272 lines
10 KiB
C
272 lines
10 KiB
C
/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MSM_DRM_H__
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#define __MSM_DRM_H__
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#include "drm.h"
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Please note that modifications to all structs defined here are
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* subject to backwards-compatibility constraints:
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* 1) Do not use pointers, use __u64 instead for 32 bit / 64 bit
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* user/kernel compatibility
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* 2) Keep fields aligned to their size
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* 3) Because of how drm_ioctl() works, we can add new fields at
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* the end of an ioctl if some care is taken: drm_ioctl() will
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* zero out the new fields at the tail of the ioctl, so a zero
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* value should have a backwards compatible meaning. And for
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* output params, userspace won't see the newly added output
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* fields.. so that has to be somehow ok.
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*/
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#define MSM_PIPE_NONE 0x00
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#define MSM_PIPE_2D0 0x01
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#define MSM_PIPE_2D1 0x02
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#define MSM_PIPE_3D0 0x10
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/* The pipe-id just uses the lower bits, so can be OR'd with flags in
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* the upper 16 bits (which could be extended further, if needed, maybe
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* we extend/overload the pipe-id some day to deal with multiple rings,
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* but even then I don't think we need the full lower 16 bits).
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*/
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#define MSM_PIPE_ID_MASK 0xffff
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#define MSM_PIPE_ID(x) ((x) & MSM_PIPE_ID_MASK)
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#define MSM_PIPE_FLAGS(x) ((x) & ~MSM_PIPE_ID_MASK)
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/* timeouts are specified in clock-monotonic absolute times (to simplify
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* restarting interrupted ioctls). The following struct is logically the
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* same as 'struct timespec' but 32/64b ABI safe.
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*/
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struct drm_msm_timespec {
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__s64 tv_sec; /* seconds */
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__s64 tv_nsec; /* nanoseconds */
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};
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#define MSM_PARAM_GPU_ID 0x01
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#define MSM_PARAM_GMEM_SIZE 0x02
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#define MSM_PARAM_CHIP_ID 0x03
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#define MSM_PARAM_MAX_FREQ 0x04
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#define MSM_PARAM_TIMESTAMP 0x05
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struct drm_msm_param {
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__u32 pipe; /* in, MSM_PIPE_x */
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__u32 param; /* in, MSM_PARAM_x */
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__u64 value; /* out (get_param) or in (set_param) */
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};
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/*
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* GEM buffers:
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*/
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#define MSM_BO_SCANOUT 0x00000001 /* scanout capable */
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#define MSM_BO_GPU_READONLY 0x00000002
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#define MSM_BO_CACHE_MASK 0x000f0000
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/* cache modes */
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#define MSM_BO_CACHED 0x00010000
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#define MSM_BO_WC 0x00020000
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#define MSM_BO_UNCACHED 0x00040000
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#define MSM_BO_FLAGS (MSM_BO_SCANOUT | \
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MSM_BO_GPU_READONLY | \
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MSM_BO_CACHED | \
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MSM_BO_WC | \
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MSM_BO_UNCACHED)
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struct drm_msm_gem_new {
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__u64 size; /* in */
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__u32 flags; /* in, mask of MSM_BO_x */
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__u32 handle; /* out */
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};
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struct drm_msm_gem_info {
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__u32 handle; /* in */
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__u32 pad;
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__u64 offset; /* out, offset to pass to mmap() */
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};
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#define MSM_PREP_READ 0x01
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#define MSM_PREP_WRITE 0x02
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#define MSM_PREP_NOSYNC 0x04
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#define MSM_PREP_FLAGS (MSM_PREP_READ | MSM_PREP_WRITE | MSM_PREP_NOSYNC)
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struct drm_msm_gem_cpu_prep {
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__u32 handle; /* in */
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__u32 op; /* in, mask of MSM_PREP_x */
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struct drm_msm_timespec timeout; /* in */
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};
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struct drm_msm_gem_cpu_fini {
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__u32 handle; /* in */
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};
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/*
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* Cmdstream Submission:
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*/
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/* The value written into the cmdstream is logically:
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*
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* ((relocbuf->gpuaddr + reloc_offset) << shift) | or
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*
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* When we have GPU's w/ >32bit ptrs, it should be possible to deal
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* with this by emit'ing two reloc entries with appropriate shift
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* values. Or a new MSM_SUBMIT_CMD_x type would also be an option.
