250 lines
6.5 KiB
C
250 lines
6.5 KiB
C
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
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/* Copyright(c) 2015 - 2021 Intel Corporation */
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#include <linux/workqueue.h>
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#include <linux/pci.h>
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#include <linux/device.h>
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#include <linux/iommu.h>
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#include "adf_common_drv.h"
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#include "adf_cfg.h"
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#include "adf_pfvf_pf_msg.h"
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#define ADF_VF2PF_RATELIMIT_INTERVAL 8
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#define ADF_VF2PF_RATELIMIT_BURST 130
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static struct workqueue_struct *pf2vf_resp_wq;
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struct adf_pf2vf_resp {
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struct work_struct pf2vf_resp_work;
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struct adf_accel_vf_info *vf_info;
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};
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static void adf_iov_send_resp(struct work_struct *work)
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{
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struct adf_pf2vf_resp *pf2vf_resp =
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container_of(work, struct adf_pf2vf_resp, pf2vf_resp_work);
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struct adf_accel_vf_info *vf_info = pf2vf_resp->vf_info;
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struct adf_accel_dev *accel_dev = vf_info->accel_dev;
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u32 vf_nr = vf_info->vf_nr;
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bool ret;
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ret = adf_recv_and_handle_vf2pf_msg(accel_dev, vf_nr);
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if (ret)
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/* re-enable interrupt on PF from this VF */
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adf_enable_vf2pf_interrupts(accel_dev, 1 << vf_nr);
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kfree(pf2vf_resp);
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}
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void adf_schedule_vf2pf_handler(struct adf_accel_vf_info *vf_info)
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{
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struct adf_pf2vf_resp *pf2vf_resp;
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pf2vf_resp = kzalloc(sizeof(*pf2vf_resp), GFP_ATOMIC);
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if (!pf2vf_resp)
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return;
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pf2vf_resp->vf_info = vf_info;
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INIT_WORK(&pf2vf_resp->pf2vf_resp_work, adf_iov_send_resp);
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queue_work(pf2vf_resp_wq, &pf2vf_resp->pf2vf_resp_work);
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}
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static int adf_enable_sriov(struct adf_accel_dev *accel_dev)
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{
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struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
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int totalvfs = pci_sriov_get_totalvfs(pdev);
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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struct adf_accel_vf_info *vf_info;
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int i;
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for (i = 0, vf_info = accel_dev->pf.vf_info; i < totalvfs;
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i++, vf_info++) {
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/* This ptr will be populated when VFs will be created */
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vf_info->accel_dev = accel_dev;
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vf_info->vf_nr = i;
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vf_info->vf_compat_ver = 0;
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mutex_init(&vf_info->pf2vf_lock);
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ratelimit_state_init(&vf_info->vf2pf_ratelimit,
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ADF_VF2PF_RATELIMIT_INTERVAL,
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ADF_VF2PF_RATELIMIT_BURST);
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}
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/* Set Valid bits in AE Thread to PCIe Function Mapping */
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if (hw_data->configure_iov_threads)
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hw_data->configure_iov_threads(accel_dev, true);
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/* Enable VF to PF interrupts for all VFs */
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if (hw_data->pfvf_ops.get_pf2vf_offset)
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adf_enable_vf2pf_interrupts(accel_dev, BIT_ULL(totalvfs) - 1);
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/*
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* Due to the hardware design, when SR-IOV and the ring arbiter
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* are enabled all the VFs supported in hardware must be enabled in
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* order for all the hardware resources (i.e. bundles) to be usable.
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* When SR-IOV is enabled, each of the VFs will own one bundle.
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*/
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return pci_enable_sriov(pdev, totalvfs);
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}
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/**
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* adf_disable_sriov() - Disable SRIOV for the device
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* @accel_dev: Pointer to accel device.
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*
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* Function disables SRIOV for the accel device.
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*
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* Return: 0 on success, error code otherwise.
