drivers/crypto/qat/qat_common/adf_sriov.c - linux - Git at Google

 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
 /* Copyright(c) 2015 - 2020 Intel Corporation */
 #include <linux/workqueue.h>
 #include <linux/pci.h>
 #include <linux/device.h>
 #include <linux/iommu.h>
 #include "adf_common_drv.h"
 #include "adf_cfg.h"
 #include "adf_pf2vf_msg.h"

 static struct workqueue_struct *pf2vf_resp_wq;

 #define ME2FUNCTION_MAP_A_OFFSET	(0x3A400 + 0x190)
 #define ME2FUNCTION_MAP_A_NUM_REGS	96

 #define ME2FUNCTION_MAP_B_OFFSET	(0x3A400 + 0x310)
 #define ME2FUNCTION_MAP_B_NUM_REGS	12

 #define ME2FUNCTION_MAP_REG_SIZE	4
 #define ME2FUNCTION_MAP_VALID		BIT(7)

 #define READ_CSR_ME2FUNCTION_MAP_A(pmisc_bar_addr, index)		\
 	ADF_CSR_RD(pmisc_bar_addr, ME2FUNCTION_MAP_A_OFFSET +		\
 		   ME2FUNCTION_MAP_REG_SIZE * index)

 #define WRITE_CSR_ME2FUNCTION_MAP_A(pmisc_bar_addr, index, value)	\
 	ADF_CSR_WR(pmisc_bar_addr, ME2FUNCTION_MAP_A_OFFSET +		\
 		   ME2FUNCTION_MAP_REG_SIZE * index, value)

 #define READ_CSR_ME2FUNCTION_MAP_B(pmisc_bar_addr, index)		\
 	ADF_CSR_RD(pmisc_bar_addr, ME2FUNCTION_MAP_B_OFFSET +		\
 		   ME2FUNCTION_MAP_REG_SIZE * index)

 #define WRITE_CSR_ME2FUNCTION_MAP_B(pmisc_bar_addr, index, value)	\
 	ADF_CSR_WR(pmisc_bar_addr, ME2FUNCTION_MAP_B_OFFSET +		\
 		   ME2FUNCTION_MAP_REG_SIZE * index, value)

 struct adf_pf2vf_resp {
 	struct work_struct pf2vf_resp_work;
 	struct adf_accel_vf_info *vf_info;
 };

 static void adf_iov_send_resp(struct work_struct *work)
 {
 	struct adf_pf2vf_resp *pf2vf_resp =
 		container_of(work, struct adf_pf2vf_resp, pf2vf_resp_work);

 	adf_vf2pf_req_hndl(pf2vf_resp->vf_info);
 	kfree(pf2vf_resp);
 }

 static void adf_vf2pf_bh_handler(void *data)
 {
 	struct adf_accel_vf_info *vf_info = (struct adf_accel_vf_info *)data;
 	struct adf_pf2vf_resp *pf2vf_resp;

 	pf2vf_resp = kzalloc(sizeof(*pf2vf_resp), GFP_ATOMIC);
 	if (!pf2vf_resp)
 		return;

 	pf2vf_resp->vf_info = vf_info;
 	INIT_WORK(&pf2vf_resp->pf2vf_resp_work, adf_iov_send_resp);
 	queue_work(pf2vf_resp_wq, &pf2vf_resp->pf2vf_resp_work);
 }

 static int adf_enable_sriov(struct adf_accel_dev *accel_dev)
 {
 	struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
 	int totalvfs = pci_sriov_get_totalvfs(pdev);
 	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 	struct adf_bar *pmisc =
 			&GET_BARS(accel_dev)[hw_data->get_misc_bar_id(hw_data)];
 	void __iomem *pmisc_addr = pmisc->virt_addr;
 	struct adf_accel_vf_info *vf_info;
 	int i;
 	u32 reg;

 	for (i = 0, vf_info = accel_dev->pf.vf_info; i < totalvfs;
 	     i++, vf_info++) {
 		/* This ptr will be populated when VFs will be created */
 		vf_info->accel_dev = accel_dev;
 		vf_info->vf_nr = i;

 		tasklet_init(&vf_info->vf2pf_bh_tasklet,
 			     (void *)adf_vf2pf_bh_handler,
 			     (unsigned long)vf_info);
 		mutex_init(&vf_info->pf2vf_lock);
 		ratelimit_state_init(&vf_info->vf2pf_ratelimit,
 				     DEFAULT_RATELIMIT_INTERVAL,
 				     DEFAULT_RATELIMIT_BURST);
 	}

