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With softpin we allow the userspace to take control over the GPU virtual address space. The new capability is relected by a bump of the minor DRM version. There are a few restrictions for userspace to take into account: 1. The kernel reserves a bit of the address space to implement zero page faulting and mapping of the kernel internal ring buffer. Userspace can query the kernel for the first usable GPU VM address via ETNAVIV_PARAM_SOFTPIN_START_ADDR. 2. We only allow softpin on GPUs, which implement proper process separation via PPAS. If softpin is not available the softpin start address will be set to ~0. 3. Softpin is all or nothing. A submit using softpin must not use any address fixups via relocs. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Guido Günther <agx@sigxcpu.org>
298 lines
12 KiB
C
298 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Copyright (C) 2015 Etnaviv Project
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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 __ETNAVIV_DRM_H__
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#define __ETNAVIV_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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/* 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_etnaviv_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 ETNAVIV_PARAM_GPU_MODEL 0x01
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#define ETNAVIV_PARAM_GPU_REVISION 0x02
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#define ETNAVIV_PARAM_GPU_FEATURES_0 0x03
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#define ETNAVIV_PARAM_GPU_FEATURES_1 0x04
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#define ETNAVIV_PARAM_GPU_FEATURES_2 0x05
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#define ETNAVIV_PARAM_GPU_FEATURES_3 0x06
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#define ETNAVIV_PARAM_GPU_FEATURES_4 0x07
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#define ETNAVIV_PARAM_GPU_FEATURES_5 0x08
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#define ETNAVIV_PARAM_GPU_FEATURES_6 0x09
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#define ETNAVIV_PARAM_GPU_FEATURES_7 0x0a
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#define ETNAVIV_PARAM_GPU_FEATURES_8 0x0b
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#define ETNAVIV_PARAM_GPU_FEATURES_9 0x0c
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#define ETNAVIV_PARAM_GPU_FEATURES_10 0x0d
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#define ETNAVIV_PARAM_GPU_FEATURES_11 0x0e
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#define ETNAVIV_PARAM_GPU_FEATURES_12 0x0f
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#define ETNAVIV_PARAM_GPU_STREAM_COUNT 0x10
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#define ETNAVIV_PARAM_GPU_REGISTER_MAX 0x11
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#define ETNAVIV_PARAM_GPU_THREAD_COUNT 0x12
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#define ETNAVIV_PARAM_GPU_VERTEX_CACHE_SIZE 0x13
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#define ETNAVIV_PARAM_GPU_SHADER_CORE_COUNT 0x14
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#define ETNAVIV_PARAM_GPU_PIXEL_PIPES 0x15
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#define ETNAVIV_PARAM_GPU_VERTEX_OUTPUT_BUFFER_SIZE 0x16
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#define ETNAVIV_PARAM_GPU_BUFFER_SIZE 0x17
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#define ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT 0x18
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#define ETNAVIV_PARAM_GPU_NUM_CONSTANTS 0x19
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#define ETNAVIV_PARAM_GPU_NUM_VARYINGS 0x1a
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#define ETNAVIV_PARAM_SOFTPIN_START_ADDR 0x1b
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#define ETNA_MAX_PIPES 4
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struct drm_etnaviv_param {
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__u32 pipe; /* in */
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__u32 param; /* in, ETNAVIV_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 ETNA_BO_CACHE_MASK 0x000f0000
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/* cache modes */
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#define ETNA_BO_CACHED 0x00010000
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#define ETNA_BO_WC 0x00020000
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#define ETNA_BO_UNCACHED 0x00040000
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/* map flags */
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#define ETNA_BO_FORCE_MMU 0x00100000
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struct drm_etnaviv_gem_new {
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__u64 size; /* in */
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__u32 flags; /* in, mask of ETNA_BO_x */
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__u32 handle; /* out */
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};
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struct drm_etnaviv_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 ETNA_PREP_READ 0x01
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#define ETNA_PREP_WRITE 0x02
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#define ETNA_PREP_NOSYNC 0x04
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struct drm_etnaviv_gem_cpu_prep {
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__u32 handle; /* in */
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__u32 op; /* in, mask of ETNA_PREP_x */
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struct drm_etnaviv_timespec timeout; /* in */
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};
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struct drm_etnaviv_gem_cpu_fini {
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__u32 handle; /* in */
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__u32 flags; /* in, placeholder for now, no defined values */
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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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* relocbuf->gpuaddr + reloc_offset
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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_etnaviv_gem_submit_reloc {
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__u32 submit_offset; /* in, offset from submit_bo */
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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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__u32 flags; /* in, placeholder for now, no defined values */
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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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* If the submit is a softpin submit (ETNA_SUBMIT_SOFTPIN) the 'presumed'
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* field is interpreted as the fixed location to map the bo into the gpu
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* virtual address space. If the kernel is unable to map the buffer at
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* this location the submit will fail. This means userspace is responsible
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* for the whole gpu virtual address management.
