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authorYevgeny Petrilin <yevgenyp@mellanox.co.il>2008-10-22 10:25:29 -0700
committerRoland Dreier <rolandd@cisco.com>2008-10-22 10:25:29 -0700
commit93fc9e1bb6507dde945c2eab68c93e1066ac3691 (patch)
treeaa495ec31b7372580f9ec50acead1d170fd70aab /drivers/net/mlx4/qp.c
parenta3cdcbfa8fb1fccfe48d359da86e99546610c562 (diff)
mlx4_core: Support multiple pre-reserved QP regions
For ethernet support, we need to reserve QPs for the ethernet and fibre channel driver. The QPs are reserved at the end of the QP table. (This way we assure that they are aligned to their size) We need to consider these reserved ranges in bitmap creation, so we extend the mlx4 bitmap utility functions to allow reserved ranges at both the bottom and the top of the range. Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/net/mlx4/qp.c')
-rw-r--r--drivers/net/mlx4/qp.c36
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/net/mlx4/qp.c b/drivers/net/mlx4/qp.c
index 98e0c40ba36..1c565ef8d17 100644
--- a/drivers/net/mlx4/qp.c
+++ b/drivers/net/mlx4/qp.c
@@ -272,6 +272,7 @@ int mlx4_init_qp_table(struct mlx4_dev *dev)
{
struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
int err;
+ int reserved_from_top = 0;
spin_lock_init(&qp_table->lock);
INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
@@ -281,9 +282,40 @@ int mlx4_init_qp_table(struct mlx4_dev *dev)
* block of special QPs must be aligned to a multiple of 8, so
* round up.
*/
- dev->caps.sqp_start = ALIGN(dev->caps.reserved_qps, 8);
+ dev->caps.sqp_start =
+ ALIGN(dev->caps.reserved_qps_cnt[MLX4_QP_REGION_FW], 8);
+
+ {
+ int sort[MLX4_NUM_QP_REGION];
+ int i, j, tmp;
+ int last_base = dev->caps.num_qps;
+
+ for (i = 1; i < MLX4_NUM_QP_REGION; ++i)
+ sort[i] = i;
+
+ for (i = MLX4_NUM_QP_REGION; i > 0; --i) {
+ for (j = 2; j < i; ++j) {
+ if (dev->caps.reserved_qps_cnt[sort[j]] >
+ dev->caps.reserved_qps_cnt[sort[j - 1]]) {
+ tmp = sort[j];
+ sort[j] = sort[j - 1];
+ sort[j - 1] = tmp;
+ }
+ }
+ }
+
+ for (i = 1; i < MLX4_NUM_QP_REGION; ++i) {
+ last_base -= dev->caps.reserved_qps_cnt[sort[i]];
+ dev->caps.reserved_qps_base[sort[i]] = last_base;
+ reserved_from_top +=
+ dev->caps.reserved_qps_cnt[sort[i]];
+ }
+
+ }
+
err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps,
- (1 << 24) - 1, dev->caps.sqp_start + 8);
+ (1 << 23) - 1, dev->caps.sqp_start + 8,
+ reserved_from_top);
if (err)
return err;