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Filename :
i915_drm.h
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/* * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #ifndef _I915_DRM_H_ #define _I915_DRM_H_ #include "drm.h" #if defined(__cplusplus) extern "C" { #endif /* Please note that modifications to all structs defined here are * subject to backwards-compatibility constraints. */ /** * DOC: uevents generated by i915 on it's device node * * I915_L3_PARITY_UEVENT - Generated when the driver receives a parity mismatch * event from the gpu l3 cache. Additional information supplied is ROW, * BANK, SUBBANK, SLICE of the affected cacheline. Userspace should keep * track of these events and if a specific cache-line seems to have a * persistent error remap it with the l3 remapping tool supplied in * intel-gpu-tools. The value supplied with the event is always 1. * * I915_ERROR_UEVENT - Generated upon error detection, currently only via * hangcheck. The error detection event is a good indicator of when things * began to go badly. The value supplied with the event is a 1 upon error * detection, and a 0 upon reset completion, signifying no more error * exists. NOTE: Disabling hangcheck or reset via module parameter will * cause the related events to not be seen. * * I915_RESET_UEVENT - Event is generated just before an attempt to reset the * GPU. The value supplied with the event is always 1. NOTE: Disable * reset via module parameter will cause this event to not be seen. */ #define I915_L3_PARITY_UEVENT "L3_PARITY_ERROR" #define I915_ERROR_UEVENT "ERROR" #define I915_RESET_UEVENT "RESET" /** * struct i915_user_extension - Base class for defining a chain of extensions * * Many interfaces need to grow over time. In most cases we can simply * extend the struct and have userspace pass in more data. Another option, * as demonstrated by Vulkan's approach to providing extensions for forward * and backward compatibility, is to use a list of optional structs to * provide those extra details. * * The key advantage to using an extension chain is that it allows us to * redefine the interface more easily than an ever growing struct of * increasing complexity, and for large parts of that interface to be * entirely optional. The downside is more pointer chasing; chasing across * the boundary with pointers encapsulated inside u64. * * Example chaining: * * .. code-block:: C * * struct i915_user_extension ext3 { * .next_extension = 0, // end * .name = ..., * }; * struct i915_user_extension ext2 { * .next_extension = (uintptr_t)&ext3, * .name = ..., * }; * struct i915_user_extension ext1 { * .next_extension = (uintptr_t)&ext2, * .name = ..., * }; * * Typically the struct i915_user_extension would be embedded in some uAPI * struct, and in this case we would feed it the head of the chain(i.e ext1), * which would then apply all of the above extensions. * */ struct i915_user_extension { /** * @next_extension: * * Pointer to the next struct i915_user_extension, or zero if the end. */ __u64 next_extension; /** * @name: Name of the extension. * * Note that the name here is just some integer. * * Also note that the name space for this is not global for the whole * driver, but rather its scope/meaning is limited to the specific piece * of uAPI which has embedded the struct i915_user_extension. */ __u32 name; /** * @flags: MBZ * * All undefined bits must be zero. */ __u32 flags; /** * @rsvd: MBZ * * Reserved for future use; must be zero. */ __u32 rsvd[4]; }; /* * MOCS indexes used for GPU surfaces, defining the cacheability of the * surface data and the coherency for this data wrt. CPU vs. GPU accesses. */ enum i915_mocs_table_index { /* * Not cached anywhere, coherency between CPU and GPU accesses is * guaranteed. */ I915_MOCS_UNCACHED, /* * Cacheability and coherency controlled by the kernel automatically * based on the DRM_I915_GEM_SET_CACHING IOCTL setting and the current * usage of the surface (used for display scanout or not). */ I915_MOCS_PTE, /* * Cached in all GPU caches available on the platform. * Coherency between CPU and GPU accesses to the surface is not * guaranteed without extra synchronization. */ I915_MOCS_CACHED, }; /** * enum drm_i915_gem_engine_class - uapi engine type enumeration * * Different engines serve different roles, and there may be more than one * engine serving each role. This enum provides a classification of the role * of the engine, which may be used when requesting operations to be performed * on a certain subset of engines, or for providing information about that * group. */ enum drm_i915_gem_engine_class { /** * @I915_ENGINE_CLASS_RENDER: * * Render engines support instructions used for 3D, Compute (GPGPU), * and programmable media workloads. These instructions fetch data and * dispatch individual work items to threads that operate in parallel. * The threads run small programs (called "kernels" or "shaders") on * the GPU's execution units (EUs). */ I915_ENGINE_CLASS_RENDER = 0, /** * @I915_ENGINE_CLASS_COPY: * * Copy engines (also referred to as "blitters") support instructions * that move blocks of data from one location in memory to another, * or that fill a specified location of memory with fixed data. * Copy engines can perform pre-defined logical or bitwise operations * on the source, destination, or pattern data. */ I915_ENGINE_CLASS_COPY = 1, /** * @I915_ENGINE_CLASS_VIDEO: * * Video engines (also referred to as "bit stream decode" (BSD) or * "vdbox") support instructions that perform fixed-function media * decode and encode. */ I915_ENGINE_CLASS_VIDEO = 2, /** * @I915_ENGINE_CLASS_VIDEO_ENHANCE: * * Video enhancement engines (also referred to as "vebox") support * instructions related to image enhancement. */ I915_ENGINE_CLASS_VIDEO_ENHANCE = 3, /** * @I915_ENGINE_CLASS_COMPUTE: * * Compute engines support a subset of the instructions available * on render engines: compute engines support Compute (GPGPU) and * programmable media workloads, but do not support the 3D pipeline. */ I915_ENGINE_CLASS_COMPUTE = 4, /* Values in this enum should be kept compact. */ /** * @I915_ENGINE_CLASS_INVALID: * * Placeholder value to represent an invalid engine class assignment. */ I915_ENGINE_CLASS_INVALID = -1 }; /** * struct i915_engine_class_instance - Engine class/instance identifier * * There may be more than one engine fulfilling any role within the system. * Each engine of a class is given a unique instance number and therefore * any engine can be specified by its class:instance tuplet. APIs that allow * access to any engine in the system will use struct i915_engine_class_instance * for this identification. */ struct i915_engine_class_instance { /** * @engine_class: * * Engine class from enum drm_i915_gem_engine_class */ __u16 engine_class; #define I915_ENGINE_CLASS_INVALID_NONE -1 #define I915_ENGINE_CLASS_INVALID_VIRTUAL -2 /** * @engine_instance: * * Engine instance. */ __u16 engine_instance; }; /** * DOC: perf_events exposed by i915 through /sys/bus/event_sources/drivers/i915 * */ enum drm_i915_pmu_engine_sample { I915_SAMPLE_BUSY = 0, I915_SAMPLE_WAIT = 1, I915_SAMPLE_SEMA = 2 }; #define I915_PMU_SAMPLE_BITS (4) #define I915_PMU_SAMPLE_MASK (0xf) #define I915_PMU_SAMPLE_INSTANCE_BITS (8) #define I915_PMU_CLASS_SHIFT \ (I915_PMU_SAMPLE_BITS + I915_PMU_SAMPLE_INSTANCE_BITS) #define __I915_PMU_ENGINE(class, instance, sample) \ ((class) << I915_PMU_CLASS_SHIFT | \ (instance) << I915_PMU_SAMPLE_BITS | \ (sample)) #define I915_PMU_ENGINE_BUSY(class, instance) \ __I915_PMU_ENGINE(class, instance, I915_SAMPLE_BUSY) #define I915_PMU_ENGINE_WAIT(class, instance) \ __I915_PMU_ENGINE(class, instance, I915_SAMPLE_WAIT) #define I915_PMU_ENGINE_SEMA(class, instance) \ __I915_PMU_ENGINE(class, instance, I915_SAMPLE_SEMA) #define __I915_PMU_OTHER(x) (__I915_PMU_ENGINE(0xff, 0xff, 0xf) + 1 + (x)) #define I915_PMU_ACTUAL_FREQUENCY __I915_PMU_OTHER(0) #define I915_PMU_REQUESTED_FREQUENCY __I915_PMU_OTHER(1) #define I915_PMU_INTERRUPTS __I915_PMU_OTHER(2) #define I915_PMU_RC6_RESIDENCY __I915_PMU_OTHER(3) #define I915_PMU_SOFTWARE_GT_AWAKE_TIME __I915_PMU_OTHER(4) #define I915_PMU_LAST /* Deprecated - do not use */ I915_PMU_RC6_RESIDENCY /* Each region is a minimum of 16k, and there are at most 255 of them. */ #define I915_NR_TEX_REGIONS 255 /* table size 2k - maximum due to use * of chars for next/prev indices */ #define I915_LOG_MIN_TEX_REGION_SIZE 14 typedef struct _drm_i915_init { enum { I915_INIT_DMA = 0x01, I915_CLEANUP_DMA = 0x02, I915_RESUME_DMA = 0x03 } func; unsigned int mmio_offset; int sarea_priv_offset; unsigned int ring_start; unsigned int ring_end; unsigned int ring_size; unsigned int front_offset; unsigned int back_offset; unsigned int depth_offset; unsigned int w; unsigned int h; unsigned int pitch; unsigned int pitch_bits; unsigned int back_pitch; unsigned int depth_pitch; unsigned int cpp; unsigned int chipset; } drm_i915_init_t; typedef struct _drm_i915_sarea { struct drm_tex_region texList[I915_NR_TEX_REGIONS + 1]; int last_upload; /* last time texture was uploaded */ int last_enqueue; /* last time a buffer was enqueued */ int last_dispatch; /* age of the most recently dispatched buffer */ int ctxOwner; /* last context to upload state */ int texAge; int pf_enabled; /* is pageflipping allowed? */ int pf_active; int pf_current_page; /* which buffer is being displayed? */ int perf_boxes; /* performance boxes to be displayed */ int width, height; /* screen size in pixels */ drm_handle_t front_handle; int front_offset; int front_size; drm_handle_t back_handle; int back_offset; int back_size; drm_handle_t depth_handle; int depth_offset; int depth_size; drm_handle_t tex_handle; int tex_offset; int tex_size; int log_tex_granularity; int pitch; int rotation; /* 0, 90, 180 or 270 */ int rotated_offset; int rotated_size; int rotated_pitch; int virtualX, virtualY; unsigned int front_tiled; unsigned int back_tiled; unsigned int depth_tiled; unsigned int rotated_tiled; unsigned int rotated2_tiled; int pipeA_x; int pipeA_y; int pipeA_w; int pipeA_h; int pipeB_x; int pipeB_y; int pipeB_w; int pipeB_h; /* fill out some space for old userspace triple buffer */ drm_handle_t unused_handle; __u32 unused1, unused2, unused3; /* buffer object handles for static buffers. May change * over the lifetime of the client. */ __u32 front_bo_handle; __u32 back_bo_handle; __u32 unused_bo_handle; __u32 depth_bo_handle; } drm_i915_sarea_t; /* due to userspace building against these headers we need some compat here */ #define planeA_x pipeA_x #define planeA_y pipeA_y #define planeA_w pipeA_w #define planeA_h pipeA_h #define planeB_x pipeB_x #define planeB_y pipeB_y #define planeB_w pipeB_w #define planeB_h pipeB_h /* Flags for perf_boxes */ #define I915_BOX_RING_EMPTY 0x1 #define I915_BOX_FLIP 0x2 #define I915_BOX_WAIT 0x4 #define I915_BOX_TEXTURE_LOAD 0x8 #define I915_BOX_LOST_CONTEXT 0x10 /* * i915 specific ioctls. * * The device specific ioctl range is [DRM_COMMAND_BASE, DRM_COMMAND_END) ie * [0x40, 0xa0) (a0 is excluded). The numbers below are defined as offset * against DRM_COMMAND_BASE and should be between [0x0, 0x60). */ #define DRM_I915_INIT 0x00 #define DRM_I915_FLUSH 0x01 #define DRM_I915_FLIP 0x02 #define DRM_I915_BATCHBUFFER 0x03 #define DRM_I915_IRQ_EMIT 0x04 #define DRM_I915_IRQ_WAIT 0x05 #define DRM_I915_GETPARAM 0x06 #define DRM_I915_SETPARAM 0x07 #define DRM_I915_ALLOC 0x08 #define DRM_I915_FREE 0x09 #define DRM_I915_INIT_HEAP 0x0a #define DRM_I915_CMDBUFFER 0x0b #define DRM_I915_DESTROY_HEAP 0x0c #define DRM_I915_SET_VBLANK_PIPE 0x0d #define DRM_I915_GET_VBLANK_PIPE 0x0e #define DRM_I915_VBLANK_SWAP 0x0f #define DRM_I915_HWS_ADDR 0x11 #define DRM_I915_GEM_INIT 0x13 #define DRM_I915_GEM_EXECBUFFER 0x14 #define DRM_I915_GEM_PIN 0x15 #define DRM_I915_GEM_UNPIN 0x16 #define DRM_I915_GEM_BUSY 0x17 #define DRM_I915_GEM_THROTTLE 0x18 #define DRM_I915_GEM_ENTERVT 0x19 #define DRM_I915_GEM_LEAVEVT 0x1a #define DRM_I915_GEM_CREATE 0x1b #define DRM_I915_GEM_PREAD 0x1c #define DRM_I915_GEM_PWRITE 0x1d #define DRM_I915_GEM_MMAP 0x1e #define DRM_I915_GEM_SET_DOMAIN 0x1f #define DRM_I915_GEM_SW_FINISH 0x20 #define DRM_I915_GEM_SET_TILING 0x21 #define DRM_I915_GEM_GET_TILING 0x22 #define DRM_I915_GEM_GET_APERTURE 0x23 #define DRM_I915_GEM_MMAP_GTT 0x24 #define DRM_I915_GET_PIPE_FROM_CRTC_ID 0x25 #define DRM_I915_GEM_MADVISE 0x26 #define DRM_I915_OVERLAY_PUT_IMAGE 0x27 #define DRM_I915_OVERLAY_ATTRS 0x28 #define DRM_I915_GEM_EXECBUFFER2 0x29 #define DRM_I915_GEM_EXECBUFFER2_WR DRM_I915_GEM_EXECBUFFER2 #define DRM_I915_GET_SPRITE_COLORKEY 0x2a #define DRM_I915_SET_SPRITE_COLORKEY 0x2b #define DRM_I915_GEM_WAIT 0x2c #define DRM_I915_GEM_CONTEXT_CREATE 0x2d #define DRM_I915_GEM_CONTEXT_DESTROY 0x2e #define DRM_I915_GEM_SET_CACHING 0x2f #define DRM_I915_GEM_GET_CACHING 0x30 #define DRM_I915_REG_READ 0x31 #define DRM_I915_GET_RESET_STATS 0x32 #define DRM_I915_GEM_USERPTR 0x33 #define DRM_I915_GEM_CONTEXT_GETPARAM 0x34 #define DRM_I915_GEM_CONTEXT_SETPARAM 0x35 #define DRM_I915_PERF_OPEN 0x36 #define DRM_I915_PERF_ADD_CONFIG 0x37 #define DRM_I915_PERF_REMOVE_CONFIG 0x38 #define DRM_I915_QUERY 0x39 #define DRM_I915_GEM_VM_CREATE 0x3a #define DRM_I915_GEM_VM_DESTROY 0x3b #define DRM_I915_GEM_CREATE_EXT 0x3c /* Must be kept compact -- no holes */ #define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t) #define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH) #define DRM_IOCTL_I915_FLIP DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLIP) #define DRM_IOCTL_I915_BATCHBUFFER DRM_IOW( DRM_COMMAND_BASE + DRM_I915_BATCHBUFFER, drm_i915_batchbuffer_t) #define DRM_IOCTL_I915_IRQ_EMIT DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_IRQ_EMIT, drm_i915_irq_emit_t) #define DRM_IOCTL_I915_IRQ_WAIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_IRQ_WAIT, drm_i915_irq_wait_t) #define DRM_IOCTL_I915_GETPARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GETPARAM, drm_i915_getparam_t) #define DRM_IOCTL_I915_SETPARAM DRM_IOW( DRM_COMMAND_BASE + DRM_I915_SETPARAM, drm_i915_setparam_t) #define DRM_IOCTL_I915_ALLOC DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_ALLOC, drm_i915_mem_alloc_t) #define DRM_IOCTL_I915_FREE DRM_IOW( DRM_COMMAND_BASE + DRM_I915_FREE, drm_i915_mem_free_t) #define DRM_IOCTL_I915_INIT_HEAP DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT_HEAP, drm_i915_mem_init_heap_t) #define DRM_IOCTL_I915_CMDBUFFER DRM_IOW( DRM_COMMAND_BASE + DRM_I915_CMDBUFFER, drm_i915_cmdbuffer_t) #define DRM_IOCTL_I915_DESTROY_HEAP DRM_IOW( DRM_COMMAND_BASE + DRM_I915_DESTROY_HEAP, drm_i915_mem_destroy_heap_t) #define DRM_IOCTL_I915_SET_VBLANK_PIPE DRM_IOW( DRM_COMMAND_BASE + DRM_I915_SET_VBLANK_PIPE, drm_i915_vblank_pipe_t) #define DRM_IOCTL_I915_GET_VBLANK_PIPE DRM_IOR( DRM_COMMAND_BASE + DRM_I915_GET_VBLANK_PIPE, drm_i915_vblank_pipe_t) #define DRM_IOCTL_I915_VBLANK_SWAP DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_VBLANK_SWAP, drm_i915_vblank_swap_t) #define