The process for merging uAPI is to have UMD side ready and reviewed and merged before merging. Revert for now until that is ready. This reverts commit d54576a074a29d4901d0a693cd84e1a89057f694.
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| @@ -3346,33 +3346,8 @@ struct drm_i915_memory_region_info { · 3345 unmodified lines | |||
| 3346 | /** @region: The class:instance pair encoding */ | 3346 | /** @region: The class:instance pair encoding */ |
| 3347 | struct drm_i915_gem_memory_class_instance region; | 3347 | struct drm_i915_gem_memory_class_instance region; |
| 3348 | 3348 | ||
| 3349 | union { | 3349 | /** @rsvd0: MBZ */ |
| 3350 | /** @rsvd0: MBZ */ | 3350 | __u32 rsvd0; |
| 3351 | __u32 rsvd0; | ||
| 3352 | /** | ||
| 3353 | * @gtt_alignment: | ||
| 3354 | * | ||
| 3355 | * The minimum required GTT alignment for this type of memory. | ||
| 3356 | * When allocating a GTT address it must be aligned to this | ||
| 3357 | * value or larger. On some platforms the kernel might opt to | ||
| 3358 | * using 64K pages for I915_MEMORY_CLASS_DEVICE, where 64K GTT | ||
| 3359 | * pages can then be used if we also use 64K GTT alignment. | ||
| 3360 | * | ||
| 3361 | * NOTE: If this is zero then this must be an older | ||
| 3362 | * kernel which lacks support for this field. | ||
| 3363 | * | ||
| 3364 | * Side note: For larger objects (especially for | ||
| 3365 | * I915_MEMORY_CLASS_DEVICE), like 2M+ in size, userspace should | ||
| 3366 | * consider potentially bumping the GTT alignment to say 2M, | ||
| 3367 | * which could potentially increase the likelihood of the kernel | ||
| 3368 | * being able to utilise 2M GTT pages underneath, if the layout | ||
| 3369 | * of the physical pages allows it. On some configurations we | ||
| 3370 | * can then also use a more efficient page-table layout, if we | ||
| 3371 | * can't use the more desirable 2M GTT page, so long as we know | ||
| 3372 | * that the entire page-table will be used by this object. | ||
| 3373 | */ | ||
| 3374 | __u32 gtt_alignment; | ||
| 3375 | }; | ||
| 3376 | 3351 | ||
| 3377 | /** | 3352 | /** |
| 3378 | * @probed_size: Memory probed by the driver | 3353 | * @probed_size: Memory probed by the driver |