From 72a9987edcedb89db988079a03c9b9c65b6ec9ac Mon Sep 17 00:00:00 2001 From: Michel Dänzer Date: Thu, 31 Jul 2014 18:43:49 +0900 Subject: drm/radeon: Always flush the HDP cache before submitting a CS to the GPU MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This ensures the GPU sees all previous CPU writes to VRAM, which makes it safe: * For userspace to stream data from CPU to GPU via VRAM instead of GTT * For IBs to be stored in VRAM instead of GTT * For ring buffers to be stored in VRAM instead of GTT, if the HPD flush is performed via MMIO Signed-off-by: Michel Dänzer Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/radeon_asic.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/radeon/radeon_asic.c') diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c index 5781fde5c1ce..c49a01f92b4d 100644 --- a/drivers/gpu/drm/radeon/radeon_asic.c +++ b/drivers/gpu/drm/radeon/radeon_asic.c @@ -185,6 +185,7 @@ static struct radeon_asic_ring r100_gfx_ring = { .get_rptr = &r100_gfx_get_rptr, .get_wptr = &r100_gfx_get_wptr, .set_wptr = &r100_gfx_set_wptr, + .hdp_flush = &r100_ring_hdp_flush, }; static struct radeon_asic r100_asic = { @@ -331,6 +332,7 @@ static struct radeon_asic_ring r300_gfx_ring = { .get_rptr = &r100_gfx_get_rptr, .get_wptr = &r100_gfx_get_wptr, .set_wptr = &r100_gfx_set_wptr, + .hdp_flush = &r100_ring_hdp_flush, }; static struct radeon_asic r300_asic = { @@ -1987,7 +1989,7 @@ static struct radeon_asic ci_asic = { .resume = &cik_resume, .asic_reset = &cik_asic_reset, .vga_set_state = &r600_vga_set_state, - .mmio_hdp_flush = NULL, + .mmio_hdp_flush = &r600_mmio_hdp_flush, .gui_idle = &r600_gui_idle, .mc_wait_for_idle = &evergreen_mc_wait_for_idle, .get_xclk = &cik_get_xclk, @@ -2091,7 +2093,7 @@ static struct radeon_asic kv_asic = { .resume = &cik_resume, .asic_reset = &cik_asic_reset, .vga_set_state = &r600_vga_set_state, - .mmio_hdp_flush = NULL, + .mmio_hdp_flush = &r600_mmio_hdp_flush, .gui_idle = &r600_gui_idle, .mc_wait_for_idle = &evergreen_mc_wait_for_idle, .get_xclk = &cik_get_xclk, -- cgit v1.2.3