* $Id$
*/
+#include <linux/mm.h>
+
#include "mthca_memfree.h"
#include "mthca_dev.h"
#include "mthca_cmd.h"
if (!icm)
return icm;
+ icm->refcount = 0;
INIT_LIST_HEAD(&icm->chunk_list);
cur_order = get_order(MTHCA_ICM_ALLOC_SIZE);
return NULL;
}
+int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj)
+{
+ int i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE;
+ int ret = 0;
+ u8 status;
+
+ down(&table->mutex);
+
+ if (table->icm[i]) {
+ ++table->icm[i]->refcount;
+ goto out;
+ }
+
+ table->icm[i] = mthca_alloc_icm(dev, MTHCA_TABLE_CHUNK_SIZE >> PAGE_SHIFT,
+ (table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
+ __GFP_NOWARN);
+ if (!table->icm[i]) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (mthca_MAP_ICM(dev, table->icm[i], table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
+ &status) || status) {
+ mthca_free_icm(dev, table->icm[i]);
+ table->icm[i] = NULL;
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ++table->icm[i]->refcount;
+
+out:
+ up(&table->mutex);
+ return ret;
+}
+
+void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj)
+{
+ int i = (obj & (table->num_obj - 1)) * table->obj_size / MTHCA_TABLE_CHUNK_SIZE;
+ u8 status;
+
+ down(&table->mutex);
+
+ if (--table->icm[i]->refcount == 0) {
+ mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
+ MTHCA_TABLE_CHUNK_SIZE >> 12, &status);
+ mthca_free_icm(dev, table->icm[i]);
+ table->icm[i] = NULL;
+ }
+
+ 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)
+{
+ int inc = MTHCA_TABLE_CHUNK_SIZE / table->obj_size;
+ int i, err;
+
+ for (i = start; i <= end; i += inc) {
+ err = mthca_table_get(dev, table, i);
+ if (err)
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ while (i > start) {
+ i -= inc;
+ mthca_table_put(dev, table, i);
+ }
+
+ return err;
+}
+
+void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
+ int start, int end)
+{
+ int i;
+
+ for (i = start; i <= end; i += MTHCA_TABLE_CHUNK_SIZE / table->obj_size)
+ mthca_table_put(dev, table, i);
+}
+
struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
- u64 virt, unsigned size,
- unsigned reserved,
+ u64 virt, int obj_size,
+ int nobj, int reserved,
int use_lowmem)
{
struct mthca_icm_table *table;
int i;
u8 status;
- num_icm = size / MTHCA_TABLE_CHUNK_SIZE;
+ num_icm = obj_size * nobj / MTHCA_TABLE_CHUNK_SIZE;
table = kmalloc(sizeof *table + num_icm * sizeof *table->icm, GFP_KERNEL);
if (!table)
return NULL;
- table->virt = virt;
- table->num_icm = num_icm;
- init_MUTEX(&table->sem);
+ table->virt = virt;
+ table->num_icm = num_icm;
+ table->num_obj = nobj;
+ table->obj_size = obj_size;
+ table->lowmem = use_lowmem;
+ init_MUTEX(&table->mutex);
for (i = 0; i < num_icm; ++i)
table->icm[i] = NULL;
- for (i = 0; i < (reserved + MTHCA_TABLE_CHUNK_SIZE - 1) / MTHCA_TABLE_CHUNK_SIZE; ++i) {
+ for (i = 0; i * MTHCA_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) {
table->icm[i] = mthca_alloc_icm(dev, MTHCA_TABLE_CHUNK_SIZE >> PAGE_SHIFT,
(use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
__GFP_NOWARN);
table->icm[i] = NULL;
goto err;
}
+
+ /*
+ * Add a reference to this ICM chunk so that it never
+ * gets freed (since it contains reserved firmware objects).
