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drm: Branch 'master' - 5 commits
|
From: <ke...@ke...> - 2007-12-21 20:16:59
|
libdrm/xf86drm.c | 6 -
libdrm/xf86mm.h | 2
linux-core/drm_agpsupport.c | 16 +++-
linux-core/drm_bo.c | 169 +++++++++++++++++++++++++++++---------------
linux-core/drm_bo_move.c | 14 +--
linux-core/drm_objects.h | 119 +++++++++++++++++++++++++++---
linux-core/drm_ttm.c | 113 ++++++++++++++++++++---------
linux-core/drm_vm.c | 4 -
linux-core/i915_buffer.c | 15 +++
linux-core/i915_drv.c | 4 -
linux-core/nouveau_buffer.c | 15 ++-
linux-core/nouveau_sgdma.c | 9 +-
linux-core/via_buffer.c | 2
shared-core/drm.h | 25 +++++-
shared-core/i915_drv.h | 6 -
shared-core/via_drv.c | 2
shared-core/via_drv.h | 2
17 files changed, 380 insertions(+), 143 deletions(-)
New commits:
commit da3601e43ae75695f3b080904b1e090c8eb1cd8e
Author: Keith Packard <ke...@ke...>
Date: Sun Dec 16 22:00:45 2007 -0800
Change drm_bo_type_dc to drm_bo_type_device and comment usage of this value.
I couldn't figure out what drm_bo_type_dc was for; Dave Airlie finally clued
me in that it was the 'normal' buffer objects with kernel allocated pages
that could be mmapped from the drm device file.
I thought that 'drm_bo_type_device' was a more descriptive name.
I also added a bunch of comments describing the use of the type enum values and
the functions that use them.
diff --git a/linux-core/drm_bo.c b/linux-core/drm_bo.c
index 171c074..df10e12 100644
--- a/linux-core/drm_bo.c
+++ b/linux-core/drm_bo.c
@@ -146,7 +146,7 @@ static int drm_bo_add_ttm(struct drm_buffer_object *bo)
page_flags |= DRM_TTM_PAGE_WRITE;
switch (bo->type) {
- case drm_bo_type_dc:
+ case drm_bo_type_device:
case drm_bo_type_kernel:
bo->ttm = drm_ttm_create(dev, bo->num_pages << PAGE_SHIFT,
page_flags, dev->bm.dummy_read_page);
@@ -1155,7 +1155,12 @@ static void drm_bo_fill_rep_arg(struct drm_buffer_object *bo,
rep->size = bo->num_pages * PAGE_SIZE;
rep->offset = bo->offset;
- if (bo->type == drm_bo_type_dc)
+ /*
+ * drm_bo_type_device buffers have user-visible
+ * handles which can be used to share across
+ * processes. Hand that back to the application
+ */
+ if (bo->type == drm_bo_type_device)
rep->arg_handle = bo->map_list.user_token;
else
rep->arg_handle = 0;
@@ -1786,7 +1791,12 @@ int drm_buffer_object_create(struct drm_device *dev,
if (ret)
goto out_err;
- if (bo->type == drm_bo_type_dc) {
+ /*
+ * For drm_bo_type_device buffers, allocate
+ * address space from the device so that applications
+ * can mmap the buffer from there
+ */
+ if (bo->type == drm_bo_type_device) {
mutex_lock(&dev->struct_mutex);
ret = drm_bo_setup_vm_locked(bo);
mutex_unlock(&dev->struct_mutex);
@@ -1849,7 +1859,12 @@ int drm_bo_create_ioctl(struct drm_device *dev, void *data, struct drm_file *fil
return -EINVAL;
}
- bo_type = (req->buffer_start) ? drm_bo_type_user : drm_bo_type_dc;
+ /*
+ * If the buffer creation request comes in with a starting address,
+ * that points at the desired user pages to map. Otherwise, create
+ * a drm_bo_type_device buffer, which uses pages allocated from the kernel
+ */
+ bo_type = (req->buffer_start) ? drm_bo_type_user : drm_bo_type_device;
/*
* User buffers cannot be shared
@@ -2607,6 +2622,14 @@ void drm_bo_unmap_virtual(struct drm_buffer_object *bo)
unmap_mapping_range(dev->dev_mapping, offset, holelen, 1);
}
+/**
+ * drm_bo_takedown_vm_locked:
+ *
+ * @bo: the buffer object to remove any drm device mapping
+ *
+ * Remove any associated vm mapping on the drm device node that
+ * would have been created for a drm_bo_type_device buffer
+ */
static void drm_bo_takedown_vm_locked(struct drm_buffer_object *bo)
{
struct drm_map_list *list;
@@ -2614,7 +2637,7 @@ static void drm_bo_takedown_vm_locked(struct drm_buffer_object *bo)
struct drm_device *dev = bo->dev;
DRM_ASSERT_LOCKED(&dev->struct_mutex);
- if (bo->type != drm_bo_type_dc)
+ if (bo->type != drm_bo_type_device)
return;
list = &bo->map_list;
@@ -2637,6 +2660,16 @@ static void drm_bo_takedown_vm_locked(struct drm_buffer_object *bo)
drm_bo_usage_deref_locked(&bo);
}
+/**
+ * drm_bo_setup_vm_locked:
+ *
+ * @bo: the buffer to allocate address space for
+ *
+ * Allocate address space in the drm device so that applications
+ * can mmap the buffer and access the contents. This only
+ * applies to drm_bo_type_device objects as others are not
+ * placed in the drm device address space.
+ */
static int drm_bo_setup_vm_locked(struct drm_buffer_object *bo)
{
struct drm_map_list *list = &bo->map_list;
diff --git a/linux-core/drm_objects.h b/linux-core/drm_objects.h
index 98421e4..a2d10b5 100644
--- a/linux-core/drm_objects.h
+++ b/linux-core/drm_objects.h
@@ -404,9 +404,31 @@ struct drm_bo_mem_reg {
};
enum drm_bo_type {
- drm_bo_type_dc,
+ /*
+ * drm_bo_type_device are 'normal' drm allocations,
+ * pages are allocated from within the kernel automatically
+ * and the objects can be mmap'd from the drm device. Each
+ * drm_bo_type_device object has a unique name which can be
+ * used by other processes to share access to the underlying
+ * buffer.
+ */
+ drm_bo_type_device,
+ /*
+ * drm_bo_type_user are buffers of pages that already exist
+ * in the process address space. They are more limited than
+ * drm_bo_type_device buffers in that they must always
+ * remain cached (as we assume the user pages are mapped cached),
+ * and they are not sharable to other processes through DRM
+ * (although, regular shared memory should still work fine).
+ */
drm_bo_type_user,
- drm_bo_type_kernel, /* for initial kernel allocations */
+ /*
+ * drm_bo_type_kernel are buffers that exist solely for use
+ * within the kernel. The pages cannot be mapped into the
+ * process. One obvious use would be for the ring
+ * buffer where user access would not (ideally) be required.
+ */
+ drm_bo_type_kernel,
};
struct drm_buffer_object {
commit d1187641d64f442968a3b9ea6a19de6cdd45acd4
Author: Keith Packard <ke...@ke...>
Date: Sun Dec 16 20:16:50 2007 -0800
Rename inappropriately named 'mask' fields to 'proposed_flags' instead.
Flags pending validation were stored in a misleadingly named field, 'mask'.
As 'mask' is already used to indicate pieces of a flags field which are
changing, it seems better to use a name reflecting the actual purpose of
this field. I chose 'proposed_flags' as they may not actually end up in
'flags', and in an case will be modified when they are moved over.
