400 lines
12 KiB
C
400 lines
12 KiB
C
/*******************************************************************************
|
|
|
|
Intel(R) 82576 Virtual Function Linux driver
|
|
Copyright(c) 2009 - 2012 Intel Corporation.
|
|
|
|
This program is free software; you can redistribute it and/or modify it
|
|
under the terms and conditions of the GNU General Public License,
|
|
version 2, as published by the Free Software Foundation.
|
|
|
|
This program is distributed in the hope it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
The full GNU General Public License is included in this distribution in
|
|
the file called "COPYING".
|
|
|
|
Contact Information:
|
|
e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
|
|
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
|
|
|
|
*******************************************************************************/
|
|
|
|
|
|
#include "vf.h"
|
|
|
|
static s32 e1000_check_for_link_vf(struct e1000_hw *hw);
|
|
static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
|
|
u16 *duplex);
|
|
static s32 e1000_init_hw_vf(struct e1000_hw *hw);
|
|
static s32 e1000_reset_hw_vf(struct e1000_hw *hw);
|
|
|
|
static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *,
|
|
u32, u32, u32);
|
|
static void e1000_rar_set_vf(struct e1000_hw *, u8 *, u32);
|
|
static s32 e1000_read_mac_addr_vf(struct e1000_hw *);
|
|
static s32 e1000_set_vfta_vf(struct e1000_hw *, u16, bool);
|
|
|
|
/**
|
|
* e1000_init_mac_params_vf - Inits MAC params
|
|
* @hw: pointer to the HW structure
|
|
**/
|
|
static s32 e1000_init_mac_params_vf(struct e1000_hw *hw)
|
|
{
|
|
struct e1000_mac_info *mac = &hw->mac;
|
|
|
|
/* VF's have no MTA Registers - PF feature only */
|
|
mac->mta_reg_count = 128;
|
|
/* VF's have no access to RAR entries */
|
|
mac->rar_entry_count = 1;
|
|
|
|
/* Function pointers */
|
|
/* reset */
|
|
mac->ops.reset_hw = e1000_reset_hw_vf;
|
|
/* hw initialization */
|
|
mac->ops.init_hw = e1000_init_hw_vf;
|
|
/* check for link */
|
|
mac->ops.check_for_link = e1000_check_for_link_vf;
|
|
/* link info */
|
|
mac->ops.get_link_up_info = e1000_get_link_up_info_vf;
|
|
/* multicast address update */
|
|
mac->ops.update_mc_addr_list = e1000_update_mc_addr_list_vf;
|
|
/* set mac address */
|
|
mac->ops.rar_set = e1000_rar_set_vf;
|
|
/* read mac address */
|
|
mac->ops.read_mac_addr = e1000_read_mac_addr_vf;
|
|
/* set vlan filter table array */
|
|
mac->ops.set_vfta = e1000_set_vfta_vf;
|
|
|
|
return E1000_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* e1000_init_function_pointers_vf - Inits function pointers
|
|
* @hw: pointer to the HW structure
|
|
**/
|
|
void e1000_init_function_pointers_vf(struct e1000_hw *hw)
|
|
{
|
|
hw->mac.ops.init_params = e1000_init_mac_params_vf;
|
|
hw->mbx.ops.init_params = e1000_init_mbx_params_vf;
|
|
}
|
|
|
|
/**
|
|
* e1000_get_link_up_info_vf - Gets link info.
|
|
* @hw: pointer to the HW structure
|
|
* @speed: pointer to 16 bit value to store link speed.
|
|
* @duplex: pointer to 16 bit value to store duplex.
|
|
*
|
|
* Since we cannot read the PHY and get accurate link info, we must rely upon
|
|
* the status register's data which is often stale and inaccurate.