+ */
+ ++table->icm[i]->refcount;
}
return table;
kfree(table);
}
+
+static u64 mthca_uarc_virt(struct mthca_dev *dev, int page)
+{
+ return dev->uar_table.uarc_base +
+ dev->driver_uar.index * dev->uar_table.uarc_size +
+ page * 4096;
+}
+
+int mthca_alloc_db(struct mthca_dev *dev, int type, u32 qn, u32 **db)
+{
+ int group;
+ int start, end, dir;
+ int i, j;
+ struct mthca_db_page *page;
+ int ret = 0;
+ u8 status;
+
+ down(&dev->db_tab->mutex);
+
+ switch (type) {
+ case MTHCA_DB_TYPE_CQ_ARM:
+ case MTHCA_DB_TYPE_SQ:
+ group = 0;
+ start = 0;
+ end = dev->db_tab->max_group1;
+ dir = 1;
+ break;
+
+ case MTHCA_DB_TYPE_CQ_SET_CI:
+ case MTHCA_DB_TYPE_RQ:
+ case MTHCA_DB_TYPE_SRQ:
+ group = 1;
+ start = dev->db_tab->npages - 1;
+ end = dev->db_tab->min_group2;
+ dir = -1;
+ break;
+
+ default:
+ ret = -EINVAL;
+ goto out;
+ }
+
+ for (i = start; i != end; i += dir)
+ if (dev->db_tab->page[i].db_rec &&
+ !bitmap_full(dev->db_tab->page[i].used,
+ MTHCA_DB_REC_PER_PAGE)) {
+ page = dev->db_tab->page + i;
+ goto found;
+ }
+
+ if (dev->db_tab->max_group1 >= dev->db_tab->min_group2 - 1) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ page = dev->db_tab->page + end;
+ page->db_rec = dma_alloc_coherent(&dev->pdev->dev, 4096,
+ &page->mapping, GFP_KERNEL);
+ if (!page->db_rec) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ memset(page->db_rec, 0, 4096);
+
+ ret = mthca_MAP_ICM_page(dev, page->mapping, mthca_uarc_virt(dev, i), &status);
+ if (!ret && status)
+ ret = -EINVAL;
+ if (ret) {
+ dma_free_coherent(&dev->pdev->dev, 4096,
+ page->db_rec, page->mapping);
+ goto out;
+ }
+
+ bitmap_zero(page->used, MTHCA_DB_REC_PER_PAGE);
+ if (group == 0)
+ ++dev->db_tab->max_group1;
+ else
+ --dev->db_tab->min_group2;
+
+found:
+ j = find_first_zero_bit(page->used, MTHCA_DB_REC_PER_PAGE);
+ set_bit(j, page->used);
+
+ if (group == 1)
+ j = MTHCA_DB_REC_PER_PAGE - 1 - j;
+
+ ret = i * MTHCA_DB_REC_PER_PAGE + j;
+
+ page->db_rec[j] = cpu_to_be64((qn << 8) | (type << 5));
+
+ *db = (u32 *) &page->db_rec[j];
+
+out:
+ up(&dev->db_tab->mutex);
+
+ return ret;
+}
+
+void mthca_free_db(struct mthca_dev *dev, int type, int db_index)
+{
+ int i, j;
+ struct mthca_db_page *page;
+ u8 status;
+
+ i = db_index / MTHCA_DB_REC_PER_PAGE;
+ j = db_index % MTHCA_DB_REC_PER_PAGE;
+
+ page = dev->db_tab->page + i;
+
+ down(&dev->db_tab->mutex);
+
+ page->db_rec[j] = 0;
+ if (i >= dev->db_tab->min_group2)
+ j = MTHCA_DB_REC_PER_PAGE - 1 - j;
+ clear_bit(j, page->used);
+
+ if (bitmap_empty(page->used, MTHCA_DB_REC_PER_PAGE) &&
+ i >= dev->db_tab->max_group1 - 1) {
+ mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, i), 1, &status);
+
+ dma_free_coherent(&dev->pdev->dev, 4096,
+ page->db_rec, page->mapping);
+ page->db_rec = NULL;
+
+ if (i == dev->db_tab->max_group1) {
+ --dev->db_tab->max_group1;
+ /* XXX may be able to unmap more pages now */
+ }
+ if (i == dev->db_tab->min_group2)
+ ++dev->db_tab->min_group2;
+ }
+
+ up(&dev->db_tab->mutex);
+}
+
+int mthca_init_db_tab(struct mthca_dev *dev)
+{
+ int i;
+
+ if (!mthca_is_memfree(dev))
+ return 0;
+
+ dev->db_tab = kmalloc(sizeof *dev->db_tab, GFP_KERNEL);
+ if (!dev->db_tab)
+ return -ENOMEM;
+
+ init_MUTEX(&dev->db_tab->mutex);
+
+ dev->db_tab->npages = dev->uar_table.uarc_size / 4096;
+ dev->db_tab->max_group1 = 0;
+ dev->db_tab->min_group2 = dev->db_tab->npages - 1;
+
+ dev->db_tab->page = kmalloc(dev->db_tab->npages *
+ sizeof *dev->db_tab->page,
+ GFP_KERNEL);
+ if (!dev->db_tab->page) {
+ kfree(dev->db_tab);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < dev->db_tab->npages; ++i)
+ dev->db_tab->page[i].db_rec = NULL;
+
+ return 0;
+}
+
+void mthca_cleanup_db_tab(struct mthca_dev *dev)
+{
+ int i;
+ u8 status;
+
+ if (!mthca_is_memfree(dev))
+ return;
+
+ /*
+ * Because we don't always free our UARC pages when they
+ * become empty to make mthca_free_db() simpler we need to
+ * make a sweep through the doorbell pages and free any
+ * leftover pages now.
+ */
+ for (i = 0; i < dev->db_tab->npages; ++i) {
+ if (!dev->db_tab->page[i].db_rec)
+ continue;
+
+ if (!bitmap_empty(dev->db_tab->page[i].used, MTHCA_DB_REC_PER_PAGE))
+ mthca_warn(dev, "Kernel UARC page %d not empty\n", i);
+
+ mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, i), 1, &status);
+
+ dma_free_coherent(&dev->pdev->dev, 4096,
+ dev->db_tab->page[i].db_rec,
+ dev->db_tab->page[i].mapping);
+ }
+
+ kfree(dev->db_tab->page);
+ kfree(dev->db_tab);
+}
git://git.onelab.eu / linux-2.6.git / blobdiff