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Subject[PATCH 11/29] gma500: nuke the last bits of TTM code
Date
From: Alan Cox <alan@linux.intel.com>

We don't seem to need this for our task.

Signed-off-by: Alan Cox <alan@linux.intel.com>
---
drivers/staging/gma500/psb_drv.c | 6 ----
drivers/staging/gma500/psb_gtt.c | 62 ++++++++++++--------------------------
2 files changed, 19 insertions(+), 49 deletions(-)
diff --git a/drivers/staging/gma500/psb_drv.c b/drivers/staging/gma500/psb_drv.c
index 9bd0a5d..ab1da30 100644
--- a/drivers/staging/gma500/psb_drv.c
+++ b/drivers/staging/gma500/psb_drv.c
@@ -409,8 +409,6 @@ static int psb_do_init(struct drm_device *dev)
struct psb_gtt *pg = dev_priv->pg;

uint32_t stolen_gtt;
- uint32_t tt_start;
- uint32_t tt_pages;

int ret = -ENOMEM;

@@ -449,10 +447,6 @@ static int psb_do_init(struct drm_device *dev)

spin_lock_init(&dev_priv->irqmask_lock);

- tt_pages = (pg->gatt_pages < PSB_TT_PRIV0_PLIMIT) ?
- pg->gatt_pages : PSB_TT_PRIV0_PLIMIT;
- tt_start = dev_priv->gatt_free_offset - pg->mmu_gatt_start;
- tt_pages -= tt_start >> PAGE_SHIFT;
/* FIXME: can we kill ta_mem_size ? */
dev_priv->sizes.ta_mem_size = 0;

diff --git a/drivers/staging/gma500/psb_gtt.c b/drivers/staging/gma500/psb_gtt.c
index 5a296e1..8fcb833 100644
--- a/drivers/staging/gma500/psb_gtt.c
+++ b/drivers/staging/gma500/psb_gtt.c
@@ -138,8 +138,6 @@ static void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r)
*
* Pin and build an in kernel list of the pages that back our GEM object.
* While we hold this the pages cannot be swapped out
- *
- * FIXME: Do we need to cache flush when we update the GTT
*/
static int psb_gtt_attach_pages(struct gtt_range *gt)
{
@@ -185,8 +183,6 @@ err:
* Undo the effect of psb_gtt_attach_pages. At this point the pages
* must have been removed from the GTT as they could now be paged out
* and move bus address.
- *
- * FIXME: Do we need to cache flush when we update the GTT
*/
static void psb_gtt_detach_pages(struct gtt_range *gt)
{
@@ -194,7 +190,6 @@ static void psb_gtt_detach_pages(struct gtt_range *gt)
for (i = 0; i < gt->npage; i++) {
/* FIXME: do we need to force dirty */
set_page_dirty(gt->pages[i]);
- /* Undo the reference we took when populating the table */
page_cache_release(gt->pages[i]);
}
kfree(gt->pages);
@@ -384,7 +379,6 @@ void psb_gtt_takedown(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = dev->dev_private;

- /* FIXME: iounmap dev_priv->vram_addr etc */
if (dev_priv->gtt_map) {
iounmap(dev_priv->gtt_map);
dev_priv->gtt_map = NULL;
@@ -395,6 +389,8 @@ void psb_gtt_takedown(struct drm_device *dev)
PSB_WVDC32(dev_priv->pge_ctl, PSB_PGETBL_CTL);
(void) PSB_RVDC32(PSB_PGETBL_CTL);
}
+ if (dev_priv->vram_addr)
+ iounmap(dev_priv->gtt_map);
kfree(dev_priv->pg);
dev_priv->pg = NULL;
}
@@ -407,8 +403,6 @@ int psb_gtt_init(struct drm_device *dev, int resume)
unsigned i, num_pages;
unsigned pfn_base;
uint32_t vram_pages;
- uint32_t tt_pages;
- uint32_t *ttm_gtt_map;
uint32_t dvmt_mode = 0;
struct psb_gtt *pg;

@@ -421,6 +415,7 @@ int psb_gtt_init(struct drm_device *dev, int resume)
if (pg == NULL)
return -ENOMEM;

+ /* Enable the GTT */
pci_read_config_word(dev->pdev, PSB_GMCH_CTRL, &dev_priv->gmch_ctrl);
pci_write_config_word(dev->pdev, PSB_GMCH_CTRL,
dev_priv->gmch_ctrl | _PSB_GMCH_ENABLED);
@@ -431,30 +426,26 @@ int psb_gtt_init(struct drm_device *dev, int resume)

