1 /********************************************************** 2 * Copyright 2009-2015 VMware, Inc. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person 5 * obtaining a copy of this software and associated documentation 6 * files (the "Software"), to deal in the Software without 7 * restriction, including without limitation the rights to use, copy, 8 * modify, merge, publish, distribute, sublicense, and/or sell copies 9 * of the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 * 24 **********************************************************/ 25 26 27 #include "svga_cmd.h" 28 #include "util/u_debug.h" 29 #include "util/u_memory.h" 30 #include "pipe/p_defines.h" 31 #include "vmw_surface.h" 32 #include "vmw_screen.h" 33 #include "vmw_buffer.h" 34 #include "vmw_context.h" 35 #include "pipebuffer/pb_bufmgr.h" 36 37 38 void * 39 vmw_svga_winsys_surface_map(struct svga_winsys_context *swc, 40 struct svga_winsys_surface *srf, 41 unsigned flags, boolean *retry) 42 { 43 struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf); 44 void *data = NULL; 45 struct pb_buffer *pb_buf; 46 uint32_t pb_flags; 47 struct vmw_winsys_screen *vws = vsrf->screen; 48 49 *retry = FALSE; 50 assert((flags & (PIPE_TRANSFER_READ | PIPE_TRANSFER_WRITE)) != 0); 51 mtx_lock(&vsrf->mutex); 52 53 if (vsrf->mapcount) { 54 /* 55 * Only allow multiple readers to map. 56 */ 57 if ((flags & PIPE_TRANSFER_WRITE) || 58 (vsrf->map_mode & PIPE_TRANSFER_WRITE)) 59 goto out_unlock; 60 61 data = vsrf->data; 62 goto out_mapped; 63 } 64 65 vsrf->rebind = FALSE; 66 67 /* 68 * If we intend to read, there's no point discarding the 69 * data if busy. 70 */ 71 if (flags & PIPE_TRANSFER_READ || vsrf->shared) 72 flags &= ~PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE; 73 74 /* 75 * Discard is a hint to a synchronized map. 76 */ 77 if (flags & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) 78 flags &= ~PIPE_TRANSFER_UNSYNCHRONIZED; 79 80 /* 81 * The surface is allowed to be referenced on the command stream iff 82 * we're mapping unsynchronized or discard. This is an early check. 83 * We need to recheck after a failing discard map. 84 */ 85 if (!(flags & (PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE | 86 PIPE_TRANSFER_UNSYNCHRONIZED)) && 87 p_atomic_read(&vsrf->validated)) { 88 *retry = TRUE; 89 goto out_unlock; 90 } 91 92 pb_flags = flags & (PIPE_TRANSFER_READ_WRITE | PIPE_TRANSFER_UNSYNCHRONIZED); 93 94 if (flags & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) { 95 struct pb_manager *provider; 96 struct pb_desc desc; 97 98 /* 99 * First, if possible, try to map existing storage with DONTBLOCK. 100 */ 101 if (!p_atomic_read(&vsrf->validated)) { 102 data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf, 103 PIPE_TRANSFER_DONTBLOCK | pb_flags); 104 if (data) 105 goto out_mapped; 106 } 107 108 /* 109 * Attempt to get a new buffer. 110 */ 111 provider = vws->pools.mob_fenced; 112 memset(&desc, 0, sizeof(desc)); 113 desc.alignment = 4096; 114 pb_buf = provider->create_buffer(provider, vsrf->size, &desc); 115 if (pb_buf != NULL) { 116 struct svga_winsys_buffer *vbuf = 117 vmw_svga_winsys_buffer_wrap(pb_buf); 118 119 data = vmw_svga_winsys_buffer_map(&vws->base, vbuf, pb_flags); 120 if (data) { 121 vsrf->rebind = TRUE; 122 /* 123 * We've discarded data on this surface and thus 124 * it's data is no longer consider referenced. 125 */ 126 vmw_swc_surface_clear_reference(swc, vsrf); 127 if (vsrf->buf) 128 vmw_svga_winsys_buffer_destroy(&vws->base, vsrf->buf); 129 vsrf->buf = vbuf; 130 goto out_mapped; 131 } else 132 vmw_svga_winsys_buffer_destroy(&vws->base, vbuf); 133 } 134 /* 135 * We couldn't get and map a new buffer for some reason. 136 * Fall through to an ordinary map. 137 * But tell pipe driver to flush now if already on validate list, 138 * Otherwise we'll overwrite previous contents. 139 */ 140 if (!(flags & PIPE_TRANSFER_UNSYNCHRONIZED) && 141 p_atomic_read(&vsrf->validated)) { 142 *retry = TRUE; 143 goto out_unlock; 144 } 145 } 146 147 pb_flags |= (flags & PIPE_TRANSFER_DONTBLOCK); 148 data = vmw_svga_winsys_buffer_map(&vws->base, vsrf->buf, pb_flags); 149 if (data == NULL) 150 goto out_unlock; 151 152 out_mapped: 153 ++vsrf->mapcount; 154 vsrf->data = data; 155 vsrf->map_mode = flags & (PIPE_TRANSFER_READ | PIPE_TRANSFER_WRITE); 156 out_unlock: 157 mtx_unlock(&vsrf->mutex); 158 return data; 159 } 160 161 162 void 163 vmw_svga_winsys_surface_unmap(struct svga_winsys_context *swc, 164 struct svga_winsys_surface *srf, 165 boolean *rebind) 166 { 167 struct vmw_svga_winsys_surface *vsrf = vmw_svga_winsys_surface(srf); 168 mtx_lock(&vsrf->mutex); 169 if (--vsrf->mapcount == 0) { 170 *rebind = vsrf->rebind; 171 vsrf->rebind = FALSE; 172 vmw_svga_winsys_buffer_unmap(&vsrf->screen->base, vsrf->buf); 173 } else { 174 *rebind = FALSE; 175 } 176 mtx_unlock(&vsrf->mutex); 177 } 178 179 enum pipe_error 180 vmw_svga_winsys_surface_invalidate(struct svga_winsys_context *swc, 181 struct svga_winsys_surface *surf) 182 { 183 /* this is a noop since surface invalidation is not needed for DMA path. 184 * DMA is enabled when guest-backed surface is not enabled or 185 * guest-backed dma is enabled. Since guest-backed dma is enabled 186 * when guest-backed surface is enabled, that implies DMA is always enabled; 187 * hence, surface invalidation is not needed. 188 */ 189 return PIPE_OK; 190 } 191 192 void 193 vmw_svga_winsys_surface_reference(struct vmw_svga_winsys_surface **pdst, 194 struct vmw_svga_winsys_surface *src) 195 { 196 struct pipe_reference *src_ref; 197 struct pipe_reference *dst_ref; 198 struct vmw_svga_winsys_surface *dst; 199 200 if(pdst == NULL || *pdst == src) 201 return; 202 203 dst = *pdst; 204 205 src_ref = src ? &src->refcnt : NULL; 206 dst_ref = dst ? &dst->refcnt : NULL; 207 208 if (pipe_reference(dst_ref, src_ref)) { 209 if (dst->buf) 210 vmw_svga_winsys_buffer_destroy(&dst->screen->base, dst->buf); 211 vmw_ioctl_surface_destroy(dst->screen, dst->sid); 212 #ifdef DEBUG 213 /* to detect dangling pointers */ 214 assert(p_atomic_read(&dst->validated) == 0); 215 dst->sid = SVGA3D_INVALID_ID; 216 #endif 217 mtx_destroy(&dst->mutex); 218 FREE(dst); 219 } 220 221 *pdst = src; 222 } 223