This affects the API, but not ABI of the user-mode interface.
diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index 4265c32..e3550de 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -2578,7 +2578,7 @@ static void drmBOCopyReply(const struct drm_bo_info_rep *rep, drmBO *buf)
buf->size = rep->size;
buf->offset = rep->offset;
buf->mapHandle = rep->arg_handle;
- buf->mask = rep->mask;
+ buf->proposedFlags = rep->proposed_flags;
buf->start = rep->buffer_start;
buf->fenceFlags = rep->fence_flags;
buf->replyFlags = rep->rep_flags;
@@ -2592,7 +2592,7 @@ static void drmBOCopyReply(const struct drm_bo_info_rep *rep, drmBO *buf)
int drmBOCreate(int fd, unsigned long size,
unsigned pageAlignment, void *user_buffer,
- uint64_t mask,
+ uint64_t flags,
unsigned hint, drmBO *buf)
{
struct drm_bo_create_arg arg;
@@ -2602,7 +2602,7 @@ int drmBOCreate(int fd, unsigned long size,
memset(buf, 0, sizeof(*buf));
memset(&arg, 0, sizeof(arg));
- req->mask = mask;
+ req->flags = flags;
req->hint = hint;
req->size = size;
req->page_alignment = pageAlignment;
diff --git a/libdrm/xf86mm.h b/libdrm/xf86mm.h
index d3df849..c80288a 100644
--- a/libdrm/xf86mm.h
+++ b/libdrm/xf86mm.h
@@ -110,7 +110,7 @@ typedef struct _drmBO
unsigned handle;
uint64_t mapHandle;
uint64_t flags;
- uint64_t mask;
+ uint64_t proposedFlags;
unsigned mapFlags;
unsigned long size;
unsigned long offset;
diff --git a/linux-core/drm_bo.c b/linux-core/drm_bo.c
index e7b9c5b..171c074 100644
--- a/linux-core/drm_bo.c
+++ b/linux-core/drm_bo.c
@@ -80,7 +80,7 @@ void drm_bo_add_to_lru(struct drm_buffer_object *bo)
DRM_ASSERT_LOCKED(&bo->dev->struct_mutex);
- if (!(bo->mem.mask & (DRM_BO_FLAG_NO_MOVE | DRM_BO_FLAG_NO_EVICT))
+ if (!(bo->mem.proposed_flags & (DRM_BO_FLAG_NO_MOVE | DRM_BO_FLAG_NO_EVICT))
|| bo->mem.mem_type != bo->pinned_mem_type) {
man = &bo->dev->bm.man[bo->mem.mem_type];
list_add_tail(&bo->lru, &man->lru);
@@ -142,7 +142,7 @@ static int drm_bo_add_ttm(struct drm_buffer_object *bo)
DRM_ASSERT_LOCKED(&bo->mutex);
bo->ttm = NULL;
- if (bo->mem.mask & DRM_BO_FLAG_WRITE)
+ if (bo->mem.proposed_flags & DRM_BO_FLAG_WRITE)
page_flags |= DRM_TTM_PAGE_WRITE;
switch (bo->type) {
@@ -214,11 +214,11 @@ static int drm_bo_handle_move_mem(struct drm_buffer_object *bo,
struct drm_bo_mem_reg *old_mem = &bo->mem;
uint64_t save_flags = old_mem->flags;
- uint64_t save_mask = old_mem->mask;
+ uint64_t save_proposed_flags = old_mem->proposed_flags;
*old_mem = *mem;
mem->mm_node = NULL;
- old_mem->mask = save_mask;
+ old_mem->proposed_flags = save_proposed_flags;
DRM_FLAG_MASKED(save_flags, mem->flags, DRM_BO_MASK_MEMTYPE);
} else if (!(old_man->flags & _DRM_FLAG_MEMTYPE_FIXED) &&
@@ -708,7 +708,7 @@ static int drm_bo_evict(struct drm_buffer_object *bo, unsigned mem_type,
evict_mem.mm_node = NULL;
evict_mem = bo->mem;
- evict_mem.mask = dev->driver->bo_driver->evict_mask(bo);
+ evict_mem.proposed_flags = dev->driver->bo_driver->evict_flags(bo);
ret = drm_bo_mem_space(bo, &evict_mem, no_wait);
if (ret) {
@@ -872,7 +872,7 @@ int drm_bo_mem_space(struct drm_buffer_object *bo,
type_ok = drm_bo_mt_compatible(man,
bo->type == drm_bo_type_user,
- mem_type, mem->mask,
+ mem_type, mem->proposed_flags,
&cur_flags);
if (!type_ok)
@@ -924,7 +924,7 @@ int drm_bo_mem_space(struct drm_buffer_object *bo,
if (!drm_bo_mt_compatible(man,
bo->type == drm_bo_type_user,
mem_type,
- mem->mask,
+ mem->proposed_flags,
&cur_flags))
continue;
@@ -944,11 +944,25 @@ int drm_bo_mem_space(struct drm_buffer_object *bo,
}
EXPORT_SYMBOL(drm_bo_mem_space);
-static int drm_bo_new_mask(struct drm_buffer_object *bo,
- uint64_t new_flags, uint64_t used_mask)
+/*
+ * drm_bo_propose_flags:
+ *
+ * @bo: the buffer object getting new flags
+ *
+ * @new_flags: the new set of proposed flag bits
+ *
+ * @new_mask: the mask of bits changed in new_flags
+ *
+ * Modify the proposed_flag bits in @bo
+ */
+static int drm_bo_modify_proposed_flags (struct drm_buffer_object *bo,
+ uint64_t new_flags, uint64_t new_mask)
{
- uint32_t new_props;
+ uint32_t new_access;
+ /* Copy unchanging bits from existing proposed_flags */
+ DRM_FLAG_MASKED(new_flags, bo->mem.proposed_flags, ~new_mask);
+
if (bo->type == drm_bo_type_user &&
((new_flags & (DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING)) !=
(DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING))) {
@@ -956,7 +970,7 @@ static int drm_bo_new_mask(struct drm_buffer_object *bo,
return -EINVAL;
}
- if ((used_mask & DRM_BO_FLAG_NO_EVICT) && !DRM_SUSER(DRM_CURPROC)) {
+ if ((new_mask & DRM_BO_FLAG_NO_EVICT) && !DRM_SUSER(DRM_CURPROC)) {
DRM_ERROR("DRM_BO_FLAG_NO_EVICT is only available to priviliged processes.\n");
return -EPERM;
}
@@ -966,15 +980,15 @@ static int drm_bo_new_mask(struct drm_buffer_object *bo,
return -EPERM;
}
- new_props = new_flags & (DRM_BO_FLAG_EXE | DRM_BO_FLAG_WRITE |
- DRM_BO_FLAG_READ);
+ new_access = new_flags & (DRM_BO_FLAG_EXE | DRM_BO_FLAG_WRITE |
+ DRM_BO_FLAG_READ);
- if (!new_props) {
+ if (new_access == 0) {
DRM_ERROR("Invalid buffer object rwx properties\n");
return -EINVAL;
}
- bo->mem.mask = new_flags;
+ bo->mem.proposed_flags = new_flags;
return 0;
}
@@ -1109,8 +1123,8 @@ static int drm_bo_wait_unfenced(struct drm_buffer_object *bo, int no_wait,
ret = 0;
mutex_unlock(&bo->mutex);
- DRM_WAIT_ON(ret, bo->event_queue, 3 * DRM_HZ,
- !drm_bo_check_unfenced(bo));
+ DRM_WAIT_ON (ret, bo->event_queue, 3 * DRM_HZ,
+ !drm_bo_check_unfenced(bo));
mutex_lock(&bo->mutex);
if (ret == -EINTR)
return -EAGAIN;
@@ -1146,7 +1160,7 @@ static void drm_bo_fill_rep_arg(struct drm_buffer_object *bo,
else
rep->arg_handle = 0;
- rep->mask = bo->mem.mask;
+ rep->proposed_flags = bo->mem.proposed_flags;
rep->buffer_start = bo->buffer_start;
rep->fence_flags = bo->fence_type;
rep->rep_flags = 0;
@@ -1292,7 +1306,7 @@ static void drm_buffer_user_object_unmap(struct drm_file *file_priv,
/*
* bo->mutex locked.
