diff options
Diffstat (limited to 'drivers/crypto/qat/qat_common/adf_sriov.c')
| -rw-r--r-- | drivers/crypto/qat/qat_common/adf_sriov.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/drivers/crypto/qat/qat_common/adf_sriov.c b/drivers/crypto/qat/qat_common/adf_sriov.c deleted file mode 100644 index 8c822c2861c2..000000000000 --- a/drivers/crypto/qat/qat_common/adf_sriov.c +++ /dev/null @@ -1,216 +0,0 @@ -// 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; - -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_accel_vf_info *vf_info; - int i; - - 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 AE Thread to PCIe Function Mapping */ - if (hw_data->configure_iov_threads) - hw_data->configure_iov_threads(accel_dev, true); - - /* Enable VF to PF interrupts for all VFs */ - if (hw_data->get_pf2vf_offset) - adf_enable_vf2pf_interrupts(accel_dev, BIT_ULL(totalvfs) - 1); - - /* - * 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; - int totalvfs = pci_sriov_get_totalvfs(accel_to_pci_dev(accel_dev)); - struct adf_accel_vf_info *vf; - int i; - - if (!accel_dev->pf.vf_info) - return; - - if (hw_data->get_pf2vf_offset) - adf_pf2vf_notify_restarting(accel_dev); - - pci_disable_sriov(accel_to_pci_dev(accel_dev)); - - /* Disable VF to PF interrupts */ - if (hw_data->get_pf2vf_offset) - adf_disable_vf2pf_interrupts(accel_dev, GENMASK(31, 0)); - - /* Clear Valid bits in AE Thread to PCIe Function Mapping */ - if (hw_data->configure_iov_threads) - hw_data->configure_iov_threads(accel_dev, false); - - 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; - } -} |