On Wed, Apr 24, 2019 at 01:48:32PM +0200, Thomas Zimmermann wrote: > The data structure |struct drm_vram_mm| and its helpers replace ast's > TTM-based memory manager. It's the same implementation; except for the > type names. > > v2: > * implement ast_mmap() with drm_vram_mm_mmap() > > Signed-off-by: Thomas Zimmermann <[email protected]> > --- > drivers/gpu/drm/ast/Kconfig | 1 + > drivers/gpu/drm/ast/ast_drv.h | 12 +--- > drivers/gpu/drm/ast/ast_main.c | 4 +- > drivers/gpu/drm/ast/ast_ttm.c | 123 +++------------------------------ > 4 files changed, 14 insertions(+), 126 deletions(-) > > diff --git a/drivers/gpu/drm/ast/Kconfig b/drivers/gpu/drm/ast/Kconfig > index d1d90f8c7a8f..ecc9c905b81b 100644 > --- a/drivers/gpu/drm/ast/Kconfig > +++ b/drivers/gpu/drm/ast/Kconfig > @@ -4,6 +4,7 @@ config DRM_AST > select DRM_TTM > select DRM_KMS_HELPER > select DRM_GEM_VRAM_HELPER > + select DRM_VRAM_MM_HELPER > help > Say yes for experimental AST GPU driver. Do not enable > this driver without having a working -modesetting, > diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h > index 712838f725dc..8fee400f5c41 100644 > --- a/drivers/gpu/drm/ast/ast_drv.h > +++ b/drivers/gpu/drm/ast/ast_drv.h > @@ -31,15 +31,11 @@ > #include <drm/drm_encoder.h> > #include <drm/drm_fb_helper.h> > > -#include <drm/ttm/ttm_bo_api.h> > -#include <drm/ttm/ttm_bo_driver.h> > -#include <drm/ttm/ttm_placement.h> > -#include <drm/ttm/ttm_memory.h> > -#include <drm/ttm/ttm_module.h> > - > #include <drm/drm_gem.h> > #include <drm/drm_gem_vram_helper.h> > > +#include <drm/drm_vram_mm_helper.h> > + > #include <linux/i2c.h> > #include <linux/i2c-algo-bit.h> > > @@ -104,9 +100,7 @@ struct ast_private { > > int fb_mtrr; > > - struct { > - struct ttm_bo_device bdev; > - } ttm; > + struct drm_vram_mm vmm; > > struct drm_gem_object *cursor_cache; > uint64_t cursor_cache_gpu_addr; > diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c > index 61fc7b8ea470..92510251fe25 100644 > --- a/drivers/gpu/drm/ast/ast_main.c > +++ b/drivers/gpu/drm/ast/ast_main.c > @@ -603,7 +603,7 @@ int ast_gem_create(struct drm_device *dev, > if (size == 0) > return -EINVAL; > > - gbo = drm_gem_vram_create(dev, &ast->ttm.bdev, size, 0, false); > + gbo = drm_gem_vram_create(dev, &ast->vmm.bdev, size, 0, false); > if (IS_ERR(gbo)) { > ret = PTR_ERR(gbo); > if (ret != -ERESTARTSYS) > @@ -620,6 +620,6 @@ int ast_dumb_create(struct drm_file *file, > { > struct ast_private *ast = dev->dev_private; > > - return drm_gem_vram_fill_create_dumb(file, dev, &ast->ttm.bdev, 0, > + return drm_gem_vram_fill_create_dumb(file, dev, &ast->vmm.bdev, 0, > false, args);
I think storing the vram mm somewhere in drm_device would be nice, so that we can avoid all these trivial wrappers. Similar to how we store drm_device->dev already, so that cma helpers just work. Next to object_name_idr and vma_offset_manager, so it's at least grouped together. Also with that you create an _OPS macro like for CMA helpers, to condense boilerplat even more. -Daniel > } > diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_ttm.c > index 794ebb755a5d..78032327b64b 100644 > --- a/drivers/gpu/drm/ast/ast_ttm.c > +++ b/drivers/gpu/drm/ast/ast_ttm.c > @@ -26,131 +26,24 @@ > * Authors: Dave Airlie <[email protected]> > */ > #include <drm/drmP.h> > -#include <drm/ttm/ttm_page_alloc.h> > > #include "ast_drv.h" > > -static inline struct ast_private * > -ast_bdev(struct ttm_bo_device *bd) > -{ > - return container_of(bd, struct ast_private, ttm.bdev); > -} > - > -static int > -ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, > - struct ttm_mem_type_manager *man) > -{ > - switch (type) { > - case TTM_PL_SYSTEM: > - man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; > - man->available_caching = TTM_PL_MASK_CACHING; > - man->default_caching = TTM_PL_FLAG_CACHED; > - break; > - case TTM_PL_VRAM: > - man->func = &ttm_bo_manager_func; > - man->flags = TTM_MEMTYPE_FLAG_FIXED | > - TTM_MEMTYPE_FLAG_MAPPABLE; > - man->available_caching = TTM_PL_FLAG_UNCACHED | > - TTM_PL_FLAG_WC; > - man->default_caching = TTM_PL_FLAG_WC; > - break; > - default: > - DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); > - return -EINVAL; > - } > - return 0; > -} > - > -static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev, > - struct ttm_mem_reg *mem) > -{ > - struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; > - struct ast_private *ast = ast_bdev(bdev); > - > - mem->bus.addr = NULL; > - mem->bus.offset = 0; > - mem->bus.size = mem->num_pages << PAGE_SHIFT; > - mem->bus.base = 0; > - mem->bus.is_iomem = false; > - if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) > - return -EINVAL; > - switch (mem->mem_type) { > - case TTM_PL_SYSTEM: > - /* system memory */ > - return 0; > - case TTM_PL_VRAM: > - mem->bus.offset = mem->start << PAGE_SHIFT; > - mem->bus.base = pci_resource_start(ast->dev->pdev, 0); > - mem->bus.is_iomem = true; > - break; > - default: > - return -EINVAL; > - break; > - } > - return 0; > -} > - > -static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct > ttm_mem_reg *mem) > -{ > -} > - > -static void ast_ttm_backend_destroy(struct ttm_tt *tt) > -{ > - ttm_tt_fini(tt); > - kfree(tt); > -} > - > -static struct ttm_backend_func ast_tt_backend_func = { > - .destroy = &ast_ttm_backend_destroy, > -}; > - > - > -static struct ttm_tt *ast_ttm_tt_create(struct ttm_buffer_object *bo, > - uint32_t page_flags) > -{ > - struct ttm_tt *tt; > - > - tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL); > - if (tt == NULL) > - return NULL; > - tt->func = &ast_tt_backend_func; > - if (ttm_tt_init(tt, bo, page_flags)) { > - kfree(tt); > - return NULL; > - } > - return tt; > -} > - > -struct ttm_bo_driver ast_bo_driver = { > - .ttm_tt_create = ast_ttm_tt_create, > - .init_mem_type = ast_bo_init_mem_type, > - .eviction_valuable = ttm_bo_eviction_valuable, > +static const struct drm_vram_mm_funcs ast_vram_mm_funcs = { > .evict_flags = drm_gem_vram_bo_driver_evict_flags, > - .move = NULL, > - .verify_access = drm_gem_vram_bo_driver_verify_access, > - .io_mem_reserve = &ast_ttm_io_mem_reserve, > - .io_mem_free = &ast_ttm_io_mem_free, > + .verify_access = drm_gem_vram_bo_driver_verify_access > }; > > int ast_mm_init(struct ast_private *ast) > { > int ret; > struct drm_device *dev = ast->dev; > - struct ttm_bo_device *bdev = &ast->ttm.bdev; > - > - ret = ttm_bo_device_init(&ast->ttm.bdev, > - &ast_bo_driver, > - dev->anon_inode->i_mapping, > - true); > - if (ret) { > - DRM_ERROR("Error initialising bo driver; %d\n", ret); > - return ret; > - } > > - ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, > - ast->vram_size >> PAGE_SHIFT); > + ret = drm_vram_mm_init(&ast->vmm, dev, > + pci_resource_start(dev->pdev, 0), > + ast->vram_size, &ast_vram_mm_funcs); > if (ret) { > - DRM_ERROR("Failed ttm VRAM init: %d\n", ret); > + DRM_ERROR("Error initializing VRAM MM; %d\n", ret); > return ret; > } > > @@ -166,7 +59,7 @@ void ast_mm_fini(struct ast_private *ast) > { > struct drm_device *dev = ast->dev; > > - ttm_bo_device_release(&ast->ttm.bdev); > + drm_vram_mm_cleanup(&ast->vmm); > > arch_phys_wc_del(ast->fb_mtrr); > arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0), > @@ -178,5 +71,5 @@ int ast_mmap(struct file *filp, struct vm_area_struct *vma) > struct drm_file *file_priv = filp->private_data; > struct ast_private *ast = file_priv->minor->dev->dev_private; > > - return ttm_bo_mmap(filp, vma, &ast->ttm.bdev); > + return drm_vram_mm_mmap(filp, vma, &ast->vmm); > } > -- > 2.21.0 > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
