The current implementation of psb_gtt_init() also does resume
handling. Move the resume code into its own helper.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
---
drivers/gpu/drm/gma500/gtt.c | 122 ++++++++++++++++++++++++++-----
drivers/gpu/drm/gma500/gtt.h | 2 +-
drivers/gpu/drm/gma500/psb_drv.c | 2 +-
3 files changed, 104 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c
index acd50ee26b03..43ad3ec38c80 100644
--- a/drivers/gpu/drm/gma500/gtt.c
+++ b/drivers/gpu/drm/gma500/gtt.c
@@ -209,7 +209,7 @@ static void psb_gtt_populate_resources(struct drm_psb_private *pdev)
drm_dbg(dev, "Restored %u of %u gtt ranges (%u KB)", restored, total, (size / 1024));
}
-int psb_gtt_init(struct drm_device *dev, int resume)
+int psb_gtt_init(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
struct pci_dev *pdev = to_pci_dev(dev->dev);
@@ -218,10 +218,8 @@ int psb_gtt_init(struct drm_device *dev, int resume)
struct psb_gtt *pg;
int ret = 0;
- if (!resume) {
- mutex_init(&dev_priv->gtt_mutex);
- mutex_init(&dev_priv->mmap_mutex);
- }
+ mutex_init(&dev_priv->gtt_mutex);
+ mutex_init(&dev_priv->mmap_mutex);
pg = &dev_priv->gtt;
@@ -290,13 +288,6 @@ int psb_gtt_init(struct drm_device *dev, int resume)
dev_dbg(dev->dev, "Stolen memory base 0x%x, size %luK\n",
dev_priv->stolen_base, vram_stolen_size / 1024);
- if (resume && (gtt_pages != pg->gtt_pages) &&
- (stolen_size != pg->stolen_size)) {
- dev_err(dev->dev, "GTT resume error.\n");
- ret = -EINVAL;
- goto out_err;
- }
-
pg->gtt_pages = gtt_pages;
pg->stolen_size = stolen_size;
dev_priv->vram_stolen_size = vram_stolen_size;
@@ -304,19 +295,14 @@ int psb_gtt_init(struct drm_device *dev, int resume)
/*
* Map the GTT and the stolen memory area
*/
- if (!resume)
- dev_priv->gtt_map = ioremap(pg->gtt_phys_start,
- gtt_pages << PAGE_SHIFT);
+ dev_priv->gtt_map = ioremap(pg->gtt_phys_start, gtt_pages << PAGE_SHIFT);
if (!dev_priv->gtt_map) {
dev_err(dev->dev, "Failure to map gtt.\n");
ret = -ENOMEM;
goto out_err;
}
- if (!resume)
- dev_priv->vram_addr = ioremap_wc(dev_priv->stolen_base,
- stolen_size);
-
+ dev_priv->vram_addr = ioremap_wc(dev_priv->stolen_base, stolen_size);
if (!dev_priv->vram_addr) {
dev_err(dev->dev, "Failure to map stolen base.\n");
ret = -ENOMEM;
@@ -333,11 +319,107 @@ int psb_gtt_init(struct drm_device *dev, int resume)
return ret;
}
+static int psb_gtt_resume(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
+ unsigned int gtt_pages;
+ unsigned long stolen_size, vram_stolen_size;
+ struct psb_gtt *pg;
+ int ret = 0;
+
+ pg = &dev_priv->gtt;
+
+ /* Enable the GTT */
+ pci_read_config_word(pdev, PSB_GMCH_CTRL, &dev_priv->gmch_ctrl);
+ pci_write_config_word(pdev, PSB_GMCH_CTRL,
+ dev_priv->gmch_ctrl | _PSB_GMCH_ENABLED);
+
+ dev_priv->pge_ctl = PSB_RVDC32(PSB_PGETBL_CTL);
+ PSB_WVDC32(dev_priv->pge_ctl | _PSB_PGETBL_ENABLED, PSB_PGETBL_CTL);
+ (void) PSB_RVDC32(PSB_PGETBL_CTL);
+
+ /* The root resource we allocate address space from */
+ dev_priv->gtt_initialized = 1;
+
+ pg->gtt_phys_start = dev_priv->pge_ctl & PAGE_MASK;
+
+ /*
+ * The video mmu has a hw bug when accessing 0x0D0000000.
