diff options
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_memfree.c')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_memfree.c | 34 |
1 files changed, 34 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) { |