diff options
Diffstat (limited to 'drivers/crypto/qat/qat_common/adf_sriov.c')
| -rw-r--r-- | drivers/crypto/qat/qat_common/adf_sriov.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/crypto/qat/qat_common/adf_sriov.c b/drivers/crypto/qat/qat_common/adf_sriov.c new file mode 100644 index 000000000..b2db1d70d --- /dev/null +++ b/drivers/crypto/qat/qat_common/adf_sriov.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) +/* Copyright(c) 2015 - 2021 Intel Corporation */ +#include <linux/workqueue.h> +#include <linux/pci.h> +#include <linux/device.h> +#include "adf_common_drv.h" +#include "adf_cfg.h" +#include "adf_pfvf_pf_msg.h" + +#define ADF_VF2PF_RATELIMIT_INTERVAL 8 +#define ADF_VF2PF_RATELIMIT_BURST 130 + +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); + struct adf_accel_vf_info *vf_info = pf2vf_resp->vf_info; + struct adf_accel_dev *accel_dev = vf_info->accel_dev; + u32 vf_nr = vf_info->vf_nr; + bool ret; + + ret = adf_recv_and_handle_vf2pf_msg(accel_dev, vf_nr); + if (ret) + /* re-enable interrupt on PF from this VF */ + adf_enable_vf2pf_interrupts(accel_dev, 1 << vf_nr); + + kfree(pf2vf_resp); +} + +void adf_schedule_vf2pf_handler(struct adf_accel_vf_info *vf_info) +{ + 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; + vf_info->vf_compat_ver = 0; + + mutex_init(&vf_info->pf2vf_lock); + ratelimit_state_init(&vf_info->vf2pf_ratelimit, + ADF_VF2PF_RATELIMIT_INTERVAL, + ADF_VF2PF_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 */ + 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; + + adf_pf2vf_notify_restarting(accel_dev); + pci_disable_sriov(accel_to_pci_dev(accel_dev)); + + /* Disable VF to PF interrupts */ + adf_disable_all_vf2pf_interrupts(accel_dev); + + /* 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++) + 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 (!device_iommu_mapped(&pdev->dev)) + 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; + } + + ret = adf_dev_shutdown_cache_cfg(accel_dev); + if (ret) + return ret; + } + + 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; + } +} |