DRM_IOCTL_I915_HWS_ADDR DRM_IOW(DRM_COMMAND_BASE + DRM_I915_HWS_ADDR, struct drm_i915_gem_init) #define DRM_IOCTL_I915_GEM_INIT DRM_IOW(DRM_COMMAND_BASE + DRM_I915_GEM_INIT, struct drm_i915_gem_init) #define DRM_IOCTL_I915_GEM_EXECBUFFER DRM_IOW(DRM_COMMAND_BASE + DRM_I915_GEM_EXECBUFFER, struct drm_i915_gem_execbuffer) #define DRM_IOCTL_I915_GEM_EXECBUFFER2 DRM_IOW(DRM_COMMAND_BASE + DRM_I915_GEM_EXECBUFFER2, struct drm_i915_gem_execbuffer2) #define DRM_IOCTL_I915_GEM_EXECBUFFER2_WR DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_EXECBUFFER2_WR, struct drm_i915_gem_execbuffer2) #define DRM_IOCTL_I915_GEM_PIN DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_PIN, struct drm_i915_gem_pin) #define DRM_IOCTL_I915_GEM_UNPIN DRM_IOW(DRM_COMMAND_BASE + DRM_I915_GEM_UNPIN, struct drm_i915_gem_unpin) #define DRM_IOCTL_I915_GEM_BUSY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_BUSY, struct drm_i915_gem_busy) #define DRM_IOCTL_I915_GEM_SET_CACHING DRM_IOW(DRM_COMMAND_BASE + DRM_I915_GEM_SET_CACHING, struct drm_i915_gem_caching) #define DRM_IOCTL_I915_GEM_GET_CACHING DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_GET_CACHING, struct drm_i915_gem_caching) #define DRM_IOCTL_I915_GEM_THROTTLE DRM_IO ( DRM_COMMAND_BASE + DRM_I915_GEM_THROTTLE) #define DRM_IOCTL_I915_GEM_ENTERVT DRM_IO(DRM_COMMAND_BASE + DRM_I915_GEM_ENTERVT) #define DRM_IOCTL_I915_GEM_LEAVEVT DRM_IO(DRM_COMMAND_BASE + DRM_I915_GEM_LEAVEVT) #define DRM_IOCTL_I915_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_CREATE, struct drm_i915_gem_create) #define DRM_IOCTL_I915_GEM_CREATE_EXT DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_CREATE_EXT, struct drm_i915_gem_create_ext) #define DRM_IOCTL_I915_GEM_PREAD DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_PREAD, struct drm_i915_gem_pread) #define DRM_IOCTL_I915_GEM_PWRITE DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_PWRITE, struct drm_i915_gem_pwrite) #define DRM_IOCTL_I915_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MMAP, struct drm_i915_gem_mmap) #define DRM_IOCTL_I915_GEM_MMAP_GTT DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MMAP_GTT, struct drm_i915_gem_mmap_gtt) #define DRM_IOCTL_I915_GEM_MMAP_OFFSET DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MMAP_GTT, struct drm_i915_gem_mmap_offset) #define DRM_IOCTL_I915_GEM_SET_DOMAIN DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_SET_DOMAIN, struct drm_i915_gem_set_domain) #define DRM_IOCTL_I915_GEM_SW_FINISH DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_SW_FINISH, struct drm_i915_gem_sw_finish) #define DRM_IOCTL_I915_GEM_SET_TILING DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_SET_TILING, struct drm_i915_gem_set_tiling) #define DRM_IOCTL_I915_GEM_GET_TILING DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_GET_TILING, struct drm_i915_gem_get_tiling) #define DRM_IOCTL_I915_GEM_GET_APERTURE DRM_IOR (DRM_COMMAND_BASE + DRM_I915_GEM_GET_APERTURE, struct drm_i915_gem_get_aperture) #define DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GET_PIPE_FROM_CRTC_ID, struct drm_i915_get_pipe_from_crtc_id) #define DRM_IOCTL_I915_GEM_MADVISE DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MADVISE, struct drm_i915_gem_madvise) #define DRM_IOCTL_I915_OVERLAY_PUT_IMAGE DRM_IOW(DRM_COMMAND_BASE + DRM_I915_OVERLAY_PUT_IMAGE, struct drm_intel_overlay_put_image) #define DRM_IOCTL_I915_OVERLAY_ATTRS DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_OVERLAY_ATTRS, struct drm_intel_overlay_attrs) #define DRM_IOCTL_I915_SET_SPRITE_COLORKEY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_SET_SPRITE_COLORKEY, struct drm_intel_sprite_colorkey) #define DRM_IOCTL_I915_GET_SPRITE_COLORKEY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GET_SPRITE_COLORKEY, struct drm_intel_sprite_colorkey) #define DRM_IOCTL_I915_GEM_WAIT DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_WAIT, struct drm_i915_gem_wait) #define DRM_IOCTL_I915_GEM_CONTEXT_CREATE DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_CREATE, struct drm_i915_gem_context_create) #define DRM_IOCTL_I915_GEM_CONTEXT_CREATE_EXT DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_CREATE, struct drm_i915_gem_context_create_ext) #define DRM_IOCTL_I915_GEM_CONTEXT_DESTROY DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_DESTROY, struct drm_i915_gem_context_destroy) #define DRM_IOCTL_I915_REG_READ DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_REG_READ, struct drm_i915_reg_read) #define DRM_IOCTL_I915_GET_RESET_STATS DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GET_RESET_STATS, struct drm_i915_reset_stats) #define DRM_IOCTL_I915_GEM_USERPTR DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_USERPTR, struct drm_i915_gem_userptr) #define DRM_IOCTL_I915_GEM_CONTEXT_GETPARAM DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_GETPARAM, struct drm_i915_gem_context_param) #define DRM_IOCTL_I915_GEM_CONTEXT_SETPARAM DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_SETPARAM, struct drm_i915_gem_context_param) #define DRM_IOCTL_I915_PERF_OPEN DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_OPEN, struct drm_i915_perf_open_param) #define DRM_IOCTL_I915_PERF_ADD_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_ADD_CONFIG, struct drm_i915_perf_oa_config) #define DRM_IOCTL_I915_PERF_REMOVE_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_REMOVE_CONFIG, __u64) #define DRM_IOCTL_I915_QUERY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_QUERY, struct drm_i915_query) #define DRM_IOCTL_I915_GEM_VM_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_VM_CREATE, struct drm_i915_gem_vm_control) #define DRM_IOCTL_I915_GEM_VM_DESTROY DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_VM_DESTROY, struct drm_i915_gem_vm_control) /* Allow drivers to submit batchbuffers directly to hardware, relying * on the security mechanisms provided by hardware. */ typedef struct drm_i915_batchbuffer { int start; /* agp offset */ int used; /* nr bytes in use */ int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */ int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */ int num_cliprects; /* mulitpass with multiple cliprects? */ struct drm_clip_rect *cliprects; /* pointer to userspace cliprects */ } drm_i915_batchbuffer_t; /* As above, but pass a pointer to userspace buffer which can be * validated by the kernel prior to sending to hardware. */ typedef struct _drm_i915_cmdbuffer { char *buf; /* pointer to userspace command buffer */ int sz; /* nr bytes in buf */ int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */ int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */ int num_cliprects; /* mulitpass with multiple cliprects? */ struct drm_clip_rect *cliprects; /* pointer to userspace cliprects */ } drm_i915_cmdbuffer_t; /* Userspace can request & wait on irq's: */ typedef struct drm_i915_irq_emit { int *irq_seq; } drm_i915_irq_emit_t; typedef struct drm_i915_irq_wait { int irq_seq; } drm_i915_irq_wait_t; /* * Different modes of per-process Graphics Translation Table, * see I915_PARAM_HAS_ALIASING_PPGTT */ #define I915_GEM_PPGTT_NONE 0 #define I915_GEM_PPGTT_ALIASING 1 #define I915_GEM_PPGTT_FULL 2 /* Ioctl to query kernel params: */ #define I915_PARAM_IRQ_ACTIVE 1 #define I915_PARAM_ALLOW_BATCHBUFFER 2 #define I915_PARAM_LAST_DISPATCH 3 #define I915_PARAM_CHIPSET_ID 4 #define I915_PARAM_HAS_GEM 5 #define I915_PARAM_NUM_FENCES_AVAIL 6 #define I915_PARAM_HAS_OVERLAY 7 #define I915_PARAM_HAS_PAGEFLIPPING 8 #define I915_PARAM_HAS_EXECBUF2 9 #define I915_PARAM_HAS_BSD 10 #define I915_PARAM_HAS_BLT 11 #define I915_PARAM_HAS_RELAXED_FENCING 12 #define I915_PARAM_HAS_COHERENT_RINGS 13 #define I915_PARAM_HAS_EXEC_CONSTANTS 14 #define I915_PARAM_HAS_RELAXED_DELTA 15 #define I915_PARAM_HAS_GEN7_SOL_RESET 16 #define I915_PARAM_HAS_LLC 17 #define I915_PARAM_HAS_ALIASING_PPGTT 18 #define I915_PARAM_HAS_WAIT_TIMEOUT 19 #define I915_PARAM_HAS_SEMAPHORES 20 #define I915_PARAM_HAS_PRIME_VMAP_FLUSH 21 #define I915_PARAM_HAS_VEBOX 22 #define I915_PARAM_HAS_SECURE_BATCHES 23 #define I915_PARAM_HAS_PINNED_BATCHES 24 #define I915_PARAM_HAS_EXEC_NO_RELOC 25 #define I915_PARAM_HAS_EXEC_HANDLE_LUT 26 #define I915_PARAM_HAS_WT 27 #define I915_PARAM_CMD_PARSER_VERSION 28 #define I915_PARAM_HAS_COHERENT_PHYS_GTT 29 #define I915_PARAM_MMAP_VERSION 30 #define I915_PARAM_HAS_BSD2 31 #define I915_PARAM_REVISION 32 #define I915_PARAM_SUBSLICE_TOTAL 33 #define I915_PARAM_EU_TOTAL 34 #define I915_PARAM_HAS_GPU_RESET 35 #define I915_PARAM_HAS_RESOURCE_STREAMER 36 #define I915_PARAM_HAS_EXEC_SOFTPIN 37 #define I915_PARAM_HAS_POOLED_EU 38 #define I915_PARAM_MIN_EU_IN_POOL 39 #define I915_PARAM_MMAP_GTT_VERSION 40 /* * Query whether DRM_I915_GEM_EXECBUFFER2 supports user defined execution * priorities and the driver will attempt to execute batches in priority order. * The param returns a capability bitmask, nonzero implies that the scheduler * is enabled, with different features present according to the mask. * * The initial priority for each batch is supplied by the context and is * controlled via I915_CONTEXT_PARAM_PRIORITY. */ #define I915_PARAM_HAS_SCHEDULER 41 #define I915_SCHEDULER_CAP_ENABLED (1ul << 0) #define I915_SCHEDULER_CAP_PRIORITY (1ul << 1) #define I915_SCHEDULER_CAP_PREEMPTION (1ul << 2) #define I915_SCHEDULER_CAP_SEMAPHORES (1ul << 3) #define I915_SCHEDULER_CAP_ENGINE_BUSY_STATS (1ul << 4) /* * Indicates the 2k user priority levels are statically mapped into 3 buckets as * follows: * * -1k to -1 Low priority * 0 Normal priority * 1 to 1k Highest priority */ #define I915_SCHEDULER_CAP_STATIC_PRIORITY_MAP (1ul << 5) /* * Query the status of HuC load. * * The query can fail in the following scenarios with the listed error codes: * -ENODEV if HuC is not present on this platform, * -EOPNOTSUPP if HuC firmware usage is disabled, * -ENOPKG if HuC firmware fetch failed, * -ENOEXEC if HuC firmware is invalid or mismatched, * -ENOMEM if i915 failed to prepare the FW objects for transfer to the uC, * -EIO if the FW transfer or the FW authentication failed. * * If the IOCTL is successful, the returned parameter will be set to one of the * following values: * * 0 if HuC firmware load is not complete, * * 1 if HuC firmware is authenticated and running. */ #define I915_PARAM_HUC_STATUS 42 /* Query whether DRM_I915_GEM_EXECBUFFER2 supports the ability to opt-out of * synchronisation with implicit fencing on individual objects. * See EXEC_OBJECT_ASYNC. */ #define I915_PARAM_HAS_EXEC_ASYNC 43 /* Query whether DRM_I915_GEM_EXECBUFFER2 supports explicit fence support - * both being able to pass in a sync_file fd to wait upon before executing, * and being able to return a new sync_file fd that is signaled when the * current request is complete. See I915_EXEC_FENCE_IN and I915_EXEC_FENCE_OUT. */ #define I915_PARAM_HAS_EXEC_FENCE 44 /* Query whether DRM_I915_GEM_EXECBUFFER2 supports the ability to capture * user specified bufffers for post-mortem debugging of GPU hangs. See * EXEC_OBJECT_CAPTURE. */ #define I915_PARAM_HAS_EXEC_CAPTURE 45 #define I915_PARAM_SLICE_MASK 46 /* Assuming it's uniform for each slice, this queries the mask of subslices * per-slice for this system. */ #define I915_PARAM_SUBSLICE_MASK 47 /* * Query whether DRM_I915_GEM_EXECBUFFER2 supports supplying the batch buffer * as the first execobject as opposed to the last. See I915_EXEC_BATCH_FIRST. */ #define I915_PARAM_HAS_EXEC_BATCH_FIRST 48 /* Query whether DRM_I915_GEM_EXECBUFFER2 supports supplying an array of * drm_i915_gem_exec_fence structures. See I915_EXEC_FENCE_ARRAY. */ #define I915_PARAM_HAS_EXEC_FENCE_ARRAY 49 /* * Query whether every context (both per-file default and user created) is * isolated (insofar as HW supports). If this parameter is not true, then * freshly created contexts may inherit values from an existing context, * rather than default HW values. If true, it also ensures (insofar as HW * supports) that all state set by this context will not leak to any other * context. * * As not every engine across every gen support contexts, the returned * value reports the support of context isolation for individual engines by * returning a bitmask of each engine class set to true if that class supports * isolation. */ #define I915_PARAM_HAS_CONTEXT_ISOLATION 50 /* Frequency of the command streamer timestamps given by the *_TIMESTAMP * registers. This used to be fixed per platform but from CNL onwards, this * might vary depending on the parts. */ #define I915_PARAM_CS_TIMESTAMP_FREQUENCY 51 /* * Once upon a time we supposed that writes through the GGTT would be * immediately in physical memory (once flushed out of the CPU path). However, * on a few different processors and chipsets, this is not necessarily the case * as the writes appear to be buffered internally. Thus a read of the backing * storage (physical memory) via a different path (with different physical tags * to the indirect write via the GGTT) will see stale values from before * the GGTT write. Inside the kernel, we can for the most part keep track of * the different read/write domains in use (e.g. set-domain), but the assumption * of coherency is baked into the ABI, hence reporting its true state in this * parameter. * * Reports true when writes via mmap_gtt are immediately visible following an * lfence to flush the WCB. * * Reports false when writes via mmap_gtt are indeterminately delayed in an in * internal buffer and are _not_ immediately visible to third parties accessing * directly via mmap_cpu/mmap_wc. Use of mmap_gtt as part of an IPC * communications channel when reporting false is strongly disadvised. */ #define I915_PARAM_MMAP_GTT_COHERENT 52 /* * Query whether DRM_I915_GEM_EXECBUFFER2 supports coordination of parallel * execution through use of explicit fence support. * See I915_EXEC_FENCE_OUT and I915_EXEC_FENCE_SUBMIT. */ #define I915_PARAM_HAS_EXEC_SUBMIT_FENCE 53 /* * Revision of the i915-perf uAPI. The value returned helps determine what * i915-perf features are available. See drm_i915_perf_property_id. */ #define I915_PARAM_PERF_REVISION 54 /* Query whether DRM_I915_GEM_EXECBUFFER2 supports supplying an array of * timeline syncobj through drm_i915_gem_execbuffer_ext_timeline_fences. See * I915_EXEC_USE_EXTENSIONS. */ #define I915_PARAM_HAS_EXEC_TIMELINE_FENCES 55 /* Query if the kernel supports the I915_USERPTR_PROBE flag. */ #define I915_PARAM_HAS_USERPTR_PROBE 56 /* * Frequency of the timestamps in OA reports. This used to be the same as the CS * timestamp frequency, but differs on some platforms. */ #define I915_PARAM_OA_TIMESTAMP_FREQUENCY 57 /* Must be kept compact -- no holes and well documented */ /** * struct drm_i915_getparam - Driver parameter query structure. */ struct drm_i915_getparam { /** @param: Driver parameter to query. */ __s32 param; /** * @value: Address of memory where queried value should be