// SPDX-License-Identifier: GPL-2.0 /* * Mediated virtual PCI display host device driver * * Emulate enough of qemu stdvga to make bochs-drm.ko happy. That is * basically the vram memory bar and the bochs dispi interface vbe * registers in the mmio register bar. Specifically it does *not* * include any legacy vga stuff. Device looks a lot like "qemu -device * secondary-vga". * * (c) Gerd Hoffmann <[email protected]> * * based on mtty driver which is: * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. * Author: Neo Jia <[email protected]> * Kirti Wankhede <[email protected]> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/cdev.h> #include <linux/vfio.h> #include <linux/iommu.h> #include <linux/sysfs.h> #include <linux/mdev.h> #include <linux/pci.h> #include <linux/dma-buf.h> #include <linux/highmem.h> #include <drm/drm_fourcc.h> #include <drm/drm_rect.h> #include <drm/drm_modeset_lock.h> #include <drm/drm_property.h> #include <drm/drm_plane.h> #define VBE_DISPI_INDEX_ID … #define VBE_DISPI_INDEX_XRES … #define VBE_DISPI_INDEX_YRES … #define VBE_DISPI_INDEX_BPP … #define VBE_DISPI_INDEX_ENABLE … #define VBE_DISPI_INDEX_BANK … #define VBE_DISPI_INDEX_VIRT_WIDTH … #define VBE_DISPI_INDEX_VIRT_HEIGHT … #define VBE_DISPI_INDEX_X_OFFSET … #define VBE_DISPI_INDEX_Y_OFFSET … #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K … #define VBE_DISPI_INDEX_COUNT … #define VBE_DISPI_ID0 … #define VBE_DISPI_ID1 … #define VBE_DISPI_ID2 … #define VBE_DISPI_ID3 … #define VBE_DISPI_ID4 … #define VBE_DISPI_ID5 … #define VBE_DISPI_DISABLED … #define VBE_DISPI_ENABLED … #define VBE_DISPI_GETCAPS … #define VBE_DISPI_8BIT_DAC … #define VBE_DISPI_LFB_ENABLED … #define VBE_DISPI_NOCLEARMEM … #define MBOCHS_NAME … #define MBOCHS_CLASS_NAME … #define MBOCHS_EDID_REGION_INDEX … #define MBOCHS_NUM_REGIONS … #define MBOCHS_CONFIG_SPACE_SIZE … #define MBOCHS_MMIO_BAR_OFFSET … #define MBOCHS_MMIO_BAR_SIZE … #define MBOCHS_EDID_OFFSET … #define MBOCHS_EDID_SIZE … #define MBOCHS_MEMORY_BAR_OFFSET … #define MBOCHS_EDID_BLOB_OFFSET … #define STORE_LE16(addr, val) … #define STORE_LE32(addr, val) … MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; static int max_mbytes = …; module_param_named(count, max_mbytes, int, 0444); MODULE_PARM_DESC(…) …; #define MBOCHS_TYPE_1 … #define MBOCHS_TYPE_2 … #define MBOCHS_TYPE_3 … static struct mbochs_type { … } mbochs_types[] = …; static struct mdev_type *mbochs_mdev_types[] = …; static dev_t mbochs_devt; static const struct class mbochs_class = …; static struct cdev mbochs_cdev; static struct device mbochs_dev; static struct mdev_parent mbochs_parent; static atomic_t mbochs_avail_mbytes; static const struct vfio_device_ops mbochs_dev_ops; struct vfio_region_info_ext { … }; struct mbochs_mode { … }; struct mbochs_dmabuf { … }; /* State of each mdev device */ struct mdev_state { … }; static const char *vbe_name_list[VBE_DISPI_INDEX_COUNT] = …; static const char *vbe_name(u32 index) { … } static struct page *__mbochs_get_page(struct mdev_state *mdev_state, pgoff_t pgoff); static struct page *mbochs_get_page(struct mdev_state *mdev_state, pgoff_t pgoff); static void mbochs_create_config_space(struct mdev_state *mdev_state) { … } static int mbochs_check_framebuffer(struct mdev_state *mdev_state, struct mbochs_mode *mode) { … } static bool mbochs_modes_equal(struct mbochs_mode *mode1, struct mbochs_mode *mode2) { … } static void handle_pci_cfg_write(struct mdev_state *mdev_state, u16 offset, char *buf, u32 count) { … } static void handle_mmio_write(struct mdev_state *mdev_state, u16 offset, char *buf, u32 count) { … } static void handle_mmio_read(struct mdev_state *mdev_state, u16 offset, char *buf, u32 count) { … } static void handle_edid_regs(struct mdev_state *mdev_state, u16 offset, char *buf, u32 count, bool is_write) { … } static void handle_edid_blob(struct mdev_state *mdev_state, u16 offset, char *buf, u32 count, bool is_write) { … } static ssize_t mdev_access(struct mdev_state *mdev_state, char *buf, size_t count, loff_t pos, bool is_write) { … } static int mbochs_reset(struct mdev_state *mdev_state) { … } static int mbochs_init_dev(struct vfio_device *vdev) { … } static int mbochs_probe(struct mdev_device *mdev) { … } static void mbochs_release_dev(struct vfio_device *vdev) { … } static void mbochs_remove(struct mdev_device *mdev) { … } static ssize_t mbochs_read(struct vfio_device *vdev, char __user *buf, size_t count, loff_t *ppos) { … } static ssize_t mbochs_write(struct vfio_device *vdev, const char __user *buf, size_t count, loff_t *ppos) { … } static struct page *__mbochs_get_page(struct mdev_state *mdev_state, pgoff_t pgoff) { … } static struct page *mbochs_get_page(struct mdev_state *mdev_state, pgoff_t pgoff) { … } static void mbochs_put_pages(struct mdev_state *mdev_state) { … } static vm_fault_t mbochs_region_vm_fault(struct vm_fault *vmf) { … } static const struct vm_operations_struct mbochs_region_vm_ops = …; static int mbochs_mmap(struct vfio_device *vdev, struct vm_area_struct *vma) { … } static vm_fault_t mbochs_dmabuf_vm_fault(struct vm_fault *vmf) { … } static const struct vm_operations_struct mbochs_dmabuf_vm_ops = …; static int mbochs_mmap_dmabuf(struct dma_buf *buf, struct vm_area_struct *vma) { … } static void mbochs_print_dmabuf(struct mbochs_dmabuf *dmabuf, const char *prefix) { … } static struct sg_table *mbochs_map_dmabuf(struct dma_buf_attachment *at, enum dma_data_direction direction) { … } static void mbochs_unmap_dmabuf(struct dma_buf_attachment *at, struct sg_table *sg, enum dma_data_direction direction) { … } static void mbochs_release_dmabuf(struct dma_buf *buf) { … } static struct dma_buf_ops mbochs_dmabuf_ops = …; static struct mbochs_dmabuf *mbochs_dmabuf_alloc(struct mdev_state *mdev_state, struct mbochs_mode *mode) { … } static struct mbochs_dmabuf * mbochs_dmabuf_find_by_mode(struct mdev_state *mdev_state, struct mbochs_mode *mode) { … } static struct mbochs_dmabuf * mbochs_dmabuf_find_by_id(struct mdev_state *mdev_state, u32 id) { … } static int mbochs_dmabuf_export(struct mbochs_dmabuf *dmabuf) { … } static int mbochs_get_region_info(struct mdev_state *mdev_state, struct vfio_region_info_ext *ext) { … } static int mbochs_get_irq_info(struct vfio_irq_info *irq_info) { … } static int mbochs_get_device_info(struct vfio_device_info *dev_info) { … } static int mbochs_query_gfx_plane(struct mdev_state *mdev_state, struct vfio_device_gfx_plane_info *plane) { … } static int mbochs_get_gfx_dmabuf(struct mdev_state *mdev_state, u32 id) { … } static long mbochs_ioctl(struct vfio_device *vdev, unsigned int cmd, unsigned long arg) { … } static void mbochs_close_device(struct vfio_device *vdev) { … } static ssize_t memory_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(memory); static struct attribute *mdev_dev_attrs[] = …; static const struct attribute_group mdev_dev_group = …; static const struct attribute_group *mdev_dev_groups[] = …; static ssize_t mbochs_show_description(struct mdev_type *mtype, char *buf) { … } static unsigned int mbochs_get_available(struct mdev_type *mtype) { … } static const struct vfio_device_ops mbochs_dev_ops = …; static struct mdev_driver mbochs_driver = …; static const struct file_operations vd_fops = …; static void mbochs_device_release(struct device *dev) { … } static int __init mbochs_dev_init(void) { … } static void __exit mbochs_dev_exit(void) { … } MODULE_IMPORT_NS(…); module_init(…) … module_exit(…)
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