openEuler_kernel_rk3588/drivers/net/ethernet/mucse/rnpm/rnpm_mbx.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2022 - 2024 Mucse Corporation. */

#include <linux/pci.h>
#include <linux/delay.h>
#include "rnpm.h"
#include "rnpm_type.h"
#include "rnpm_common.h"
#include "rnpm_mbx.h"
#include "rnpm_mbx_fw.h"

// #define MBX_RD_DEBUG

/* == VEC == */
#define VF2PF_MBOX_VEC(VF) (0xa5100 + 4 * (VF))
#define CPU2PF_MBOX_VEC (0xa5300)

/* == PF <--> VF mailbox ==== */
/* 64bytes */
#define SHARE_MEM_BYTES 64
/* for PF1 rtl will remap 6000 to 0xb000 */
#define PF_VF_SHM(vf) ((0xa6000) + (64 * (vf)))
#define PF2VF_COUNTER(vf) (PF_VF_SHM(vf) + 0)
#define VF2PF_COUNTER(vf) (PF_VF_SHM(vf) + 4)
#define PF_VF_SHM_DATA(vf) (PF_VF_SHM(vf) + 8)
#define PF2VF_MBOX_CTRL(vf) ((0xa7100) + (4 * (vf)))
#define PF_VF_MBOX_MASK_LO ((0xa7200))
#define PF_VF_MBOX_MASK_HI ((0xa7300))

//=== CPU <--> PF ===
#define CPU_PF_SHM (0xaa000)
#define CPU2PF_COUNTER (CPU_PF_SHM + 0)
#define PF2CPU_COUNTER (CPU_PF_SHM + 4)
#define CPU_PF_SHM_DATA (CPU_PF_SHM + 8)
#define PF2CPU_MBOX_CTRL (0xaa100)
#define CPU_PF_MBOX_MASK (0xaa300)

#define MBOX_CTRL_REQ (1 << 0) // WO
//#define MBOX_CTRL_VF_HOLD_SHM       (1<<2) // VF:WR, PF:RO
#define MBOX_CTRL_PF_HOLD_SHM (1 << 3) // VF:RO, PF:WR
//#define MBOX_CTRL_PF_CPU_HOLD_SHM   (1<<3) // for pf <--> cpu

#define MBOX_IRQ_EN 0
#define MBOX_IRQ_DISABLE 1

#define mbx_prd32(hw, reg) prnp_rd_reg((hw)->hw_addr + (reg))
#define mbx_rd32(hw, reg) rnpm_rd_reg((hw)->hw_addr + (reg))
#define mbx_pwr32(hw, reg, val) p_rnp_wr_reg((hw)->hw_addr + (reg), (val))
#define mbx_wr32(hw, reg, val) rnpm_wr_reg((hw)->hw_addr + (reg), (val))

/**
 *  rnpm_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/vfnum to read
 *
 *  returns SUCCESS if it successfully read message from buffer
 **/
s32 rnpm_read_mbx(struct rnpm_hw *hw, u32 *msg, u16 size, enum MBX_ID mbx_id)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;
	s32 ret_val = RNPM_ERR_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);
	else
		TRACE();

	return ret_val;
}

/**
 *  rnpm_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 rnpm_write_mbx(struct rnpm_hw *hw, u32 *msg, u16 size, enum MBX_ID mbx_id)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;
	s32 ret_val = 0;

	if (size > mbx->size)
		ret_val = RNPM_ERR_MBX;
	else if (mbx->ops.write)
		ret_val = mbx->ops.write(hw, msg, size, mbx_id);

	return ret_val;
}

static inline u16 rnpm_mbx_get_req(struct rnpm_hw *hw, int reg)
{
	/* memory barrior */
	mb();
	return mbx_rd32(hw, reg) & 0xffff;
}

static inline u16 rnpm_mbx_get_ack(struct rnpm_hw *hw, int reg)
{
	/* memory barrior */
	mb();
	return (mbx_rd32(hw, reg) >> 16) & 0xffff;
}

static inline void rnpm_mbx_inc_pf_req(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	u16 req;
	int reg =
		(mbx_id == MBX_CM3CPU) ? PF2CPU_COUNTER : PF2VF_COUNTER(mbx_id);
	u32 v = mbx_rd32(hw, reg);

	req = (v & 0xffff);
	req++;
	v &= ~(0x0000ffff);
	v |= req;
	/* memory barrior */
	mb();

	mbx_wr32(hw, reg, v);

