igbvf_mbx.c File Reference

#include "igbvf_mbx.h"

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_ONLY)
static s32	igbvf_poll_for_msg (struct e1000_hw *hw, u16 mbx_id)
	igbvf_poll_for_msg - Wait for message notification @hw: pointer to the HW structure @mbx_id: id of mailbox to write More...
static s32	igbvf_poll_for_ack (struct e1000_hw *hw, u16 mbx_id)
	igbvf_poll_for_ack - Wait for message acknowledgement @hw: pointer to the HW structure @mbx_id: id of mailbox to write More...
static s32	igbvf_read_posted_mbx (struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id)
	igbvf_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 More...
static s32	igbvf_write_posted_mbx (struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id)
	igbvf_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 More...
void	igbvf_init_mbx_ops_generic (struct e1000_hw *hw)
	igbvf_init_mbx_ops_generic - Initialize NVM function pointers @hw: pointer to the HW structure More...
static u32	igbvf_read_v2p_mailbox (struct e1000_hw *hw)
	igbvf_read_v2p_mailbox - read v2p mailbox @hw: pointer to the HW structure More...
static s32	igbvf_check_for_bit_vf (struct e1000_hw *hw, u32 mask)
	igbvf_check_for_bit_vf - Determine if a status bit was set @hw: pointer to the HW structure @mask: bitmask for bits to be tested and cleared More...
static s32	igbvf_check_for_msg_vf (struct e1000_hw *hw, u16 mbx_id __unused)
	igbvf_check_for_msg_vf - checks to see if the PF has sent mail @hw: pointer to the HW structure @mbx_id: id of mailbox to check More...
static s32	igbvf_check_for_ack_vf (struct e1000_hw *hw, u16 mbx_id __unused)
	igbvf_check_for_ack_vf - checks to see if the PF has ACK'd @hw: pointer to the HW structure @mbx_id: id of mailbox to check More...
static s32	igbvf_check_for_rst_vf (struct e1000_hw *hw, u16 mbx_id __unused)
	igbvf_check_for_rst_vf - checks to see if the PF has reset @hw: pointer to the HW structure @mbx_id: id of mailbox to check More...
static s32	igbvf_obtain_mbx_lock_vf (struct e1000_hw *hw)
	igbvf_obtain_mbx_lock_vf - obtain mailbox lock @hw: pointer to the HW structure More...
static s32	igbvf_write_mbx_vf (struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id __unused)
	igbvf_write_mbx_vf - 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 More...
static s32	igbvf_read_mbx_vf (struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id __unused)
	igbvf_read_mbx_vf - Reads a message from the inbox intended for vf @hw: pointer to the HW structure @msg: The message buffer @size: Length of buffer @mbx_id: id of mailbox to read More...
s32	igbvf_init_mbx_params_vf (struct e1000_hw *hw)
	igbvf_init_mbx_params_vf - set initial values for vf mailbox @hw: pointer to the HW structure More...

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_ONLY

)

igbvf_poll_for_msg()

static s32 igbvf_poll_for_msg ( struct e1000_hw *  hw, u16  mbx_id  )

static

igbvf_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

Definition at line 40 of file igbvf_mbx.c.

{
        struct e1000_mbx_info *mbx = &hw->mbx;
        int countdown = mbx->timeout;

        DEBUGFUNC("igbvf_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;
}

References e1000_mbx_operations::check_for_msg, DEBUGFUNC, E1000_ERR_MBX, E1000_SUCCESS, e1000_mbx_info::ops, out, e1000_mbx_info::timeout, usec_delay, and e1000_mbx_info::usec_delay.

Referenced by igbvf_read_posted_mbx().

igbvf_poll_for_ack()

static s32 igbvf_poll_for_ack ( struct e1000_hw *  hw, u16  mbx_id  )

static

igbvf_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

Definition at line 71 of file igbvf_mbx.c.

{
        struct e1000_mbx_info *mbx = &hw->mbx;
        int countdown = mbx->timeout;

        DEBUGFUNC("igbvf_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;
}

References e1000_mbx_operations::check_for_ack, DEBUGFUNC, E1000_ERR_MBX, E1000_SUCCESS, e1000_mbx_info::ops, out, e1000_mbx_info::timeout, usec_delay, and e1000_mbx_info::usec_delay.

Referenced by igbvf_write_posted_mbx().

igbvf_read_posted_mbx()

static s32 igbvf_read_posted_mbx ( struct e1000_hw *  hw, u32 *  msg, u16  size, u16  mbx_id  )

static

igbvf_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.

Definition at line 105 of file igbvf_mbx.c.

