[patch 1/2] agpgart - allow user-populated memory types.

From: Thomas Hellström
Date: Fri Dec 08 2006 - 13:25:48 EST

This patch allows drm to populate an agpgart structure with pages of its own.
It's needed for the new drm memory manager which dynamically flips pages in and out of AGP.

The patch modifies the generic functions as well as the intel agp driver. The intel drm driver is
currently the only one supporting the new memory manager.

Other agp drivers may need some minor fixing up once they have a corresponding memory manager enabled drm driver.

AGP memory types >= AGP_USER_TYPES are not populated by the agpgart driver, but the drm is expected to do that, as well as taking care of cache- and tlb flushing when needed.

It's not possible to request these types from user space using agpgart ioctls.

The intel driver also gets a new memory type for pages that can be bound cached to the intel GTT.

Patch against davej's agpgart.git

/Thomas Hellström

diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index 8b3317f..8abbbda 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -114,6 +114,7 @@ struct agp_bridge_driver {
void (*free_by_type)(struct agp_memory *);
void *(*agp_alloc_page)(struct agp_bridge_data *);
void (*agp_destroy_page)(void *);
+ int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);
};

struct agp_bridge_data {
@@ -218,6 +219,7 @@ #define I810_PTE_BASE 0x10000
#define I810_PTE_MAIN_UNCACHED 0x00000000
#define I810_PTE_LOCAL 0x00000002
#define I810_PTE_VALID 0x00000001
+#define I830_PTE_SYSTEM_CACHED 0x00000006
#define I810_SMRAM_MISCC 0x70
#define I810_GFX_MEM_WIN_SIZE 0x00010000
#define I810_GFX_MEM_WIN_32M 0x00010000
@@ -266,8 +268,14 @@ void global_cache_flush(void);
void get_agp_version(struct agp_bridge_data *bridge);
unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge,
unsigned long addr, int type);
+int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge,
+ int type);
struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev);

+/* generic functions for user-populated AGP memory types */
+struct agp_memory *agp_generic_alloc_user(size_t page_count, int type);
+void agp_generic_free_user(struct agp_memory *curr);
+
/* generic routines for agp>=3 */
int agp3_generic_fetch_size(void);
void agp3_generic_tlbflush(struct agp_memory *mem);
diff --git a/drivers/char/agp/ali-agp.c b/drivers/char/agp/ali-agp.c
index 5a31ec7..98177a9 100644
--- a/drivers/char/agp/ali-agp.c
+++ b/drivers/char/agp/ali-agp.c
@@ -214,6 +214,7 @@ static struct agp_bridge_driver ali_gene
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = ali_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver ali_m1541_bridge = {
@@ -237,6 +238,7 @@ static struct agp_bridge_driver ali_m154
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = m1541_alloc_page,
.agp_destroy_page = m1541_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};


diff --git a/drivers/char/agp/alpha-agp.c b/drivers/char/agp/alpha-agp.c
index b4e00a3..b0acf41 100644
--- a/drivers/char/agp/alpha-agp.c
+++ b/drivers/char/agp/alpha-agp.c
@@ -91,6 +91,9 @@ static int alpha_core_agp_insert_memory(
int num_entries, status;
void *temp;

+ if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES)
+ return -EINVAL;
+
temp = agp_bridge->current_size;
num_entries = A_SIZE_FIX(temp)->num_entries;
if ((pg_start + mem->page_count) > num_entries)
@@ -142,6 +145,7 @@ struct agp_bridge_driver alpha_core_agp_
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

struct agp_bridge_data *alpha_bridge;
diff --git a/drivers/char/agp/amd-k7-agp.c b/drivers/char/agp/amd-k7-agp.c
index 51d0d56..9c129bd 100644
--- a/drivers/char/agp/amd-k7-agp.c
+++ b/drivers/char/agp/amd-k7-agp.c
@@ -376,6 +376,7 @@ static struct agp_bridge_driver amd_iron
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_device_ids amd_agp_device_ids[] __devinitdata =
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 00b17ae..ac24340 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -62,12 +62,18 @@ static int amd64_insert_memory(struct ag
{
int i, j, num_entries;
long long tmp;
+ int mask_type;
+ struct agp_bridge_data *bridge = mem->bridge;
u32 pte;

num_entries = agp_num_entries();

