[v3,10/10] vfio/qat: Add vfio_pci driver for Intel QAT VF devices

Message ID	20240221155008.960369-11-xin.zeng@intel.com (mailing list archive)
State	Superseded
Delegated to:	Herbert Xu
Headers	show Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BFED783CA8; Wed, 21 Feb 2024 15:59:27 +0000 (UTC) From: Xin Zeng <xin.zeng@intel.com> To: herbert@gondor.apana.org.au, alex.williamson@redhat.com, jgg@nvidia.com, yishaih@nvidia.com, shameerali.kolothum.thodi@huawei.com, kevin.tian@intel.com Cc: linux-crypto@vger.kernel.org, kvm@vger.kernel.org, qat-linux@intel.com, Xin Zeng <xin.zeng@intel.com>, Yahui Cao <yahui.cao@intel.com> Subject: [PATCH v3 10/10] vfio/qat: Add vfio_pci driver for Intel QAT VF devices Date: Wed, 21 Feb 2024 23:50:08 +0800 Message-Id: <20240221155008.960369-11-xin.zeng@intel.com> In-Reply-To: <20240221155008.960369-1-xin.zeng@intel.com> References: <20240221155008.960369-1-xin.zeng@intel.com> Precedence: bulk
Series	crypto: qat - enable QAT GEN4 SRIOV VF live migration for QAT GEN4 \| expand [v3,00/10] crypto: qat - enable QAT GEN4 SRIOV VF live migration for QAT GEN4 [v3,01/10] crypto: qat - adf_get_etr_base() helper [v3,02/10] crypto: qat - relocate and rename 4xxx PF2VM definitions [v3,03/10] crypto: qat - move PFVF compat checker to a function [v3,04/10] crypto: qat - relocate CSR access code [v3,05/10] crypto: qat - rename get_sla_arr_of_type() [v3,06/10] crypto: qat - expand CSR operations for QAT GEN4 devices [v3,07/10] crypto: qat - add bank save and restore flows [v3,08/10] crypto: qat - add interface for live migration [v3,09/10] crypto: qat - implement interface for live migration [v3,10/10] vfio/qat: Add vfio_pci driver for Intel QAT VF devices

diff --git a/MAINTAINERS b/MAINTAINERS index 5a4051996f1e..8961c7033b31 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -23099,6 +23099,14 @@ S: Maintained F: Documentation/networking/device_drivers/ethernet/amd/pds_vfio_pci.rst F: drivers/vfio/pci/pds/ +VFIO QAT PCI DRIVER +M: Xin Zeng <xin.zeng@intel.com> +M: Giovanni Cabiddu <giovanni.cabiddu@intel.com> +L: kvm@vger.kernel.org +L: qat-linux@intel.com +S: Supported +F: drivers/vfio/pci/intel/qat/ + VFIO PLATFORM DRIVER M: Eric Auger <eric.auger@redhat.com> L: kvm@vger.kernel.org diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index 18c397df566d..329d25c53274 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -67,4 +67,6 @@ source "drivers/vfio/pci/pds/Kconfig" source "drivers/vfio/pci/virtio/Kconfig" +source "drivers/vfio/pci/intel/qat/Kconfig" + endmenu diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile index 046139a4eca5..a87b6b43ce1c 100644 --- a/drivers/vfio/pci/Makefile +++ b/drivers/vfio/pci/Makefile @@ -15,3 +15,5 @@ obj-$(CONFIG_HISI_ACC_VFIO_PCI) += hisilicon/ obj-$(CONFIG_PDS_VFIO_PCI) += pds/ obj-$(CONFIG_VIRTIO_VFIO_PCI) += virtio/ + +obj-$(CONFIG_QAT_VFIO_PCI) += intel/qat/ diff --git a/drivers/vfio/pci/intel/qat/Kconfig b/drivers/vfio/pci/intel/qat/Kconfig new file mode 100644 index 000000000000..bf52cfa4b595 --- /dev/null +++ b/drivers/vfio/pci/intel/qat/Kconfig @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0-only +config QAT_VFIO_PCI + tristate "VFIO support for QAT VF PCI devices" + select VFIO_PCI_CORE + depends on CRYPTO_DEV_QAT_4XXX + help + This provides migration support for Intel(R) QAT Virtual Function + using the VFIO framework. + + To compile this as a module, choose M here: the module + will be called qat_vfio_pci. If you don't know what to do