{
        struct e1000_mbx_info *mbx = &hw->mbx;
        s32 ret_val = -E1000_ERR_MBX;

        DEBUGFUNC("igbvf_read_posted_mbx");

        if (!mbx->ops.read)
                goto out;

        ret_val = igbvf_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;
}

References DEBUGFUNC, E1000_ERR_MBX, igbvf_poll_for_msg(), msg(), e1000_mbx_info::ops, out, e1000_mbx_operations::read, and size.

Referenced by igbvf_init_mbx_ops_generic(), and igbvf_init_mbx_params_vf().

igbvf_write_posted_mbx()

static s32 igbvf_write_posted_mbx ( struct e1000_hw *  hw, u32 *  msg, u16  size, u16  mbx_id  )

static

igbvf_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

Definition at line 135 of file igbvf_mbx.c.

{
        struct e1000_mbx_info *mbx = &hw->mbx;
        s32 ret_val = -E1000_ERR_MBX;

        DEBUGFUNC("igbvf_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 = igbvf_poll_for_ack(hw, mbx_id);
out:
        return ret_val;
}

References DEBUGFUNC, E1000_ERR_MBX, igbvf_poll_for_ack(), msg(), e1000_mbx_info::ops, out, size, e1000_mbx_info::timeout, and e1000_mbx_operations::write.

Referenced by igbvf_init_mbx_ops_generic(), and igbvf_init_mbx_params_vf().

igbvf_init_mbx_ops_generic()

void igbvf_init_mbx_ops_generic

(

struct e1000_hw *

hw

)

igbvf_init_mbx_ops_generic - Initialize NVM function pointers @hw: pointer to the HW structure

Setups up the function pointers to no-op functions

Definition at line 163 of file igbvf_mbx.c.

{
        struct e1000_mbx_info *mbx = &hw->mbx;
        mbx->ops.read_posted = igbvf_read_posted_mbx;
        mbx->ops.write_posted = igbvf_write_posted_mbx;
}

References igbvf_read_posted_mbx(), igbvf_write_posted_mbx(), e1000_mbx_info::ops, e1000_mbx_operations::read_posted, and e1000_mbx_operations::write_posted.

igbvf_read_v2p_mailbox()

static u32 igbvf_read_v2p_mailbox ( struct e1000_hw *  hw )

static

igbvf_read_v2p_mailbox - read v2p mailbox @hw: pointer to the HW structure

This function is used to read the v2p mailbox without losing the read to clear status bits.

Definition at line 177 of file igbvf_mbx.c.

{
        u32 v2p_mailbox = E1000_READ_REG(hw, E1000_V2PMAILBOX(0));

        v2p_mailbox |= hw->dev_spec.vf.v2p_mailbox;
        hw->dev_spec.vf.v2p_mailbox |= v2p_mailbox & E1000_V2PMAILBOX_R2C_BITS;

        return v2p_mailbox;
}

References E1000_READ_REG, E1000_V2PMAILBOX, and E1000_V2PMAILBOX_R2C_BITS.

Referenced by igbvf_check_for_bit_vf(), and igbvf_obtain_mbx_lock_vf().

igbvf_check_for_bit_vf()

static s32 igbvf_check_for_bit_vf ( struct e1000_hw *  hw, u32  mask  )

static

igbvf_check_for_bit_vf - Determine if a status bit was set @hw: pointer to the HW structure @mask: bitmask for bits to be tested and cleared

This function is used to check for the read to clear bits within the V2P mailbox.

Definition at line 195 of file igbvf_mbx.c.

{
        u32 v2p_mailbox = igbvf_read_v2p_mailbox(hw);
        s32 ret_val = -E1000_ERR_MBX;

        if (v2p_mailbox & mask)
                ret_val = E1000_SUCCESS;

        hw->dev_spec.vf.v2p_mailbox &= ~mask;

        return ret_val;
}

References E1000_ERR_MBX, E1000_SUCCESS, and igbvf_read_v2p_mailbox().

Referenced by igbvf_check_for_ack_vf(), igbvf_check_for_msg_vf(), and igbvf_check_for_rst_vf().

igbvf_check_for_msg_vf()

static s32 igbvf_check_for_msg_vf ( struct e1000_hw *  hw, u16 mbx_id  __unused  )

static

igbvf_check_for_msg_vf - checks to see if the PF has sent mail @hw: pointer to the HW structure @mbx_id: id of mailbox to check

returns SUCCESS if the PF has set the Status bit or else ERR_MBX

Definition at line 215 of file igbvf_mbx.c.