- if (type != 0 || mem->type != 0)
+ if (type != mem->type)
return -EINVAL;
+ mask_type = bridge->driver->agp_type_to_mask_type(bridge, type);
+ if (mask_type != 0)
+ return -EINVAL;
+

/* Make sure we can fit the range in the gatt table. */
/* FIXME: could wrap */
@@ -90,7 +96,7 @@ static int amd64_insert_memory(struct ag

for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
tmp = agp_bridge->driver->mask_memory(agp_bridge,
- mem->memory[i], mem->type);
+ mem->memory[i], mask_type);

BUG_ON(tmp & 0xffffff0000000ffcULL);
pte = (tmp & 0x000000ff00000000ULL) >> 28;
@@ -247,6 +253,7 @@ static struct agp_bridge_driver amd_8151
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

/* Some basic sanity checks for the aperture. */
diff --git a/drivers/char/agp/ati-agp.c b/drivers/char/agp/ati-agp.c
index f244c66..d4f7b75 100644
--- a/drivers/char/agp/ati-agp.c
+++ b/drivers/char/agp/ati-agp.c
@@ -431,6 +431,7 @@ static struct agp_bridge_driver ati_gene
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};


diff --git a/drivers/char/agp/efficeon-agp.c b/drivers/char/agp/efficeon-agp.c
index 30f730f..658cb1a 100644
--- a/drivers/char/agp/efficeon-agp.c
+++ b/drivers/char/agp/efficeon-agp.c
@@ -335,6 +335,7 @@ static struct agp_bridge_driver efficeon
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static int __devinit agp_efficeon_probe(struct pci_dev *pdev,
diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c
index 0f2ed2a..e21a319 100644
--- a/drivers/char/agp/frontend.c
+++ b/drivers/char/agp/frontend.c
@@ -892,6 +892,9 @@ static int agpioc_allocate_wrap(struct a
if (copy_from_user(&alloc, arg, sizeof(struct agp_allocate)))
return -EFAULT;

+ if (alloc.type >= AGP_USER_TYPES)
+ return -EINVAL;
+
memory = agp_allocate_memory_wrap(alloc.pg_count, alloc.type);

if (memory == NULL)
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index ca4629f..7a6107f 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -101,6 +101,45 @@ static int agp_get_key(void)
return -1;
}

+/*
+ * Use kmalloc if possible for the page list. Otherwise fall back to
+ * vmalloc. This speeds things up and also saves memory for small AGP
+ * regions.
+ */
+
+static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages)
+{
+ struct agp_memory *new;
+ unsigned long alloc_size = num_agp_pages*sizeof(struct page *);
+
+ new = kmalloc(sizeof(struct agp_memory), GFP_KERNEL);
+
+ if (new == NULL)
+ return NULL;
+
+ memset(new, 0, sizeof(struct agp_memory));
+ new->key = agp_get_key();
+
+ if (new->key < 0) {
+ kfree(new);
+ return NULL;
+ }
+
+ if (alloc_size <= PAGE_SIZE) {
+ new->memory = kmalloc(alloc_size, GFP_KERNEL);
+ }
+ if (new->memory == NULL) {
+ new->memory = vmalloc(alloc_size);
+ }
+ if (new->memory == NULL) {
+ agp_free_key(new->key);
+ kfree(new);
+ return NULL;
+ }
+ new->num_scratch_pages = 0;
+ return new;
+}
+

struct agp_memory *agp_create_memory(int scratch_pages)
{
@@ -146,6 +185,11 @@ void agp_free_memory(struct agp_memory *
if (curr->is_bound == TRUE)
agp_unbind_memory(curr);

+ if (curr->type >= AGP_USER_TYPES) {
+ agp_generic_free_user(curr);
+ return;
+ }
+
if (curr->type != 0) {
curr->bridge->driver->free_by_type(curr);
return;
@@ -188,6 +232,13 @@ struct agp_memory *agp_allocate_memory(s
if ((atomic_read(&bridge->current_memory_agp) + page_count) > bridge->max_memory_agp)
return NULL;

