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linuxdebug/drivers/net/ethernet/intel/ixgbevf/vf.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 1999 - 2018 Intel Corporation. */
#include "vf.h"
#include "ixgbevf.h"
/* On Hyper-V, to reset, we need to read from this offset
* from the PCI config space. This is the mechanism used on
* Hyper-V to support PF/VF communication.
*/
#define IXGBE_HV_RESET_OFFSET 0x201
static inline s32 ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, u32 *msg,
u32 *retmsg, u16 size)
{
s32 retval = ixgbevf_write_mbx(hw, msg, size);
if (retval)
return retval;
return ixgbevf_poll_mbx(hw, retmsg, size);
}
/**
* ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
* @hw: pointer to hardware structure
*
* Starts the hardware by filling the bus info structure and media type, clears
* all on chip counters, initializes receive address registers, multicast
* table, VLAN filter table, calls routine to set up link and flow control
* settings, and leaves transmit and receive units disabled and uninitialized
**/
static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
{
/* Clear adapter stopped flag */
hw->adapter_stopped = false;
return 0;
}
/**
* ixgbevf_init_hw_vf - virtual function hardware initialization
* @hw: pointer to hardware structure
*
* Initialize the hardware by resetting the hardware and then starting
* the hardware
**/
static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
{
s32 status = hw->mac.ops.start_hw(hw);
hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
return status;
}
/**
* ixgbevf_reset_hw_vf - Performs hardware reset
* @hw: pointer to hardware structure
*
* Resets the hardware by resetting the transmit and receive units, masks and
* clears all interrupts.
**/
static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
u32 timeout = IXGBE_VF_INIT_TIMEOUT;
u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
u8 *addr = (u8 *)(&msgbuf[1]);
s32 ret_val;
/* Call adapter stop to disable tx/rx and clear interrupts */
hw->mac.ops.stop_adapter(hw);
/* reset the api version */
hw->api_version = ixgbe_mbox_api_10;
hw->mbx.ops.init_params(hw);
memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops_legacy,
sizeof(struct ixgbe_mbx_operations));
IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
IXGBE_WRITE_FLUSH(hw);
/* we cannot reset while the RSTI / RSTD bits are asserted */
while (!mbx->ops.check_for_rst(hw) && timeout) {
timeout--;
udelay(5);
}
if (!timeout)
return IXGBE_ERR_RESET_FAILED;
/* mailbox timeout can now become active */
mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;
msgbuf[0] = IXGBE_VF_RESET;
ixgbevf_write_mbx(hw, msgbuf, 1);
mdelay(10);
/* set our "perm_addr" based on info provided by PF
* also set up the mc_filter_type which is piggy backed
* on the mac address in word 3
*/
ret_val = ixgbevf_poll_mbx(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
if (ret_val)
return ret_val;
/* New versions of the PF may NACK the reset return message
* to indicate that no MAC address has yet been assigned for
* the VF.
*/
if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_SUCCESS) &&
msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_FAILURE))
return IXGBE_ERR_INVALID_MAC_ADDR;
if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_SUCCESS))
ether_addr_copy(hw->mac.perm_addr, addr);
hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];
return 0;
}
/**
* ixgbevf_hv_reset_hw_vf - reset via Hyper-V
* @hw: pointer to private hardware struct
*
* Hyper-V variant; the VF/PF communication is through the PCI
* config space.
*/
static s32 ixgbevf_hv_reset_hw_vf(struct ixgbe_hw *hw)
{
#if IS_ENABLED(CONFIG_PCI_MMCONFIG)
struct ixgbevf_adapter *adapter = hw->back;
int i;
for (i = 0; i < 6; i++)
pci_read_config_byte(adapter->pdev,
(i + IXGBE_HV_RESET_OFFSET),
&hw->mac.perm_addr[i]);
return 0;
#else
pr_err("PCI_MMCONFIG needs to be enabled for Hyper-V\n");
return -EOPNOTSUPP;
#endif
}
/**
* ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
* @hw: pointer to hardware structure
*
* Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
* disables transmit and receive units. The adapter_stopped flag is used by
* the shared code and drivers to determine if the adapter is in a stopped
* state and should not touch the hardware.