put. * * WARNING: Using pointers instead of fixed-size u64 means we need to write * compat32 code. Don't repeat this mistake. */ int *value; }; /** * typedef drm_i915_getparam_t - Driver parameter query structure. * See struct drm_i915_getparam. */ typedef struct drm_i915_getparam drm_i915_getparam_t; /* Ioctl to set kernel params: */ #define I915_SETPARAM_USE_MI_BATCHBUFFER_START 1 #define I915_SETPARAM_TEX_LRU_LOG_GRANULARITY 2 #define I915_SETPARAM_ALLOW_BATCHBUFFER 3 #define I915_SETPARAM_NUM_USED_FENCES 4 /* Must be kept compact -- no holes */ typedef struct drm_i915_setparam { int param; int value; } drm_i915_setparam_t; /* A memory manager for regions of shared memory: */ #define I915_MEM_REGION_AGP 1 typedef struct drm_i915_mem_alloc { int region; int alignment; int size; int *region_offset; /* offset from start of fb or agp */ } drm_i915_mem_alloc_t; typedef struct drm_i915_mem_free { int region; int region_offset; } drm_i915_mem_free_t; typedef struct drm_i915_mem_init_heap { int region; int size; int start; } drm_i915_mem_init_heap_t; /* Allow memory manager to be torn down and re-initialized (eg on * rotate): */ typedef struct drm_i915_mem_destroy_heap { int region; } drm_i915_mem_destroy_heap_t; /* Allow X server to configure which pipes to monitor for vblank signals */ #define DRM_I915_VBLANK_PIPE_A 1 #define DRM_I915_VBLANK_PIPE_B 2 typedef struct drm_i915_vblank_pipe { int pipe; } drm_i915_vblank_pipe_t; /* Schedule buffer swap at given vertical blank: */ typedef struct drm_i915_vblank_swap { drm_drawable_t drawable; enum drm_vblank_seq_type seqtype; unsigned int sequence; } drm_i915_vblank_swap_t; typedef struct drm_i915_hws_addr { __u64 addr; } drm_i915_hws_addr_t; struct drm_i915_gem_init { /** * Beginning offset in the GTT to be managed by the DRM memory * manager. */ __u64 gtt_start; /** * Ending offset in the GTT to be managed by the DRM memory * manager. */ __u64 gtt_end; }; struct drm_i915_gem_create { /** * Requested size for the object. * * The (page-aligned) allocated size for the object will be returned. */ __u64 size; /** * Returned handle for the object. * * Object handles are nonzero. */ __u32 handle; __u32 pad; }; struct drm_i915_gem_pread { /** Handle for the object being read. */ __u32 handle; __u32 pad; /** Offset into the object to read from */ __u64 offset; /** Length of data to read */ __u64 size; /** * Pointer to write the data into. * * This is a fixed-size type for 32/64 compatibility. */ __u64 data_ptr; }; struct drm_i915_gem_pwrite { /** Handle for the object being written to. */ __u32 handle; __u32 pad; /** Offset into the object to write to */ __u64 offset; /** Length of data to write */ __u64 size; /** * Pointer to read the data from. * * This is a fixed-size type for 32/64 compatibility. */ __u64 data_ptr; }; struct drm_i915_gem_mmap { /** Handle for the object being mapped. */ __u32 handle; __u32 pad; /** Offset in the object to map. */ __u64 offset; /** * Length of data to map. * * The value will be page-aligned. */ __u64 size; /** * Returned pointer the data was mapped at. * * This is a fixed-size type for 32/64 compatibility. */ __u64 addr_ptr; /** * Flags for extended behaviour. * * Added in version 2. */ __u64 flags; #define I915_MMAP_WC 0x1 }; struct drm_i915_gem_mmap_gtt { /** Handle for the object being mapped. */ __u32 handle; __u32 pad; /** * Fake offset to use for subsequent mmap call * * This is a fixed-size type for 32/64 compatibility. */ __u64 offset; }; /** * struct drm_i915_gem_mmap_offset - Retrieve an offset so we can mmap this buffer object. * * This struct is passed as argument to the `DRM_IOCTL_I915_GEM_MMAP_OFFSET` ioctl, * and is used to retrieve the fake offset to mmap an object specified by &handle. * * The legacy way of using `DRM_IOCTL_I915_GEM_MMAP` is removed on gen12+. * `DRM_IOCTL_I915_GEM_MMAP_GTT` is an older supported alias to this struct, but will behave * as setting the &extensions to 0, and &flags to `I915_MMAP_OFFSET_GTT`. */ struct drm_i915_gem_mmap_offset { /** @handle: Handle for the object being mapped. */ __u32 handle; /** @pad: Must be zero */ __u32 pad; /** * @offset: The fake offset to use for subsequent mmap call * * This is a fixed-size type for 32/64 compatibility. */ __u64 offset; /** * @flags: Flags for extended behaviour. * * It is mandatory that one of the `MMAP_OFFSET` types * should be included: * * - `I915_MMAP_OFFSET_GTT`: Use mmap with the object bound to GTT. (Write-Combined) * - `I915_MMAP_OFFSET_WC`: Use Write-Combined caching. * - `I915_MMAP_OFFSET_WB`: Use Write-Back caching. * - `I915_MMAP_OFFSET_FIXED`: Use object placement to determine caching. * * On devices with local memory `I915_MMAP_OFFSET_FIXED` is the only valid * type. On devices without local memory, this caching mode is invalid. * * As caching mode when specifying `I915_MMAP_OFFSET_FIXED`, WC or WB will * be used, depending on the object placement on creation. WB will be used * when the object can only exist in system memory, WC otherwise. */ __u64 flags; #define I915_MMAP_OFFSET_GTT 0 #define I915_MMAP_OFFSET_WC 1 #define I915_MMAP_OFFSET_WB 2 #define I915_MMAP_OFFSET_UC 3 #define I915_MMAP_OFFSET_FIXED 4 /** * @extensions: Zero-terminated chain of extensions. * * No current extensions defined; mbz. */ __u64 extensions; }; /** * struct drm_i915_gem_set_domain - Adjust the objects write or read domain, in * preparation for accessing the pages via some CPU domain. * * Specifying a new write or read domain will flush the object out of the * previous domain(if required), before then updating the objects domain * tracking with the new domain. * * Note this might involve waiting for the object first if it is still active on * the GPU. * * Supported values for @read_domains and @write_domain: * * - I915_GEM_DOMAIN_WC: Uncached write-combined domain * - I915_GEM_DOMAIN_CPU: CPU cache domain * - I915_GEM_DOMAIN_GTT: Mappable aperture domain * * All other domains are rejected. * * Note that for discrete, starting from DG1, this is no longer supported, and * is instead rejected. On such platforms the CPU domain is effectively static, * where we also only support a single &drm_i915_gem_mmap_offset cache mode, * which can't be set explicitly and instead depends on the object placements, * as per the below. * * Implicit caching rules, starting from DG1: * * - If any of the object placements (see &drm_i915_gem_create_ext_memory_regions) * contain I915_MEMORY_CLASS_DEVICE then the object will be allocated and * mapped as write-combined only. * * - Everything else is always allocated and mapped as write-back, with the * guarantee that everything is also coherent with the GPU. * * Note that this is likely to change in the future again, where we might need * more flexibility on future devices, so making this all explicit as part of a * new &drm_i915_gem_create_ext extension is probable. */ struct drm_i915_gem_set_domain { /** @handle: Handle for the object. */ __u32 handle; /** @read_domains: New read domains. */ __u32 read_domains; /** * @write_domain: New write domain. * * Note that having something in the write domain implies it's in the * read domain, and only that read domain. */ __u32 write_domain; }; struct drm_i915_gem_sw_finish { /** Handle for the object */ __u32 handle; }; struct drm_i915_gem_relocation_entry { /** * Handle of the buffer being pointed to by this relocation entry. * * It's appealing to make this be an index into the mm_validate_entry * list to refer to the buffer, but this allows the driver to create * a relocation list for state buffers and not re-write it per * exec using the buffer. */ __u32 target_handle; /** * Value to be added to the offset of the target buffer to make up * the relocation entry. */ __u32 delta; /** Offset in the buffer the relocation entry will be written into */ __u64 offset; /** * Offset value of the target buffer that the relocation entry was last * written as. * * If the buffer has the same offset as last time, we can skip syncing * and writing the relocation. This value is written back out by * the execbuffer ioctl when the relocation is written. */ __u64 presumed_offset; /** * Target memory domains read by this operation. */ __u32 read_domains; /** * Target memory domains written by this operation. * * Note that only one domain may be written by the whole * execbuffer operation, so that where there are conflicts, * the application will get -EINVAL back. */ __u32 write_domain; }; /** @{ * Intel memory domains * * Most of these just align with the various caches in * the system and are used to flush and invalidate as * objects end up cached in different domains. */ /** CPU cache */ #define I915_GEM_DOMAIN_CPU 0x00000001 /** Render cache, used by 2D and 3D drawing */ #define I915_GEM_DOMAIN_RENDER 0x00000002 /** Sampler cache, used by texture engine */ #define I915_GEM_DOMAIN_SAMPLER 0x00000004 /** Command queue, used to load batch buffers */ #define I915_GEM_DOMAIN_COMMAND 0x00000008 /** Instruction cache, used by shader programs */ #define I915_GEM_DOMAIN_INSTRUCTION 0x00000010 /** Vertex address cache */ #define I915_GEM_DOMAIN_VERTEX 0x00000020 /** GTT domain - aperture and scanout */ #define I915_GEM_DOMAIN_GTT 0x00000040 /** WC domain - uncached access */ #define I915_GEM_DOMAIN_WC 0x00000080 /** @} */ struct drm_i915_gem_exec_object { /** * User's handle for a buffer to be bound into the GTT for this * operation. */ __u32 handle; /** Number of relocations to be performed on this buffer */ __u32 relocation_count; /** * Pointer to array of struct drm_i915_gem_relocation_entry containing * the relocations to be performed in this buffer. */ __u64 relocs_ptr; /** Required alignment in graphics aperture */ __u64 alignment; /** * Returned value of the updated offset of the object, for future * presumed_offset writes. */ __u64 offset; }; /* DRM_IOCTL_I915_GEM_EXECBUFFER was removed in Linux 5.13 */ struct drm_i915_gem_execbuffer { /** * List of buffers to be validated with their relocations to be * performend on them. * * This is a pointer to an array of struct drm_i915_gem_validate_entry. * * These buffers must be listed in an order such that all relocations * a buffer is performing refer to buffers that have already appeared * in the validate list. */ __u64 buffers_ptr; __u32 buffer_count; /** Offset in the batchbuffer to start execution from. */ __u32 batch_start_offset; /** Bytes used in batchbuffer from batch_start_offset */ __u32 batch_len; __u32 DR1; __u32 DR4; __u32 num_cliprects; /** This is a struct drm_clip_rect *cliprects */ __u64 cliprects_ptr; }; struct drm_i915_gem_exec_object2 { /** * User's handle for a buffer to be bound into the GTT for this * operation. */ __u32 handle; /** Number of relocations to be performed on this buffer */ __u32 relocation_count; /** * Pointer to array of struct drm_i915_gem_relocation_entry containing * the relocations to be performed in this buffer. */ __u64 relocs_ptr; /** Required alignment in graphics aperture */ __u64 alignment; /** * When the EXEC_OBJECT_PINNED flag is specified this is populated by * the user with the GTT offset at which this object will be pinned. * * When the I915_EXEC_NO_RELOC flag is specified this must contain the * presumed_offset of the object. * * During execbuffer2 the kernel populates it with the value of the * current GTT offset of the object, for future presumed_offset writes. * * See struct drm_i915_gem_create_ext for the rules when dealing with * alignment restrictions with I915_MEMORY_CLASS_DEVICE, on devices with * minimum page sizes, like DG2. */ __u64 offset; #define EXEC_OBJECT_NEEDS_FENCE (1<<0) #define EXEC_OBJECT_NEEDS_GTT (1<<1) #define EXEC_OBJECT_WRITE (1<<2) #define EXEC_OBJECT_SUPPORTS_48B_ADDRESS (1<<3) #define EXEC_OBJECT_PINNED (1<<4) #define EXEC_OBJECT_PAD_TO_SIZE (1<<5) /* The kernel implicitly tracks GPU activity on all GEM objects, and * synchronises operations with outstanding rendering. This includes * rendering on other devices if exported via dma-buf. However, sometimes * this tracking is too coarse and the user knows better. For example, * if the object is split into non-overlapping ranges shared between different * clients or engines (i.e. suballocating objects), the implicit tracking * by kernel assumes that each operation affects the whole object rather * than an individual range, causing needless synchronisation between clients. * The kernel will also forgo any CPU cache flushes prior to rendering from * the object as the client is expected to be also handling such domain * tracking. * * The kernel maintains the implicit tracking in order to manage resources * used by the GPU - this flag only disables the synchronisation prior to * rendering with this object in this execbuf. * * Opting out of implicit synhronisation requires the user to do its own * explicit tracking to avoid rendering corruption. See, for example, * I915_PARAM_HAS_EXEC_FENCE to order execbufs and execute them asynchronously. */ #define EXEC_OBJECT_ASYNC (1<<6) /* Request that the contents of this execobject be copied into the error * state upon a GPU hang involving this batch for post-mortem debugging. * These buffers are recorded in no particular order as "user" in * /sys/class/drm/cardN/error. Query I915_PARAM_HAS_EXEC_CAPTURE to see * if the kernel supports this flag. */ #define EXEC_OBJECT_CAPTURE (1<<7) /* All remaining bits are MBZ and RESERVED FOR FUTURE USE */ #define __EXEC_OBJECT_UNKNOWN_FLAGS -(EXEC_OBJECT_CAPTURE<<1) __u64 flags; union { __u64 rsvd1; __u64 pad_to_size; }; __u64 rsvd2; }; /** * struct drm_i915_gem_exec_fence - An input or output fence for the execbuf * ioctl. * * The request will wait for input fence to signal before submission. * * The returned output fence will be signaled after the completion of the * request. */ struct drm_i915_gem_exec_fence { /** @handle: User's handle for a drm_syncobj to wait on or signal. */ __u32 handle; /** * @flags: Supported flags are: * * I915_EXEC_FENCE_WAIT: * Wait for the input fence before request submission. * * I915_EXEC_FENCE_SIGNAL: * Return request completion fence as output */ __u32 flags; #define I915_EXEC_FENCE_WAIT (1<<0) #define I915_EXEC_FENCE_SIGNAL (1<<1) #define __I915_EXEC_FENCE_UNKNOWN_FLAGS (-(I915_EXEC_FENCE_SIGNAL << 1)) }; /** * struct drm_i915_gem_execbuffer_ext_timeline_fences - Timeline fences * for execbuf ioctl. * * This structure describes an array of drm_syncobj and associated points for * timeline variants of drm_syncobj. It is invalid to append this structure to * the execbuf if I915_EXEC_FENCE_ARRAY is set. */ struct drm_i915_gem_execbuffer_ext_timeline_fences { #define DRM_I915_GEM_EXECBUFFER_EXT_TIMELINE_FENCES 0 /** @base: Extension link. See struct i915_user_extension. */ struct i915_user_extension base; /** * @fence_count: Number of elements in the @handles_ptr & @value_ptr * arrays. */ __u64 fence_count; /** * @handles_ptr: Pointer to an array of struct