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