| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Gerd Hoffmann | 2573 | 79.00% | 21 | 31.82% |
| Thomas Zimmermann | 328 | 10.07% | 11 | 16.67% |
| Peter Wu | 95 | 2.92% | 2 | 3.03% |
| Takashi Iwai | 78 | 2.39% | 1 | 1.52% |
| Daniel Vetter | 24 | 0.74% | 7 | 10.61% |
| Nirmoy Das | 22 | 0.68% | 1 | 1.52% |
| Max Staudt | 19 | 0.58% | 1 | 1.52% |
| Jani Nikula | 18 | 0.55% | 1 | 1.52% |
| Doug Anderson | 17 | 0.52% | 1 | 1.52% |
| Christophe Jaillet | 13 | 0.40% | 1 | 1.52% |
| H. Peter Anvin | 10 | 0.31% | 1 | 1.52% |
| Sam Ravnborg | 9 | 0.28% | 1 | 1.52% |
| Sam Bobroff | 7 | 0.21% | 1 | 1.52% |
| Benoit Taine | 6 | 0.18% | 1 | 1.52% |
| Jeff Johnson | 5 | 0.15% | 1 | 1.52% |
| Russell King | 5 | 0.15% | 1 | 1.52% |
| Ville Syrjälä | 4 | 0.12% | 1 | 1.52% |
| Chuhong Yuan | 4 | 0.12% | 1 | 1.52% |
| Alistair Francis | 4 | 0.12% | 1 | 1.52% |
| Chris Ruffin | 3 | 0.09% | 1 | 1.52% |
| Michel Dänzer | 3 | 0.09% | 1 | 1.52% |
| Gabriel Krisman Bertazi | 3 | 0.09% | 2 | 3.03% |
| Robin H. Johnson | 2 | 0.06% | 1 | 1.52% |
| Baoyou Xie | 1 | 0.03% | 1 | 1.52% |
| Michał Mirosław | 1 | 0.03% | 1 | 1.52% |
| Thomas Gleixner | 1 | 0.03% | 1 | 1.52% |
| Matt Roper | 1 | 0.03% | 1 | 1.52% |
| Yang Yingliang | 1 | 0.03% | 1 | 1.52% |
| Total | 3257 | 66 |
// SPDX-License-Identifier: GPL-2.0-or-later #include <linux/module.h> #include <linux/pci.h> #include <drm/drm_aperture.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_drv.h> #include <drm/drm_edid.h> #include <drm/drm_fbdev_ttm.h> #include <drm/drm_fourcc.h> #include <drm/drm_framebuffer.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_gem_vram_helper.h> #include <drm/drm_managed.h> #include <drm/drm_module.h> #include <drm/drm_probe_helper.h> #include <drm/drm_simple_kms_helper.h> #include <video/vga.h> /* ---------------------------------------------------------------------- */ #define VBE_DISPI_IOPORT_INDEX 0x01CE #define VBE_DISPI_IOPORT_DATA 0x01CF #define VBE_DISPI_INDEX_ID 0x0 #define VBE_DISPI_INDEX_XRES 0x1 #define VBE_DISPI_INDEX_YRES 0x2 #define VBE_DISPI_INDEX_BPP 0x3 #define VBE_DISPI_INDEX_ENABLE 0x4 #define VBE_DISPI_INDEX_BANK 0x5 #define VBE_DISPI_INDEX_VIRT_WIDTH 0x6 #define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7 #define VBE_DISPI_INDEX_X_OFFSET 0x8 #define VBE_DISPI_INDEX_Y_OFFSET 0x9 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa #define VBE_DISPI_ID0 0xB0C0 #define VBE_DISPI_ID1 0xB0C1 #define VBE_DISPI_ID2 0xB0C2 #define VBE_DISPI_ID3 0xB0C3 #define VBE_DISPI_ID4 0xB0C4 #define VBE_DISPI_ID5 0xB0C5 #define VBE_DISPI_DISABLED 0x00 #define VBE_DISPI_ENABLED 0x01 #define VBE_DISPI_GETCAPS 0x02 #define VBE_DISPI_8BIT_DAC 0x20 #define VBE_DISPI_LFB_ENABLED 0x40 #define VBE_DISPI_NOCLEARMEM 0x80 static int bochs_modeset = -1; static int defx = 1024; static int defy = 768; module_param_named(modeset, bochs_modeset, int, 0444); MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting"); module_param(defx, int, 0444); module_param(defy, int, 0444); MODULE_PARM_DESC(defx, "default x resolution"); MODULE_PARM_DESC(defy, "default y resolution"); /* ---------------------------------------------------------------------- */ enum bochs_types { BOCHS_QEMU_STDVGA, BOCHS_SIMICS, BOCHS_UNKNOWN, }; struct bochs_device { /* hw */ void __iomem *mmio; int ioports; void __iomem *fb_map; unsigned long fb_base; unsigned long fb_size; unsigned long qext_size; /* mode */ u16 xres; u16 yres; u16 yres_virtual; u32 stride; u32 bpp; const struct drm_edid *drm_edid; /* drm */ struct drm_device *dev; struct drm_simple_display_pipe pipe; struct drm_connector connector; }; /* ---------------------------------------------------------------------- */ static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val) { if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df)) return; if (bochs->mmio) { int offset = ioport - 0x3c0 + 0x400; writeb(val, bochs->mmio + offset); } else { outb(val, ioport); } } static u8 bochs_vga_readb(struct bochs_device *bochs, u16 ioport) { if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df)) return 0xff; if (bochs->mmio) { int offset = ioport - 0x3c0 + 0x400; return readb(bochs->mmio + offset); } else { return inb(ioport); } } static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg) { u16 ret = 0; if (bochs->mmio) { int offset = 0x500 + (reg << 1); ret = readw(bochs->mmio + offset); } else { outw(reg, VBE_DISPI_IOPORT_INDEX); ret = inw(VBE_DISPI_IOPORT_DATA); } return ret; } static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val) { if (bochs->mmio) { int offset = 0x500 + (reg << 1); writew(val, bochs->mmio + offset); } else { outw(reg, VBE_DISPI_IOPORT_INDEX); outw(val, VBE_DISPI_IOPORT_DATA); } } static void bochs_hw_set_big_endian(struct bochs_device *bochs) { if (bochs->qext_size < 8) return; writel(0xbebebebe, bochs->mmio + 0x604); } static void bochs_hw_set_little_endian(struct bochs_device *bochs) { if (bochs->qext_size < 8) return; writel(0x1e1e1e1e, bochs->mmio + 0x604); } #ifdef __BIG_ENDIAN #define bochs_hw_set_native_endian(_b) bochs_hw_set_big_endian(_b) #else #define bochs_hw_set_native_endian(_b) bochs_hw_set_little_endian(_b) #endif static int bochs_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) { struct bochs_device *bochs = data; size_t i, start = block * EDID_LENGTH; if (start + len > 0x400 /* vga register offset */) return -1; for (i = 0; i < len; i++) buf[i] = readb(bochs->mmio + start + i); return 0; } static int bochs_hw_load_edid(struct bochs_device *bochs) { u8 header[8]; if (!bochs->mmio) return -1; /* check header to detect whenever edid support is enabled in qemu */ bochs_get_edid_block(bochs, header, 0, ARRAY_SIZE(header)); if (drm_edid_header_is_valid(header) != 8) return -1; drm_edid_free(bochs->drm_edid); bochs->drm_edid = drm_edid_read_custom(&bochs->connector, bochs_get_edid_block, bochs); if (!bochs->drm_edid) return -1; return 0; } static int bochs_hw_init(struct drm_device *dev) { struct bochs_device *bochs = dev->dev_private; struct pci_dev *pdev = to_pci_dev(dev->dev); unsigned long addr, size, mem, ioaddr, iosize; u16 id; if (pdev->resource[2].flags & IORESOURCE_MEM) { /* mmio bar with vga and bochs registers present */ if (pci_request_region(pdev, 2, "bochs-drm") != 0) { DRM_ERROR("Cannot request mmio region\n"); return -EBUSY; } ioaddr = pci_resource_start(pdev, 2); iosize = pci_resource_len(pdev, 2); bochs->mmio = ioremap(ioaddr, iosize); if (bochs->mmio == NULL) { DRM_ERROR("Cannot map mmio region\n"); return -ENOMEM; } } else { ioaddr = VBE_DISPI_IOPORT_INDEX; iosize = 2; if (!request_region(ioaddr, iosize, "bochs-drm")) { DRM_ERROR("Cannot request ioports\n"); return -EBUSY; } bochs->ioports = 1; } id = bochs_dispi_read(bochs, VBE_DISPI_INDEX_ID); mem = bochs_dispi_read(bochs, VBE_DISPI_INDEX_VIDEO_MEMORY_64K) * 64 * 1024; if ((id & 0xfff0) != VBE_DISPI_ID0) { DRM_ERROR("ID mismatch\n"); return -ENODEV; } if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0) return -ENODEV; addr = pci_resource_start(pdev, 0); size = pci_resource_len(pdev, 0); if (addr == 0) return -ENODEV; if (size != mem) { DRM_ERROR("Size mismatch: pci=%ld, bochs=%ld\n", size, mem); size = min(size, mem); } if (pci_request_region(pdev, 0, "bochs-drm") != 0) DRM_WARN("Cannot request framebuffer, boot fb still active?\n"); bochs->fb_map = ioremap(addr, size); if (bochs->fb_map == NULL) { DRM_ERROR("Cannot map framebuffer\n"); return -ENOMEM; } bochs->fb_base = addr; bochs->fb_size = size; DRM_INFO("Found bochs VGA, ID 0x%x.