**/
static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
{
u32 number_of_queues;
u32 reg_val;
u16 i;
/* Set the adapter_stopped flag so other driver functions stop touching
* the hardware
*/
hw->adapter_stopped = true;
/* Disable the receive unit by stopped each queue */
number_of_queues = hw->mac.max_rx_queues;
for (i = 0; i < number_of_queues; i++) {
reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
if (reg_val & IXGBE_RXDCTL_ENABLE) {
reg_val &= ~IXGBE_RXDCTL_ENABLE;
IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
}
}
IXGBE_WRITE_FLUSH(hw);
/* Clear interrupt mask to stop from interrupts being generated */
IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);
/* Clear any pending interrupts */
IXGBE_READ_REG(hw, IXGBE_VTEICR);
/* Disable the transmit unit. Each queue must be disabled. */
number_of_queues = hw->mac.max_tx_queues;
for (i = 0; i < number_of_queues; i++) {
reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
if (reg_val & IXGBE_TXDCTL_ENABLE) {
reg_val &= ~IXGBE_TXDCTL_ENABLE;
IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
}
}
return 0;
}
/**
* ixgbevf_mta_vector - Determines bit-vector in multicast table to set
* @hw: pointer to hardware structure
* @mc_addr: the multicast address
*
* Extracts the 12 bits, from a multicast address, to determine which
* bit-vector to set in the multicast table. The hardware uses 12 bits, from
* incoming Rx multicast addresses, to determine the bit-vector to check in
* the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
* by the MO field of the MCSTCTRL. The MO field is set during initialization
* to mc_filter_type.
**/
static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
{
u32 vector = 0;
switch (hw->mac.mc_filter_type) {
case 0: /* use bits [47:36] of the address */
vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
break;
case 1: /* use bits [46:35] of the address */
vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
break;
case 2: /* use bits [45:34] of the address */
vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
break;
case 3: /* use bits [43:32] of the address */
vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
break;
default: /* Invalid mc_filter_type */
break;
}
/* vector can only be 12-bits or boundary will be exceeded */
vector &= 0xFFF;
return vector;
}
/**
* ixgbevf_get_mac_addr_vf - Read device MAC address
* @hw: pointer to the HW structure
* @mac_addr: pointer to storage for retrieved MAC address
**/
static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
{
ether_addr_copy(mac_addr, hw->mac.perm_addr);
return 0;
}
static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
{
u32 msgbuf[3], msgbuf_chk;
u8 *msg_addr = (u8 *)(&msgbuf[1]);
s32 ret_val;
memset(msgbuf, 0, sizeof(msgbuf));
/* If index is one then this is the start of a new list and needs
* indication to the PF so it can do it's own list management.
* If it is zero then that tells the PF to just clear all of
* this VF's macvlans and there is no new list.
*/
msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
msgbuf_chk = msgbuf[0];
if (addr)
ether_addr_copy(msg_addr, addr);
ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
ARRAY_SIZE(msgbuf));
if (!ret_val) {
msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_FAILURE))
return -ENOMEM;
}
return ret_val;
}
static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
{
return -EOPNOTSUPP;
}
/**
* ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
* @hw: pointer to hardware structure
* @reta: buffer to fill with RETA contents.
* @num_rx_queues: Number of Rx queues configured for this port
*
* The "reta" buffer should be big enough to contain 32 registers.
*
* Returns: 0 on success.
* if API doesn't support this operation - (-EOPNOTSUPP).
*/
int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
{
int err, i, j;
u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
u32 *hw_reta = &msgbuf[1];
u32 mask = 0;
/* We have to use a mailbox for 82599 and x540 devices only.
* For these devices RETA has 128 entries.
* Also these VFs support up to 4 RSS queues. Therefore PF will compress
* 16 RETA entries in each DWORD giving 2 bits to each entry.
*/
int dwords = IXGBEVF_82599_RETA_SIZE / 16;
/* We support the RSS querying for 82599 and x540 devices only.
* Thus return an error if API doesn't support RETA querying or querying
* is not supported for this device type.
*/
switch (hw->api_version) {
case ixgbe_mbox_api_15:
case ixgbe_mbox_api_14:
case ixgbe_mbox_api_13:
case ixgbe_mbox_api_12:
if (hw->mac.type < ixgbe_mac_X550_vf)
break;
fallthrough;
default:
return -EOPNOTSUPP;
}
msgbuf[0] = IXGBE_VF_GET_RETA;
err = ixgbevf_write_mbx(hw, msgbuf, 1);
if (err)
return err;
err = ixgbevf_poll_mbx(hw, msgbuf, dwords + 1);
if (err)
return err;
msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
/* If the operation has been refused by a PF return -EPERM */
if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_FAILURE))
return -EPERM;
/* If we didn't get an ACK there must have been
* some sort of mailbox error so we should treat it
* as such.
