net/vmxnet3: return correct value for VMXNET3_CMD_GET_DID_* command
commitc469669ef7b4ee2ec1e0db0053ada6809c5b5f98
authorMiao Yan <yanmiaobest@gmail.com>
Wed, 23 Dec 2015 06:06:08 +0000 (22 22:06 -0800)
committerJason Wang <jasowang@redhat.com>
Mon, 11 Jan 2016 03:01:34 +0000 (11 11:01 +0800)
tree1eb7d86ac64471767d2875538c09677e5eb58c8d
parentfde58177aa112da377bbe1af71e0ec3ee7750196
net/vmxnet3: return correct value for VMXNET3_CMD_GET_DID_* command

VMXNET3_CMD_GET_DID_LO should return PCI ID of the device
and VMXNET3_CMD_GET_DID_HI should return vmxnet3 revision ID.

This behavior can be observed by the following steps:

1) run a Linux distro on esxi server (5.x+)
2) modify vmxnet3 Linux driver to read DID_HI and DID_LO:

  VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_DID_LO);
  lo =  VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);

  VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_DID_HI);
  high =  VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
  pr_info("vmxnet3 DID lo: 0x%x, high: 0x%x\n", lo, high);

The kernel log will have something like the following message:

  [ 7005.111170] vmxnet3 DID lo: 0x7b0, high: 0x1

Signed-off-by: Miao Yan <yanmiaobest@gmail.com>
Reviewed-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
hw/net/vmxnet3.c