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intel-gtt: generic (insert|remove)_entries for i915

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Beef up the generic version to support dmar. Otherwise like for the i830.

v2: Don't try to DMA remap on resume for already remapped pages.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Daniel Vetter 2010-09-11 22:12:11 +02:00 committed by Chris Wilson
parent 5cbecafce4
commit fefaa70f0c
1 changed files with 49 additions and 11 deletions
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60
drivers/char/agp/intel-gtt.c
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@ -124,7 +124,6 @@ static struct _intel_private {
#define IS_PINEVIEW intel_private.driver->is_pineview
#define IS_IRONLAKE intel_private.driver->is_ironlake
#if USE_PCI_DMA_API
static void intel_agp_free_sglist(struct agp_memory *mem)
{
struct sg_table st;
@ -144,6 +143,9 @@ static int intel_agp_map_memory(struct agp_memory *mem)
struct scatterlist *sg;
int i;
if (mem->sg_list)
return 0; /* already mapped (for e.g. resume */
DBG("try mapping %lu pages\n", (unsigned long)mem->page_count);
if (sg_alloc_table(&st, mem->page_count, GFP_KERNEL))
@ -175,6 +177,7 @@ static void intel_agp_unmap_memory(struct agp_memory *mem)
intel_agp_free_sglist(mem);
}
#if USE_PCI_DMA_API
static void intel_agp_insert_sg_entries(struct agp_memory *mem,
off_t pg_start, int mask_type)
{
@ -1051,6 +1054,31 @@ static bool i830_check_flags(unsigned int flags)
return false;
}
static void intel_gtt_insert_sg_entries(struct scatterlist *sg_list,
unsigned int sg_len,
unsigned int pg_start,
unsigned int flags)
{
struct scatterlist *sg;
unsigned int len, m;
int i, j;
j = pg_start;
/* sg may merge pages, but we have to separate
* per-page addr for GTT */
for_each_sg(sg_list, sg, sg_len, i) {
len = sg_dma_len(sg) >> PAGE_SHIFT;
for (m = 0; m < len; m++) {
dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT);
intel_private.driver->write_entry(addr,
j, flags);
j++;
}
}
readl(intel_private.gtt+j-1);
}
static int intel_fake_agp_insert_entries(struct agp_memory *mem,
off_t pg_start, int type)
{
@ -1082,11 +1110,21 @@ static int intel_fake_agp_insert_entries(struct agp_memory *mem,
if (!mem->is_flushed)
global_cache_flush();
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
intel_private.driver->write_entry(page_to_phys(mem->pages[i]),
j, type);
if (USE_PCI_DMA_API && INTEL_GTT_GEN > 2) {
ret = intel_agp_map_memory(mem);
if (ret != 0)
return ret;
intel_gtt_insert_sg_entries(mem->sg_list, mem->num_sg,
pg_start, type);
} else {
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
dma_addr_t addr = page_to_phys(mem->pages[i]);
intel_private.driver->write_entry(addr,
j, type);
}
readl(intel_private.gtt+j-1);
}
readl(intel_private.gtt+j-1);
out:
ret = 0;
@ -1109,6 +1147,9 @@ static int intel_fake_agp_remove_entries(struct agp_memory *mem,
return -EINVAL;
}
if (USE_PCI_DMA_API && INTEL_GTT_GEN > 2)
intel_agp_unmap_memory(mem);
for (i = pg_start; i < (mem->page_count + pg_start); i++) {
intel_private.driver->write_entry(intel_private.scratch_page_dma,
i, 0);
@ -1469,8 +1510,8 @@ static const struct agp_bridge_driver intel_915_driver = {
.cache_flush = global_cache_flush,
.create_gatt_table = intel_fake_agp_create_gatt_table,
.free_gatt_table = intel_fake_agp_free_gatt_table,
.insert_memory = intel_i915_insert_entries,
.remove_memory = intel_i915_remove_entries,
.insert_memory = intel_fake_agp_insert_entries,
.remove_memory = intel_fake_agp_remove_entries,
.alloc_by_type = intel_fake_agp_alloc_by_type,
.free_by_type = intel_i810_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
@ -1479,10 +1520,6 @@ static const struct agp_bridge_driver intel_915_driver = {
.agp_destroy_pages = agp_generic_destroy_pages,
.agp_type_to_mask_type = intel_i830_type_to_mask_type,
.chipset_flush = intel_i915_chipset_flush,
#if USE_PCI_DMA_API
.agp_map_memory = intel_agp_map_memory,
.agp_unmap_memory = intel_agp_unmap_memory,
#endif
};
static const struct agp_bridge_driver intel_i965_driver = {
@ -1586,6 +1623,7 @@ static const struct intel_gtt_driver i915_gtt_driver = {
.setup = i9xx_setup,
/* i945 is the last gpu to need phys mem (for overlay and cursors). */
.write_entry = i830_write_entry,
.check_flags = i830_check_flags,
};
static const struct intel_gtt_driver g33_gtt_driver = {
.gen = 3,