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

static inline void rnpm_mbx_inc_pf_ack(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	u16 ack;
	int reg =
		(mbx_id == MBX_CM3CPU) ? PF2CPU_COUNTER : PF2VF_COUNTER(mbx_id);
	u32 v = mbx_rd32(hw, reg);

	ack = (v >> 16) & 0xffff;
	ack++;
	v &= ~(0xffff0000);
	v |= (ack << 16);
	/* memory barrior */
	mb();
	mbx_wr32(hw, reg, v);

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

/**
 *  rnpm_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 rnpm_check_for_msg(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;
	s32 ret_val = RNPM_ERR_MBX;

	if (mbx->ops.check_for_msg)
		ret_val = mbx->ops.check_for_msg(hw, mbx_id);

	return ret_val;
}

/**
 *  rnpm_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 rnpm_check_for_ack(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;
	s32 ret_val = RNPM_ERR_MBX;

	if (mbx->ops.check_for_ack)
		ret_val = mbx->ops.check_for_ack(hw, mbx_id);

	return ret_val;
}

/**
 *  rnpm_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 rnpm_poll_for_msg(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;
	int countdown = mbx->timeout;

	if (!countdown || !mbx->ops.check_for_msg)
		goto out;

	while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) {
		countdown--;
		if (!countdown)
			break;
		udelay(mbx->usec_delay);
	}

out:
	return countdown ? 0 : -ETIME;
}

/**
 *  rnpm_poll_for_ack - Wait for message acknowledgment
 *  @hw: pointer to the HW structure
 *  @mbx_id: id of mailbox to write
 *
 *  returns SUCCESS if it successfully received a message acknowledgment
 **/
static s32 rnpm_poll_for_ack(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;
	int countdown = mbx->timeout;

	if (!countdown || !mbx->ops.check_for_ack)
		goto out;

	while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) {
		countdown--;
		if (!countdown)
			break;
		udelay(mbx->usec_delay);
	}

out:
	return countdown ? 0 : -ETIME;
}

/**
 *  rnpm_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.
 **/
static s32 rnpm_read_posted_mbx(struct rnpm_hw *hw, u32 *msg, u16 size,
				enum MBX_ID mbx_id)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;
	s32 ret_val = RNPM_ERR_MBX;

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

	ret_val = rnpm_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;
}

/**
 *  rnpm_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
 **/
static s32 rnpm_write_posted_mbx(struct rnpm_hw *hw, u32 *msg, u16 size,
				 enum MBX_ID mbx_id)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;
	s32 ret_val = RNPM_ERR_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 and hold buffer lock */
	ret_val = mbx->ops.write(hw, msg, size, mbx_id);

	/* if msg sent wait until we receive an ack */
	if (!ret_val)
		ret_val = rnpm_poll_for_ack(hw, mbx_id);

out:
	return ret_val;
}

/**
 *  rnpm_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 rnpm_check_for_msg_pf(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	s32 ret_val = RNPM_ERR_MBX;

	if (mbx_id == MBX_CM3CPU) {
		if (rnpm_mbx_get_req(hw, CPU2PF_COUNTER) != hw->mbx.cpu_req) {
			ret_val = 0;
			hw->mbx.stats.reqs++;
		}
	} else {
		if (rnpm_mbx_get_req(hw, VF2PF_COUNTER(mbx_id)) !=
		    hw->mbx.vf_req[mbx_id]) {
			ret_val = 0;
			hw->mbx.stats.reqs++;
		}
	}

	return ret_val;
}

/**
 *  rnpm_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 rnpm_check_for_ack_pf(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	s32 ret_val = RNPM_ERR_MBX;

	if (mbx_id == MBX_CM3CPU) {
		if (rnpm_mbx_get_ack(hw, CPU2PF_COUNTER) != hw->mbx.cpu_ack) {
			ret_val = 0;
			hw->mbx.stats.acks++;
		}
	} else {
		if (rnpm_mbx_get_ack(hw, VF2PF_COUNTER(mbx_id)) !=
		    hw->mbx.vf_ack[mbx_id]) {
			ret_val = 0;
			hw->mbx.stats.acks++;
		}
	}

