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Diffstat (limited to 'rtemsbsd/powerpc/include/linux/genalloc.h')
-rw-r--r-- | rtemsbsd/powerpc/include/linux/genalloc.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/rtemsbsd/powerpc/include/linux/genalloc.h b/rtemsbsd/powerpc/include/linux/genalloc.h new file mode 100644 index 00000000..9df0e430 --- /dev/null +++ b/rtemsbsd/powerpc/include/linux/genalloc.h @@ -0,0 +1,130 @@ +/************************************************************************** + +Copyright (c) 2007, 2008 Chelsio Inc. +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + 2. Neither the name of the Chelsio 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. +***************************************************************************/ + +#ifndef _LINUX_GENALLOC_H +#define _LINUX_GENALLOC_H + +#include <sys/blist.h> +#include <sys/malloc.h> + +struct gen_pool { + blist_t gen_list; + daddr_t gen_base; + int gen_chunk_shift; + struct mtx gen_lock; +}; + +static inline struct gen_pool * +gen_pool_create(int min_alloc_order, int nid) +{ + struct gen_pool *gp; + + gp = malloc(sizeof(*gp), M_DEVBUF, M_NOWAIT | M_ZERO); + if (gp == NULL) + return (NULL); + + gp->gen_chunk_shift = min_alloc_order; + mtx_init(&gp->gen_lock, "genpool", NULL, MTX_DEF); + return (gp); +} + +static inline int +gen_pool_add_virt(struct gen_pool *gp, daddr_t virt, daddr_t phys, + size_t size, int nid) +{ + + (void)phys; + (void)nid; + + if (gp->gen_base != 0) + return (-ENOMEM); + + gp->gen_list = blist_create(size >> gp->gen_chunk_shift, M_NOWAIT); + if (gp->gen_list == NULL) + return (-ENOMEM); + + gp->gen_base = virt; + blist_free(gp->gen_list, 0, size >> gp->gen_chunk_shift); + return (0); +} + +static inline int +gen_pool_add(struct gen_pool *gp, daddr_t addr, size_t size, int nid) +{ + + return (gen_pool_add_virt(gp, addr, -1, size, nid)); +} + +static inline daddr_t +gen_pool_alloc(struct gen_pool *gp, size_t size) +{ + int chunks; + daddr_t blkno; + + chunks = (size + (1 << gp->gen_chunk_shift) - 1) >> gp->gen_chunk_shift; + mtx_lock(&gp->gen_lock); + blkno = blist_alloc(gp->gen_list, chunks); + mtx_unlock(&gp->gen_lock); + + if (blkno == SWAPBLK_NONE) + return (0); + + return (gp->gen_base + ((1 << gp->gen_chunk_shift) * blkno)); +} + +static inline void +gen_pool_free(struct gen_pool *gp, daddr_t address, size_t size) +{ + int chunks; + daddr_t blkno; + + chunks = (size + (1<<gp->gen_chunk_shift) - 1) >> gp->gen_chunk_shift; + blkno = (address - gp->gen_base) / (1 << gp->gen_chunk_shift); + mtx_lock(&gp->gen_lock); + blist_free(gp->gen_list, blkno, chunks); + mtx_unlock(&gp->gen_lock); +} + +static __inline void +gen_pool_destroy(struct gen_pool *gp) +{ + blist_destroy(gp->gen_list); + free(gp, M_DEVBUF); +} + +static inline struct gen_pool * +devm_gen_pool_create(struct device *dev, int min_alloc_order, int nid, + const char *name) +{ + + (void)dev; + (void)name; + return (gen_pool_create(min_alloc_order, nid)); +} + +#endif /* _LINUX_GENALLOC_H */ |