*/
if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_SUCCESS))
return IXGBE_ERR_MBX;
/* ixgbevf doesn't support more than 2 queues at the moment */
if (num_rx_queues > 1)
mask = 0x1;
for (i = 0; i < dwords; i++)
for (j = 0; j < 16; j++)
reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;
return 0;
}
/**
* ixgbevf_get_rss_key_locked - get the RSS Random Key
* @hw: pointer to the HW structure
* @rss_key: buffer to fill with RSS Hash Key contents.
*
* The "rss_key" buffer should be big enough to contain 10 registers.
*
* Returns: 0 on success.
* if API doesn't support this operation - (-EOPNOTSUPP).
*/
int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
{
int err;
u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
/* We currently support the RSS Random Key retrieval for 82599 and x540
* devices only.
*
* Thus return an error if API doesn't support RSS Random Key retrieval
* or if the operation is not supported for this device type.
*/
switch (hw->api_version) {
case ixgbe_mbox_api_15:
case ixgbe_mbox_api_14:
case ixgbe_mbox_api_13:
case ixgbe_mbox_api_12:
if (hw->mac.type < ixgbe_mac_X550_vf)
break;
fallthrough;
default:
return -EOPNOTSUPP;
}
msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
err = ixgbevf_write_mbx(hw, msgbuf, 1);
if (err)
return err;
err = ixgbevf_poll_mbx(hw, msgbuf, 11);
if (err)
return err;
msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
/* If the operation has been refused by a PF return -EPERM */
if (msgbuf[0] == (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_FAILURE))
return -EPERM;
/* If we didn't get an ACK there must have been
* some sort of mailbox error so we should treat it
* as such.
*/
if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_SUCCESS))
return IXGBE_ERR_MBX;
memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);
return 0;
}
/**
* ixgbevf_set_rar_vf - set device MAC address
* @hw: pointer to hardware structure
* @index: Receive address register to write
* @addr: Address to put into receive address register
* @vmdq: Unused in this implementation
**/
static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
u32 vmdq)
{
u32 msgbuf[3];
u8 *msg_addr = (u8 *)(&msgbuf[1]);
s32 ret_val;
memset(msgbuf, 0, sizeof(msgbuf));
msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
ether_addr_copy(msg_addr, addr);
ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
ARRAY_SIZE(msgbuf));
msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
/* if nacked the address was rejected, use "perm_addr" */
if (!ret_val &&
(msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_FAILURE))) {
ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
return IXGBE_ERR_MBX;
}
return ret_val;
}
/**
* ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant
* @hw: pointer to hardware structure
* @index: Receive address register to write
* @addr: Address to put into receive address register
* @vmdq: Unused in this implementation
*
* We don't really allow setting the device MAC address. However,
* if the address being set is the permanent MAC address we will
* permit that.
**/
static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
u32 vmdq)
{
if (ether_addr_equal(addr, hw->mac.perm_addr))
return 0;
return -EOPNOTSUPP;
}
/**
* ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
* @hw: pointer to the HW structure
* @netdev: pointer to net device structure
*
* Updates the Multicast Table Array.
**/
static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
struct net_device *netdev)
{
struct netdev_hw_addr *ha;
u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
u16 *vector_list = (u16 *)&msgbuf[1];
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 = netdev_mc_count(netdev);
if (cnt > 30)
cnt = 30;
msgbuf[0] = IXGBE_VF_SET_MULTICAST;
msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;
i = 0;
netdev_for_each_mc_addr(ha, netdev) {
if (i == cnt)
break;
if (is_link_local_ether_addr(ha->addr))
continue;
vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
}
return ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
IXGBE_VFMAILBOX_SIZE);
}
/**
* ixgbevf_hv_update_mc_addr_list_vf - stub
* @hw: unused
* @netdev: unused
*
* Hyper-V variant - just a stub.
*/
static s32 ixgbevf_hv_update_mc_addr_list_vf(struct ixgbe_hw *hw,
struct net_device *netdev)
{
return -EOPNOTSUPP;
}
/**
* ixgbevf_update_xcast_mode - Update Multicast mode
* @hw: pointer to the HW structure
* @xcast_mode: new multicast mode
*
* Updates the Multicast Mode of VF.