- * Note that new_mem_flags are NOT transferred to the bo->mem.mask.
+ * Note that new_mem_flags are NOT transferred to the bo->mem.proposed_flags.
*/
int drm_bo_move_buffer(struct drm_buffer_object *bo, uint64_t new_mem_flags,
@@ -1318,7 +1332,7 @@ int drm_bo_move_buffer(struct drm_buffer_object *bo, uint64_t new_mem_flags,
mem.num_pages = bo->num_pages;
mem.size = mem.num_pages << PAGE_SHIFT;
- mem.mask = new_mem_flags;
+ mem.proposed_flags = new_mem_flags;
mem.page_alignment = bo->mem.page_alignment;
mutex_lock(&bm->evict_mutex);
@@ -1361,18 +1375,18 @@ out_unlock:
static int drm_bo_mem_compat(struct drm_bo_mem_reg *mem)
{
- uint32_t flag_diff = (mem->mask ^ mem->flags);
+ uint32_t flag_diff = (mem->proposed_flags ^ mem->flags);
- if ((mem->mask & mem->flags & DRM_BO_MASK_MEM) == 0)
+ if ((mem->proposed_flags & mem->flags & DRM_BO_MASK_MEM) == 0)
return 0;
if ((flag_diff & DRM_BO_FLAG_CACHED) &&
- (/* !(mem->mask & DRM_BO_FLAG_CACHED) ||*/
- (mem->mask & DRM_BO_FLAG_FORCE_CACHING)))
+ (/* !(mem->proposed_flags & DRM_BO_FLAG_CACHED) ||*/
+ (mem->proposed_flags & DRM_BO_FLAG_FORCE_CACHING)))
return 0;
if ((flag_diff & DRM_BO_FLAG_MAPPABLE) &&
- ((mem->mask & DRM_BO_FLAG_MAPPABLE) ||
- (mem->mask & DRM_BO_FLAG_FORCE_MAPPABLE)))
+ ((mem->proposed_flags & DRM_BO_FLAG_MAPPABLE) ||
+ (mem->proposed_flags & DRM_BO_FLAG_FORCE_MAPPABLE)))
return 0;
return 1;
}
@@ -1408,8 +1422,8 @@ static int drm_buffer_object_validate(struct drm_buffer_object *bo,
uint32_t ftype;
int ret;
- DRM_DEBUG("New flags 0x%016llx, Old flags 0x%016llx\n",
- (unsigned long long) bo->mem.mask,
+ DRM_DEBUG("Proposed flags 0x%016llx, Old flags 0x%016llx\n",
+ (unsigned long long) bo->mem.proposed_flags,
(unsigned long long) bo->mem.flags);
ret = driver->fence_type(bo, &fence_class, &ftype);
@@ -1450,7 +1464,7 @@ static int drm_buffer_object_validate(struct drm_buffer_object *bo,
*/
if (!drm_bo_mem_compat(&bo->mem)) {
- ret = drm_bo_move_buffer(bo, bo->mem.mask, no_wait,
+ ret = drm_bo_move_buffer(bo, bo->mem.proposed_flags, no_wait,
move_unfenced);
if (ret) {
if (ret != -EAGAIN)
@@ -1463,7 +1477,7 @@ static int drm_buffer_object_validate(struct drm_buffer_object *bo,
* Pinned buffers.
*/
- if (bo->mem.mask & (DRM_BO_FLAG_NO_EVICT | DRM_BO_FLAG_NO_MOVE)) {
+ if (bo->mem.proposed_flags & (DRM_BO_FLAG_NO_EVICT | DRM_BO_FLAG_NO_MOVE)) {
bo->pinned_mem_type = bo->mem.mem_type;
mutex_lock(&dev->struct_mutex);
list_del_init(&bo->pinned_lru);
@@ -1499,7 +1513,13 @@ static int drm_buffer_object_validate(struct drm_buffer_object *bo,
if (ret)
return ret;
}
- DRM_FLAG_MASKED(bo->mem.flags, bo->mem.mask, ~DRM_BO_MASK_MEMTYPE);
+ /*
+ * Validation has succeeded, move the access and other
+ * non-mapping-related flag bits from the proposed flags to
+ * the active flags
+ */
+
+ DRM_FLAG_MASKED(bo->mem.flags, bo->mem.proposed_flags, ~DRM_BO_MASK_MEMTYPE);
/*
* Finally, adjust lru to be sure.
@@ -1563,9 +1583,7 @@ int drm_bo_do_validate(struct drm_buffer_object *bo,
if (ret)
goto out;
-
- DRM_FLAG_MASKED(flags, bo->mem.mask, ~mask);
- ret = drm_bo_new_mask(bo, flags, mask);
+ ret = drm_bo_modify_proposed_flags (bo, flags, mask);
if (ret)
goto out;
@@ -1712,7 +1730,7 @@ out:
int drm_buffer_object_create(struct drm_device *dev,
unsigned long size,
enum drm_bo_type type,
- uint64_t mask,
+ uint64_t flags,
uint32_t hint,
uint32_t page_alignment,
unsigned long buffer_start,
@@ -1757,12 +1775,14 @@ int drm_buffer_object_create(struct drm_device *dev,
bo->mem.page_alignment = page_alignment;
bo->buffer_start = buffer_start & PAGE_MASK;
bo->priv_flags = 0;
- bo->mem.flags = DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED |
- DRM_BO_FLAG_MAPPABLE;
- bo->mem.mask = DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED |
- DRM_BO_FLAG_MAPPABLE;
+ bo->mem.flags = (DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED |
+ DRM_BO_FLAG_MAPPABLE);
+ bo->mem.proposed_flags = 0;
atomic_inc(&bm->count);
- ret = drm_bo_new_mask(bo, mask, mask);
+ /*
+ * Use drm_bo_modify_proposed_flags to error-check the proposed flags
+ */
+ ret = drm_bo_modify_proposed_flags (bo, flags, flags);
if (ret)
goto out_err;
@@ -1831,18 +1851,21 @@ int drm_bo_create_ioctl(struct drm_device *dev, void *data, struct drm_file *fil
bo_type = (req->buffer_start) ? drm_bo_type_user : drm_bo_type_dc;
+ /*
+ * User buffers cannot be shared
+ */
if (bo_type == drm_bo_type_user)
- req->mask &= ~DRM_BO_FLAG_SHAREABLE;
+ req->flags &= ~DRM_BO_FLAG_SHAREABLE;
ret = drm_buffer_object_create(file_priv->head->dev,
- req->size, bo_type, req->mask,
+ req->size, bo_type, req->flags,
req->hint, req->page_alignment,
req->buffer_start, &entry);
if (ret)
goto out;
ret = drm_bo_add_user_object(file_priv, entry,
- req->mask & DRM_BO_FLAG_SHAREABLE);
+ req->flags & DRM_BO_FLAG_SHAREABLE);
if (ret) {
drm_bo_usage_deref_unlocked(&entry);
goto out;
@@ -2034,7 +2057,7 @@ static int drm_bo_leave_list(struct drm_buffer_object *bo,
DRM_ERROR("A DRM_BO_NO_EVICT buffer present at "
"cleanup. Removing flag and evicting.\n");
bo->mem.flags &= ~DRM_BO_FLAG_NO_EVICT;
- bo->mem.mask &= ~DRM_BO_FLAG_NO_EVICT;
+ bo->mem.proposed_flags &= ~DRM_BO_FLAG_NO_EVICT;
}
if (bo->mem.mem_type == mem_type)
diff --git a/linux-core/drm_bo_move.c b/linux-core/drm_bo_move.c
index 4afdfbb..b06a09f 100644
--- a/linux-core/drm_bo_move.c
+++ b/linux-core/drm_bo_move.c
@@ -54,7 +54,7 @@ int drm_bo_move_ttm(struct drm_buffer_object *bo,
struct drm_ttm *ttm = bo->ttm;