	return ret_val;
}

/**
 *  rnpm_obtain_mbx_lock_pf - obtain mailbox lock
 *  @hw: pointer to the HW structure
 *  @mbx_id: the VF index or CPU
 *
 *  return SUCCESS if we obtained the mailbox lock
 **/
static s32 rnpm_obtain_mbx_lock_pf(struct rnpm_hw *hw, enum MBX_ID mbx_id)
{
	int try_cnt = 5000;
	s32 ret_val = -EPERM;
	u32 CTRL_REG = (mbx_id == MBX_CM3CPU) ? PF2CPU_MBOX_CTRL :
						      PF2VF_MBOX_CTRL(mbx_id);

	while (try_cnt-- > 0) {
		/* Take ownership of the buffer */
		mbx_wr32(hw, CTRL_REG, MBOX_CTRL_PF_HOLD_SHM);
		/* memory barrior */
		mb();
		/* reserve mailbox for cm3 use */
		if (mbx_rd32(hw, CTRL_REG) & MBOX_CTRL_PF_HOLD_SHM)
			return 0;
		udelay(100);
	}

	rnpm_err("%s: failed to get:%d lock\n", __func__, mbx_id);
	return ret_val;
}

/**
 *  rnpm_write_mbx_pf - Places a message in the mailbox
 *  @hw: pointer to the HW structure
 *  @msg: The message buffer
 *  @size: Length of buffer
 *  @mbx_id: the VF index
 *
 *  returns SUCCESS if it successfully copied message into the buffer
 **/
static s32 rnpm_write_mbx_pf(struct rnpm_hw *hw, u32 *msg, u16 size,
			     enum MBX_ID mbx_id)
{
	s32 ret_val = 0;
	u16 i;
	u32 DATA_REG = (mbx_id == MBX_CM3CPU) ? CPU_PF_SHM_DATA :
						      PF_VF_SHM_DATA(mbx_id);
	u32 CTRL_REG = (mbx_id == MBX_CM3CPU) ? PF2CPU_MBOX_CTRL :
						      PF2VF_MBOX_CTRL(mbx_id);
	u32 wait_msg_free_cnt = 4;

	if (size > RNPM_VFMAILBOX_SIZE) {
		rnpm_info("%s: size:%d should <%d\n", __func__, size,
			  RNPM_VFMAILBOX_SIZE);
		return -EINVAL;
	}

	if (rnpm_logd_level(LOG_MBX_OUT)) {
		rnpm_logd(LOG_MBX_OUT, "%x mbx_out:", hw->pfvfnum);
		for (i = 0; i < 4; i++)
			rnpm_logd(LOG_MBX_OUT, " 0x%08x ", msg[i]);
		rnpm_logd(LOG_MBX_OUT, "\n");
	}

retry:
	wait_msg_free_cnt--;
	if (wait_msg_free_cnt > 0 && mbx_rd32(hw, DATA_REG) != 0) {
		udelay(1000);
		// unlock
		goto retry;
	}

	/* lock the mailbox to prevent pf/vf/cpu race condition */
	ret_val = rnpm_obtain_mbx_lock_pf(hw, mbx_id);
	if (ret_val) {
		rnpm_err(
			"%s: get mbx:%d wlock failed. ret:%d. req:0x%08x-0x%08x\n",
			__func__, mbx_id, ret_val, msg[0], msg[1]);
		goto out_no_write;
	}

	/* copy the caller specified message to the mailbox memory buffer */
	for (i = 0; i < size; i++) {
#ifdef MBX_WR_DEBUG
		mbx_pwr32(hw, DATA_REG + i * 4, msg[i]);
#else
		mbx_wr32(hw, DATA_REG + i * 4, msg[i]);
#endif
	}