**/
static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
{
u32 msgbuf[2];
s32 err;
switch (hw->api_version) {
case ixgbe_mbox_api_12:
/* promisc introduced in 1.3 version */
if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC)
return -EOPNOTSUPP;
fallthrough;
case ixgbe_mbox_api_13:
case ixgbe_mbox_api_14:
case ixgbe_mbox_api_15:
break;
default:
return -EOPNOTSUPP;
}
msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
msgbuf[1] = xcast_mode;
err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
ARRAY_SIZE(msgbuf));
if (err)
return err;
msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_FAILURE))
return -EPERM;
return 0;
}
/**
* ixgbevf_hv_update_xcast_mode - stub
* @hw: unused
* @xcast_mode: unused
*
* Hyper-V variant - just a stub.
*/
static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
{
return -EOPNOTSUPP;
}
/**
* ixgbevf_get_link_state_vf - Get VF link state from PF
* @hw: pointer to the HW structure
* @link_state: link state storage
*
* Returns state of the operation error or success.
*/
static s32 ixgbevf_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state)
{
u32 msgbuf[2];
s32 ret_val;
s32 err;
msgbuf[0] = IXGBE_VF_GET_LINK_STATE;
msgbuf[1] = 0x0;
err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
if (err || (msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE)) {
ret_val = IXGBE_ERR_MBX;
} else {
ret_val = 0;
*link_state = msgbuf[1];
}
return ret_val;
}
/**
* ixgbevf_hv_get_link_state_vf - * Hyper-V variant - just a stub.
* @hw: unused
* @link_state: unused
*
* Hyper-V variant; there is no mailbox communication.
*/
static s32 ixgbevf_hv_get_link_state_vf(struct ixgbe_hw *hw, bool *link_state)
{
return -EOPNOTSUPP;
}
/**
* ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
* @hw: pointer to the HW structure
* @vlan: 12 bit VLAN ID
* @vind: unused by VF drivers
* @vlan_on: if true then set bit, else clear bit
**/
static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
bool vlan_on)
{
u32 msgbuf[2];
s32 err;
msgbuf[0] = IXGBE_VF_SET_VLAN;
msgbuf[1] = vlan;
/* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;
err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
ARRAY_SIZE(msgbuf));
if (err)
goto mbx_err;
/* remove extra bits from the message */
msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);
if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_SUCCESS))
err = IXGBE_ERR_INVALID_ARGUMENT;
mbx_err:
return err;
}
/**
* ixgbevf_hv_set_vfta_vf - * Hyper-V variant - just a stub.
* @hw: unused
* @vlan: unused
* @vind: unused
* @vlan_on: unused
*/
static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
bool vlan_on)
{
return -EOPNOTSUPP;
}
/**
* ixgbevf_setup_mac_link_vf - Setup MAC link settings
* @hw: pointer to hardware structure
* @speed: Unused in this implementation
* @autoneg: Unused in this implementation
* @autoneg_wait_to_complete: Unused in this implementation
*
* Do nothing and return success. VF drivers are not allowed to change
* global settings. Maintained for driver compatibility.
**/
static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
ixgbe_link_speed speed, bool autoneg,
bool autoneg_wait_to_complete)
{
return 0;
}
/**
* ixgbevf_check_mac_link_vf - Get link/speed status
* @hw: pointer to hardware structure
* @speed: pointer to link speed
* @link_up: true is link is up, false otherwise
* @autoneg_wait_to_complete: unused
*
* Reads the links register to determine if link is up and the current speed
**/
static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
ixgbe_link_speed *speed,
bool *link_up,
bool autoneg_wait_to_complete)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
struct ixgbe_mac_info *mac = &hw->mac;
s32 ret_val = 0;
u32 links_reg;
u32 in_msg = 0;
/* If we were hit with a reset 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 */
links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
if (!(links_reg & IXGBE_LINKS_UP))
goto out;
/* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
* before the link status is correct
*/
if (mac->type == ixgbe_mac_82599_vf) {
int i;
for (i = 0; i < 5; i++) {
udelay(100);
links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
if (!(links_reg & IXGBE_LINKS_UP))
goto out;
}
}
switch (links_reg & IXGBE_LINKS_SPEED_82599) {
case IXGBE_LINKS_SPEED_10G_82599:
*speed = IXGBE_LINK_SPEED_10GB_FULL;
break;
case IXGBE_LINKS_SPEED_1G_82599:
*speed = IXGBE_LINK_SPEED_1GB_FULL;
break;
case IXGBE_LINKS_SPEED_100_82599:
*speed = IXGBE_LINK_SPEED_100_FULL;
break;
}
/* 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)) {
if (hw->api_version >= ixgbe_mbox_api_15)
mac->get_link_status = false;
goto out;
}
if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
/* msg is not CTS and is NACK we must have lost CTS status */
if (in_msg & IXGBE_VT_MSGTYPE_FAILURE)
ret_val = -1;
goto out;
}
/* the pf is talking, if we timed out in the past we reinit */
if (!mbx->timeout) {
ret_val = -1;
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:
*link_up = !mac->get_link_status;
return ret_val;
}
/**
* ixgbevf_hv_check_mac_link_vf - check link
* @hw: pointer to private hardware struct
* @speed: pointer to link speed
* @link_up: true is link is up, false otherwise
* @autoneg_wait_to_complete: unused
*
* Hyper-V variant; there is no mailbox communication.