struct drm_bo_mem_reg *old_mem = &bo->mem;
uint64_t save_flags = old_mem->flags;
- uint64_t save_mask = old_mem->mask;
+ uint64_t save_proposed_flags = old_mem->proposed_flags;
int ret;
if (old_mem->mem_type == DRM_BO_MEM_TT) {
@@ -78,7 +78,7 @@ int drm_bo_move_ttm(struct drm_buffer_object *bo,
*old_mem = *new_mem;
new_mem->mm_node = NULL;
- old_mem->mask = save_mask;
+ old_mem->proposed_flags = save_proposed_flags;
DRM_FLAG_MASKED(save_flags, new_mem->flags, DRM_BO_MASK_MEMTYPE);
return 0;
}
@@ -210,7 +210,7 @@ int drm_bo_move_memcpy(struct drm_buffer_object *bo,
void *new_iomap;
int ret;
uint64_t save_flags = old_mem->flags;
- uint64_t save_mask = old_mem->mask;
+ uint64_t save_proposed_flags = old_mem->proposed_flags;
unsigned long i;
unsigned long page;
unsigned long add = 0;
@@ -255,7 +255,7 @@ out2:
*old_mem = *new_mem;
new_mem->mm_node = NULL;
- old_mem->mask = save_mask;
+ old_mem->proposed_flags = save_proposed_flags;
DRM_FLAG_MASKED(save_flags, new_mem->flags, DRM_BO_MASK_MEMTYPE);
if ((man->flags & _DRM_FLAG_MEMTYPE_FIXED) && (ttm != NULL)) {
@@ -330,7 +330,7 @@ int drm_bo_move_accel_cleanup(struct drm_buffer_object *bo,
struct drm_bo_mem_reg *old_mem = &bo->mem;
int ret;
uint64_t save_flags = old_mem->flags;
- uint64_t save_mask = old_mem->mask;
+ uint64_t save_proposed_flags = old_mem->proposed_flags;
struct drm_buffer_object *old_obj;
if (bo->fence)
@@ -399,7 +399,7 @@ int drm_bo_move_accel_cleanup(struct drm_buffer_object *bo,
*old_mem = *new_mem;
new_mem->mm_node = NULL;
- old_mem->mask = save_mask;
+ old_mem->proposed_flags = save_proposed_flags;
DRM_FLAG_MASKED(save_flags, new_mem->flags, DRM_BO_MASK_MEMTYPE);
return 0;
}
diff --git a/linux-core/drm_objects.h b/linux-core/drm_objects.h
index 47b6b01..98421e4 100644
--- a/linux-core/drm_objects.h
+++ b/linux-core/drm_objects.h
@@ -385,8 +385,20 @@ struct drm_bo_mem_reg {
unsigned long num_pages;
uint32_t page_alignment;
uint32_t mem_type;
+ /*
+ * Current buffer status flags, indicating
+ * where the buffer is located and which
+ * access modes are in effect
+ */
uint64_t flags;
- uint64_t mask;
+ /**
+ * These are the flags proposed for
+ * a validate operation. If the
+ * validate succeeds, they'll get moved
+ * into the flags field
+ */
+ uint64_t proposed_flags;
+
uint32_t desired_tile_stride;
uint32_t hw_tile_stride;
};
@@ -511,9 +523,36 @@ struct drm_bo_driver {
int (*invalidate_caches) (struct drm_device *dev, uint64_t flags);
int (*init_mem_type) (struct drm_device *dev, uint32_t type,
struct drm_mem_type_manager *man);
- uint32_t(*evict_mask) (struct drm_buffer_object *bo);
+ /*
+ * evict_flags:
+ *
+ * @bo: the buffer object to be evicted
+ *
+ * Return the bo flags for a buffer which is not mapped to the hardware.
+ * These will be placed in proposed_flags so that when the move is
+ * finished, they'll end up in bo->mem.flags
+ */
+ uint64_t(*evict_flags) (struct drm_buffer_object *bo);
+ /*
+ * move:
+ *
+ * @bo: the buffer to move
+ *
+ * @evict: whether this motion is evicting the buffer from
+ * the graphics address space
+ *
+ * @no_wait: whether this should give up and return -EBUSY
+ * if this move would require sleeping
+ *
+ * @new_mem: the new memory region receiving the buffer
+ *
+ * Move a buffer between two memory regions.
+ */
int (*move) (struct drm_buffer_object *bo,
int evict, int no_wait, struct drm_bo_mem_reg *new_mem);
+ /*
+ * ttm_cache_flush
+ */
void (*ttm_cache_flush)(struct drm_ttm *ttm);
};
@@ -554,7 +593,7 @@ extern int drm_fence_buffer_objects(struct drm_device *dev,
struct drm_fence_object **used_fence);
extern void drm_bo_add_to_lru(struct drm_buffer_object *bo);
extern int drm_buffer_object_create(struct drm_device *dev, unsigned long size,
- enum drm_bo_type type, uint64_t mask,
+ enum drm_bo_type type, uint64_t flags,
uint32_t hint, uint32_t page_alignment,
unsigned long buffer_start,
struct drm_buffer_object **bo);
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index f2681cc..dcefcb3 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -751,10 +751,10 @@ static unsigned long drm_bo_vm_nopfn(struct vm_area_struct *vma,
*/
if (!(bo->mem.flags & DRM_BO_FLAG_MAPPABLE)) {
- uint32_t new_mask = bo->mem.mask |
+ uint32_t new_flags = bo->mem.proposed_flags |
DRM_BO_FLAG_MAPPABLE |
DRM_BO_FLAG_FORCE_MAPPABLE;
- err = drm_bo_move_buffer(bo, new_mask, 0, 0);
+ err = drm_bo_move_buffer(bo, new_flags, 0, 0);
if (err) {
ret = (err != -EAGAIN) ? NOPFN_SIGBUS : NOPFN_REFAULT;
goto out_unlock;
diff --git a/linux-core/i915_buffer.c b/linux-core/i915_buffer.c
index b000a72..3dd236d 100644
--- a/linux-core/i915_buffer.c
+++ b/linux-core/i915_buffer.c
@@ -38,11 +38,11 @@ struct drm_ttm_backend *i915_create_ttm_backend_entry(struct drm_device *dev)
return drm_agp_init_ttm(dev);
}
-int i915_fence_types(struct drm_buffer_object *bo,
+int i915_fence_type(struct drm_buffer_object *bo,
uint32_t *fclass,
uint32_t *type)
{
- if (bo->mem.mask & (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE))
+ if (bo->mem.proposed_flags & (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE))
*type = 3;
else
*type = 1;
@@ -110,7 +110,16 @@ int i915_init_mem_type(struct drm_device *dev, uint32_t type,
return 0;
}
-uint32_t i915_evict_mask(struct drm_buffer_object *bo)
+/*
+ * i915_evict_flags:
+ *
+ * @bo: the buffer object to be evicted
+ *
+ * Return the bo flags for a buffer which is not mapped to the hardware.
