vasilito
7686729069
Extract protocol-agnostic FenceTimeline from Intel to shared src/drivers/fence.rs — atomic-based fence tracking suitable for Intel, VIRGL, and AMD drivers. Extract protocol-agnostic SyncobjManager from Intel to shared src/drivers/syncobj.rs — syncobj create/destroy/signal/reset/ wait/query and sync_file fd export/import. Wire both into VirtioDriver: - Add FenceTimeline + SyncobjManager fields - Implement all 5 GpuDriver syncobj trait methods (create, destroy, wait, export_fd, import_fd) - Track fence seqnos in virgl_submit_3d (allocate before submit, signal after completion) Intel fence.rs and syncobj.rs converted to thin re-export modules pointing at shared sources — no behavioral change for Intel driver. This gives Mesa VIRGL userspace the standard DRM syncobj API for GPU/compositor synchronization.
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
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* Copyright (c) Christos Zoulas 2017.
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* All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "file.h"
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#ifndef lint
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FILE_RCSID("@(#)$File: buffer.c,v 1.13 2023/07/02 12:48:39 christos Exp $")
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#endif /* lint */
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#include "magic.h"
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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void
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buffer_init(struct buffer *b, int fd, const struct stat *st, const void *data,
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size_t len)
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{
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b->fd = fd;
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if (st)
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memcpy(&b->st, st, sizeof(b->st));
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else if (b->fd == -1 || fstat(b->fd, &b->st) == -1)
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memset(&b->st, 0, sizeof(b->st));
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b->fbuf = data;
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b->flen = len;
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b->eoff = 0;
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b->ebuf = NULL;
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b->elen = 0;
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}
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void
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buffer_fini(struct buffer *b)
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{
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free(b->ebuf);
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b->ebuf = NULL;
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b->elen = 0;
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}
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int
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buffer_fill(const struct buffer *bb)
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{
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struct buffer *b = CCAST(struct buffer *, bb);
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if (b->elen != 0)
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return b->elen == FILE_BADSIZE ? -1 : 0;
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if (!S_ISREG(b->st.st_mode))
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goto out;
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b->elen = CAST(size_t, b->st.st_size) < b->flen ?
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CAST(size_t, b->st.st_size) : b->flen;
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if (b->elen == 0) {
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free(b->ebuf);
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b->ebuf = NULL;
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return 0;
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}
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if ((b->ebuf = malloc(b->elen)) == NULL)
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goto out;
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b->eoff = b->st.st_size - b->elen;
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if (pread(b->fd, b->ebuf, b->elen, b->eoff) == -1) {
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free(b->ebuf);
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b->ebuf = NULL;
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goto out;
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}
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return 0;
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out:
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b->elen = FILE_BADSIZE;
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return -1;
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}
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