drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c - linux - Git at Google

 /*
  * Copyright 2014 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  */

 #include "amdgpu.h"
 #include "nbio/nbio_2_3_offset.h"
 #include "nbio/nbio_2_3_sh_mask.h"
 #include "gc/gc_10_1_0_offset.h"
 #include "gc/gc_10_1_0_sh_mask.h"
 #include "soc15.h"
 #include "navi10_ih.h"
 #include "soc15_common.h"
 #include "mxgpu_nv.h"

 static void xgpu_nv_mailbox_send_ack(struct amdgpu_device *adev)
 {
 	WREG8(NV_MAIBOX_CONTROL_RCV_OFFSET_BYTE, 2);
 }

 static void xgpu_nv_mailbox_set_valid(struct amdgpu_device *adev, bool val)
 {
 	WREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE, val ? 1 : 0);
 }

 /*
  * this peek_msg could *only* be called in IRQ routine becuase in IRQ routine
  * RCV_MSG_VALID filed of BIF_BX_PF_MAILBOX_CONTROL must already be set to 1
  * by host.
  *
  * if called no in IRQ routine, this peek_msg cannot guaranteed to return the
  * correct value since it doesn't return the RCV_DW0 under the case that
  * RCV_MSG_VALID is set by host.
  */
 static enum idh_event xgpu_nv_mailbox_peek_msg(struct amdgpu_device *adev)
 {
 	return RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
 }


 static int xgpu_nv_mailbox_rcv_msg(struct amdgpu_device *adev,
 				   enum idh_event event)
 {
 	u32 reg;

 	reg = RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
 	if (reg != event)
 		return -ENOENT;

 	xgpu_nv_mailbox_send_ack(adev);

 	return 0;
 }

 static uint8_t xgpu_nv_peek_ack(struct amdgpu_device *adev)
 {
 	return RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE) & 2;
 }

 static int xgpu_nv_poll_ack(struct amdgpu_device *adev)
 {
 	int timeout  = NV_MAILBOX_POLL_ACK_TIMEDOUT;
 	u8 reg;

 	do {
 		reg = RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE);
 		if (reg & 2)
 			return 0;

 		mdelay(5);
 		timeout -= 5;
 	} while (timeout > 1);

 	pr_err("Doesn't get TRN_MSG_ACK from pf in %d msec\n", NV_MAILBOX_POLL_ACK_TIMEDOUT);

 	return -ETIME;
 }

 static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
 {
 	int r, timeout = NV_MAILBOX_POLL_MSG_TIMEDOUT;

 	do {
 		r = xgpu_nv_mailbox_rcv_msg(adev, event);
 		if (!r)
 			return 0;

 		msleep(10);
 		timeout -= 10;
 	} while (timeout > 1);


 	return -ETIME;
 }

 static void xgpu_nv_mailbox_trans_msg (struct amdgpu_device *adev,
 	      enum idh_request req, u32 data1, u32 data2, u32 data3)
 {
 	int r;
 	uint8_t trn;

 	/* IMPORTANT:
 	 * clear TRN_MSG_VALID valid to clear host's RCV_MSG_ACK
 	 * and with host's RCV_MSG_ACK cleared hw automatically clear host's RCV_MSG_ACK
 	 * which lead to VF's TRN_MSG_ACK cleared, otherwise below xgpu_nv_poll_ack()
 	 * will return immediatly
 	 */
 	do {
 		xgpu_nv_mailbox_set_valid(adev, false);
 		trn = xgpu_nv_peek_ack(adev);
 		if (trn) {
 			pr_err("trn=%x ACK should not assert! wait again !\n", trn);
 			msleep(1);
 		}
 	} while (trn);

 	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW0, req);
 	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW1, data1);
 	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW2, data2);
 	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW3, data3);
 	xgpu_nv_mailbox_set_valid(adev, true);