+ * Make gatt start at 0x0e000,0000. This doesn't actually
+ * matter for us but may do if the video acceleration ever
+ * gets opened up.
+ */
+ pg->mmu_gatt_start = 0xE0000000;
+
+ pg->gtt_start = pci_resource_start(pdev, PSB_GTT_RESOURCE);
+ gtt_pages = pci_resource_len(pdev, PSB_GTT_RESOURCE) >> PAGE_SHIFT;
+ /* CDV doesn't report this. In which case the system has 64 gtt pages */
+ if (pg->gtt_start == 0 || gtt_pages == 0) {
+ dev_dbg(dev->dev, "GTT PCI BAR not initialized.\n");
+ gtt_pages = 64;
+ pg->gtt_start = dev_priv->pge_ctl;
+ }
+
+ pg->gatt_start = pci_resource_start(pdev, PSB_GATT_RESOURCE);
+ pg->gatt_pages = pci_resource_len(pdev, PSB_GATT_RESOURCE) >> PAGE_SHIFT;
+ dev_priv->gtt_mem = &pdev->resource[PSB_GATT_RESOURCE];
+
+ if (pg->gatt_pages == 0 || pg->gatt_start == 0) {
+ static struct resource fudge; /* Preferably peppermint */
+ /*
+ * This can occur on CDV systems. Fudge it in this case. We
+ * really don't care what imaginary space is being allocated
+ * at this point.
+ */
+ dev_dbg(dev->dev, "GATT PCI BAR not initialized.\n");
+ pg->gatt_start = 0x40000000;
+ pg->gatt_pages = (128 * 1024 * 1024) >> PAGE_SHIFT;
+ /*
+ * This is a little confusing but in fact the GTT is providing
+ * a view from the GPU into memory and not vice versa. As such
+ * this is really allocating space that is not the same as the
+ * CPU address space on CDV.
+ */
+ fudge.start = 0x40000000;
+ fudge.end = 0x40000000 + 128 * 1024 * 1024 - 1;
+ fudge.name = "fudge";
+ fudge.flags = IORESOURCE_MEM;
+ dev_priv->gtt_mem = &fudge;
+ }
+
+ pci_read_config_dword(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;
+
+ dev_dbg(dev->dev, "Stolen memory base 0x%x, size %luK\n",
+ dev_priv->stolen_base, vram_stolen_size / 1024);
+
+ if ((gtt_pages != pg->gtt_pages) && (stolen_size != pg->stolen_size)) {
+ dev_err(dev->dev, "GTT resume error.\n");
+ ret = -EINVAL;
+ goto out_err;
+ }
+
+ pg->gtt_pages = gtt_pages;
+ pg->stolen_size = stolen_size;
+ dev_priv->vram_stolen_size = vram_stolen_size;
+
+ psb_gtt_clear(dev_priv);
+ psb_gtt_populate_stolen(dev_priv);
+
+ return 0;
+
+out_err:
+ psb_gtt_takedown(dev);
+ return ret;
+}
+
int psb_gtt_restore(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
- psb_gtt_init(dev, 1);
+ psb_gtt_resume(dev);
psb_gtt_populate_resources(dev_priv);
diff --git a/drivers/gpu/drm/gma500/gtt.h b/drivers/gpu/drm/gma500/gtt.h
index 31500533ac45..cb270ea40794 100644
--- a/drivers/gpu/drm/gma500/gtt.h
+++ b/drivers/gpu/drm/gma500/gtt.h
@@ -25,7 +25,7 @@ struct psb_gtt {
};
/* Exported functions */
-extern int psb_gtt_init(struct drm_device *dev, int resume);
+int psb_gtt_init(struct drm_device *dev);
extern void psb_gtt_takedown(struct drm_device *dev);
extern int psb_gtt_restore(struct drm_device *dev);
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index 7227a8e44d23..2891a3dc8d2e 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -324,7 +324,7 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags)
set_pages_uc(dev_priv->scratch_page, 1);
- ret = psb_gtt_init(dev, 0);
+ ret = psb_gtt_init(dev);
if (ret)
goto out_err;
--
2.35.1