*/
static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw,
ixgbe_link_speed *speed,
bool *link_up,
bool autoneg_wait_to_complete)
{
struct ixgbe_mbx_info *mbx = &hw->mbx;
struct ixgbe_mac_info *mac = &hw->mac;
u32 links_reg;
/* If we were hit with a reset 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 */
links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
if (!(links_reg & IXGBE_LINKS_UP))
goto out;
/* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
* before the link status is correct
*/
if (mac->type == ixgbe_mac_82599_vf) {
int i;
for (i = 0; i < 5; i++) {
udelay(100);
links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
if (!(links_reg & IXGBE_LINKS_UP))
goto out;
}
}
switch (links_reg & IXGBE_LINKS_SPEED_82599) {
case IXGBE_LINKS_SPEED_10G_82599:
*speed = IXGBE_LINK_SPEED_10GB_FULL;
break;
case IXGBE_LINKS_SPEED_1G_82599:
*speed = IXGBE_LINK_SPEED_1GB_FULL;
break;
case IXGBE_LINKS_SPEED_100_82599:
*speed = IXGBE_LINK_SPEED_100_FULL;
break;
}
/* 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:
*link_up = !mac->get_link_status;
return 0;
}
/**
* ixgbevf_set_rlpml_vf - Set the maximum receive packet length
* @hw: pointer to the HW structure
* @max_size: value to assign to max frame size
**/
static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
{
u32 msgbuf[2];
s32 ret_val;
msgbuf[0] = IXGBE_VF_SET_LPE;
msgbuf[1] = max_size;
ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
ARRAY_SIZE(msgbuf));
if (ret_val)
return ret_val;
if ((msgbuf[0] & IXGBE_VF_SET_LPE) &&
(msgbuf[0] & IXGBE_VT_MSGTYPE_FAILURE))
return IXGBE_ERR_MBX;
return 0;
}
/**
* ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
* @hw: pointer to the HW structure
* @max_size: value to assign to max frame size
* Hyper-V variant.
**/
static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
{
u32 reg;
/* If we are on Hyper-V, we implement this functionality
* differently.
*/
reg = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
/* CRC == 4 */
reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);
return 0;
}
/**
* ixgbevf_negotiate_api_version_vf - Negotiate supported API version
* @hw: pointer to the HW structure
* @api: integer containing requested API version
**/
static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
{
int err;
u32 msg[3];
/* Negotiate the mailbox API version */
msg[0] = IXGBE_VF_API_NEGOTIATE;
msg[1] = api;
msg[2] = 0;
err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
if (!err) {
msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
/* Store value and return 0 on success */
if (msg[0] == (IXGBE_VF_API_NEGOTIATE |
IXGBE_VT_MSGTYPE_SUCCESS)) {
hw->api_version = api;
return 0;
}
err = IXGBE_ERR_INVALID_ARGUMENT;
}
return err;
}
/**
* ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version
* @hw: pointer to the HW structure
* @api: integer containing requested API version
* Hyper-V version - only ixgbe_mbox_api_10 supported.