+ * These will be placed in proposed_flags so that when the move is
+ * finished, they'll end up in bo->mem.flags
+ */
+uint64_t i915_evict_flags(struct drm_buffer_object *bo)
{
switch (bo->mem.mem_type) {
case DRM_BO_MEM_LOCAL:
diff --git a/linux-core/i915_drv.c b/linux-core/i915_drv.c
index d2bcf4b..d3a4ab3 100644
--- a/linux-core/i915_drv.c
+++ b/linux-core/i915_drv.c
@@ -61,10 +61,10 @@ static struct drm_bo_driver i915_bo_driver = {
.num_mem_type_prio = sizeof(i915_mem_prios)/sizeof(uint32_t),
.num_mem_busy_prio = sizeof(i915_busy_prios)/sizeof(uint32_t),
.create_ttm_backend_entry = i915_create_ttm_backend_entry,
- .fence_type = i915_fence_types,
+ .fence_type = i915_fence_type,
.invalidate_caches = i915_invalidate_caches,
.init_mem_type = i915_init_mem_type,
- .evict_mask = i915_evict_mask,
+ .evict_flags = i915_evict_flags,
.move = i915_move,
.ttm_cache_flush = i915_flush_ttm,
};
diff --git a/linux-core/nouveau_buffer.c b/linux-core/nouveau_buffer.c
index 59751ff..a652bb1 100644
--- a/linux-core/nouveau_buffer.c
+++ b/linux-core/nouveau_buffer.c
@@ -56,7 +56,7 @@ nouveau_bo_fence_type(struct drm_buffer_object *bo,
{
/* When we get called, *fclass is set to the requested fence class */
- if (bo->mem.mask & (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE))
+ if (bo->mem.proposed_flags & (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE))
*type = 3;
else
*type = 1;
@@ -130,8 +130,8 @@ nouveau_bo_init_mem_type(struct drm_device *dev, uint32_t type,
return 0;
}
-static uint32_t
-nouveau_bo_evict_mask(struct drm_buffer_object *bo)
+static uint64_t
+nouveau_bo_evict_flags(struct drm_buffer_object *bo)
{
switch (bo->mem.mem_type) {
case DRM_BO_MEM_LOCAL:
@@ -207,8 +207,9 @@ nouveau_bo_move_gart(struct drm_buffer_object *bo, int evict, int no_wait,
tmp_mem = *new_mem;
tmp_mem.mm_node = NULL;
- tmp_mem.mask = DRM_BO_FLAG_MEM_TT |
- DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING;
+ tmp_mem.proposed_flags = (DRM_BO_FLAG_MEM_TT |
+ DRM_BO_FLAG_CACHED |
+ DRM_BO_FLAG_FORCE_CACHING);
ret = drm_bo_mem_space(bo, &tmp_mem, no_wait);
@@ -291,7 +292,7 @@ struct drm_bo_driver nouveau_bo_driver = {
.fence_type = nouveau_bo_fence_type,
.invalidate_caches = nouveau_bo_invalidate_caches,
.init_mem_type = nouveau_bo_init_mem_type,
- .evict_mask = nouveau_bo_evict_mask,
+ .evict_flags = nouveau_bo_evict_flags,
.move = nouveau_bo_move,
.ttm_cache_flush= nouveau_bo_flush_ttm
};
diff --git a/linux-core/via_buffer.c b/linux-core/via_buffer.c
index ea75524..532fae6 100644
--- a/linux-core/via_buffer.c
+++ b/linux-core/via_buffer.c
@@ -144,7 +144,7 @@ int via_init_mem_type(struct drm_device * dev, uint32_t type,
return 0;
}
-uint32_t via_evict_mask(struct drm_buffer_object *bo)
+uint64_t via_evict_flags(struct drm_buffer_object *bo)
{
switch (bo->mem.mem_type) {
case DRM_BO_MEM_LOCAL:
diff --git a/shared-core/drm.h b/shared-core/drm.h
index 6f6f238..6b4125f 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -662,6 +662,10 @@ struct drm_fence_arg {
#define DRM_BO_FLAG_EXE (1ULL << 2)
/*
+ * All of the bits related to access mode
+ */
+#define DRM_BO_MASK_ACCESS (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE | DRM_BO_FLAG_EXE)
+/*
* Status flags. Can be read to determine the actual state of a buffer.
* Can also be set in the buffer mask before validation.
*/
@@ -741,10 +745,21 @@ struct drm_fence_arg {
#define DRM_BO_FLAG_MEM_PRIV4 (1ULL << 31)
/* We can add more of these now with a 64-bit flag type */
-/* Memory flag mask */
+/*
+ * This is a mask covering all of the memory type flags; easier to just
+ * use a single constant than a bunch of | values. It covers
+ * DRM_BO_FLAG_MEM_LOCAL through DRM_BO_FLAG_MEM_PRIV4
+ */
#define DRM_BO_MASK_MEM 0x00000000FF000000ULL
-#define DRM_BO_MASK_MEMTYPE 0x00000000FF0800A0ULL
-
+/*
+ * This adds all of the CPU-mapping options in with the memory
+ * type to label all bits which change how the page gets mapped
+ */
+#define DRM_BO_MASK_MEMTYPE (DRM_BO_MASK_MEM | \
+ DRM_BO_FLAG_CACHED_MAPPED | \
+ DRM_BO_FLAG_CACHED | \
+ DRM_BO_FLAG_MAPPABLE)
+
/* Driver-private flags */
#define DRM_BO_MASK_DRIVER 0xFFFF000000000000ULL
@@ -794,7 +809,7 @@ struct drm_bo_info_req {
};
struct drm_bo_create_req {
- uint64_t mask;
+ uint64_t flags;
uint64_t size;
uint64_t buffer_start;
unsigned int hint;
@@ -810,7 +825,7 @@ struct drm_bo_create_req {
struct drm_bo_info_rep {
uint64_t flags;
- uint64_t mask;
+ uint64_t proposed_flags;
uint64_t size;
uint64_t offset;
uint64_t arg_handle;
diff --git a/shared-core/i915_drv.h b/shared-core/i915_drv.h
index bdc7841..2bdd4b7 100644
--- a/shared-core/i915_drv.h
+++ b/shared-core/i915_drv.h
@@ -303,12 +303,12 @@ extern int i915_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t f
#ifdef I915_HAVE_BUFFER
/* i915_buffer.c */
extern struct drm_ttm_backend *i915_create_ttm_backend_entry(struct drm_device *dev);
-extern int i915_fence_types(struct drm_buffer_object *bo, uint32_t *fclass,
- uint32_t *type);
+extern int i915_fence_type(struct drm_buffer_object *bo, uint32_t *fclass,
+ uint32_t *type);
extern int i915_invalidate_caches(struct drm_device *dev, uint64_t buffer_flags);
extern int i915_init_mem_type(struct drm_device *dev, uint32_t type,
struct drm_mem_type_manager *man);
-extern uint32_t i915_evict_mask(struct drm_buffer_object *bo);
+extern uint64_t i915_evict_flags(struct drm_buffer_object *bo);
extern int i915_move(struct drm_buffer_object *bo, int evict,
int no_wait, struct drm_bo_mem_reg *new_mem);
void i915_flush_ttm(struct drm_ttm *ttm);
diff --git a/shared-core/via_drv.c b/shared-core/via_drv.c
index 9f09955..6528a7c 100644
--- a/shared-core/via_drv.c
+++ b/shared-core/via_drv.c
@@ -74,7 +74,7 @@ static struct drm_bo_driver via_bo_driver = {
.fence_type = via_fence_types,
.invalidate_caches = via_invalidate_caches,
.init_mem_type = via_init_mem_type,
- .evict_mask = via_evict_mask,
+ .evict_flags = via_evict_flags,
.move = NULL,
};
#endif
diff --git a/shared-core/via_drv.h b/shared-core/via_drv.h
index d6da8bd..39aedb1 100644
--- a/shared-core/via_drv.h
+++ b/shared-core/via_drv.h
@@ -211,7 +211,7 @@ extern int via_fence_types(struct drm_buffer_object *bo, uint32_t *fclass,
extern int via_invalidate_caches(struct drm_device *dev, uint64_t buffer_flags);
extern int via_init_mem_type(struct drm_device *dev, uint32_t type,
struct drm_mem_type_manager *man);
-extern uint32_t via_evict_mask(struct drm_buffer_object *bo);
+extern uint64_t via_evict_flags(struct drm_buffer_object *bo);
extern int via_move(struct drm_buffer_object *bo, int evict,
int no_wait, struct drm_bo_mem_reg *new_mem);
#endif
commit 37fb2ac4071f62bad2c36cc9ca84f9c8feee6bf5
Author: Keith Packard <ke...@ke...>
Date: Sun Dec 16 01:47:51 2007 -0800
Use dummy_read_page for unpopulated kernel-allocated ttm pages.
