diff options
Diffstat (limited to 'bltsville/gcbv/mirror/gcmap.c')
| -rw-r--r-- | bltsville/gcbv/mirror/gcmap.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/bltsville/gcbv/mirror/gcmap.c b/bltsville/gcbv/mirror/gcmap.c new file mode 100644 index 0000000..3f2b3f3 --- /dev/null +++ b/bltsville/gcbv/mirror/gcmap.c @@ -0,0 +1,342 @@ +/* + * Copyright(c) 2012, + * Texas Instruments, Inc. and Vivante Corporation. + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Vivante Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "gcbv.h" + +#define GCZONE_NONE 0 +#define GCZONE_ALL (~0U) +#define GCZONE_MAPPING (1 << 0) + +GCDBG_FILTERDEF(map, GCZONE_NONE, + "mapping") + + +/******************************************************************************* + * Memory management. + */ + +enum bverror do_map(struct bvbuffdesc *bvbuffdesc, + struct gcbatch *batch, + struct bvbuffmap **map) +{ + static const int mapsize + = sizeof(struct bvbuffmap) + + sizeof(struct bvbuffmapinfo); + + enum bverror bverror; + struct gccontext *gccontext = get_context(); + struct bvbuffmap *bvbuffmap; + struct bvbuffmapinfo *bvbuffmapinfo; + struct bvphysdesc *bvphysdesc; + bool mappedbyothers; + struct gcimap gcimap; + struct gcschedunmap *gcschedunmap; + + GCENTERARG(GCZONE_MAPPING, "bvbuffdesc = 0x%08X\n", + (unsigned int) bvbuffdesc); + + /* Lock access to the mapping list. */ + GCLOCK(&gccontext->maplock); + + /* Try to find existing mapping. */ + bvbuffmap = bvbuffdesc->map; + while (bvbuffmap != NULL) { + if (bvbuffmap->bv_unmap == bv_unmap) + break; + bvbuffmap = bvbuffmap->nextmap; + } + + /* Not mapped yet? */ + if (bvbuffmap == NULL) { + /* New mapping, allocate a record. */ + if (gccontext->buffmapvac == NULL) { + bvbuffmap = gcalloc(struct bvbuffmap, mapsize); + if (bvbuffmap == NULL) { + BVSETERROR(BVERR_OOM, + "failed to allocate mapping record"); + goto fail; + } + + bvbuffmap->structsize = sizeof(struct bvbuffmap); + bvbuffmap->bv_unmap = bv_unmap; + bvbuffmap->handle = (unsigned long) (bvbuffmap + 1); + } else { + bvbuffmap = gccontext->buffmapvac; + gccontext->buffmapvac = bvbuffmap->nextmap; + } + + /* Setup buffer mapping. Here we need to check and make sure + * that the buffer starts at a location that is supported by + * the hw. If it is not, offset is computed and the buffer is + * extended by the value of the offset. */ + gcimap.gcerror = GCERR_NONE; + gcimap.handle = 0; + + if (bvbuffdesc->auxtype == BVAT_PHYSDESC) { + bvphysdesc = (struct bvphysdesc *) bvbuffdesc->auxptr; + + if (bvphysdesc->structsize < + STRUCTSIZE(bvphysdesc, pageoffset)) { + BVSETERROR(BVERR_BUFFERDESC_VERS, + "unsupported bvphysdesc version"); + goto fail; + } + + gcimap.buf.offset = bvphysdesc->pageoffset; + gcimap.pagesize = bvphysdesc->pagesize; + gcimap.pagearray = bvphysdesc->pagearray; + gcimap.size = bvbuffdesc->length; + + GCDBG(GCZONE_MAPPING, "new mapping (%s):\n", + (batch == NULL) ? "explicit" : "implicit"); + GCDBG(GCZONE_MAPPING, "pagesize = %lu\n", + bvphysdesc->pagesize); + GCDBG(GCZONE_MAPPING, "pagearray = 0x%08X\n", + (unsigned int) bvphysdesc->pagearray); + GCDBG(GCZONE_MAPPING, "pageoffset = %lu\n", + bvphysdesc->pageoffset); + GCDBG(GCZONE_MAPPING, "mapping size = %d\n", + gcimap.size); + } else { + gcimap.buf.logical = bvbuffdesc->virtaddr; + gcimap.pagesize = 0; + gcimap.pagearray = NULL; + gcimap.size = bvbuffdesc->length; + + GCDBG(GCZONE_MAPPING, "new mapping (%s):\n", + (batch == NULL) ? "explicit" : "implicit"); + GCDBG(GCZONE_MAPPING, "specified virtaddr = 0x%08X\n", + (unsigned int) bvbuffdesc->virtaddr); + GCDBG(GCZONE_MAPPING, "aligned virtaddr = 0x%08X\n", + (unsigned int) gcimap.buf.logical); + GCDBG(GCZONE_MAPPING, "mapping size = %d\n", + gcimap.size); + } + + gc_map_wrapper(&gcimap); + if (gcimap.gcerror != GCERR_NONE) { + BVSETERROR(BVERR_OOM, + "unable to allocate gccore memory"); + goto fail; + } + + /* Set map handle. */ + bvbuffmapinfo = (struct bvbuffmapinfo *) bvbuffmap->handle; + bvbuffmapinfo->handle = gcimap.handle; + + /* Initialize reference counters. */ + if (batch == NULL) { + /* Explicit mapping. */ + bvbuffmapinfo->usermap = 1; + bvbuffmapinfo->automap = 0; + } else { + /* Implicit mapping; if there are existing mappings + * from other implementations, mark this an explicit + * mapping as well. */ + mappedbyothers = (bvbuffdesc->map != NULL); + GCDBG(GCZONE_MAPPING, "%smapped by others.\n", + mappedbyothers ? "" : "not "); + + bvbuffmapinfo->usermap = mappedbyothers ? 1 : 0; + bvbuffmapinfo->automap = 1; + } + + /* Add the record to the list of mappings. */ + bvbuffmap->nextmap = bvbuffdesc->map; + bvbuffdesc->map = bvbuffmap; + } else { + /* Mapping already exists. */ + bvbuffmapinfo = (struct bvbuffmapinfo *) bvbuffmap->handle; + + /* Advance reference counters. */ + if (batch == NULL) { + /* Explicit mapping. */ + GCDBG(GCZONE_MAPPING, "explicit map.\n"); + bvbuffmapinfo->usermap += 1; + } else { + /* Implicit mapping. */ + GCDBG(GCZONE_MAPPING, "implicit map.\n"); + bvbuffmapinfo->automap += 1; + } + + GCDBG(GCZONE_MAPPING, "mapping exists.\n"); + } + + GCDBG(GCZONE_MAPPING, "bvbuffmap = 0x%08X\n", + (unsigned int) bvbuffmap); + GCDBG(GCZONE_MAPPING, "explicit count = %d\n", + bvbuffmapinfo->usermap); + GCDBG(GCZONE_MAPPING, "implicit count = %d\n", + bvbuffmapinfo->automap); + + /* Schedule for unmapping. */ + if (batch != NULL) { + if (list_empty(&gccontext->unmapvac)) { + gcschedunmap = gcalloc(struct gcschedunmap, + sizeof(struct gcschedunmap)); + if (gcschedunmap == NULL) { + BVSETERROR(BVERR_OOM, + "failed to schedule unmapping"); + goto fail; + } + list_add(&gcschedunmap->link, &batch->unmap); + } else { + struct list_head *head; + head = gccontext->unmapvac.next; + gcschedunmap = list_entry(head, + struct gcschedunmap, + link); + list_move(&gcschedunmap->link, &batch->unmap); + } + + gcschedunmap->handle = (unsigned long) bvbuffdesc; + + GCDBG(GCZONE_MAPPING, "scheduled for unmapping.