 	/* start to poll ack */
 	r = xgpu_nv_poll_ack(adev);
 	if (r)
 		pr_err("Doesn't get ack from pf, continue\n");

 	xgpu_nv_mailbox_set_valid(adev, false);
 }

 static int xgpu_nv_send_access_requests(struct amdgpu_device *adev,
 					enum idh_request req)
 {
 	int r;
 	enum idh_event event = -1;

 	xgpu_nv_mailbox_trans_msg(adev, req, 0, 0, 0);

 	switch (req) {
 	case IDH_REQ_GPU_INIT_ACCESS:
 	case IDH_REQ_GPU_FINI_ACCESS:
 	case IDH_REQ_GPU_RESET_ACCESS:
 		event = IDH_READY_TO_ACCESS_GPU;
 		break;
 	case IDH_REQ_GPU_INIT_DATA:
 		event = IDH_REQ_GPU_INIT_DATA_READY;
 		break;
 	default:
 		break;
 	}

 	if (event != -1) {
 		r = xgpu_nv_poll_msg(adev, event);
 		if (r) {
 			if (req != IDH_REQ_GPU_INIT_DATA) {
 				pr_err("Doesn't get msg:%d from pf, error=%d\n", event, r);
 				return r;
 			}
 			else /* host doesn't support REQ_GPU_INIT_DATA handshake */
 				adev->virt.req_init_data_ver = 0;
 		} else {
 			if (req == IDH_REQ_GPU_INIT_DATA)
 			{
 				adev->virt.req_init_data_ver =
 					RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW1);

 				/* assume V1 in case host doesn't set version number */
 				if (adev->virt.req_init_data_ver < 1)
 					adev->virt.req_init_data_ver = 1;
 			}
 		}

 		/* Retrieve checksum from mailbox2 */
 		if (req == IDH_REQ_GPU_INIT_ACCESS || req == IDH_REQ_GPU_RESET_ACCESS) {
 			adev->virt.fw_reserve.checksum_key =
 				RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW2);
 		}
 	}

 	return 0;
 }

 static int xgpu_nv_request_reset(struct amdgpu_device *adev)
 {
 	return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_RESET_ACCESS);
 }

 static int xgpu_nv_request_full_gpu_access(struct amdgpu_device *adev,
 					   bool init)
 {
 	enum idh_request req;

 	req = init ? IDH_REQ_GPU_INIT_ACCESS : IDH_REQ_GPU_FINI_ACCESS;
 	return xgpu_nv_send_access_requests(adev, req);
 }

 static int xgpu_nv_release_full_gpu_access(struct amdgpu_device *adev,
 					   bool init)
 {
 	enum idh_request req;
 	int r = 0;

 	req = init ? IDH_REL_GPU_INIT_ACCESS : IDH_REL_GPU_FINI_ACCESS;
 	r = xgpu_nv_send_access_requests(adev, req);

 	return r;
 }

 static int xgpu_nv_request_init_data(struct amdgpu_device *adev)
 {
 	return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_INIT_DATA);
 }

 static int xgpu_nv_mailbox_ack_irq(struct amdgpu_device *adev,
 					struct amdgpu_irq_src *source,
 					struct amdgpu_iv_entry *entry)
 {
 	DRM_DEBUG("get ack intr and do nothing.\n");
 	return 0;
 }

 static int xgpu_nv_set_mailbox_ack_irq(struct amdgpu_device *adev,
 					struct amdgpu_irq_src *source,
 					unsigned type,
 					enum amdgpu_interrupt_state state)
 {
 	u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);

 	if (state == AMDGPU_IRQ_STATE_ENABLE)
 		tmp |= 2;
 	else
 		tmp &= ~2;

 	WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);

 	return 0;
 }

 static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
 {
 	struct amdgpu_virt *virt = container_of(work, struct amdgpu_virt, flr_work);
 	struct amdgpu_device *adev = container_of(virt, struct amdgpu_device, virt);
 	int timeout = NV_MAILBOX_POLL_FLR_TIMEDOUT;
 	int locked;

 	/* block amdgpu_gpu_recover till msg FLR COMPLETE received,
 	 * otherwise the mailbox msg will be ruined/reseted by
 	 * the VF FLR.
 	 *
 	 * we can unlock the lock_reset to allow "amdgpu_job_timedout"
 	 * to run gpu_recover() after FLR_NOTIFICATION_CMPL received
 	 * which means host side had finished this VF's FLR.
 	 */
 	locked = mutex_trylock(&adev->lock_reset);
 	if (locked)
 		atomic_set(&adev->in_gpu_reset, 1);

 	do {
 		if (xgpu_nv_mailbox_peek_msg(adev) == IDH_FLR_NOTIFICATION_CMPL)
 			goto flr_done;

 		msleep(10);
 		timeout -= 10;
 	} while (timeout > 1);

 flr_done:
 	if (locked) {
 		atomic_set(&adev->in_gpu_reset, 0);
 		mutex_unlock(&adev->lock_reset);
 	}

