path: root/src/gallium/drivers/r300/r300_transfer.c

/*
 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
 * Copyright 2010 Marek Olšák <maraeo@gmail.com>
 *
 * 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
 * on 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
 * THE AUTHOR(S) AND/OR THEIR 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. */

#include "r300_context.h"
#include "r300_transfer.h"
#include "r300_texture.h"
#include "r300_screen.h"

#include "r300_winsys.h"

#include "util/u_memory.h"
#include "util/u_format.h"

struct r300_transfer {
    /* Parent class */
    struct pipe_transfer transfer;

    /* Pipe context. */
    struct pipe_context *ctx;

    /* Offset from start of buffer. */
    unsigned offset;

    /* Detiled texture. */
    struct r300_texture *detiled_texture;

    /* Transfer and format flags. */
    unsigned render_target_usage;
};

/* Convenience cast wrapper. */
static INLINE struct r300_transfer*
r300_transfer(struct pipe_transfer* transfer)
{
    return (struct r300_transfer*)transfer;
}

/* Copy from a tiled texture to a detiled one. */
static void r300_copy_from_tiled_texture(struct pipe_context *ctx,
                                         struct r300_transfer *r300transfer)
{
    struct pipe_screen *screen = ctx->screen;
    struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
    struct pipe_resource *tex = transfer->resource;
    struct pipe_surface *src, *dst;

    src = screen->get_tex_surface(screen, tex,
				  transfer->sr.face,
                                  transfer->sr.level,
				  transfer->box.z,
                                  PIPE_BUFFER_USAGE_GPU_READ |
                                  PIPE_BUFFER_USAGE_PIXEL);

    dst = screen->get_tex_surface(screen, &r300transfer->detiled_texture->b.b,
                                  0, 0, 0,
                                  PIPE_BUFFER_USAGE_GPU_WRITE |
                                  PIPE_BUFFER_USAGE_PIXEL);

    ctx->surface_copy(ctx, dst, 0, 0, src, 
		      transfer->box.x, transfer->box.y,
                      transfer->box.width, transfer->box.height);

    pipe_surface_reference(&src, NULL);
    pipe_surface_reference(&dst, NULL);
}

/* Copy a detiled texture to a tiled one. */
static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
                                         struct r300_transfer *r300transfer)
{
    struct pipe_screen *screen = ctx->screen;
    struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
    struct pipe_resource *tex = transfer->resource;
    struct pipe_surface *src, *dst;

    src = screen->get_tex_surface(screen, &r300transfer->detiled_texture->b.b,
                                  0, 0, 0,
                                  PIPE_BUFFER_USAGE_GPU_READ |
                                  PIPE_BUFFER_USAGE_PIXEL);

    dst = screen->get_tex_surface(screen, tex,
				  transfer->sr.face,
                                  transfer->sr.level,
				  transfer->box.z,
                                  PIPE_BUFFER_USAGE_GPU_WRITE |
                                  PIPE_BUFFER_USAGE_PIXEL);

    /* XXX this flush prevents the following DRM error from occuring:
     * [drm:radeon_cs_ioctl] *ERROR* Failed to parse relocation !
     * Reproducible with perf/copytex. */
    ctx->flush(ctx, 0, NULL);

    ctx->surface_copy(ctx, dst,
		      transfer->box.x, transfer->box.y,
		      src, 0, 0,
                      transfer->box.width, transfer->box.height);

    /* XXX this flush fixes a few piglit tests (e.g. glean/pixelFormats). */
    ctx->flush(ctx, 0, NULL);

    pipe_surface_reference(&src, NULL);
    pipe_surface_reference(&dst, NULL);
}

struct pipe_transfer*
r300_texture_get_transfer(struct pipe_context *ctx,
			  struct pipe_resource *texture,
			  struct pipe_subresource sr,
			  unsigned usage,
			  const struct pipe_box *box)
{
    struct r300_texture *tex = (struct r300_texture *)texture;
    struct r300_screen *r300screen = r300_screen(ctx->screen);
    struct r300_transfer *trans;
    struct pipe_resource template;

    trans = CALLOC_STRUCT(r300_transfer);
    if (trans) {
        /* Initialize the transfer object. */
        pipe_resource_reference(&trans->transfer.resource, texture);
        trans->transfer.sr = sr;
        trans->transfer.usage = usage;
        trans->transfer.box = *box;
        trans->ctx = ctx;

