_ERR(vaddr)) - return PTR_ERR(vaddr); + ret = drm_client_buffer_vmap(fb_helper->buffer, &map); + if (ret) + return ret; + if (map.is_iomem) + fbi->screen_base = map.vaddr_iomem; + else + fbi->screen_buffer = map.vaddr;

- fbi->screen_buffer = vaddr; - /* Shamelessly leak the physical address to user-space */ + /* + * Shamelessly leak the physical address to user-space. As + * page_to_phys() is undefined for I/O memory, warn in this + * case. + */ #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) - if (drm_leak_fbdev_smem && fbi->fix.smem_start == 0) + if (drm_leak_fbdev_smem && fbi->fix.smem_start == 0 && + !drm_WARN_ON_ONCE(dev, map.is_iomem)) fbi->fix.smem_start = page_to_phys(virt_to_page(fbi->screen_buffer)); #endif diff --git a/include/drm/drm_client.h b/include/drm/drm_client.h index 7aaea665bfc2..f07f2fb02e75 100644 --- a/include/drm/drm_client.h +++ b/include/drm/drm_client.h @@ -3,6 +3,7 @@ #ifndef _DRM_CLIENT_H_ #define _DRM_CLIENT_H_

+#include <linux/dma-buf-map.h> #include <linux/lockdep.h> #include <linux/mutex.h> #include <linux/types.h> @@ -141,9 +142,9 @@ struct drm_client_buffer { struct drm_gem_object *gem;

/** - * @vaddr: Virtual address for the buffer + * @map: Virtual address for the buffer */ - void *vaddr; + struct dma_buf_map map;

/** * @fb: DRM framebuffer @@ -155,7 +156,7 @@ struct drm_client_buffer * drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format); void drm_client_framebuffer_delete(struct drm_client_buffer *buffer); int drm_client_framebuffer_flush(struct drm_client_buffer *buffer, struct drm_rect *rect); -void *drm_client_buffer_vmap(struct drm_client_buffer *buffer); +int drm_client_buffer_vmap(struct drm_client_buffer *buffer, struct dma_buf_map *map); void drm_client_buffer_vunmap(struct drm_client_buffer *buffer);

int drm_client_modeset_create(struct drm_client_dev *client);

At least sparc64 requires I/O-specific access to framebuffers. This patch updates the fbdev console accordingly.

For drivers with direct access to the framebuffer memory, the callback functions in struct fb_ops test for the type of memory and call the rsp fb_sys_ of fb_cfb_ functions. Read and write operations are implemented internally by DRM's fbdev helper.

For drivers that employ a shadow buffer, fbdev's blit function retrieves the framebuffer address as struct dma_buf_map, and uses dma_buf_map interfaces to access the buffer.

The bochs driver on sparc64 uses a workaround to flag the framebuffer as I/O memory and avoid a HW exception. With the introduction of struct dma_buf_map, this is not required any longer. The patch removes the rsp code from both, bochs and fbdev.

v7: * use min_t(size_t,) (kernel test robot) * return the number of bytes read/written, if any (fbdev testcase) v5: * implement fb_read/fb_write internally (Daniel, Sam) v4: * move dma_buf_map changes into separate patch (Daniel) * TODO list: comment on fbdev updates (Daniel)

Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Reviewed-by: Daniel Vetter daniel.vetter@ffwll.ch Reviewed-by: Sam Ravnborg sam@ravnborg.org Tested-by: Sam Ravnborg sam@ravnborg.org --- Documentation/gpu/todo.rst | 19 ++- drivers/gpu/drm/bochs/bochs_kms.c | 1 - drivers/gpu/drm/drm_fb_helper.c | 220 ++++++++++++++++++++++++++++-- include/drm/drm_mode_config.h | 12 -- 4 files changed, 223 insertions(+), 29 deletions(-)

diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index 59f63f1d7680..acca232b025b 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -201,13 +201,28 @@ Convert drivers to use drm_fbdev_generic_setup() ------------------------------------------------

Most drivers can use drm_fbdev_generic_setup(). Driver have to implement -atomic modesetting and GEM vmap support. Current generic fbdev emulation -expects the framebuffer in system memory (or system-like memory). +atomic modesetting and GEM vmap support. Historically, generic fbdev emulation +expected the framebuffer in system memory or system-like memory. By employing +struct dma_buf_map, drivers with frambuffers in I/O memory can be supported +as well.

