[PATCH 29/33] drm/vmwgfx: Use the linux DMA api also for MOBs
Thomas Hellstrom
thellstrom at vmware.com
Thu Jan 16 12:39:17 PST 2014
Signed-off-by: Thomas Hellstrom <thellstrom at vmware.com>
---
drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c | 61 +++++++++++++++++-
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 8 ++-
drivers/gpu/drm/vmwgfx/vmwgfx_mob.c | 114 ++++++++++++++++++++++-----------
3 files changed, 142 insertions(+), 41 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
index e4f5b92..6327cfc 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
@@ -272,6 +272,7 @@ void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
viter->dma_address = &__vmw_piter_dma_addr;
viter->page = &__vmw_piter_non_sg_page;
viter->addrs = vsgt->addrs;
+ viter->pages = vsgt->pages;
break;
case vmw_dma_map_populate:
case vmw_dma_map_bind:
@@ -452,6 +453,63 @@ static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
vmw_tt->mapped = false;
}
+
+/**
+ * vmw_bo_map_dma - Make sure buffer object pages are visible to the device
+ *
+ * @bo: Pointer to a struct ttm_buffer_object
+ *
+ * Wrapper around vmw_ttm_map_dma, that takes a TTM buffer object pointer
+ * instead of a pointer to a struct vmw_ttm_backend as argument.
+ * Note that the buffer object must be either pinned or reserved before
+ * calling this function.
+ */
+int vmw_bo_map_dma(struct ttm_buffer_object *bo)
+{
+ struct vmw_ttm_tt *vmw_tt =
+ container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+
+ return vmw_ttm_map_dma(vmw_tt);
+}
+
+
+/**
+ * vmw_bo_unmap_dma - Make sure buffer object pages are visible to the device
+ *
+ * @bo: Pointer to a struct ttm_buffer_object
+ *
+ * Wrapper around vmw_ttm_unmap_dma, that takes a TTM buffer object pointer
+ * instead of a pointer to a struct vmw_ttm_backend as argument.
+ */
+void vmw_bo_unmap_dma(struct ttm_buffer_object *bo)
+{
+ struct vmw_ttm_tt *vmw_tt =
+ container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+
+ vmw_ttm_unmap_dma(vmw_tt);
+}
+
+
+/**
+ * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
+ * TTM buffer object
+ *
+ * @bo: Pointer to a struct ttm_buffer_object
+ *
+ * Returns a pointer to a struct vmw_sg_table object. The object should
+ * not be freed after use.
+ * Note that for the device addresses to be valid, the buffer object must
+ * either be reserved or pinned.
+ */
+const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
+{
+ struct vmw_ttm_tt *vmw_tt =
+ container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
+
+ return &vmw_tt->vsgt;
+}
+
+
static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
{
struct vmw_ttm_tt *vmw_be =
@@ -478,7 +536,7 @@ static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
}
return vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
- ttm->pages, ttm->num_pages,
+ &vmw_be->vsgt, ttm->num_pages,
vmw_be->gmr_id);
default:
BUG();
@@ -526,6 +584,7 @@ static void vmw_ttm_destroy(struct ttm_tt *ttm)
kfree(vmw_be);
}
+
static int vmw_ttm_populate(struct ttm_tt *ttm)
{
struct vmw_ttm_tt *vmw_tt =
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 18ece4f..2fe0acb 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -708,6 +708,10 @@ extern struct ttm_placement vmw_srf_placement;
extern struct ttm_placement vmw_mob_placement;
extern struct ttm_bo_driver vmw_bo_driver;
extern int vmw_dma_quiescent(struct drm_device *dev);
+extern int vmw_bo_map_dma(struct ttm_buffer_object *bo);
+extern void vmw_bo_unmap_dma(struct ttm_buffer_object *bo);
+extern const struct vmw_sg_table *
+vmw_bo_sg_table(struct ttm_buffer_object *bo);
extern void vmw_piter_start(struct vmw_piter *viter,
const struct vmw_sg_table *vsgt,
unsigned long p_offs);
@@ -919,8 +923,8 @@ extern int vmw_prime_handle_to_fd(struct drm_device *dev,
*/
struct vmw_mob;
extern int vmw_mob_bind(struct vmw_private *dev_priv, struct vmw_mob *mob,
- struct page **data_pages, unsigned long num_data_pages,
- int32_t mob_id);
+ const struct vmw_sg_table *vsgt,
+ unsigned long num_data_pages, int32_t mob_id);
extern void vmw_mob_unbind(struct vmw_private *dev_priv,
struct vmw_mob *mob);
extern void vmw_mob_destroy(struct vmw_mob *mob);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
index 3445086..db03527 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
@@ -41,13 +41,13 @@
*
* @num_pages Number of pages that make up the page table.