|
|
**/
|
|
static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
|
|
u16 *duplex)
|
|
{
|
|
s32 status;
|
|
|
|
status = er32(STATUS);
|
|
if (status & E1000_STATUS_SPEED_1000)
|
|
*speed = SPEED_1000;
|
|
else if (status & E1000_STATUS_SPEED_100)
|
|
*speed = SPEED_100;
|
|
else
|
|
*speed = SPEED_10;
|
|
|
|
if (status & E1000_STATUS_FD)
|
|
*duplex = FULL_DUPLEX;
|
|
else
|
|
*duplex = HALF_DUPLEX;
|
|
|
|
return E1000_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* e1000_reset_hw_vf - Resets the HW
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* VF's provide a function level reset. This is done using bit 26 of ctrl_reg.
|
|
* This is all the reset we can perform on a VF.
|
|
**/
|
|
static s32 e1000_reset_hw_vf(struct e1000_hw *hw)
|
|
{
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
|
u32 timeout = E1000_VF_INIT_TIMEOUT;
|
|
u32 ret_val = -E1000_ERR_MAC_INIT;
|
|
u32 msgbuf[3];
|
|
u8 *addr = (u8 *)(&msgbuf[1]);
|
|
u32 ctrl;
|
|
|
|
/* assert vf queue/interrupt reset */
|
|
ctrl = er32(CTRL);
|
|
ew32(CTRL, ctrl | E1000_CTRL_RST);
|
|
|
|
/* we cannot initialize while the RSTI / RSTD bits are asserted */
|
|
while (!mbx->ops.check_for_rst(hw) && timeout) {
|
|
timeout--;
|
|
udelay(5);
|
|
}
|
|
|
|
if (timeout) {
|
|
/* mailbox timeout can now become active */
|
|
mbx->timeout = E1000_VF_MBX_INIT_TIMEOUT;
|
|
|
|
/* notify pf of vf reset completion */
|
|
msgbuf[0] = E1000_VF_RESET;
|
|
mbx->ops.write_posted(hw, msgbuf, 1);
|
|
|
|
msleep(10);
|
|
|
|
/* set our "perm_addr" based on info provided by PF */
|
|
ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
|
|
if (!ret_val) {
|
|
if (msgbuf[0] == (E1000_VF_RESET | E1000_VT_MSGTYPE_ACK))
|
|
memcpy(hw->mac.perm_addr, addr, 6);
|
|
else
|
|
ret_val = -E1000_ERR_MAC_INIT;
|
|
}
|
|
}
|
|
|
|
return ret_val;
|
|
}
|
|
|
|
/**
|
|
* e1000_init_hw_vf - Inits the HW
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Not much to do here except clear the PF Reset indication if there is one.
|
|
**/
|
|
static s32 e1000_init_hw_vf(struct e1000_hw *hw)
|
|
{
|
|
/* attempt to set and restore our mac address */
|
|
e1000_rar_set_vf(hw, hw->mac.addr, 0);
|
|
|
|
return E1000_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* e1000_hash_mc_addr_vf - Generate a multicast hash value
|
|
* @hw: pointer to the HW structure
|
|
* @mc_addr: pointer to a multicast address
|
|
*
|
|
* Generates a multicast address hash value which is used to determine
|
|
* the multicast filter table array address and new table value. See
|
|
* e1000_mta_set_generic()
|
|
**/
|
|
static u32 e1000_hash_mc_addr_vf(struct e1000_hw *hw, u8 *mc_addr)
|
|
{
|
|
u32 hash_value, hash_mask;
|
|
u8 bit_shift = 0;
|
|
|
|
/* Register count multiplied by bits per register */
|
|
hash_mask = (hw->mac.mta_reg_count * 32) - 1;
|
|
|
|
/*
|
|
* The bit_shift is the number of left-shifts
|
|
* where 0xFF would still fall within the hash mask.
