[Mesa-dev] [PATCH mesa v2] i965/gen8+: bo in state base address must be in 32-bit address range

[Michel Thierry]

Gen8+ supports 48-bit virtual addresses, but some objects must always be
allocated inside the 32-bit address range.

In specific, any resource used with flat/heapless (0x00000000-0xfffff000)
General State Heap or Intruction State Heap must be in a 32-bit range
(GSH / ISH), because the General State Offset and Instruction State Offset
are limited to 32-bits.

Use drm_intel_bo_emit_reloc_48bit when the 4GB limit is not necessary, and
the bo can be in the full address space.

This commit introduces a dependency of libdrm 2.4.63, which introduces the
drm_intel_bo_emit_reloc_48bit function.

v2: s/48baddress/48b_address/,
    Only use in OUT_RELOC64 cases, OUT_RELOC implies a 32-bit address offset
    is needed (Ben)

Cc: Ben Widawsky <ben at bwidawsk.net>
Cc: mesa-dev at lists.freedesktop.org
Signed-off-by: Michel Thierry <michel.thierry at intel.com>
---
 configure.ac                                  |  2 +-
 src/mesa/drivers/dri/i965/gen8_misc_state.c   | 23 +++++++++++++++--------
 src/mesa/drivers/dri/i965/intel_batchbuffer.c |  6 +++---
 3 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/configure.ac b/configure.ac
index af61aa2..c92ca44 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,7 +68,7 @@ AC_SUBST([OSMESA_VERSION])
 dnl Versions for external dependencies
 LIBDRM_REQUIRED=2.4.38
 LIBDRM_RADEON_REQUIRED=2.4.56
-LIBDRM_INTEL_REQUIRED=2.4.60
+LIBDRM_INTEL_REQUIRED=2.4.63
 LIBDRM_NVVIEUX_REQUIRED=2.4.33
 LIBDRM_NOUVEAU_REQUIRED="2.4.33 libdrm >= 2.4.41"
 LIBDRM_FREEDRENO_REQUIRED=2.4.57
diff --git a/src/mesa/drivers/dri/i965/gen8_misc_state.c b/src/mesa/drivers/dri/i965/gen8_misc_state.c
index b20038e..5c8924d 100644
--- a/src/mesa/drivers/dri/i965/gen8_misc_state.c
+++ b/src/mesa/drivers/dri/i965/gen8_misc_state.c
@@ -28,6 +28,11 @@
 
 /**
  * Define the base addresses which some state is referenced from.
+ *
+ * Use OUT_RELOC instead of OUT_RELOC64, because the General State
+ * Offset and Instruction State Offset are limited to 32-bits by
+ * hardware [and add OUT_BATCH(0) after each OUT_RELOC to complete
+ * the number of dwords needed for STATE_BASE_ADDRESS].
  */
 void gen8_upload_state_base_address(struct brw_context *brw)
 {
@@ -41,19 +46,21 @@ void gen8_upload_state_base_address(struct brw_context *brw)
    OUT_BATCH(0);
    OUT_BATCH(mocs_wb << 16);
    /* Surface state base address: */
-   OUT_RELOC64(brw->batch.bo, I915_GEM_DOMAIN_SAMPLER, 0,
-               mocs_wb << 4 | 1);
+   OUT_RELOC(brw->batch.bo, I915_GEM_DOMAIN_SAMPLER, 0,
+             mocs_wb << 4 | 1);
+   OUT_BATCH(0);
    /* Dynamic state base address: */
-   OUT_RELOC64(brw->batch.bo,
-               I915_GEM_DOMAIN_RENDER | I915_GEM_DOMAIN_INSTRUCTION, 0,
-               mocs_wb << 4 | 1);
+   OUT_RELOC(brw->batch.bo,
+             I915_GEM_DOMAIN_RENDER | I915_GEM_DOMAIN_INSTRUCTION, 0,
+             mocs_wb << 4 | 1);
+   OUT_BATCH(0);
    /* Indirect object base address: MEDIA_OBJECT data */
    OUT_BATCH(mocs_wb << 4 | 1);
    OUT_BATCH(0);
    /* Instruction base address: shader kernels (incl. SIP) */
-   OUT_RELOC64(brw->cache.bo, I915_GEM_DOMAIN_INSTRUCTION, 0,
-               mocs_wb << 4 | 1);
-
+   OUT_RELOC(brw->cache.bo, I915_GEM_DOMAIN_INSTRUCTION, 0,
+             mocs_wb << 4 | 1);
+   OUT_BATCH(0);
    /* General state buffer size */
    OUT_BATCH(0xfffff001);
    /* Dynamic state buffer size */
diff --git a/src/mesa/drivers/dri/i965/intel_batchbuffer.c b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
index 54081a1..220a35b 100644
--- a/src/mesa/drivers/dri/i965/intel_batchbuffer.c
+++ b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
@@ -411,9 +411,9 @@ intel_batchbuffer_emit_reloc64(struct brw_context *brw,
                                uint32_t read_domains, uint32_t write_domain,
 			       uint32_t delta)
 {
-   int ret = drm_intel_bo_emit_reloc(brw->batch.bo, 4*brw->batch.used,
-                                     buffer, delta,
-                                     read_domains, write_domain);
+   int ret = drm_intel_bo_emit_reloc_48bit(brw->batch.bo, 4*brw->batch.used,
+                                           buffer, delta,
+                                           read_domains, write_domain);
    assert(ret == 0);
    (void) ret;
 
-- 
2.4.5