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    util_range_destroy(&vbuf->valid_buffer_range);
  37    vs->vws->resource_unref(vs->vws, vbuf->base.hw_res);
  38    FREE(vbuf);
  39 }
  40
  41 static void *virgl_buffer_transfer_map(struct pipe_context *ctx,
  42                                        struct pipe_resource *resource,
  43                                        unsigned level,
  44                                        unsigned usage,
  45                                        const struct pipe_box *box,
  46                                        struct pipe_transfer **transfer)
  47 {
  48    struct virgl_context *vctx = virgl_context(ctx);
  49    struct virgl_screen *vs = virgl_screen(ctx->screen);
  50    struct virgl_buffer *vbuf = virgl_buffer(resource);
  51    struct virgl_transfer *trans;
  52    void *ptr;
  53    bool readback;
  54    uint32_t offset;
  55    bool doflushwait = false;
  56
  57    if ((usage & PIPE_TRANSFER_READ) && (vbuf->on_list == TRUE))
  58       doflushwait = true;
  59    else
  60       doflushwait = virgl_res_needs_flush_wait(vctx, &vbuf->base, usage);
  61
  62    if (doflushwait)
  63       ctx->flush(ctx, NULL, 0);
  64
  65    trans = slab_alloc(&vctx->transfer_pool);
  66    if (!trans)
  67       return NULL;
  68
  69    trans->base.resource = resource;
  70    trans->base.level = level;
  71    trans->base.usage = usage;
  72    trans->base.box = *box;
  73    trans->base.stride = 0;
  74    trans->base.layer_stride = 0;
  75
  76    offset = box->x;
  77
  78    readback = virgl_res_needs_readback(vctx, &vbuf->base, usage);
  79    if (readback)
  80       vs->vws->transfer_get(vs->vws, vbuf->base.hw_res, box, trans->base.stride, trans->base.layer_stride, offset, level);
  81
  82    if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED))
  83       doflushwait = true;
  84
  85    if (doflushwait || readback)
  86       vs->vws->resource_wait(vs->vws, vbuf->base.hw_res);
  87
  88    ptr = vs->vws->resource_map(vs->vws, vbuf->base.hw_res);
  89    if (!ptr) {
  90       return NULL;
  91    }
  92
  93    trans->offset = offset;
  94    *transfer = &trans->base;
  95
  96    return ptr + trans->offset;
  97 }
  98
  99 static void virgl_buffer_transfer_unmap(struct pipe_context *ctx,
 100                                         struct pipe_transfer *transfer)
 101 {
 102    struct virgl_context *vctx = virgl_context(ctx);
 103    struct virgl_transfer *trans = virgl_transfer(transfer);
 104    struct virgl_buffer *vbuf = virgl_buffer(transfer->resource);
 105
 106    if (trans->base.usage & PIPE_TRANSFER_WRITE) {
 107       if (!(transfer->usage & PIPE_TRANSFER_FLUSH_EXPLICIT)) {
 108          struct virgl_screen *vs = virgl_screen(ctx->screen);
 109          vctx->num_transfers++;
 110          vs->vws->transfer_put(vs->vws, vbuf->base.hw_res,
 111                                &transfer->box, trans->base.stride, trans->base.layer_stride, trans->offset, transfer->level);
 112
 113       }
 114    }
 115
 116    slab_free(&vctx->transfer_pool, trans);
 117 }
 118
 119 static void virgl_buffer_transfer_flush_region(struct pipe_context *ctx,
 120                                                struct pipe_transfer *transfer,
 121                                                const struct pipe_box *box)
 122 {
 123    struct virgl_context *vctx = virgl_context(ctx);
 124    struct virgl_buffer *vbuf = virgl_buffer(transfer->resource);
 125
 126    if (!vbuf->on_list) {
 127        struct pipe_resource *res = NULL;
 128
 129        list_addtail(&vbuf->flush_list, &vctx->to_flush_bufs);
 130        vbuf->on_list = TRUE;
 131        pipe_resource_reference(&res, &vbuf->base.u.b);
 132    }
 133
 134    util_range_add(&vbuf->valid_buffer_range, transfer->box.x + box->x,
 135                   transfer->box.x + box->x + box->width);
 136
 137    vbuf->base.clean = FALSE;
 138 }
 139
 140 static const struct u_resource_vtbl virgl_buffer_vtbl =
 141 {
 142    u_default_resource_get_handle,            /* get_handle */
 143    virgl_buffer_destroy,                     /* resource_destroy */
 144    virgl_buffer_transfer_map,                /* transfer_map */
 145    virgl_buffer_transfer_flush_region,       /* transfer_flush_region */
 146    virgl_buffer_transfer_unmap,              /* transfer_unmap */
 147 };
 148
 149 struct pipe_resource *virgl_buffer_create(struct virgl_screen *vs,
 150                                           const struct pipe_resource *template)
 151 {
 152    struct virgl_buffer *buf;
 153    uint32_t size;
 154    uint32_t vbind;
 155    buf = CALLOC_STRUCT(virgl_buffer);
 156    buf->base.clean = TRUE;
 157    buf->base.u.b = *template;
 158    buf->base.u.b.screen = &vs->base;
 159    buf->base.u.vtbl = &virgl_buffer_vtbl;
 160    pipe_reference_init(&buf->base.u.b.reference, 1);
 161    util_range_init(&buf->valid_buffer_range);
 162
 163    vbind = pipe_to_virgl_bind(template->bind);
 164    size = template->width0;
 165
 166    buf->base.hw_res = vs->vws->resource_create(vs->vws, template->target, template->format, vbind, template->width0, 1, 1, 1, 0, 0, size);
 167
 168    util_range_set_empty(&buf->valid_buffer_range);
 169    return &buf->base.u.b;
 170 }