 	/* Trigger recovery for world switch failure if no TDR */
 	if (amdgpu_device_should_recover_gpu(adev)
 		&& (amdgpu_device_has_job_running(adev) ||
 		adev->sdma_timeout == MAX_SCHEDULE_TIMEOUT ||
 		adev->gfx_timeout == MAX_SCHEDULE_TIMEOUT ||
 		adev->compute_timeout == MAX_SCHEDULE_TIMEOUT ||
 		adev->video_timeout == MAX_SCHEDULE_TIMEOUT))
 		amdgpu_device_gpu_recover(adev, NULL);
 }

 static int xgpu_nv_set_mailbox_rcv_irq(struct amdgpu_device *adev,
 				       struct amdgpu_irq_src *src,
 				       unsigned type,
 				       enum amdgpu_interrupt_state state)
 {
 	u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);

 	if (state == AMDGPU_IRQ_STATE_ENABLE)
 		tmp |= 1;
 	else
 		tmp &= ~1;

 	WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);

 	return 0;
 }

 static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
 				   struct amdgpu_irq_src *source,
 				   struct amdgpu_iv_entry *entry)
 {
 	enum idh_event event = xgpu_nv_mailbox_peek_msg(adev);

 	switch (event) {
 	case IDH_FLR_NOTIFICATION:
 		if (amdgpu_sriov_runtime(adev))
 			schedule_work(&adev->virt.flr_work);
 		break;
 		/* READY_TO_ACCESS_GPU is fetched by kernel polling, IRQ can ignore
 		 * it byfar since that polling thread will handle it,
 		 * other msg like flr complete is not handled here.
 		 */
 	case IDH_CLR_MSG_BUF:
 	case IDH_FLR_NOTIFICATION_CMPL:
 	case IDH_READY_TO_ACCESS_GPU:
 	default:
 		break;
 	}

 	return 0;
 }

 static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_ack_irq_funcs = {
 	.set = xgpu_nv_set_mailbox_ack_irq,
 	.process = xgpu_nv_mailbox_ack_irq,
 };

 static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_rcv_irq_funcs = {
 	.set = xgpu_nv_set_mailbox_rcv_irq,
 	.process = xgpu_nv_mailbox_rcv_irq,
 };

 void xgpu_nv_mailbox_set_irq_funcs(struct amdgpu_device *adev)
 {
 	adev->virt.ack_irq.num_types = 1;
 	adev->virt.ack_irq.funcs = &xgpu_nv_mailbox_ack_irq_funcs;
 	adev->virt.rcv_irq.num_types = 1;
 	adev->virt.rcv_irq.funcs = &xgpu_nv_mailbox_rcv_irq_funcs;
 }

 int xgpu_nv_mailbox_add_irq_id(struct amdgpu_device *adev)
 {
 	int r;

 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 135, &adev->virt.rcv_irq);
 	if (r)
 		return r;

 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 138, &adev->virt.ack_irq);
 	if (r) {
 		amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 		return r;
 	}

 	return 0;
 }

 int xgpu_nv_mailbox_get_irq(struct amdgpu_device *adev)
 {
 	int r;

 	r = amdgpu_irq_get(adev, &adev->virt.rcv_irq, 0);
 	if (r)
 		return r;
 	r = amdgpu_irq_get(adev, &adev->virt.ack_irq, 0);
 	if (r) {
 		amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 		return r;
 	}

 	INIT_WORK(&adev->virt.flr_work, xgpu_nv_mailbox_flr_work);

 	return 0;
 }

 void xgpu_nv_mailbox_put_irq(struct amdgpu_device *adev)
 {
 	amdgpu_irq_put(adev, &adev->virt.ack_irq, 0);
 	amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
 }

 const struct amdgpu_virt_ops xgpu_nv_virt_ops = {
 	.req_full_gpu	= xgpu_nv_request_full_gpu_access,
 	.rel_full_gpu	= xgpu_nv_release_full_gpu_access,
 	.req_init_data  = xgpu_nv_request_init_data,
 	.reset_gpu = xgpu_nv_request_reset,
 	.wait_reset = NULL,
 	.trans_msg = xgpu_nv_mailbox_trans_msg,
 };
	/*
	* Copyright 2014 Advanced Micro Devices, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	*/

