diff options
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_memfree.h')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_memfree.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.h b/drivers/infiniband/hw/mthca/mthca_memfree.h new file mode 100644 index 000000000000..a8fa97e140f5 --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_memfree.h @@ -0,0 +1,161 @@ +/* + * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * 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. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * $Id$ + */ + +#ifndef MTHCA_MEMFREE_H +#define MTHCA_MEMFREE_H + +#include <linux/list.h> +#include <linux/pci.h> + +#include <asm/semaphore.h> + +#define MTHCA_ICM_CHUNK_LEN \ + ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \ + (sizeof (struct scatterlist))) + +struct mthca_icm_chunk { + struct list_head list; + int npages; + int nsg; + struct scatterlist mem[MTHCA_ICM_CHUNK_LEN]; +}; + +struct mthca_icm { + struct list_head chunk_list; + int refcount; +}; + +struct mthca_icm_table { + u64 virt; + int num_icm; + int num_obj; + int obj_size; + int lowmem; + struct semaphore mutex; + struct mthca_icm *icm[0]; +}; + +struct mthca_icm_iter { + struct mthca_icm *icm; + struct mthca_icm_chunk *chunk; + int page_idx; +}; + +struct mthca_dev; + +struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages, + unsigned int gfp_mask); +void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm); + +struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev, + u64 virt, int obj_size, + int nobj, int reserved, + int use_lowmem); +void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table); +int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); +void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj); + +static inline void mthca_icm_first(struct mthca_icm *icm, + struct mthca_icm_iter *iter) +{ + iter->icm = icm; + iter->chunk = list_empty(&icm->chunk_list) ? + NULL : list_entry(icm->chunk_list.next, + struct mthca_icm_chunk, list); + iter->page_idx = 0; +} + +static inline int mthca_icm_last(struct mthca_icm_iter *iter) +{ + return !iter->chunk; +} + +static inline void mthca_icm_next(struct mthca_icm_iter *iter) +{ + if (++iter->page_idx >= iter->chunk->nsg) { + if (iter->chunk->list.next == &iter->icm->chunk_list) { + iter->chunk = NULL; + return; + } + + iter->chunk = list_entry(iter->chunk->list.next, + struct mthca_icm_chunk, list); + iter->page_idx = 0; + } +} + +static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter) +{ + return sg_dma_address(&iter->chunk->mem[iter->page_idx]); +} + +static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter) +{ + return sg_dma_len(&iter->chunk->mem[iter->page_idx]); +} + +enum { + MTHCA_DB_REC_PER_PAGE = 4096 / 8 +}; + +struct mthca_db_page { + DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE); + u64 *db_rec; + dma_addr_t mapping; +}; + +struct mthca_db_table { + int npages; + int max_group1; + int min_group2; + struct mthca_db_page *page; + struct semaphore mutex; +}; + +enum { + MTHCA_DB_TYPE_INVALID = 0x0, + MTHCA_DB_TYPE_CQ_SET_CI = 0x1, + MTHCA_DB_TYPE_CQ_ARM = 0x2, + MTHCA_DB_TYPE_SQ = 0x3, + MTHCA_DB_TYPE_RQ = 0x4, + MTHCA_DB_TYPE_SRQ = 0x5, + MTHCA_DB_TYPE_GROUP_SEP = 0x7 +}; + +int mthca_init_db_tab(struct mthca_dev *dev); +void mthca_cleanup_db_tab(struct mthca_dev *dev); +int mthca_alloc_db(struct mthca_dev *dev, int type, u32 qn, u32 **db); +void mthca_free_db(struct mthca_dev *dev, int type, int db_index); + +#endif /* MTHCA_MEMFREE_H */ |