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drm/ttm: Rework validation & memory space allocation (V3)

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This change allow driver to pass sorted memory placement,
from most prefered placement to least prefered placement.
In order to avoid long function prototype a structure is
used to gather memory placement informations such as range
restriction (if you need a buffer to be in given range).
Range restriction is determined by fpfn & lpfn which are
the first page and last page number btw which allocation
can happen. If those fields are set to 0 ttm will assume
buffer can be put anywhere in the address space (thus it
avoids putting a burden on the driver to always properly
set those fields).

This patch also factor few functions like evicting first
entry of lru list or getting a memory space. This avoid
code duplication.

V2: Change API to use placement flags and array instead
    of packing placement order into a quadword.
V3: Make sure we set the appropriate mem.placement flag
    when validating or allocation memory space.

[Pending Thomas Hellstrom further review but okay
from preliminary review so far].

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse
2009-12-08 15:33:32 +01:00
committed by Dave Airlie
parent a2e68e92d3
commit ca262a9998
3 changed files with 259 additions and 272 deletions
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20
include/drm/ttm/ttm_bo_driver.h
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@@ -242,12 +242,6 @@ struct ttm_mem_type_manager {
/**
* struct ttm_bo_driver
*
* @mem_type_prio: Priority array of memory types to place a buffer object in
* if it fits without evicting buffers from any of these memory types.
* @mem_busy_prio: Priority array of memory types to place a buffer object in
* if it needs to evict buffers to make room.
* @num_mem_type_prio: Number of elements in the @mem_type_prio array.
* @num_mem_busy_prio: Number of elements in the @num_mem_busy_prio array.
* @create_ttm_backend_entry: Callback to create a struct ttm_backend.
* @invalidate_caches: Callback to invalidate read caches when a buffer object
* has been evicted.
@@ -265,11 +259,6 @@ struct ttm_mem_type_manager {
*/
struct ttm_bo_driver {
const uint32_t *mem_type_prio;
const uint32_t *mem_busy_prio;
uint32_t num_mem_type_prio;
uint32_t num_mem_busy_prio;
/**
* struct ttm_bo_driver member create_ttm_backend_entry
*
@@ -306,7 +295,8 @@ struct ttm_bo_driver {
* finished, they'll end up in bo->mem.flags
*/
uint32_t(*evict_flags) (struct ttm_buffer_object *bo);
void(*evict_flags) (struct ttm_buffer_object *bo,
struct ttm_placement *placement);
/**
* struct ttm_bo_driver member move:
*
@@ -651,9 +641,9 @@ extern bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev,
* -ERESTART: An interruptible sleep was interrupted by a signal.
*/
extern int ttm_bo_mem_space(struct ttm_buffer_object *bo,
uint32_t proposed_placement,
struct ttm_mem_reg *mem,
bool interruptible, bool no_wait);
struct ttm_placement *placement,
struct ttm_mem_reg *mem,
bool interruptible, bool no_wait);
/**
* ttm_bo_wait_for_cpu
*