+ if (type >= AGP_USER_TYPES) {
+ new = agp_generic_alloc_user(page_count, type);
+ if (new)
+ new->bridge = bridge;
+ return new;
+ }
+
if (type != 0) {
new = bridge->driver->alloc_by_type(page_count, type);
if (new)
@@ -960,6 +1011,7 @@ int agp_generic_insert_memory(struct agp
off_t j;
void *temp;
struct agp_bridge_data *bridge;
+ int mask_type;

bridge = mem->bridge;
if (!bridge)
@@ -992,7 +1044,12 @@ int agp_generic_insert_memory(struct agp
num_entries -= agp_memory_reserved/PAGE_SIZE;
if (num_entries < 0) num_entries = 0;

- if (type != 0 || mem->type != 0) {
+ if (type != mem->type) {
+ return -EINVAL;
+ }
+
+ mask_type = bridge->driver->agp_type_to_mask_type(bridge, type);
+ if (mask_type != 0) {
/* The generic routines know nothing of memory types */
return -EINVAL;
}
@@ -1001,6 +1058,9 @@ int agp_generic_insert_memory(struct agp
if ((pg_start + mem->page_count) > num_entries)
return -EINVAL;

+ if (mem->page_count == 0)
+ return 0;
+
j = pg_start;

while (j < (pg_start + mem->page_count)) {
@@ -1015,7 +1075,7 @@ int agp_generic_insert_memory(struct agp
}

for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
- writel(bridge->driver->mask_memory(bridge, mem->memory[i], mem->type), bridge->gatt_table+j);
+ writel(bridge->driver->mask_memory(bridge, mem->memory[i], mask_type), bridge->gatt_table+j);
readl(bridge->gatt_table+j); /* PCI Posting. */
}

@@ -1029,12 +1089,21 @@ int agp_generic_remove_memory(struct agp
{
size_t i;
struct agp_bridge_data *bridge;
+ int mask_type;

bridge = mem->bridge;
if (!bridge)
return -EINVAL;

- if (type != 0 || mem->type != 0) {
+ if (type != mem->type) {
+ return -EINVAL;
+ }
+
+ if (mem->page_count == 0)
+ return 0;
+
+ mask_type = bridge->driver->agp_type_to_mask_type(bridge, type);
+ if (mask_type != 0) {
/* The generic routines know nothing of memory types */
return -EINVAL;
}
@@ -1067,6 +1136,42 @@ void agp_generic_free_by_type(struct agp
}
EXPORT_SYMBOL(agp_generic_free_by_type);

+struct agp_memory *agp_generic_alloc_user(size_t page_count, int type)
+{
+ struct agp_memory *new;
+ int i;
+ int pages;
+
+ pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE;
+ new = agp_create_user_memory(page_count);
+ if (new == NULL)
+ return NULL;
+
+ for (i = 0; i < page_count; i++) {
+ new->memory[i] = 0;
+ }
+ new->page_count = 0;
+ new->type = type;
+ new->num_scratch_pages = pages;
+
+ return new;
+}
+EXPORT_SYMBOL(agp_generic_alloc_user);
+
+
+void agp_generic_free_user(struct agp_memory *curr)
+{
+ if ((unsigned long) curr->memory >= VMALLOC_START
+ && (unsigned long) curr->memory < VMALLOC_END) {
+ vfree(curr->memory);
+ } else {
+ kfree(curr->memory);
+ }
+ agp_free_key(curr->key);
+ kfree(curr);
+}
+EXPORT_SYMBOL(agp_generic_free_user);
+

/*
* Basic Page Allocation Routines -
@@ -1160,6 +1265,15 @@ unsigned long agp_generic_mask_memory(st
}
EXPORT_SYMBOL(agp_generic_mask_memory);