\n"); + } + + /* Set the map pointer. */ + *map = bvbuffmap; + + /* Unlock access to the mapping list. */ + GCUNLOCK(&gccontext->maplock); + + GCEXITARG(GCZONE_MAPPING, "handle = 0x%08X\n", + bvbuffmapinfo->handle); + return BVERR_NONE; + +fail: + if (bvbuffmap != NULL) { + bvbuffmap->nextmap = gccontext->buffmapvac; + gccontext->buffmapvac = bvbuffmap; + } + + /* Unlock access to the mapping list. */ + GCUNLOCK(&gccontext->maplock); + + GCEXITARG(GCZONE_MAPPING, "bverror = %d\n", bverror); + return bverror; +} + +void do_unmap_implicit(struct gcbatch *batch) +{ + struct gccontext *gccontext = get_context(); + struct list_head *head, *temphead; + struct gcschedunmap *gcschedunmap; + struct bvbuffdesc *bvbuffdesc; + struct bvbuffmap *prev, *bvbuffmap; + struct bvbuffmapinfo *bvbuffmapinfo; + + GCENTER(GCZONE_MAPPING); + + /* Lock access to the mapping list. */ + GCLOCK(&gccontext->maplock); + + /* Scan scheduled unmappings and remove the ones that are still + * in use. */ + list_for_each_safe(head, temphead, &batch->unmap) { + gcschedunmap = list_entry(head, struct gcschedunmap, link); + + /* Cast the handle. */ + bvbuffdesc = (struct bvbuffdesc *) gcschedunmap->handle; + + /* Find our mapping. */ + prev = NULL; + bvbuffmap = bvbuffdesc->map; + while (bvbuffmap != NULL) { + if (bvbuffmap->bv_unmap == bv_unmap) + break; + prev = bvbuffmap; + bvbuffmap = bvbuffmap->nextmap; + } + + /* Not found? */ + if (bvbuffmap == NULL) { + GCERR("mapping not found for bvbuffdesc 0x%08X.\n", + (unsigned int) bvbuffdesc); + + /* Remove scheduled unmapping. */ + list_move(head, &gccontext->unmapvac); + continue; + } + + /* Get the info structure. */ + bvbuffmapinfo = (struct bvbuffmapinfo *) bvbuffmap->handle; + + GCDBG(GCZONE_MAPPING, "head = 0x%08X\n", + (unsigned int) gcschedunmap); + GCDBG(GCZONE_MAPPING, " bvbuffmap = 0x%08X\n", + (unsigned int) bvbuffmap); + GCDBG(GCZONE_MAPPING, " handle = 0x%08X\n", + bvbuffmapinfo->handle); + + /* Implicit unmapping. */ + bvbuffmapinfo->automap -= 1; + if (bvbuffmapinfo->automap < 0) { + GCERR("implicit count negative.\n"); + bvbuffmapinfo->automap = 0; + } + + GCDBG(GCZONE_MAPPING, " explicit count = %d\n", + bvbuffmapinfo->usermap); + GCDBG(GCZONE_MAPPING, " implicit count = %d\n", + bvbuffmapinfo->automap); + + /* Still referenced? */ + if (bvbuffmapinfo->usermap || bvbuffmapinfo->automap) { + GCDBG(GCZONE_MAPPING, " still referenced.\n"); + + /* Remove scheduled unmapping. */ + list_move(head, &gccontext->unmapvac); + continue; + } + + GCDBG(GCZONE_MAPPING, " ready for unmapping.\n"); + + /* Set the handle. */ + gcschedunmap->handle = bvbuffmapinfo->handle; + + /* Remove from the buffer descriptor. */ + if (prev == NULL) + bvbuffdesc->map = bvbuffmap->nextmap; + else + prev->nextmap = bvbuffmap->nextmap; + + /* Add to the vacant list. */ + bvbuffmap->nextmap = gccontext->buffmapvac; + gccontext->buffmapvac = bvbuffmap; + } + + /* Unlock access to the mapping list. */ + GCUNLOCK(&gccontext->maplock); + + GCEXIT(GCZONE_MAPPING); +} |