/* The root resource we allocate address space from */
dev_priv->gtt_mem = &dev->pdev->resource[PSB_GATT_RESOURCE];
-
dev_priv->gtt_initialized = 1;

pg->gtt_phys_start = dev_priv->pge_ctl & PAGE_MASK;

pg->gatt_start = pci_resource_start(dev->pdev, PSB_GATT_RESOURCE);
- /* fix me: video mmu has hw bug to access 0x0D0000000,
- * then make gatt start at 0x0e000,0000 */
+ /*
+ * FIXME: video mmu has hw bug to access 0x0D0000000,
+ * then make gatt start at 0x0e000,0000
+ */
pg->mmu_gatt_start = 0xE0000000;
+
pg->gtt_start = pci_resource_start(dev->pdev, PSB_GTT_RESOURCE);
- gtt_pages =
- pci_resource_len(dev->pdev, PSB_GTT_RESOURCE) >> PAGE_SHIFT;
- pg->gatt_pages = pci_resource_len(dev->pdev, PSB_GATT_RESOURCE)
- >> PAGE_SHIFT;
+ gtt_pages = pci_resource_len(dev->pdev, PSB_GTT_RESOURCE) >> PAGE_SHIFT;
+ pg->gatt_pages = pci_resource_len(dev->pdev, PSB_GATT_RESOURCE) >> PAGE_SHIFT;

pci_read_config_dword(dev->pdev, PSB_BSM, &dev_priv->stolen_base);
vram_stolen_size = pg->gtt_phys_start - dev_priv->stolen_base - PAGE_SIZE;

stolen_size = vram_stolen_size;

- printk(KERN_INFO"GMMADR(region 0) start: 0x%08x (%dM).\n",
- pg->gatt_start, pg->gatt_pages/256);
- printk(KERN_INFO"GTTADR(region 3) start: 0x%08x (can map %dM RAM), and actual RAM base 0x%08x.\n",
- pg->gtt_start, gtt_pages * 4, pg->gtt_phys_start);
printk(KERN_INFO "Stolen memory information\n");
printk(KERN_INFO " base in RAM: 0x%x\n", dev_priv->stolen_base);
printk(KERN_INFO " size: %luK, calculated by (GTT RAM base) - (Stolen base), seems wrong\n",
@@ -473,8 +464,11 @@ int psb_gtt_init(struct drm_device *dev, int resume)
pg->gtt_pages = gtt_pages;
pg->stolen_size = stolen_size;
dev_priv->vram_stolen_size = vram_stolen_size;
- dev_priv->gtt_map =
- ioremap_nocache(pg->gtt_phys_start, gtt_pages << PAGE_SHIFT);
+
+ /*
+ * Map the GTT and the stolen memory area
+ */
+ dev_priv->gtt_map = ioremap_nocache(pg->gtt_phys_start, gtt_pages << PAGE_SHIFT);
if (!dev_priv->gtt_map) {
DRM_ERROR("Failure to map gtt.\n");
ret = -ENOMEM;
@@ -488,15 +482,8 @@ int psb_gtt_init(struct drm_device *dev, int resume)
goto out_err;
}

- DRM_DEBUG("gma500: vram kernel virtual address %p\n", dev_priv->vram_addr);
-
- tt_pages = (pg->gatt_pages < PSB_TT_PRIV0_PLIMIT) ?
- (pg->gatt_pages) : PSB_TT_PRIV0_PLIMIT;
-
- ttm_gtt_map = dev_priv->gtt_map + tt_pages / 2;
-
/*
- * insert vram stolen pages.
+ * Insert vram stolen pages into the GTT
*/

pfn_base = dev_priv->stolen_base >> PAGE_SHIFT;
@@ -509,26 +496,15 @@ int psb_gtt_init(struct drm_device *dev, int resume)
}

/*
- * Init rest of gtt managed by IMG.
- */
- pfn_base = page_to_pfn(dev_priv->scratch_page);
- pte = psb_gtt_mask_pte(pfn_base, 0);
- for (; i < tt_pages / 2 - 1; ++i)
- iowrite32(pte, dev_priv->gtt_map + i);
-
- /*
- * Init rest of gtt managed by TTM.
+ * Init rest of GTT to the scratch page to avoid accidents or scribbles
*/

pfn_base = page_to_pfn(dev_priv->scratch_page);
pte = psb_gtt_mask_pte(pfn_base, 0);
- PSB_DEBUG_INIT("Initializing the rest of a total "
- "of %d gtt pages.\n", pg->gatt_pages);
+ for (; i < gtt_pages; ++i)
+ iowrite32(pte, dev_priv->gtt_map + i);

- for (; i < pg->gatt_pages - tt_pages / 2; ++i)
- iowrite32(pte, ttm_gtt_map + i);
(void) ioread32(dev_priv->gtt_map + i - 1);
-
return 0;

out_err:


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