[PATCH 4/6] drm/msm: add a3xx gpu support

[Dave Airlie]

> diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
> new file mode 100644
> index 0000000..a586fbd
> --- /dev/null
> +++ b/include/uapi/drm/msm_drm.h
> @@ -0,0 +1,198 @@
> +/*
> + * Copyright (C) 2013 Red Hat
> + * Author: Rob Clark <robdclark at gmail.com>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published by
> + * the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program.  If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#ifndef __MSM_DRM_H__
> +#define __MSM_DRM_H__
> +
> +#include <stddef.h>
> +#include <drm/drm.h>
> +
> +/* Please note that modifications to all structs defined here are
> + * subject to backwards-compatibility constraints:
> + *  1) Do not use pointers, use uint64_t instead for 32 bit / 64 bit
> + *     user/kernel compatibility
> + *  2) Keep fields aligned to their size
> + *  3) Because of how drm_ioctl() works, we can add new fields at
> + *     the end of an ioctl if some care is taken: drm_ioctl() will
> + *     zero out the new fields at the tail of the ioctl, so a zero
> + *     value should have a backwards compatible meaning.  And for
> + *     output params, userspace won't see the newly added output
> + *     fields.. so that has to be somehow ok.
> + */
> +
> +#define MSM_PIPE_NONE        0x00
> +#define MSM_PIPE_2D0         0x01
> +#define MSM_PIPE_2D1         0x02
> +#define MSM_PIPE_3D0         0x10
> +
> +#define MSM_PARAM_GPU_ID     0x01
> +#define MSM_PARAM_GMEM_SIZE  0x02
> +
> +struct drm_msm_param {
> +       uint32_t pipe;           /* in, MSM_PIPE_x */
> +       uint32_t param;          /* in, MSM_PARAM_x */
> +       uint64_t value;          /* out (get_param) or in (set_param) */
> +};
> +
> +/*
> + * GEM buffers:
> + */
> +
> +// TODO: might eventually want some more usage hints (like RENDER_TARGET,
> +// etc) to give some hint about initial placement (DDR, SMI, etc..)
> +#define MSM_BO_SCANOUT       0x00000001     /* scanout capable */
> +#define MSM_BO_GPU_READONLY  0x00000002
> +#define MSM_BO_CACHE_MASK    0x000f0000
> +/* cache modes */
> +#define MSM_BO_CACHED        0x00010000
> +#define MSM_BO_WC            0x00020000
> +#define MSM_BO_UNCACHED      0x00040000
> +
> +struct drm_msm_gem_new {
> +       uint64_t size;           /* in */
> +       uint32_t flags;          /* in, mask of MSM_BO_x */
> +       uint32_t handle;         /* out */
> +};
> +
> +struct drm_msm_gem_info {
> +       uint32_t handle;         /* in */
> +       uint32_t pad;
> +       uint64_t offset;         /* out, offset to pass to mmap() */
> +};
> +
> +#define MSM_PREP_READ        0x01
> +#define MSM_PREP_WRITE       0x02
> +#define MSM_PREP_NOSYNC      0x04
> +
> +struct drm_msm_gem_cpu_prep {
> +       uint32_t handle;         /* in */
> +       uint32_t op;             /* in, mask of MSM_PREP_x */
> +       struct timespec timeout; /* in, timeout (clock_monotonic abs time) */

this scares me, don't do this from what I can see, and the fact I have
to check to confirm it this ends up using a long, which changes size
on 32/64 bit.

Dave.