	#include "amdgpu.h"
	#include "nbio/nbio_2_3_offset.h"
	#include "nbio/nbio_2_3_sh_mask.h"
	#include "gc/gc_10_1_0_offset.h"
	#include "gc/gc_10_1_0_sh_mask.h"
	#include "soc15.h"
	#include "navi10_ih.h"
	#include "soc15_common.h"
	#include "mxgpu_nv.h"

	static void xgpu_nv_mailbox_send_ack(struct amdgpu_device *adev)
	{
	WREG8(NV_MAIBOX_CONTROL_RCV_OFFSET_BYTE, 2);
	}

	static void xgpu_nv_mailbox_set_valid(struct amdgpu_device *adev, bool val)
	{
	WREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE, val ? 1 : 0);
	}

	/*
	* this peek_msg could only be called in IRQ routine becuase in IRQ routine
	* RCV_MSG_VALID filed of BIF_BX_PF_MAILBOX_CONTROL must already be set to 1
	* by host.
	*
	* if called no in IRQ routine, this peek_msg cannot guaranteed to return the
	* correct value since it doesn't return the RCV_DW0 under the case that
	* RCV_MSG_VALID is set by host.
	*/
	static enum idh_event xgpu_nv_mailbox_peek_msg(struct amdgpu_device *adev)
	{
	return RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
	}


	static int xgpu_nv_mailbox_rcv_msg(struct amdgpu_device *adev,
	enum idh_event event)
	{
	u32 reg;

	reg = RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW0);
	if (reg != event)
	return -ENOENT;

	xgpu_nv_mailbox_send_ack(adev);

	return 0;
	}

	static uint8_t xgpu_nv_peek_ack(struct amdgpu_device *adev)
	{
	return RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE) & 2;
	}

	static int xgpu_nv_poll_ack(struct amdgpu_device *adev)
	{
	int timeout = NV_MAILBOX_POLL_ACK_TIMEDOUT;
	u8 reg;

	do {
	reg = RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE);
	if (reg & 2)
	return 0;

	mdelay(5);
	timeout -= 5;
	} while (timeout > 1);

	pr_err("Doesn't get TRN_MSG_ACK from pf in %d msec\n", NV_MAILBOX_POLL_ACK_TIMEDOUT);

	return -ETIME;
	}

	static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
	{
	int r, timeout = NV_MAILBOX_POLL_MSG_TIMEDOUT;

	do {
	r = xgpu_nv_mailbox_rcv_msg(adev, event);
	if (!r)
	return 0;

	msleep(10);
	timeout -= 10;
	} while (timeout > 1);


	return -ETIME;
	}

	static void xgpu_nv_mailbox_trans_msg (struct amdgpu_device *adev,
	enum idh_request req, u32 data1, u32 data2, u32 data3)
	{
	int r;
	uint8_t trn;

	/* IMPORTANT:
	* clear TRN_MSG_VALID valid to clear host's RCV_MSG_ACK
	* and with host's RCV_MSG_ACK cleared hw automatically clear host's RCV_MSG_ACK
	* which lead to VF's TRN_MSG_ACK cleared, otherwise below xgpu_nv_poll_ack()
	* will return immediatly
	*/
	do {
	xgpu_nv_mailbox_set_valid(adev, false);
	trn = xgpu_nv_peek_ack(adev);
	if (trn) {
	pr_err("trn=%x ACK should not assert! wait again !\n", trn);
	msleep(1);
	}
	} while (trn);

	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW0, req);
	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW1, data1);
	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW2, data2);
	WREG32_NO_KIQ(mmMAILBOX_MSGBUF_TRN_DW3, data3);
	xgpu_nv_mailbox_set_valid(adev, true);

