drm: Clean up many sparse warnings in i915.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 6ecfd10..6a89449 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -176,7 +176,8 @@
ssize_t remain;
loff_t offset;
char __user *user_data;
- char *vaddr;
+ char __iomem *vaddr;
+ char *vaddr_atomic;
int i, o, l;
int ret = 0;
unsigned long pfn;
@@ -219,16 +220,20 @@
pfn = (dev->agp->base >> PAGE_SHIFT) + i;
#ifdef CONFIG_HIGHMEM
- /* kmap_atomic can't map IO pages on non-HIGHMEM kernels
+ /* This is a workaround for the low performance of iounmap
+ * (approximate 10% cpu cost on normal 3D workloads).
+ * kmap_atomic on HIGHMEM kernels happens to let us map card
+ * memory without taking IPIs. When the vmap rework lands
+ * we should be able to dump this hack.
*/
- vaddr = kmap_atomic_pfn(pfn, KM_USER0);
+ vaddr_atomic = kmap_atomic_pfn(pfn, KM_USER0);
#if WATCH_PWRITE
DRM_INFO("pwrite i %d o %d l %d pfn %ld vaddr %p\n",
- i, o, l, pfn, vaddr);
+ i, o, l, pfn, vaddr_atomic);
#endif
- unwritten = __copy_from_user_inatomic_nocache(vaddr + o,
+ unwritten = __copy_from_user_inatomic_nocache(vaddr_atomic + o,
user_data, l);
- kunmap_atomic(vaddr, KM_USER0);
+ kunmap_atomic(vaddr_atomic, KM_USER0);
if (unwritten)
#endif /* CONFIG_HIGHMEM */
@@ -271,7 +276,7 @@
return ret;
}
-int
+static int
i915_gem_shmem_pwrite(struct drm_device *dev, struct drm_gem_object *obj,
struct drm_i915_gem_pwrite *args,
struct drm_file *file_priv)
@@ -587,7 +592,7 @@
* Ensures that all commands in the ring are finished
* before signalling the CPU
*/
-uint32_t
+static uint32_t
i915_retire_commands(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
@@ -734,7 +739,7 @@
* Waits for a sequence number to be signaled, and cleans up the
* request and object lists appropriately for that event.
*/
-int
+static int
i915_wait_request(struct drm_device *dev, uint32_t seqno)
{
drm_i915_private_t *dev_priv = dev->dev_private;
@@ -1483,7 +1488,7 @@
struct drm_i915_gem_object *obj_priv = obj->driver_private;
int i, ret;
uint32_t last_reloc_offset = -1;
- void *reloc_page = NULL;
+ void __iomem *reloc_page = NULL;
/* Choose the GTT offset for our buffer and put it there. */
ret = i915_gem_object_pin(obj, (uint32_t) entry->alignment);
@@ -1500,8 +1505,8 @@
for (i = 0; i < entry->relocation_count; i++) {
struct drm_gem_object *target_obj;
struct drm_i915_gem_object *target_obj_priv;
- uint32_t reloc_val, reloc_offset, *reloc_entry;
- int ret;
+ uint32_t reloc_val, reloc_offset;
+ uint32_t __iomem *reloc_entry;
ret = copy_from_user(&reloc, relocs + i, sizeof(reloc));
if (ret != 0) {
@@ -1624,7 +1629,7 @@
}
}
- reloc_entry = (uint32_t *)((char *)reloc_page +
+ reloc_entry = (uint32_t __iomem *)(reloc_page +
(reloc_offset & (PAGE_SIZE - 1)));
reloc_val = target_obj_priv->gtt_offset + reloc.delta;