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Commit b90ca986 authored by Christian König's avatar Christian König
Browse files

drm/radeon: make cp init on cayman more robust 



It's not critical, but the current code isn't
100% correct.

Signed-off-by: default avatarChristian König <deathsimple@vodafone.de>
Reviewed-by: default avatarJerome Glisse <jglisse@redhat.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent d40fd3a3

drivers/gpu/drm/radeon/ni.c

+56 −77
Original line number Diff line number Diff line
@@ -987,10 +987,33 @@ static void cayman_cp_fini(struct radeon_device *rdev) 


int cayman_cp_resume(struct radeon_device *rdev)

{

	static const int ridx[] = {

		RADEON_RING_TYPE_GFX_INDEX,

		CAYMAN_RING_TYPE_CP1_INDEX,

		CAYMAN_RING_TYPE_CP2_INDEX

	};

	static const unsigned cp_rb_cntl[] = {

		CP_RB0_CNTL,

		CP_RB1_CNTL,

		CP_RB2_CNTL,

	};

	static const unsigned cp_rb_rptr_addr[] = {

		CP_RB0_RPTR_ADDR,

		CP_RB1_RPTR_ADDR,

		CP_RB2_RPTR_ADDR

	};

	static const unsigned cp_rb_rptr_addr_hi[] = {

		CP_RB0_RPTR_ADDR_HI,

		CP_RB1_RPTR_ADDR_HI,

		CP_RB2_RPTR_ADDR_HI

	};

	static const unsigned cp_rb_base[] = {

		CP_RB0_BASE,

		CP_RB1_BASE,

		CP_RB2_BASE

	};

	struct radeon_ring *ring;

	u32 tmp;

	u32 rb_bufsz;

	int r;

	int i, r;



	/* Reset cp; if cp is reset, then PA, SH, VGT also need to be reset */

	WREG32(GRBM_SOFT_RESET, (SOFT_RESET_CP |
@@ -1012,91 +1035,47 @@ int cayman_cp_resume(struct radeon_device *rdev) 


	WREG32(CP_DEBUG, (1 << 27));



	/* ring 0 - compute and gfx */

	/* Set ring buffer size */

	ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX];

	rb_bufsz = drm_order(ring->ring_size / 8);

	tmp = (drm_order(RADEON_GPU_PAGE_SIZE/8) << 8) | rb_bufsz;

#ifdef __BIG_ENDIAN

	tmp |= BUF_SWAP_32BIT;

#endif

	WREG32(CP_RB0_CNTL, tmp);



	/* Initialize the ring buffer's read and write pointers */

	WREG32(CP_RB0_CNTL, tmp | RB_RPTR_WR_ENA);

	ring->wptr = 0;

	WREG32(CP_RB0_WPTR, ring->wptr);



	/* set the wb address wether it's enabled or not */

	WREG32(CP_RB0_RPTR_ADDR, (rdev->wb.gpu_addr + RADEON_WB_CP_RPTR_OFFSET) & 0xFFFFFFFC);

	WREG32(CP_RB0_RPTR_ADDR_HI, upper_32_bits(rdev->wb.gpu_addr + RADEON_WB_CP_RPTR_OFFSET) & 0xFF);

	WREG32(SCRATCH_ADDR, ((rdev->wb.gpu_addr + RADEON_WB_SCRATCH_OFFSET) >> 8) & 0xFFFFFFFF);



	if (rdev->wb.enabled)

	WREG32(SCRATCH_UMSK, 0xff);

	else {

		tmp |= RB_NO_UPDATE;

		WREG32(SCRATCH_UMSK, 0);

	}



	mdelay(1);

	WREG32(CP_RB0_CNTL, tmp);



	WREG32(CP_RB0_BASE, ring->gpu_addr >> 8);



	ring->rptr = RREG32(CP_RB0_RPTR);

	for (i = 0; i < 3; ++i) {

		uint32_t rb_cntl;

		uint64_t addr;



