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intel-gtt: generic (insert|remove)_entries for i830 

Well, not all too generic because it does not yet support dmar.
Add a new function check_flags to ensure that non-gem code does
not try to screw us over.

v2: Beautify i830_check_flags with an idea from Chris Wilson.

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 21:31:04 +02:00 committed by Chris Wilson
parent a87aa5cc00
commit 5cbecafce4
1 changed files with 28 additions and 25 deletions
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53
drivers/char/agp/intel-gtt.c
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@ -94,6 +94,7 @@ struct intel_gtt_driver {
/* Flags is a more or less chipset specific opaque value.
* For chipsets that need to support old ums (non-gem) code, this
* needs to be identical to the various supported agp memory types! */
bool (*check_flags)(unsigned int flags);
};
static struct _intel_private {
@ -1037,20 +1038,28 @@ static int intel_fake_agp_configure(void)
return 0;
}
static int intel_i830_insert_entries(struct agp_memory *mem, off_t pg_start,
int type)
static bool i830_check_flags(unsigned int flags)
{
int i, j, num_entries;
void *temp;
switch (flags) {
case 0:
case AGP_PHYS_MEMORY:
case AGP_USER_CACHED_MEMORY:
case AGP_USER_MEMORY:
return true;
}
return false;
}
static int intel_fake_agp_insert_entries(struct agp_memory *mem,
off_t pg_start, int type)
{
int i, j;
int ret = -EINVAL;
int mask_type;
if (mem->page_count == 0)
goto out;
temp = agp_bridge->current_size;
num_entries = A_SIZE_FIX(temp)->num_entries;
if (pg_start < intel_private.base.gtt_stolen_entries) {
dev_printk(KERN_DEBUG, &intel_private.pcidev->dev,
"pg_start == 0x%.8lx, gtt_stolen_entries == 0x%.8x\n",
@ -1061,29 +1070,21 @@ static int intel_i830_insert_entries(struct agp_memory *mem, off_t pg_start,
goto out_err;
}
if ((pg_start + mem->page_count) > num_entries)
if ((pg_start + mem->page_count) > intel_private.base.gtt_total_entries)
goto out_err;
/* The i830 can't check the GTT for entries since its read only,
* depend on the caller to make the correct offset decisions.
*/
if (type != mem->type)
goto out_err;
mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type);
if (mask_type != 0 && mask_type != AGP_PHYS_MEMORY &&
mask_type != INTEL_AGP_CACHED_MEMORY)
if (!intel_private.driver->check_flags(type))
goto out_err;
if (!mem->is_flushed)
global_cache_flush();
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
writel(agp_bridge->driver->mask_memory(agp_bridge,
page_to_phys(mem->pages[i]), mask_type),
intel_private.gtt+j);
intel_private.driver->write_entry(page_to_phys(mem->pages[i]),
j, type);
}
readl(intel_private.gtt+j-1);
@ -1094,8 +1095,8 @@ static int intel_i830_insert_entries(struct agp_memory *mem, off_t pg_start,
return ret;
}
static int intel_i830_remove_entries(struct agp_memory *mem, off_t pg_start,
int type)
static int intel_fake_agp_remove_entries(struct agp_memory *mem,
off_t pg_start, int type)
{
int i;
@ -1109,7 +1110,8 @@ static int intel_i830_remove_entries(struct agp_memory *mem, off_t pg_start,
}
for (i = pg_start; i < (mem->page_count + pg_start); i++) {
writel(agp_bridge->scratch_page, intel_private.gtt+i);
intel_private.driver->write_entry(intel_private.scratch_page_dma,
i, 0);
}
readl(intel_private.gtt+i-1);
@ -1441,8 +1443,8 @@ static const struct agp_bridge_driver intel_830_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_i830_insert_entries,
.remove_memory = intel_i830_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,
@ -1577,6 +1579,7 @@ static const struct intel_gtt_driver i8xx_gtt_driver = {
.gen = 2,
.setup = i830_setup,
.write_entry = i830_write_entry,
.check_flags = i830_check_flags,
};
static const struct intel_gtt_driver i915_gtt_driver = {
.gen = 3,