[ 080/122] drm/radeon: allow MIP_ADDRESS=0 for MSAA textures on Evergreen

Greg Kroah-Hartman
2012-10-11T00:34:21Z

From: Marek Olšák <maraeo@gmail.com>

commit 61051afd3540da71c1ac32f17ed663595a0f7ecb upstream.

MIP_ADDRESS should point to the resolved FMASK for an MSAA texture.
Setting MIP_ADDRESS to 0 means the FMASK pointer is invalid (the GPU
won't read the memory then).

The userspace has to set MIP_ADDRESS to 0 and *not* emit any relocation
for it.

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/radeon/evergreen_cs.c | 59 +++++++++++++++++++++++++++++-----
drivers/gpu/drm/radeon/radeon_drv.c | 3 +
2 files changed, 54 insertions(+), 8 deletions(-)

--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -846,6 +846,16 @@ static int evergreen_cs_track_validate_t
return -EINVAL;
}

+ if (!mipmap) {
+ if (llevel) {
+ dev_warn(p->dev, "%s:%i got NULL MIP_ADDRESS relocation\n",
+ __func__, __LINE__);
+ return -EINVAL;
+ } else {
+ return 0; /* everything's ok */
+ }
+ }
+
/* check mipmap size */
for (i = 1; i <= llevel; i++) {
unsigned w, h, d;
@@ -1081,6 +1091,27 @@ static int evergreen_cs_packet_next_relo
}

/**
+ * evergreen_cs_packet_next_is_pkt3_nop() - test if the next packet is NOP
+ * @p: structure holding the parser context.
+ *
+ * Check if the next packet is a relocation packet3.
+ **/
+static bool evergreen_cs_packet_next_is_pkt3_nop(struct radeon_cs_parser *p)
+{
+ struct radeon_cs_packet p3reloc;
+ int r;
+
+ r = evergreen_cs_packet_parse(p, &p3reloc, p->idx);
+ if (r) {
+ return false;
+ }
+ if (p3reloc.type != PACKET_TYPE3 || p3reloc.opcode != PACKET3_NOP) {
+ return false;
+ }
+ return true;
+}
+
+/**
* evergreen_cs_packet_next_vline() - parse userspace VLINE packet
* @parser: parser structure holding parsing context.
*
@@ -2330,7 +2361,7 @@ static int evergreen_packet3_check(struc
for (i = 0; i < (pkt->count / 8); i++) {
struct radeon_bo *texture, *mipmap;
u32 toffset, moffset;
- u32 size, offset;
+ u32 size, offset, mip_address, tex_dim;

switch (G__SQ_CONSTANT_TYPE(radeon_get_ib_value(p, idx+1+(i*8)+7))) {
case SQ_TEX_VTX_VALID_TEXTURE:
@@ -2359,14 +2390,28 @@ static int evergreen_packet3_check(struc
}
texture = reloc->robj;
toffset = (u32)((reloc->lobj.gpu_offset >> 8) & 0xffffffff);
+
/* tex mip base */
- r = evergreen_cs_packet_next_reloc(p, &reloc);
- if (r) {
- DRM_ERROR("bad SET_RESOURCE (tex)\n");
- return -EINVAL;
+ tex_dim = ib[idx+1+(i*8)+0] & 0x7;
+ mip_address = ib[idx+1+(i*8)+3];
+
+ if ((tex_dim == SQ_TEX_DIM_2D_MSAA || tex_dim == SQ_TEX_DIM_2D_ARRAY_MSAA) &&
+ !mip_address &&
+ !evergreen_cs_packet_next_is_pkt3_nop(p)) {
+ /* MIP_ADDRESS should point to FMASK for an MSAA texture.
+ * It should be 0 if FMASK is disabled. */
+ moffset = 0;
+ mipmap = NULL;
+ } else {
+ r = evergreen_cs_packet_next_reloc(p, &reloc);
+ if (r) {
+ DRM_ERROR("bad SET_RESOURCE (tex)\n");
+ return -EINVAL;
+ }
+ moffset = (u32)((reloc->lobj.gpu_offset >> 8) & 0xffffffff);
+ mipmap = reloc->robj;
}
- moffset = (u32)((reloc->lobj.gpu_offset >> 8) & 0xffffffff);
- mipmap = reloc->robj;
+
r = evergreen_cs_track_validate_texture(p, texture, mipmap, idx+1+(i*8));
if (r)
return r;
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -65,9 +65,10 @@
* 2.21.0 - r600-r700: FMASK and CMASK
* 2.22.0 - r600 only: RESOLVE_BOX allowed
* 2.23.0 - allow STRMOUT_BASE_UPDATE on RS780 and RS880
+ * 2.24.0 - eg only: allow MIP_ADDRESS=0 for MSAA textures
*/
#define KMS_DRIVER_MAJOR 2
-#define KMS_DRIVER_MINOR 23
+#define KMS_DRIVER_MINOR 24
#define KMS_DRIVER_PATCHLEVEL 0
int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags);
int radeon_driver_unload_kms(struct drm_device *dev);