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authorKenneth Graunke <kenneth@whitecape.org>2014-01-13 14:14:36 -0800
committerKenneth Graunke <kenneth@whitecape.org>2014-01-20 10:58:15 -0800
commitedf17dbdaa525fe3a9abbbfafa768c556cfd7af2 (patch)
treeadd03522798900453e62a21d6a61f85197f3ef59
parent02f93c21e6e1c3dad9d99349989daa84a8c0b5fb (diff)
intel: Create a new drm_intel_bo offset64 field.
The existing 'offset' field is unfortunately typed as 'unsigned long', which is unfortunately only 4 bytes with a 32-bit userspace. Traditionally, the hardware has only supported 32-bit virtual addresses, so even though the kernel uses a __u64, the value would always fit. However, Broadwell supports 48-bit addressing. So with a 64-bit kernel, the card virtual address may be too large to fit in the 'offset' field. Ideally, we would change the type of 'offset' to be a uint64_t---but this would break the libdrm ABI. Instead, we create a new 'offset64' field to hold the full 64-bit value from the kernel, and store the 32-bit truncation in the existing 'offset' field, for compatibility. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Eric Anholt <eric@anholt.net> Reviewed-by: Ben Widawsky <ben@bwidawsk.net> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
-rw-r--r--intel/intel_bufmgr.h12
-rw-r--r--intel/intel_bufmgr_gem.c16
2 files changed, 19 insertions, 9 deletions
diff --git a/intel/intel_bufmgr.h b/intel/intel_bufmgr.h
index 2eb9742b..9383c722 100644
--- a/intel/intel_bufmgr.h
+++ b/intel/intel_bufmgr.h
@@ -61,9 +61,8 @@ struct _drm_intel_bo {
unsigned long align;
/**
- * Last seen card virtual address (offset from the beginning of the
- * aperture) for the object. This should be used to fill relocation
- * entries when calling drm_intel_bo_emit_reloc()
+ * Deprecated field containing (possibly the low 32-bits of) the last
+ * seen virtual card address. Use offset64 instead.
*/
unsigned long offset;
@@ -84,6 +83,13 @@ struct _drm_intel_bo {
* MM-specific handle for accessing object
*/
int handle;
+
+ /**
+ * Last seen card virtual address (offset from the beginning of the
+ * aperture) for the object. This should be used to fill relocation
+ * entries when calling drm_intel_bo_emit_reloc()
+ */
+ uint64_t offset64;
};
enum aub_dump_bmp_format {
diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c
index e20e2c42..007a6d86 100644
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -391,7 +391,7 @@ drm_intel_gem_dump_validation_list(drm_intel_bufmgr_gem *bufmgr_gem)
(unsigned long long)bo_gem->relocs[j].offset,
target_gem->gem_handle,
target_gem->name,
- target_bo->offset,
+ target_bo->offset64,
bo_gem->relocs[j].delta);
}
}
@@ -911,6 +911,7 @@ drm_intel_bo_gem_create_from_name(drm_intel_bufmgr *bufmgr,
bo_gem->bo.size = open_arg.size;
bo_gem->bo.offset = 0;
+ bo_gem->bo.offset64 = 0;
bo_gem->bo.virtual = NULL;
bo_gem->bo.bufmgr = bufmgr;
bo_gem->name = name;
@@ -1706,7 +1707,7 @@ do_bo_emit_reloc(drm_intel_bo *bo, uint32_t offset,
target_bo_gem->gem_handle;
bo_gem->relocs[bo_gem->reloc_count].read_domains = read_domains;
bo_gem->relocs[bo_gem->reloc_count].write_domain = write_domain;
- bo_gem->relocs[bo_gem->reloc_count].presumed_offset = target_bo->offset;
+ bo_gem->relocs[bo_gem->reloc_count].presumed_offset = target_bo->offset64;
bo_gem->reloc_target_info[bo_gem->reloc_count].bo = target_bo;
if (target_bo != bo)
@@ -1857,11 +1858,12 @@ drm_intel_update_buffer_offsets(drm_intel_bufmgr_gem *bufmgr_gem)
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
/* Update the buffer offset */
- if (bufmgr_gem->exec_objects[i].offset != bo->offset) {
+ if (bufmgr_gem->exec_objects[i].offset != bo->offset64) {
DBG("BO %d (%s) migrated: 0x%08lx -> 0x%08llx\n",
- bo_gem->gem_handle, bo_gem->name, bo->offset,
+ bo_gem->gem_handle, bo_gem->name, bo->offset64,
(unsigned long long)bufmgr_gem->exec_objects[i].
offset);
+ bo->offset64 = bufmgr_gem->exec_objects[i].offset;
bo->offset = bufmgr_gem->exec_objects[i].offset;
}
}
@@ -1877,10 +1879,11 @@ drm_intel_update_buffer_offsets2 (drm_intel_bufmgr_gem *bufmgr_gem)
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *)bo;
/* Update the buffer offset */
- if (bufmgr_gem->exec2_objects[i].offset != bo->offset) {
+ if (bufmgr_gem->exec2_objects[i].offset != bo->offset64) {
DBG("BO %d (%s) migrated: 0x%08lx -> 0x%08llx\n",
- bo_gem->gem_handle, bo_gem->name, bo->offset,
+ bo_gem->gem_handle, bo_gem->name, bo->offset64,
(unsigned long long)bufmgr_gem->exec2_objects[i].offset);
+ bo->offset64 = bufmgr_gem->exec2_objects[i].offset;
bo->offset = bufmgr_gem->exec2_objects[i].offset;
}
}
@@ -2388,6 +2391,7 @@ drm_intel_gem_bo_pin(drm_intel_bo *bo, uint32_t alignment)
if (ret != 0)
return -errno;
+ bo->offset64 = pin.offset;
bo->offset = pin.offset;
return 0;
}