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*
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* NOTE that reloc's must be sorted by order of increasing submit_offset,
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* otherwise EINVAL.
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*/
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struct drm_msm_gem_submit_reloc {
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__u32 submit_offset; /* in, offset from submit_bo */
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__u32 or; /* in, value OR'd with result */
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__s32 shift; /* in, amount of left shift (can be negative) */
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__u32 reloc_idx; /* in, index of reloc_bo buffer */
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__u64 reloc_offset; /* in, offset from start of reloc_bo */
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};
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/* submit-types:
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* BUF - this cmd buffer is executed normally.
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* IB_TARGET_BUF - this cmd buffer is an IB target. Reloc's are
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* processed normally, but the kernel does not setup an IB to
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* this buffer in the first-level ringbuffer
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* CTX_RESTORE_BUF - only executed if there has been a GPU context
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* switch since the last SUBMIT ioctl
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*/
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#define MSM_SUBMIT_CMD_BUF 0x0001
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#define MSM_SUBMIT_CMD_IB_TARGET_BUF 0x0002
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#define MSM_SUBMIT_CMD_CTX_RESTORE_BUF 0x0003
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struct drm_msm_gem_submit_cmd {
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__u32 type; /* in, one of MSM_SUBMIT_CMD_x */
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__u32 submit_idx; /* in, index of submit_bo cmdstream buffer */
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__u32 submit_offset; /* in, offset into submit_bo */
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__u32 size; /* in, cmdstream size */
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__u32 pad;
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__u32 nr_relocs; /* in, number of submit_reloc's */
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__u64 __user relocs; /* in, ptr to array of submit_reloc's */
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};
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/* Each buffer referenced elsewhere in the cmdstream submit (ie. the
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* cmdstream buffer(s) themselves or reloc entries) has one (and only
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* one) entry in the submit->bos[] table.
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*
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* As a optimization, the current buffer (gpu virtual address) can be
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* passed back through the 'presumed' field. If on a subsequent reloc,
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* userspace passes back a 'presumed' address that is still valid,
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* then patching the cmdstream for this entry is skipped. This can
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* avoid kernel needing to map/access the cmdstream bo in the common
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* case.
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*/
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#define MSM_SUBMIT_BO_READ 0x0001
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#define MSM_SUBMIT_BO_WRITE 0x0002
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#define MSM_SUBMIT_BO_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
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struct drm_msm_gem_submit_bo {
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__u32 flags; /* in, mask of MSM_SUBMIT_BO_x */
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__u32 handle; /* in, GEM handle */
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__u64 presumed; /* in/out, presumed buffer address */
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};
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/* Valid submit ioctl flags: */
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#define MSM_SUBMIT_NO_IMPLICIT 0x80000000 /* disable implicit sync */
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#define MSM_SUBMIT_FENCE_FD_IN 0x40000000 /* enable input fence_fd */
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#define MSM_SUBMIT_FENCE_FD_OUT 0x20000000 /* enable output fence_fd */
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#define MSM_SUBMIT_FLAGS ( \
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MSM_SUBMIT_NO_IMPLICIT | \
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MSM_SUBMIT_FENCE_FD_IN | \
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MSM_SUBMIT_FENCE_FD_OUT | \
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0)
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/* Each cmdstream submit consists of a table of buffers involved, and
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* one or more cmdstream buffers. This allows for conditional execution
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* (context-restore), and IB buffers needed for per tile/bin draw cmds.
