include/uapi/drm/msm_drm.h

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __MSM_DRM_H__
  19 #define __MSM_DRM_H__
  20
  21 #include "drm.h"
  22
  23 #if defined(__cplusplus)
  24 extern "C" {
  25 #endif
  26
  27 /* Please note that modifications to all structs defined here are
  28  * subject to backwards-compatibility constraints:
  29  *  1) Do not use pointers, use __u64 instead for 32 bit / 64 bit
  30  *     user/kernel compatibility
  31  *  2) Keep fields aligned to their size
  32  *  3) Because of how drm_ioctl() works, we can add new fields at
  33  *     the end of an ioctl if some care is taken: drm_ioctl() will
  34  *     zero out the new fields at the tail of the ioctl, so a zero
  35  *     value should have a backwards compatible meaning.  And for
  36  *     output params, userspace won't see the newly added output
  37  *     fields.. so that has to be somehow ok.
  38  */
  39
  40 #define MSM_PIPE_NONE        0x00
  41 #define MSM_PIPE_2D0         0x01
  42 #define MSM_PIPE_2D1         0x02
  43 #define MSM_PIPE_3D0         0x10
  44
  45 /* timeouts are specified in clock-monotonic absolute times (to simplify
  46  * restarting interrupted ioctls).  The following struct is logically the
  47  * same as 'struct timespec' but 32/64b ABI safe.
  48  */
  49 struct drm_msm_timespec {
  50         __s64 tv_sec;          /* seconds */
  51         __s64 tv_nsec;         /* nanoseconds */
  52 };
  53
  54 #define MSM_PARAM_GPU_ID     0x01
  55 #define MSM_PARAM_GMEM_SIZE  0x02
  56 #define MSM_PARAM_CHIP_ID    0x03
  57 #define MSM_PARAM_MAX_FREQ   0x04
  58 #define MSM_PARAM_TIMESTAMP  0x05
  59
  60 struct drm_msm_param {
  61         __u32 pipe;           /* in, MSM_PIPE_x */
  62         __u32 param;          /* in, MSM_PARAM_x */
  63         __u64 value;          /* out (get_param) or in (set_param) */
  64 };
  65
  66 /*
  67  * GEM buffers:
  68  */
  69
  70 #define MSM_BO_SCANOUT       0x00000001     /* scanout capable */
  71 #define MSM_BO_GPU_READONLY  0x00000002
  72 #define MSM_BO_CACHE_MASK    0x000f0000
  73 /* cache modes */
  74 #define MSM_BO_CACHED        0x00010000
  75 #define MSM_BO_WC            0x00020000
  76 #define MSM_BO_UNCACHED      0x00040000
  77
  78 #define MSM_BO_FLAGS         (MSM_BO_SCANOUT | \
  79                               MSM_BO_GPU_READONLY | \
  80                               MSM_BO_CACHED | \
  81                               MSM_BO_WC | \
  82                               MSM_BO_UNCACHED)
  83
  84 struct drm_msm_gem_new {
  85         __u64 size;           /* in */
  86         __u32 flags;          /* in, mask of MSM_BO_x */
  87         __u32 handle;         /* out */
  88 };
  89
  90 struct drm_msm_gem_info {
  91         __u32 handle;         /* in */
  92         __u32 pad;
  93         __u64 offset;         /* out, offset to pass to mmap() */
  94 };
  95
  96 #define MSM_PREP_READ        0x01
  97 #define MSM_PREP_WRITE       0x02
  98 #define MSM_PREP_NOSYNC      0x04
  99
 100 #define MSM_PREP_FLAGS       (MSM_PREP_READ | MSM_PREP_WRITE | MSM_PREP_NOSYNC)
 101
 102 struct drm_msm_gem_cpu_prep {
 103         __u32 handle;         /* in */
 104         __u32 op;             /* in, mask of MSM_PREP_x */
 105         struct drm_msm_timespec timeout;   /* in */
 106 };
 107
 108 struct drm_msm_gem_cpu_fini {
 109         __u32 handle;         /* in */
 110 };
 111
 112 /*
 113  * Cmdstream Submission:
 114  */
 115
 116 /* The value written into the cmdstream is logically:
 117  *
 118  *   ((relocbuf->gpuaddr + reloc_offset) << shift) | or
 119  *
 120  * When we have GPU's w/ >32bit ptrs, it should be possible to deal
 121  * with this by emit'ing two reloc entries with appropriate shift
 122  * values.  Or a new MSM_SUBMIT_CMD_x type would also be an option.