\n", id); DRM_INFO("Framebuffer size %ld kB @ 0x%lx, %s @ 0x%lx.\n", size / 1024, addr, bochs->ioports ? "ioports" : "mmio", ioaddr); if (bochs->mmio && pdev->revision >= 2) { bochs->qext_size = readl(bochs->mmio + 0x600); if (bochs->qext_size < 4 || bochs->qext_size > iosize) { bochs->qext_size = 0; goto noext; } DRM_DEBUG("Found qemu ext regs, size %ld\n", bochs->qext_size); bochs_hw_set_native_endian(bochs); } noext: return 0; } static void bochs_hw_fini(struct drm_device *dev) { struct bochs_device *bochs = dev->dev_private; /* TODO: shot down existing vram mappings */ if (bochs->mmio) iounmap(bochs->mmio); if (bochs->ioports) release_region(VBE_DISPI_IOPORT_INDEX, 2); if (bochs->fb_map) iounmap(bochs->fb_map); pci_release_regions(to_pci_dev(dev->dev)); drm_edid_free(bochs->drm_edid); } static void bochs_hw_blank(struct bochs_device *bochs, bool blank) { DRM_DEBUG_DRIVER("hw_blank %d\n", blank); /* enable color bit (so VGA_IS1_RC access works) */ bochs_vga_writeb(bochs, VGA_MIS_W, VGA_MIS_COLOR); /* discard ar_flip_flop */ (void)bochs_vga_readb(bochs, VGA_IS1_RC); /* blank or unblank; we need only update index and set 0x20 */ bochs_vga_writeb(bochs, VGA_ATT_W, blank ? 0 : 0x20); } static void bochs_hw_setmode(struct bochs_device *bochs, struct drm_display_mode *mode) { int idx; if (!drm_dev_enter(bochs->dev, &idx)) return; bochs->xres = mode->hdisplay; bochs->yres = mode->vdisplay; bochs->bpp = 32; bochs->stride = mode->hdisplay * (bochs->bpp / 8); bochs->yres_virtual = bochs->fb_size / bochs->stride; DRM_DEBUG_DRIVER("%dx%d @ %d bpp, vy %d\n", bochs->xres, bochs->yres, bochs->bpp, bochs->yres_virtual); bochs_hw_blank(bochs, false); bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE, 0); bochs_dispi_write(bochs, VBE_DISPI_INDEX_BPP, bochs->bpp); bochs_dispi_write(bochs, VBE_DISPI_INDEX_XRES, bochs->xres); bochs_dispi_write(bochs, VBE_DISPI_INDEX_YRES, bochs->yres); bochs_dispi_write(bochs, VBE_DISPI_INDEX_BANK, 0); bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, bochs->xres); bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_HEIGHT, bochs->yres_virtual); bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, 0); bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, 0); bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED); drm_dev_exit(idx); } static void bochs_hw_setformat(struct bochs_device *bochs, const struct drm_format_info *format) { int idx; if (!drm_dev_enter(bochs->dev, &idx)) return; DRM_DEBUG_DRIVER("format %c%c%c%c\n", (format->format >> 0) & 0xff, (format->format >> 8) & 0xff, (format->format >> 16) & 0xff, (format->format >> 24) & 0xff); switch (format->format) { case DRM_FORMAT_XRGB8888: bochs_hw_set_little_endian(bochs); break; case DRM_FORMAT_BGRX8888: bochs_hw_set_big_endian(bochs); break; default: /* should not happen */ DRM_ERROR("%s: Huh? Got framebuffer format 0x%x", __func__, format->format); break; } drm_dev_exit(idx); } static void bochs_hw_setbase(struct bochs_device *bochs, int x, int y, int stride, u64 addr) { unsigned long offset; unsigned int vx, vy, vwidth, idx; if (!drm_dev_enter(bochs->dev, &idx)) return; bochs->stride = stride; offset = (unsigned long)addr + y * bochs->stride + x * (bochs->bpp / 8); vy = offset / bochs->stride; vx = (offset % bochs->stride) * 8 / bochs->bpp; vwidth = stride * 8 / bochs->bpp; DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n", x, y, addr, offset, vx, vy); bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth); bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx); bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy); drm_dev_exit(idx); } /* ---------------------------------------------------------------------- */ static const uint32_t