+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*******************************************************************************
-
- Intel(R) Gigabit Ethernet Linux driver
- Copyright(c) 2007-2013 Intel Corporation.
-
- Contact Information:
- e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
- Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
-
-*******************************************************************************/
-
-#include "e1000_mbx.h"
-
-/**
- * e1000_null_mbx_check_for_flag - No-op function, return 0
- * @hw: pointer to the HW structure
- **/
-static s32 e1000_null_mbx_check_for_flag(struct e1000_hw E1000_UNUSEDARG *hw,
- u16 E1000_UNUSEDARG mbx_id)
-{
- DEBUGFUNC("e1000_null_mbx_check_flag");
-
- return E1000_SUCCESS;
-}
-
-/**
- * e1000_null_mbx_transact - No-op function, return 0
- * @hw: pointer to the HW structure
- **/
-static s32 e1000_null_mbx_transact(struct e1000_hw E1000_UNUSEDARG *hw,
- u32 E1000_UNUSEDARG *msg,
- u16 E1000_UNUSEDARG size,
- u16 E1000_UNUSEDARG mbx_id)
-{
- DEBUGFUNC("e1000_null_mbx_rw_msg");
-
- return E1000_SUCCESS;
-}
-
-/**
- * e1000_read_mbx - Reads a message from the mailbox
- * @hw: pointer to the HW structure
- * @msg: The message buffer
- * @size: Length of buffer
- * @mbx_id: id of mailbox to read
- *
- * returns SUCCESS if it successfully read message from buffer
- **/
-s32 e1000_read_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_read_mbx");
-
- /* limit read to size of mailbox */
- if (size > mbx->size)
- size = mbx->size;
-
- if (mbx->ops.read)
- ret_val = mbx->ops.read(hw, msg, size, mbx_id);
-
- return ret_val;
-}
-
-/**
- * e1000_write_mbx - Write a message to the mailbox
- * @hw: pointer to the HW structure
- * @msg: The message buffer
- * @size: Length of buffer
- * @mbx_id: id of mailbox to write
- *
- * returns SUCCESS if it successfully copied message into the buffer
- **/
-s32 e1000_write_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- s32 ret_val = E1000_SUCCESS;
-
- DEBUGFUNC("e1000_write_mbx");
-
- if (size > mbx->size)
- ret_val = -E1000_ERR_MBX;
-
- else if (mbx->ops.write)
- ret_val = mbx->ops.write(hw, msg, size, mbx_id);
-
- return ret_val;
-}
-
-/**
- * e1000_check_for_msg - checks to see if someone sent us mail
- * @hw: pointer to the HW structure
- * @mbx_id: id of mailbox to check
- *
- * returns SUCCESS if the Status bit was found or else ERR_MBX
- **/
-s32 e1000_check_for_msg(struct e1000_hw *hw, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_check_for_msg");
-
- if (mbx->ops.check_for_msg)
- ret_val = mbx->ops.check_for_msg(hw, mbx_id);
-
- return ret_val;
-}
-
-/**
- * e1000_check_for_ack - checks to see if someone sent us ACK
- * @hw: pointer to the HW structure
- * @mbx_id: id of mailbox to check
- *
- * returns SUCCESS if the Status bit was found or else ERR_MBX
- **/
-s32 e1000_check_for_ack(struct e1000_hw *hw, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_check_for_ack");
-
- if (mbx->ops.check_for_ack)
- ret_val = mbx->ops.check_for_ack(hw, mbx_id);
-
- return ret_val;
-}
-
-/**
- * e1000_check_for_rst - checks to see if other side has reset
- * @hw: pointer to the HW structure
- * @mbx_id: id of mailbox to check
- *