	/* start to poll ack */
	r = xgpu_nv_poll_ack(adev);
	if (r)
	pr_err("Doesn't get ack from pf, continue\n");

	xgpu_nv_mailbox_set_valid(adev, false);
	}

	static int xgpu_nv_send_access_requests(struct amdgpu_device *adev,
	enum idh_request req)
	{
	int r;
	enum idh_event event = -1;

	xgpu_nv_mailbox_trans_msg(adev, req, 0, 0, 0);

	switch (req) {
	case IDH_REQ_GPU_INIT_ACCESS:
	case IDH_REQ_GPU_FINI_ACCESS:
	case IDH_REQ_GPU_RESET_ACCESS:
	event = IDH_READY_TO_ACCESS_GPU;
	break;
	case IDH_REQ_GPU_INIT_DATA:
	event = IDH_REQ_GPU_INIT_DATA_READY;
	break;
	default:
	break;
	}

	if (event != -1) {
	r = xgpu_nv_poll_msg(adev, event);
	if (r) {
	if (req != IDH_REQ_GPU_INIT_DATA) {
	pr_err("Doesn't get msg:%d from pf, error=%d\n", event, r);
	return r;
	}
	else /* host doesn't support REQ_GPU_INIT_DATA handshake */
	adev->virt.req_init_data_ver = 0;
	} else {
	if (req == IDH_REQ_GPU_INIT_DATA)
	{
	adev->virt.req_init_data_ver =
	RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW1);

	/* assume V1 in case host doesn't set version number */
	if (adev->virt.req_init_data_ver < 1)
	adev->virt.req_init_data_ver = 1;
	}
	}

	/* Retrieve checksum from mailbox2 */
	if (req == IDH_REQ_GPU_INIT_ACCESS \|\| req == IDH_REQ_GPU_RESET_ACCESS) {
	adev->virt.fw_reserve.checksum_key =
	RREG32_NO_KIQ(mmMAILBOX_MSGBUF_RCV_DW2);
	}
	}

	return 0;
	}

	static int xgpu_nv_request_reset(struct amdgpu_device *adev)
	{
	return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_RESET_ACCESS);
	}

	static int xgpu_nv_request_full_gpu_access(struct amdgpu_device *adev,
	bool init)
	{
	enum idh_request req;

	req = init ? IDH_REQ_GPU_INIT_ACCESS : IDH_REQ_GPU_FINI_ACCESS;
	return xgpu_nv_send_access_requests(adev, req);
	}

	static int xgpu_nv_release_full_gpu_access(struct amdgpu_device *adev,
	bool init)
	{
	enum idh_request req;
	int r = 0;

	req = init ? IDH_REL_GPU_INIT_ACCESS : IDH_REL_GPU_FINI_ACCESS;
	r = xgpu_nv_send_access_requests(adev, req);

	return r;
	}

	static int xgpu_nv_request_init_data(struct amdgpu_device *adev)
	{
	return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_INIT_DATA);
	}

	static int xgpu_nv_mailbox_ack_irq(struct amdgpu_device *adev,
	struct amdgpu_irq_src *source,
	struct amdgpu_iv_entry *entry)
	{
	DRM_DEBUG("get ack intr and do nothing.\n");
	return 0;
	}

	static int xgpu_nv_set_mailbox_ack_irq(struct amdgpu_device *adev,
	struct amdgpu_irq_src *source,
	unsigned type,
	enum amdgpu_interrupt_state state)
	{
	u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);

	if (state == AMDGPU_IRQ_STATE_ENABLE)
	tmp \|= 2;
	else
	tmp &= ~2;

	WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);

	return 0;
	}

	static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
	{
	struct amdgpu_virt *virt = container_of(work, struct amdgpu_virt, flr_work);
	struct amdgpu_device *adev = container_of(virt, struct amdgpu_device, virt);
	int timeout = NV_MAILBOX_POLL_FLR_TIMEDOUT;
	int locked;

	/* block amdgpu_gpu_recover till msg FLR COMPLETE received,
	* otherwise the mailbox msg will be ruined/reseted by
	* the VF FLR.
	*
	* we can unlock the lock_reset to allow "amdgpu_job_timedout"
	* to run gpu_recover() after FLR_NOTIFICATION_CMPL received
	* which means host side had finished this VF's FLR.
	*/
	locked = mutex_trylock(&adev->lock_reset);
	if (locked)
	atomic_set(&adev->in_gpu_reset, 1);

	do {
	if (xgpu_nv_mailbox_peek_msg(adev) == IDH_FLR_NOTIFICATION_CMPL)
	goto flr_done;

	msleep(10);
	timeout -= 10;
	} while (timeout > 1);

	flr_done:
	if (locked) {
	atomic_set(&adev->in_gpu_reset, 0);
	mutex_unlock(&adev->lock_reset);
	}

