diff options
| author | Michael S. Tsirkin <mst@mellanox.co.il> | 2005-04-16 15:26:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:26:29 -0700 |
| commit | 0fabd9fb7bdc935f121e6950a2c4eff971dd4c75 (patch) | |
| tree | 2d3127501eb7ec1afcd88b071af5c53988cef132 /drivers | |
| parent | b8ca06f674ab5d7853d7de892c09bdc4c1bfb069 (diff) | |
[PATCH] IB/mthca: add mthca_table_find() function
Add mthca_table_find() function, which returns the lowmem address of an entry
in a mem-free HCA's context tables. This will be used by the FMR
implementation.
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_memfree.c | 34 | ||||
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_memfree.h | 1 |
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c index 46981d48c23..ea45de8c5b8 100644 --- a/drivers/infiniband/hw/mthca/mthca_memfree.c +++ b/drivers/infiniband/hw/mthca/mthca_memfree.c @@ -192,6 +192,40 @@ void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int o up(&table->mutex); } +void *mthca_table_find(struct mthca_icm_table *table, int obj) +{ + int idx, offset, i; + struct mthca_icm_chunk *chunk; + struct mthca_icm *icm; + struct page *page = NULL; + + if (!table->lowmem) + return NULL; + + down(&table->mutex); + + idx = (obj & (table->num_obj - 1)) * table->obj_size; + icm = table->icm[idx / MTHCA_TABLE_CHUNK_SIZE]; + offset = idx % MTHCA_TABLE_CHUNK_SIZE; + + if (!icm) + goto out; + + list_for_each_entry(chunk, &icm->chunk_list, list) { + for (i = 0; i < chunk->npages; ++i) { + if (chunk->mem[i].length >= offset) { + page = chunk->mem[i].page; + break; + } + offset -= chunk->mem[i].length; + } + } + +out: + up(&table->mutex); + return page ? lowmem_page_address(page) + offset : NULL; +} + int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table, int start, int end) { diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.h b/drivers/infiniband/hw/mthca/mthca_memfree.h index ef72e430250..fe7be2a6bc4 100644 --- a/drivers/infiniband/hw/mthca/mthca_memfree.h +++ b/drivers/infiniband/hw/mthca/mthca_memfree.h @@ -85,6 +85,7 @@ struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev, 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); +void *mthca_table_find(struct mthca_icm_table *table, int obj); int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table, int start, int end); void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table, |