- * returns SUCCESS if the Status bit was found or else ERR_MBX
- **/
-s32 e1000_check_for_rst(struct e1000_hw *hw, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_check_for_rst");
-
- if (mbx->ops.check_for_rst)
- ret_val = mbx->ops.check_for_rst(hw, mbx_id);
-
- return ret_val;
-}
-
-/**
- * e1000_poll_for_msg - Wait for message notification
- * @hw: pointer to the HW structure
- * @mbx_id: id of mailbox to write
- *
- * returns SUCCESS if it successfully received a message notification
- **/
-static s32 e1000_poll_for_msg(struct e1000_hw *hw, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- int countdown = mbx->timeout;
-
- DEBUGFUNC("e1000_poll_for_msg");
-
- if (!countdown || !mbx->ops.check_for_msg)
- goto out;
-
- while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) {
- countdown--;
- if (!countdown)
- break;
- usec_delay(mbx->usec_delay);
- }
-
- /* if we failed, all future posted messages fail until reset */
- if (!countdown)
- mbx->timeout = 0;
-out:
- return countdown ? E1000_SUCCESS : -E1000_ERR_MBX;
-}
-
-/**
- * e1000_poll_for_ack - Wait for message acknowledgement
- * @hw: pointer to the HW structure
- * @mbx_id: id of mailbox to write
- *
- * returns SUCCESS if it successfully received a message acknowledgement
- **/
-static s32 e1000_poll_for_ack(struct e1000_hw *hw, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- int countdown = mbx->timeout;
-
- DEBUGFUNC("e1000_poll_for_ack");
-
- if (!countdown || !mbx->ops.check_for_ack)
- goto out;
-
- while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) {
- countdown--;
- if (!countdown)
- break;
- usec_delay(mbx->usec_delay);
- }
-
- /* if we failed, all future posted messages fail until reset */
- if (!countdown)
- mbx->timeout = 0;
-out:
- return countdown ? E1000_SUCCESS : -E1000_ERR_MBX;
-}
-
-/**
- * e1000_read_posted_mbx - Wait for message notification and receive message
- * @hw: pointer to the HW structure
- * @msg: The message buffer
- * @size: Length of buffer
- * @mbx_id: id of mailbox to write
- *
- * returns SUCCESS if it successfully received a message notification and
- * copied it into the receive buffer.
- **/
-s32 e1000_read_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_read_posted_mbx");
-
- if (!mbx->ops.read)
- goto out;
-
- ret_val = e1000_poll_for_msg(hw, mbx_id);
-
- /* if ack received read message, otherwise we timed out */
- if (!ret_val)
- ret_val = mbx->ops.read(hw, msg, size, mbx_id);
-out:
- return ret_val;
-}
-
-/**
- * e1000_write_posted_mbx - Write a message to the mailbox, wait for ack
- * @hw: pointer to the HW structure
- * @msg: The message buffer
- * @size: Length of buffer
- * @mbx_id: id of mailbox to write
- *
- * returns SUCCESS if it successfully copied message into the buffer and
- * received an ack to that message within delay * timeout period
- **/
-s32 e1000_write_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_write_posted_mbx");
-
- /* exit if either we can't write or there isn't a defined timeout */
- if (!mbx->ops.write || !mbx->timeout)
- goto out;
-
- /* send msg */
- ret_val = mbx->ops.write(hw, msg, size, mbx_id);
-
- /* if msg sent wait until we receive an ack */
- if (!ret_val)
- ret_val = e1000_poll_for_ack(hw, mbx_id);