+int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge,
+ int type)
+{
+ if (type >= AGP_USER_TYPES)
+ return 0;
+ return type;
+}
+EXPORT_SYMBOL(agp_generic_type_to_mask_type);
+
/*
* These functions are implemented according to the AGPv3 spec,
* which covers implementation details that had previously been
diff --git a/drivers/char/agp/hp-agp.c b/drivers/char/agp/hp-agp.c
index 907fb66..847deab 100644
--- a/drivers/char/agp/hp-agp.c
+++ b/drivers/char/agp/hp-agp.c
@@ -438,6 +438,7 @@ struct agp_bridge_driver hp_zx1_driver =
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
.cant_use_aperture = 1,
};

diff --git a/drivers/char/agp/i460-agp.c b/drivers/char/agp/i460-agp.c
index 9176944..3e76186 100644
--- a/drivers/char/agp/i460-agp.c
+++ b/drivers/char/agp/i460-agp.c
@@ -293,6 +293,9 @@ static int i460_insert_memory_small_io_p
pr_debug("i460_insert_memory_small_io_page(mem=%p, pg_start=%ld, type=%d, paddr0=0x%lx)\n",
mem, pg_start, type, mem->memory[0]);

+ if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES)
+ return -EINVAL;
+
io_pg_start = I460_IOPAGES_PER_KPAGE * pg_start;

temp = agp_bridge->current_size;
@@ -396,6 +399,9 @@ static int i460_insert_memory_large_io_p
struct lp_desc *start, *end, *lp;
void *temp;

+ if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES)
+ return -EINVAL;
+
temp = agp_bridge->current_size;
num_entries = A_SIZE_8(temp)->num_entries;

@@ -572,6 +578,7 @@ #else
#endif
.alloc_by_type = agp_generic_alloc_by_type,
.free_by_type = agp_generic_free_by_type,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
.cant_use_aperture = 1,
};

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index d1ede7d..677581a 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -24,6 +24,9 @@ #define IS_I965 (agp_bridge->dev->device
agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965G_HB)


+extern int agp_memory_reserved;
+
+
/* Intel 815 register */
#define INTEL_815_APCONT 0x51
#define INTEL_815_ATTBASE_MASK ~0x1FFFFFFF
@@ -68,12 +71,15 @@ static struct aper_size_info_fixed intel

#define AGP_DCACHE_MEMORY 1
#define AGP_PHYS_MEMORY 2
+#define INTEL_AGP_CACHED_MEMORY 3

static struct gatt_mask intel_i810_masks[] =
{
{.mask = I810_PTE_VALID, .type = 0},
{.mask = (I810_PTE_VALID | I810_PTE_LOCAL), .type = AGP_DCACHE_MEMORY},
- {.mask = I810_PTE_VALID, .type = 0}
+ {.mask = I810_PTE_VALID, .type = 0},
+ {.mask = I810_PTE_VALID | I830_PTE_SYSTEM_CACHED,
+ .type = INTEL_AGP_CACHED_MEMORY}
};

static struct _intel_i810_private {
@@ -82,6 +88,7 @@ static struct _intel_i810_private {
int num_dcache_entries;
} intel_i810_private;

+
static int intel_i810_fetch_size(void)
{
u32 smram_miscc;
@@ -201,52 +208,79 @@ static void i8xx_destroy_pages(void *add
atomic_dec(&agp_bridge->current_memory_agp);
}

+static int intel_i830_type_to_mask_type(struct agp_bridge_data *bridge,
+ int type)
+{
+ if (type < AGP_USER_TYPES)
+ return type;
+ else if (type == AGP_USER_CACHED_MEMORY)
+ return INTEL_AGP_CACHED_MEMORY;
+ else
+ return 0;
+}
+
static int intel_i810_insert_entries(struct agp_memory *mem, off_t pg_start,
int type)
{
int i, j, num_entries;
void *temp;
+ 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 + mem->page_count) > num_entries)
- return -EINVAL;
+ goto out_err;
+

for (j = pg_start; j < (pg_start + mem->page_count); j++) {
- if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+j)))
- return -EBUSY;
+ if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+j))) {
+ ret = -EBUSY;
+ goto out_err;
+ }
}

