diff options
Diffstat (limited to 'bltsville/gcbv/mirror/gcmap.c')
| -rw-r--r-- | bltsville/gcbv/mirror/gcmap.c | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/bltsville/gcbv/mirror/gcmap.c b/bltsville/gcbv/mirror/gcmap.c deleted file mode 100644 index 3f2b3f3..0000000 --- a/bltsville/gcbv/mirror/gcmap.c +++ /dev/null @@ -1,342 +0,0 @@ -/* - * 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); -} |