	/* flush msg and acks as we are overwriting the message buffer */
	if (mbx_id == MBX_CM3CPU) {
		hw->mbx.cpu_ack = rnpm_mbx_get_ack(hw, CPU2PF_COUNTER);
	} else {
		hw->mbx.vf_ack[mbx_id] =
			rnpm_mbx_get_ack(hw, VF2PF_COUNTER(mbx_id));
	}
	rnpm_mbx_inc_pf_req(hw, mbx_id);
	/* Interrupt VF/CM3 to tell it a message has
	 * been sent and release buffer
	 */
	udelay(30);
	mbx_wr32(hw, CTRL_REG, MBOX_CTRL_REQ);
out_no_write:
	/* sometimes happen */
	/*printk("cannot get lock\n"); */

	return ret_val;
}

/**
 *  rnpm_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/CPU request so no polling for message is needed.
 **/
static s32 rnpm_read_mbx_pf(struct rnpm_hw *hw, u32 *msg, u16 size,
			    enum MBX_ID mbx_id)
{
	s32 ret_val = -EIO;
	u32 i;
	u32 BUF_REG = (mbx_id == MBX_CM3CPU) ? CPU_PF_SHM_DATA :
						     PF_VF_SHM_DATA(mbx_id);
	u32 CTRL_REG = (mbx_id == MBX_CM3CPU) ? PF2CPU_MBOX_CTRL :
						      PF2VF_MBOX_CTRL(mbx_id);

	if (size > RNPM_VFMAILBOX_SIZE) {
		rnpm_info("%s: size:%d should <%d\n", __func__, size,
			  RNPM_VFMAILBOX_SIZE);
		return -EINVAL;
	}
	/* lock the mailbox to prevent pf/vf race condition */
	ret_val = rnpm_obtain_mbx_lock_pf(hw, mbx_id);
	if (ret_val) {
		ret_val = -EPERM;
		goto out_no_read;
	}
	/* memory barrior */
	mb();
	/* copy the message from the mailbox memory buffer */
	for (i = 0; i < size; i++) {
#ifdef MBX_RD_DEBUG
		msg[i] = mbx_prd32(hw, BUF_REG + 4 * i);
#else
		msg[i] = mbx_rd32(hw, BUF_REG + 4 * i);
#endif
	}
	// zero opcode
	mbx_wr32(hw, BUF_REG, 0);

	/* update req. used by rnpmvf_check_for_msg_vf  */
	if (mbx_id == MBX_CM3CPU) {
		hw->mbx.cpu_req = rnpm_mbx_get_req(hw, CPU2PF_COUNTER);
	} else {
		hw->mbx.vf_req[mbx_id] =
			rnpm_mbx_get_req(hw, VF2PF_COUNTER(mbx_id));
	}
	/* this ack maybe too earier? */
	/* Acknowledge receipt and release mailbox, then we're done */
	rnpm_mbx_inc_pf_ack(hw, mbx_id);

	/* free ownership of the buffer */
	mbx_wr32(hw, CTRL_REG, 0);

	if (rnpm_logd_level(LOG_MBX_IN)) {
		rnpm_logd(LOG_MBX_IN, "%x mbx_in :", hw->pfvfnum);
		for (i = 0; i < 16; i++)
			rnpm_logd(LOG_MBX_IN, "0x%08x ", msg[i]);
		rnpm_logd(LOG_MBX_IN, "\n");
	}

out_no_read:

	return ret_val;
}

static void rnpm_mbx_reset(struct rnpm_hw *hw)
{
	int idx, v;

	for (idx = 0; idx < RNP_MAX_VF_FUNCTIONS; idx++) {
		v = mbx_rd32(hw, VF2PF_COUNTER(idx));
		hw->mbx.vf_req[idx] = v & 0xffff;
		hw->mbx.vf_ack[idx] = (v >> 16) & 0xffff;

		// release pf<->vf pfu buffer lock
		mbx_wr32(hw, PF2VF_MBOX_CTRL(idx), 0);
	}
	// reset pf->cm3 status
	v = mbx_rd32(hw, CPU2PF_COUNTER);
	hw->mbx.cpu_req = v & 0xffff;
	hw->mbx.cpu_ack = (v >> 16) & 0xffff;
	// release   pf->cm3 buffer lock
	mbx_wr32(hw, PF2CPU_MBOX_CTRL, 0);

	wr32(hw, PF_VF_MBOX_MASK_LO, 0); // allow vf to vectors
	wr32(hw, PF_VF_MBOX_MASK_HI, 0); // enable irq

	// allow CM3CPU to PF MBX IRQ
	wr32(hw, CPU_PF_MBOX_MASK, 0);
}

static int rnpm_mbx_configure_pf(struct rnpm_hw *hw, int nr_vec, bool enable)
{
	int idx = 0;
	u32 v;

