[git pull] agp patches for 2.6.24-rc1
From: Dave Airlie
Date: Sun Oct 14 2007 - 21:18:43 EST
Hi Linus,
Please pull from 'agp-patches' branch of
master.kernel.org:/pub/scm/linux/kernel/git/airlied/agp-2.6.git agp-patches
to receive the following updates:
drivers/char/agp/agp.h | 7 +++++--
drivers/char/agp/ali-agp.c | 27 ++++++++++++++++-----------
drivers/char/agp/amd-k7-agp.c | 9 ++-------
drivers/char/agp/backend.c | 12 ++++++++----
drivers/char/agp/generic.c | 19 +++++++++++++------
drivers/char/agp/i460-agp.c | 4 ++--
drivers/char/agp/intel-agp.c | 6 ++++--
7 files changed, 50 insertions(+), 34 deletions(-)
Dave Airlie (1):
AGP fix race condition between unmapping and freeing pages
Jesper Juhl (1):
fix use after free in amd create gatt pages
diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index 8955e7f..b83824c 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -58,6 +58,9 @@ struct gatt_mask {
* devices this will probably be ignored */
};
+#define AGP_PAGE_DESTROY_UNMAP 1
+#define AGP_PAGE_DESTROY_FREE 2
+
struct aper_size_info_8 {
int size;
int num_entries;
@@ -113,7 +116,7 @@ struct agp_bridge_driver {
struct agp_memory *(*alloc_by_type) (size_t, int);
void (*free_by_type)(struct agp_memory *);
void *(*agp_alloc_page)(struct agp_bridge_data *);
- void (*agp_destroy_page)(void *);
+ void (*agp_destroy_page)(void *, int flags);
int (*agp_type_to_mask_type) (struct agp_bridge_data *, int);
};
@@ -267,7 +270,7 @@ int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type);
struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type);
void agp_generic_free_by_type(struct agp_memory *curr);
void *agp_generic_alloc_page(struct agp_bridge_data *bridge);
-void agp_generic_destroy_page(void *addr);
+void agp_generic_destroy_page(void *addr, int flags);
void agp_free_key(int key);
int agp_num_entries(void);
u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 mode, u32 command);
diff --git a/drivers/char/agp/ali-agp.c b/drivers/char/agp/ali-agp.c
index 4941ddb..aa5ddb7 100644
--- a/drivers/char/agp/ali-agp.c
+++ b/drivers/char/agp/ali-agp.c
@@ -156,29 +156,34 @@ static void *m1541_alloc_page(struct agp_bridge_data *bridge)
return addr;
}
-static void ali_destroy_page(void * addr)
+static void ali_destroy_page(void * addr, int flags)
{
if (addr) {
- global_cache_flush(); /* is this really needed? --hch */
- agp_generic_destroy_page(addr);
- global_flush_tlb();
+ if (flags & AGP_PAGE_DESTROY_UNMAP) {
+ global_cache_flush(); /* is this really needed? --hch */
+ agp_generic_destroy_page(addr, flags);
+ global_flush_tlb();
+ } else
+ agp_generic_destroy_page(addr, flags);
}
}
-static void m1541_destroy_page(void * addr)
+static void m1541_destroy_page(void * addr, int flags)
{
u32 temp;
if (addr == NULL)
return;
- global_cache_flush();
+ if (flags & AGP_PAGE_DESTROY_UNMAP) {
+ global_cache_flush();
- pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
- pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
- (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
- virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN));
- agp_generic_destroy_page(addr);
+ pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
+ pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
+ (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
+ virt_to_gart(addr)) | ALI_CACHE_FLUSH_EN));
+ }
+ agp_generic_destroy_page(addr, flags);
}
diff --git a/drivers/char/agp/amd-k7-agp.c b/drivers/char/agp/amd-k7-agp.c
index f60bca7..1405a42 100644
--- a/drivers/char/agp/amd-k7-agp.c
+++ b/drivers/char/agp/amd-k7-agp.c
@@ -100,21 +100,16 @@ static int amd_create_gatt_pages(int nr_tables)
for (i = 0; i < nr_tables; i++) {
entry = kzalloc(sizeof(struct amd_page_map), GFP_KERNEL);
+ tables[i] = entry;
if (entry == NULL) {
- while (i > 0) {
- kfree(tables[i-1]);
- i--;
- }
- kfree(tables);
retval = -ENOMEM;
break;
}
- tables[i] = entry;
