diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gem/i915_gem_pages.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_pages.c | 163 |
1 files changed, 142 insertions, 21 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c index ecd86130b74f..c2f8e5f95696 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c @@ -1,13 +1,18 @@ +// SPDX-License-Identifier: MIT /* - * SPDX-License-Identifier: MIT - * * Copyright © 2014-2016 Intel Corporation */ +#include <linux/vmalloc.h> + #include <drm/drm_cache.h> +#include <drm/drm_panic.h> +#include <drm/drm_print.h> +#include "display/intel_fb.h" +#include "display/intel_display_types.h" #include "gt/intel_gt.h" -#include "gt/intel_gt_pm.h" +#include "gt/intel_tlb.h" #include "i915_drv.h" #include "i915_gem_object.h" @@ -193,13 +198,16 @@ static void unmap_object(struct drm_i915_gem_object *obj, void *ptr) static void flush_tlb_invalidate(struct drm_i915_gem_object *obj) { struct drm_i915_private *i915 = to_i915(obj->base.dev); - struct intel_gt *gt = to_gt(i915); + struct intel_gt *gt; + int id; - if (!obj->mm.tlb) - return; + for_each_gt(gt, i915, id) { + if (!obj->mm.tlb[id]) + continue; - intel_gt_invalidate_tlb(gt, obj->mm.tlb); - obj->mm.tlb = 0; + intel_gt_invalidate_tlb_full(gt, obj->mm.tlb[id]); + obj->mm.tlb[id] = 0; + } } struct sg_table * @@ -351,6 +359,131 @@ static void *i915_gem_object_map_pfn(struct drm_i915_gem_object *obj, return vaddr ?: ERR_PTR(-ENOMEM); } +struct intel_panic { + struct page **pages; + int page; + void *vaddr; +}; + +static void i915_panic_kunmap(struct intel_panic *panic) +{ + if (panic->vaddr) { + drm_clflush_virt_range(panic->vaddr, PAGE_SIZE); + kunmap_local(panic->vaddr); + panic->vaddr = NULL; + } +} + +static struct page **i915_gem_object_panic_pages(struct drm_i915_gem_object *obj) +{ + unsigned long n_pages = obj->base.size >> PAGE_SHIFT, i; + struct page *page; + struct page **pages; + struct sgt_iter iter; + + /* For a 3840x2160 32 bits Framebuffer, this should require ~64K */ + pages = kmalloc_array(n_pages, sizeof(*pages), GFP_ATOMIC); + if (!pages) + return NULL; + + i = 0; + for_each_sgt_page(page, iter, obj->mm.pages) + pages[i++] = page; + return pages; +} + +static void i915_gem_object_panic_map_set_pixel(struct drm_scanout_buffer *sb, unsigned int x, + unsigned int y, u32 color) +{ + struct intel_framebuffer *fb = (struct intel_framebuffer *)sb->private; + unsigned int offset = fb->panic_tiling(sb->width, x, y); + + iosys_map_wr(&sb->map[0], offset, u32, color); +} + +/* + * The scanout buffer pages are not mapped, so for each pixel, + * use kmap_local_page_try_from_panic() to map the page, and write the pixel. + * Try to keep the map from the previous pixel, to avoid too much map/unmap. + */ +static void i915_gem_object_panic_page_set_pixel(struct drm_scanout_buffer *sb, unsigned int x, + unsigned int y, u32 color) +{ + unsigned int new_page; + unsigned int offset; + struct intel_framebuffer *fb = (struct intel_framebuffer *)sb->private; + struct intel_panic *panic = fb->panic; + + if (fb->panic_tiling) + offset = fb->panic_tiling(sb->width, x, y); + else + offset = y * sb->pitch[0] + x * sb->format->cpp[0]; + + new_page = offset >> PAGE_SHIFT; + offset = offset % PAGE_SIZE; + if (new_page != panic->page) { + i915_panic_kunmap(panic); + panic->page = new_page; + panic->vaddr = + kmap_local_page_try_from_panic(panic->pages[panic->page]); + } + if (panic->vaddr) { + u32 *pix = panic->vaddr + offset; + *pix = color; + } +} + +struct intel_panic *i915_gem_object_alloc_panic(void) +{ + struct intel_panic *panic; + + panic = kzalloc(sizeof(*panic), GFP_KERNEL); + + return panic; +} + +/* + * Setup the gem framebuffer for drm_panic access. + * Use current vaddr if it exists, or setup a list of pages. + * pfn is not supported yet. + */ +int i915_gem_object_panic_setup(struct intel_panic *panic, struct drm_scanout_buffer *sb, + struct drm_gem_object *_obj, bool panic_tiling) +{ + enum i915_map_type has_type; + struct drm_i915_gem_object *obj = to_intel_bo(_obj); + void *ptr; + + ptr = page_unpack_bits(obj->mm.mapping, &has_type); + if (ptr) { + if (i915_gem_object_has_iomem(obj)) + iosys_map_set_vaddr_iomem(&sb->map[0], (void __iomem *)ptr); + else + iosys_map_set_vaddr(&sb->map[0], ptr); + + if (panic_tiling) + sb->set_pixel = i915_gem_object_panic_map_set_pixel; + return 0; + } + if (i915_gem_object_has_struct_page(obj)) { + panic->pages = i915_gem_object_panic_pages(obj); + if (!panic->pages) + return -ENOMEM; + panic->page = -1; + sb->set_pixel = i915_gem_object_panic_page_set_pixel; + return 0; + } + return -EOPNOTSUPP; +} + +void i915_gem_object_panic_finish(struct intel_panic *panic) +{ + i915_panic_kunmap(panic); + panic->page = -1; + kfree(panic->pages); + panic->pages = NULL; +} + /* get, pin, and map the pages of the object into kernel space */ void *i915_gem_object_pin_map(struct drm_i915_gem_object *obj, enum i915_map_type type) @@ -465,18 +598,6 @@ void *i915_gem_object_pin_map_unlocked(struct drm_i915_gem_object *obj, return ret; } -enum i915_map_type i915_coherent_map_type(struct drm_i915_private *i915, - struct drm_i915_gem_object *obj, - bool always_coherent) -{ - if (i915_gem_object_is_lmem(obj)) - return I915_MAP_WC; - if (HAS_LLC(i915) || always_coherent) - return I915_MAP_WB; - else - return I915_MAP_WC; -} - void __i915_gem_object_flush_map(struct drm_i915_gem_object *obj, unsigned long offset, unsigned long size) @@ -646,7 +767,7 @@ __i915_gem_object_get_page(struct drm_i915_gem_object *obj, pgoff_t n) GEM_BUG_ON(!i915_gem_object_has_struct_page(obj)); sg = i915_gem_object_get_sg(obj, n, &offset); - return nth_page(sg_page(sg), offset); + return sg_page(sg) + offset; } /* Like i915_gem_object_get_page(), but mark the returned page dirty */ |