[12/12] vfio/pci: Introduce vfio_pci_core.ko

Message ID	20210721161609.68223-13-yishaih@nvidia.com (mailing list archive)
State	Superseded
Delegated to:	Bjorn Helgaas
Headers	show Return-Path: <linux-pci-owner@kernel.org> Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.112.36 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.112.36; helo=mail.nvidia.com; From: Yishai Hadas <yishaih@nvidia.com> To: <bhelgaas@google.com>, <corbet@lwn.net>, <alex.williamson@redhat.com>, <diana.craciun@oss.nxp.com>, <kwankhede@nvidia.com>, <eric.auger@redhat.com>, <masahiroy@kernel.org>, <michal.lkml@markovi.net> CC: <linux-pci@vger.kernel.org>, <linux-doc@vger.kernel.org>, <kvm@vger.kernel.org>, <linux-s390@vger.kernel.org>, <linux-kbuild@vger.kernel.org>, <mgurtovoy@nvidia.com>, <jgg@nvidia.com>, <yishaih@nvidia.com>, <maorg@nvidia.com>, <leonro@nvidia.com> Subject: [PATCH 12/12] vfio/pci: Introduce vfio_pci_core.ko Date: Wed, 21 Jul 2021 19:16:09 +0300 Message-ID: <20210721161609.68223-13-yishaih@nvidia.com> In-Reply-To: <20210721161609.68223-1-yishaih@nvidia.com> References: <20210721161609.68223-1-yishaih@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk
Series	Introduce vfio_pci_core subsystem \| expand [00/12] Introduce vfio_pci_core subsystem [01/12] vfio/pci: Rename vfio_pci.c to vfio_pci_core.c [02/12] vfio/pci: Rename vfio_pci_private.h to vfio_pci_core.h [03/12] vfio/pci: Rename vfio_pci_device to vfio_pci_core_device [04/12] vfio/pci: Rename ops functions to fit core namings [05/12] vfio/pci: Include vfio header in vfio_pci_core.h [06/12] vfio/pci: Split the pci_driver code out of vfio_pci_core.c [07/12] vfio/pci: Move igd initialization to vfio_pci.c [08/12] vfio/pci: Move module parameters to vfio_pci.c [09/12] PCI: Add a PCI_ID_F_VFIO_DRIVER_OVERRIDE flag to struct pci_device_id [10/12] vfio: Use select for eventfd [11/12] vfio: Use kconfig if XX/endif blocks instead of repeating 'depends on' [12/12] vfio/pci: Introduce vfio_pci_core.ko

diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index afdab7d71e98..18898ae49919 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -1,19 +1,31 @@ # SPDX-License-Identifier: GPL-2.0-only -config VFIO_PCI +config VFIO_PCI_CORE tristate "VFIO support for PCI devices" depends on PCI depends on MMU select VFIO_VIRQFD select IRQ_BYPASS_MANAGER help - Support for the PCI VFIO bus driver. This is required to make - use of PCI drivers using the VFIO framework. + Support for using PCI devices with VFIO. + +if VFIO_PCI_CORE +config VFIO_PCI_MMAP + def_bool y if !S390 + +config VFIO_PCI_INTX + def_bool y if !S390 + +config VFIO_PCI + tristate "Generic VFIO support for any PCI device" + help + Support for the generic PCI VFIO bus driver which can connect any + PCI device to the VFIO framework. If you don't know what to do here, say N. if VFIO_PCI config VFIO_PCI_VGA - bool "VFIO PCI support for VGA devices" + bool "Generic VFIO PCI support for VGA devices" depends on X86 && VGA_ARB help Support for VGA extension to VFIO PCI. This exposes an additional @@ -22,14 +34,8 @@ config VFIO_PCI_VGA If you don't know what to do here, say N. -config VFIO_PCI_MMAP - def_bool y if !S390 - -config VFIO_PCI_INTX - def_bool y if !S390 - config VFIO_PCI_IGD - bool "VFIO PCI extensions for Intel graphics (GVT-d)" + bool "Generic VFIO PCI extensions for Intel graphics (GVT-d)" depends on X86 default y help @@ -39,5 +45,5 @@ config VFIO_PCI_IGD and LPC bridge config space. To enable Intel IGD assignment through vfio-pci, say Y. - +endif endif diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile index 8aa517b4b671..349d68d242b4 100644 --- a/drivers/vfio/pci/Makefile +++ b/drivers/vfio/pci/Makefile @@ -1,7 +1,9 @@ # SPDX-License-Identifier: GPL-2.0-only -vfio-pci-y := vfio_pci.o vfio_pci_core.