-out:
- return ret_val;
-}
-
-/**
- * e1000_init_mbx_ops_generic - Initialize mbx function pointers
- * @hw: pointer to the HW structure
- *
- * Sets the function pointers to no-op functions
- **/
-void e1000_init_mbx_ops_generic(struct e1000_hw *hw)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
- mbx->ops.init_params = e1000_null_ops_generic;
- mbx->ops.read = e1000_null_mbx_transact;
- mbx->ops.write = e1000_null_mbx_transact;
- mbx->ops.check_for_msg = e1000_null_mbx_check_for_flag;
- mbx->ops.check_for_ack = e1000_null_mbx_check_for_flag;
- mbx->ops.check_for_rst = e1000_null_mbx_check_for_flag;
- mbx->ops.read_posted = e1000_read_posted_mbx;
- mbx->ops.write_posted = e1000_write_posted_mbx;
-}
-
-static s32 e1000_check_for_bit_pf(struct e1000_hw *hw, u32 mask)
-{
- u32 mbvficr = E1000_READ_REG(hw, E1000_MBVFICR);
- s32 ret_val = -E1000_ERR_MBX;
-
- if (mbvficr & mask) {
- ret_val = E1000_SUCCESS;
- E1000_WRITE_REG(hw, E1000_MBVFICR, mask);
- }
-
- return ret_val;
-}
-
-/**
- * e1000_check_for_msg_pf - checks to see if the VF has sent mail
- * @hw: pointer to the HW structure
- * @vf_number: the VF index
- *
- * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
- **/
-static s32 e1000_check_for_msg_pf(struct e1000_hw *hw, u16 vf_number)
-{
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_check_for_msg_pf");
-
- if (!e1000_check_for_bit_pf(hw, E1000_MBVFICR_VFREQ_VF1 << vf_number)) {
- ret_val = E1000_SUCCESS;
- hw->mbx.stats.reqs++;
- }
-
- return ret_val;
-}
-
-/**
- * e1000_check_for_ack_pf - checks to see if the VF has ACKed
- * @hw: pointer to the HW structure
- * @vf_number: the VF index
- *
- * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
- **/
-static s32 e1000_check_for_ack_pf(struct e1000_hw *hw, u16 vf_number)
-{
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_check_for_ack_pf");
-
- if (!e1000_check_for_bit_pf(hw, E1000_MBVFICR_VFACK_VF1 << vf_number)) {
- ret_val = E1000_SUCCESS;
- hw->mbx.stats.acks++;
- }
-
- return ret_val;
-}
-
-/**
- * e1000_check_for_rst_pf - checks to see if the VF has reset
- * @hw: pointer to the HW structure
- * @vf_number: the VF index
- *
- * returns SUCCESS if the VF has set the Status bit or else ERR_MBX
- **/
-static s32 e1000_check_for_rst_pf(struct e1000_hw *hw, u16 vf_number)
-{
- u32 vflre = E1000_READ_REG(hw, E1000_VFLRE);
- s32 ret_val = -E1000_ERR_MBX;
-
- DEBUGFUNC("e1000_check_for_rst_pf");
-
- if (vflre & (1 << vf_number)) {
- ret_val = E1000_SUCCESS;
- E1000_WRITE_REG(hw, E1000_VFLRE, (1 << vf_number));
- hw->mbx.stats.rsts++;
- }
-
- return ret_val;
-}
-
-/**
- * e1000_obtain_mbx_lock_pf - obtain mailbox lock
- * @hw: pointer to the HW structure
- * @vf_number: the VF index
- *
- * return SUCCESS if we obtained the mailbox lock
- **/
-static s32 e1000_obtain_mbx_lock_pf(struct e1000_hw *hw, u16 vf_number)
-{
- s32 ret_val = -E1000_ERR_MBX;
- u32 p2v_mailbox;
-
- DEBUGFUNC("e1000_obtain_mbx_lock_pf");
-
- /* Take ownership of the buffer */
- E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_PFU);
-
- /* reserve mailbox for vf use */
- p2v_mailbox = E1000_READ_REG(hw, E1000_P2VMAILBOX(vf_number));
- if (p2v_mailbox & E1000_P2VMAILBOX_PFU)