{
        s32 ret_val = -E1000_ERR_MBX;

        DEBUGFUNC("igbvf_check_for_msg_vf");

        if (!igbvf_check_for_bit_vf(hw, E1000_V2PMAILBOX_PFSTS)) {
                ret_val = E1000_SUCCESS;
                hw->mbx.stats.reqs++;
        }

        return ret_val;
}

References DEBUGFUNC, E1000_ERR_MBX, E1000_SUCCESS, E1000_V2PMAILBOX_PFSTS, and igbvf_check_for_bit_vf().

Referenced by igbvf_init_mbx_params_vf(), and igbvf_write_mbx_vf().

igbvf_check_for_ack_vf()

static s32 igbvf_check_for_ack_vf ( struct e1000_hw *  hw, u16 mbx_id  __unused  )

static

igbvf_check_for_ack_vf - checks to see if the PF has ACK'd @hw: pointer to the HW structure @mbx_id: id of mailbox to check

returns SUCCESS if the PF has set the ACK bit or else ERR_MBX

Definition at line 236 of file igbvf_mbx.c.

{
        s32 ret_val = -E1000_ERR_MBX;

        DEBUGFUNC("igbvf_check_for_ack_vf");

        if (!igbvf_check_for_bit_vf(hw, E1000_V2PMAILBOX_PFACK)) {
                ret_val = E1000_SUCCESS;
                hw->mbx.stats.acks++;
        }

        return ret_val;
}

References DEBUGFUNC, E1000_ERR_MBX, E1000_SUCCESS, E1000_V2PMAILBOX_PFACK, and igbvf_check_for_bit_vf().

Referenced by igbvf_init_mbx_params_vf(), and igbvf_write_mbx_vf().

igbvf_check_for_rst_vf()

static s32 igbvf_check_for_rst_vf ( struct e1000_hw *  hw, u16 mbx_id  __unused  )

static

igbvf_check_for_rst_vf - checks to see if the PF has reset @hw: pointer to the HW structure @mbx_id: id of mailbox to check

returns true if the PF has set the reset done bit or else false

Definition at line 257 of file igbvf_mbx.c.

{
        s32 ret_val = -E1000_ERR_MBX;

        DEBUGFUNC("igbvf_check_for_rst_vf");

        if (!igbvf_check_for_bit_vf(hw, (E1000_V2PMAILBOX_RSTD |
                                         E1000_V2PMAILBOX_RSTI))) {
                ret_val = E1000_SUCCESS;
                hw->mbx.stats.rsts++;
        }

        return ret_val;
}

References DEBUGFUNC, E1000_ERR_MBX, E1000_SUCCESS, E1000_V2PMAILBOX_RSTD, E1000_V2PMAILBOX_RSTI, and igbvf_check_for_bit_vf().

Referenced by igbvf_init_mbx_params_vf().

igbvf_obtain_mbx_lock_vf()

static s32 igbvf_obtain_mbx_lock_vf ( struct e1000_hw *  hw )

static

igbvf_obtain_mbx_lock_vf - obtain mailbox lock @hw: pointer to the HW structure

return SUCCESS if we obtained the mailbox lock

Definition at line 278 of file igbvf_mbx.c.

{
        s32 ret_val = -E1000_ERR_MBX;

        DEBUGFUNC("igbvf_obtain_mbx_lock_vf");

        /* Take ownership of the buffer */
        E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_VFU);

        /* reserve mailbox for vf use */
        if (igbvf_read_v2p_mailbox(hw) & E1000_V2PMAILBOX_VFU)
                ret_val = E1000_SUCCESS;

        return ret_val;
}

References DEBUGFUNC, E1000_ERR_MBX, E1000_SUCCESS, E1000_V2PMAILBOX, E1000_V2PMAILBOX_VFU, E1000_WRITE_REG, and igbvf_read_v2p_mailbox().

Referenced by igbvf_read_mbx_vf(), and igbvf_write_mbx_vf().

igbvf_write_mbx_vf()

static s32 igbvf_write_mbx_vf ( struct e1000_hw *  hw, u32 *  msg, u16  size, u16 mbx_id  __unused  )

static

igbvf_write_mbx_vf - 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

Definition at line 303 of file igbvf_mbx.c.

{
        s32 ret_val;
        u16 i;


        DEBUGFUNC("igbvf_write_mbx_vf");

        /* lock the mailbox to prevent pf/vf race condition */
        ret_val = igbvf_obtain_mbx_lock_vf(hw);
        if (ret_val)
                goto out_no_write;

        /* flush msg and acks as we are overwriting the message buffer */
        igbvf_check_for_msg_vf(hw, 0);
        igbvf_check_for_ack_vf(hw, 0);

        /* copy the caller specified message to the mailbox memory buffer */
        for (i = 0; i < size; i++)
                E1000_WRITE_REG_ARRAY(hw, E1000_VMBMEM(0), i, msg[i]);

        /* update stats */
        hw->mbx.stats.msgs_tx++;

        /* Drop VFU and interrupt the PF to tell it a message has been sent */
        E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_REQ);

out_no_write:
        return ret_val;
}

References DEBUGFUNC, E1000_V2PMAILBOX, E1000_V2PMAILBOX_REQ, E1000_VMBMEM, E1000_WRITE_REG, E1000_WRITE_REG_ARRAY, igbvf_check_for_ack_vf(), igbvf_check_for_msg_vf(), igbvf_obtain_mbx_lock_vf(), msg(), and size.

