git: 980e6b7fd537 - stable/13 - ixgbe: increase DCB BW calculation for MTU

The branch stable/13 has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=980e6b7fd537665a3ff72f1e03b2a902abf6b876

commit 980e6b7fd537665a3ff72f1e03b2a902abf6b876
Author:     Radoslaw Tyl <radoslawx.tyl@intel.com>
AuthorDate: 2024-09-20 02:42:39 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2024-09-27 03:38:50 +0000

    ixgbe: increase DCB BW calculation for MTU
    
    Change max credit and credit refill to a maximum possible value, 9128.
    Too small values cause the incorrect calculation of the bandwidth limits
    to each traffic class for frames larger than 4088 bytes.
    
    Signed-off-by: Radoslaw Tyl <radoslawx.tyl@intel.com>
    Reviewed-by: Piotr Skajewski <piotrx.skajewski@intel.com>
    Reviewed-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
    Reviewed-by: Alice Michael <alice.michael@intel.com>
    Tested-by: Piotr Skajewski <piotrx.skajewski@intel.com>
    
    Obtained from:  DPDK (440823f)
    
    (cherry picked from commit 1b80ac6fa64eaa575b99521cbd71a3780bf5139b)
---
 sys/dev/ixgbe/ixgbe_dcb.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/dev/ixgbe/ixgbe_dcb.h b/sys/dev/ixgbe/ixgbe_dcb.h
index b31dfae0cdfa..54decd4d081d 100644
--- a/sys/dev/ixgbe/ixgbe_dcb.h
+++ b/sys/dev/ixgbe/ixgbe_dcb.h
@@ -40,9 +40,9 @@
 /* DCB defines */
 /* DCB credit calculation defines */
 #define IXGBE_DCB_CREDIT_QUANTUM	64
-#define IXGBE_DCB_MAX_CREDIT_REFILL	200   /* 200 * 64B = 12800B */
+#define IXGBE_DCB_MAX_CREDIT_REFILL	511   /* 0x1FF * 64B = 32704B */
 #define IXGBE_DCB_MAX_TSO_SIZE		(32 * 1024) /* Max TSO pkt size in DCB*/
-#define IXGBE_DCB_MAX_CREDIT		(2 * IXGBE_DCB_MAX_CREDIT_REFILL)
+#define IXGBE_DCB_MAX_CREDIT		4095 /* Maximum credit supported: 256KB * 1024 / 64B */
 
 /* 513 for 32KB TSO packet */
 #define IXGBE_DCB_MIN_TSO_CREDIT	\