drm_i915_gem_exec_fence * of length @fence_count. */ __u64 handles_ptr; /** * @values_ptr: Pointer to an array of u64 values of length * @fence_count. * Values must be 0 for a binary drm_syncobj. A Value of 0 for a * timeline drm_syncobj is invalid as it turns a drm_syncobj into a * binary one. */ __u64 values_ptr; }; /** * struct drm_i915_gem_execbuffer2 - Structure for DRM_I915_GEM_EXECBUFFER2 * ioctl. */ struct drm_i915_gem_execbuffer2 { /** @buffers_ptr: Pointer to a list of gem_exec_object2 structs */ __u64 buffers_ptr; /** @buffer_count: Number of elements in @buffers_ptr array */ __u32 buffer_count; /** * @batch_start_offset: Offset in the batchbuffer to start execution * from. */ __u32 batch_start_offset; /** * @batch_len: Length in bytes of the batch buffer, starting from the * @batch_start_offset. If 0, length is assumed to be the batch buffer * object size. */ __u32 batch_len; /** @DR1: deprecated */ __u32 DR1; /** @DR4: deprecated */ __u32 DR4; /** @num_cliprects: See @cliprects_ptr */ __u32 num_cliprects; /** * @cliprects_ptr: Kernel clipping was a DRI1 misfeature. * * It is invalid to use this field if I915_EXEC_FENCE_ARRAY or * I915_EXEC_USE_EXTENSIONS flags are not set. * * If I915_EXEC_FENCE_ARRAY is set, then this is a pointer to an array * of &drm_i915_gem_exec_fence and @num_cliprects is the length of the * array. * * If I915_EXEC_USE_EXTENSIONS is set, then this is a pointer to a * single &i915_user_extension and num_cliprects is 0. */ __u64 cliprects_ptr; /** @flags: Execbuf flags */ __u64 flags; #define I915_EXEC_RING_MASK (0x3f) #define I915_EXEC_DEFAULT (0<<0) #define I915_EXEC_RENDER (1<<0) #define I915_EXEC_BSD (2<<0) #define I915_EXEC_BLT (3<<0) #define I915_EXEC_VEBOX (4<<0) /* Used for switching the constants addressing mode on gen4+ RENDER ring. * Gen6+ only supports relative addressing to dynamic state (default) and * absolute addressing. * * These flags are ignored for the BSD and BLT rings. */ #define I915_EXEC_CONSTANTS_MASK (3<<6) #define I915_EXEC_CONSTANTS_REL_GENERAL (0<<6) /* default */ #define I915_EXEC_CONSTANTS_ABSOLUTE (1<<6) #define I915_EXEC_CONSTANTS_REL_SURFACE (2<<6) /* gen4/5 only */ /** Resets the SO write offset registers for transform feedback on gen7. */ #define I915_EXEC_GEN7_SOL_RESET (1<<8) /** Request a privileged ("secure") batch buffer. Note only available for * DRM_ROOT_ONLY | DRM_MASTER processes. */ #define I915_EXEC_SECURE (1<<9) /** Inform the kernel that the batch is and will always be pinned. This * negates the requirement for a workaround to be performed to avoid * an incoherent CS (such as can be found on 830/845). If this flag is * not passed, the kernel will endeavour to make sure the batch is * coherent with the CS before execution. If this flag is passed, * userspace assumes the responsibility for ensuring the same. */ #define I915_EXEC_IS_PINNED (1<<10) /** Provide a hint to the kernel that the command stream and auxiliary * state buffers already holds the correct presumed addresses and so the * relocation process may be skipped if no buffers need to be moved in * preparation for the execbuffer. */ #define I915_EXEC_NO_RELOC (1<<11) /** Use the reloc.handle as an index into the exec object array rather * than as the per-file handle. */ #define I915_EXEC_HANDLE_LUT (1<<12) /** Used for switching BSD rings on the platforms with two BSD rings */ #define I915_EXEC_BSD_SHIFT (13) #define I915_EXEC_BSD_MASK (3 << I915_EXEC_BSD_SHIFT) /* default ping-pong mode */ #define I915_EXEC_BSD_DEFAULT (0 << I915_EXEC_BSD_SHIFT) #define I915_EXEC_BSD_RING1 (1 << I915_EXEC_BSD_SHIFT) #define I915_EXEC_BSD_RING2 (2 << I915_EXEC_BSD_SHIFT) /** Tell the kernel that the batchbuffer is processed by * the resource streamer. */ #define I915_EXEC_RESOURCE_STREAMER (1<<15) /* Setting I915_EXEC_FENCE_IN implies that lower_32_bits(rsvd2) represent * a sync_file fd to wait upon (in a nonblocking manner) prior to executing * the batch. * * Returns -EINVAL if the sync_file fd cannot be found. */ #define I915_EXEC_FENCE_IN (1<<16) /* Setting I915_EXEC_FENCE_OUT causes the ioctl to return a sync_file fd * in the upper_32_bits(rsvd2) upon success. Ownership of the fd is given * to the caller, and it should be close() after use. (The fd is a regular * file descriptor and will be cleaned up on process termination. It holds * a reference to the request, but nothing else.) * * The sync_file fd can be combined with other sync_file and passed either * to execbuf using I915_EXEC_FENCE_IN, to atomic KMS ioctls (so that a flip * will only occur after this request completes), or to other devices. * * Using I915_EXEC_FENCE_OUT requires use of * DRM_IOCTL_I915_GEM_EXECBUFFER2_WR ioctl so that the result is written * back to userspace. Failure to do so will cause the out-fence to always * be reported as zero, and the real fence fd to be leaked. */ #define I915_EXEC_FENCE_OUT (1<<17) /* * Traditionally the execbuf ioctl has only considered the final element in * the execobject[] to be the executable batch. Often though, the client * will known the batch object prior to construction and being able to place * it into the execobject[] array first can simplify the relocation tracking. * Setting I915_EXEC_BATCH_FIRST tells execbuf to use element 0 of the * execobject[] as the * batch instead (the default is to use the last * element). */ #define I915_EXEC_BATCH_FIRST (1<<18) /* Setting I915_FENCE_ARRAY implies that num_cliprects and cliprects_ptr * define an array of i915_gem_exec_fence structures which specify a set of * dma fences to wait upon or signal. */ #define I915_EXEC_FENCE_ARRAY (1<<19) /* * Setting I915_EXEC_FENCE_SUBMIT implies that lower_32_bits(rsvd2) represent * a sync_file fd to wait upon (in a nonblocking manner) prior to executing * the batch. * * Returns -EINVAL if the sync_file fd cannot be found. */ #define I915_EXEC_FENCE_SUBMIT (1 << 20) /* * Setting I915_EXEC_USE_EXTENSIONS implies that * drm_i915_gem_execbuffer2.cliprects_ptr is treated as a pointer to an linked * list of i915_user_extension. Each i915_user_extension node is the base of a * larger structure. The list of supported structures are listed in the * drm_i915_gem_execbuffer_ext enum. */ #define I915_EXEC_USE_EXTENSIONS (1 << 21) #define __I915_EXEC_UNKNOWN_FLAGS (-(I915_EXEC_USE_EXTENSIONS << 1)) /** @rsvd1: Context id */ __u64 rsvd1; /** * @rsvd2: in and out sync_file file descriptors. * * When I915_EXEC_FENCE_IN or I915_EXEC_FENCE_SUBMIT flag is set, the * lower 32 bits of this field will have the in sync_file fd (input). * * When I915_EXEC_FENCE_OUT flag is set, the upper 32 bits of this * field will have the out sync_file fd (output). */ __u64 rsvd2; }; #define I915_EXEC_CONTEXT_ID_MASK (0xffffffff) #define i915_execbuffer2_set_context_id(eb2, context) \ (eb2).rsvd1 = context & I915_EXEC_CONTEXT_ID_MASK #define i915_execbuffer2_get_context_id(eb2) \ ((eb2).rsvd1 & I915_EXEC_CONTEXT_ID_MASK) struct drm_i915_gem_pin { /** Handle of the buffer to be pinned. */ __u32 handle; __u32 pad; /** alignment required within the aperture */ __u64 alignment; /** Returned GTT offset of the buffer. */ __u64 offset; }; struct drm_i915_gem_unpin { /** Handle of the buffer to be unpinned. */ __u32 handle; __u32 pad; }; struct drm_i915_gem_busy { /** Handle of the buffer to check for busy */ __u32 handle; /** Return busy status * * A return of 0 implies that the object is idle (after * having flushed any pending activity), and a non-zero return that * the object is still in-flight on the GPU. (The GPU has not yet * signaled completion for all pending requests that reference the * object.) An object is guaranteed to become idle eventually (so * long as no new GPU commands are executed upon it). Due to the * asynchronous nature of the hardware, an object reported * as busy may become idle before the ioctl is completed. * * Furthermore, if the object is busy, which engine is busy is only * provided as a guide and only indirectly by reporting its class * (there may be more than one engine in each class). There are race * conditions which prevent the report of which engines are busy from * being always accurate. However, the converse is not true. If the * object is idle, the result of the ioctl, that all engines are idle, * is accurate. * * The returned dword is split into two fields to indicate both * the engine classess on which the object is being read, and the * engine class on which it is currently being written (if any). * * The low word (bits 0:15) indicate if the object is being written * to by any engine (there can only be one, as the GEM implicit * synchronisation rules force writes to be serialised). Only the * engine class (offset by 1, I915_ENGINE_CLASS_RENDER is reported as * 1 not 0 etc) for the last write is reported. * * The high word (bits 16:31) are a bitmask of which engines classes * are currently reading from the object. Multiple engines may be * reading from the object simultaneously. * * The value of each engine class is the same as specified in the * I915_CONTEXT_PARAM_ENGINES context parameter and via perf, i.e. * I915_ENGINE_CLASS_RENDER, I915_ENGINE_CLASS_COPY, etc. * Some hardware may have parallel execution engines, e.g. multiple * media engines, which are mapped to the same class identifier and so * are not separately reported for busyness. * * Caveat emptor: * Only the boolean result of this query is reliable; that is whether * the object is idle or busy. The report of which engines are busy * should be only used as a heuristic. */ __u32 busy; }; /** * struct drm_i915_gem_caching - Set or get the caching for given object * handle. * * Allow userspace to control the GTT caching bits for a given object when the * object is later mapped through the ppGTT(or GGTT on older platforms lacking * ppGTT support, or if the object is used for scanout). Note that this might * require unbinding the object from the GTT first, if its current caching value * doesn't match. * * Note that this all changes on discrete platforms, starting from DG1, the * set/get caching is no longer supported, and is now rejected. Instead the CPU * caching attributes(WB vs WC) will become an immutable creation time property * for the object, along with the GTT caching level. For now we don't expose any * new uAPI for this, instead on DG1 this is all implicit, although this largely * shouldn't matter since DG1 is coherent by default(without any way of * controlling it). * * Implicit caching rules, starting from DG1: * * - If any of the object placements (see &drm_i915_gem_create_ext_memory_regions) * contain I915_MEMORY_CLASS_DEVICE then the object will be allocated and * mapped as write-combined only. * * - Everything else is always allocated and mapped as write-back, with the * guarantee that everything is also coherent with the GPU. * * Note that this is likely to change in the future again, where we might need * more flexibility on future devices, so making this all explicit as part of a * new &drm_i915_gem_create_ext extension is probable. * * Side note: Part of the reason for this is that changing the at-allocation-time CPU * caching attributes for the pages might be required(and is expensive) if we * need to then CPU map the pages later with different caching attributes. This * inconsistent caching behaviour, while supported on x86, is not universally * supported on other architectures. So for simplicity we opt for setting * everything at creation time, whilst also making it immutable, on discrete * platforms. */ struct drm_i915_gem_caching { /** * @handle: Handle of the buffer to set/get the caching level. */ __u32 handle; /** * @caching: The GTT caching level to apply or possible return value. * * The supported @caching values: * * I915_CACHING_NONE: * * GPU access is not coherent with CPU caches. Default for machines * without an LLC. This means manual flushing might be needed, if we * want GPU access to be coherent. * * I915_CACHING_CACHED: * * GPU access is coherent with CPU caches and furthermore the data is * cached in last-level caches shared between CPU cores and the GPU GT. * * I915_CACHING_DISPLAY: * * Special GPU caching mode which is coherent with the scanout engines. * Transparently falls back to I915_CACHING_NONE on platforms where no * special cache mode (like write-through or gfdt flushing) is * available. The kernel automatically sets this mode when using a * buffer as a scanout target. Userspace can manually set this mode to * avoid a costly stall and clflush in the hotpath of drawing the first * frame. */ #define I915_CACHING_NONE 0 #define I915_CACHING_CACHED 1 #define I915_CACHING_DISPLAY 2 __u32 caching; }; #define I915_TILING_NONE 0 #define I915_TILING_X 1 #define I915_TILING_Y 2 /* * Do not add new tiling types here. The I915_TILING_* values are for * de-tiling fence registers that no longer exist on modern platforms. Although * the hardware may support new types of tiling in general (e.g., Tile4), we * do not need to add them to the uapi that is specific to now-defunct ioctls. */ #define I915_TILING_LAST I915_TILING_Y #define I915_BIT_6_SWIZZLE_NONE 0 #define I915_BIT_6_SWIZZLE_9 1 #define I915_BIT_6_SWIZZLE_9_10 2 #define I915_BIT_6_SWIZZLE_9_11 3 #define I915_BIT_6_SWIZZLE_9_10_11 4 /* Not seen by userland */ #define I915_BIT_6_SWIZZLE_UNKNOWN 5 /* Seen by userland. */ #define I915_BIT_6_SWIZZLE_9_17 6 #define I915_BIT_6_SWIZZLE_9_10_17 7 struct drm_i915_gem_set_tiling { /** Handle of the buffer to have its tiling state updated */ __u32 handle; /** * Tiling mode for the object (I915_TILING_NONE, I915_TILING_X, * I915_TILING_Y). * * This value is to be set on request, and will be updated by the * kernel on successful return with the actual chosen tiling layout. * * The tiling mode may be demoted to I915_TILING_NONE when the system * has bit 6 swizzling that can't be managed correctly by GEM. * * Buffer contents become undefined when changing tiling_mode. */ __u32 tiling_mode; /** * Stride in bytes for the object when in I915_TILING_X or * I915_TILING_Y. */ __u32 stride; /** * Returned address bit 6 swizzling required for CPU access through * mmap mapping. */ __u32 swizzle_mode; }; struct drm_i915_gem_get_tiling { /** Handle of the buffer to get tiling state for. */ __u32 handle; /** * Current tiling mode for the object (I915_TILING_NONE, I915_TILING_X, * I915_TILING_Y). */ __u32 tiling_mode; /** * Returned address bit 6 swizzling required for CPU access through * mmap mapping. */ __u32 swizzle_mode; /** * Returned address bit 6 swizzling required for CPU access through * mmap mapping whilst bound. */ __u32 phys_swizzle_mode; }; struct drm_i915_gem_get_aperture { /** Total size of the aperture used by i915_gem_execbuffer, in bytes */ __u64 aper_size; /** * Available space in the aperture used by i915_gem_execbuffer, in * bytes */ __u64 aper_available_size; }; struct drm_i915_get_pipe_from_crtc_id { /** ID of CRTC being requested **/ __u32 crtc_id; /** pipe of requested CRTC **/ __u32 pipe; }; #define I915_MADV_WILLNEED 0 #define I915_MADV_DONTNEED 1 #define __I915_MADV_PURGED 2 /* internal state */ struct drm_i915_gem_madvise { /** Handle of the buffer to change the backing store advice */ __u32 handle; /* Advice: either the buffer will be needed again in the near future, * or wont be and could be discarded under memory pressure. */ __u32 madv; /** Whether the backing store still exists. */ __u32 retained; }; /* flags */ #define I915_OVERLAY_TYPE_MASK 0xff #define I915_OVERLAY_YUV_PLANAR 0x01 #define I915_OVERLAY_YUV_PACKED 0x02 #define I915_OVERLAY_RGB 0x03 #define I915_OVERLAY_DEPTH_MASK 0xff00 #define I915_OVERLAY_RGB24 0x1000 #define I915_OVERLAY_RGB16 0x2000 #define I915_OVERLAY_RGB15 0x3000 #define I915_OVERLAY_YUV422 0x0100 #define I915_OVERLAY_YUV411 0x0200 #define I915_OVERLAY_YUV420 0x0300 #define I915_OVERLAY_YUV410 0x0400 #define I915_OVERLAY_SWAP_MASK 0xff0000 #define I915_OVERLAY_NO_SWAP 0x000000 #define I915_OVERLAY_UV_SWAP 0x010000 #define I915_OVERLAY_Y_SWAP 0x020000 #define I915_OVERLAY_Y_AND_UV_SWAP 0x030000 #define I915_OVERLAY_FLAGS_MASK 0xff000000 #define I915_OVERLAY_ENABLE 0x01000000 struct drm_intel_overlay_put_image { /* various flags and src format description */ __u32 flags; /* source picture description */ __u32 bo_handle; /* stride values and offsets are in bytes, buffer relative */ __u16 stride_Y; /* stride for packed formats */ __u16 stride_UV; __u32 offset_Y; /* offset for packet formats */ __u32 offset_U; __u32 offset_V; /* in pixels */ __u16 src_width; __u16 src_height; /* to compensate the scaling factors for partially covered surfaces */ __u16 src_scan_width; __u16 src_scan_height; /* output crtc description */ __u32 crtc_id; __u16 dst_x; __u16 dst_y; __u16 dst_width; __u16 dst_height; }; /* flags */ #define I915_OVERLAY_UPDATE_ATTRS (1<<0) #define I915_OVERLAY_UPDATE_GAMMA (1<<1) #define I915_OVERLAY_DISABLE_DEST_COLORKEY (1<<2) struct drm_intel_overlay_attrs { __u32 flags; __u32 color_key; __s32 brightness; __u32 contrast; __u32 saturation; __u32 gamma0; __u32 gamma1; __u32 gamma2; __u32 gamma3; __u32 gamma4; __u32 gamma5; }; /* * Intel sprite handling * * Color keying works with a min/mask/max tuple. Both source and destination * color keying is allowed. * * Source keying: * Sprite pixels within the min & max values, masked against the color channels * specified in the mask field, will be transparent. All other pixels will * be displayed on top of the primary plane. For RGB surfaces, only the min * and mask fields will be used; ranged compares are not allowed. * * Destination keying: * Primary plane pixels that match the min value, masked against the color * channels specified in the mask field, will be replaced by corresponding * pixels from the sprite plane. * * Note that source & destination keying are exclusive; only one can be * active on a given plane. */ #define I915_SET_COLORKEY_NONE (1<<0) /* Deprecated. Instead set * flags==0 to disable colorkeying. */ #define I915_SET_COLORKEY_DESTINATION (1<<1) #define I915_SET_COLORKEY_SOURCE (1<<2) struct drm_intel_sprite_colorkey { __u32 plane_id; __u32 min_value; __u32 channel_mask; __u32 max_value; __u32 flags; }; struct drm_i915_gem_wait { /** Handle of BO we shall wait on */ __u32 bo_handle; __u32 flags; /** Number of nanoseconds to wait, Returns time remaining. */ __s64 timeout_ns; }; struct drm_i915_gem_context_create { __u32 ctx_id; /* output: id of new context*/ __u32 pad; }; /** * struct drm_i915_gem_context_create_ext - Structure for creating contexts. */ struct drm_i915_gem_context_create_ext { /** @ctx_id: Id of the created context (output) */ __u32 ctx_id; /** * @flags: Supported flags are: * * I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS: * * Extensions may be appended to this structure and driver must check * for those. See @extensions. * * I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE * * Created context will have single timeline. */ __u32 flags; #define I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS (1u << 0) #define I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE (1u << 1) #define I915_CONTEXT_CREATE_FLAGS_UNKNOWN \ (-(I915_CONTEXT_CREATE_FLAGS_SINGLE_TIMELINE << 1)) /** * @extensions: Zero-terminated chain of extensions. * * I915_CONTEXT_CREATE_EXT_SETPARAM: * Context parameter to set or query during context creation. * See struct drm_i915_gem_context_create_ext_setparam. * * I915_CONTEXT_CREATE_EXT_CLONE: * This extension has been removed. On the off chance someone somewhere * has attempted to use it, never re-use this extension number. */ __u64 extensions; #define I915_CONTEXT_CREATE_EXT_SETPARAM 0 #define I915_CONTEXT_CREATE_EXT_CLONE 1 }; /** * struct drm_i915_gem_context_param - Context parameter to set or query. */ struct drm_i915_gem_context_param { /** @ctx_id: Context id */ __u32 ctx_id; /** @size: Size of the parameter @value */ __u32 size; /** @param: Parameter to set or query */ __u64 param; #define I915_CONTEXT_PARAM_BAN_PERIOD 0x1 /* I915_CONTEXT_PARAM_NO_ZEROMAP has been removed. On the off chance * someone somewhere has attempted to use it, never re-use this context * param number. */ #define I915_CONTEXT_PARAM_NO_ZEROMAP 0x2 #define I915_CONTEXT_PARAM_GTT_SIZE 0x3 #define I915_CONTEXT_PARAM_NO_ERROR_CAPTURE 0x4 #define I915_CONTEXT_PARAM_BANNABLE 0x5 #define I915_CONTEXT_PARAM_PRIORITY 0x6 #define I915_CONTEXT_MAX_USER_PRIORITY 1023 /* inclusive */ #define I915_CONTEXT_DEFAULT_PRIORITY 0 #define I915_CONTEXT_MIN_USER_PRIORITY -1023 /* inclusive */ /* * When using the following param, value should be a pointer to * drm_i915_gem_context_param_sseu. */ #define I915_CONTEXT_PARAM_SSEU 0x7 /* * Not all clients may want to attempt automatic recover of a context after * a hang (for example, some clients may only submit very small incremental * batches relying on known logical state of previous batches which will never * recover correctly and each attempt will hang), and so would prefer that * the context is forever banned instead. * * If set to false (0), after a reset, subsequent (and in flight) rendering * from this context is discarded, and the client will need to create a new * context to use instead. * * If set to true (1), the kernel will automatically attempt to recover the * context by skipping the hanging batch and executing the next batch starting * from the default context state (discarding the incomplete logical context * state lost due to the reset). * * On creation, all new contexts are marked as recoverable. */ #define I915_CONTEXT_PARAM_RECOVERABLE 0x8 /* * The id of the associated virtual memory address space (ppGTT) of * this context. Can be retrieved and passed to another context * (on the same fd) for both to use the same ppGTT and so share * address layouts, and avoid reloading the page tables on context * switches between themselves. * * See DRM_I915_GEM_VM_CREATE and DRM_I915_GEM_VM_DESTROY. */ #define I915_CONTEXT_PARAM_VM 0x9 /* * I915_CONTEXT_PARAM_ENGINES: * * Bind this context to operate on this subset of available engines. Henceforth, * the I915_EXEC_RING selector for DRM_IOCTL_I915_GEM_EXECBUFFER2 operates as * an index into this array of engines; I915_EXEC_DEFAULT selecting engine[0] * and upwards. Slots 0...N are filled in using the specified (class, instance). * Use * engine_class: I915_ENGINE_CLASS_INVALID, * engine_instance: I915_ENGINE_CLASS_INVALID_NONE * to specify a gap in the array that can be filled in later, e.g. by a * virtual engine used for load balancing. * * Setting the number of engines bound to the context to 0, by passing a zero * sized argument, will revert back to default settings. * * See struct i915_context_param_engines. * * Extensions: * i915_context_engines_load_balance (I915_CONTEXT_ENGINES_EXT_LOAD_BALANCE) * i915_context_engines_bond (I915_CONTEXT_ENGINES_EXT_BOND) * i915_context_engines_parallel_submit (I915_CONTEXT_ENGINES_EXT_PARALLEL_SUBMIT) */ #define I915_CONTEXT_PARAM_ENGINES 0xa /* * I915_CONTEXT_PARAM_PERSISTENCE: * * Allow the context and active rendering to survive the process until * completion. Persistence allows fire-and-forget clients to queue up a * bunch of work, hand the output over to a display server and then quit. * If the context is marked as not persistent, upon closing (either via * an explicit DRM_I915_GEM_CONTEXT_DESTROY or implicitly from file closure * or process termination), the context and any outstanding requests will be * cancelled (and exported fences for cancelled requests marked as -EIO). * * By default, new contexts allow persistence. */ #define I915_CONTEXT_PARAM_PERSISTENCE 0xb /* This API has been removed. On the off chance someone somewhere has * attempted to use it, never re-use this context param number. */ #define I915_CONTEXT_PARAM_RINGSIZE 0xc /* * I915_CONTEXT_PARAM_PROTECTED_CONTENT: * * Mark that the context makes use of protected content, which will result * in the context being invalidated when the protected content session is. * Given that the protected content session is killed on suspend, the device * is kept awake for the lifetime of a protected context, so the user should * make sure to dispose of them once done. * This flag can only be set at context creation time and, when set to true, * must be preceded by an explicit setting of I915_CONTEXT_PARAM_RECOVERABLE * to false. This flag can't be set to true in conjunction with setting the * I915_CONTEXT_PARAM_BANNABLE flag to false. Creation example: * * .. code-block:: C * * struct drm_i915_gem_context_create_ext_setparam p_protected = { * .base = { * .name = I915_CONTEXT_CREATE_EXT_SETPARAM, * }, * .param = { * .param = I915_CONTEXT_PARAM_PROTECTED_CONTENT, * .value = 1, * } * }; * struct drm_i915_gem_context_create_ext_setparam p_norecover = { * .base = { * .name = I915_CONTEXT_CREATE_EXT_SETPARAM, * .next_extension = to_user_pointer(&p_protected), * }, * .param = { * .param = I915_CONTEXT_PARAM_RECOVERABLE, * .value = 0, * } * }; * struct drm_i915_gem_context_create_ext create = { * .flags = I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS, * .extensions = to_user_pointer(&p_norecover); * }; * * ctx_id = gem_context_create_ext(drm_fd, &create); * * In addition to the normal failure cases, setting this flag during context * creation can result in the following errors: * * -ENODEV: feature not available * -EPERM: trying to mark a recoverable or not bannable context as protected */ #define I915_CONTEXT_PARAM_PROTECTED_CONTENT 0xd /* Must be kept compact -- no holes and well documented */ /** @value: Context parameter value to be set or queried */ __u64 value; }; /* * Context SSEU programming * * It may be necessary for either functional or performance reason to configure * a context to run with a reduced number of SSEU (where SSEU stands for Slice/ * Sub-slice/EU). * * This is done by configuring SSEU configuration using the below * @struct drm_i915_gem_context_param_sseu for every supported engine which * userspace intends to use. * * Not all GPUs or engines support this functionality in which case an error * code -ENODEV will be returned. * * Also, flexibility of possible SSEU configuration permutations varies between * GPU generations and software imposed limitations. Requesting such a * combination will return an error code of -EINVAL. * * NOTE: When perf/OA is active the context's SSEU configuration is ignored in * favour of a single global setting. */ struct drm_i915_gem_context_param_sseu { /* * Engine class & instance to be configured or queried. */ struct i915_engine_class_instance engine; /* * Unknown flags must be cleared to zero. */ __u32 flags; #define I915_CONTEXT_SSEU_FLAG_ENGINE_INDEX (1u << 0) /* * Mask of slices to enable for the context. Valid values are a subset * of the bitmask value returned for I915_PARAM_SLICE_MASK. */ __u64 slice_mask; /* * Mask of subslices to enable for the context. Valid values are a * subset of the bitmask value return by I915_PARAM_SUBSLICE_MASK. */ __u64 subslice_mask; /* * Minimum/Maximum number of EUs to enable per subslice for the * context. min_eus_per_subslice must be inferior or equal to * max_eus_per_subslice. */ __u16 min_eus_per_subslice; __u16 max_eus_per_subslice; /* * Unused for now. Must be cleared to zero. */ __u32 rsvd; }; /** * DOC: Virtual Engine uAPI * * Virtual engine is a concept where userspace is able to configure a set of * physical engines, submit a batch buffer, and let the driver execute it on any * engine from the set as it sees fit. * * This is primarily useful on parts which have multiple instances of a same * class engine, like for example GT3+ Skylake parts with their two VCS engines. * * For instance userspace can enumerate all engines of a certain class using the * previously described `Engine Discovery uAPI`_. After that userspace can * create a GEM context with a placeholder slot for the virtual engine (using * `I915_ENGINE_CLASS_INVALID` and `I915_ENGINE_CLASS_INVALID_NONE` for class * and instance respectively) and finally using the * `I915_CONTEXT_ENGINES_EXT_LOAD_BALANCE` extension place a virtual engine in * the same reserved slot. * * Example of creating a virtual engine and submitting a batch buffer to it: * * .. code-block:: C * * I915_DEFINE_CONTEXT_ENGINES_LOAD_BALANCE(virtual, 2) = { * .base.name = I915_CONTEXT_ENGINES_EXT_LOAD_BALANCE, * .engine_index = 0, // Place this virtual engine into engine map slot 0 * .num_siblings = 2, * .engines = { { I915_ENGINE_CLASS_VIDEO, 0 }, * { I915_ENGINE_CLASS_VIDEO, 1 }, }, * }; * I915_DEFINE_CONTEXT_PARAM_ENGINES(engines, 1) = { * .engines = { { I915_ENGINE_CLASS_INVALID, * I915_ENGINE_CLASS_INVALID_NONE } }, * .extensions = to_user_pointer(&virtual), // Chains after load_balance extension * }; * struct drm_i915_gem_context_create_ext_setparam p_engines = { * .base = { * .name = I915_CONTEXT_CREATE_EXT_SETPARAM, * }, * .param = { * .param = I915_CONTEXT_PARAM_ENGINES, * .value = to_user_pointer(&engines), * .size = sizeof(engines), * }, * }; * struct drm_i915_gem_context_create_ext create = { * .flags = I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS, * .extensions = to_user_pointer(&p_engines); * }; * * ctx_id = gem_context_create_ext(drm_fd, &create); * * // Now we have created a GEM context with its engine map containing a * // single virtual engine. Submissions to this slot can go either to * // vcs0 or vcs1, depending on the load balancing algorithm used inside * // the driver. The load balancing is dynamic from one batch buffer to * // another and transparent to userspace. * * ... * execbuf.rsvd1 = ctx_id; * execbuf.flags = 0; // Submits to index 0 which is the virtual engine * gem_execbuf(drm_fd, &execbuf); */ /* * i915_context_engines_load_balance: * * Enable load balancing across this set of engines. * * Into the I915_EXEC_DEFAULT slot [0], a virtual engine is created that when * used