 	/* Set Valid bits in ME Thread to PCIe Function Mapping Group A */
 	for (i = 0; i < ME2FUNCTION_MAP_A_NUM_REGS; i++) {
 		reg = READ_CSR_ME2FUNCTION_MAP_A(pmisc_addr, i);
 		reg |= ME2FUNCTION_MAP_VALID;
 		WRITE_CSR_ME2FUNCTION_MAP_A(pmisc_addr, i, reg);
 	}

 	/* Set Valid bits in ME Thread to PCIe Function Mapping Group B */
 	for (i = 0; i < ME2FUNCTION_MAP_B_NUM_REGS; i++) {
 		reg = READ_CSR_ME2FUNCTION_MAP_B(pmisc_addr, i);
 		reg |= ME2FUNCTION_MAP_VALID;
 		WRITE_CSR_ME2FUNCTION_MAP_B(pmisc_addr, i, reg);
 	}

 	/* Enable VF to PF interrupts for all VFs */
 	adf_enable_vf2pf_interrupts(accel_dev, GENMASK_ULL(totalvfs - 1, 0));

 	/*
 	 * Due to the hardware design, when SR-IOV and the ring arbiter
 	 * are enabled all the VFs supported in hardware must be enabled in
 	 * order for all the hardware resources (i.e. bundles) to be usable.
 	 * When SR-IOV is enabled, each of the VFs will own one bundle.
 	 */
 	return pci_enable_sriov(pdev, totalvfs);
 }

 /**
  * adf_disable_sriov() - Disable SRIOV for the device
  * @accel_dev:  Pointer to accel device.
  *
  * Function disables SRIOV for the accel device.
  *
  * Return: 0 on success, error code otherwise.
  */
 void adf_disable_sriov(struct adf_accel_dev *accel_dev)
 {
 	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 	struct adf_bar *pmisc =
 			&GET_BARS(accel_dev)[hw_data->get_misc_bar_id(hw_data)];
 	void __iomem *pmisc_addr = pmisc->virt_addr;
 	int totalvfs = pci_sriov_get_totalvfs(accel_to_pci_dev(accel_dev));
 	struct adf_accel_vf_info *vf;
 	u32 reg;
 	int i;

 	if (!accel_dev->pf.vf_info)
 		return;

 	adf_pf2vf_notify_restarting(accel_dev);

 	pci_disable_sriov(accel_to_pci_dev(accel_dev));

 	/* Disable VF to PF interrupts */
 	adf_disable_vf2pf_interrupts(accel_dev, 0xFFFFFFFF);

 	/* Clear Valid bits in ME Thread to PCIe Function Mapping Group A */
 	for (i = 0; i < ME2FUNCTION_MAP_A_NUM_REGS; i++) {
 		reg = READ_CSR_ME2FUNCTION_MAP_A(pmisc_addr, i);
 		reg &= ~ME2FUNCTION_MAP_VALID;
 		WRITE_CSR_ME2FUNCTION_MAP_A(pmisc_addr, i, reg);
 	}

 	/* Clear Valid bits in ME Thread to PCIe Function Mapping Group B */
 	for (i = 0; i < ME2FUNCTION_MAP_B_NUM_REGS; i++) {
 		reg = READ_CSR_ME2FUNCTION_MAP_B(pmisc_addr, i);
 		reg &= ~ME2FUNCTION_MAP_VALID;
 		WRITE_CSR_ME2FUNCTION_MAP_B(pmisc_addr, i, reg);
 	}

 	for (i = 0, vf = accel_dev->pf.vf_info; i < totalvfs; i++, vf++) {
 		tasklet_disable(&vf->vf2pf_bh_tasklet);
 		tasklet_kill(&vf->vf2pf_bh_tasklet);
 		mutex_destroy(&vf->pf2vf_lock);
 	}

 	kfree(accel_dev->pf.vf_info);
 	accel_dev->pf.vf_info = NULL;
 }
 EXPORT_SYMBOL_GPL(adf_disable_sriov);