Referenced by igbvf_init_mbx_params_vf().

igbvf_read_mbx_vf()

static s32 igbvf_read_mbx_vf ( struct e1000_hw *  hw, u32 *  msg, u16  size, u16 mbx_id  __unused  )

static

igbvf_read_mbx_vf - Reads a message from the inbox intended for vf @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 successfuly read message from buffer

Definition at line 344 of file igbvf_mbx.c.

{
        s32 ret_val = E1000_SUCCESS;
        u16 i;

        DEBUGFUNC("igbvf_read_mbx_vf");

        /* lock the mailbox to prevent pf/vf race condition */
        ret_val = igbvf_obtain_mbx_lock_vf(hw);
        if (ret_val)
                goto out_no_read;

        /* copy the message from the mailbox memory buffer */
        for (i = 0; i < size; i++)
                msg[i] = E1000_READ_REG_ARRAY(hw, E1000_VMBMEM(0), i);

        /* Acknowledge receipt and release mailbox, then we're done */
        E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_ACK);

        /* update stats */
        hw->mbx.stats.msgs_rx++;

out_no_read:
        return ret_val;
}

References DEBUGFUNC, E1000_READ_REG_ARRAY, E1000_SUCCESS, E1000_V2PMAILBOX, E1000_V2PMAILBOX_ACK, E1000_VMBMEM, E1000_WRITE_REG, igbvf_obtain_mbx_lock_vf(), msg(), and size.

Referenced by igbvf_init_mbx_params_vf().

igbvf_init_mbx_params_vf()

s32 igbvf_init_mbx_params_vf

(

struct e1000_hw *

hw

)

igbvf_init_mbx_params_vf - set initial values for vf mailbox @hw: pointer to the HW structure

Initializes the hw->mbx struct to correct values for vf mailbox

Definition at line 377 of file igbvf_mbx.c.

{
        struct e1000_mbx_info *mbx = &hw->mbx;

        /* start mailbox as timed out and let the reset_hw call set the timeout
         * value to begin communications */
        mbx->timeout = 0;
        mbx->usec_delay = E1000_VF_MBX_INIT_DELAY;

        mbx->size = E1000_VFMAILBOX_SIZE;

        mbx->ops.read = igbvf_read_mbx_vf;
        mbx->ops.write = igbvf_write_mbx_vf;
        mbx->ops.read_posted = igbvf_read_posted_mbx;
        mbx->ops.write_posted = igbvf_write_posted_mbx;
        mbx->ops.check_for_msg = igbvf_check_for_msg_vf;
        mbx->ops.check_for_ack = igbvf_check_for_ack_vf;
        mbx->ops.check_for_rst = igbvf_check_for_rst_vf;

        mbx->stats.msgs_tx = 0;
        mbx->stats.msgs_rx = 0;
        mbx->stats.reqs = 0;
        mbx->stats.acks = 0;
        mbx->stats.rsts = 0;

        return E1000_SUCCESS;
}

References e1000_mbx_stats::acks, e1000_mbx_operations::check_for_ack, e1000_mbx_operations::check_for_msg, e1000_mbx_operations::check_for_rst, E1000_SUCCESS, E1000_VF_MBX_INIT_DELAY, E1000_VFMAILBOX_SIZE, igbvf_check_for_ack_vf(), igbvf_check_for_msg_vf(), igbvf_check_for_rst_vf(), igbvf_read_mbx_vf(), igbvf_read_posted_mbx(), igbvf_write_mbx_vf(), igbvf_write_posted_mbx(), e1000_mbx_stats::msgs_rx, e1000_mbx_stats::msgs_tx, e1000_mbx_info::ops, e1000_mbx_operations::read, e1000_mbx_operations::read_posted, e1000_mbx_stats::reqs, e1000_mbx_stats::rsts, e1000_mbx_info::size, e1000_mbx_info::stats, e1000_mbx_info::timeout, e1000_mbx_info::usec_delay, e1000_mbx_operations::write, and e1000_mbx_operations::write_posted.

Referenced by igbvf_init_function_pointers_vf().