- if (type != 0 || mem->type != 0) {
- if ((type == AGP_DCACHE_MEMORY) && (mem->type == AGP_DCACHE_MEMORY)) {
- /* special insert */
+ if (type != mem->type)
+ goto out_err;
+
+ mask_type = agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type);
+
+ switch (mask_type) {
+ case AGP_DCACHE_MEMORY:
+ if (!mem->is_flushed)
global_cache_flush();
- for (i = pg_start; i < (pg_start + mem->page_count); i++) {
- writel((i*4096)|I810_PTE_LOCAL|I810_PTE_VALID, intel_i810_private.registers+I810_PTE_BASE+(i*4));
- readl(intel_i810_private.registers+I810_PTE_BASE+(i*4)); /* PCI Posting. */
- }
+ for (i = pg_start; i < (pg_start + mem->page_count); i++) {
+ writel((i*4096)|I810_PTE_LOCAL|I810_PTE_VALID,
+ intel_i810_private.registers+I810_PTE_BASE+(i*4));
+ readl(intel_i810_private.registers+I810_PTE_BASE+(i*4));
+
+ }
+ break;
+ case AGP_PHYS_MEMORY:
+ if (!mem->is_flushed)
global_cache_flush();
- agp_bridge->driver->tlb_flush(mem);
- return 0;
+ for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
+ writel(agp_bridge->driver->mask_memory(agp_bridge,
+ mem->memory[i],
+ mask_type),
+ intel_i810_private.registers+I810_PTE_BASE+(j*4));
+ readl(intel_i810_private.registers+I810_PTE_BASE+(j*4));
}
- if ((type == AGP_PHYS_MEMORY) && (mem->type == AGP_PHYS_MEMORY))
- goto insert;
- return -EINVAL;
- }
-
-insert:
- global_cache_flush();
- for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
- writel(agp_bridge->driver->mask_memory(agp_bridge,
- mem->memory[i], mem->type),
- intel_i810_private.registers+I810_PTE_BASE+(j*4));
- readl(intel_i810_private.registers+I810_PTE_BASE+(j*4)); /* PCI Posting. */
+ break;
+ default:
+ goto out_err;
}
global_cache_flush();
-
agp_bridge->driver->tlb_flush(mem);
- return 0;
+out:
+ ret = 0;
+out_err:
+ mem->is_flushed = 1;
+ return ret;
}

static int intel_i810_remove_entries(struct agp_memory *mem, off_t pg_start,
@@ -254,11 +288,14 @@ static int intel_i810_remove_entries(str
{
int i;

+ if (mem->page_count == 0)
+ return 0;
+
for (i = pg_start; i < (mem->page_count + pg_start); i++) {
writel(agp_bridge->scratch_page, intel_i810_private.registers+I810_PTE_BASE+(i*4));
- readl(intel_i810_private.registers+I810_PTE_BASE+(i*4)); /* PCI Posting. */
+ readl(intel_i810_private.registers+I810_PTE_BASE+(i*4)) ;
}
-
+
global_cache_flush();
agp_bridge->driver->tlb_flush(mem);
return 0;
@@ -330,7 +367,6 @@ static struct agp_memory *intel_i810_all
}
if (type == AGP_PHYS_MEMORY)
return alloc_agpphysmem_i8xx(pg_count, type);
-
return NULL;
}

@@ -579,41 +615,55 @@ static int intel_i830_insert_entries(str
{
int i,j,num_entries;
void *temp;
+ int ret = -EINVAL;
+ int mask_type;

temp = agp_bridge->current_size;
num_entries = A_SIZE_FIX(temp)->num_entries;
+ if (mem->page_count == 0)
+ goto out;

if (pg_start < intel_i830_private.gtt_entries) {
printk (KERN_DEBUG PFX "pg_start == 0x%.8lx,intel_i830_private.gtt_entries == 0x%.8x\n",
pg_start,intel_i830_private.gtt_entries);

printk (KERN_INFO PFX "Trying to insert into local/stolen memory\n");
- return -EINVAL;
+ goto out_err;
}

if ((pg_start + mem->page_count) > num_entries)
- return -EINVAL;
+ 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 != 0 && type != AGP_PHYS_MEMORY) ||
- (mem->type != 0 && mem->type != AGP_PHYS_MEMORY))
- return -EINVAL;
+ 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)
+ goto out_err;