here, + say N. diff --git a/drivers/vfio/pci/intel/qat/Makefile b/drivers/vfio/pci/intel/qat/Makefile new file mode 100644 index 000000000000..5fe5c4ec19d3 --- /dev/null +++ b/drivers/vfio/pci/intel/qat/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_QAT_VFIO_PCI) += qat_vfio_pci.o +qat_vfio_pci-y := main.o diff --git a/drivers/vfio/pci/intel/qat/main.c b/drivers/vfio/pci/intel/qat/main.c new file mode 100644 index 000000000000..4937bdb650f9 --- /dev/null +++ b/drivers/vfio/pci/intel/qat/main.c @@ -0,0 +1,663 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright(c) 2024 Intel Corporation */ + +#include <linux/anon_inodes.h> +#include <linux/container_of.h> +#include <linux/device.h> +#include <linux/file.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/pci.h> +#include <linux/sizes.h> +#include <linux/types.h> +#include <linux/uaccess.h> +#include <linux/vfio_pci_core.h> +#include <linux/qat/qat_mig_dev.h> + +struct qat_vf_migration_file { + struct file *filp; + /* protects migration region context */ + struct mutex lock; + bool disabled; + struct qat_vf_core_device *qat_vdev; + ssize_t filled_size; +}; + +struct qat_vf_core_device { + struct vfio_pci_core_device core_device; + struct qat_mig_dev *mdev; + /* protects migration state */ + struct mutex state_mutex; + enum vfio_device_mig_state mig_state; + struct qat_vf_migration_file *resuming_migf; + struct qat_vf_migration_file *saving_migf; +}; + +static int qat_vf_pci_open_device(struct vfio_device *core_vdev) +{ + struct qat_vf_core_device *qat_vdev = + container_of(core_vdev, struct qat_vf_core_device, + core_device.vdev); + struct vfio_pci_core_device *vdev = &qat_vdev->core_device; + int ret; + + ret = vfio_pci_core_enable(vdev); + if (ret) + return ret; + + ret = qat_vfmig_open(qat_vdev->mdev); + if (ret) { + vfio_pci_core_disable(vdev); + return ret; + } + qat_vdev->mig_state = VFIO_DEVICE_STATE_RUNNING; + + vfio_pci_core_finish_enable(vdev); + + return 0; +} + +static void qat_vf_disable_fd(struct qat_vf_migration_file *migf) +{ + mutex_lock(&migf->lock); + migf->disabled = true; + migf->filp->f_pos = 0; + migf->filled_size = 0; + mutex_unlock(&migf->lock); +} + +static void qat_vf_disable_fds(struct qat_vf_core_device *qat_vdev) +{ + if (qat_vdev->resuming_migf) { + qat_vf_disable_fd(qat_vdev->resuming_migf); + fput(qat_vdev->resuming_migf->filp); + qat_vdev->resuming_migf = NULL; + } + + if (qat_vdev->saving_migf) { + qat_vf_disable_fd(qat_vdev->saving_migf); + fput(qat_vdev->saving_migf->filp); + qat_vdev->saving_migf = NULL; + } +} + +static void qat_vf_pci_close_device(struct vfio_device *core_vdev) +{ + struct qat_vf_core_device *qat_vdev = container_of(core_vdev, + struct qat_vf_core_device, core_device.vdev); + + qat_vfmig_close(qat_vdev->mdev); + qat_vf_disable_fds(qat_vdev); + vfio_pci_core_close_device(core_vdev); +} + +static long qat_vf_precopy_ioctl(struct file *filp, + unsigned int cmd, unsigned long arg) +{ + struct qat_vf_migration_file *migf = filp->private_data; + struct qat_vf_core_device *qat_vdev = migf->qat_vdev; + struct qat_mig_dev *mig_dev = qat_vdev->mdev; + struct vfio_precopy_info info; + loff_t *pos = &filp->f_pos; + unsigned long minsz; + int ret; + + if (cmd != VFIO_MIG_GET_PRECOPY_INFO) + return -ENOTTY; + + minsz = offsetofend(struct vfio_precopy_info, dirty_bytes); + + if (copy_from_user(&info, (void __user *)arg, minsz)) + return -EFAULT; + if (info.argsz < minsz) + return -EINVAL; + + mutex_lock(&qat_vdev->state_mutex); + if (qat_vdev->mig_state != VFIO_DEVICE_STATE_PRE_COPY) { + mutex_unlock(&qat_vdev->state_mutex); + return -EINVAL; + } + + mutex_lock(&migf->lock); + if (migf->disabled) { + ret = -ENODEV; + goto err; + } + + if (*pos > mig_dev->setup_size) { + ret = -EINVAL; + goto err; + } + + info.dirty_bytes = 0; + info.initial_bytes = mig_dev->setup_size - *pos; + mutex_unlock(&migf->lock); + mutex_unlock(&qat_vdev->state_mutex); + + return copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0; + +err: + mutex_unlock(&migf->lock); + mutex_unlock(&qat_vdev->state_mutex); + return ret; +} + +static ssize_t qat_vf_save_read(struct file *filp, char __user *buf, + size_t len, loff_t *pos) +{ + struct qat_vf_migration_file *migf = filp->private_data; + struct qat_mig_dev *mig_dev = migf->qat_vdev->mdev; + ssize_t done = 0; + loff_t *offs; + int ret; + + if (pos) + return -ESPIPE; + offs = &filp->f_pos; + + mutex_lock(&migf->lock); + if (*offs > migf->filled_size || *offs < 0) { + done = -EINVAL; + goto out_unlock; + } + + if (migf->disabled) { + done = -ENODEV; + goto out_unlock; + } + + len = min_t(size_t, migf->filled_size - *offs, len); + if (len) { + ret = copy_to_user(buf, mig_dev->state + *offs, len); + if (ret) { + done = -EFAULT; + goto out_unlock; + } + *offs += len; + done = len; + } + +out_unlock: + mutex_unlock(&migf->lock); + return done; +} + +static int qat_vf_release_file(struct inode *inode, struct file *filp) +{ + struct qat_vf_migration_file *migf = filp->private_data; + + qat_vf_disable_fd(migf); + mutex_destroy(&migf->lock); + kfree(migf); + + return 0; +} + +static const struct file_operations qat_vf_save_fops = { + .owner = THIS_MODULE, + .read = qat_vf_save_read, + .unlocked_ioctl = qat_vf_precopy_ioctl, + .compat_ioctl = compat_ptr_ioctl, + .release = qat_vf_release_file, + .llseek = no_llseek, +}; + +static int qat_vf_save_state(struct qat_vf_core_device *qat_vdev, + struct qat_vf_migration_file *migf) +{ + int ret; + + ret = qat_vfmig_save_state(qat_vdev->mdev); + if (ret) + return ret; + migf->filled_size = qat_vdev->mdev->state_size; + + return 0; +} + +static int qat_vf_save_setup(struct qat_vf_core_device *qat_vdev, + struct qat_vf_migration_file *migf) +{ + int ret; + + ret = qat_vfmig_save_setup(qat_vdev->mdev); + if (ret) + return ret; + migf->filled_size = qat_vdev->mdev->setup_size; + + return 0; +} + +static struct qat_vf_migration_file * +qat_vf_save_device_data(struct qat_vf_core_device *qat_vdev, bool pre_copy) +{ + struct qat_vf_migration_file *migf; + int ret; + + migf = kzalloc(sizeof(*migf), GFP_KERNEL); + if (!migf) + return ERR_PTR(-ENOMEM); + + migf->filp = anon_inode_getfile("qat_vf_mig", &qat_vf_save_fops, + migf, O_RDONLY); + ret = PTR_ERR_OR_ZERO(migf->filp); + if (ret) { + kfree(migf); + return ERR_PTR(ret); + } + + stream_open(migf->filp->f_inode, migf->filp); + mutex_init(&migf->lock); + + if (pre_copy) + ret = qat_vf_save_setup(qat_vdev, migf); + else + ret = qat_vf_save_state(qat_vdev, migf); + if (ret) { + fput(migf->filp); + return ERR_PTR(ret); + } + + migf->qat_vdev = qat_vdev; + + return migf; +} + +static ssize_t qat_vf_resume_write(struct file *filp, const char __user *buf, + size_t len, loff_t *pos) +{ + struct qat_vf_migration_file *migf = filp->private_data; + struct qat_mig_dev *mig_dev = migf->qat_vdev->mdev; + loff_t end, *offs; + ssize_t done = 0; + int ret; + + if (pos) + return -ESPIPE; + offs = &filp->f_pos; + + if (*offs < 0 || + check_add_overflow((loff_t)len, *offs, &end)) + return -EOVERFLOW; + + if (end > mig_dev->state_size) + return -ENOMEM; + + mutex_lock(&migf->lock); + if (migf->disabled) { + done = -ENODEV; + goto out_unlock; + } + + ret = copy_from_user(mig_dev->state + *offs, buf, len); + if (ret) { + done = -EFAULT; + goto out_unlock; + } + *offs += len; + migf->filled_size += len; + + ret = qat_vfmig_load_setup(mig_dev, migf->filled_size); + if (ret && ret != -EAGAIN) { + done = ret; + goto out_unlock; + } + done = len; + +out_unlock: + mutex_unlock(&migf->lock); + return done; +} + +static const struct file_operations qat_vf_resume_fops = { + .owner = THIS_MODULE, + .write = qat_vf_resume_write, + .release = qat_vf_release_file, + .llseek = no_llseek, +}; + +static struct qat_vf_migration_file * +qat_vf_resume_device_data(struct qat_vf_core_device *qat_vdev) +{ + struct qat_vf_migration_file *migf; + int ret; + + migf = kzalloc(sizeof(*migf), GFP_KERNEL); + if (!migf) + return ERR_PTR(-ENOMEM); + + migf->filp = anon_inode_getfile("qat_vf_mig", &qat_vf_resume_fops, migf, O_WRONLY); + ret = PTR_ERR_OR_ZERO(migf->filp); + if (ret) { + kfree(migf); + return ERR_PTR(ret); + } + + migf->qat_vdev = qat_vdev; + migf->filled_size = 0; + stream_open(migf->filp->f_inode, migf->filp); + mutex_init(&migf->lock); + + return migf; +} + +static int qat_vf_load_device_data(struct qat_vf_core_device *qat_vdev) +{ + return qat_vfmig_load_state(qat_vdev->mdev); +} + +static struct file *qat_vf_pci_step_device_state(struct qat_vf_core_device *qat_vdev, u32 new) +{ + u32 cur = qat_vdev->mig_state; + int ret; + + if ((cur == VFIO_DEVICE_STATE_RUNNING && new == VFIO_DEVICE_STATE_RUNNING_P2P) || + (cur == VFIO_DEVICE_STATE_PRE_COPY && new == VFIO_DEVICE_STATE_PRE_COPY_P2P)) { + ret = qat_vfmig_suspend(qat_vdev->mdev); + if (ret) + return ERR_PTR(ret); + return NULL; + } + + if ((cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_STOP) || + (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RUNNING_P2P)) + return NULL; + + if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_STOP_COPY) { + struct qat_vf_migration_file *migf; + + migf = qat_vf_save_device_data(qat_vdev, false); + if (IS_ERR(migf)) + return ERR_CAST(migf); + get_file(migf->filp); + qat_vdev->saving_migf = migf; + return migf->filp; + } + + if (cur == VFIO_DEVICE_STATE_PRE_COPY_P2P && new == VFIO_DEVICE_STATE_STOP_COPY) { + struct qat_vf_migration_file *migf = qat_vdev->saving_migf; + + if (!migf) + return ERR_PTR(-EINVAL); + ret = qat_vf_save_state(qat_vdev, migf); + if (ret) + return ERR_PTR(ret); + return NULL; + } + + if ((cur == VFIO_DEVICE_STATE_STOP_COPY && new == VFIO_DEVICE_STATE_STOP) || + (cur == VFIO_DEVICE_STATE_PRE_COPY && new == VFIO_DEVICE_STATE_RUNNING) || + (cur == VFIO_DEVICE_STATE_PRE_COPY_P2P && new == VFIO_DEVICE_STATE_RUNNING_P2P)) { + qat_vf_disable_fds(qat_vdev); + return NULL; + } + + if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RESUMING) { + struct qat_vf_migration_file *migf; + + migf = qat_vf_resume_device_data(qat_vdev); + if (IS_ERR(migf)) + return ERR_CAST(migf); + get_file(migf->filp); + qat_vdev->resuming_migf = migf; + return migf->filp; + } + + if (cur == VFIO_DEVICE_STATE_RESUMING && new == VFIO_DEVICE_STATE_STOP) { + ret = qat_vf_load_device_data(qat_vdev); + if (ret) + return ERR_PTR(ret); + + qat_vf_disable_fds(qat_vdev); + return NULL; + } + + if ((cur == VFIO_DEVICE_STATE_RUNNING && new == VFIO_DEVICE_STATE_PRE_COPY) || + (cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_PRE_COPY_P2P)) { + struct