retval = amd_create_page_map(entry);
if (retval != 0)
break;
}
- amd_irongate_private.num_tables = nr_tables;
+ amd_irongate_private.num_tables = i;
amd_irongate_private.gatt_pages = tables;
if (retval != 0)
diff --git a/drivers/char/agp/backend.c b/drivers/char/agp/backend.c
index 1b47c89..832ded2 100644
--- a/drivers/char/agp/backend.c
+++ b/drivers/char/agp/backend.c
@@ -189,9 +189,11 @@ static int agp_backend_initialize(struct agp_bridge_data *bridge)
err_out:
if (bridge->driver->needs_scratch_page) {
- bridge->driver->agp_destroy_page(
- gart_to_virt(bridge->scratch_page_real));
+ bridge->driver->agp_destroy_page(gart_to_virt(bridge->scratch_page_real),
+ AGP_PAGE_DESTROY_UNMAP);
flush_agp_mappings();
+ bridge->driver->agp_destroy_page(gart_to_virt(bridge->scratch_page_real),
+ AGP_PAGE_DESTROY_FREE);
}
if (got_gatt)
bridge->driver->free_gatt_table(bridge);
@@ -215,9 +217,11 @@ static void agp_backend_cleanup(struct agp_bridge_data *bridge)
if (bridge->driver->agp_destroy_page &&
bridge->driver->needs_scratch_page) {
- bridge->driver->agp_destroy_page(
- gart_to_virt(bridge->scratch_page_real));
+ bridge->driver->agp_destroy_page(gart_to_virt(bridge->scratch_page_real),
+ AGP_PAGE_DESTROY_UNMAP);
flush_agp_mappings();
+ bridge->driver->agp_destroy_page(gart_to_virt(bridge->scratch_page_real),
+ AGP_PAGE_DESTROY_FREE);
}
}
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index 3db4f40..64b2f6d 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -195,9 +195,12 @@ void agp_free_memory(struct agp_memory *curr)
}
if (curr->page_count != 0) {
for (i = 0; i < curr->page_count; i++) {
- curr->bridge->driver->agp_destroy_page(gart_to_virt(curr->memory[i]));
+ curr->bridge->driver->agp_destroy_page(gart_to_virt(curr->memory[i]), AGP_PAGE_DESTROY_UNMAP);
}
flush_agp_mappings();
+ for (i = 0; i < curr->page_count; i++) {
+ curr->bridge->driver->agp_destroy_page(gart_to_virt(curr->memory[i]), AGP_PAGE_DESTROY_FREE);
+ }
}
agp_free_key(curr->key);
agp_free_page_array(curr);
@@ -1176,7 +1179,7 @@ void *agp_generic_alloc_page(struct agp_bridge_data *bridge)
EXPORT_SYMBOL(agp_generic_alloc_page);
-void agp_generic_destroy_page(void *addr)
+void agp_generic_destroy_page(void *addr, int flags)
{
struct page *page;
@@ -1184,10 +1187,14 @@ void agp_generic_destroy_page(void *addr)
return;
page = virt_to_page(addr);
- unmap_page_from_agp(page);
- put_page(page);
- free_page((unsigned long)addr);
- atomic_dec(&agp_bridge->current_memory_agp);
+ if (flags & AGP_PAGE_DESTROY_UNMAP)
+ unmap_page_from_agp(page);
+
+ if (flags & AGP_PAGE_DESTROY_FREE) {
+ put_page(page);
+ free_page((unsigned long)addr);
+ atomic_dec(&agp_bridge->current_memory_agp);
+ }
}
EXPORT_SYMBOL(agp_generic_destroy_page);
diff --git a/drivers/char/agp/i460-agp.c b/drivers/char/agp/i460-agp.c
index 75d2aca..70117df 100644
--- a/drivers/char/agp/i460-agp.c
+++ b/drivers/char/agp/i460-agp.c
@@ -536,10 +536,10 @@ static void *i460_alloc_page (struct agp_bridge_data *bridge)
return page;
}
-static void i460_destroy_page (void *page)
+static void i460_destroy_page (void *page, int flags)
{
if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT) {
- agp_generic_destroy_page(page);
+ agp_generic_destroy_page(page, flags);
global_flush_tlb();
}
}
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 141ca17..d879619 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -400,9 +400,11 @@ static void intel_i810_free_by_type(struct agp_memory *curr)
if (curr->page_count == 4)
i8xx_destroy_pages(gart_to_virt(curr->memory[0]));
else {
- agp_bridge->driver->agp_destroy_page(
- gart_to_virt(curr->memory[0]));
+ agp_bridge->driver->agp_destroy_page(gart_to_virt(curr->memory[0]),
+ AGP_PAGE_DESTROY_UNMAP);
global_flush_tlb();
+ agp_bridge->driver->agp_destroy_page(gart_to_virt(curr->memory[0]),
+ AGP_PAGE_DESTROY_FREE);
}
agp_free_page_array(curr);
}
-
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