**/
static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
{
/* Hyper-V only supports api version ixgbe_mbox_api_10 */
if (api != ixgbe_mbox_api_10)
return IXGBE_ERR_INVALID_ARGUMENT;
return 0;
}
int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
unsigned int *default_tc)
{
int err;
u32 msg[5];
/* do nothing if API doesn't support ixgbevf_get_queues */
switch (hw->api_version) {
case ixgbe_mbox_api_11:
case ixgbe_mbox_api_12:
case ixgbe_mbox_api_13:
case ixgbe_mbox_api_14:
case ixgbe_mbox_api_15:
break;
default:
return 0;
}
/* Fetch queue configuration from the PF */
msg[0] = IXGBE_VF_GET_QUEUE;
msg[1] = msg[2] = msg[3] = msg[4] = 0;
err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
if (!err) {
msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;
/* if we didn't get an ACK there must have been
* some sort of mailbox error so we should treat it
* as such
*/
if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_SUCCESS))
return IXGBE_ERR_MBX;
/* record and validate values from message */
hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
if (hw->mac.max_tx_queues == 0 ||
hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;
hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
if (hw->mac.max_rx_queues == 0 ||
hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;
*num_tcs = msg[IXGBE_VF_TRANS_VLAN];
/* in case of unknown state assume we cannot tag frames */
if (*num_tcs > hw->mac.max_rx_queues)
*num_tcs = 1;
*default_tc = msg[IXGBE_VF_DEF_QUEUE];
/* default to queue 0 on out-of-bounds queue number */
if (*default_tc >= hw->mac.max_tx_queues)
*default_tc = 0;
}
return err;
}
static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
.init_hw = ixgbevf_init_hw_vf,
.reset_hw = ixgbevf_reset_hw_vf,
.start_hw = ixgbevf_start_hw_vf,
.get_mac_addr = ixgbevf_get_mac_addr_vf,
.stop_adapter = ixgbevf_stop_hw_vf,
.setup_link = ixgbevf_setup_mac_link_vf,
.check_link = ixgbevf_check_mac_link_vf,
.negotiate_api_version = ixgbevf_negotiate_api_version_vf,
.set_rar = ixgbevf_set_rar_vf,
.update_mc_addr_list = ixgbevf_update_mc_addr_list_vf,
.update_xcast_mode = ixgbevf_update_xcast_mode,
.get_link_state = ixgbevf_get_link_state_vf,
.set_uc_addr = ixgbevf_set_uc_addr_vf,
.set_vfta = ixgbevf_set_vfta_vf,
.set_rlpml = ixgbevf_set_rlpml_vf,
};
static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = {
.init_hw = ixgbevf_init_hw_vf,
.reset_hw = ixgbevf_hv_reset_hw_vf,
.start_hw = ixgbevf_start_hw_vf,
.get_mac_addr = ixgbevf_get_mac_addr_vf,
.stop_adapter = ixgbevf_stop_hw_vf,
.setup_link = ixgbevf_setup_mac_link_vf,
.check_link = ixgbevf_hv_check_mac_link_vf,
.negotiate_api_version = ixgbevf_hv_negotiate_api_version_vf,
.set_rar = ixgbevf_hv_set_rar_vf,
.update_mc_addr_list = ixgbevf_hv_update_mc_addr_list_vf,
.update_xcast_mode = ixgbevf_hv_update_xcast_mode,
.get_link_state = ixgbevf_hv_get_link_state_vf,
.set_uc_addr = ixgbevf_hv_set_uc_addr_vf,
.set_vfta = ixgbevf_hv_set_vfta_vf,
.set_rlpml = ixgbevf_hv_set_rlpml_vf,
};
const struct ixgbevf_info ixgbevf_82599_vf_info = {
.mac = ixgbe_mac_82599_vf,
.mac_ops = &ixgbevf_mac_ops,
};
const struct ixgbevf_info ixgbevf_82599_vf_hv_info = {
.mac = ixgbe_mac_82599_vf,
.mac_ops = &ixgbevf_hv_mac_ops,
};
const struct ixgbevf_info ixgbevf_X540_vf_info = {
.mac = ixgbe_mac_X540_vf,
.mac_ops = &ixgbevf_mac_ops,
};
const struct ixgbevf_info ixgbevf_X540_vf_hv_info = {
.mac = ixgbe_mac_X540_vf,
.mac_ops = &ixgbevf_hv_mac_ops,
};
const struct ixgbevf_info ixgbevf_X550_vf_info = {
.mac = ixgbe_mac_X550_vf,
.mac_ops = &ixgbevf_mac_ops,
};
const struct ixgbevf_info ixgbevf_X550_vf_hv_info = {
.mac = ixgbe_mac_X550_vf,
.mac_ops = &ixgbevf_hv_mac_ops,
};
const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
.mac = ixgbe_mac_X550EM_x_vf,
.mac_ops = &ixgbevf_mac_ops,
};
const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = {
.mac = ixgbe_mac_X550EM_x_vf,
.mac_ops = &ixgbevf_hv_mac_ops,
};
const struct ixgbevf_info ixgbevf_x550em_a_vf_info = {
.mac = ixgbe_mac_x550em_a_vf,
.mac_ops = &ixgbevf_mac_ops,
};