Previously, dummy_read_page was used only for read-only user allocations; it
filled in pages that were not present in the user address map (presumably,
these were allocated but never written to pages).
This patch allows them to be used for read-only ttms allocated from the
kernel, so that applications can over-allocate buffers without forcing every
page to be allocated.
diff --git a/linux-core/drm_agpsupport.c b/linux-core/drm_agpsupport.c
index e8bfaea..0218701 100644
--- a/linux-core/drm_agpsupport.c
+++ b/linux-core/drm_agpsupport.c
@@ -505,12 +505,14 @@ static int drm_agp_needs_unbind_cache_adjust(struct drm_ttm_backend *backend)
static int drm_agp_populate(struct drm_ttm_backend *backend,
- unsigned long num_pages, struct page **pages)
+ unsigned long num_pages, struct page **pages,
+ struct page *dummy_read_page)
{
struct drm_agp_ttm_backend *agp_be =
container_of(backend, struct drm_agp_ttm_backend, backend);
struct page **cur_page, **last_page = pages + num_pages;
DRM_AGP_MEM *mem;
+ int dummy_page_count = 0;
if (drm_alloc_memctl(num_pages * sizeof(void *)))
return -1;
@@ -528,8 +530,16 @@ static int drm_agp_populate(struct drm_ttm_backend *backend,
DRM_DEBUG("Current page count is %ld\n", (long) mem->page_count);
mem->page_count = 0;
- for (cur_page = pages; cur_page < last_page; ++cur_page)
- mem->memory[mem->page_count++] = phys_to_gart(page_to_phys(*cur_page));
+ for (cur_page = pages; cur_page < last_page; ++cur_page) {
+ struct page *page = *cur_page;
+ if (!page) {
+ page = dummy_read_page;
+ ++dummy_page_count;
+ }
+ mem->memory[mem->page_count++] = phys_to_gart(page_to_phys(page));
+ }
+ if (dummy_page_count)
+ DRM_DEBUG("Mapped %d dummy pages\n", dummy_page_count);
agp_be->mem = mem;
return 0;
}
diff --git a/linux-core/drm_objects.h b/linux-core/drm_objects.h
index 375420d..47b6b01 100644
--- a/linux-core/drm_objects.h
+++ b/linux-core/drm_objects.h
@@ -263,7 +263,8 @@ struct drm_ttm_backend;
struct drm_ttm_backend_func {
int (*needs_ub_cache_adjust) (struct drm_ttm_backend *backend);
int (*populate) (struct drm_ttm_backend *backend,
- unsigned long num_pages, struct page **pages);
+ unsigned long num_pages, struct page **pages,
+ struct page *dummy_read_page);
void (*clear) (struct drm_ttm_backend *backend);
int (*bind) (struct drm_ttm_backend *backend,
struct drm_bo_mem_reg *bo_mem);
diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c
index c1fc13f..a9d8733 100644
--- a/linux-core/drm_ttm.c
+++ b/linux-core/drm_ttm.c
@@ -262,7 +262,6 @@ int drm_ttm_set_user(struct drm_ttm *ttm,
{
struct mm_struct *mm = tsk->mm;
int ret;
- int i;
int write = (ttm->page_flags & DRM_TTM_PAGE_WRITE) != 0;
BUG_ON(num_pages != ttm->num_pages);
@@ -278,11 +277,6 @@ int drm_ttm_set_user(struct drm_ttm *ttm,
return -ENOMEM;
}
- for (i = 0; i < num_pages; ++i) {
- if (ttm->pages[i] == NULL)
- ttm->pages[i] = ttm->dummy_read_page;
- }
-
return 0;
}
@@ -304,12 +298,14 @@ int drm_ttm_populate(struct drm_ttm *ttm)
return 0;
be = ttm->be;
- for (i = 0; i < ttm->num_pages; ++i) {
- page = drm_ttm_get_page(ttm, i);
- if (!page)
- return -ENOMEM;
+ if (ttm->page_flags & DRM_TTM_PAGE_WRITE) {
+ for (i = 0; i < ttm->num_pages; ++i) {
+ page = drm_ttm_get_page(ttm, i);
+ if (!page)
+ return -ENOMEM;
+ }
}
- be->func->populate(be, ttm->num_pages, ttm->pages);
+ be->func->populate(be, ttm->num_pages, ttm->pages, ttm->dummy_read_page);
ttm->state = ttm_unbound;
return 0;
}
diff --git a/linux-core/nouveau_sgdma.c b/linux-core/nouveau_sgdma.c
index f3bf534..6c61819 100644
--- a/linux-core/nouveau_sgdma.c
+++ b/linux-core/nouveau_sgdma.c
@@ -25,7 +25,7 @@ nouveau_sgdma_needs_ub_cache_adjust(struct drm_ttm_backend *be)
static int
nouveau_sgdma_populate(struct drm_ttm_backend *be, unsigned long num_pages,
- struct page **pages)
+ struct page **pages, struct page *dummy_read_page)
{
struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
int p, d, o;
@@ -41,8 +41,11 @@ nouveau_sgdma_populate(struct drm_ttm_backend *be, unsigned long num_pages,
nvbe->pages_populated = d = 0;
for (p = 0; p < num_pages; p++) {
for (o = 0; o < PAGE_SIZE; o += NV_CTXDMA_PAGE_SIZE) {
+ struct page *page = pages[p];
+ if (!page)
+ page = dummy_read_page;
nvbe->pagelist[d] = pci_map_page(nvbe->dev->pdev,
- pages[p], o,
+ page, o,
NV_CTXDMA_PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(nvbe->pagelist[d])) {
@@ -299,7 +302,7 @@ nouveau_sgdma_nottm_hack_init(struct drm_device *dev)
}
dev_priv->gart_info.sg_handle = sgreq.handle;
- if ((ret = be->func->populate(be, dev->sg->pages, dev->sg->pagelist))) {
+ if ((ret = be->func->populate(be, dev->sg->pages, dev->sg->pagelist, dev->bm.dummy_read_page))) {
DRM_ERROR("failed populate: %d\n", ret);
return ret;
}
commit 881ee70ab7bab5d6f6140dc9bf1e19c7b5844084
Author: Keith Packard <ke...@ke...>
Date: Sun Dec 16 01:12:07 2007 -0800
Move dummy_read_page from drm_ttm_set_user to drm_ttm_create.
I'm hoping to use the dummy_read_page for kernel allocated buffers to avoid
allocating extra pages for read-only buffers (like vertex and batch buffers).
This also eliminates the 'write' parameter to drm_ttm_set_user and just
has DRM_TTM_PAGE_WRITE passed into drm_ttm_create.