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*/
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#define ETNA_SUBMIT_BO_READ 0x0001
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#define ETNA_SUBMIT_BO_WRITE 0x0002
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struct drm_etnaviv_gem_submit_bo {
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__u32 flags; /* in, mask of ETNA_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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/* performance monitor request (pmr) */
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#define ETNA_PM_PROCESS_PRE 0x0001
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#define ETNA_PM_PROCESS_POST 0x0002
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struct drm_etnaviv_gem_submit_pmr {
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__u32 flags; /* in, when to process request (ETNA_PM_PROCESS_x) */
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__u8 domain; /* in, pm domain */
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__u8 pad;
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__u16 signal; /* in, pm signal */
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__u32 sequence; /* in, sequence number */
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__u32 read_offset; /* in, offset from read_bo */
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__u32 read_idx; /* in, index of read_bo buffer */
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};
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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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#define ETNA_SUBMIT_NO_IMPLICIT 0x0001
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#define ETNA_SUBMIT_FENCE_FD_IN 0x0002
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#define ETNA_SUBMIT_FENCE_FD_OUT 0x0004
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#define ETNA_SUBMIT_SOFTPIN 0x0008
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#define ETNA_SUBMIT_FLAGS (ETNA_SUBMIT_NO_IMPLICIT | \
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ETNA_SUBMIT_FENCE_FD_IN | \
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ETNA_SUBMIT_FENCE_FD_OUT| \
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ETNA_SUBMIT_SOFTPIN)
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#define ETNA_PIPE_3D 0x00
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#define ETNA_PIPE_2D 0x01
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#define ETNA_PIPE_VG 0x02
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struct drm_etnaviv_gem_submit {
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__u32 fence; /* out */
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__u32 pipe; /* in */
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__u32 exec_state; /* in, initial execution state (ETNA_PIPE_x) */
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__u32 nr_bos; /* in, number of submit_bo's */
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__u32 nr_relocs; /* in, number of submit_reloc's */
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__u32 stream_size; /* in, cmdstream size */
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__u64 bos; /* in, ptr to array of submit_bo's */
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__u64 relocs; /* in, ptr to array of submit_reloc's */
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__u64 stream; /* in, ptr to cmdstream */
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__u32 flags; /* in, mask of ETNA_SUBMIT_x */
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__s32 fence_fd; /* in/out, fence fd (see ETNA_SUBMIT_FENCE_FD_x) */
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__u64 pmrs; /* in, ptr to array of submit_pmr's */
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__u32 nr_pmrs; /* in, number of submit_pmr's */
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__u32 pad;
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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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#define ETNA_WAIT_NONBLOCK 0x01
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struct drm_etnaviv_wait_fence {
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__u32 pipe; /* in */
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__u32 fence; /* in */
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__u32 flags; /* in, mask of ETNA_WAIT_x */
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__u32 pad;
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struct drm_etnaviv_timespec timeout; /* in */
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};
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#define ETNA_USERPTR_READ 0x01
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#define ETNA_USERPTR_WRITE 0x02
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struct drm_etnaviv_gem_userptr {
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__u64 user_ptr; /* in, page aligned user pointer */
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__u64 user_size; /* in, page aligned user size */
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__u32 flags; /* in, flags */
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__u32 handle; /* out, non-zero handle */
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};