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o -vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o -vfio-pci-$(CONFIG_S390) += vfio_pci_zdev.o +vfio-pci-core-y := vfio_pci_core.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o +vfio-pci-core-$(CONFIG_S390) += vfio_pci_zdev.o +obj-$(CONFIG_VFIO_PCI_CORE) += vfio-pci-core.o +vfio-pci-y := vfio_pci.o +vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o obj-$(CONFIG_VFIO_PCI) += vfio-pci.o diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 7a43edbe8618..41b4742aef20 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -25,7 +25,7 @@ #include <linux/types.h> #include <linux/uaccess.h> -#include "vfio_pci_core.h" +#include <linux/vfio_pci_core.h> #define DRIVER_VERSION "0.2" #define DRIVER_AUTHOR "Alex Williamson <alex.williamson@redhat.com>" @@ -154,6 +154,7 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) ret = vfio_pci_core_register_device(vdev); if (ret) goto out_free; + dev_set_drvdata(&pdev->dev, vdev); return 0; out_free: @@ -249,14 +250,10 @@ static int __init vfio_pci_init(void) vfio_pci_core_set_params(nointxmask, is_disable_vga, disable_idle_d3); - ret = vfio_pci_core_init(); - if (ret) - return ret; - /* Register and scan for devices */ ret = pci_register_driver(&vfio_pci_driver); if (ret) - goto out; + return ret; vfio_pci_fill_ids(); @@ -264,17 +261,12 @@ static int __init vfio_pci_init(void) pr_warn("device denylist disabled.\n"); return 0; - -out: - vfio_pci_core_cleanup(); - return ret; } module_init(vfio_pci_init); static void __exit vfio_pci_cleanup(void) { pci_unregister_driver(&vfio_pci_driver); - vfio_pci_core_cleanup(); } module_exit(vfio_pci_cleanup); diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c index 1f034f768a27..6e58b4bf7a60 100644 --- a/drivers/vfio/pci/vfio_pci_config.c +++ b/drivers/vfio/pci/vfio_pci_config.c @@ -26,7 +26,7 @@ #include <linux/vfio.h> #include <linux/slab.h> -#include "vfio_pci_core.h" +#include <linux/vfio_pci_core.h> /* Fake capability ID for standard config space */ #define PCI_CAP_ID_BASIC 0 diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index e65b154f17c3..3a5b6d889a69 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -8,6 +8,8 @@ * Author: Tom Lyon, pugs@cisco.com */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/device.h> #include <linux/eventfd.h> #include <linux/file.h> @@ -25,7 +27,11 @@ #include <linux/nospec.h> #include <linux/sched/mm.h> -#include "vfio_pci_core.h" +#include <linux/vfio_pci_core.h> + +#define DRIVER_VERSION "0.2" +#define DRIVER_AUTHOR "Alex Williamson <alex.williamson@redhat.com>" +#define DRIVER_DESC "core driver for VFIO based PCI devices" static bool nointxmask; static bool disable_vga; @@ -306,6 +312,7 @@ int vfio_pci_core_enable(struct vfio_pci_core_device *vdev) return 0; } +EXPORT_SYMBOL_GPL(vfio_pci_core_enable); void vfio_pci_core_disable(struct vfio_pci_core_device *vdev) { @@ -405,6 +412,7 @@ void vfio_pci_core_disable(struct vfio_pci_core_device *vdev) if (!disable_idle_d3) vfio_pci_set_power_state(vdev, PCI_D3hot); } +EXPORT_SYMBOL_GPL(vfio_pci_core_disable); static struct vfio_pci_core_device *get_pf_vdev(struct vfio_pci_core_device *vdev) { @@ -461,6 +469,7 @@ void vfio_pci_core_close_device(struct vfio_device *core_vdev) } mutex_unlock(&vdev->igate); } +EXPORT_SYMBOL_GPL(vfio_pci_core_close_device); void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev) { @@ -468,6 +477,7 @@ void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev) vfio_spapr_pci_eeh_open(vdev->pdev); vfio_pci_vf_token_user_add(vdev, 1); } +EXPORT_SYMBOL_GPL(vfio_pci_core_finish_enable); static int vfio_pci_get_irq_count(struct vfio_pci_core_device *vdev, int irq_type) { @@ -626,6 +636,7 @@ int vfio_pci_register_dev_region(struct vfio_pci_core_device *vdev, return 0; } +EXPORT_SYMBOL_GPL(vfio_pci_register_dev_region); long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd, unsigned long arg) @@ -1170,6 +1181,7 @@ long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd, return -ENOTTY; } +EXPORT_SYMBOL_GPL(vfio_pci_core_ioctl); static ssize_t vfio_pci_rw(struct vfio_pci_core_device *vdev, char __user *buf, size_t count, loff_t *ppos, bool iswrite) @@ -1213,6 +1225,7 @@ ssize_t vfio_pci_core_read(struct vfio_device *core_vdev, char __user *buf, return vfio_pci_rw(vdev, buf, count, ppos, false); } +EXPORT_SYMBOL_GPL(vfio_pci_core_read); ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *buf, size_t count, loff_t *ppos) @@ -1225,6 +1238,7 @@ ssize_t vfio_pci_core_write(struct vfio_device *core_vdev, const char __user *bu return vfio_pci_rw(vdev, (char __user *)buf, count, ppos, true); } +EXPORT_SYMBOL_GPL(vfio_pci_core_write); /* Return 1 on zap and vma_lock acquired, 0 on contention (only with @try) */ static int vfio_pci_zap_and_vma_lock(struct vfio_pci_core_device *vdev, bool try) @@ -1503,6 +1517,7 @@ int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma return 0; } +EXPORT_SYMBOL_GPL(vfio_pci_core_mmap); void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count) { @@ -1525,6 +1540,7 @@ void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count) mutex_unlock(&vdev->igate); } +EXPORT_SYMBOL_GPL(vfio_pci_core_request); static int vfio_pci_validate_vf_token(struct vfio_pci_core_device *vdev, bool vf_token, uuid_t *uuid) @@ -1669,6 +1685,7 @@ int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf) return 1; /* Match */ } +EXPORT_SYMBOL_GPL(vfio_pci_core_match); static int vfio_pci_bus_notifier(struct notifier_block *nb, unsigned long action, void *data) @@ -1776,6 +1793,7 @@ void vfio_pci_core_init_device(struct vfio_pci_core_device *vdev, INIT_LIST_HEAD(&vdev->vma_list); init_rwsem(&vdev->memory_lock); } +EXPORT_SYMBOL_GPL(vfio_pci_core_init_device); void vfio_pci_core_uninit_device(struct vfio_pci_core_device *vdev) { @@ -1786,6 +1804,7 @@ void vfio_pci_core_uninit_device(struct vfio_pci_core_device *vdev) kfree(vdev->region); kfree(vdev->pm_save); } +EXPORT_SYMBOL_GPL(vfio_pci_core_uninit_device); int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev) { @@ -1847,7 +1866,6 @@ int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev) ret = vfio_register_group_dev(&vdev->vdev); if (ret) goto out_power; - dev_set_drvdata(&pdev->dev, vdev); return 0; out_power: @@ -1859,6 +1877,7 @@ int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev) vfio_iommu_group_put(group, &pdev->dev); return ret; } +EXPORT_SYMBOL_GPL(vfio_pci_core_register_device); void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev) { @@ -1876,6 +1895,7 @@ void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev) if (!disable_idle_d3) vfio_pci_set_power_state(vdev, PCI_D0); } +EXPORT_SYMBOL_GPL(vfio_pci_core_unregister_device); static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev, pci_channel_state_t state) @@ -1921,10 +1941,12 @@ int vfio_pci_core_sriov_configure(struct pci_dev *pdev, int nr_virtfn) return ret < 0 ? ret : nr_virtfn; } +EXPORT_SYMBOL_GPL(vfio_pci_core_sriov_configure); const struct pci_error_handlers vfio_pci_core_err_handlers = { .error_detected = vfio_pci_aer_err_detected, }; +EXPORT_SYMBOL_GPL(vfio_pci_core_err_handlers); static int vfio_pci_check_all_devices_bound(struct pci_dev *pdev, void *data) { @@ -2094,16 +2116,23 @@ void vfio_pci_core_set_params(bool is_nointxmask, bool is_disable_vga, disable_vga = is_disable_vga; disable_idle_d3 = is_disable_idle_d3; } +EXPORT_SYMBOL_GPL(vfio_pci_core_set_params); -/* This will become the __exit function of vfio_pci_core.ko */ -void vfio_pci_core_cleanup(void) +static void vfio_pci_core_cleanup(void) { vfio_pci_uninit_perm_bits(); } -/* This will become the __init function of vfio_pci_core.ko */ -int __init vfio_pci_core_init(void) +static int __init vfio_pci_core_init(void) { /* Allocate shared config space permission data used by all devices */ return vfio_pci_init_perm_bits(); } + +module_init(vfio_pci_core_init); +module_exit(vfio_pci_core_cleanup); + +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); diff --git a/drivers/vfio/pci/vfio_pci_igd.c b/drivers/vfio/pci/vfio_pci_igd.c index a324ca7e6b5a..7ca4109bba48 100644 --- a/drivers/vfio/pci/vfio_pci_igd.c +++ b/drivers/vfio/pci/vfio_pci_igd.c @@ -15,7 +15,7 @@ #include <linux/uaccess.h> #include <linux/vfio.h> -#include "vfio_pci_core.h" +#include <linux/vfio_pci_core.h> #define OPREGION_SIGNATURE "IntelGraphicsMem" #define OPREGION_SIZE (8 * 1024) diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index 945ddbdf4d11..6069a11fb51a 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -20,7 +20,7 @@ #include <linux/wait.h> #include <linux/slab.h> -#include "vfio_pci_core.h" +#include <linux/vfio_pci_core.h> /* * INTx diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_rdwr.c index 8fff4689dd44..57d3b2cbbd8e 100644 --- a/drivers/vfio/pci/vfio_pci_rdwr.c +++ b/drivers/vfio/pci/vfio_pci_rdwr.c @@ -17,7 +17,7 @@ #include <linux/vfio.h> #include <linux/vgaarb.h> -#include "vfio_pci_core.h" +#include <linux/vfio_pci_core.h> #ifdef __LITTLE_ENDIAN #define vfio_ioread64 ioread64 diff --git a/drivers/vfio/pci/vfio_pci_zdev.c b/drivers/vfio/pci/vfio_pci_zdev.c index 2ffbdc11f089..fe4def9ffffb 100644 --- a/drivers/vfio/pci/vfio_pci_zdev.c +++ b/drivers/vfio/pci/vfio_pci_zdev.c @@ -19,7 +19,7 @@ #include <asm/pci_clp.h> #include <asm/pci_io.h> -#include "vfio_pci_core.h" +#include <linux/vfio_pci_core.h> /* * Add the Base PCI Function information to the device info region. diff --git a/drivers/vfio/pci/vfio_pci_core.h b/include/linux/vfio_pci_core.h similarity index 99% rename from drivers/vfio/pci/vfio_pci_core.h rename to include/linux/vfio_pci_core.h index 7a2da1e14de3..ef9a44b6cf5d 100644 --- a/drivers/vfio/pci/vfio_pci_core.h +++ b/include/linux/vfio_pci_core.h @@ -207,8 +207,6 @@ static inline int vfio_pci_info_zdev_add_caps(struct vfio_pci_core_device *vdev, #endif /* Will be exported for vfio pci drivers usage */ -void vfio_pci_core_cleanup(void); -int vfio_pci_core_init(void); void vfio_pci_core_set_params(bool nointxmask, bool is_disable_vga, bool is_disable_idle_d3); void vfio_pci_core_close_device(struct vfio_device *core_vdev);

[12/12] vfio/pci: Introduce vfio_pci_core.ko

Commit Message

Comments

Patch