	// dump_stack();

	if (enable) {
		// hw->mbx.irq_enabled = true;
		for (idx = 0; idx < RNPM_MAX_VF_FUNCTIONS; idx++) {
			v = mbx_rd32(hw, VF2PF_COUNTER(idx));
			hw->mbx.vf_req[idx] = v & 0xffff;
			hw->mbx.vf_ack[idx] = (v >> 16) & 0xffff;

			/* release pf<->vf pfu buffer lock */
			mbx_wr32(hw, PF2VF_MBOX_CTRL(idx), 0);
		}
		/* reset pf->cm3 status */
		v = mbx_rd32(hw, CPU2PF_COUNTER);
		hw->mbx.cpu_req = v & 0xffff;
		hw->mbx.cpu_ack = (v >> 16) & 0xffff;
		/* release   pf->cm3 buffer lock */
		mbx_wr32(hw, PF2CPU_MBOX_CTRL, 0);

		/* allow VF to PF MBX IRQ */
		for (idx = 0; idx < RNPM_MAX_VF_FUNCTIONS; idx++) {
			/* vf to pf req interrupt */
			mbx_wr32(hw, VF2PF_MBOX_VEC(idx), nr_vec);
		}

		wr32(hw, PF_VF_MBOX_MASK_LO, 0); // allow vf to vectors
		wr32(hw, PF_VF_MBOX_MASK_HI, 0); // enable irq

		// bind cm3cpu mbx to irq
		// cm3 and VF63 share #63 irq
		wr32(hw, CPU2PF_MBOX_VEC, nr_vec);
		// allow CM3CPU to PF MBX IRQ
		wr32(hw, CPU_PF_MBOX_MASK, 0);
	} else {
		// hw->mbx.irq_enabled = false;

		wr32(hw, PF_VF_MBOX_MASK_LO, 0xffffffff); // disable irq
		wr32(hw, PF_VF_MBOX_MASK_HI, 0xffffffff); // disable irq

		// disable CM3CPU to PF MBX IRQ
		wr32(hw, CPU_PF_MBOX_MASK, 0xffffffff);

		// reset vf->pf status/ctrl
		for (idx = 0; idx < RNPM_MAX_VF_FUNCTIONS; idx++)
			mbx_wr32(hw, PF2VF_MBOX_CTRL(idx), 0);

		// reset pf->cm3 ctrl
		mbx_wr32(hw, PF2CPU_MBOX_CTRL, 0);

		wr32(hw, RNPM_DMA_DUMY, 0);
	}

	return 0;
}

/**
 *  rnpm_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 rnpm_init_mbx_params_pf(struct rnpm_hw *hw)
{
	struct rnpm_mbx_info *mbx = &hw->mbx;

	mbx->usec_delay = 100;
	// wait 5s
	mbx->timeout = (4 * 1000 * 1000) / mbx->usec_delay;

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

	mbx->size = RNPM_VFMAILBOX_SIZE;

	mbx->reply_dma_size = 4096;
	mbx->reply_dma = dma_alloc_coherent(&hw->pdev->dev, mbx->reply_dma_size,
					    &mbx->reply_dma_phy, GFP_ATOMIC);
	if (!mbx->reply_dma) {
		mbx->reply_dma =
			dma_alloc_coherent(&hw->pdev->dev, mbx->reply_dma_size,
					   &mbx->reply_dma_phy, GFP_ATOMIC);
		if (!mbx->reply_dma) {
			rnpm_err("%s: dma_alloc_coherent failed! %p\n", __func__,
				 mbx->reply_dma);
			mbx->reply_dma = NULL;
			mbx->reply_dma_size = 0;
		}
	}

	rnpm_mbx_reset(hw);

	return 0;
}

struct rnpm_mbx_operations mbx_ops_generic = {
	.init_params = rnpm_init_mbx_params_pf,
	.read = rnpm_read_mbx_pf,
	.write = rnpm_write_mbx_pf,
	.read_posted = rnpm_read_posted_mbx,
	.write_posted = rnpm_write_posted_mbx,
	.check_for_msg = rnpm_check_for_msg_pf,
	.check_for_ack = rnpm_check_for_ack_pf,
	.configure = rnpm_mbx_configure_pf,
};