- global_cache_flush(); /* FIXME: Necessary ?*/
+ 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,
- mem->memory[i], mem->type),
- intel_i830_private.registers+I810_PTE_BASE+(j*4));
- readl(intel_i830_private.registers+I810_PTE_BASE+(j*4)); /* PCI Posting. */
+ mem->memory[i], mask_type),
+ intel_i830_private.registers+I810_PTE_BASE+(j*4));
+ readl(intel_i830_private.registers+I810_PTE_BASE+(j*4));
}
-
global_cache_flush();
agp_bridge->driver->tlb_flush(mem);
- return 0;
+
+out:
+ ret = 0;
+out_err:
+ mem->is_flushed = 1;
+ return ret;
}

static int intel_i830_remove_entries(struct agp_memory *mem,off_t pg_start,
@@ -630,9 +680,9 @@ static int intel_i830_remove_entries(str

for (i = pg_start; i < (mem->page_count + pg_start); i++) {
writel(agp_bridge->scratch_page, intel_i830_private.registers+I810_PTE_BASE+(i*4));
- readl(intel_i830_private.registers+I810_PTE_BASE+(i*4)); /* PCI Posting. */
+ readl(intel_i830_private.registers+I810_PTE_BASE+(i*4));
}
-
+
global_cache_flush();
agp_bridge->driver->tlb_flush(mem);
return 0;
@@ -642,7 +692,6 @@ static struct agp_memory *intel_i830_all
{
if (type == AGP_PHYS_MEMORY)
return alloc_agpphysmem_i8xx(pg_count, type);
-
/* always return NULL for other allocation types for now */
return NULL;
}
@@ -689,6 +738,11 @@ static int intel_i915_insert_entries(str
{
int i,j,num_entries;
void *temp;
+ 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;
@@ -698,31 +752,42 @@ static int intel_i915_insert_entries(str
pg_start,intel_i830_private.gtt_entries);

printk (KERN_INFO PFX "Trying to insert into local/stolen memory\n");
- return -EINVAL;
+ goto out_err;
}

if ((pg_start + mem->page_count) > num_entries)
- return -EINVAL;
+ goto out_err;

- /* The i830 can't check the GTT for entries since its read only,
+ /* The i915 can't check the GTT for entries since its read only,
* depend on the caller to make the correct offset decisions.
*/

- if ((type != 0 && type != AGP_PHYS_MEMORY) ||
- (mem->type != 0 && mem->type != AGP_PHYS_MEMORY))
- return -EINVAL;
+ if (type != mem->type)
+ goto out_err;

- global_cache_flush();
+ 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)
+ 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,
- mem->memory[i], mem->type), intel_i830_private.gtt+j);
- readl(intel_i830_private.gtt+j); /* PCI Posting. */
+ mem->memory[i], mask_type), intel_i830_private.gtt+j);
+ readl(intel_i830_private.gtt+j);
}
-
+
global_cache_flush();
agp_bridge->driver->tlb_flush(mem);
- return 0;
+
+ out:
+ ret = 0;
+ out_err:
+ mem->is_flushed = 1;
+ return ret;
}

static int intel_i915_remove_entries(struct agp_memory *mem,off_t pg_start,
@@ -1339,6 +1404,7 @@ static struct agp_bridge_driver intel_ge
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_810_driver = {
@@ -1363,6 +1429,7 @@ static struct agp_bridge_driver intel_81
.free_by_type = intel_i810_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_815_driver = {
@@ -1386,6 +1453,7 @@ static struct agp_bridge_driver intel_81
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_830_driver = {
@@ -1410,6 +1478,7 @@ static struct agp_bridge_driver intel_83
.free_by_type = intel_i810_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = intel_i830_type_to_mask_type,
};