- ret_val = E1000_SUCCESS;
-
- return ret_val;
-}
-
-/**
- * e1000_write_mbx_pf - Places a message in the mailbox
- * @hw: pointer to the HW structure
- * @msg: The message buffer
- * @size: Length of buffer
- * @vf_number: the VF index
- *
- * returns SUCCESS if it successfully copied message into the buffer
- **/
-static s32 e1000_write_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size,
- u16 vf_number)
-{
- s32 ret_val;
- u16 i;
-
- DEBUGFUNC("e1000_write_mbx_pf");
-
- /* lock the mailbox to prevent pf/vf race condition */
- ret_val = e1000_obtain_mbx_lock_pf(hw, vf_number);
- if (ret_val)
- goto out_no_write;
-
- /* flush msg and acks as we are overwriting the message buffer */
- e1000_check_for_msg_pf(hw, vf_number);
- e1000_check_for_ack_pf(hw, vf_number);
-
- /* copy the caller specified message to the mailbox memory buffer */
- for (i = 0; i < size; i++)
- E1000_WRITE_REG_ARRAY(hw, E1000_VMBMEM(vf_number), i, msg[i]);
-
- /* Interrupt VF to tell it a message has been sent and release buffer*/
- E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_STS);
-
- /* update stats */
- hw->mbx.stats.msgs_tx++;
-
-out_no_write:
- return ret_val;
-
-}
-
-/**
- * e1000_read_mbx_pf - Read a message from the mailbox
- * @hw: pointer to the HW structure
- * @msg: The message buffer
- * @size: Length of buffer
- * @vf_number: the VF index
- *
- * This function copies a message from the mailbox buffer to the caller's
- * memory buffer. The presumption is that the caller knows that there was
- * a message due to a VF request so no polling for message is needed.
- **/
-static s32 e1000_read_mbx_pf(struct e1000_hw *hw, u32 *msg, u16 size,
- u16 vf_number)
-{
- s32 ret_val;
- u16 i;
-
- DEBUGFUNC("e1000_read_mbx_pf");
-
- /* lock the mailbox to prevent pf/vf race condition */
- ret_val = e1000_obtain_mbx_lock_pf(hw, vf_number);
- if (ret_val)
- goto out_no_read;
-
- /* copy the message to the mailbox memory buffer */
- for (i = 0; i < size; i++)
- msg[i] = E1000_READ_REG_ARRAY(hw, E1000_VMBMEM(vf_number), i);
-
- /* Acknowledge the message and release buffer */
- E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_ACK);
-
- /* update stats */
- hw->mbx.stats.msgs_rx++;
-
-out_no_read:
- return ret_val;
-}
-
-/**
- * e1000_init_mbx_params_pf - set initial values for pf mailbox
- * @hw: pointer to the HW structure
- *
- * Initializes the hw->mbx struct to correct values for pf mailbox
- */
-s32 e1000_init_mbx_params_pf(struct e1000_hw *hw)
-{
- struct e1000_mbx_info *mbx = &hw->mbx;
-
- switch (hw->mac.type) {
- case e1000_82576:
- case e1000_i350:
- case e1000_i354:
- mbx->timeout = 0;
- mbx->usec_delay = 0;
-
- mbx->size = E1000_VFMAILBOX_SIZE;
-
- mbx->ops.read = e1000_read_mbx_pf;
- mbx->ops.write = e1000_write_mbx_pf;
- mbx->ops.read_posted = e1000_read_posted_mbx;
- mbx->ops.write_posted = e1000_write_posted_mbx;
- mbx->ops.check_for_msg = e1000_check_for_msg_pf;
- mbx->ops.check_for_ack = e1000_check_for_ack_pf;
- mbx->ops.check_for_rst = e1000_check_for_rst_pf;
-
- mbx->stats.msgs_tx = 0;
- mbx->stats.msgs_rx = 0;
- mbx->stats.reqs = 0;
- mbx->stats.acks = 0;
- mbx->stats.rsts = 0;
- default:
- return E1000_SUCCESS;
- }
-}
Code Review / deb_dpdk.git / blobdiff