From df07d6999e4e502ff474eeafe11ea0055f4cd68d Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 13 Jul 2011 06:28:17 +0000 Subject: drm/radeon: Writeback endian fixes The writeback ring pointer and IH ring pointer are read using le32_to_cpu so we do not want the chip to byteswap them on big-endian. We still want to byteswap the ring itself and the IBs, so we don't touch that but we remove setting of the byteswap bits in CP_RB_RPTR_ADDR and IH_CNTL. In general, for things like that where we control all the accessors easily, we are better off doing the swap in SW rather than HW. Paradoxally, it does keep the code closer to x86 and avoid using poorly tested HW features. I also changed the use of RADEON_ to R600_ in a couple of cases to be more consistent with the surrounding code. Signed-off-by: Benjamin Herrenschmidt Reviewed-by: Michel Dänzer Reviewed-by: Alex Deucher Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/evergreen.c | 3 --- drivers/gpu/drm/radeon/r600.c | 7 ------- drivers/gpu/drm/radeon/r600_cp.c | 23 +++++++++-------------- 3 files changed, 9 insertions(+), 24 deletions(-) diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 55d04ee88c24..37dd6449f46f 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1382,9 +1382,6 @@ int evergreen_cp_resume(struct radeon_device *rdev) /* set the wb address wether it's enabled or not */ WREG32(CP_RB_RPTR_ADDR, -#ifdef __BIG_ENDIAN - RB_RPTR_SWAP(2) | -#endif ((rdev->wb.gpu_addr + RADEON_WB_CP_RPTR_OFFSET) & 0xFFFFFFFC)); WREG32(CP_RB_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); diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index 9fefce704f96..1741af86943c 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -2213,9 +2213,6 @@ int r600_cp_resume(struct radeon_device *rdev) /* set the wb address whether it's enabled or not */ WREG32(CP_RB_RPTR_ADDR, -#ifdef __BIG_ENDIAN - RB_RPTR_SWAP(2) | -#endif ((rdev->wb.gpu_addr + RADEON_WB_CP_RPTR_OFFSET) & 0xFFFFFFFC)); WREG32(CP_RB_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); @@ -2995,10 +2992,6 @@ int r600_irq_init(struct radeon_device *rdev) /* RPTR_REARM only works if msi's are enabled */ if (rdev->msi_enabled) ih_cntl |= RPTR_REARM; - -#ifdef __BIG_ENDIAN - ih_cntl |= IH_MC_SWAP(IH_MC_SWAP_32BIT); -#endif WREG32(IH_CNTL, ih_cntl); /* force the active interrupt state to all disabled */ diff --git a/drivers/gpu/drm/radeon/r600_cp.c b/drivers/gpu/drm/radeon/r600_cp.c index c3ab959bdc7c..45fd592f9606 100644 --- a/drivers/gpu/drm/radeon/r600_cp.c +++ b/drivers/gpu/drm/radeon/r600_cp.c @@ -1802,8 +1802,8 @@ static void r600_cp_init_ring_buffer(struct drm_device *dev, /* Set ring buffer size */ #ifdef __BIG_ENDIAN RADEON_WRITE(R600_CP_RB_CNTL, - RADEON_BUF_SWAP_32BIT | - RADEON_RB_NO_UPDATE | + R600_BUF_SWAP_32BIT | + R600_RB_NO_UPDATE | (dev_priv->ring.rptr_update_l2qw << 8) | dev_priv->ring.size_l2qw); #else @@ -1820,15 +1820,15 @@ static void r600_cp_init_ring_buffer(struct drm_device *dev, #ifdef __BIG_ENDIAN RADEON_WRITE(R600_CP_RB_CNTL, - RADEON_BUF_SWAP_32BIT | - RADEON_RB_NO_UPDATE | - RADEON_RB_RPTR_WR_ENA | + R600_BUF_SWAP_32BIT | + R600_RB_NO_UPDATE | + R600_RB_RPTR_WR_ENA | (dev_priv->ring.rptr_update_l2qw << 8) | dev_priv->ring.size_l2qw); #else RADEON_WRITE(R600_CP_RB_CNTL, - RADEON_RB_NO_UPDATE | - RADEON_RB_RPTR_WR_ENA | + R600_RB_NO_UPDATE | + R600_RB_RPTR_WR_ENA | (dev_priv->ring.rptr_update_l2qw << 8) | dev_priv->ring.size_l2qw); #endif @@ -1851,13 +1851,8 @@ static void r600_cp_init_ring_buffer(struct drm_device *dev, - ((unsigned long) dev->sg->virtual) + dev_priv->gart_vm_start; } - RADEON_WRITE(R600_CP_RB_RPTR_ADDR, -#ifdef __BIG_ENDIAN - (2 << 0) | -#endif - (rptr_addr & 0xfffffffc)); - RADEON_WRITE(R600_CP_RB_RPTR_ADDR_HI, - upper_32_bits(rptr_addr)); + RADEON_WRITE(R600_CP_RB_RPTR_ADDR, (rptr_addr & 0xfffffffc)); + RADEON_WRITE(R600_CP_RB_RPTR_ADDR_HI, upper_32_bits(rptr_addr)); #ifdef __BIG_ENDIAN RADEON_WRITE(R600_CP_RB_CNTL, -- cgit v1.2.3