agp/intel-gtt: export the scratch page dma address
To implement a PPGTT for drm/i915 that fully aliases the GTT, we also
need to properly alias the scratch page.
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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 @@
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 @@
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 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 @@
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 @@
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);