diff options
| author | Zbigniew Kempczyński <zbigniew.kempczynski@intel.com> | 2021-09-22 20:05:59 +0200 |
|---|---|---|
| committer | Zbigniew Kempczyński <zbigniew.kempczynski@intel.com> | 2021-10-15 05:54:36 +0200 |
| commit | 2360173cce25da5fba5a379d16416803d6228d5d (patch) | |
| tree | 06db61adb2f1c621058a40467e7f7a026a4457a2 /lib/i915 | |
| parent | 04b156109f1c5128d5ace67420ee2e35e8a24e1d (diff) | |
lib/gem_submission: Add kernel exec object alignment capability
v2: rename to gem_allows_obj_alignment() (Ashutosh)
With newer gens passing non-zero alignment will be forbidden.
Add check which detects kernel supports it or not.
Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Diffstat (limited to 'lib/i915')
| -rw-r--r-- | lib/i915/gem_submission.c | 32 | ||||
| -rw-r--r-- | lib/i915/gem_submission.h | 1 |
2 files changed, 33 insertions, 0 deletions
diff --git a/lib/i915/gem_submission.c b/lib/i915/gem_submission.c index f1af4f97..2627b802 100644 --- a/lib/i915/gem_submission.c +++ b/lib/i915/gem_submission.c @@ -472,3 +472,35 @@ bool gem_has_relocations(int i915) return has_relocs; } + +/** + * gem_allows_obj_alignment + * @fd: opened i915 drm file descriptor + * + * Check does i915 driver allows setting object alignment in exec object to + * handle in kernel and adjust object offset accordingly. + * + * Returns: true if kernel supports setting offset to be aligned, otherwise + * false. + */ +bool gem_allows_obj_alignment(int fd) +{ + struct drm_i915_gem_exec_object2 obj = { + .handle = gem_create(fd, 4096), + }; + struct drm_i915_gem_execbuffer2 execbuf = { + .buffers_ptr = to_user_pointer(&obj), + .buffer_count = 1, + }; + bool ret; + const uint32_t bbe = MI_BATCH_BUFFER_END; + + gem_write(fd, obj.handle, 0, &bbe, sizeof(bbe)); + gem_execbuf(fd, &execbuf); + + obj.alignment = 0x2000; + ret = __gem_execbuf(fd, &execbuf) == 0; + gem_close(fd, obj.handle); + + return ret; +} diff --git a/lib/i915/gem_submission.h b/lib/i915/gem_submission.h index 9b3e2a4e..38dd24a9 100644 --- a/lib/i915/gem_submission.h +++ b/lib/i915/gem_submission.h @@ -55,5 +55,6 @@ unsigned int gem_submission_measure(int i915, const intel_ctx_cfg_t *cfg, void gem_test_all_engines(int fd); bool gem_has_relocations(int fd); +bool gem_allows_obj_alignment(int fd); #endif /* GEM_SUBMISSION_H */ |