	/* Trigger recovery for world switch failure if no TDR */
	if (amdgpu_device_should_recover_gpu(adev)
	&& (amdgpu_device_has_job_running(adev) \|\|
	adev->sdma_timeout == MAX_SCHEDULE_TIMEOUT \|\|
	adev->gfx_timeout == MAX_SCHEDULE_TIMEOUT \|\|
	adev->compute_timeout == MAX_SCHEDULE_TIMEOUT \|\|
	adev->video_timeout == MAX_SCHEDULE_TIMEOUT))
	amdgpu_device_gpu_recover(adev, NULL);
	}

	static int xgpu_nv_set_mailbox_rcv_irq(struct amdgpu_device *adev,
	struct amdgpu_irq_src *src,
	unsigned type,
	enum amdgpu_interrupt_state state)
	{
	u32 tmp = RREG32_NO_KIQ(mmMAILBOX_INT_CNTL);

	if (state == AMDGPU_IRQ_STATE_ENABLE)
	tmp \|= 1;
	else
	tmp &= ~1;

	WREG32_NO_KIQ(mmMAILBOX_INT_CNTL, tmp);

	return 0;
	}

	static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
	struct amdgpu_irq_src *source,
	struct amdgpu_iv_entry *entry)
	{
	enum idh_event event = xgpu_nv_mailbox_peek_msg(adev);

	switch (event) {
	case IDH_FLR_NOTIFICATION:
	if (amdgpu_sriov_runtime(adev))
	schedule_work(&adev->virt.flr_work);
	break;
	/* READY_TO_ACCESS_GPU is fetched by kernel polling, IRQ can ignore
	* it byfar since that polling thread will handle it,
	* other msg like flr complete is not handled here.
	*/
	case IDH_CLR_MSG_BUF:
	case IDH_FLR_NOTIFICATION_CMPL:
	case IDH_READY_TO_ACCESS_GPU:
	default:
	break;
	}

	return 0;
	}

	static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_ack_irq_funcs = {
	.set = xgpu_nv_set_mailbox_ack_irq,
	.process = xgpu_nv_mailbox_ack_irq,
	};

	static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_rcv_irq_funcs = {
	.set = xgpu_nv_set_mailbox_rcv_irq,
	.process = xgpu_nv_mailbox_rcv_irq,
	};

	void xgpu_nv_mailbox_set_irq_funcs(struct amdgpu_device *adev)
	{
	adev->virt.ack_irq.num_types = 1;
	adev->virt.ack_irq.funcs = &xgpu_nv_mailbox_ack_irq_funcs;
	adev->virt.rcv_irq.num_types = 1;
	adev->virt.rcv_irq.funcs = &xgpu_nv_mailbox_rcv_irq_funcs;
	}

	int xgpu_nv_mailbox_add_irq_id(struct amdgpu_device *adev)
	{
	int r;

	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 135, &adev->virt.rcv_irq);
	if (r)
	return r;

	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 138, &adev->virt.ack_irq);
	if (r) {
	amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
	return r;
	}

	return 0;
	}

	int xgpu_nv_mailbox_get_irq(struct amdgpu_device *adev)
	{
	int r;

	r = amdgpu_irq_get(adev, &adev->virt.rcv_irq, 0);
	if (r)
	return r;
	r = amdgpu_irq_get(adev, &adev->virt.ack_irq, 0);
	if (r) {
	amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
	return r;
	}

	INIT_WORK(&adev->virt.flr_work, xgpu_nv_mailbox_flr_work);

	return 0;
	}

	void xgpu_nv_mailbox_put_irq(struct amdgpu_device *adev)
	{
	amdgpu_irq_put(adev, &adev->virt.ack_irq, 0);
	amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
	}

	const struct amdgpu_virt_ops xgpu_nv_virt_ops = {
	.req_full_gpu = xgpu_nv_request_full_gpu_access,
	.rel_full_gpu = xgpu_nv_release_full_gpu_access,
	.req_init_data = xgpu_nv_request_init_data,
	.reset_gpu = xgpu_nv_request_reset,
	.wait_reset = NULL,
	.trans_msg = xgpu_nv_mailbox_trans_msg,
	};