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cxgbe: fix minimum descriptors requirement

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Most dpdk examples and apps seem to initialize with a minimum of 128 rx
descriptors and 512 tx descriptors for queue setup.  However, CXGBE PMD
enforces a minimum of 1024 descriptors.  This causes the dpdk stack
to return -EINVAL because the apps do not request the minimum required.

The fix is to relax this enforcing in CXGBE PMD. A minimum of 128
descriptors seems to be a good number with the least impact on the
performance.

Fixes: 946c9ed95616 ("cxgbe: get descriptor limits")

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
This commit is contained in:
Rahul Lakkireddy 2015-11-20 18:43:37 +05:30 committed by Thomas Monjalon
parent 4ba427971a
commit ca0481dade
1 changed files with 1 additions and 1 deletions
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2
drivers/net/cxgbe/cxgbe.h
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@ -37,7 +37,7 @@
#include "common.h"
#include "t4_regs.h"
#define CXGBE_MIN_RING_DESC_SIZE 1024 /* Min TX/RX descriptor ring size */
#define CXGBE_MIN_RING_DESC_SIZE 128 /* Min TX/RX descriptor ring size */
#define CXGBE_MAX_RING_DESC_SIZE 4096 /* Max TX/RX descriptor ring size */
#define CXGBE_DEFAULT_TX_DESC_SIZE 1024 /* Default TX ring size */