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brintos / linux-shallow public Read only

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1// SPDX-License-Identifier: MIT2/*3 * Copyright (C) 2013-2017 Oracle Corporation4 * This file is based on ast_main.c5 * Copyright 2012 Red Hat Inc.6 * Authors: Dave Airlie <airlied@redhat.com>,7 *          Michael Thayer <michael.thayer@oracle.com,8 *          Hans de Goede <hdegoede@redhat.com>9 */10 11#include <linux/pci.h>12#include <linux/vbox_err.h>13 14#include <drm/drm_damage_helper.h>15 16#include "vbox_drv.h"17#include "vboxvideo_guest.h"18#include "vboxvideo_vbe.h"19 20void vbox_report_caps(struct vbox_private *vbox)21{22	u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION |23		   VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY;24 25	/* The host only accepts VIDEO_MODE_HINTS if it is send separately. */26	hgsmi_send_caps_info(vbox->guest_pool, caps);27	caps |= VBVACAPS_VIDEO_MODE_HINTS;28	hgsmi_send_caps_info(vbox->guest_pool, caps);29}30 31static int vbox_accel_init(struct vbox_private *vbox)32{33	struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev);34	struct vbva_buffer *vbva;35	unsigned int i;36 37	vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,38				       sizeof(*vbox->vbva_info), GFP_KERNEL);39	if (!vbox->vbva_info)40		return -ENOMEM;41 42	/* Take a command buffer for each screen from the end of usable VRAM. */43	vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;44 45	vbox->vbva_buffers = pcim_iomap_range(46			pdev, 0, vbox->available_vram_size,47			vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE);48	if (IS_ERR(vbox->vbva_buffers))49		return PTR_ERR(vbox->vbva_buffers);50 51	for (i = 0; i < vbox->num_crtcs; ++i) {52		vbva_setup_buffer_context(&vbox->vbva_info[i],53					  vbox->available_vram_size +54					  i * VBVA_MIN_BUFFER_SIZE,55					  VBVA_MIN_BUFFER_SIZE);56		vbva = (void __force *)vbox->vbva_buffers +57			i * VBVA_MIN_BUFFER_SIZE;58		if (!vbva_enable(&vbox->vbva_info[i],59				 vbox->guest_pool, vbva, i)) {60			/* very old host or driver error. */61			DRM_ERROR("vboxvideo: vbva_enable failed\n");62		}63	}64 65	return 0;66}67 68static void vbox_accel_fini(struct vbox_private *vbox)69{70	unsigned int i;71 72	for (i = 0; i < vbox->num_crtcs; ++i)73		vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);74}75 76/* Do we support the 4.3 plus mode hint reporting interface? */77static bool have_hgsmi_mode_hints(struct vbox_private *vbox)78{79	u32 have_hints, have_cursor;80	int ret;81 82	ret = hgsmi_query_conf(vbox->guest_pool,83			       VBOX_VBVA_CONF32_MODE_HINT_REPORTING,84			       &have_hints);85	if (ret)86		return false;87 88	ret = hgsmi_query_conf(vbox->guest_pool,89			       VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,90			       &have_cursor);91	if (ret)92		return false;93 94	return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;95}96 97bool vbox_check_supported(u16 id)98{99	u16 dispi_id;100 101	vbox_write_ioport(VBE_DISPI_INDEX_ID, id);102	dispi_id = inw(VBE_DISPI_IOPORT_DATA);103 104	return dispi_id == id;105}106 107int vbox_hw_init(struct vbox_private *vbox)108{109	struct pci_dev *pdev = to_pci_dev(vbox->ddev.dev);110	int ret = -ENOMEM;111 112	vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);113	vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);114 115	DRM_INFO("VRAM %08x\n", vbox->full_vram_size);116 117	ret = pcim_request_region(pdev, 0, "vboxvideo");118	if (ret)119		return ret;120 121	/* Map guest-heap at end of vram */122	vbox->guest_heap = pcim_iomap_range(pdev, 0,123			GUEST_HEAP_OFFSET(vbox), GUEST_HEAP_SIZE);124	if (IS_ERR(vbox->guest_heap))125		return PTR_ERR(vbox->guest_heap);126 127	/* Create guest-heap mem-pool use 2^4 = 16 byte chunks */128	vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1,129						"vboxvideo-accel");130	if (IS_ERR(vbox->guest_pool))131		return PTR_ERR(vbox->guest_pool);132 133	ret = gen_pool_add_virt(vbox->guest_pool,134				(unsigned long)vbox->guest_heap,135				GUEST_HEAP_OFFSET(vbox),136				GUEST_HEAP_USABLE_SIZE, -1);137	if (ret)138		return ret;139 140	ret = hgsmi_test_query_conf(vbox->guest_pool);141	if (ret) {142		DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");143		return ret;144	}145 146	/* Reduce available VRAM size to reflect the guest heap. */147	vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);148	/* Linux drm represents monitors as a 32-bit array. */149	hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,150			 &vbox->num_crtcs);151	vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);152 153	if (!have_hgsmi_mode_hints(vbox)) {154		ret = -ENOTSUPP;155		return ret;156	}157 158	vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,159					     sizeof(struct vbva_modehint),160					     GFP_KERNEL);161	if (!vbox->last_mode_hints)162		return -ENOMEM;163 164	ret = vbox_accel_init(vbox);165	if (ret)166		return ret;167 168	return 0;169}170 171void vbox_hw_fini(struct vbox_private *vbox)172{173	vbox_accel_fini(vbox);174}175