* @pt_level The indirection level of the page table. 0-2.
- * @pt_root_page Pointer to the level 0 page of the page table.
+ * @pt_root_page DMA address of the level 0 page of the page table.
*/
struct vmw_mob {
struct ttm_buffer_object *pt_bo;
unsigned long num_pages;
unsigned pt_level;
- struct page *pt_root_page;
+ dma_addr_t pt_root_page;
uint32_t id;
};
@@ -65,7 +65,7 @@ struct vmw_otable {
static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
struct vmw_mob *mob);
static void vmw_mob_pt_setup(struct vmw_mob *mob,
- struct page **data_pages,
+ struct vmw_piter data_iter,
unsigned long num_data_pages);
/*
@@ -89,13 +89,17 @@ static int vmw_setup_otable_base(struct vmw_private *dev_priv,
SVGA3dCmdHeader header;
SVGA3dCmdSetOTableBase body;
} *cmd;
- struct page **pages = dev_priv->otable_bo->ttm->pages +
- (offset >> PAGE_SHIFT);
struct vmw_mob *mob;
+ const struct vmw_sg_table *vsgt;
+ struct vmw_piter iter;
int ret;
BUG_ON(otable->page_table != NULL);
+ vsgt = vmw_bo_sg_table(dev_priv->otable_bo);
+ vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT);
+ WARN_ON(!vmw_piter_next(&iter));
+
mob = vmw_mob_create(otable->size >> PAGE_SHIFT);
if (unlikely(mob == NULL)) {
DRM_ERROR("Failed creating OTable page table.\n");
@@ -103,15 +107,17 @@ static int vmw_setup_otable_base(struct vmw_private *dev_priv,
}
if (otable->size <= PAGE_SIZE) {
- mob->pt_level = 0;
- mob->pt_root_page = pages[0];
+ mob->pt_level = SVGA3D_MOBFMT_PTDEPTH_0;
+ mob->pt_root_page = vmw_piter_dma_addr(&iter);
+ } else if (vsgt->num_regions == 1) {
+ mob->pt_level = SVGA3D_MOBFMT_RANGE;
+ mob->pt_root_page = vmw_piter_dma_addr(&iter);
} else {
ret = vmw_mob_pt_populate(dev_priv, mob);
if (unlikely(ret != 0))
goto out_no_populate;
- vmw_mob_pt_setup(mob, pages,
- otable->size >> PAGE_SHIFT);
+ vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT);
}
cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
@@ -124,7 +130,7 @@ static int vmw_setup_otable_base(struct vmw_private *dev_priv,
cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE;
cmd->header.size = sizeof(cmd->body);
cmd->body.type = type;
- cmd->body.baseAddress = page_to_pfn(mob->pt_root_page);
+ cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT;
cmd->body.sizeInBytes = otable->size;
cmd->body.validSizeInBytes = 0;
cmd->body.ptDepth = mob->pt_level;
@@ -244,9 +250,13 @@ int vmw_otables_setup(struct vmw_private *dev_priv)
ret = ttm_bo_reserve(dev_priv->otable_bo, false, true, false, false);
BUG_ON(ret != 0);
ret = vmw_bo_driver.ttm_tt_populate(dev_priv->otable_bo->ttm);
- ttm_bo_unreserve(dev_priv->otable_bo);
if (unlikely(ret != 0))
- goto out_no_setup;
+ goto out_unreserve;
+ ret = vmw_bo_map_dma(dev_priv->otable_bo);
+ if (unlikely(ret != 0))
+ goto out_unreserve;
+
+ ttm_bo_unreserve(dev_priv->otable_bo);
offset = 0;
for (i = 0; i < SVGA_OTABLE_COUNT; ++i) {