 /**
  * adf_sriov_configure() - Enable SRIOV for the device
  * @pdev:  Pointer to pci device.
  * @numvfs: Number of virtual functions (VFs) to enable.
  *
  * Note that the @numvfs parameter is ignored and all VFs supported by the
  * device are enabled due to the design of the hardware.
  *
  * Function enables SRIOV for the pci device.
  *
  * Return: number of VFs enabled on success, error code otherwise.
  */
 int adf_sriov_configure(struct pci_dev *pdev, int numvfs)
 {
 	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 	int totalvfs = pci_sriov_get_totalvfs(pdev);
 	unsigned long val;
 	int ret;

 	if (!accel_dev) {
 		dev_err(&pdev->dev, "Failed to find accel_dev\n");
 		return -EFAULT;
 	}

 	if (!iommu_present(&pci_bus_type))
 		dev_warn(&pdev->dev, "IOMMU should be enabled for SR-IOV to work correctly\n");

 	if (accel_dev->pf.vf_info) {
 		dev_info(&pdev->dev, "Already enabled for this device\n");
 		return -EINVAL;
 	}

 	if (adf_dev_started(accel_dev)) {
 		if (adf_devmgr_in_reset(accel_dev) ||
 		    adf_dev_in_use(accel_dev)) {
 			dev_err(&GET_DEV(accel_dev), "Device busy\n");
 			return -EBUSY;
 		}

 		adf_dev_stop(accel_dev);
 		adf_dev_shutdown(accel_dev);
 	}

 	if (adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC))
 		return -EFAULT;
 	val = 0;
 	if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 					ADF_NUM_CY, (void *)&val, ADF_DEC))
 		return -EFAULT;

 	set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);

 	/* Allocate memory for VF info structs */
 	accel_dev->pf.vf_info = kcalloc(totalvfs,
 					sizeof(struct adf_accel_vf_info),
 					GFP_KERNEL);
 	if (!accel_dev->pf.vf_info)
 		return -ENOMEM;

 	if (adf_dev_init(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev), "Failed to init qat_dev%d\n",
 			accel_dev->accel_id);
 		return -EFAULT;
 	}

 	if (adf_dev_start(accel_dev)) {
 		dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
 			accel_dev->accel_id);
 		return -EFAULT;
 	}

 	ret = adf_enable_sriov(accel_dev);
 	if (ret)
 		return ret;

 	return numvfs;
 }
 EXPORT_SYMBOL_GPL(adf_sriov_configure);

 int __init adf_init_pf_wq(void)
 {
 	/* Workqueue for PF2VF responses */
 	pf2vf_resp_wq = alloc_workqueue("qat_pf2vf_resp_wq", WQ_MEM_RECLAIM, 0);

 	return !pf2vf_resp_wq ? -ENOMEM : 0;
 }

 void adf_exit_pf_wq(void)
 {
 	if (pf2vf_resp_wq) {
 		destroy_workqueue(pf2vf_resp_wq);
 		pf2vf_resp_wq = NULL;
 	}
 }
	// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
	/* Copyright(c) 2015 - 2020 Intel Corporation */
	#include <linux/workqueue.h>
	#include <linux/pci.h>
	#include <linux/device.h>
	#include <linux/iommu.h>
	#include "adf_common_drv.h"
	#include "adf_cfg.h"
	#include "adf_pf2vf_msg.h"

	static struct workqueue_struct *pf2vf_resp_wq;

	#define ME2FUNCTION_MAP_A_OFFSET (0x3A400 + 0x190)
	#define ME2FUNCTION_MAP_A_NUM_REGS 96

	#define ME2FUNCTION_MAP_B_OFFSET (0x3A400 + 0x310)
	#define ME2FUNCTION_MAP_B_NUM_REGS 12

	#define ME2FUNCTION_MAP_REG_SIZE 4
	#define ME2FUNCTION_MAP_VALID BIT(7)

	#define READ_CSR_ME2FUNCTION_MAP_A(pmisc_bar_addr, index) \
	ADF_CSR_RD(pmisc_bar_addr, ME2FUNCTION_MAP_A_OFFSET + \
	ME2FUNCTION_MAP_REG_SIZE * index)

	#define WRITE_CSR_ME2FUNCTION_MAP_A(pmisc_bar_addr, index, value) \
	ADF_CSR_WR(pmisc_bar_addr, ME2FUNCTION_MAP_A_OFFSET + \
	ME2FUNCTION_MAP_REG_SIZE * index, value)

	#define READ_CSR_ME2FUNCTION_MAP_B(pmisc_bar_addr, index) \
	ADF_CSR_RD(pmisc_bar_addr, ME2FUNCTION_MAP_B_OFFSET + \
	ME2FUNCTION_MAP_REG_SIZE * index)