bochs_formats[] = { DRM_FORMAT_XRGB8888, DRM_FORMAT_BGRX8888, }; static void bochs_plane_update(struct bochs_device *bochs, struct drm_plane_state *state) { struct drm_gem_vram_object *gbo; s64 gpu_addr; if (!state->fb || !bochs->stride) return; gbo = drm_gem_vram_of_gem(state->fb->obj[0]); gpu_addr = drm_gem_vram_offset(gbo); if (WARN_ON_ONCE(gpu_addr < 0)) return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */ bochs_hw_setbase(bochs, state->crtc_x, state->crtc_y, state->fb->pitches[0], state->fb->offsets[0] + gpu_addr); bochs_hw_setformat(bochs, state->fb->format); } static void bochs_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_crtc_state *crtc_state, struct drm_plane_state *plane_state) { struct bochs_device *bochs = pipe->crtc.dev->dev_private; bochs_hw_setmode(bochs, &crtc_state->mode); bochs_plane_update(bochs, plane_state); } static void bochs_pipe_disable(struct drm_simple_display_pipe *pipe) { struct bochs_device *bochs = pipe->crtc.dev->dev_private; bochs_hw_blank(bochs, true); } static void bochs_pipe_update(struct drm_simple_display_pipe *pipe, struct drm_plane_state *old_state) { struct bochs_device *bochs = pipe->crtc.dev->dev_private; bochs_plane_update(bochs, pipe->plane.state); } static const struct drm_simple_display_pipe_funcs bochs_pipe_funcs = { .enable = bochs_pipe_enable, .disable = bochs_pipe_disable, .update = bochs_pipe_update, .prepare_fb = drm_gem_vram_simple_display_pipe_prepare_fb, .cleanup_fb = drm_gem_vram_simple_display_pipe_cleanup_fb, }; static int bochs_connector_get_modes(struct drm_connector *connector) { int count; count = drm_edid_connector_add_modes(connector); if (!count) { count = drm_add_modes_noedid(connector, 8192, 8192); drm_set_preferred_mode(connector, defx, defy); } return count; } static const struct drm_connector_helper_funcs bochs_connector_connector_helper_funcs = { .get_modes = bochs_connector_get_modes, }; static const struct drm_connector_funcs bochs_connector_connector_funcs = { .fill_modes = drm_helper_probe_single_connector_modes, .destroy = drm_connector_cleanup, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static void bochs_connector_init(struct drm_device *dev) { struct bochs_device *bochs = dev->dev_private; struct drm_connector *connector = &bochs->connector; drm_connector_init(dev, connector, &bochs_connector_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); drm_connector_helper_add(connector, &bochs_connector_connector_helper_funcs); bochs_hw_load_edid(bochs); if (bochs->drm_edid) { DRM_INFO("Found EDID data blob.\n"); drm_connector_attach_edid_property(connector); drm_edid_connector_update(&bochs->connector, bochs->drm_edid); } } static struct drm_framebuffer * bochs_gem_fb_create(struct drm_device *dev, struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) { if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888 && mode_cmd->pixel_format != DRM_FORMAT_BGRX8888) return ERR_PTR(-EINVAL); return drm_gem_fb_create(dev, file, mode_cmd); } static const struct drm_mode_config_funcs bochs_mode_funcs = { .fb_create = bochs_gem_fb_create, .mode_valid = drm_vram_helper_mode_valid, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, }; static int bochs_kms_init(struct bochs_device *bochs) { int ret; ret = drmm_mode_config_init(bochs->dev); if (ret) return ret; bochs->dev->mode_config.max_width = 8192; bochs->dev->mode_config.max_height = 8192; bochs->dev->mode_config.preferred_depth = 24; bochs->dev->mode_config.prefer_shadow = 0; bochs->dev->mode_config.quirk_addfb_prefer_host_byte_order = true; bochs->dev->mode_config.funcs = &bochs_mode_funcs; bochs_connector_init(bochs->dev); drm_simple_display_pipe_init(bochs->dev, &bochs->pipe, &bochs_pipe_funcs, bochs_formats, ARRAY_SIZE(bochs_formats), NULL, &bochs->connector); drm_mode_config_reset(bochs->dev); return 