static struct agp_bridge_driver intel_820_driver = {
@@ -1433,6 +1502,7 @@ static struct agp_bridge_driver intel_82
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_830mp_driver = {
@@ -1456,6 +1526,7 @@ static struct agp_bridge_driver intel_83
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_840_driver = {
@@ -1479,6 +1550,7 @@ static struct agp_bridge_driver intel_84
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_845_driver = {
@@ -1502,6 +1574,7 @@ static struct agp_bridge_driver intel_84
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_850_driver = {
@@ -1525,6 +1598,7 @@ static struct agp_bridge_driver intel_85
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_860_driver = {
@@ -1548,6 +1622,7 @@ static struct agp_bridge_driver intel_86
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver intel_915_driver = {
@@ -1572,6 +1647,7 @@ static struct agp_bridge_driver intel_91
.free_by_type = intel_i810_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = intel_i830_type_to_mask_type,
};

static struct agp_bridge_driver intel_i965_driver = {
@@ -1596,6 +1672,7 @@ static struct agp_bridge_driver intel_i9
.free_by_type = intel_i810_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = intel_i830_type_to_mask_type,
};

static struct agp_bridge_driver intel_7505_driver = {
@@ -1619,6 +1696,7 @@ static struct agp_bridge_driver intel_75
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static int find_i810(u16 device)
diff --git a/drivers/char/agp/nvidia-agp.c b/drivers/char/agp/nvidia-agp.c
index df7f37b..2563286 100644
--- a/drivers/char/agp/nvidia-agp.c
+++ b/drivers/char/agp/nvidia-agp.c
@@ -310,6 +310,7 @@ static struct agp_bridge_driver nvidia_d
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static int __devinit agp_nvidia_probe(struct pci_dev *pdev,
diff --git a/drivers/char/agp/sgi-agp.c b/drivers/char/agp/sgi-agp.c
index d73be4c..e191d2b 100644
--- a/drivers/char/agp/sgi-agp.c
+++ b/drivers/char/agp/sgi-agp.c
@@ -265,6 +265,7 @@ struct agp_bridge_driver sgi_tioca_drive
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = sgi_tioca_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
.cant_use_aperture = 1,
.needs_scratch_page = 0,
.num_aperture_sizes = 1,
diff --git a/drivers/char/agp/sworks-agp.c b/drivers/char/agp/sworks-agp.c
index 4f2d7d9..9f5ae77 100644
--- a/drivers/char/agp/sworks-agp.c
+++ b/drivers/char/agp/sworks-agp.c
@@ -444,6 +444,7 @@ static struct agp_bridge_driver sworks_d
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static int __devinit agp_serverworks_probe(struct pci_dev *pdev,
diff --git a/drivers/char/agp/uninorth-agp.c b/drivers/char/agp/uninorth-agp.c
index dffc193..6c45702 100644
--- a/drivers/char/agp/uninorth-agp.c
+++ b/drivers/char/agp/uninorth-agp.c
@@ -510,6 +510,7 @@ struct agp_bridge_driver uninorth_agp_dr
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
.cant_use_aperture = 1,
};

@@ -534,6 +535,7 @@ struct agp_bridge_driver u3_agp_driver =
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
.cant_use_aperture = 1,
.needs_scratch_page = 1,
};
diff --git a/drivers/char/agp/via-agp.c b/drivers/char/agp/via-agp.c
index c149ac9..143d3fa 100644
--- a/drivers/char/agp/via-agp.c
+++ b/drivers/char/agp/via-agp.c
@@ -191,6 +191,7 @@ static struct agp_bridge_driver via_agp3
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_bridge_driver via_driver = {
@@ -214,6 +215,7 @@ static struct agp_bridge_driver via_driv
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
+ .agp_type_to_mask_type = agp_generic_type_to_mask_type,
};

static struct agp_device_ids via_agp_device_ids[] __devinitdata =
diff --git a/include/linux/agp_backend.h b/include/linux/agp_backend.h
index a5c8bb5..89868be 100644
--- a/include/linux/agp_backend.h
+++ b/include/linux/agp_backend.h
@@ -91,6 +91,10 @@ struct agp_memory {

#define AGP_NORMAL_MEMORY 0

+#define AGP_USER_TYPES (1 << 16)
+#define AGP_USER_MEMORY (AGP_USER_TYPES)
+#define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1)
+
extern struct agp_bridge_data *agp_bridge;
extern struct list_head agp_bridges;