 123  *
 124  * NOTE that reloc's must be sorted by order of increasing submit_offset,
 125  * otherwise EINVAL.
 126  */
 127 struct drm_msm_gem_submit_reloc {
 128         __u32 submit_offset;  /* in, offset from submit_bo */
 129         __u32 or;             /* in, value OR'd with result */
 130         __s32 shift;          /* in, amount of left shift (can be negative) */
 131         __u32 reloc_idx;      /* in, index of reloc_bo buffer */
 132         __u64 reloc_offset;   /* in, offset from start of reloc_bo */
 133 };
 134
 135 /* submit-types:
 136  *   BUF - this cmd buffer is executed normally.
 137  *   IB_TARGET_BUF - this cmd buffer is an IB target.  Reloc's are
 138  *      processed normally, but the kernel does not setup an IB to
 139  *      this buffer in the first-level ringbuffer
 140  *   CTX_RESTORE_BUF - only executed if there has been a GPU context
 141  *      switch since the last SUBMIT ioctl
 142  */
 143 #define MSM_SUBMIT_CMD_BUF             0x0001
 144 #define MSM_SUBMIT_CMD_IB_TARGET_BUF   0x0002
 145 #define MSM_SUBMIT_CMD_CTX_RESTORE_BUF 0x0003
 146 struct drm_msm_gem_submit_cmd {
 147         __u32 type;           /* in, one of MSM_SUBMIT_CMD_x */
 148         __u32 submit_idx;     /* in, index of submit_bo cmdstream buffer */
 149         __u32 submit_offset;  /* in, offset into submit_bo */
 150         __u32 size;           /* in, cmdstream size */
 151         __u32 pad;
 152         __u32 nr_relocs;      /* in, number of submit_reloc's */
 153         __u64 __user relocs;  /* in, ptr to array of submit_reloc's */
 154 };
 155
 156 /* Each buffer referenced elsewhere in the cmdstream submit (ie. the
 157  * cmdstream buffer(s) themselves or reloc entries) has one (and only
 158  * one) entry in the submit->bos[] table.
 159  *
 160  * As a optimization, the current buffer (gpu virtual address) can be
 161  * passed back through the 'presumed' field.  If on a subsequent reloc,
 162  * userspace passes back a 'presumed' address that is still valid,
 163  * then patching the cmdstream for this entry is skipped.  This can
 164  * avoid kernel needing to map/access the cmdstream bo in the common
 165  * case.
 166  */
 167 #define MSM_SUBMIT_BO_READ             0x0001
 168 #define MSM_SUBMIT_BO_WRITE            0x0002
 169
 170 #define MSM_SUBMIT_BO_FLAGS            (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
 171
 172 struct drm_msm_gem_submit_bo {
 173         __u32 flags;          /* in, mask of MSM_SUBMIT_BO_x */
 174         __u32 handle;         /* in, GEM handle */
 175         __u64 presumed;       /* in/out, presumed buffer address */
 176 };
 177
 178 /* Each cmdstream submit consists of a table of buffers involved, and
 179  * one or more cmdstream buffers.  This allows for conditional execution
 180  * (context-restore), and IB buffers needed for per tile/bin draw cmds.