|
|
*/
|
|
while (hash_mask >> bit_shift != 0xFF)
|
|
bit_shift++;
|
|
|
|
hash_value = hash_mask & (((mc_addr[4] >> (8 - bit_shift)) |
|
|
(((u16) mc_addr[5]) << bit_shift)));
|
|
|
|
return hash_value;
|
|
}
|
|
|
|
/**
|
|
* e1000_update_mc_addr_list_vf - Update Multicast addresses
|
|
* @hw: pointer to the HW structure
|
|
* @mc_addr_list: array of multicast addresses to program
|
|
* @mc_addr_count: number of multicast addresses to program
|
|
* @rar_used_count: the first RAR register free to program
|
|
* @rar_count: total number of supported Receive Address Registers
|
|
*
|
|
* Updates the Receive Address Registers and Multicast Table Array.
|
|
* The caller must have a packed mc_addr_list of multicast addresses.
|
|
* The parameter rar_count will usually be hw->mac.rar_entry_count
|
|
* unless there are workarounds that change this.
|
|
**/
|
|
static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw,
|
|
u8 *mc_addr_list, u32 mc_addr_count,
|
|
u32 rar_used_count, u32 rar_count)
|
|
{
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
|
u32 msgbuf[E1000_VFMAILBOX_SIZE];
|
|
u16 *hash_list = (u16 *)&msgbuf[1];
|
|
u32 hash_value;
|
|
u32 cnt, i;
|
|
|
|
/* Each entry in the list uses 1 16 bit word. We have 30
|
|
* 16 bit words available in our HW msg buffer (minus 1 for the
|
|
* msg type). That's 30 hash values if we pack 'em right. If
|
|
* there are more than 30 MC addresses to add then punt the
|
|
* extras for now and then add code to handle more than 30 later.
|
|
* It would be unusual for a server to request that many multi-cast
|
|
* addresses except for in large enterprise network environments.
|
|
*/
|
|
|
|
cnt = (mc_addr_count > 30) ? 30 : mc_addr_count;
|
|
msgbuf[0] = E1000_VF_SET_MULTICAST;
|
|
msgbuf[0] |= cnt << E1000_VT_MSGINFO_SHIFT;
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
hash_value = e1000_hash_mc_addr_vf(hw, mc_addr_list);
|
|
hash_list[i] = hash_value & 0x0FFFF;
|
|
mc_addr_list += ETH_ALEN;
|
|
}
|
|
|
|
mbx->ops.write_posted(hw, msgbuf, E1000_VFMAILBOX_SIZE);
|
|
}
|
|
|
|
/**
|
|
* e1000_set_vfta_vf - Set/Unset vlan filter table address
|
|
* @hw: pointer to the HW structure
|
|
* @vid: determines the vfta register and bit to set/unset
|
|
* @set: if true then set bit, else clear bit
|
|
**/
|
|
static s32 e1000_set_vfta_vf(struct e1000_hw *hw, u16 vid, bool set)
|
|
{
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
|
u32 msgbuf[2];
|
|
s32 err;
|
|
|
|
msgbuf[0] = E1000_VF_SET_VLAN;
|
|
msgbuf[1] = vid;
|
|
/* Setting the 8 bit field MSG INFO to true indicates "add" */
|
|
if (set)
|
|
msgbuf[0] |= 1 << E1000_VT_MSGINFO_SHIFT;
|
|
|
|
mbx->ops.write_posted(hw, msgbuf, 2);
|
|
|
|
err = mbx->ops.read_posted(hw, msgbuf, 2);
|
|
|
|
msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
|
|
|
|
/* if nacked the vlan was rejected */
|
|
if (!err && (msgbuf[0] == (E1000_VF_SET_VLAN | E1000_VT_MSGTYPE_NACK)))
|
|
err = -E1000_ERR_MAC_INIT;
|
|
|
|
return err;
|
|
}
|
|
|
|
/** e1000_rlpml_set_vf - Set the maximum receive packet length
|
|
* @hw: pointer to the HW structure
|
|
* @max_size: value to assign to max frame size
|
|
**/
|
|
void e1000_rlpml_set_vf(struct e1000_hw *hw, u16 max_size)
|
|
{