qat_vf_migration_file *migf; + + migf = qat_vf_save_device_data(qat_vdev, true); + if (IS_ERR(migf)) + return ERR_CAST(migf); + get_file(migf->filp); + qat_vdev->saving_migf = migf; + return migf->filp; + } + + if ((cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_RUNNING) || + (cur == VFIO_DEVICE_STATE_PRE_COPY_P2P && new == VFIO_DEVICE_STATE_PRE_COPY)) { + qat_vfmig_resume(qat_vdev->mdev); + return NULL; + } + + /* vfio_mig_get_next_state() does not use arcs other than the above */ + WARN_ON(true); + return ERR_PTR(-EINVAL); +} + +static void qat_vf_reset_done(struct qat_vf_core_device *qat_vdev) +{ + qat_vdev->mig_state = VFIO_DEVICE_STATE_RUNNING; + qat_vfmig_reset(qat_vdev->mdev); + qat_vf_disable_fds(qat_vdev); +} + +static struct file *qat_vf_pci_set_device_state(struct vfio_device *vdev, + enum vfio_device_mig_state new_state) +{ + struct qat_vf_core_device *qat_vdev = container_of(vdev, + struct qat_vf_core_device, core_device.vdev); + enum vfio_device_mig_state next_state; + struct file *res = NULL; + int ret; + + mutex_lock(&qat_vdev->state_mutex); + while (new_state != qat_vdev->mig_state) { + ret = vfio_mig_get_next_state(vdev, qat_vdev->mig_state, + new_state, &next_state); + if (ret) { + res = ERR_PTR(ret); + break; + } + res = qat_vf_pci_step_device_state(qat_vdev, next_state); + if (IS_ERR(res)) + break; + qat_vdev->mig_state = next_state; + if (WARN_ON(res && new_state != qat_vdev->mig_state)) { + fput(res); + res = ERR_PTR(-EINVAL); + break; + } + } + mutex_unlock(&qat_vdev->state_mutex); + + return res; +} + +static int qat_vf_pci_get_device_state(struct vfio_device *vdev, + enum vfio_device_mig_state *curr_state) +{ + struct qat_vf_core_device *qat_vdev = container_of(vdev, + struct qat_vf_core_device, core_device.vdev); + + mutex_lock(&qat_vdev->state_mutex); + *curr_state = qat_vdev->mig_state; + mutex_unlock(&qat_vdev->state_mutex); + + return 0; +} + +static int qat_vf_pci_get_data_size(struct vfio_device *vdev, + unsigned long *stop_copy_length) +{ + struct qat_vf_core_device *qat_vdev = container_of(vdev, + struct qat_vf_core_device, core_device.vdev); + + mutex_lock(&qat_vdev->state_mutex); + *stop_copy_length = qat_vdev->mdev->state_size; + mutex_unlock(&qat_vdev->state_mutex); + + return 0; +} + +static const struct vfio_migration_ops qat_vf_pci_mig_ops = { + .migration_set_state = qat_vf_pci_set_device_state, + .migration_get_state = qat_vf_pci_get_device_state, + .migration_get_data_size = qat_vf_pci_get_data_size, +}; + +static void qat_vf_pci_release_dev(struct vfio_device *core_vdev) +{ + struct qat_vf_core_device *qat_vdev = container_of(core_vdev, + struct qat_vf_core_device, core_device.vdev); + + qat_vfmig_cleanup(qat_vdev->mdev); + qat_vfmig_destroy(qat_vdev->mdev); + mutex_destroy(&qat_vdev->state_mutex); + vfio_pci_core_release_dev(core_vdev); +} + +static int qat_vf_pci_init_dev(struct vfio_device *core_vdev) +{ + struct qat_vf_core_device *qat_vdev = container_of(core_vdev, + struct qat_vf_core_device, core_device.vdev); + struct qat_mig_dev *mdev; + struct pci_dev *parent; + int ret, vf_id; + + core_vdev->migration_flags = VFIO_MIGRATION_STOP_COPY | VFIO_MIGRATION_P2P | + VFIO_MIGRATION_PRE_COPY; + core_vdev->mig_ops = &qat_vf_pci_mig_ops; + + ret = vfio_pci_core_init_dev(core_vdev); + if (ret) + return ret; + + mutex_init(&qat_vdev->state_mutex); + + parent = pci_physfn(qat_vdev->core_device.pdev); + vf_id = pci_iov_vf_id(qat_vdev->core_device.pdev); + if (vf_id < 0) { + ret = -ENODEV; + goto err_rel; + } + + mdev = qat_vfmig_create(parent, vf_id); + if (IS_ERR(mdev)) { + ret = PTR_ERR(mdev); + goto err_rel; + } + + ret = qat_vfmig_init(mdev); + if (ret) + goto err_destroy; + + qat_vdev->mdev = mdev; + + return 0; + +err_destroy: + qat_vfmig_destroy(mdev); +err_rel: + vfio_pci_core_release_dev(core_vdev); + return ret; +} + +static const struct vfio_device_ops qat_vf_pci_ops = { + .name = "qat-vf-vfio-pci", + .init = qat_vf_pci_init_dev, + .release = qat_vf_pci_release_dev, + .open_device = qat_vf_pci_open_device, + .close_device = qat_vf_pci_close_device, + .ioctl = vfio_pci_core_ioctl, + .read = vfio_pci_core_read, + .write = vfio_pci_core_write, + .mmap = vfio_pci_core_mmap, + .request = vfio_pci_core_request, + .match = vfio_pci_core_match, + .bind_iommufd = vfio_iommufd_physical_bind, + .unbind_iommufd = vfio_iommufd_physical_unbind, + .attach_ioas = vfio_iommufd_physical_attach_ioas, + .detach_ioas = vfio_iommufd_physical_detach_ioas, +}; + +static struct qat_vf_core_device *qat_vf_drvdata(struct pci_dev *pdev) +{ + struct vfio_pci_core_device *core_device = pci_get_drvdata(pdev); + + return container_of(core_device, struct qat_vf_core_device, core_device); +} + +static void qat_vf_pci_aer_reset_done(struct pci_dev *pdev) +{ + struct qat_vf_core_device *qat_vdev = qat_vf_drvdata(pdev); + + if (!qat_vdev->mdev) + return; + + mutex_lock(&qat_vdev->state_mutex); + qat_vf_reset_done(qat_vdev); + mutex_unlock(&qat_vdev->state_mutex); +} + +static int +qat_vf_vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct device *dev = &pdev->dev; + struct qat_vf_core_device *qat_vdev; + int ret; + + qat_vdev = vfio_alloc_device(qat_vf_core_device, core_device.vdev, dev, &qat_vf_pci_ops); + if (IS_ERR(qat_vdev)) + return PTR_ERR(qat_vdev); + + pci_set_drvdata(pdev, &qat_vdev->core_device); + ret = vfio_pci_core_register_device(&qat_vdev->core_device); + if (ret) + goto out_put_device; + + return 0; + +out_put_device: + vfio_put_device(&qat_vdev->core_device.vdev); + return ret; +} + +static void qat_vf_vfio_pci_remove(struct pci_dev *pdev) +{ + struct qat_vf_core_device *qat_vdev = qat_vf_drvdata(pdev); + + vfio_pci_core_unregister_device(&qat_vdev->core_device); + vfio_put_device(&qat_vdev->core_device.vdev); +} + +static const struct pci_device_id qat_vf_vfio_pci_table[] = { + /* Intel QAT GEN4 4xxx VF device */ + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_INTEL, 0x4941) }, + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_INTEL, 0x4943) }, + { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_INTEL, 0x4945) }, + {} +}; +MODULE_DEVICE_TABLE(pci, qat_vf_vfio_pci_table); + +static const struct pci_error_handlers qat_vf_err_handlers = { + .reset_done = qat_vf_pci_aer_reset_done, + .error_detected = vfio_pci_core_aer_err_detected, +}; + +static struct pci_driver qat_vf_vfio_pci_driver = { + .name = "qat_vfio_pci", + .id_table = qat_vf_vfio_pci_table, + .probe = qat_vf_vfio_pci_probe, + .remove = qat_vf_vfio_pci_remove, + .err_handler = &qat_vf_err_handlers, + .driver_managed_dma = true, +}; +module_pci_driver(qat_vf_vfio_pci_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Intel Corporation"); +MODULE_DESCRIPTION("QAT VFIO PCI - VFIO PCI driver with live migration support for Intel(R) QAT GEN4 device family"); +MODULE_IMPORT_NS(CRYPTO_QAT);

[v3,10/10] vfio/qat: Add vfio_pci driver for Intel QAT VF devices

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