	#define WRITE_CSR_ME2FUNCTION_MAP_B(pmisc_bar_addr, index, value) \
	ADF_CSR_WR(pmisc_bar_addr, ME2FUNCTION_MAP_B_OFFSET + \
	ME2FUNCTION_MAP_REG_SIZE * index, value)

	struct adf_pf2vf_resp {
	struct work_struct pf2vf_resp_work;
	struct adf_accel_vf_info *vf_info;
	};

	static void adf_iov_send_resp(struct work_struct *work)
	{
	struct adf_pf2vf_resp *pf2vf_resp =
	container_of(work, struct adf_pf2vf_resp, pf2vf_resp_work);

	adf_vf2pf_req_hndl(pf2vf_resp->vf_info);
	kfree(pf2vf_resp);
	}

	static void adf_vf2pf_bh_handler(void *data)
	{
	struct adf_accel_vf_info vf_info = (struct adf_accel_vf_info )data;
	struct adf_pf2vf_resp *pf2vf_resp;

	pf2vf_resp = kzalloc(sizeof(*pf2vf_resp), GFP_ATOMIC);
	if (!pf2vf_resp)
	return;

	pf2vf_resp->vf_info = vf_info;
	INIT_WORK(&pf2vf_resp->pf2vf_resp_work, adf_iov_send_resp);
	queue_work(pf2vf_resp_wq, &pf2vf_resp->pf2vf_resp_work);
	}

	static int adf_enable_sriov(struct adf_accel_dev *accel_dev)
	{
	struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
	int totalvfs = pci_sriov_get_totalvfs(pdev);
	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
	struct adf_bar *pmisc =
	&GET_BARS(accel_dev)[hw_data->get_misc_bar_id(hw_data)];
	void __iomem *pmisc_addr = pmisc->virt_addr;
	struct adf_accel_vf_info *vf_info;
	int i;
	u32 reg;

	for (i = 0, vf_info = accel_dev->pf.vf_info; i < totalvfs;
	i++, vf_info++) {
	/* This ptr will be populated when VFs will be created */
	vf_info->accel_dev = accel_dev;
	vf_info->vf_nr = i;

	tasklet_init(&vf_info->vf2pf_bh_tasklet,
	(void *)adf_vf2pf_bh_handler,
	(unsigned long)vf_info);
	mutex_init(&vf_info->pf2vf_lock);
	ratelimit_state_init(&vf_info->vf2pf_ratelimit,
	DEFAULT_RATELIMIT_INTERVAL,
	DEFAULT_RATELIMIT_BURST);
	}

	/* Set Valid bits in ME Thread to PCIe Function Mapping Group A */
	for (i = 0; i < ME2FUNCTION_MAP_A_NUM_REGS; i++) {
	reg = READ_CSR_ME2FUNCTION_MAP_A(pmisc_addr, i);
	reg \|= ME2FUNCTION_MAP_VALID;
	WRITE_CSR_ME2FUNCTION_MAP_A(pmisc_addr, i, reg);
	}

	/* Set Valid bits in ME Thread to PCIe Function Mapping Group B */
	for (i = 0; i < ME2FUNCTION_MAP_B_NUM_REGS; i++) {
	reg = READ_CSR_ME2FUNCTION_MAP_B(pmisc_addr, i);
	reg \|= ME2FUNCTION_MAP_VALID;
	WRITE_CSR_ME2FUNCTION_MAP_B(pmisc_addr, i, reg);
	}

	/* Enable VF to PF interrupts for all VFs */
	adf_enable_vf2pf_interrupts(accel_dev, GENMASK_ULL(totalvfs - 1, 0));

	/*
	* Due to the hardware design, when SR-IOV and the ring arbiter
	* are enabled all the VFs supported in hardware must be enabled in
	* order for all the hardware resources (i.e. bundles) to be usable.
	* When SR-IOV is enabled, each of the VFs will own one bundle.
	*/
	return pci_enable_sriov(pdev, totalvfs);
	}

	/**
	* adf_disable_sriov() - Disable SRIOV for the device
	* @accel_dev: Pointer to accel device.
	*
	* Function disables SRIOV for the accel device.
	*
	* Return: 0 on success, error code otherwise.
	*/
	void adf_disable_sriov(struct adf_accel_dev *accel_dev)
	{
	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
	struct adf_bar *pmisc =
	&GET_BARS(accel_dev)[hw_data->get_misc_bar_id(hw_data)];
	void __iomem *pmisc_addr = pmisc->virt_addr;
	int totalvfs = pci_sriov_get_totalvfs(accel_to_pci_dev(accel_dev));
	struct adf_accel_vf_info *vf;
	u32 reg;
	int i;

	if (!accel_dev->pf.vf_info)
	return;

	adf_pf2vf_notify_restarting(accel_dev);

	pci_disable_sriov(accel_to_pci_dev(accel_dev));

