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Subject[PATCH 08/13] drm/i915: kill ranged cpu read domain support
Date
No longer needed.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/i915_drv.h | 7 --
drivers/gpu/drm/i915/i915_gem.c | 117 ---------------------------------------
2 files changed, 0 insertions(+), 124 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 25036f5..fe4b680 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -861,13 +861,6 @@ struct drm_i915_gem_object {
/** Record of address bit 17 of each page at last unbind. */
unsigned long *bit_17;

-
- /**
- * If present, while GEM_DOMAIN_CPU is in the read domain this array
- * flags which individual pages are valid.
- */
- uint8_t *page_cpu_valid;
-
/** User space pin count and filp owning the pin */
uint32_t user_pin_count;
struct drm_file *pin_filp;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0e9cc81..0048917 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -41,10 +41,6 @@ static void i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *o
static void i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj);
static __must_check int i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj,
bool write);
-static __must_check int i915_gem_object_set_cpu_read_domain_range(struct drm_i915_gem_object *obj,
- uint64_t offset,
- uint64_t size);
-static void i915_gem_object_set_to_full_cpu_read_domain(struct drm_i915_gem_object *obj);
static __must_check int i915_gem_object_bind_to_gtt(struct drm_i915_gem_object *obj,
unsigned alignment,
bool map_and_fenceable);
@@ -2964,11 +2960,6 @@ i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write)

i915_gem_object_flush_gtt_write_domain(obj);

- /* If we have a partially-valid cache of the object in the CPU,
- * finish invalidating it and free the per-page flags.
- */
- i915_gem_object_set_to_full_cpu_read_domain(obj);
-
old_write_domain = obj->base.write_domain;
old_read_domains = obj->base.read_domains;

@@ -2999,113 +2990,6 @@ i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write)
return 0;
}

-/**
- * Moves the object from a partially CPU read to a full one.
- *
- * Note that this only resolves i915_gem_object_set_cpu_read_domain_range(),
- * and doesn't handle transitioning from !(read_domains & I915_GEM_DOMAIN_CPU).
- */
-static void
-i915_gem_object_set_to_full_cpu_read_domain(struct drm_i915_gem_object *obj)
-{
- if (!obj->page_cpu_valid)
- return;
-
- /* If we're partially in the CPU read domain, finish moving it in.
- */
- if (obj->base.read_domains & I915_GEM_DOMAIN_CPU) {
- int i;
-
- for (i = 0; i <= (obj->base.size - 1) / PAGE_SIZE; i++) {
- if (obj->page_cpu_valid[i])
- continue;
- drm_clflush_pages(obj->pages + i, 1);
- }
- }
-
- /* Free the page_cpu_valid mappings which are now stale, whether
- * or not we've got I915_GEM_DOMAIN_CPU.
- */
- kfree(obj->page_cpu_valid);
- obj->page_cpu_valid = NULL;
-}
-
-/**
- * Set the CPU read domain on a range of the object.
- *
- * The object ends up with I915_GEM_DOMAIN_CPU in its read flags although it's
- * not entirely valid. The page_cpu_valid member of the object flags which
- * pages have been flushed, and will be respected by
- * i915_gem_object_set_to_cpu_domain() if it's called on to get a valid mapping
- * of the whole object.
- *
- * This function returns when the move is complete, including waiting on
- * flushes to occur.
- */
-static int
-i915_gem_object_set_cpu_read_domain_range(struct drm_i915_gem_object *obj,
- uint64_t offset, uint64_t size)
-{
- uint32_t old_read_domains;
- int i, ret;
-
- if (offset == 0 && size == obj->base.size)
- return i915_gem_object_set_to_cpu_domain(obj, 0);
-
- ret = i915_gem_object_flush_gpu_write_domain(obj);
- if (ret)
- return ret;
-
- ret = i915_gem_object_wait_rendering(obj);
- if (ret)
- return ret;
-
- i915_gem_object_flush_gtt_write_domain(obj);
-
- /* If we're already fully in the CPU read domain, we're done. */
- if (obj->page_cpu_valid == NULL &&
- (obj->base.read_domains & I915_GEM_DOMAIN_CPU) != 0)
- return 0;
-
- /* Otherwise, create/clear the per-page CPU read domain flag if we're
- * newly adding I915_GEM_DOMAIN_CPU
- */
- if (obj->page_cpu_valid == NULL) {
- obj->page_cpu_valid = kzalloc(obj->base.size / PAGE_SIZE,
- GFP_KERNEL);
- if (obj->page_cpu_valid == NULL)
- return -ENOMEM;
- } else if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0)
- memset(obj->page_cpu_valid, 0, obj->base.size / PAGE_SIZE);
-
- /* Flush the cache on any pages that are still invalid from the CPU's
- * perspective.
- */
- for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE;
- i++) {
- if (obj->page_cpu_valid[i])
- continue;
-
- drm_clflush_pages(obj->pages + i, 1);
-
- obj->page_cpu_valid[i] = 1;
- }
-
- /* It should now be out of any other write domains, and we can update
- * the domain values for our changes.
- */
- BUG_ON((obj->base.write_domain & ~I915_GEM_DOMAIN_CPU) != 0);
-
- old_read_domains = obj->base.read_domains;
- obj->base.read_domains |= I915_GEM_DOMAIN_CPU;
-
- trace_i915_gem_object_change_domain(obj,
- old_read_domains,
- obj->base.write_domain);
-
- return 0;
-}
-
/* Throttle our rendering by waiting until the ring has completed our requests
* emitted over 20 msec ago.
*
@@ -3521,7 +3405,6 @@ static void i915_gem_free_object_tail(struct drm_i915_gem_object *obj)
drm_gem_object_release(&obj->base);
i915_gem_info_remove_obj(dev_priv, obj->base.size);

- kfree(obj->page_cpu_valid);
kfree(obj->bit_17);
kfree(obj);
}
--
1.7.6.4


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