drm.c (0301196b5719341ba98223eed9a0e6ea4eab615a) drm.c (aacdf19849734d1be5e407932228ae101ba5b92f)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Avionic Design GmbH
4 * Copyright (C) 2012-2016 NVIDIA CORPORATION. All rights reserved.
5 */
6
7#include <linux/bitops.h>
8#include <linux/host1x.h>

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1063 mutex_lock(&tegra->clients_lock);
1064 list_del_init(&client->list);
1065 client->drm = NULL;
1066 mutex_unlock(&tegra->clients_lock);
1067
1068 return 0;
1069}
1070
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Avionic Design GmbH
4 * Copyright (C) 2012-2016 NVIDIA CORPORATION. All rights reserved.
5 */
6
7#include <linux/bitops.h>
8#include <linux/host1x.h>

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1063 mutex_lock(&tegra->clients_lock);
1064 list_del_init(&client->list);
1065 client->drm = NULL;
1066 mutex_unlock(&tegra->clients_lock);
1067
1068 return 0;
1069}
1070
1071struct iommu_group *host1x_client_iommu_attach(struct host1x_client *client,
1072 bool shared)
1071int host1x_client_iommu_attach(struct host1x_client *client, bool shared)
1073{
1074 struct drm_device *drm = dev_get_drvdata(client->parent);
1075 struct tegra_drm *tegra = drm->dev_private;
1076 struct iommu_group *group = NULL;
1077 int err;
1078
1079 if (tegra->domain) {
1080 group = iommu_group_get(client->dev);
1081 if (!group) {
1082 dev_err(client->dev, "failed to get IOMMU group\n");
1072{
1073 struct drm_device *drm = dev_get_drvdata(client->parent);
1074 struct tegra_drm *tegra = drm->dev_private;
1075 struct iommu_group *group = NULL;
1076 int err;
1077
1078 if (tegra->domain) {
1079 group = iommu_group_get(client->dev);
1080 if (!group) {
1081 dev_err(client->dev, "failed to get IOMMU group\n");
1083 return ERR_PTR(-ENODEV);
1082 return -ENODEV;
1084 }
1085
1086 if (!shared || (shared && (group != tegra->group))) {
1087#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
1088 if (client->dev->archdata.mapping) {
1089 struct dma_iommu_mapping *mapping =
1090 to_dma_iommu_mapping(client->dev);
1091 arm_iommu_detach_device(client->dev);
1092 arm_iommu_release_mapping(mapping);
1093 }
1094#endif
1095 err = iommu_attach_group(tegra->domain, group);
1096 if (err < 0) {
1097 iommu_group_put(group);
1083 }
1084
1085 if (!shared || (shared && (group != tegra->group))) {
1086#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
1087 if (client->dev->archdata.mapping) {
1088 struct dma_iommu_mapping *mapping =
1089 to_dma_iommu_mapping(client->dev);
1090 arm_iommu_detach_device(client->dev);
1091 arm_iommu_release_mapping(mapping);
1092 }
1093#endif
1094 err = iommu_attach_group(tegra->domain, group);
1095 if (err < 0) {
1096 iommu_group_put(group);
1098 return ERR_PTR(err);
1097 return err;
1099 }
1100
1101 if (shared && !tegra->group)
1102 tegra->group = group;
1103 }
1104 }
1105
1098 }
1099
1100 if (shared && !tegra->group)
1101 tegra->group = group;
1102 }
1103 }
1104
1106 return group;
1105 client->group = group;
1106
1107 return 0;
1107}
1108
1108}
1109
1109void host1x_client_iommu_detach(struct host1x_client *client,
1110 struct iommu_group *group)
1110void host1x_client_iommu_detach(struct host1x_client *client)
1111{
1112 struct drm_device *drm = dev_get_drvdata(client->parent);
1113 struct tegra_drm *tegra = drm->dev_private;
1114
1111{
1112 struct drm_device *drm = dev_get_drvdata(client->parent);
1113 struct tegra_drm *tegra = drm->dev_private;
1114
1115 if (group) {
1116 if (group == tegra->group) {
1117 iommu_detach_group(tegra->domain, group);
1115 if (client->group) {
1116 if (client->group == tegra->group) {
1117 iommu_detach_group(tegra->domain, client->group);
1118 tegra->group = NULL;
1119 }
1120
1118 tegra->group = NULL;
1119 }
1120
1121 iommu_group_put(group);
1121 iommu_group_put(client->group);
1122 }
1123}
1124
1125void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma)
1126{
1127 struct iova *alloc;
1128 void *virt;
1129 gfp_t gfp;

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1123}
1124
1125void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *dma)
1126{
1127 struct iova *alloc;
1128 void *virt;
1129 gfp_t gfp;

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