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*/
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void adf_disable_sriov(struct adf_accel_dev *accel_dev)
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{
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struct adf_hw_device_data *hw_data = accel_dev->hw_device;
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int totalvfs = pci_sriov_get_totalvfs(accel_to_pci_dev(accel_dev));
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struct adf_accel_vf_info *vf;
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int i;
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if (!accel_dev->pf.vf_info)
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return;
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if (hw_data->pfvf_ops.get_pf2vf_offset)
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adf_pf2vf_notify_restarting(accel_dev);
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pci_disable_sriov(accel_to_pci_dev(accel_dev));
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/* Disable VF to PF interrupts */
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if (hw_data->pfvf_ops.get_pf2vf_offset)
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adf_disable_vf2pf_interrupts(accel_dev, GENMASK(31, 0));
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/* Clear Valid bits in AE Thread to PCIe Function Mapping */
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if (hw_data->configure_iov_threads)
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hw_data->configure_iov_threads(accel_dev, false);
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for (i = 0, vf = accel_dev->pf.vf_info; i < totalvfs; i++, vf++) {
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mutex_destroy(&vf->pf2vf_lock);
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}
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kfree(accel_dev->pf.vf_info);
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accel_dev->pf.vf_info = NULL;
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}
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EXPORT_SYMBOL_GPL(adf_disable_sriov);
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static int adf_sriov_prepare_restart(struct adf_accel_dev *accel_dev)
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{
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char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
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int ret;
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ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
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ADF_SERVICES_ENABLED, services);
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adf_dev_stop(accel_dev);
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adf_dev_shutdown(accel_dev);
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if (!ret) {
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ret = adf_cfg_section_add(accel_dev, ADF_GENERAL_SEC);
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if (ret)
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return ret;
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ret = adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
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ADF_SERVICES_ENABLED,
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services, ADF_STR);
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if (ret)
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return ret;
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}
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return 0;
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}
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/**
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* adf_sriov_configure() - Enable SRIOV for the device
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* @pdev: Pointer to PCI device.
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* @numvfs: Number of virtual functions (VFs) to enable.
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*
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* Note that the @numvfs parameter is ignored and all VFs supported by the
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* device are enabled due to the design of the hardware.
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*
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* Function enables SRIOV for the PCI device.
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*
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* Return: number of VFs enabled on success, error code otherwise.
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*/
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int adf_sriov_configure(struct pci_dev *pdev, int numvfs)
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{
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struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
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int totalvfs = pci_sriov_get_totalvfs(pdev);
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unsigned long val;
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int ret;
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if (!accel_dev) {
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dev_err(&pdev->dev, "Failed to find accel_dev\n");
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return -EFAULT;
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}
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if (!iommu_present(&pci_bus_type))
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dev_warn(&pdev->dev, "IOMMU should be enabled for SR-IOV to work correctly\n");
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if (accel_dev->pf.vf_info) {
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dev_info(&pdev->dev, "Already enabled for this device\n");
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return -EINVAL;
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}
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if (adf_dev_started(accel_dev)) {
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if (adf_devmgr_in_reset(accel_dev) ||
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adf_dev_in_use(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Device busy\n");
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return -EBUSY;
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}
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ret = adf_sriov_prepare_restart(accel_dev);
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if (ret)
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return ret;
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}
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if (adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC))
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return -EFAULT;
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val = 0;
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if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
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ADF_NUM_CY, (void *)&val, ADF_DEC))
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return -EFAULT;
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set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
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/* Allocate memory for VF info structs */
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accel_dev->pf.vf_info = kcalloc(totalvfs,
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sizeof(struct adf_accel_vf_info),
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GFP_KERNEL);
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if (!accel_dev->pf.vf_info)
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return -ENOMEM;
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if (adf_dev_init(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed to init qat_dev%d\n",
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accel_dev->accel_id);
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return -EFAULT;
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}
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if (adf_dev_start(accel_dev)) {
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dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
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accel_dev->accel_id);
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return -EFAULT;
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}
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ret = adf_enable_sriov(accel_dev);
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if (ret)
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return ret;
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return numvfs;
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}
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EXPORT_SYMBOL_GPL(adf_sriov_configure);
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int __init adf_init_pf_wq(void)
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{
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/* Workqueue for PF2VF responses */
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pf2vf_resp_wq = alloc_workqueue("qat_pf2vf_resp_wq", WQ_MEM_RECLAIM, 0);
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return !pf2vf_resp_wq ? -ENOMEM : 0;
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}
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void adf_exit_pf_wq(void)
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{
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if (pf2vf_resp_wq) {
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destroy_workqueue(pf2vf_resp_wq);
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pf2vf_resp_wq = NULL;
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}
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}
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