        /* If the texture is tiled, we must create a temporary detiled texture
         * for this transfer. */
        if (tex->microtile || tex->macrotile) {
            trans->render_target_usage =
                util_format_is_depth_or_stencil(texture->format) ?
                PIPE_TEXTURE_USAGE_DEPTH_STENCIL :
                PIPE_TEXTURE_USAGE_RENDER_TARGET;

            template.target = PIPE_TEXTURE_2D;
            template.format = texture->format;
            template.width0 = box->width;
            template.height0 = box->height;
            template.depth0 = 0;
            template.last_level = 0;
            template.nr_samples = 0;
            template.tex_usage = PIPE_TEXTURE_USAGE_DYNAMIC |
                                 R300_TEXTURE_USAGE_TRANSFER;

            /* For texture reading, the temporary (detiled) texture is used as
             * a render target when blitting from a tiled texture. */
            if (usage & PIPE_TRANSFER_READ) {
                template.tex_usage |= trans->render_target_usage;
            }
            /* For texture writing, the temporary texture is used as a sampler
             * when blitting into a tiled texture. */
            if (usage & PIPE_TRANSFER_WRITE) {
                template.tex_usage |= PIPE_TEXTURE_USAGE_SAMPLER;
            }

            /* Create the temporary texture. */
            trans->detiled_texture = (struct r300_texture*)
               ctx->screen->resource_create(ctx->screen,
                                           &template);

            assert(!trans->detiled_texture->microtile &&
                   !trans->detiled_texture->macrotile);

            /* Set the stride.
	     *
	     * Even though we are using an internal texture for this,
	     * the transfer sr, box and usage parameters still reflect
	     * the arguments received to get_transfer.  We just do the
	     * right thing internally.
	     */
            trans->transfer.stride =
                r300_texture_get_stride(r300screen, trans->detiled_texture, 0);

            if (usage & PIPE_TRANSFER_READ) {
                /* We cannot map a tiled texture directly because the data is
                 * in a different order, therefore we do detiling using a blit. */
                r300_copy_from_tiled_texture(ctx, trans);
            }
        } else {
            trans->transfer.stride =
                r300_texture_get_stride(r300screen, tex, sr.level);
            trans->offset = r300_texture_get_offset(tex, sr.level, box->z, sr.face);
        }
    }
    return &trans->transfer;
}

void r300_texture_transfer_destroy(struct pipe_context *ctx,
				   struct pipe_transfer *trans)
{
    struct r300_transfer *r300transfer = r300_transfer(trans);

    if (r300transfer->detiled_texture) {
        if (trans->usage & PIPE_TRANSFER_WRITE) {
            r300_copy_into_tiled_texture(r300transfer->ctx, r300transfer);
        }

        pipe_resource_reference(
            (struct pipe_resource**)&r300transfer->detiled_texture, NULL);
    }
    pipe_resource_reference(&trans->resource, NULL);
    FREE(trans);
}

void* r300_texture_transfer_map(struct pipe_context *ctx,
				struct pipe_transfer *transfer)
{
    struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
    struct r300_transfer *r300transfer = r300_transfer(transfer);
    struct r300_texture *tex = (struct r300_texture*)transfer->resource;
    char *map;
    enum pipe_format format = tex->b.b.format;

    if (r300transfer->detiled_texture) {
        /* The detiled texture is of the same size as the region being mapped
         * (no offset needed). */
        return rws->buffer_map(rws,
                               r300transfer->detiled_texture->buffer,
                               transfer->usage);
    } else {
        /* Tiling is disabled. */
        map = rws->buffer_map(rws, tex->buffer,
                              transfer->usage);

        if (!map) {
            return NULL;
        }

        return map + r300_transfer(transfer)->offset +
            transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
            transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
    }
}

void r300_texture_transfer_unmap(struct pipe_context *ctx,
				 struct pipe_transfer *transfer)
{
    struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
    struct r300_transfer *r300transfer = r300_transfer(transfer);
    struct r300_texture *tex = (struct r300_texture*)transfer->resource;

    if (r300transfer->detiled_texture) {
	rws->buffer_unmap(rws, r300transfer->detiled_texture->buffer);
    } else {
        rws->buffer_unmap(rws, tex->buffer);
    }
}