To implement a PPGTT for drm/i915 that fully aliases the GTT, we also
need to properly alias the scratch page.
Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Reviewed-by: Ben Widawsky <ben at bwidawsk.net>
---
drivers/char/agp/intel-gtt.c | 9 ++++-----
include/drm/intel-gtt.h | 2 ++
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index c92424c..0a305ac 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -76,7 +76,6 @@ static struct _intel_private {
struct resource ifp_resource;
int resource_valid;
struct page *scratch_page;
- dma_addr_t scratch_page_dma;
} intel_private;
#define INTEL_GTT_GEN intel_private.driver->gen
@@ -306,9 +305,9 @@ static int intel_gtt_setup_scratch_page(void)
if (pci_dma_mapping_error(intel_private.pcidev, dma_addr))
return -EINVAL;
- intel_private.scratch_page_dma = dma_addr;
+ intel_private.base.scratch_page_dma = dma_addr;
} else
- intel_private.scratch_page_dma = page_to_phys(page);
+ intel_private.base.scratch_page_dma = page_to_phys(page);
intel_private.scratch_page = page;
@@ -631,7 +630,7 @@ static unsigned int intel_gtt_mappable_entries(void)
static void intel_gtt_teardown_scratch_page(void)
{
set_pages_wb(intel_private.scratch_page, 1);
- pci_unmap_page(intel_private.pcidev, intel_private.scratch_page_dma,
+ pci_unmap_page(intel_private.pcidev, intel_private.base.scratch_page_dma,
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
put_page(intel_private.scratch_page);
__free_page(intel_private.scratch_page);
@@ -975,7 +974,7 @@ void intel_gtt_clear_range(unsigned int first_entry, unsigned int num_entries)
unsigned int i;
for (i = first_entry; i < (first_entry + num_entries); i++) {
- intel_private.driver->write_entry(intel_private.scratch_page_dma,
+ intel_private.driver->write_entry(intel_private.base.scratch_page_dma,
i, 0);
}
readl(intel_private.gtt+i-1);
diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index b174620..6d4c77a 100644
--- a/include/drm/intel-gtt.h
+++ b/include/drm/intel-gtt.h
@@ -15,6 +15,8 @@ const struct intel_gtt {
unsigned int needs_dmar : 1;
/* Whether we idle the gpu before mapping/unmapping */
unsigned int do_idle_maps : 1;
+ /* Share the scratch page dma with ppgtts. */
+ dma_addr_t scratch_page_dma;
} *intel_gtt_get(void);
void intel_gtt_chipset_flush(void);
--
1.7.7.3
