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Diffstat (limited to 'src/intel/vulkan/anv_private.h')
| -rw-r--r-- | src/intel/vulkan/anv_private.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/intel/vulkan/anv_private.h b/src/intel/vulkan/anv_private.h index 55bdf365014..5e384940181 100644 --- a/src/intel/vulkan/anv_private.h +++ b/src/intel/vulkan/anv_private.h @@ -104,6 +104,25 @@ struct gen_l3_config; #define MAX_IMAGES 8 #define MAX_PUSH_DESCRIPTORS 32 /* Minimum requirement */ +/* The kernel relocation API has a limitation of a 32-bit delta value + * applied to the address before it is written which, in spite of it being + * unsigned, is treated as signed . Because of the way that this maps to + * the Vulkan API, we cannot handle an offset into a buffer that does not + * fit into a signed 32 bits. The only mechanism we have for dealing with + * this at the moment is to limit all VkDeviceMemory objects to a maximum + * of 2GB each. The Vulkan spec allows us to do this: + * + * "Some platforms may have a limit on the maximum size of a single + * allocation. For example, certain systems may fail to create + * allocations with a size greater than or equal to 4GB. Such a limit is + * implementation-dependent, and if such a failure occurs then the error + * VK_ERROR_OUT_OF_DEVICE_MEMORY should be returned." + * + * We don't use vk_error here because it's not an error so much as an + * indication to the application that the allocation is too large. + */ +#define MAX_MEMORY_ALLOCATION_SIZE (1ull << 31) + #define ANV_SVGS_VB_INDEX MAX_VBS #define ANV_DRAWID_VB_INDEX (MAX_VBS + 1) |