Contact: Maintainer of the driver you plan to convert

Level: Intermediate

+Reimplement functions in drm_fbdev_fb_ops without fbdev +------------------------------------------------------- + +A number of callback functions in drm_fbdev_fb_ops could benefit from +being rewritten without dependencies on the fbdev module. Some of the +helpers could further benefit from using struct dma_buf_map instead of +raw pointers. + +Contact: Thomas Zimmermann tzimmermann@suse.de, Daniel Vetter + +Level: Advanced + + drm_framebuffer_funcs and drm_mode_config_funcs.fb_create cleanup -----------------------------------------------------------------

diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c index 13d0d04c4457..853081d186d5 100644 --- a/drivers/gpu/drm/bochs/bochs_kms.c +++ b/drivers/gpu/drm/bochs/bochs_kms.c @@ -151,7 +151,6 @@ int bochs_kms_init(struct bochs_device *bochs) bochs->dev->mode_config.preferred_depth = 24; bochs->dev->mode_config.prefer_shadow = 0; bochs->dev->mode_config.prefer_shadow_fbdev = 1; - bochs->dev->mode_config.fbdev_use_iomem = true; bochs->dev->mode_config.quirk_addfb_prefer_host_byte_order = true;

bochs->dev->mode_config.funcs = &bochs_mode_funcs; diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index a0d88130fedb..01ba1da28511 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -372,24 +372,22 @@ static void drm_fb_helper_resume_worker(struct work_struct *work) }

static void drm_fb_helper_dirty_blit_real(struct drm_fb_helper *fb_helper, - struct drm_clip_rect *clip) + struct drm_clip_rect *clip, + struct dma_buf_map *dst) { struct drm_framebuffer *fb = fb_helper->fb; unsigned int cpp = fb->format->cpp[0]; size_t offset = clip->y1 * fb->pitches[0] + clip->x1 * cpp; void *src = fb_helper->fbdev->screen_buffer + offset; - void *dst = fb_helper->buffer->map.vaddr + offset; size_t len = (clip->x2 - clip->x1) * cpp; unsigned int y;

- for (y = clip->y1; y < clip->y2; y++) { - if (!fb_helper->dev->mode_config.fbdev_use_iomem) - memcpy(dst, src, len); - else - memcpy_toio((void __iomem *)dst, src, len); + dma_buf_map_incr(dst, offset); /* go to first pixel within clip rect */

+ for (y = clip->y1; y < clip->y2; y++) { + dma_buf_map_memcpy_to(dst, src, len); + dma_buf_map_incr(dst, fb->pitches[0]); src += fb->pitches[0]; - dst += fb->pitches[0]; } }

@@ -417,8 +415,9 @@ static void drm_fb_helper_dirty_work(struct work_struct *work) ret = drm_client_buffer_vmap(helper->buffer, &map); if (ret) return; - drm_fb_helper_dirty_blit_real(helper, &clip_copy); + drm_fb_helper_dirty_blit_real(helper, &clip_copy, &map); } + if (helper->fb->funcs->dirty) helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); @@ -2027,6 +2026,199 @@ static int drm_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) return -ENODEV; }

