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author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-02 20:42:15 +0000 |
---|---|---|
committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-03 11:26:01 +0000 |
commit | 6056e50033d9f840bc1e35cac794b13144710a25 (patch) | |
tree | 0317da85ff43ee4a400fbe1bbb9f0e12b18779b1 /drivers/gpu | |
parent | 1d0e2c9359fec6212af8c5fb29d5d56269f96968 (diff) | |
download | linux-stable-6056e50033d9f840bc1e35cac794b13144710a25.tar.gz linux-stable-6056e50033d9f840bc1e35cac794b13144710a25.tar.bz2 linux-stable-6056e50033d9f840bc1e35cac794b13144710a25.zip |
drm/i915/gem: Support discontiguous lmem object maps
Create a vmap for discontinguous lmem objects to support
i915_gem_object_pin_map().
v2: Offset io address by region.start for fake-lmem
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200102204215.1519103-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu')
-rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 40 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_lmem.h | 8 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_pages.c | 79 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/gem/selftests/huge_pages.c | 41 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/selftests/intel_memory_region.c | 33 |
5 files changed, 78 insertions, 123 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c index 520cc9cac471..70543c83df06 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c @@ -16,46 +16,6 @@ const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops = { .release = i915_gem_object_release_memory_region, }; -/* XXX: Time to vfunc your life up? */ -void __iomem * -i915_gem_object_lmem_io_map_page(struct drm_i915_gem_object *obj, - unsigned long n) -{ - resource_size_t offset; - - offset = i915_gem_object_get_dma_address(obj, n); - offset -= obj->mm.region->region.start; - - return io_mapping_map_wc(&obj->mm.region->iomap, offset, PAGE_SIZE); -} - -void __iomem * -i915_gem_object_lmem_io_map_page_atomic(struct drm_i915_gem_object *obj, - unsigned long n) -{ - resource_size_t offset; - - offset = i915_gem_object_get_dma_address(obj, n); - offset -= obj->mm.region->region.start; - - return io_mapping_map_atomic_wc(&obj->mm.region->iomap, offset); -} - -void __iomem * -i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj, - unsigned long n, - unsigned long size) -{ - resource_size_t offset; - - GEM_BUG_ON(!i915_gem_object_is_contiguous(obj)); - - offset = i915_gem_object_get_dma_address(obj, n); - offset -= obj->mm.region->region.start; - - return io_mapping_map_wc(&obj->mm.region->iomap, offset, size); -} - bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj) { return obj->ops == &i915_gem_lmem_obj_ops; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.h b/drivers/gpu/drm/i915/gem/i915_gem_lmem.h index 7c176b8b7d2f..fc3f15580fe3 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.h @@ -14,14 +14,6 @@ struct intel_memory_region; extern const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops; -void __iomem *i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj, - unsigned long n, unsigned long size); -void __iomem *i915_gem_object_lmem_io_map_page(struct drm_i915_gem_object *obj, - unsigned long n); -void __iomem * -i915_gem_object_lmem_io_map_page_atomic(struct drm_i915_gem_object *obj, - unsigned long n); - bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj); struct drm_i915_gem_object * diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c index 75197ca696a8..54aca5c9101e 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c @@ -158,9 +158,7 @@ static void __i915_gem_object_reset_page_iter(struct drm_i915_gem_object *obj) static void unmap_object(struct drm_i915_gem_object *obj, void *ptr) { - if (i915_gem_object_is_lmem(obj)) - io_mapping_unmap((void __force __iomem *)ptr); - else if (is_vmalloc_addr(ptr)) + if (is_vmalloc_addr(ptr)) vunmap(ptr); else kunmap(kmap_to_page(ptr)); @@ -236,46 +234,44 @@ unlock: return err; } +static inline pte_t iomap_pte(resource_size_t base, + dma_addr_t offset, + pgprot_t prot) +{ + return pte_mkspecial(pfn_pte((base + offset) >> PAGE_SHIFT, prot)); +} + /* The 'mapping' part of i915_gem_object_pin_map() below */ static void *i915_gem_object_map(struct drm_i915_gem_object *obj, enum i915_map_type type) { - unsigned long n_pages = obj->base.size >> PAGE_SHIFT; + unsigned long n_pte = obj->base.size >> PAGE_SHIFT; struct sg_table *sgt = obj->mm.pages; - struct sgt_iter sgt_iter; - struct page *page; - struct page *stack_pages[32]; - struct page **pages = stack_pages; - unsigned long i = 0; + pte_t *stack[32], **mem; + struct vm_struct *area; pgprot_t pgprot; - void *addr; - if (i915_gem_object_is_lmem(obj)) { - void __iomem *io; - - if (type != I915_MAP_WC) - return NULL; - - io = i915_gem_object_lmem_io_map(obj, 0, obj->base.size); - return (void __force *)io; - } + if (!i915_gem_object_has_struct_page(obj) && type != I915_MAP_WC) + return