@@ -260,6 +270,8 @@ int vmw_otables_setup(struct vmw_private *dev_priv)
dev_priv->otables = otables;
return 0;
+out_unreserve:
+ ttm_bo_unreserve(dev_priv->otable_bo);
out_no_setup:
for (i = 0; i < SVGA_OTABLE_COUNT; ++i)
vmw_takedown_otable_base(dev_priv, i, &otables[i]);
@@ -365,9 +377,19 @@ static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
BUG_ON(ret != 0);
ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm);
- ttm_bo_unreserve(mob->pt_bo);
if (unlikely(ret != 0))
- ttm_bo_unref(&mob->pt_bo);
+ goto out_unreserve;
+ ret = vmw_bo_map_dma(mob->pt_bo);
+ if (unlikely(ret != 0))
+ goto out_unreserve;
+
+ ttm_bo_unreserve(mob->pt_bo);
+
+ return 0;
+
+out_unreserve:
+ ttm_bo_unreserve(mob->pt_bo);
+ ttm_bo_unref(&mob->pt_bo);
return ret;
}
@@ -376,7 +398,7 @@ static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
/*
* vmw_mob_build_pt - Build a pagetable
*
- * @data_pages: Array of page pointers to the underlying buffer
+ * @data_addr: Array of DMA addresses to the underlying buffer
* object's data pages.
* @num_data_pages: Number of buffer object data pages.
* @pt_pages: Array of page pointers to the page table pages.
@@ -384,26 +406,31 @@ static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
* Returns the number of page table pages actually used.
* Uses atomic kmaps of highmem pages to avoid TLB thrashing.
*/
-static unsigned long vmw_mob_build_pt(struct page **data_pages,
+static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter,
unsigned long num_data_pages,
- struct page **pt_pages)
+ struct vmw_piter *pt_iter)
{
unsigned long pt_size = num_data_pages * VMW_PPN_SIZE;
unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE);
- unsigned long pt_page, data_page;
+ unsigned long pt_page;
uint32_t *addr, *save_addr;
unsigned long i;
+ struct page *page;
- data_page = 0;
for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) {
- save_addr = addr = kmap_atomic(pt_pages[pt_page]);
+ page = vmw_piter_page(pt_iter);
+
+ save_addr = addr = kmap_atomic(page);
for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) {
- *addr++ = page_to_pfn(data_pages[data_page++]);
- if (unlikely(data_page >= num_data_pages))
+ u32 tmp = vmw_piter_dma_addr(data_iter) >> PAGE_SHIFT;
+ *addr++ = tmp;
+ if (unlikely(--num_data_pages == 0))
break;
+ WARN_ON(!vmw_piter_next(data_iter));
}
kunmap_atomic(save_addr);
+ vmw_piter_next(pt_iter);
}
return num_pt_pages;
@@ -413,38 +440,41 @@ static unsigned long vmw_mob_build_pt(struct page **data_pages,
* vmw_mob_build_pt - Set up a multilevel mob pagetable
*
* @mob: Pointer to a mob whose page table needs setting up.
- * @data_pages Array of page pointers to the buffer object's data
+ * @data_addr Array of DMA addresses to the buffer object's data
* pages.
* @num_data_pages: Number of buffer object data pages.
*
* Uses tail recursion to set up a multilevel mob page table.