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
|
u32 msgbuf[2];
|
|
|
|
msgbuf[0] = E1000_VF_SET_LPE;
|
|
msgbuf[1] = max_size;
|
|
|
|
mbx->ops.write_posted(hw, msgbuf, 2);
|
|
}
|
|
|
|
/**
|
|
* e1000_rar_set_vf - set device MAC address
|
|
* @hw: pointer to the HW structure
|
|
* @addr: pointer to the receive address
|
|
* @index receive address array register
|
|
**/
|
|
static void e1000_rar_set_vf(struct e1000_hw *hw, u8 * addr, u32 index)
|
|
{
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
|
u32 msgbuf[3];
|
|
u8 *msg_addr = (u8 *)(&msgbuf[1]);
|
|
s32 ret_val;
|
|
|
|
memset(msgbuf, 0, 12);
|
|
msgbuf[0] = E1000_VF_SET_MAC_ADDR;
|
|
memcpy(msg_addr, addr, 6);
|
|
ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
|
|
|
|
if (!ret_val)
|
|
ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
|
|
|
|
msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
|
|
|
|
/* if nacked the address was rejected, use "perm_addr" */
|
|
if (!ret_val &&
|
|
(msgbuf[0] == (E1000_VF_SET_MAC_ADDR | E1000_VT_MSGTYPE_NACK)))
|
|
e1000_read_mac_addr_vf(hw);
|
|
}
|
|
|
|
/**
|
|
* e1000_read_mac_addr_vf - Read device MAC address
|
|
* @hw: pointer to the HW structure
|
|
**/
|
|
static s32 e1000_read_mac_addr_vf(struct e1000_hw *hw)
|
|
{
|
|
memcpy(hw->mac.addr, hw->mac.perm_addr, ETH_ALEN);
|
|
|
|
return E1000_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* e1000_check_for_link_vf - Check for link for a virtual interface
|
|
* @hw: pointer to the HW structure
|
|
*
|
|
* Checks to see if the underlying PF is still talking to the VF and
|
|
* if it is then it reports the link state to the hardware, otherwise
|
|
* it reports link down and returns an error.
|
|
**/
|
|
static s32 e1000_check_for_link_vf(struct e1000_hw *hw)
|
|
{
|
|
struct e1000_mbx_info *mbx = &hw->mbx;
|
|
struct e1000_mac_info *mac = &hw->mac;
|
|
s32 ret_val = E1000_SUCCESS;
|
|
u32 in_msg = 0;
|
|
|
|
/*
|
|
* We only want to run this if there has been a rst asserted.
|
|
* in this case that could mean a link change, device reset,
|
|
* or a virtual function reset
|
|
*/
|
|
|
|
/* If we were hit with a reset or timeout drop the link */
|
|
if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
|
|
mac->get_link_status = true;
|
|
|
|
if (!mac->get_link_status)
|
|
goto out;
|
|
|
|
/* if link status is down no point in checking to see if pf is up */
|
|
if (!(er32(STATUS) & E1000_STATUS_LU))
|
|
goto out;
|
|
|
|
/* if the read failed it could just be a mailbox collision, best wait
|
|
* until we are called again and don't report an error */
|
|
if (mbx->ops.read(hw, &in_msg, 1))
|
|
goto out;
|
|
|
|
/* if incoming message isn't clear to send we are waiting on response */
|
|
if (!(in_msg & E1000_VT_MSGTYPE_CTS)) {
|
|
/* message is not CTS and is NACK we must have lost CTS status */
|
|
if (in_msg & E1000_VT_MSGTYPE_NACK)
|
|
ret_val = -E1000_ERR_MAC_INIT;
|
|
goto out;
|
|
}
|
|
|
|
/* the pf is talking, if we timed out in the past we reinit */
|
|
if (!mbx->timeout) {
|
|
ret_val = -E1000_ERR_MAC_INIT;
|
|
goto out;
|
|
}
|
|
|
|
/* if we passed all the tests above then the link is up and we no
|
|
* longer need to check for link */
|
|
mac->get_link_status = false;
|
|
|
|
out:
|
|
return ret_val;
|
|
}
|
|
|