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// 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);
pci_iounmap(vbox->ddev.pdev, vbox->vbva_buffers);
}
/* 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 = gen_pool_create(4, -1);
if (!vbox->guest_pool)
goto err_unmap_guest_heap;
ret = gen_pool_add_virt(vbox->guest_pool,
(unsigned long)vbox->guest_heap,
GUEST_HEAP_OFFSET(vbox),
GUEST_HEAP_USABLE_SIZE, -1);
if (ret)
goto err_destroy_guest_pool;
ret = hgsmi_test_query_conf(vbox->guest_pool);
if (ret) {
DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");
goto err_destroy_guest_pool;
}
/* 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;
goto err_destroy_guest_pool;
}
vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
sizeof(struct vbva_modehint),
GFP_KERNEL);
if (!vbox->last_mode_hints) {
ret = -ENOMEM;
goto err_destroy_guest_pool;
}
ret = vbox_accel_init(vbox);
if (ret)
goto err_destroy_guest_pool;
return 0;
err_destroy_guest_pool:
gen_pool_destroy(vbox->guest_pool);
err_unmap_guest_heap:
pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
return ret;
}
void vbox_hw_fini(struct vbox_private *vbox)
{
vbox_accel_fini(vbox);
gen_pool_destroy(vbox->guest_pool);
pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
}
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