Author: sbruno
Date: Fri Aug 25 22:38:55 2017
New Revision: 322906
URL: https://svnweb.freebsd.org/changeset/base/322906
Log:
Add a different #define for the maximum number of transmit and
recieve descriptors for the igb(4) class of devices. This will
allow a better definition for maximum going forward. Some igb(4)
devices support more than the default 4K.
Reported by: Jason (j...@nitrology.com)
Sponsored by: Limelight Networks
Modified:
head/sys/dev/e1000/if_em.c
head/sys/dev/e1000/if_em.h
Modified: head/sys/dev/e1000/if_em.c
==============================================================================
--- head/sys/dev/e1000/if_em.c Fri Aug 25 21:53:51 2017 (r322905)
+++ head/sys/dev/e1000/if_em.c Fri Aug 25 22:38:55 2017 (r322906)
@@ -515,8 +515,8 @@ static struct if_shared_ctx igb_sctx_init = {
.isc_nrxd_min = {EM_MIN_RXD},
.isc_ntxd_min = {EM_MIN_TXD},
- .isc_nrxd_max = {EM_MAX_RXD},
- .isc_ntxd_max = {EM_MAX_TXD},
+ .isc_nrxd_max = {IGB_MAX_RXD},
+ .isc_ntxd_max = {IGB_MAX_TXD},
.isc_nrxd_default = {EM_DEFAULT_RXD},
.isc_ntxd_default = {EM_DEFAULT_TXD},
};
Modified: head/sys/dev/e1000/if_em.h
==============================================================================
--- head/sys/dev/e1000/if_em.h Fri Aug 25 21:53:51 2017 (r322905)
+++ head/sys/dev/e1000/if_em.h Fri Aug 25 22:38:55 2017 (r322906)
@@ -96,10 +96,10 @@
/* Tunables */
/*
- * EM_TXD: Maximum number of Transmit Descriptors
+ * EM_MAX_TXD: Maximum number of Transmit Descriptors
* Valid Range: 80-256 for 82542 and 82543-based adapters
* 80-4096 for others
- * Default Value: 256
+ * Default Value: 1024
* This value is the number of transmit descriptors allocated by the driver.
* Increasing this value allows the driver to queue more transmits. Each
* descriptor is 16 bytes.
@@ -111,12 +111,13 @@
#define EM_MAX_TXD 4096
#define EM_DEFAULT_TXD 1024
#define EM_DEFAULT_MULTI_TXD 4096
+#define IGB_MAX_TXD 4096
/*
- * EM_RXD - Maximum number of receive Descriptors
+ * EM_MAX_RXD - Maximum number of receive Descriptors
* Valid Range: 80-256 for 82542 and 82543-based adapters
* 80-4096 for others
- * Default Value: 256
+ * Default Value: 1024
* This value is the number of receive descriptors allocated by the driver.
* Increasing this value allows the driver to buffer more incoming packets.
* Each descriptor is 16 bytes. A receive buffer is also allocated for each
@@ -129,6 +130,7 @@
#define EM_MAX_RXD 4096
#define EM_DEFAULT_RXD 1024
#define EM_DEFAULT_MULTI_RXD 4096
+#define IGB_MAX_RXD 4096
/*
* EM_TIDV - Transmit Interrupt Delay Value
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