src/gallium/drivers/virgl/virgl_buffer.c

   1 /*
   2  * Copyright 2014, 2015 Red Hat.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "util/u_inlines.h"
  25 #include "util/u_memory.h"
  26 #include "virgl_context.h"
  27 #include "virgl_resource.h"
  28 #include "virgl_screen.h"
  29
  30 static void virgl_buffer_destroy(struct pipe_screen *screen,
  31                                  struct pipe_resource *buf)
  32 {
  33    struct virgl_screen *vs = virgl_screen(screen);
  34    struct virgl_buffer *vbuf = virgl_buffer(buf);
  35
  36    vs->vws->resource_unref(vs->vws, vbuf->base.hw_res);
  37    FREE(vbuf);
  38 }
  39
  40 static void *virgl_buffer_transfer_map(struct pipe_context *ctx,
  41                                        struct pipe_resource *resource,
  42                                        unsigned level,
  43                                        unsigned usage,
  44                                        const struct pipe_box *box,
  45                                        struct pipe_transfer **transfer)
  46 {
  47    struct virgl_context *vctx = virgl_context(ctx);
  48    struct virgl_screen *vs = virgl_screen(ctx->screen);
  49    struct virgl_buffer *vbuf = virgl_buffer(resource);
  50    struct virgl_transfer *trans;
  51    void *ptr;
  52    bool readback;
  53    bool doflushwait = false;
  54
  55    if (usage & PIPE_TRANSFER_READ)
  56       doflushwait = true;
  57    else
  58       doflushwait = virgl_res_needs_flush_wait(vctx, &vbuf->base, usage);
  59
  60    if (doflushwait)
  61       ctx->flush(ctx, NULL, 0);
  62
  63    trans = virgl_resource_create_transfer(ctx, resource, &vbuf->metadata, level,
  64                                           usage, box);
  65
  66    readback = virgl_res_needs_readback(vctx, &vbuf->base, usage);
  67    if (readback)
  68       vs->vws->transfer_get(vs->vws, vbuf->base.hw_res, box, trans->base.stride,
  69                             trans->l_stride, trans->offset, level);
  70
  71    if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED))
  72       doflushwait = true;
  73
  74    if (doflushwait || readback)
  75       vs->vws->resource_wait(vs->vws, vbuf->base.hw_res);
  76
  77    ptr = vs->vws->resource_map(vs->vws, vbuf->base.hw_res);
  78    if (!ptr) {
  79       return NULL;
  80    }
  81
  82    *transfer = &trans->base;
  83    return ptr + trans->offset;
  84 }
  85
  86 static void virgl_buffer_transfer_unmap(struct pipe_context *ctx,
  87                                         struct pipe_transfer *transfer)
  88 {
  89    struct virgl_context *vctx = virgl_context(ctx);
  90    struct virgl_transfer *trans = virgl_transfer(transfer);
  91    struct virgl_buffer *vbuf = virgl_buffer(transfer->resource);
  92
  93    if (trans->base.usage & PIPE_TRANSFER_WRITE) {
  94       struct virgl_screen *vs = virgl_screen(ctx->screen);
  95       if (transfer->usage & PIPE_TRANSFER_FLUSH_EXPLICIT) {
  96          transfer->box.x += trans->range.start;
  97          transfer->box.width = trans->range.end - trans->range.start;
  98          trans->offset = transfer->box.x;
  99       }
 100
 101       vctx->num_transfers++;
 102       vs->vws->transfer_put(vs->vws, vbuf->base.hw_res,
 103                             &transfer->box, trans->base.stride,
 104                             trans->l_stride, trans->offset,
 105                             transfer->level);
 106
 107    }
 108
 109    virgl_resource_destroy_transfer(vctx, trans);
 110 }
 111
 112 static void virgl_buffer_transfer_flush_region(struct pipe_context *ctx,
 113                                                struct pipe_transfer *transfer,
 114                                                const struct pipe_box *box)
 115 {
 116    struct virgl_buffer *vbuf = virgl_buffer(transfer->resource);
 117    struct virgl_transfer *trans = virgl_transfer(transfer);
 118
 119    /*
 120     * FIXME: This is not optimal.  For example,
 121     *
 122     * glMapBufferRange(.., 0, 100, GL_MAP_FLUSH_EXPLICIT_BIT)
 123     * glFlushMappedBufferRange(.., 25, 30)
 124     * glFlushMappedBufferRange(.., 65, 70)
 125     *
 126     * We'll end up flushing 25 --> 70.
 127     */
 128    util_range_add(&trans->range, box->x, box->x + box->width);
 129    vbuf->base.clean = FALSE;
 130 }
 131
 132 static const struct u_resource_vtbl virgl_buffer_vtbl =
 133 {
 134    u_default_resource_get_handle,            /* get_handle */
 135    virgl_buffer_destroy,                     /* resource_destroy */
 136    virgl_buffer_transfer_map,                /* transfer_map */
 137    virgl_buffer_transfer_flush_region,       /* transfer_flush_region */
 138    virgl_buffer_transfer_unmap,              /* transfer_unmap */
 139 };
 140
 141 struct pipe_resource *virgl_buffer_create(struct virgl_screen *vs,
 142                                           const struct pipe_resource *template)
 143 {
 144    struct virgl_buffer *buf;
 145    uint32_t vbind;
 146    buf = CALLOC_STRUCT(virgl_buffer);
 147    buf->base.clean = TRUE;
 148    buf->base.u.b = *template;
 149    buf->base.u.b.screen = &vs->base;
 150    buf->base.u.vtbl = &virgl_buffer_vtbl;
 151    pipe_reference_init(&buf->base.u.b.reference, 1);
 152    virgl_resource_layout(&buf->base.u.b, &buf->metadata);
 153
 154    vbind = pipe_to_virgl_bind(template->bind);
 155
 156    buf->base.hw_res = vs->vws->resource_create(vs->vws, template->target,
 157                                                template->format, vbind,
 158                                                template->width0, 1, 1, 1, 0, 0,
 159                                                buf->metadata.total_size);
 160
 161    return &buf->base.u.b;
 162 }