From 84ef4c12ee7b7a080364ad9168ffcf5fa6df4ecf Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 22 Apr 2016 10:06:23 +1000 Subject: [PATCH] drm/radeon: add cayman VM support for append packet. This adds support for SET_APPEND_CNT packet3 to the VM paths. Signed-off-by: Dave Airlie Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/evergreen_cs.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c index 18ddd752b64b..0d3f744de35a 100644 --- a/drivers/gpu/drm/radeon/evergreen_cs.c +++ b/drivers/gpu/drm/radeon/evergreen_cs.c @@ -3483,6 +3483,27 @@ static int evergreen_vm_packet3_check(struct radeon_device *rdev, } } break; + case PACKET3_SET_APPEND_CNT: { + uint32_t areg; + uint32_t allowed_reg_base; + + if (pkt->count != 2) { + DRM_ERROR("bad SET_APPEND_CNT (invalid count)\n"); + return -EINVAL; + } + + allowed_reg_base = GDS_APPEND_COUNT_0; + allowed_reg_base -= PACKET3_SET_CONTEXT_REG_START; + allowed_reg_base >>= 2; + + areg = idx_value >> 16; + if (areg < allowed_reg_base || areg > (allowed_reg_base + 11)) { + DRM_ERROR("forbidden register for append cnt 0x%08x at %d\n", + areg, idx); + return -EINVAL; + } + break; + } default: return -EINVAL; } -- 2.30.2