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struct drm_etnaviv_gem_wait {
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__u32 pipe; /* in */
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__u32 handle; /* in, bo to be waited for */
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__u32 flags; /* in, mask of ETNA_WAIT_x */
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__u32 pad;
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struct drm_etnaviv_timespec timeout; /* in */
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};
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/*
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* Performance Monitor (PM):
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*/
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struct drm_etnaviv_pm_domain {
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__u32 pipe; /* in */
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__u8 iter; /* in/out, select pm domain at index iter */
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__u8 id; /* out, id of domain */
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__u16 nr_signals; /* out, how many signals does this domain provide */
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char name[64]; /* out, name of domain */
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};
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struct drm_etnaviv_pm_signal {
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__u32 pipe; /* in */
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__u8 domain; /* in, pm domain index */
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__u8 pad;
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__u16 iter; /* in/out, select pm source at index iter */
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__u16 id; /* out, id of signal */
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char name[64]; /* out, name of domain */
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};
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#define DRM_ETNAVIV_GET_PARAM 0x00
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/* placeholder:
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#define DRM_ETNAVIV_SET_PARAM 0x01
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*/
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#define DRM_ETNAVIV_GEM_NEW 0x02
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#define DRM_ETNAVIV_GEM_INFO 0x03
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#define DRM_ETNAVIV_GEM_CPU_PREP 0x04
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#define DRM_ETNAVIV_GEM_CPU_FINI 0x05
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#define DRM_ETNAVIV_GEM_SUBMIT 0x06
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#define DRM_ETNAVIV_WAIT_FENCE 0x07
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#define DRM_ETNAVIV_GEM_USERPTR 0x08
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#define DRM_ETNAVIV_GEM_WAIT 0x09
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#define DRM_ETNAVIV_PM_QUERY_DOM 0x0a
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#define DRM_ETNAVIV_PM_QUERY_SIG 0x0b
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#define DRM_ETNAVIV_NUM_IOCTLS 0x0c
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#define DRM_IOCTL_ETNAVIV_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_GET_PARAM, struct drm_etnaviv_param)
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#define DRM_IOCTL_ETNAVIV_GEM_NEW DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_NEW, struct drm_etnaviv_gem_new)
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#define DRM_IOCTL_ETNAVIV_GEM_INFO DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_INFO, struct drm_etnaviv_gem_info)
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#define DRM_IOCTL_ETNAVIV_GEM_CPU_PREP DRM_IOW(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_CPU_PREP, struct drm_etnaviv_gem_cpu_prep)
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#define DRM_IOCTL_ETNAVIV_GEM_CPU_FINI DRM_IOW(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_CPU_FINI, struct drm_etnaviv_gem_cpu_fini)
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#define DRM_IOCTL_ETNAVIV_GEM_SUBMIT DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_SUBMIT, struct drm_etnaviv_gem_submit)
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#define DRM_IOCTL_ETNAVIV_WAIT_FENCE DRM_IOW(DRM_COMMAND_BASE + DRM_ETNAVIV_WAIT_FENCE, struct drm_etnaviv_wait_fence)
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#define DRM_IOCTL_ETNAVIV_GEM_USERPTR DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_USERPTR, struct drm_etnaviv_gem_userptr)
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#define DRM_IOCTL_ETNAVIV_GEM_WAIT DRM_IOW(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_WAIT, struct drm_etnaviv_gem_wait)
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#define DRM_IOCTL_ETNAVIV_PM_QUERY_DOM DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_PM_QUERY_DOM, struct drm_etnaviv_pm_domain)
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#define DRM_IOCTL_ETNAVIV_PM_QUERY_SIG DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_PM_QUERY_SIG, struct drm_etnaviv_pm_signal)
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ETNAVIV_DRM_H__ */
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