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| author | Shrikrishna Khare <skhare@vmware.com> | 2016-06-16 10:51:55 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-16 22:37:04 -0700 |
| commit | 3c8b3efc061a745d888869dc3462ac4f7dd582d9 (patch) | |
| tree | 1149b4276b76ca224ee99ab78146e643d563bcfb /drivers/net/vmxnet3/vmxnet3_defs.h | |
| parent | f35c7480f81b70f9c3030d96a3807e8faba34cf7 (diff) | |
| download | linux-stable-3c8b3efc061a745d888869dc3462ac4f7dd582d9.tar.gz linux-stable-3c8b3efc061a745d888869dc3462ac4f7dd582d9.tar.bz2 linux-stable-3c8b3efc061a745d888869dc3462ac4f7dd582d9.zip | |
vmxnet3: allow variable length transmit data ring buffer
vmxnet3 driver supports transmit data ring viz. a set of fixed size
buffers used by the driver to copy packet headers. Small packets that
fit these buffers are copied into these buffers entirely.
Currently this buffer size of fixed at 128 bytes. This patch extends
transmit data ring implementation to allow variable length transmit
data ring buffers. The length of the buffer is read from the emulation
during initialization.
Signed-off-by: Sriram Rangarajan <rangarajans@vmware.com>
Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vmxnet3/vmxnet3_defs.h')
| -rw-r--r-- | drivers/net/vmxnet3/vmxnet3_defs.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_defs.h b/drivers/net/vmxnet3/vmxnet3_defs.h index a26a69df0e3d..701d98944c58 100644 --- a/drivers/net/vmxnet3/vmxnet3_defs.h +++ b/drivers/net/vmxnet3/vmxnet3_defs.h @@ -92,6 +92,7 @@ enum { VMXNET3_CMD_GET_DEV_EXTRA_INFO, VMXNET3_CMD_GET_CONF_INTR, VMXNET3_CMD_GET_RESERVED1, + VMXNET3_CMD_GET_TXDATA_DESC_SIZE }; /* @@ -377,6 +378,10 @@ union Vmxnet3_GenericDesc { #define VMXNET3_RING_SIZE_ALIGN 32 #define VMXNET3_RING_SIZE_MASK (VMXNET3_RING_SIZE_ALIGN - 1) +/* Tx Data Ring buffer size must be a multiple of 64 */ +#define VMXNET3_TXDATA_DESC_SIZE_ALIGN 64 +#define VMXNET3_TXDATA_DESC_SIZE_MASK (VMXNET3_TXDATA_DESC_SIZE_ALIGN - 1) + /* Max ring size */ #define VMXNET3_TX_RING_MAX_SIZE 4096 #define VMXNET3_TC_RING_MAX_SIZE 4096 @@ -384,6 +389,9 @@ union Vmxnet3_GenericDesc { #define VMXNET3_RX_RING2_MAX_SIZE 4096 #define VMXNET3_RC_RING_MAX_SIZE 8192 +#define VMXNET3_TXDATA_DESC_MIN_SIZE 128 +#define VMXNET3_TXDATA_DESC_MAX_SIZE 2048 + /* a list of reasons for queue stop */ enum { @@ -470,7 +478,9 @@ struct Vmxnet3_TxQueueConf { __le32 compRingSize; /* # of comp desc */ __le32 ddLen; /* size of driver data */ u8 intrIdx; - u8 _pad[7]; + u8 _pad1[1]; + __le16 txDataRingDescSize; + u8 _pad2[4]; }; |