+static bool drm_fbdev_use_iomem(struct fb_info *info) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_client_buffer *buffer = fb_helper->buffer; + + return !drm_fbdev_use_shadow_fb(fb_helper) && buffer->map.is_iomem; +} + +static ssize_t fb_read_screen_base(struct fb_info *info, char __user *buf, size_t count, + loff_t pos) +{ + const char __iomem *src = info->screen_base + pos; + size_t alloc_size = min(count, PAGE_SIZE); + ssize_t ret = 0; + int err = 0; + char *tmp; + + tmp = kmalloc(alloc_size, GFP_KERNEL); + if (!tmp) + return -ENOMEM; + + while (count) { + size_t c = min_t(size_t, count, alloc_size); + + memcpy_fromio(tmp, src, c); + if (copy_to_user(buf, tmp, c)) { + err = -EFAULT; + break; + } + + src += c; + buf += c; + ret += c; + count -= c; + } + + kfree(tmp); + + return ret ? ret : err; +} + +static ssize_t fb_read_screen_buffer(struct fb_info *info, char __user *buf, size_t count, + loff_t pos) +{ + const char *src = info->screen_buffer + pos; + + if (copy_to_user(buf, src, count)) + return -EFAULT; + + return count; +} + +static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, + size_t count, loff_t *ppos) +{ + loff_t pos = *ppos; + size_t total_size; + ssize_t ret; + + if (info->screen_size) + total_size = info->screen_size; + else + total_size = info->fix.smem_len; + + if (pos >= total_size) + return 0; + if (count >= total_size) + count = total_size; + if (total_size - count < pos) + count = total_size - pos; + + if (drm_fbdev_use_iomem(info)) + ret = fb_read_screen_base(info, buf, count, pos); + else + ret = fb_read_screen_buffer(info, buf, count, pos); + + if (ret > 0) + *ppos += ret; + + return ret; +} + +static ssize_t fb_write_screen_base(struct fb_info *info, const char __user *buf, size_t count, + loff_t pos) +{ + char __iomem *dst = info->screen_base + pos; + size_t alloc_size = min(count, PAGE_SIZE); + ssize_t ret = 0; + int err = 0; + u8 *tmp; + + tmp = kmalloc(alloc_size, GFP_KERNEL); + if (!tmp) + return -ENOMEM; + + while (count) { + size_t c = min_t(size_t, count, alloc_size); + + if (copy_from_user(tmp, buf, c)) { + err = -EFAULT; + break; + } + memcpy_toio(dst, tmp, c); + + dst += c; + buf += c; + ret += c; + count -= c; + } + + kfree(tmp); + + return ret ? ret : err; +} + +static ssize_t fb_write_screen_buffer(struct fb_info *info, const char __user *buf, size_t count, + loff_t pos) +{ + char *dst = info->screen_buffer + pos; + + if (copy_from_user(dst, buf, count)) + return -EFAULT; + + return count; +} + +static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos) +{ + loff_t pos = *ppos; + size_t total_size; + ssize_t ret; + int err = 0; + + if (info->screen_size) + total_size = info->screen_size; + else + total_size = info->fix.smem_len; + + if (pos > total_size) + return -EFBIG; + if (count > total_size) { + err = -EFBIG; + count = total_size; + } + if (total_size - count < pos) { + if (!err) + err = -ENOSPC; + count = total_size - pos; + } + + /* + * Copy to framebuffer even if we already logged an error. Emulates + * the behavior of the original fbdev implementation. + */ + if (drm_fbdev_use_iomem(info)) + ret = fb_write_screen_base(info, buf, count, pos); + else + ret = fb_write_screen_buffer(info, buf, count, pos); + + if (ret > 0) + *ppos += ret; + + return ret ? ret : err; +} + +static void drm_fbdev_fb_fillrect(struct fb_info *info, + const struct fb_fillrect *rect) +{ + if (drm_fbdev_use_iomem(info)) + drm_fb_helper_cfb_fillrect(info, rect); + else + drm_fb_helper_sys_fillrect(info, rect); +} + +static void drm_fbdev_fb_copyarea(struct fb_info *info, + const struct fb_copyarea *area) +{ + if (drm_fbdev_use_iomem(info)) + drm_fb_helper_cfb_copyarea(info, area); + else + drm_fb_helper_sys_copyarea(info, area); +} + +static void drm_fbdev_fb_imageblit(struct fb_info *info, + const struct fb_image *image) +{ + if (drm_fbdev_use_iomem(info)) + drm_fb_helper_cfb_imageblit(info, image); + else + drm_fb_helper_sys_imageblit(info, image); +} + static const struct fb_ops drm_fbdev_fb_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, @@ -2034,11 +2226,11 @@ static const struct fb_ops drm_fbdev_fb_ops = { .fb_release = drm_fbdev_fb_release, .fb_destroy = drm_fbdev_fb_destroy, .fb_mmap = drm_fbdev_fb_mmap, - .fb_read = drm_fb_helper_sys_read, - .fb_write = drm_fb_helper_sys_write, - .fb_fillrect = drm_fb_helper_sys_fillrect, - .fb_copyarea = drm_fb_helper_sys_copyarea, - .fb_imageblit = drm_fb_helper_sys_imageblit, + .fb_read = drm_fbdev_fb_read, + .fb_write = drm_fbdev_fb_write, + .fb_fillrect = drm_fbdev_fb_fillrect, + .fb_copyarea = drm_fbdev_fb_copyarea, + .fb_imageblit = drm_fbdev_fb_imageblit, };

static struct fb_deferred_io drm_fbdev_defio = { diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index 5ffbb4ed5b35..ab424ddd7665 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -877,18 +877,6 @@ struct drm_mode_config { */ bool prefer_shadow_fbdev;

- /** - * @fbdev_use_iomem: - * - * Set to true if framebuffer reside in iomem. - * When set to true memcpy_toio() is used when copying the framebuffer in - * drm_fb_helper.drm_fb_helper_dirty_blit_real(). - * - * FIXME: This should be replaced with a per-mapping is_iomem - * flag (like ttm does), and then used everywhere in fbdev code. - */ - bool fbdev_use_iomem; - /** * @quirk_addfb_prefer_xbgr_30bpp: *