will proxy the execbuffer request onto one of the set of engines * in such a way as to distribute the load evenly across the set. * * The set of engines must be compatible (e.g. the same HW class) as they * will share the same logical GPU context and ring. * * To intermix rendering with the virtual engine and direct rendering onto * the backing engines (bypassing the load balancing proxy), the context must * be defined to use a single timeline for all engines. */ struct i915_context_engines_load_balance { struct i915_user_extension base; __u16 engine_index; __u16 num_siblings; __u32 flags; /* all undefined flags must be zero */ __u64 mbz64; /* reserved for future use; must be zero */ struct i915_engine_class_instance engines[]; } __attribute__((packed)); #define I915_DEFINE_CONTEXT_ENGINES_LOAD_BALANCE(name__, N__) struct { \ struct i915_user_extension base; \ __u16 engine_index; \ __u16 num_siblings; \ __u32 flags; \ __u64 mbz64; \ struct i915_engine_class_instance engines[N__]; \ } __attribute__((packed)) name__ /* * i915_context_engines_bond: * * Constructed bonded pairs for execution within a virtual engine. * * All engines are equal, but some are more equal than others. Given * the distribution of resources in the HW, it may be preferable to run * a request on a given subset of engines in parallel to a request on a * specific engine. We enable this selection of engines within a virtual * engine by specifying bonding pairs, for any given master engine we will * only execute on one of the corresponding siblings within the virtual engine. * * To execute a request in parallel on the master engine and a sibling requires * coordination with a I915_EXEC_FENCE_SUBMIT. */ struct i915_context_engines_bond { struct i915_user_extension base; struct i915_engine_class_instance master; __u16 virtual_index; /* index of virtual engine in ctx->engines[] */ __u16 num_bonds; __u64 flags; /* all undefined flags must be zero */ __u64 mbz64[4]; /* reserved for future use; must be zero */ struct i915_engine_class_instance engines[]; } __attribute__((packed)); #define I915_DEFINE_CONTEXT_ENGINES_BOND(name__, N__) struct { \ struct i915_user_extension base; \ struct i915_engine_class_instance master; \ __u16 virtual_index; \ __u16 num_bonds; \ __u64 flags; \ __u64 mbz64[4]; \ struct i915_engine_class_instance engines[N__]; \ } __attribute__((packed)) name__ /** * struct i915_context_engines_parallel_submit - Configure engine for * parallel submission. * * Setup a slot in the context engine map to allow multiple BBs to be submitted * in a single execbuf IOCTL. Those BBs will then be scheduled to run on the GPU * in parallel. Multiple hardware contexts are created internally in the i915 to * run these BBs. Once a slot is configured for N BBs only N BBs can be * submitted in each execbuf IOCTL and this is implicit behavior e.g. The user * doesn't tell the execbuf IOCTL there are N BBs, the execbuf IOCTL knows how * many BBs there are based on the slot's configuration. The N BBs are the last * N buffer objects or first N if I915_EXEC_BATCH_FIRST is set. * * The default placement behavior is to create implicit bonds between each * context if each context maps to more than 1 physical engine (e.g. context is * a virtual engine). Also we only allow contexts of same engine class and these * contexts must be in logically contiguous order. Examples of the placement * behavior are described below. Lastly, the default is to not allow BBs to be * preempted mid-batch. Rather insert coordinated preemption points on all * hardware contexts between each set of BBs. Flags could be added in the future * to change both of these default behaviors. * * Returns -EINVAL if hardware context placement configuration is invalid or if * the placement configuration isn't supported on the platform / submission * interface. * Returns -ENODEV if extension isn't supported on the platform / submission * interface. * * .. code-block:: none * * Examples syntax: * CS[X] = generic engine of same class, logical instance X * INVALID = I915_ENGINE_CLASS_INVALID, I915_ENGINE_CLASS_INVALID_NONE * * Example 1 pseudo code: * set_engines(INVALID) * set_parallel(engine_index=0, width=2, num_siblings=1, * engines=CS[0],CS[1]) * * Results in the following valid placement: * CS[0], CS[1] * * Example 2 pseudo code: * set_engines(INVALID) * set_parallel(engine_index=0, width=2, num_siblings=2, * engines=CS[0],CS[2],CS[1],CS[3]) * * Results in the following valid placements: * CS[0], CS[1] * CS[2], CS[3] * * This can be thought of as two virtual engines, each containing two * engines thereby making a 2D array. However, there are bonds tying the * entries together and placing restrictions on how they can be scheduled. * Specifically, the scheduler can choose only vertical columns from the 2D * array. That is, CS[0] is bonded to CS[1] and CS[2] to CS[3]. So if the * scheduler wants to submit to CS[0], it must also choose CS[1] and vice * versa. Same for CS[2] requires also using CS[3]. * VE[0] = CS[0], CS[2] * VE[1] = CS[1], CS[3] * * Example 3 pseudo code: * set_engines(INVALID) * set_parallel(engine_index=0, width=2, num_siblings=2, * engines=CS[0],CS[1],CS[1],CS[3]) * * Results in the following valid and invalid placements: * CS[0], CS[1] * CS[1], CS[3] - Not logically contiguous, return -EINVAL */ struct i915_context_engines_parallel_submit { /** * @base: base user extension. */ struct i915_user_extension base; /** * @engine_index: slot for parallel engine */ __u16 engine_index; /** * @width: number of contexts per parallel engine or in other words the * number of batches in each submission */ __u16 width; /** * @num_siblings: number of siblings per context or in other words the * number of possible placements for each submission */ __u16 num_siblings; /** * @mbz16: reserved for future use; must be zero */ __u16 mbz16; /** * @flags: all undefined flags must be zero, currently not defined flags */ __u64 flags; /** * @mbz64: reserved for future use; must be zero */ __u64 mbz64[3]; /** * @engines: 2-d array of engine instances to configure parallel engine * * length = width (i) * num_siblings (j) * index = j + i * num_siblings */ struct i915_engine_class_instance engines[]; } __attribute__((packed)); #define I915_DEFINE_CONTEXT_ENGINES_PARALLEL_SUBMIT(name__, N__) struct { \ struct i915_user_extension base; \ __u16 engine_index; \ __u16 width; \ __u16 num_siblings; \ __u16 mbz16; \ __u64 flags; \ __u64 mbz64[3]; \ struct i915_engine_class_instance engines[N__]; \ } __attribute__((packed)) name__ /** * DOC: Context Engine Map uAPI * * Context engine map is a new way of addressing engines when submitting batch- * buffers, replacing the existing way of using identifiers like `I915_EXEC_BLT` * inside the flags field of `struct drm_i915_gem_execbuffer2`. * * To use it created GEM contexts need to be configured with a list of engines * the user is intending to submit to. This is accomplished using the * `I915_CONTEXT_PARAM_ENGINES` parameter and `struct * i915_context_param_engines`. * * For such contexts the `I915_EXEC_RING_MASK` field becomes an index into the * configured map. * * Example of creating such context and submitting against it: * * .. code-block:: C * * I915_DEFINE_CONTEXT_PARAM_ENGINES(engines, 2) = { * .engines = { { I915_ENGINE_CLASS_RENDER, 0 }, * { I915_ENGINE_CLASS_COPY, 0 } } * }; * struct drm_i915_gem_context_create_ext_setparam p_engines = { * .base = { * .name = I915_CONTEXT_CREATE_EXT_SETPARAM, * }, * .param = { * .param = I915_CONTEXT_PARAM_ENGINES, * .value = to_user_pointer(&engines), * .size = sizeof(engines), * }, * }; * struct drm_i915_gem_context_create_ext create = { * .flags = I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS, * .extensions = to_user_pointer(&p_engines); * }; * * ctx_id = gem_context_create_ext(drm_fd, &create); * * // We have now created a GEM context with two engines in the map: * // Index 0 points to rcs0 while index 1 points to bcs0. Other engines * // will not be accessible from this context. * * ... * execbuf.rsvd1 = ctx_id; * execbuf.flags = 0; // Submits to index 0, which is rcs0 for this context * gem_execbuf(drm_fd, &execbuf); * * ... * execbuf.rsvd1 = ctx_id; * execbuf.flags = 1; // Submits to index 0, which is bcs0 for this context * gem_execbuf(drm_fd, &execbuf); */ struct i915_context_param_engines { __u64 extensions; /* linked chain of extension blocks, 0 terminates */ #define I915_CONTEXT_ENGINES_EXT_LOAD_BALANCE 0 /* see i915_context_engines_load_balance */ #define I915_CONTEXT_ENGINES_EXT_BOND 1 /* see i915_context_engines_bond */ #define I915_CONTEXT_ENGINES_EXT_PARALLEL_SUBMIT 2 /* see i915_context_engines_parallel_submit */ struct i915_engine_class_instance engines[0]; } __attribute__((packed)); #define I915_DEFINE_CONTEXT_PARAM_ENGINES(name__, N__) struct { \ __u64 extensions; \ struct i915_engine_class_instance engines[N__]; \ } __attribute__((packed)) name__ /** * struct drm_i915_gem_context_create_ext_setparam - Context parameter * to set or query during context creation. */ struct drm_i915_gem_context_create_ext_setparam { /** @base: Extension link. See struct i915_user_extension. */ struct i915_user_extension base; /** * @param: Context parameter to set or query. * See struct drm_i915_gem_context_param. */ struct drm_i915_gem_context_param param; }; struct drm_i915_gem_context_destroy { __u32 ctx_id; __u32 pad; }; /** * struct drm_i915_gem_vm_control - Structure to create or destroy VM. * * DRM_I915_GEM_VM_CREATE - * * Create a new virtual memory address space (ppGTT) for use within a context * on the same file. Extensions can be provided to configure exactly how the * address space is setup upon creation. * * The id of new VM (bound to the fd) for use with I915_CONTEXT_PARAM_VM is * returned in the outparam @id. * * An extension chain maybe provided, starting with @extensions, and terminated * by the @next_extension being 0. Currently, no extensions are defined. * * DRM_I915_GEM_VM_DESTROY - * * Destroys a previously created VM id, specified in @vm_id. * * No extensions or flags are allowed currently, and so must be zero. */ struct drm_i915_gem_vm_control { /** @extensions: Zero-terminated chain of extensions. */ __u64 extensions; /** @flags: reserved for future usage, currently MBZ */ __u32 flags; /** @vm_id: Id of the VM created or to be destroyed */ __u32 vm_id; }; struct drm_i915_reg_read { /* * Register offset. * For 64bit wide registers where the upper 32bits don't immediately * follow the lower 32bits, the offset of the lower 32bits must * be specified */ __u64 offset; #define I915_REG_READ_8B_WA (1ul << 0) __u64 val; /* Return value */ }; /* Known registers: * * Render engine timestamp - 0x2358 + 64bit - gen7+ * - Note this register returns an invalid value if using the default * single instruction 8byte read, in order to workaround that pass * flag I915_REG_READ_8B_WA in offset field. * */ struct drm_i915_reset_stats { __u32 ctx_id; __u32 flags; /* All resets since boot/module reload, for all contexts */ __u32 reset_count; /* Number of batches lost when active in GPU, for this context */ __u32 batch_active; /* Number of batches lost pending for execution, for this context */ __u32 batch_pending; __u32 pad; }; /** * struct drm_i915_gem_userptr - Create GEM object from user allocated memory. * * Userptr objects have several restrictions on what ioctls can be used with the * object handle. */ struct drm_i915_gem_userptr { /** * @user_ptr: The pointer to the allocated memory. * * Needs to be aligned to PAGE_SIZE. */ __u64 user_ptr; /** * @user_size: * * The size in bytes for the allocated memory. This will also become the * object size. * * Needs to be aligned to PAGE_SIZE, and should be at least PAGE_SIZE, * or larger. */ __u64 user_size; /** * @flags: * * Supported flags: * * I915_USERPTR_READ_ONLY: * * Mark the object as readonly, this also means GPU access can only be * readonly. This is only supported on HW which supports readonly access * through the GTT. If the HW can't support readonly access, an error is * returned. * * I915_USERPTR_PROBE: * * Probe the provided @user_ptr range and validate that the @user_ptr is * indeed pointing to normal memory and that the range is also valid. * For example if some garbage address is given to the kernel, then this * should complain. * * Returns -EFAULT if the probe failed. * * Note that this doesn't populate the backing pages, and also doesn't * guarantee that the object will remain valid when the object is * eventually used. * * The kernel supports this feature if I915_PARAM_HAS_USERPTR_PROBE * returns a non-zero value. * * I915_USERPTR_UNSYNCHRONIZED: * * NOT USED. Setting this flag will result in an error. */ __u32 flags; #define I915_USERPTR_READ_ONLY 0x1 #define I915_USERPTR_PROBE 0x2 #define I915_USERPTR_UNSYNCHRONIZED 0x80000000 /** * @handle: Returned handle for the object. * * Object handles are nonzero. */ __u32 handle; }; enum drm_i915_oa_format { I915_OA_FORMAT_A13 = 1, /* HSW only */ I915_OA_FORMAT_A29, /* HSW only */ I915_OA_FORMAT_A13_B8_C8, /* HSW only */ I915_OA_FORMAT_B4_C8, /* HSW only */ I915_OA_FORMAT_A45_B8_C8, /* HSW only */ I915_OA_FORMAT_B4_C8_A16, /* HSW only */ I915_OA_FORMAT_C4_B8, /* HSW+ */ /* Gen8+ */ I915_OA_FORMAT_A12, I915_OA_FORMAT_A12_B8_C8, I915_OA_FORMAT_A32u40_A4u32_B8_C8, /* DG2 */ I915_OAR_FORMAT_A32u40_A4u32_B8_C8, I915_OA_FORMAT_A24u40_A14u32_B8_C8, I915_OA_FORMAT_MAX /* non-ABI */ }; enum drm_i915_perf_property_id { /** * Open the stream for a specific context handle (as used with * execbuffer2). A stream opened for a specific context this way * won't typically require root privileges. * * This property is available in perf revision 1. */ DRM_I915_PERF_PROP_CTX_HANDLE = 1, /** * A value of 1 requests the inclusion of raw OA unit reports as * part of stream samples. * * This property is available in perf revision 1. */ DRM_I915_PERF_PROP_SAMPLE_OA, /** * The value specifies which set of OA unit metrics should be * configured, defining the contents of any OA unit reports. * * This property is available in perf revision 1. */ DRM_I915_PERF_PROP_OA_METRICS_SET, /** * The value specifies the size and layout of OA unit reports. * * This property is available in perf revision 1. */ DRM_I915_PERF_PROP_OA_FORMAT, /** * Specifying this property implicitly requests periodic OA unit * sampling and (at least on Haswell) the sampling frequency is derived * from this exponent as follows: * * 80ns * 2^(period_exponent + 1) * * This property is available in perf revision 1. */ DRM_I915_PERF_PROP_OA_EXPONENT, /** * Specifying this property is only valid when specify a context to * filter with DRM_I915_PERF_PROP_CTX_HANDLE. Specifying this property * will hold preemption of the particular context we want to gather * performance data about. The execbuf2 submissions must include a * drm_i915_gem_execbuffer_ext_perf parameter for this to apply. * * This property