From d1e2d9660e6bca2f06606b4bc65ea669bf669b0a Mon Sep 17 00:00:00 2001 From: Ariel Elior Date: Thu, 26 Jan 2012 06:01:49 +0000 Subject: bnx2x: Loaded Firmware Version Validation In a virtualized environment it is possible for a loading driver to discover that Firmware is already loaded to the device, and that this FW does not match its own. This can happen for example if different Physical Functions are Assigned to different VMs in which different driver versions are loaded. The code in this patch ensures that only drivers with matching FW are loaded over the device, and that in the case described above where the Firmware version doesn't match the driver load is aborted. Signed-off-by: Ariel Elior Signed-off-by: Eilon Greenstein Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c index 03f3935fd8c2..b75c8eab095c 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c @@ -1783,6 +1783,29 @@ int bnx2x_nic_load(struct bnx2x *bp, int load_mode) rc = -EBUSY; /* other port in diagnostic mode */ LOAD_ERROR_EXIT(bp, load_error1); } + if (load_code != FW_MSG_CODE_DRV_LOAD_COMMON_CHIP && + load_code != FW_MSG_CODE_DRV_LOAD_COMMON) { + /* build FW version dword */ + u32 my_fw = (BCM_5710_FW_MAJOR_VERSION) + + (BCM_5710_FW_MINOR_VERSION << 8) + + (BCM_5710_FW_REVISION_VERSION << 16) + + (BCM_5710_FW_ENGINEERING_VERSION << 24); + + /* read loaded FW from chip */ + u32 loaded_fw = REG_RD(bp, XSEM_REG_PRAM); + + DP(BNX2X_MSG_SP, "loaded fw %x, my fw %x", + loaded_fw, my_fw); + + /* abort nic load if version mismatch */ + if (my_fw != loaded_fw) { + BNX2X_ERR("bnx2x with FW %x already loaded, " + "which mismatches my %x FW. aborting", + loaded_fw, my_fw); + rc = -EBUSY; + LOAD_ERROR_EXIT(bp, load_error2); + } + } } else { int path = BP_PATH(bp); -- cgit v1.2.2