*/
static void vmw_mob_pt_setup(struct vmw_mob *mob,
- struct page **data_pages,
+ struct vmw_piter data_iter,
unsigned long num_data_pages)
{
- struct page **pt_pages;
unsigned long num_pt_pages = 0;
struct ttm_buffer_object *bo = mob->pt_bo;
+ struct vmw_piter save_pt_iter;
+ struct vmw_piter pt_iter;
+ const struct vmw_sg_table *vsgt;
int ret;
ret = ttm_bo_reserve(bo, false, true, false, 0);
BUG_ON(ret != 0);
- pt_pages = bo->ttm->pages;
+ vsgt = vmw_bo_sg_table(bo);
+ vmw_piter_start(&pt_iter, vsgt, 0);
+ BUG_ON(!vmw_piter_next(&pt_iter));
mob->pt_level = 0;
while (likely(num_data_pages > 1)) {
++mob->pt_level;
BUG_ON(mob->pt_level > 2);
-
- pt_pages += num_pt_pages;
- num_pt_pages = vmw_mob_build_pt(data_pages, num_data_pages,
- pt_pages);
- data_pages = pt_pages;
+ save_pt_iter = pt_iter;
+ num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages,
+ &pt_iter);
+ data_iter = save_pt_iter;
num_data_pages = num_pt_pages;
}
- mob->pt_root_page = *pt_pages;
+ mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter);
ttm_bo_unreserve(bo);
}
@@ -506,7 +536,7 @@ void vmw_mob_unbind(struct vmw_private *dev_priv,
*
* @dev_priv: Pointer to a device private.
* @mob: Pointer to the mob we're making visible.
- * @data_pages: Array of pointers to the data pages of the underlying
+ * @data_addr: Array of DMA addresses to the data pages of the underlying
* buffer object.
* @num_data_pages: Number of data pages of the underlying buffer
* object.
@@ -517,27 +547,35 @@ void vmw_mob_unbind(struct vmw_private *dev_priv,
*/
int vmw_mob_bind(struct vmw_private *dev_priv,
struct vmw_mob *mob,
- struct page **data_pages,
+ const struct vmw_sg_table *vsgt,
unsigned long num_data_pages,
int32_t mob_id)
{
int ret;
bool pt_set_up = false;
+ struct vmw_piter data_iter;
struct {
SVGA3dCmdHeader header;
SVGA3dCmdDefineGBMob body;
} *cmd;
mob->id = mob_id;
+ vmw_piter_start(&data_iter, vsgt, 0);
+ if (unlikely(!vmw_piter_next(&data_iter)))
+ return 0;
+
if (likely(num_data_pages == 1)) {
- mob->pt_level = 0;
- mob->pt_root_page = *data_pages;
+ mob->pt_level = SVGA3D_MOBFMT_PTDEPTH_0;
+ mob->pt_root_page = vmw_piter_dma_addr(&data_iter);
+ } else if (vsgt->num_regions == 1) {
+ mob->pt_level = SVGA3D_MOBFMT_RANGE;
+ mob->pt_root_page = vmw_piter_dma_addr(&data_iter);
} else if (unlikely(mob->pt_bo == NULL)) {
ret = vmw_mob_pt_populate(dev_priv, mob);
if (unlikely(ret != 0))
return ret;
- vmw_mob_pt_setup(mob, data_pages, num_data_pages);
+ vmw_mob_pt_setup(mob, data_iter, num_data_pages);
pt_set_up = true;
}
@@ -554,7 +592,7 @@ int vmw_mob_bind(struct vmw_private *dev_priv,
cmd->header.size = sizeof(cmd->body);
cmd->body.mobid = mob_id;
cmd->body.ptDepth = mob->pt_level;
- cmd->body.base = page_to_pfn(mob->pt_root_page);
+ cmd->body.base = mob->pt_root_page >> PAGE_SHIFT;
cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE;
vmw_fifo_commit(dev_priv, sizeof(*cmd));
--
1.8.3.2
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