	/* ring1  - compute only */

		/* Set ring buffer size */

	ring = &rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX];

	rb_bufsz = drm_order(ring->ring_size / 8);

	tmp = (drm_order(RADEON_GPU_PAGE_SIZE/8) << 8) | rb_bufsz;

		ring = &rdev->ring[ridx[i]];

		rb_cntl = drm_order(ring->ring_size / 8);

		rb_cntl |= drm_order(RADEON_GPU_PAGE_SIZE/8) << 8;

#ifdef __BIG_ENDIAN

	tmp |= BUF_SWAP_32BIT;

		rb_cntl |= BUF_SWAP_32BIT;

#endif

	WREG32(CP_RB1_CNTL, tmp);



	/* Initialize the ring buffer's read and write pointers */

	WREG32(CP_RB1_CNTL, tmp | RB_RPTR_WR_ENA);

	ring->wptr = 0;

	WREG32(CP_RB1_WPTR, ring->wptr);

		WREG32(cp_rb_cntl[i], rb_cntl);



		/* set the wb address wether it's enabled or not */

	WREG32(CP_RB1_RPTR_ADDR, (rdev->wb.gpu_addr + RADEON_WB_CP1_RPTR_OFFSET) & 0xFFFFFFFC);

	WREG32(CP_RB1_RPTR_ADDR_HI, upper_32_bits(rdev->wb.gpu_addr + RADEON_WB_CP1_RPTR_OFFSET) & 0xFF);



	mdelay(1);

	WREG32(CP_RB1_CNTL, tmp);



	WREG32(CP_RB1_BASE, ring->gpu_addr >> 8);



	ring->rptr = RREG32(CP_RB1_RPTR);

		addr = rdev->wb.gpu_addr + RADEON_WB_CP_RPTR_OFFSET;

		WREG32(cp_rb_rptr_addr[i], addr & 0xFFFFFFFC);

		WREG32(cp_rb_rptr_addr_hi[i], upper_32_bits(addr) & 0xFF);

	}



	/* ring2 - compute only */

	/* Set ring buffer size */

	ring = &rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX];

	rb_bufsz = drm_order(ring->ring_size / 8);

	tmp = (drm_order(RADEON_GPU_PAGE_SIZE/8) << 8) | rb_bufsz;

#ifdef __BIG_ENDIAN

	tmp |= BUF_SWAP_32BIT;

#endif

	WREG32(CP_RB2_CNTL, tmp);

	/* set the rb base addr, this causes an internal reset of ALL rings */

	for (i = 0; i < 3; ++i) {

		ring = &rdev->ring[ridx[i]];

		WREG32(cp_rb_base[i], ring->gpu_addr >> 8);

	}



	for (i = 0; i < 3; ++i) {

		/* Initialize the ring buffer's read and write pointers */

	WREG32(CP_RB2_CNTL, tmp | RB_RPTR_WR_ENA);

	ring->wptr = 0;

	WREG32(CP_RB2_WPTR, ring->wptr);

		ring = &rdev->ring[ridx[i]];

		WREG32_P(cp_rb_cntl[i], RB_RPTR_WR_ENA, ~RB_RPTR_WR_ENA);



	/* set the wb address wether it's enabled or not */

	WREG32(CP_RB2_RPTR_ADDR, (rdev->wb.gpu_addr + RADEON_WB_CP2_RPTR_OFFSET) & 0xFFFFFFFC);

	WREG32(CP_RB2_RPTR_ADDR_HI, upper_32_bits(rdev->wb.gpu_addr + RADEON_WB_CP2_RPTR_OFFSET) & 0xFF);

		ring->rptr = ring->wptr = 0;

		WREG32(ring->rptr_reg, ring->rptr);

		WREG32(ring->wptr_reg, ring->wptr);



		mdelay(1);

	WREG32(CP_RB2_CNTL, tmp);



	WREG32(CP_RB2_BASE, ring->gpu_addr >> 8);



	ring->rptr = RREG32(CP_RB2_RPTR);

		WREG32_P(cp_rb_cntl[i], 0, ~RB_RPTR_WR_ENA);

	}



	/* start the rings */

	cayman_cp_start(rdev);