diff --git a/linux-core/drm_bo.c b/linux-core/drm_bo.c
index eced94e..e7b9c5b 100644
--- a/linux-core/drm_bo.c
+++ b/linux-core/drm_bo.c
@@ -137,27 +137,32 @@ static int drm_bo_add_ttm(struct drm_buffer_object *bo)
{
struct drm_device *dev = bo->dev;
int ret = 0;
+ uint32_t page_flags = 0;
DRM_ASSERT_LOCKED(&bo->mutex);
bo->ttm = NULL;
+ if (bo->mem.mask & DRM_BO_FLAG_WRITE)
+ page_flags |= DRM_TTM_PAGE_WRITE;
+
switch (bo->type) {
case drm_bo_type_dc:
case drm_bo_type_kernel:
- bo->ttm = drm_ttm_create(dev, bo->num_pages << PAGE_SHIFT, 0);
+ bo->ttm = drm_ttm_create(dev, bo->num_pages << PAGE_SHIFT,
+ page_flags, dev->bm.dummy_read_page);
if (!bo->ttm)
ret = -ENOMEM;
break;
case drm_bo_type_user:
- bo->ttm = drm_ttm_create(dev, bo->num_pages << PAGE_SHIFT, DRM_TTM_PAGE_USER);
+ bo->ttm = drm_ttm_create(dev, bo->num_pages << PAGE_SHIFT,
+ page_flags | DRM_TTM_PAGE_USER,
+ dev->bm.dummy_read_page);
if (!bo->ttm)
ret = -ENOMEM;
ret = drm_ttm_set_user(bo->ttm, current,
- bo->mem.mask & DRM_BO_FLAG_WRITE,
bo->buffer_start,
- bo->num_pages,
- dev->bm.dummy_read_page);
+ bo->num_pages);
if (ret)
return ret;
diff --git a/linux-core/drm_objects.h b/linux-core/drm_objects.h
index fa029d8..375420d 100644
--- a/linux-core/drm_objects.h
+++ b/linux-core/drm_objects.h
@@ -297,7 +297,9 @@ struct drm_ttm {
};
-extern struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size, uint32_t page_flags);
+extern struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size,
+ uint32_t page_flags,
+ struct page *dummy_read_page);
extern int drm_ttm_bind(struct drm_ttm *ttm, struct drm_bo_mem_reg *bo_mem);
extern void drm_ttm_unbind(struct drm_ttm *ttm);
extern void drm_ttm_evict(struct drm_ttm *ttm);
@@ -307,10 +309,8 @@ extern void drm_ttm_cache_flush(void);
extern int drm_ttm_populate(struct drm_ttm *ttm);
extern int drm_ttm_set_user(struct drm_ttm *ttm,
struct task_struct *tsk,
- int write,
unsigned long start,
- unsigned long num_pages,
- struct page *dummy_read_page);
+ unsigned long num_pages);
/*
* Destroy a ttm. The user normally calls drmRmMap or a similar IOCTL to do
@@ -362,7 +362,7 @@ extern int drm_ttm_destroy(struct drm_ttm *ttm);
/*
* This ttm will be written to by the GPU
*/
-#define DRM_TTM_PAGE_USER_WRITE (1 << 6)
+#define DRM_TTM_PAGE_WRITE (1 << 6)
/*
* This ttm was mapped to the GPU, and so the contents may have
* been modified
diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c
index e3b9fcc..c1fc13f 100644
--- a/linux-core/drm_ttm.c
+++ b/linux-core/drm_ttm.c
@@ -145,7 +145,7 @@ static void drm_ttm_free_user_pages(struct drm_ttm *ttm)
int i;
BUG_ON(!(ttm->page_flags & DRM_TTM_PAGE_USER));
- write = ((ttm->page_flags & DRM_TTM_PAGE_USER_WRITE) != 0);
+ write = ((ttm->page_flags & DRM_TTM_PAGE_WRITE) != 0);
dirty = ((ttm->page_flags & DRM_TTM_PAGE_USER_DIRTY) != 0);
for (i = 0; i < ttm->num_pages; ++i) {
@@ -257,22 +257,17 @@ EXPORT_SYMBOL(drm_ttm_get_page);
*/
int drm_ttm_set_user(struct drm_ttm *ttm,
struct task_struct *tsk,
- int write,
unsigned long start,
- unsigned long num_pages,
- struct page *dummy_read_page)
+ unsigned long num_pages)
{
struct mm_struct *mm = tsk->mm;
int ret;
int i;
+ int write = (ttm->page_flags & DRM_TTM_PAGE_WRITE) != 0;
BUG_ON(num_pages != ttm->num_pages);
BUG_ON((ttm->page_flags & DRM_TTM_PAGE_USER) == 0);
- ttm->dummy_read_page = dummy_read_page;
- if (write)
- ttm->page_flags |= DRM_TTM_PAGE_USER_WRITE;
-
down_read(&mm->mmap_sem);
ret = get_user_pages(tsk, mm, start, num_pages,
write, 0, ttm->pages, NULL);
@@ -331,7 +326,8 @@ int drm_ttm_populate(struct drm_ttm *ttm)
* Allocate and initialize a ttm, leaving it unpopulated at this time
*/
-struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size, uint32_t page_flags)
+struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size,
+ uint32_t page_flags, struct page *dummy_read_page)
{
struct drm_bo_driver *bo_driver = dev->driver->bo_driver;
struct drm_ttm *ttm;
@@ -351,6 +347,8 @@ struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size, uint3
ttm->page_flags = page_flags;
+ ttm->dummy_read_page = dummy_read_page;
+
/*
* Account also for AGP module memory usage.
*/
commit 6d44f48002c19d67187adb660ef74dd1870d52c2
Author: Keith Packard <ke...@ke...>
Date: Sun Dec 16 00:54:25 2007 -0800
Clean up and document drm_ttm.c APIs. drm_bind_ttm -> drm_ttm_bind.
Aside from changing drm_bind_ttm to drm_ttm_bind, this patch
adds only documentation and fixes the functions inside drm_ttm.c
to all be prefixed with drm_ttm_.
diff --git a/linux-core/drm_bo.c b/linux-core/drm_bo.c
index 7033a8b..eced94e 100644
--- a/linux-core/drm_bo.c
+++ b/linux-core/drm_bo.c
@@ -199,7 +199,7 @@ static int drm_bo_handle_move_mem(struct drm_buffer_object *bo,
goto out_err;
if (mem->mem_type != DRM_BO_MEM_LOCAL) {
- ret = drm_bind_ttm(bo->ttm, mem);
+ ret = drm_ttm_bind(bo->ttm, mem);
if (ret)
goto out_err;
}
diff --git a/linux-core/drm_bo_move.c b/linux-core/drm_bo_move.c
index 00d8d3e..4afdfbb 100644
--- a/linux-core/drm_bo_move.c
+++ b/linux-core/drm_bo_move.c
@@ -71,7 +71,7 @@ int drm_bo_move_ttm(struct drm_buffer_object *bo,
save_flags = old_mem->flags;
}
if (new_mem->mem_type != DRM_BO_MEM_LOCAL) {
- ret = drm_bind_ttm(ttm, new_mem);
+ ret = drm_ttm_bind(ttm, new_mem);
if (ret)
return ret;
}
diff --git a/linux-core/drm_objects.h b/linux-core/drm_objects.h
index 0926b47..fa029d8 100644
--- a/linux-core/drm_objects.h
+++ b/linux-core/drm_objects.h
@@ -298,7 +298,7 @@ struct drm_ttm {
};
extern struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size, uint32_t page_flags);
-extern int drm_bind_ttm(struct drm_ttm *ttm, struct drm_bo_mem_reg *bo_mem);
+extern int drm_ttm_bind(struct drm_ttm *ttm, struct drm_bo_mem_reg *bo_mem);
extern void drm_ttm_unbind(struct drm_ttm *ttm);
extern void drm_ttm_evict(struct drm_ttm *ttm);
extern void drm_ttm_fixup_caching(struct drm_ttm *ttm);
@@ -331,14 +331,47 @@ extern int drm_ttm_destroy(struct drm_ttm *ttm);
* Page flags.
*/
+/*
+ * This ttm should not be cached by the CPU
+ */
#define DRM_TTM_PAGE_UNCACHED (1 << 0)
+/*
+ * This flat is not used at this time; I don't know what the
+ * intent was
+ */
#define DRM_TTM_PAGE_USED (1 << 1)
+/*
+ * This flat is not used at this time; I don't know what the
+ * intent was
+ */
#define DRM_TTM_PAGE_BOUND (1 << 2)
+/*
+ * This flat is not used at this time; I don't know what the
+ * intent was
+ */
#define DRM_TTM_PAGE_PRESENT (1 << 3)
+/*
+ * The array of page pointers was allocated with vmalloc
+ * instead of drm_calloc.
