diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbevf/vf.c | 1018 |
1 files changed, 1018 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c new file mode 100644 index 000000000..bfe6dfcec --- /dev/null +++ b/drivers/net/ethernet/intel/ixgbevf/vf.c @@ -0,0 +1,1018 @@ +// 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) +{ + struct ixgbe_mbx_info *mbx = &hw->mbx; + s32 retval = mbx->ops.write_posted(hw, msg, size); + + if (retval) + return retval; + + return mbx->ops.read_posted(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; + s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR; + u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN]; + u8 *addr = (u8 *)(&msgbuf[1]); + + /* 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; + + 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; + mbx->ops.write_posted(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 = mbx->ops.read_posted(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_ACK) && + msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_NACK)) + return IXGBE_ERR_INVALID_MAC_ADDR; + + if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK)) + ether_addr_copy(hw->mac.perm_addr, addr); + + hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD]; + + return 0; +} + +/** + * Hyper-V variant; the VF/PF communication is through the PCI + * config space. + * @hw: pointer to private hardware struct + */ +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_NACK)) + 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_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 = hw->mbx.ops.write_posted(hw, msgbuf, 1); + + if (err) + return err; + + err = hw->mbx.ops.read_posted(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_NACK)) + 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_ACK)) + 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_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 = hw->mbx.ops.write_posted(hw, msgbuf, 1); + + if (err) + return err; + + err = hw->mbx.ops.read_posted(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_NACK)) + 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_ACK)) + 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_NACK))) { + 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); +} + +/** + * Hyper-V variant - just a stub. + * @hw: unused + * @netdev: unused + */ +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_14: + case ixgbe_mbox_api_13: + 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_NACK)) + return -EPERM; + + return 0; +} + +/** + * Hyper-V variant - just a stub. + * @hw: unused + * @xcast_mode: unused + */ +static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode) +{ + 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_ACK)) + err = IXGBE_ERR_INVALID_ARGUMENT; + +mbx_err: + return err; +} + +/** + * 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)) + 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_NACK) + 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; +} + +/** + * Hyper-V variant; there is no mailbox communication. + * @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 + */ +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_NACK)) + 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_ACK)) { + 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: + 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 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_ACK)) + 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, + .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, + .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, +}; 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