NULL; /* A single page can always be kmapped */ - if (n_pages == 1 && type == I915_MAP_WB) + if (n_pte == 1 && type == I915_MAP_WB) return kmap(sg_page(sgt->sgl)); - if (n_pages > ARRAY_SIZE(stack_pages)) { + mem = stack; + if (n_pte > ARRAY_SIZE(stack)) { /* Too big for stack -- allocate temporary array instead */ - pages = kvmalloc_array(n_pages, sizeof(*pages), GFP_KERNEL); - if (!pages) + mem = kvmalloc_array(n_pte, sizeof(*mem), GFP_KERNEL); + if (!mem) return NULL; } - for_each_sgt_page(page, sgt_iter, sgt) - pages[i++] = page; - - /* Check that we have the expected number of pages */ - GEM_BUG_ON(i != n_pages); + area = alloc_vm_area(obj->base.size, mem); + if (!area) { + if (mem != stack) + kvfree(mem); + return NULL; + } switch (type) { default: @@ -288,12 +284,31 @@ static void *i915_gem_object_map(struct drm_i915_gem_object *obj, pgprot = pgprot_writecombine(PAGE_KERNEL_IO); break; } - addr = vmap(pages, n_pages, 0, pgprot); - if (pages != stack_pages) - kvfree(pages); + if (i915_gem_object_has_struct_page(obj)) { + struct sgt_iter iter; + struct page *page; + pte_t **ptes = mem; + + for_each_sgt_page(page, iter, sgt) + **ptes++ = mk_pte(page, pgprot); + } else { + resource_size_t iomap; + struct sgt_iter iter; + pte_t **ptes = mem; + dma_addr_t addr; + + iomap = obj->mm.region->iomap.base; + iomap -= obj->mm.region->region.start; + + for_each_sgt_daddr(addr, iter, sgt) + **ptes++ = iomap_pte(iomap, addr, pgprot); + } + + if (mem != stack) + kvfree(mem); - return addr; + return area->addr; } /* get, pin, and map the pages of the object into kernel space */ diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c index 2479395c1873..249a4d24d678 100644 --- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c +++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c @@ -1017,38 +1017,33 @@ __cpu_check_shmem(struct drm_i915_gem_object *obj, u32 dword, u32 val) return err; } -static int __cpu_check_lmem(struct drm_i915_gem_object *obj, u32 dword, u32 val) +static int __cpu_check_vmap(struct drm_i915_gem_object *obj, u32 dword, u32 val) { - unsigned long n; + unsigned long n = obj->base.size >> PAGE_SHIFT; + u32 *ptr; int err; - i915_gem_object_lock(obj); - err = i915_gem_object_set_to_wc_domain(obj, false); - i915_gem_object_unlock(obj); - if (err) - return err; - - err = i915_gem_object_pin_pages(obj); + err = i915_gem_object_wait(obj, 0, MAX_SCHEDULE_TIMEOUT); if (err) return err; - for (n = 0; n < obj->base.size >> PAGE_SHIFT; ++n) { - u32 __iomem *base; - u32 read_val; - - base = i915_gem_object_lmem_io_map_page_atomic(obj, n); + ptr = i915_gem_object_pin_map(obj, I915_MAP_WC); + if (IS_ERR(ptr)) + return PTR_ERR(ptr); - read_val = ioread32(base + dword); - io_mapping_unmap_atomic(base); - if (read_val != val) { - pr_err("n=%lu base[%u]=%u, val=%u\n", - n, dword, read_val, val); + ptr += dword; + while (n--) { + if (*ptr != val) { + pr_err("base[%u]=%08x, val=%08x\n", + dword, *ptr, val); err = -EINVAL; break; } + + ptr += PAGE_SIZE / sizeof(*ptr); } - i915_gem_object_unpin_pages(obj); + i915_gem_object_unpin_map(obj); return err; } @@ -1056,10 +1051,8 @@ static int cpu_check(struct drm_i915_gem_object *obj, u32 dword, u32 val) { if (i915_gem_object_has_struct_page(obj)) return __cpu_check_shmem(obj, dword, val); - else if (i915_gem_object_is_lmem(obj)) - return __cpu_check_lmem(obj, dword, val); - - return -ENODEV; + else + return __cpu_check_vmap(obj, dword, val); } static int __igt_write_huge(struct intel_context *ce, diff --git a/drivers/gpu/drm/i915/selftests/intel_memory_region.c b/drivers/gpu/drm/i915/selftests/intel_memory_region.c index 04d0aa7b349e..3ef3620e0da5 100644 --- a/drivers/gpu/drm/i915/selftests/intel_memory_region.c +++ b/drivers/gpu/drm/i915/selftests/intel_memory_region.c @@ -270,36 +270,31 @@ static int igt_gpu_write_dw(struct intel_context *ce, static int igt_cpu_check(struct drm_i915_gem_object *obj, u32 dword, u32 val) { - unsigned long n; + unsigned long n = obj->base.size >> PAGE_SHIFT; + u32 *ptr; int err; - i915_gem_object_lock(obj); - err = i915_gem_object_set_to_wc_domain(obj, false); - i915_gem_object_unlock(obj); - if (err) - return err; - - err = i915_gem_object_pin_pages(obj); + err = i915_gem_object_wait(obj, 0, MAX_SCHEDULE_TIMEOUT); if (err) return err; - for (n = 0; n < obj->base.size >> PAGE_SHIFT; ++n) { - u32 __iomem *base; - u32 read_val; - - base = i915_gem_object_lmem_io_map_page_atomic(obj, n); + ptr = i915_gem_object_pin_map(obj, I915_MAP_WC); + if (IS_ERR(ptr)) + return PTR_ERR(ptr); - read_val = ioread32(base + dword); - io_mapping_unmap_atomic(base); - if (read_val != val) { - pr_err("n=%lu base[%u]=%u, val=%u\n", - n, dword, read_val, val); + ptr += dword; + while (n--) { + if (*ptr != val) { + pr_err("base[%u]=%08x, val=%08x\n", + dword, *ptr, val); err = -EINVAL; break; } + + ptr += PAGE_SIZE / sizeof(*ptr); } - i915_gem_object_unpin_pages(obj); + i915_gem_object_unpin_map(obj); return err; } |