+ */
#define DRM_TTM_PAGE_VMALLOC (1 << 4)
+/*
+ * This ttm is mapped from user space
+ */
#define DRM_TTM_PAGE_USER (1 << 5)
-#define DRM_TTM_PAGE_USER_WRITE (1 << 6)
+/*
+ * This ttm will be written to by the GPU
+ */
+#define DRM_TTM_PAGE_USER_WRITE (1 << 6)
+/*
+ * This ttm was mapped to the GPU, and so the contents may have
+ * been modified
+ */
#define DRM_TTM_PAGE_USER_DIRTY (1 << 7)
+/*
+ * This flag is not used at this time; I don't know what the
+ * intent was.
+ */
#define DRM_TTM_PAGE_USER_DMA (1 << 8)
/***************************************************
diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c
index 4c1b327..e3b9fcc 100644
--- a/linux-core/drm_ttm.c
+++ b/linux-core/drm_ttm.c
@@ -46,7 +46,7 @@ EXPORT_SYMBOL(drm_ttm_cache_flush);
* Use kmalloc if possible. Otherwise fall back to vmalloc.
*/
-static void ttm_alloc_pages(struct drm_ttm *ttm)
+static void drm_ttm_alloc_pages(struct drm_ttm *ttm)
{
unsigned long size = ttm->num_pages * sizeof(*ttm->pages);
ttm->pages = NULL;
@@ -66,7 +66,7 @@ static void ttm_alloc_pages(struct drm_ttm *ttm)
drm_free_memctl(size);
}
-static void ttm_free_pages(struct drm_ttm *ttm)
+static void drm_ttm_free_pages(struct drm_ttm *ttm)
{
unsigned long size = ttm->num_pages * sizeof(*ttm->pages);
@@ -103,7 +103,7 @@ static struct page *drm_ttm_alloc_page(void)
* for range of pages in a ttm.
*/
-static int drm_set_caching(struct drm_ttm *ttm, int noncached)
+static int drm_ttm_set_caching(struct drm_ttm *ttm, int noncached)
{
int i;
struct page **cur_page;
@@ -208,14 +208,14 @@ int drm_ttm_destroy(struct drm_ttm *ttm)
if (ttm->pages) {
if (ttm->page_flags & DRM_TTM_PAGE_UNCACHED)
- drm_set_caching(ttm, 0);
+ drm_ttm_set_caching(ttm, 0);
if (ttm->page_flags & DRM_TTM_PAGE_USER)
drm_ttm_free_user_pages(ttm);
else
drm_ttm_free_alloced_pages(ttm);
- ttm_free_pages(ttm);
+ drm_ttm_free_pages(ttm);
}
drm_ctl_free(ttm, sizeof(*ttm), DRM_MEM_TTM);
@@ -291,6 +291,14 @@ int drm_ttm_set_user(struct drm_ttm *ttm,
return 0;
}
+/**
+ * drm_ttm_populate:
+ *
+ * @ttm: the object to allocate pages for
+ *
+ * Allocate pages for all unset page entries, then
+ * call the backend to create the hardware mappings
+ */
int drm_ttm_populate(struct drm_ttm *ttm)
{
struct page *page;
@@ -311,8 +319,16 @@ int drm_ttm_populate(struct drm_ttm *ttm)
return 0;
}
-/*
- * Initialize a ttm.
+/**
+ * drm_ttm_create:
+ *
+ * @dev: the drm_device
+ *
+ * @size: The size (in bytes) of the desired object
+ *
+ * @page_flags: various DRM_TTM_PAGE_* flags. See drm_object.h.
+ *
+ * Allocate and initialize a ttm, leaving it unpopulated at this time
*/
struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size, uint32_t page_flags)
@@ -339,7 +355,7 @@ struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size, uint3
* Account also for AGP module memory usage.
*/
- ttm_alloc_pages(ttm);
+ drm_ttm_alloc_pages(ttm);
if (!ttm->pages) {
drm_ttm_destroy(ttm);
DRM_ERROR("Failed allocating page table\n");
@@ -355,10 +371,15 @@ struct drm_ttm *drm_ttm_create(struct drm_device *dev, unsigned long size, uint3
return ttm;
}
-/*
- * Unbind a ttm region from the aperture.
+/**
+ * drm_ttm_evict:
+ *
+ * @ttm: the object to be unbound from the aperture.
+ *
+ * Transition a ttm from bound to evicted, where it
+ * isn't present in the aperture, but various caches may
+ * not be consistent.
*/
-
void drm_ttm_evict(struct drm_ttm *ttm)
{
struct drm_ttm_backend *be = ttm->be;
@@ -372,17 +393,33 @@ void drm_ttm_evict(struct drm_ttm *ttm)
ttm->state = ttm_evicted;
}
+/**
+ * drm_ttm_fixup_caching:
+ *
+ * @ttm: the object to set unbound
+ *
+ * XXX this function is misnamed. Transition a ttm from evicted to
+ * unbound, flushing caches as appropriate.
+ */
void drm_ttm_fixup_caching(struct drm_ttm *ttm)
{
if (ttm->state == ttm_evicted) {
struct drm_ttm_backend *be = ttm->be;
if (be->func->needs_ub_cache_adjust(be))
- drm_set_caching(ttm, 0);
+ drm_ttm_set_caching(ttm, 0);
ttm->state = ttm_unbound;
}
}
+/**
+ * drm_ttm_unbind:
+ *
+ * @ttm: the object to unbind from the graphics device
+ *
+ * Unbind an object from the aperture. This removes the mappings
+ * from the graphics device and flushes caches if necessary.
+ */
void drm_ttm_unbind(struct drm_ttm *ttm)
{
if (ttm->state == ttm_bound)
@@ -391,7 +428,19 @@ void drm_ttm_unbind(struct drm_ttm *ttm)
drm_ttm_fixup_caching(ttm);
}
-int drm_bind_ttm(struct drm_ttm *ttm, struct drm_bo_mem_reg *bo_mem)
+/**
+ * drm_ttm_bind:
+ *
+ * @ttm: the ttm object to bind to the graphics device
+ *
+ * @bo_mem: the aperture memory region which will hold the object
+ *
+ * Bind a ttm object to the aperture. This ensures that the necessary
+ * pages are allocated, flushes CPU caches as needed and marks the
+ * ttm as DRM_TTM_PAGE_USER_DIRTY to indicate that it may have been
+ * modified by the GPU
+ */
+int drm_ttm_bind(struct drm_ttm *ttm, struct drm_bo_mem_reg *bo_mem)
{
struct drm_bo_driver *bo_driver = ttm->dev->driver->bo_driver;
int ret = 0;
@@ -409,7 +458,7 @@ int drm_bind_ttm(struct drm_ttm *ttm, struct drm_bo_mem_reg *bo_mem)
return ret;
if (ttm->state == ttm_unbound && !(bo_mem->flags & DRM_BO_FLAG_CACHED))
- drm_set_caching(ttm, DRM_TTM_PAGE_UNCACHED);
+ drm_ttm_set_caching(ttm, DRM_TTM_PAGE_UNCACHED);
else if ((bo_mem->flags & DRM_BO_FLAG_CACHED_MAPPED) &&
bo_driver->ttm_cache_flush)
bo_driver->ttm_cache_flush(ttm);
@@ -426,4 +475,4 @@ int drm_bind_ttm(struct drm_ttm *ttm, struct drm_bo_mem_reg *bo_mem)
ttm->page_flags |= DRM_TTM_PAGE_USER_DIRTY;
return 0;
}
-EXPORT_SYMBOL(drm_bind_ttm);
+EXPORT_SYMBOL(drm_ttm_bind);
diff --git a/linux-core/nouveau_buffer.c b/linux-core/nouveau_buffer.c
index 9b252a0..59751ff 100644
--- a/linux-core/nouveau_buffer.c
+++ b/linux-core/nouveau_buffer.c
@@ -215,7 +215,7 @@ nouveau_bo_move_gart(struct drm_buffer_object *bo, int evict, int no_wait,
if (ret)
return ret;
- ret = drm_bind_ttm(bo->ttm, &tmp_mem);
+ ret = drm_ttm_bind (bo->ttm, &tmp_mem);
if (ret)
goto out_cleanup;
|