	/* Disable VF to PF interrupts */
	adf_disable_vf2pf_interrupts(accel_dev, 0xFFFFFFFF);

	/* Clear Valid bits in ME Thread to PCIe Function Mapping Group A */
	for (i = 0; i < ME2FUNCTION_MAP_A_NUM_REGS; i++) {
	reg = READ_CSR_ME2FUNCTION_MAP_A(pmisc_addr, i);
	reg &= ~ME2FUNCTION_MAP_VALID;
	WRITE_CSR_ME2FUNCTION_MAP_A(pmisc_addr, i, reg);
	}

	/* Clear Valid bits in ME Thread to PCIe Function Mapping Group B */
	for (i = 0; i < ME2FUNCTION_MAP_B_NUM_REGS; i++) {
	reg = READ_CSR_ME2FUNCTION_MAP_B(pmisc_addr, i);
	reg &= ~ME2FUNCTION_MAP_VALID;
	WRITE_CSR_ME2FUNCTION_MAP_B(pmisc_addr, i, reg);
	}

	for (i = 0, vf = accel_dev->pf.vf_info; i < totalvfs; i++, vf++) {
	tasklet_disable(&vf->vf2pf_bh_tasklet);
	tasklet_kill(&vf->vf2pf_bh_tasklet);
	mutex_destroy(&vf->pf2vf_lock);
	}

	kfree(accel_dev->pf.vf_info);
	accel_dev->pf.vf_info = NULL;
	}
	EXPORT_SYMBOL_GPL(adf_disable_sriov);

	/**
	* adf_sriov_configure() - Enable SRIOV for the device
	* @pdev: Pointer to pci device.
	* @numvfs: Number of virtual functions (VFs) to enable.
	*
	* Note that the @numvfs parameter is ignored and all VFs supported by the
	* device are enabled due to the design of the hardware.
	*
	* Function enables SRIOV for the pci device.
	*
	* Return: number of VFs enabled on success, error code otherwise.
	*/
	int adf_sriov_configure(struct pci_dev *pdev, int numvfs)
	{
	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
	int totalvfs = pci_sriov_get_totalvfs(pdev);
	unsigned long val;
	int ret;

	if (!accel_dev) {
	dev_err(&pdev->dev, "Failed to find accel_dev\n");
	return -EFAULT;
	}

	if (!iommu_present(&pci_bus_type))
	dev_warn(&pdev->dev, "IOMMU should be enabled for SR-IOV to work correctly\n");

	if (accel_dev->pf.vf_info) {
	dev_info(&pdev->dev, "Already enabled for this device\n");
	return -EINVAL;
	}

	if (adf_dev_started(accel_dev)) {
	if (adf_devmgr_in_reset(accel_dev) \|\|
	adf_dev_in_use(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "Device busy\n");
	return -EBUSY;
	}

	adf_dev_stop(accel_dev);
	adf_dev_shutdown(accel_dev);
	}

	if (adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC))
	return -EFAULT;
	val = 0;
	if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
	ADF_NUM_CY, (void *)&val, ADF_DEC))
	return -EFAULT;

	set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);

	/* Allocate memory for VF info structs */
	accel_dev->pf.vf_info = kcalloc(totalvfs,
	sizeof(struct adf_accel_vf_info),
	GFP_KERNEL);
	if (!accel_dev->pf.vf_info)
	return -ENOMEM;

	if (adf_dev_init(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "Failed to init qat_dev%d\n",
	accel_dev->accel_id);
	return -EFAULT;
	}

	if (adf_dev_start(accel_dev)) {
	dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
	accel_dev->accel_id);
	return -EFAULT;
	}

	ret = adf_enable_sriov(accel_dev);
	if (ret)
	return ret;

	return numvfs;
	}
	EXPORT_SYMBOL_GPL(adf_sriov_configure);

	int __init adf_init_pf_wq(void)
	{
	/* Workqueue for PF2VF responses */
	pf2vf_resp_wq = alloc_workqueue("qat_pf2vf_resp_wq", WQ_MEM_RECLAIM, 0);

	return !pf2vf_resp_wq ? -ENOMEM : 0;
	}

	void adf_exit_pf_wq(void)
	{
	if (pf2vf_resp_wq) {
	destroy_workqueue(pf2vf_resp_wq);
	pf2vf_resp_wq = NULL;
	}
	}