0; } /* ---------------------------------------------------------------------- */ /* drm interface */ static int bochs_load(struct drm_device *dev) { struct bochs_device *bochs; int ret; bochs = drmm_kzalloc(dev, sizeof(*bochs), GFP_KERNEL); if (bochs == NULL) return -ENOMEM; dev->dev_private = bochs; bochs->dev = dev; ret = bochs_hw_init(dev); if (ret) return ret; ret = drmm_vram_helper_init(dev, bochs->fb_base, bochs->fb_size); if (ret) goto err_hw_fini; ret = bochs_kms_init(bochs); if (ret) goto err_hw_fini; return 0; err_hw_fini: bochs_hw_fini(dev); return ret; } DEFINE_DRM_GEM_FOPS(bochs_fops); static const struct drm_driver bochs_driver = { .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, .fops = &bochs_fops, .name = "bochs-drm", .desc = "bochs dispi vga interface (qemu stdvga)", .date = "20130925", .major = 1, .minor = 0, DRM_GEM_VRAM_DRIVER, }; /* ---------------------------------------------------------------------- */ /* pm interface */ #ifdef CONFIG_PM_SLEEP static int bochs_pm_suspend(struct device *dev) { struct drm_device *drm_dev = dev_get_drvdata(dev); return drm_mode_config_helper_suspend(drm_dev); } static int bochs_pm_resume(struct device *dev) { struct drm_device *drm_dev = dev_get_drvdata(dev); return drm_mode_config_helper_resume(drm_dev); } #endif static const struct dev_pm_ops bochs_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend, bochs_pm_resume) }; /* ---------------------------------------------------------------------- */ /* pci interface */ static int bochs_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct drm_device *dev; unsigned long fbsize; int ret; fbsize = pci_resource_len(pdev, 0); if (fbsize < 4 * 1024 * 1024) { DRM_ERROR("less than 4 MB video memory, ignoring device\n"); return -ENOMEM; } ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &bochs_driver); if (ret) return ret; dev = drm_dev_alloc(&bochs_driver, &pdev->dev); if (IS_ERR(dev)) return PTR_ERR(dev); ret = pcim_enable_device(pdev); if (ret) goto err_free_dev; pci_set_drvdata(pdev, dev); ret = bochs_load(dev); if (ret) goto err_free_dev; ret = drm_dev_register(dev, 0); if (ret) goto err_hw_fini; drm_fbdev_ttm_setup(dev, 32); return ret; err_hw_fini: bochs_hw_fini(dev); err_free_dev: drm_dev_put(dev); return ret; } static void bochs_pci_remove(struct pci_dev *pdev) { struct drm_device *dev = pci_get_drvdata(pdev); drm_dev_unplug(dev); drm_atomic_helper_shutdown(dev); bochs_hw_fini(dev); drm_dev_put(dev); } static void bochs_pci_shutdown(struct pci_dev *pdev) { drm_atomic_helper_shutdown(pci_get_drvdata(pdev)); } static const struct pci_device_id bochs_pci_tbl[] = { { .vendor = 0x1234, .device = 0x1111, .subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET, .subdevice = PCI_SUBDEVICE_ID_QEMU, .driver_data = BOCHS_QEMU_STDVGA, }, { .vendor = 0x1234, .device = 0x1111, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .driver_data = BOCHS_UNKNOWN, }, { .vendor = 0x4321, .device = 0x1111, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .driver_data = BOCHS_SIMICS, }, { /* end of list */ } }; static struct pci_driver bochs_pci_driver = { .name = "bochs-drm", .id_table = bochs_pci_tbl, .probe = bochs_pci_probe, .remove = bochs_pci_remove, .shutdown = bochs_pci_shutdown, .driver.pm = &bochs_pm_ops, }; /* ---------------------------------------------------------------------- */ /* module init/exit */ drm_module_pci_driver_if_modeset(bochs_pci_driver, bochs_modeset); MODULE_DEVICE_TABLE(pci, bochs_pci_tbl); MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>"); MODULE_DESCRIPTION("DRM Support for bochs dispi vga interface (qemu stdvga)"); MODULE_LICENSE("GPL");
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