drm/imagination: Implement MIPS firmware processor and MMU support

Add support for the MIPS firmware processor, used in the Series AXE GPU.
The MIPS firmware processor uses a separate MMU to the rest of the GPU, so
this patch adds support for that as well.

Changes since v8:
- Corrected license identifiers

Changes since v6:
- Fix integer overflow in VM map error path

Changes since v5:
- Use alloc_page() when allocating MIPS pagetable

Changes since v3:
- Get regs resource (removed from GPU resources commit)

Signed-off-by: Sarah Walker <sarah.walker@imgtec.com>
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Link: https://lore.kernel.org/r/a114f7b3e97cb07460c7f2842901716a9207b0c4.1700668843.git.donald.robson@imgtec.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/drm/imagination/pvr_device.c b/drivers/gpu/drm/imagination/pvr_device.c
index 1be14cdbdace..2d6db4715f85 100644
--- a/drivers/gpu/drm/imagination/pvr_device.c
+++ b/drivers/gpu/drm/imagination/pvr_device.c
@@ -50,16 +50,19 @@ pvr_device_reg_init(struct pvr_device *pvr_dev)
 {
 	struct drm_device *drm_dev = from_pvr_device(pvr_dev);
 	struct platform_device *plat_dev = to_platform_device(drm_dev->dev);
+	struct resource *regs_resource;
 	void __iomem *regs;
 
+	pvr_dev->regs_resource = NULL;
 	pvr_dev->regs = NULL;
 
-	regs = devm_platform_ioremap_resource(plat_dev, 0);
+	regs = devm_platform_get_and_ioremap_resource(plat_dev, 0, &regs_resource);
 	if (IS_ERR(regs))
 		return dev_err_probe(drm_dev->dev, PTR_ERR(regs),
 				     "failed to ioremap gpu registers\n");
 
 	pvr_dev->regs = regs;
+	pvr_dev->regs_resource = regs_resource;
 
 	return 0;
 }