 181  */
 182 struct drm_msm_gem_submit {
 183         __u32 pipe;           /* in, MSM_PIPE_x */
 184         __u32 fence;          /* out */
 185         __u32 nr_bos;         /* in, number of submit_bo's */
 186         __u32 nr_cmds;        /* in, number of submit_cmd's */
 187         __u64 __user bos;     /* in, ptr to array of submit_bo's */
 188         __u64 __user cmds;    /* in, ptr to array of submit_cmd's */
 189 };
 190
 191 /* The normal way to synchronize with the GPU is just to CPU_PREP on
 192  * a buffer if you need to access it from the CPU (other cmdstream
 193  * submission from same or other contexts, PAGE_FLIP ioctl, etc, all
 194  * handle the required synchronization under the hood).  This ioctl
 195  * mainly just exists as a way to implement the gallium pipe_fence
 196  * APIs without requiring a dummy bo to synchronize on.
 197  */
 198 struct drm_msm_wait_fence {
 199         __u32 fence;          /* in */
 200         __u32 pad;
 201         struct drm_msm_timespec timeout;   /* in */
 202 };
 203
 204 /* madvise provides a way to tell the kernel in case a buffers contents
 205  * can be discarded under memory pressure, which is useful for userspace
 206  * bo cache where we want to optimistically hold on to buffer allocate
 207  * and potential mmap, but allow the pages to be discarded under memory
 208  * pressure.
 209  *
 210  * Typical usage would involve madvise(DONTNEED) when buffer enters BO
 211  * cache, and madvise(WILLNEED) if trying to recycle buffer from BO cache.
 212  * In the WILLNEED case, 'retained' indicates to userspace whether the
 213  * backing pages still exist.
 214  */
 215 #define MSM_MADV_WILLNEED 0       /* backing pages are needed, status returned in 'retained' */
 216 #define MSM_MADV_DONTNEED 1       /* backing pages not needed */
 217 #define __MSM_MADV_PURGED 2       /* internal state */
 218
 219 struct drm_msm_gem_madvise {
 220         __u32 handle;         /* in, GEM handle */
 221         __u32 madv;           /* in, MSM_MADV_x */
 222         __u32 retained;       /* out, whether backing store still exists */
 223 };
 224
 225 #define DRM_MSM_GET_PARAM              0x00
 226 /* placeholder:
 227 #define DRM_MSM_SET_PARAM              0x01
 228  */
 229 #define DRM_MSM_GEM_NEW                0x02
 230 #define DRM_MSM_GEM_INFO               0x03
 231 #define DRM_MSM_GEM_CPU_PREP           0x04
 232 #define DRM_MSM_GEM_CPU_FINI           0x05
 233 #define DRM_MSM_GEM_SUBMIT             0x06
 234 #define DRM_MSM_WAIT_FENCE             0x07
 235 #define DRM_MSM_GEM_MADVISE            0x08
 236 #define DRM_MSM_NUM_IOCTLS             0x09
 237
 238 #define DRM_IOCTL_MSM_GET_PARAM        DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GET_PARAM, struct drm_msm_param)
 239 #define DRM_IOCTL_MSM_GEM_NEW          DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_NEW, struct drm_msm_gem_new)
 240 #define DRM_IOCTL_MSM_GEM_INFO         DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_INFO, struct drm_msm_gem_info)
 241 #define DRM_IOCTL_MSM_GEM_CPU_PREP     DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_GEM_CPU_PREP, struct drm_msm_gem_cpu_prep)
 242 #define DRM_IOCTL_MSM_GEM_CPU_FINI     DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_GEM_CPU_FINI, struct drm_msm_gem_cpu_fini)
 243 #define DRM_IOCTL_MSM_GEM_SUBMIT       DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_SUBMIT, struct drm_msm_gem_submit)
 244 #define DRM_IOCTL_MSM_WAIT_FENCE       DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_WAIT_FENCE, struct drm_msm_wait_fence)
 245 #define DRM_IOCTL_MSM_GEM_MADVISE      DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_MADVISE, struct drm_msm_gem_madvise)
 246
 247 #if defined(__cplusplus)
 248 }
 249 #endif
 250
 251 #endif /* __MSM_DRM_H__ */