Commit 054e01d6 authored by Christian König's avatar Christian König Committed by Alex Deucher
Browse files

drm/radeon: save/restore the PD addr on suspend/resume 



This fixes a problem with GPU resets and TLB flushes on SI/CIK.

Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent a284e9d1

drivers/gpu/drm/radeon/cik.c

+14 −6
Original line number Diff line number Diff line
@@ -5749,20 +5749,17 @@ static int cik_pcie_gart_enable(struct radeon_device *rdev) 
	WREG32(0x15D8, 0);

	WREG32(0x15DC, 0);



	/* empty context1-15 */

	/* FIXME start with 4G, once using 2 level pt switch to full

	 * vm size space

	 */

	/* restore context1-15 */

	/* set vm size, must be a multiple of 4 */

	WREG32(VM_CONTEXT1_PAGE_TABLE_START_ADDR, 0);

	WREG32(VM_CONTEXT1_PAGE_TABLE_END_ADDR, rdev->vm_manager.max_pfn);

	for (i = 1; i < 16; i++) {

		if (i < 8)

			WREG32(VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (i << 2),

			       rdev->gart.table_addr >> 12);

			       rdev->vm_manager.saved_table_addr[i]);

		else

			WREG32(VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((i - 8) << 2),

			       rdev->gart.table_addr >> 12);

			       rdev->vm_manager.saved_table_addr[i]);

	}



	/* enable context1-15 */
@@ -5827,6 +5824,17 @@ static int cik_pcie_gart_enable(struct radeon_device *rdev) 
 */

static void cik_pcie_gart_disable(struct radeon_device *rdev)

{

	unsigned i;



	for (i = 1; i < 16; ++i) {

		uint32_t reg;

		if (i < 8)

			reg = VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (i << 2);

		else

			reg = VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((i - 8) << 2);

		rdev->vm_manager.saved_table_addr[i] = RREG32(reg);

	}



	/* Disable all tables */

	WREG32(VM_CONTEXT0_CNTL, 0);

	WREG32(VM_CONTEXT1_CNTL, 0);

drivers/gpu/drm/radeon/ni.c

+8 −1
Original line number Diff line number Diff line
@@ -1271,7 +1271,7 @@ static int cayman_pcie_gart_enable(struct radeon_device *rdev) 
		WREG32(VM_CONTEXT0_PAGE_TABLE_START_ADDR + (i << 2), 0);

		WREG32(VM_CONTEXT0_PAGE_TABLE_END_ADDR + (i << 2), rdev->vm_manager.max_pfn);

		WREG32(VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (i << 2),

			rdev->gart.table_addr >> 12);

		       rdev->vm_manager.saved_table_addr[i]);

	}



	/* enable context1-7 */
@@ -1303,6 +1303,13 @@ static int cayman_pcie_gart_enable(struct radeon_device *rdev) 


static void cayman_pcie_gart_disable(struct radeon_device *rdev)

{

	unsigned i;



	for (i = 1; i < 8; ++i) {

		rdev->vm_manager.saved_table_addr[i] = RREG32(

			VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (i << 2));

	}



	/* Disable all tables */

	WREG32(VM_CONTEXT0_CNTL, 0);

	WREG32(VM_CONTEXT1_CNTL, 0);

drivers/gpu/drm/radeon/radeon.h

+2 −0
Original line number Diff line number Diff line
@@ -915,6 +915,8 @@ struct radeon_vm_manager { 
	u64				vram_base_offset;

	/* is vm enabled? */

	bool				enabled;

	/* for hw to save the PD addr on suspend/resume */

	uint32_t			saved_table_addr[RADEON_NUM_VM];

};



/*

drivers/gpu/drm/radeon/si.c

+13 −2
Original line number Diff line number Diff line
@@ -4290,10 +4290,10 @@ static int si_pcie_gart_enable(struct radeon_device *rdev) 
	for (i = 1; i < 16; i++) {

		if (i < 8)

			WREG32(VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (i << 2),

			       rdev->gart.table_addr >> 12);

			       rdev->vm_manager.saved_table_addr[i]);

		else

			WREG32(VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((i - 8) << 2),

			       rdev->gart.table_addr >> 12);

			       rdev->vm_manager.saved_table_addr[i]);

	}



	/* enable context1-15 */
@@ -4325,6 +4325,17 @@ static int si_pcie_gart_enable(struct radeon_device *rdev) 


static void si_pcie_gart_disable(struct radeon_device *rdev)

{

	unsigned i;



	for (i = 1; i < 16; ++i) {

		uint32_t reg;

		if (i < 8)

			reg = VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (i << 2);

		else

			reg = VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((i - 8) << 2);

		rdev->vm_manager.saved_table_addr[i] = RREG32(reg);

	}



	/* Disable all tables */

	WREG32(VM_CONTEXT0_CNTL, 0);

	WREG32(VM_CONTEXT1_CNTL, 0);