diff options
Diffstat (limited to 'drivers/gpu/drm/vboxvideo/vbox_main.c')
| -rw-r--r-- | drivers/gpu/drm/vboxvideo/vbox_main.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vboxvideo/vbox_main.c b/drivers/gpu/drm/vboxvideo/vbox_main.c new file mode 100644 index 000000000..c5ea880d1 --- /dev/null +++ b/drivers/gpu/drm/vboxvideo/vbox_main.c @@ -0,0 +1,170 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright (C) 2013-2017 Oracle Corporation + * This file is based on ast_main.c + * Copyright 2012 Red Hat Inc. + * Authors: Dave Airlie <airlied@redhat.com>, + * Michael Thayer <michael.thayer@oracle.com, + * Hans de Goede <hdegoede@redhat.com> + */ + +#include <linux/vbox_err.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_damage_helper.h> + +#include "vbox_drv.h" +#include "vboxvideo_guest.h" +#include "vboxvideo_vbe.h" + +void vbox_report_caps(struct vbox_private *vbox) +{ + u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION | + VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY; + + /* The host only accepts VIDEO_MODE_HINTS if it is send separately. */ + hgsmi_send_caps_info(vbox->guest_pool, caps); + caps |= VBVACAPS_VIDEO_MODE_HINTS; + hgsmi_send_caps_info(vbox->guest_pool, caps); +} + +static int vbox_accel_init(struct vbox_private *vbox) +{ + struct vbva_buffer *vbva; + unsigned int i; + + vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs, + sizeof(*vbox->vbva_info), GFP_KERNEL); + if (!vbox->vbva_info) + return -ENOMEM; + + /* Take a command buffer for each screen from the end of usable VRAM. */ + vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE; + + vbox->vbva_buffers = pci_iomap_range(vbox->ddev.pdev, 0, + vbox->available_vram_size, + vbox->num_crtcs * + VBVA_MIN_BUFFER_SIZE); + if (!vbox->vbva_buffers) + return -ENOMEM; + + for (i = 0; i < vbox->num_crtcs; ++i) { + vbva_setup_buffer_context(&vbox->vbva_info[i], + vbox->available_vram_size + + i * VBVA_MIN_BUFFER_SIZE, + VBVA_MIN_BUFFER_SIZE); + vbva = (void __force *)vbox->vbva_buffers + + i * VBVA_MIN_BUFFER_SIZE; + if (!vbva_enable(&vbox->vbva_info[i], + vbox->guest_pool, vbva, i)) { + /* very old host or driver error. */ + DRM_ERROR("vboxvideo: vbva_enable failed\n"); + } + } + + return 0; +} + +static void vbox_accel_fini(struct vbox_private *vbox) +{ + unsigned int i; + + for (i = 0; i < vbox->num_crtcs; ++i) + vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i); +} + +/* Do we support the 4.3 plus mode hint reporting interface? */ +static bool have_hgsmi_mode_hints(struct vbox_private *vbox) +{ + u32 have_hints, have_cursor; + int ret; + + ret = hgsmi_query_conf(vbox->guest_pool, + VBOX_VBVA_CONF32_MODE_HINT_REPORTING, + &have_hints); + if (ret) + return false; + + ret = hgsmi_query_conf(vbox->guest_pool, + VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING, + &have_cursor); + if (ret) + return false; + + return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS; +} + +bool vbox_check_supported(u16 id) +{ + u16 dispi_id; + + vbox_write_ioport(VBE_DISPI_INDEX_ID, id); + dispi_id = inw(VBE_DISPI_IOPORT_DATA); + + return dispi_id == id; +} + +int vbox_hw_init(struct vbox_private *vbox) +{ + int ret = -ENOMEM; + + vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA); + vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX); + + DRM_INFO("VRAM %08x\n", vbox->full_vram_size); + + /* Map guest-heap at end of vram */ + vbox->guest_heap = + pci_iomap_range(vbox->ddev.pdev, 0, GUEST_HEAP_OFFSET(vbox), + GUEST_HEAP_SIZE); + if (!vbox->guest_heap) + return -ENOMEM; + + /* Create guest-heap mem-pool use 2^4 = 16 byte chunks */ + vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1, + "vboxvideo-accel"); + if (IS_ERR(vbox->guest_pool)) + return PTR_ERR(vbox->guest_pool); + + ret = gen_pool_add_virt(vbox->guest_pool, + (unsigned long)vbox->guest_heap, + GUEST_HEAP_OFFSET(vbox), + GUEST_HEAP_USABLE_SIZE, -1); + if (ret) + return ret; + + ret = hgsmi_test_query_conf(vbox->guest_pool); + if (ret) { + DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n"); + return ret; + } + + /* Reduce available VRAM size to reflect the guest heap. */ + vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox); + /* Linux drm represents monitors as a 32-bit array. */ + hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT, + &vbox->num_crtcs); + vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS); + + if (!have_hgsmi_mode_hints(vbox)) { + ret = -ENOTSUPP; + return ret; + } + + vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs, + sizeof(struct vbva_modehint), + GFP_KERNEL); + if (!vbox->last_mode_hints) + return -ENOMEM; + + ret = vbox_accel_init(vbox); + if (ret) + return ret; + + return 0; +} + +void vbox_hw_fini(struct vbox_private *vbox) +{ + vbox_accel_fini(vbox); +} |