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*/
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struct drm_msm_gem_submit {
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__u32 flags; /* MSM_PIPE_x | MSM_SUBMIT_x */
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__u32 fence; /* out */
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__u32 nr_bos; /* in, number of submit_bo's */
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__u32 nr_cmds; /* in, number of submit_cmd's */
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__u64 __user bos; /* in, ptr to array of submit_bo's */
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__u64 __user cmds; /* in, ptr to array of submit_cmd's */
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__s32 fence_fd; /* in/out fence fd (see MSM_SUBMIT_FENCE_FD_IN/OUT) */
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};
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/* The normal way to synchronize with the GPU is just to CPU_PREP on
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* a buffer if you need to access it from the CPU (other cmdstream
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* submission from same or other contexts, PAGE_FLIP ioctl, etc, all
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* handle the required synchronization under the hood). This ioctl
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* mainly just exists as a way to implement the gallium pipe_fence
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* APIs without requiring a dummy bo to synchronize on.
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*/
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struct drm_msm_wait_fence {
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__u32 fence; /* in */
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__u32 pad;
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struct drm_msm_timespec timeout; /* in */
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};
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/* madvise provides a way to tell the kernel in case a buffers contents
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* can be discarded under memory pressure, which is useful for userspace
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* bo cache where we want to optimistically hold on to buffer allocate
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* and potential mmap, but allow the pages to be discarded under memory
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* pressure.
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*
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* Typical usage would involve madvise(DONTNEED) when buffer enters BO
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* cache, and madvise(WILLNEED) if trying to recycle buffer from BO cache.
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* In the WILLNEED case, 'retained' indicates to userspace whether the
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* backing pages still exist.
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*/
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#define MSM_MADV_WILLNEED 0 /* backing pages are needed, status returned in 'retained' */
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#define MSM_MADV_DONTNEED 1 /* backing pages not needed */
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#define __MSM_MADV_PURGED 2 /* internal state */
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struct drm_msm_gem_madvise {
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__u32 handle; /* in, GEM handle */
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__u32 madv; /* in, MSM_MADV_x */
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__u32 retained; /* out, whether backing store still exists */
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};
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#define DRM_MSM_GET_PARAM 0x00
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/* placeholder:
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#define DRM_MSM_SET_PARAM 0x01
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*/
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#define DRM_MSM_GEM_NEW 0x02
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#define DRM_MSM_GEM_INFO 0x03
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#define DRM_MSM_GEM_CPU_PREP 0x04
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#define DRM_MSM_GEM_CPU_FINI 0x05
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#define DRM_MSM_GEM_SUBMIT 0x06
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#define DRM_MSM_WAIT_FENCE 0x07
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#define DRM_MSM_GEM_MADVISE 0x08
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#define DRM_MSM_NUM_IOCTLS 0x09
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#define DRM_IOCTL_MSM_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GET_PARAM, struct drm_msm_param)
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#define DRM_IOCTL_MSM_GEM_NEW DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_NEW, struct drm_msm_gem_new)
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#define DRM_IOCTL_MSM_GEM_INFO DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_INFO, struct drm_msm_gem_info)
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#define DRM_IOCTL_MSM_GEM_CPU_PREP DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_GEM_CPU_PREP, struct drm_msm_gem_cpu_prep)
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#define DRM_IOCTL_MSM_GEM_CPU_FINI DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_GEM_CPU_FINI, struct drm_msm_gem_cpu_fini)
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#define DRM_IOCTL_MSM_GEM_SUBMIT DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_SUBMIT, struct drm_msm_gem_submit)
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#define DRM_IOCTL_MSM_WAIT_FENCE DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_WAIT_FENCE, struct drm_msm_wait_fence)
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#define DRM_IOCTL_MSM_GEM_MADVISE DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_MADVISE, struct drm_msm_gem_madvise)
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __MSM_DRM_H__ */
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