is available in perf revision 3. */ DRM_I915_PERF_PROP_HOLD_PREEMPTION, /** * Specifying this pins all contexts to the specified SSEU power * configuration for the duration of the recording. * * This parameter's value is a pointer to a struct * drm_i915_gem_context_param_sseu. * * This property is available in perf revision 4. */ DRM_I915_PERF_PROP_GLOBAL_SSEU, /** * This optional parameter specifies the timer interval in nanoseconds * at which the i915 driver will check the OA buffer for available data. * Minimum allowed value is 100 microseconds. A default value is used by * the driver if this parameter is not specified. Note that larger timer * values will reduce cpu consumption during OA perf captures. However, * excessively large values would potentially result in OA buffer * overwrites as captures reach end of the OA buffer. * * This property is available in perf revision 5. */ DRM_I915_PERF_PROP_POLL_OA_PERIOD, DRM_I915_PERF_PROP_MAX /* non-ABI */ }; struct drm_i915_perf_open_param { __u32 flags; #define I915_PERF_FLAG_FD_CLOEXEC (1<<0) #define I915_PERF_FLAG_FD_NONBLOCK (1<<1) #define I915_PERF_FLAG_DISABLED (1<<2) /** The number of u64 (id, value) pairs */ __u32 num_properties; /** * Pointer to array of u64 (id, value) pairs configuring the stream * to open. */ __u64 properties_ptr; }; /* * Enable data capture for a stream that was either opened in a disabled state * via I915_PERF_FLAG_DISABLED or was later disabled via * I915_PERF_IOCTL_DISABLE. * * It is intended to be cheaper to disable and enable a stream than it may be * to close and re-open a stream with the same configuration. * * It's undefined whether any pending data for the stream will be lost. * * This ioctl is available in perf revision 1. */ #define I915_PERF_IOCTL_ENABLE _IO('i', 0x0) /* * Disable data capture for a stream. * * It is an error to try and read a stream that is disabled. * * This ioctl is available in perf revision 1. */ #define I915_PERF_IOCTL_DISABLE _IO('i', 0x1) /* * Change metrics_set captured by a stream. * * If the stream is bound to a specific context, the configuration change * will performed __inline__ with that context such that it takes effect before * the next execbuf submission. * * Returns the previously bound metrics set id, or a negative error code. * * This ioctl is available in perf revision 2. */ #define I915_PERF_IOCTL_CONFIG _IO('i', 0x2) /* * Common to all i915 perf records */ struct drm_i915_perf_record_header { __u32 type; __u16 pad; __u16 size; }; enum drm_i915_perf_record_type { /** * Samples are the work horse record type whose contents are extensible * and defined when opening an i915 perf stream based on the given * properties. * * Boolean properties following the naming convention * DRM_I915_PERF_SAMPLE_xyz_PROP request the inclusion of 'xyz' data in * every sample. * * The order of these sample properties given by userspace has no * affect on the ordering of data within a sample. The order is * documented here. * * struct { * struct drm_i915_perf_record_header header; * * { u32 oa_report[]; } && DRM_I915_PERF_PROP_SAMPLE_OA * }; */ DRM_I915_PERF_RECORD_SAMPLE = 1, /* * Indicates that one or more OA reports were not written by the * hardware. This can happen for example if an MI_REPORT_PERF_COUNT * command collides with periodic sampling - which would be more likely * at higher sampling frequencies. */ DRM_I915_PERF_RECORD_OA_REPORT_LOST = 2, /** * An error occurred that resulted in all pending OA reports being lost. */ DRM_I915_PERF_RECORD_OA_BUFFER_LOST = 3, DRM_I915_PERF_RECORD_MAX /* non-ABI */ }; /** * struct drm_i915_perf_oa_config * * Structure to upload perf dynamic configuration into the kernel. */ struct drm_i915_perf_oa_config { /** * @uuid: * * String formatted like "%\08x-%\04x-%\04x-%\04x-%\012x" */ char uuid[36]; /** * @n_mux_regs: * * Number of mux regs in &mux_regs_ptr. */ __u32 n_mux_regs; /** * @n_boolean_regs: * * Number of boolean regs in &boolean_regs_ptr. */ __u32 n_boolean_regs; /** * @n_flex_regs: * * Number of flex regs in &flex_regs_ptr. */ __u32 n_flex_regs; /** * @mux_regs_ptr: * * Pointer to tuples of u32 values (register address, value) for mux * registers. Expected length of buffer is (2 * sizeof(u32) * * &n_mux_regs). */ __u64 mux_regs_ptr; /** * @boolean_regs_ptr: * * Pointer to tuples of u32 values (register address, value) for mux * registers. Expected length of buffer is (2 * sizeof(u32) * * &n_boolean_regs). */ __u64 boolean_regs_ptr; /** * @flex_regs_ptr: * * Pointer to tuples of u32 values (register address, value) for mux * registers. Expected length of buffer is (2 * sizeof(u32) * * &n_flex_regs). */ __u64 flex_regs_ptr; }; /** * struct drm_i915_query_item - An individual query for the kernel to process. * * The behaviour is determined by the @query_id. Note that exactly what * @data_ptr is also depends on the specific @query_id. */ struct drm_i915_query_item { /** * @query_id: * * The id for this query. Currently accepted query IDs are: * - %DRM_I915_QUERY_TOPOLOGY_INFO (see struct drm_i915_query_topology_info) * - %DRM_I915_QUERY_ENGINE_INFO (see struct drm_i915_engine_info) * - %DRM_I915_QUERY_PERF_CONFIG (see struct drm_i915_query_perf_config) * - %DRM_I915_QUERY_MEMORY_REGIONS (see struct drm_i915_query_memory_regions) * - %DRM_I915_QUERY_HWCONFIG_BLOB (see `GuC HWCONFIG blob uAPI`) * - %DRM_I915_QUERY_GEOMETRY_SUBSLICES (see struct drm_i915_query_topology_info) */ __u64 query_id; #define DRM_I915_QUERY_TOPOLOGY_INFO 1 #define DRM_I915_QUERY_ENGINE_INFO 2 #define DRM_I915_QUERY_PERF_CONFIG 3 #define DRM_I915_QUERY_MEMORY_REGIONS 4 #define DRM_I915_QUERY_HWCONFIG_BLOB 5 #define DRM_I915_QUERY_GEOMETRY_SUBSLICES 6 /* Must be kept compact -- no holes and well documented */ /** * @length: * * When set to zero by userspace, this is filled with the size of the * data to be written at the @data_ptr pointer. The kernel sets this * value to a negative value to signal an error on a particular query * item. */ __s32 length; /** * @flags: * * When &query_id == %DRM_I915_QUERY_TOPOLOGY_INFO, must be 0. * * When &query_id == %DRM_I915_QUERY_PERF_CONFIG, must be one of the * following: * * - %DRM_I915_QUERY_PERF_CONFIG_LIST * - %DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID * - %DRM_I915_QUERY_PERF_CONFIG_FOR_UUID * * When &query_id == %DRM_I915_QUERY_GEOMETRY_SUBSLICES must contain * a struct i915_engine_class_instance that references a render engine. */ __u32 flags; #define DRM_I915_QUERY_PERF_CONFIG_LIST 1 #define DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID 2 #define DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID 3 /** * @data_ptr: * * Data will be written at the location pointed by @data_ptr when the * value of @length matches the length of the data to be written by the * kernel. */ __u64 data_ptr; }; /** * struct drm_i915_query - Supply an array of struct drm_i915_query_item for the * kernel to fill out. * * Note that this is generally a two step process for each struct * drm_i915_query_item in the array: * * 1. Call the DRM_IOCTL_I915_QUERY, giving it our array of struct * drm_i915_query_item, with &drm_i915_query_item.length set to zero. The * kernel will then fill in the size, in bytes, which tells userspace how * memory it needs to allocate for the blob(say for an array of properties). * * 2. Next we call DRM_IOCTL_I915_QUERY again, this time with the * &drm_i915_query_item.data_ptr equal to our newly allocated blob. Note that * the &drm_i915_query_item.length should still be the same as what the * kernel previously set. At this point the kernel can fill in the blob. * * Note that for some query items it can make sense for userspace to just pass * in a buffer/blob equal to or larger than the required size. In this case only * a single ioctl call is needed. For some smaller query items this can work * quite well. * */ struct drm_i915_query { /** @num_items: The number of elements in the @items_ptr array */ __u32 num_items; /** * @flags: Unused for now. Must be cleared to zero. */ __u32 flags; /** * @items_ptr: * * Pointer to an array of struct drm_i915_query_item. The number of * array elements is @num_items. */ __u64 items_ptr; }; /** * struct drm_i915_query_topology_info * * Describes slice/subslice/EU information queried by * %DRM_I915_QUERY_TOPOLOGY_INFO */ struct drm_i915_query_topology_info { /** * @flags: * * Unused for now. Must be cleared to zero. */ __u16 flags; /** * @max_slices: * * The number of bits used to express the slice mask. */ __u16 max_slices; /** * @max_subslices: * * The number of bits used to express the subslice mask. */ __u16 max_subslices; /** * @max_eus_per_subslice: * * The number of bits in the EU mask that correspond to a single * subslice's EUs. */ __u16 max_eus_per_subslice; /** * @subslice_offset: * * Offset in data[] at which the subslice masks are stored. */ __u16 subslice_offset; /** * @subslice_stride: * * Stride at which each of the subslice masks for each slice are * stored. */ __u16 subslice_stride; /** * @eu_offset: * * Offset in data[] at which the EU masks are stored. */ __u16 eu_offset; /** * @eu_stride: * * Stride at which each of the EU masks for each subslice are stored. */ __u16 eu_stride; /** * @data: * * Contains 3 pieces of information : * * - The slice mask with one bit per slice telling whether a slice is * available. The availability of slice X can be queried with the * following formula : * * .. code:: c * * (data[X / 8] >> (X % 8)) & 1 * * Starting with Xe_HP platforms, Intel hardware no longer has * traditional slices so i915 will always report a single slice * (hardcoded slicemask = 0x1) which contains all of the platform's * subslices. I.e., the mask here does not reflect any of the newer * hardware concepts such as "gslices" or "cslices" since userspace * is capable of inferring those from the subslice mask. * * - The subslice mask for each slice with one bit per subslice telling * whether a subslice is available. Starting with Gen12 we use the * term "subslice" to refer to what the hardware documentation * describes as a "dual-subslices." The availability of subslice Y * in slice X can be queried with the following formula : * * .. code:: c * * (data[subslice_offset + X * subslice_stride + Y / 8] >> (Y % 8)) & 1 * * - The EU mask for each subslice in each slice, with one bit per EU * telling whether an EU is available. The availability of EU Z in * subslice Y in slice X can be queried with the following formula : * * .. code:: c * * (data[eu_offset + * (X * max_subslices + Y) * eu_stride + * Z / 8 * ] >> (Z % 8)) & 1 */ __u8 data[]; }; /** * DOC: Engine Discovery uAPI * * Engine discovery uAPI is a way of enumerating physical engines present in a * GPU associated with an open i915 DRM file descriptor. This supersedes the old * way of using `DRM_IOCTL_I915_GETPARAM` and engine identifiers like * `I915_PARAM_HAS_BLT`. * * The need for this interface came starting with Icelake and newer GPUs, which * started to establish a pattern of having multiple engines of a same class, * where not all instances were always completely functionally equivalent. * * Entry point for this uapi is `DRM_IOCTL_I915_QUERY` with the * `DRM_I915_QUERY_ENGINE_INFO` as the queried item id. * * Example for getting the list of engines: * * .. code-block:: C * * struct drm_i915_query_engine_info *info; * struct drm_i915_query_item item = { * .query_id = DRM_I915_QUERY_ENGINE_INFO; * }; * struct drm_i915_query query = { * .num_items = 1, * .items_ptr = (uintptr_t)&item, * }; * int err, i; * * // First query the size of the blob we need, this needs to be large * // enough to hold our array of engines. The kernel will fill out the * // item.length for us, which is the number of bytes we need. * // * // Alternatively a large buffer can be allocated straight away enabling * // querying in one pass, in which case item.length should contain the * // length of the provided buffer. * err = ioctl(fd, DRM_IOCTL_I915_QUERY, &query); * if (err) ... * * info = calloc(1, item.length); * // Now that we allocated the required number of bytes, we call the ioctl * // again, this time with the data_ptr pointing to our newly allocated * // blob, which the kernel can then populate with info on all engines. * item.data_ptr = (uintptr_t)&info, * * err = ioctl(fd, DRM_IOCTL_I915_QUERY, &query); * if (err) ... * * // We can now access each engine in the array * for (i = 0; i < info->num_engines; i++) { * struct drm_i915_engine_info einfo = info->engines[i]; * u16 class = einfo.engine.class; * u16 instance = einfo.engine.instance; * .... * } * * free(info); * * Each of the enumerated engines, apart from being defined by its class and * instance (see `struct i915_engine_class_instance`), also can have flags and * capabilities defined as documented in i915_drm.h. * * For instance video engines which support HEVC encoding will have the * `I915_VIDEO_CLASS_CAPABILITY_HEVC` capability bit set. * * Engine discovery only fully comes to its own when combined with the new way * of addressing engines when submitting batch buffers using contexts with * engine maps configured. */ /** * struct drm_i915_engine_info * * Describes one engine and it's capabilities as known to the driver. */ struct drm_i915_engine_info { /** @engine: Engine class and instance. */ struct i915_engine_class_instance engine; /** @rsvd0: Reserved field. */ __u32 rsvd0; /** @flags: Engine flags. */ __u64 flags; #define I915_ENGINE_INFO_HAS_LOGICAL_INSTANCE (1 << 0) /** @capabilities: Capabilities of this engine. */ __u64 capabilities; #define I915_VIDEO_CLASS_CAPABILITY_HEVC (1 << 0) #define I915_VIDEO_AND_ENHANCE_CLASS_CAPABILITY_SFC (1 << 1) /** @logical_instance: Logical instance of engine */ __u16 logical_instance; /** @rsvd1: Reserved fields. */ __u16 rsvd1[3]; /** @rsvd2: Reserved fields. */ __u64 rsvd2[3]; }; /** * struct drm_i915_query_engine_info * * Engine info query enumerates all engines known to the driver by filling in * an array of struct drm_i915_engine_info structures. */ struct drm_i915_query_engine_info { /** @num_engines: Number of struct drm_i915_engine_info structs following. */ __u32 num_engines; /** @rsvd: MBZ */ __u32 rsvd[3]; /** @engines: Marker for drm_i915_engine_info structures. */ struct drm_i915_engine_info engines[]; }; /** * struct drm_i915_query_perf_config * * Data written by the kernel with query %DRM_I915_QUERY_PERF_CONFIG and * %DRM_I915_QUERY_GEOMETRY_SUBSLICES. */ struct drm_i915_query_perf_config { union { /** * @n_configs: * * When &drm_i915_query_item.flags == * %DRM_I915_QUERY_PERF_CONFIG_LIST, i915 sets this fields to * the number of configurations available. */ __u64 n_configs; /** * @config: * * When &drm_i915_query_item.flags == * %DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID, i915 will use the * value in this field as configuration identifier to decide * what data to write into config_ptr. */ __u64 config; /** * @uuid: * * When &drm_i915_query_item.flags == * %DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID, i915 will use the * value in this field as configuration identifier to decide * what data to write into config_ptr. * * String formatted like "%08x-%04x-%04x-%04x-%012x" */ char uuid[36]; }; /** * @flags: * * Unused for now. Must be cleared to zero. */ __u32 flags; /** * @data: * * When &drm_i915_query_item.flags == %DRM_I915_QUERY_PERF_CONFIG_LIST, * i915 will write an array of __u64 of configuration identifiers. * * When &drm_i915_query_item.flags == %DRM_I915_QUERY_PERF_CONFIG_DATA, * i915 will write a struct drm_i915_perf_oa_config. If the following * fields of struct drm_i915_perf_oa_config are not set to 0, i915 will * write into the associated pointers the values of submitted when the * configuration was created : * * - &drm_i915_perf_oa_config.n_mux_regs * - &drm_i915_perf_oa_config.n_boolean_regs * - &drm_i915_perf_oa_config.n_flex_regs */ __u8 data[]; }; /** * enum drm_i915_gem_memory_class - Supported memory classes */ enum drm_i915_gem_memory_class { /** @I915_MEMORY_CLASS_SYSTEM: System memory */ I915_MEMORY_CLASS_SYSTEM = 0, /** @I915_MEMORY_CLASS_DEVICE: Device local-memory */ I915_MEMORY_CLASS_DEVICE, }; /** * struct drm_i915_gem_memory_class_instance - Identify particular memory region */ struct drm_i915_gem_memory_class_instance { /** @memory_class: See enum drm_i915_gem_memory_class */ __u16 memory_class; /** @memory_instance: Which instance */ __u16 memory_instance; }; /** * struct drm_i915_memory_region_info - Describes one region as known to the * driver. * * Note this is using both struct drm_i915_query_item and struct drm_i915_query. * For this new query we are adding the new query id DRM_I915_QUERY_MEMORY_REGIONS * at &drm_i915_query_item.query_id. */ struct drm_i915_memory_region_info { /** @region: The class:instance pair encoding */ struct drm_i915_gem_memory_class_instance region; /** @rsvd0: MBZ */ __u32 rsvd0; /** * @probed_size: Memory probed by the driver * * Note that it should not be possible to ever encounter a zero value * here, also note that no current region type will ever return -1 here. * Although for future region types, this might be a possibility. The * same applies to the other size fields. */ __u64 probed_size; /** * @unallocated_size: Estimate of memory remaining * * Requires CAP_PERFMON or CAP_SYS_ADMIN to get reliable accounting. * Without this (or if this is an older kernel) the value here will * always equal the @probed_size. Note this is only currently tracked * for I915_MEMORY_CLASS_DEVICE regions (for other types the value here * will always equal the @probed_size). */ __u64 unallocated_size; union { /** @rsvd1: MBZ */ __u64 rsvd1[8]; struct { /** * @probed_cpu_visible_size: Memory probed by the driver * that is CPU accessible. * * This will be always be <= @probed_size, and the * remainder (if there is any) will not be CPU * accessible. * * On systems without small BAR, the @probed_size will * always equal the @probed_cpu_visible_size, since all * of it will be CPU accessible. * * Note this is only tracked for * I915_MEMORY_CLASS_DEVICE regions (for other types the * value here will always equal the @probed_size). * * Note that if the value returned here is zero, then * this must be an old kernel which lacks the relevant * small-bar uAPI support (including * I915_GEM_CREATE_EXT_FLAG_NEEDS_CPU_ACCESS), but on * such systems we should never actually end up with a * small BAR configuration, assuming we are able to load * the kernel module. Hence it should be safe to treat * this the same as when @probed_cpu_visible_size == * @probed_size. */ __u64 probed_cpu_visible_size; /** * @unallocated_cpu_visible_size: Estimate of CPU * visible memory remaining. * * Note this is only tracked for * I915_MEMORY_CLASS_DEVICE regions (for other types the * value here will always equal the * @probed_cpu_visible_size). * * Requires CAP_PERFMON or CAP_SYS_ADMIN to get reliable * accounting. Without this the value here will always * equal the @probed_cpu_visible_size. Note this is only * currently tracked for I915_MEMORY_CLASS_DEVICE * regions (for other types the value here will also * always equal the @probed_cpu_visible_size). * * If this is an older kernel the value here will be * zero, see also @probed_cpu_visible_size. */ __u64 unallocated_cpu_visible_size; }; }; }; /** * struct drm_i915_query_memory_regions * * The region info query enumerates all regions known to the driver by filling * in an array of struct drm_i915_memory_region_info structures. * * Example for getting the list of supported regions: * * .. code-block:: C * * struct drm_i915_query_memory_regions *info; * struct drm_i915_query_item item = { * .query_id = DRM_I915_QUERY_MEMORY_REGIONS; * }; * struct drm_i915_query query = { * .num_items = 1, * .items_ptr = (uintptr_t)&item, * }; * int err, i; * * // First query the size of the blob we need, this needs to be large * // enough to hold our array of regions. The kernel will fill out the * // item.length for us, which is the number of bytes we need. * err = ioctl(fd, DRM_IOCTL_I915_QUERY, &query); * if (err) ... * * info = calloc(1, item.length); * // Now that we allocated the required number of bytes, we call the ioctl * // again, this time with the data_ptr pointing to our newly allocated * // blob, which the kernel can then populate with the all the region info. * item.data_ptr = (uintptr_t)&info, * * err = ioctl(fd, DRM_IOCTL_I915_QUERY, &query); * if (err) ... * * // We can now access each region in the array * for (i = 0; i < info->num_regions; i++) { * struct drm_i915_memory_region_info mr = info->regions[i]; * u16 class = mr.region.class; * u16 instance = mr.region.instance; * * .... * } * * free(info); */ struct drm_i915_query_memory_regions { /** @num_regions: Number of supported regions */ __u32 num_regions; /** @rsvd: MBZ */ __u32 rsvd[3]; /** @regions: Info about each supported region */ struct drm_i915_memory_region_info regions[]; }; /** * DOC: GuC HWCONFIG blob uAPI * * The GuC produces a blob with information about the current device. * i915 reads this blob from GuC and makes it available via this uAPI. * * The format and meaning of the blob content are documented in the * Programmer's Reference Manual. */ /** * struct drm_i915_gem_create_ext - Existing gem_create behaviour, with added * extension support using struct i915_user_extension. * * Note that new buffer flags should be added here, at least for the stuff that * is immutable. Previously we would have two ioctls, one to create the object * with gem_create, and another to apply various parameters, however this * creates some ambiguity for the params which are considered immutable. Also in * general we're phasing out the various SET/GET ioctls. */ struct drm_i915_gem_create_ext { /** * @size: Requested size for the object. * * The (page-aligned) allocated size for the object will be returned. * * On platforms like DG2/ATS the kernel will always use 64K or larger * pages for I915_MEMORY_CLASS_DEVICE. The kernel also requires a * minimum of 64K GTT alignment for such objects. * * NOTE: Previously the ABI here required a minimum GTT alignment of 2M * on DG2/ATS, due to how the hardware implemented 64K GTT page support, * where we had the following complications: * * 1) The entire PDE (which covers a 2MB virtual address range), must * contain only 64K PTEs, i.e mixing 4K and 64K PTEs in the same * PDE is forbidden by the hardware. * * 2) We still need to support 4K PTEs for I915_MEMORY_CLASS_SYSTEM * objects. * * However on actual production HW this was completely changed to now * allow setting a TLB hint at the PTE level (see PS64), which is a lot * more flexible than the above. With this the 2M restriction was * dropped where we now only require 64K. */ __u64 size; /** * @handle: Returned handle for the object. * * Object handles are nonzero. */ __u32 handle; /** * @flags: Optional flags. * * Supported values: * * I915_GEM_CREATE_EXT_FLAG_NEEDS_CPU_ACCESS - Signal to the kernel that * the object will need to be accessed via the CPU. * * Only valid when placing objects in I915_MEMORY_CLASS_DEVICE, and only * strictly required on configurations where some subset of the device * memory is directly visible/mappable through the CPU (which we also * call small BAR), like on some DG2+ systems. Note that this is quite * undesirable, but due to various factors like the client CPU, BIOS etc * it's something we can expect to see in the wild. See * &drm_i915_memory_region_info.probed_cpu_visible_size for how to * determine if this system applies. * * Note that one of the placements MUST be I915_MEMORY_CLASS_SYSTEM, to * ensure the kernel can always spill the allocation to system memory, * if the object can't be allocated in the mappable part of * I915_MEMORY_CLASS_DEVICE. * * Also note that since the kernel only supports flat-CCS on objects * that can *only* be placed in I915_MEMORY_CLASS_DEVICE, we therefore * don't support I915_GEM_CREATE_EXT_FLAG_NEEDS_CPU_ACCESS together with * flat-CCS. * * Without this hint, the kernel will assume that non-mappable * I915_MEMORY_CLASS_DEVICE is preferred for this object. Note that the * kernel can still migrate the object to the mappable part, as a last * resort, if userspace ever CPU faults this object, but this might be * expensive, and so ideally should be avoided. * * On older kernels which lack the relevant small-bar uAPI support (see * also &drm_i915_memory_region_info.probed_cpu_visible_size), * usage of the flag will result in an error, but it should NEVER be * possible to end up with a small BAR configuration, assuming we can * also successfully load the i915 kernel module. In such cases the * entire I915_MEMORY_CLASS_DEVICE region will be CPU accessible, and as * such there are zero restrictions on where the object can be placed. */ #define I915_GEM_CREATE_EXT_FLAG_NEEDS_CPU_ACCESS (1 << 0) __u32 flags; /** * @extensions: The chain of extensions to apply to this object. * * This will be useful in the future when we need to support several * different extensions, and we need to apply more than one when * creating the object. See struct i915_user_extension. * * If we don't supply any extensions then we get the same old gem_create * behaviour. * * For I915_GEM_CREATE_EXT_MEMORY_REGIONS usage see * struct drm_i915_gem_create_ext_memory_regions. * * For I915_GEM_CREATE_EXT_PROTECTED_CONTENT usage see * struct drm_i915_gem_create_ext_protected_content. */ #define I915_GEM_CREATE_EXT_MEMORY_REGIONS 0 #define I915_GEM_CREATE_EXT_PROTECTED_CONTENT 1 __u64 extensions; }; /** * struct drm_i915_gem_create_ext_memory_regions - The * I915_GEM_CREATE_EXT_MEMORY_REGIONS extension. * * Set the object with the desired set of placements/regions in priority * order. Each entry must be unique and supported by the device. * * This is provided as an array of struct drm_i915_gem_memory_class_instance, or * an equivalent layout of class:instance pair encodings. See struct * drm_i915_query_memory_regions and DRM_I915_QUERY_MEMORY_REGIONS for how to * query the supported regions for a device. * * As an example, on discrete devices, if we wish to set the placement as * device local-memory we can do something like: * * .. code-block:: C * * struct drm_i915_gem_memory_class_instance region_lmem = { * .memory_class = I915_MEMORY_CLASS_DEVICE, * .memory_instance = 0, * }; * struct drm_i915_gem_create_ext_memory_regions regions = { * .base = { .name = I915_GEM_CREATE_EXT_MEMORY_REGIONS }, * .regions = (uintptr_t)®ion_lmem, * .num_regions = 1, * }; * struct drm_i915_gem_create_ext create_ext = { * .size = 16 * PAGE_SIZE, * .extensions = (uintptr_t)®ions, * }; * * int err = ioctl(fd, DRM_IOCTL_I915_GEM_CREATE_EXT, &create_ext); * if (err) ... * * At which point we get the object handle in &drm_i915_gem_create_ext.handle, * along with the final object size in &drm_i915_gem_create_ext.size, which * should account for any rounding up, if required. * * Note that userspace has no means of knowing the current backing region * for objects where @num_regions is larger than one. The kernel will only * ensure that the priority order of the @regions array is honoured, either * when initially placing the object, or when moving memory around due to * memory pressure * * On Flat-CCS capable HW, compression is supported for the objects residing * in I915_MEMORY_CLASS_DEVICE. When such objects (compressed) have other * memory class in @regions and migrated (by i915, due to memory * constraints) to the non I915_MEMORY_CLASS_DEVICE region, then i915 needs to * decompress the content. But i915 doesn't have the required information to * decompress the userspace compressed objects. * * So i915 supports Flat-CCS, on the objects which can reside only on * I915_MEMORY_CLASS_DEVICE regions. */ struct drm_i915_gem_create_ext_memory_regions { /** @base: Extension link. See struct i915_user_extension. */ struct i915_user_extension base; /** @pad: MBZ */ __u32 pad; /** @num_regions: Number of elements in the @regions array. */ __u32 num_regions; /** * @regions: The regions/placements array. * * An array of struct drm_i915_gem_memory_class_instance. */ __u64 regions; }; /** * struct drm_i915_gem_create_ext_protected_content - The * I915_OBJECT_PARAM_PROTECTED_CONTENT extension. * * If this extension is provided, buffer contents are expected to be protected * by PXP encryption and require decryption for scan out and processing. This * is only possible on platforms that have PXP enabled, on all other scenarios * using this extension will cause the ioctl to fail and return -ENODEV. The * flags parameter is reserved for future expansion and must currently be set * to zero. * * The buffer contents are considered invalid after a PXP session teardown. * * The encryption is guaranteed to be processed correctly only if the object * is submitted with a context created using the * I915_CONTEXT_PARAM_PROTECTED_CONTENT flag. This will also enable extra checks * at submission time on the validity of the objects involved. * * Below is an example on how to create a protected object: * * .. code-block:: C * * struct drm_i915_gem_create_ext_protected_content protected_ext = { * .base = { .name = I915_GEM_CREATE_EXT_PROTECTED_CONTENT }, * .flags = 0, * }; * struct drm_i915_gem_create_ext create_ext = { * .size = PAGE_SIZE, * .extensions = (uintptr_t)&protected_ext, * }; * * int err = ioctl(fd, DRM_IOCTL_I915_GEM_CREATE_EXT, &create_ext); * if (err) ... */ struct drm_i915_gem_create_ext_protected_content { /** @base: Extension link. See struct i915_user_extension. */ struct i915_user_extension base; /** @flags: reserved for future usage, currently MBZ */ __u32 flags; }; /* ID of the protected content session managed by i915 when PXP is active */ #define I915_PROTECTED_CONTENT_DEFAULT_SESSION 0xf #if defined(__cplusplus) } #endif #endif /* _I915_DRM_H_ */