Merge tag 'drm/tegra/for-4.12-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

drm/tegra: Changes for v4.12-rc1

This contains various fixes to the host1x driver as well as a plug for a
leak of kernel pointers to userspace.

A fairly big addition this time around is the Video Image Composer (VIC)
support that can be used to accelerate some 2D and image compositing
operations.

Furthermore the driver now supports FB modifiers, so we no longer rely
on a custom IOCTL to set those.

Finally this contains a few preparatory patches for Tegra186 support
which unfortunately didn't quite make it this time, but will hopefully
be ready for v4.13.

* tag 'drm/tegra/for-4.12-rc1' of git://anongit.freedesktop.org/tegra/linux:
  gpu: host1x: Fix host1x driver shutdown
  gpu: host1x: Support module reset
  gpu: host1x: Sort includes alphabetically
  drm/tegra: Add VIC support
  dt-bindings: Add bindings for the Tegra VIC
  drm/tegra: Add falcon helper library
  drm/tegra: Add Tegra DRM allocation API
  drm/tegra: Add tiling FB modifiers
  drm/tegra: Don't leak kernel pointer to userspace
  drm/tegra: Protect IOMMU operations by mutex
  drm/tegra: Enable IOVA API when IOMMU support is enabled
  gpu: host1x: Add IOMMU support
  gpu: host1x: Fix potential out-of-bounds access
  iommu/iova: Fix compile error with CONFIG_IOMMU_IOVA=m
  iommu: Add dummy implementations for !IOMMU_IOVA
  MAINTAINERS: Add related headers to IOMMU section
  iommu/iova: Consolidate code for adding new node to iovad domain rbtree

1 files changed, 396 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
new file mode 100644
index 000000000000..cd804e404a11
--- /dev/null
+++ b/drivers/gpu/drm/tegra/vic.c
@@ -0,0 +1,396 @@
+/*
+ * Copyright (c) 2015, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/host1x.h>
+#include <linux/iommu.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <soc/tegra/pmc.h>
+
+#include "drm.h"
+#include "falcon.h"
+#include "vic.h"
+
+struct vic_config {
+	const char *firmware;
+};
+
+struct vic {
+	struct falcon falcon;
+	bool booted;
+
+	void __iomem *regs;
+	struct tegra_drm_client client;
+	struct host1x_channel *channel;
+	struct iommu_domain *domain;
+	struct device *dev;
+	struct clk *clk;
+
+	/* Platform configuration */
+	const struct vic_config *config;
+};
+
+static inline struct vic *to_vic(struct tegra_drm_client *client)
+{
+	return container_of(client, struct vic, client);
+}
+
+static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
+{
+	writel(value, vic->regs + offset);
+}
+
+static int vic_runtime_resume(struct device *dev)
+{
+	struct vic *vic = dev_get_drvdata(dev);
+
+	return clk_prepare_enable(vic->clk);
+}
+
+static int vic_runtime_suspend(struct device *dev)
+{
+	struct vic *vic = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(vic->clk);
+
+	vic->booted = false;
+
+	return 0;
+}
+
+static int vic_boot(struct vic *vic)
+{
+	u32 fce_ucode_size, fce_bin_data_offset;
+	void *hdr;
+	int err = 0;
+
+	if (vic->booted)
+		return 0;
+
+	/* setup clockgating registers */
+	vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
+			CG_IDLE_CG_EN |
+			CG_WAKEUP_DLY_CNT(4),
+		   NV_PVIC_MISC_PRI_VIC_CG);
+
+	err = falcon_boot(&vic->falcon);
+	if (err < 0)
+		return err;
+
+	hdr = vic->falcon.firmware.vaddr;
+	fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
+	hdr = vic->falcon.firmware.vaddr +
+		*(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
+	fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
+
+	falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
+	falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
+			      fce_ucode_size);
+	falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
+			      (vic->falcon.firmware.paddr + fce_bin_data_offset)
+				>> 8);
+
+	err = falcon_wait_idle(&vic->falcon);
+	if (err < 0) {
+		dev_err(vic->dev,
+			"failed to set application ID and FCE base\n");
+		return err;
+	}
+
+	vic->booted = true;
+
+	return 0;
+}
+
+static void *vic_falcon_alloc(struct falcon *falcon, size_t size,
+			       dma_addr_t *iova)
+{
+	struct tegra_drm *tegra = falcon->data;
+
+	return tegra_drm_alloc(tegra, size, iova);
+}
+
+static void vic_falcon_free(struct falcon *falcon, size_t size,
+			    dma_addr_t iova, void *va)
+{
+	struct tegra_drm *tegra = falcon->data;
+
+	return tegra_drm_free(tegra, size, va, iova);
+}
+
+static const struct falcon_ops vic_falcon_ops = {
+	.alloc = vic_falcon_alloc,
+	.free = vic_falcon_free
+};
+
+static int vic_init(struct host1x_client *client)
+{
+	struct tegra_drm_client *drm = host1x_to_drm_client(client);
+	struct drm_device *dev = dev_get_drvdata(client->parent);
+	struct tegra_drm *tegra = dev->dev_private;
+	struct vic *vic = to_vic(drm);
+	int err;
+
+	if (tegra->domain) {
+		err = iommu_attach_device(tegra->domain, vic->dev);
+		if (err < 0) {
+			dev_err(vic->dev, "failed to attach to domain: %d\n",
+				err);
+			return err;
+		}
+
+		vic->domain = tegra->domain;
+	}
+
+	if (!vic->falcon.data) {
+		vic->falcon.data = tegra;
+		err = falcon_load_firmware(&vic->falcon);
+		if (err < 0)
+			goto detach_device;
+	}
+
+	vic->channel = host1x_channel_request(client->dev);
+	if (!vic->channel) {
+		err = -ENOMEM;
+		goto detach_device;
+	}
+
+	client->syncpts[0] = host1x_syncpt_request(client->dev, 0);
+	if (!client->syncpts[0]) {
+		err = -ENOMEM;
+		goto free_channel;
+	}
+
+	err = tegra_drm_register_client(tegra, drm);
+	if (err < 0)
+		goto free_syncpt;
+
+	return 0;
+
+free_syncpt:
+	host1x_syncpt_free(client->syncpts[0]);
+free_channel:
+	host1x_channel_free(vic->channel);
+detach_device:
+	if (tegra->domain)
+		iommu_detach_device(tegra->domain, vic->dev);
+
+	return err;
+}
+
+static int vic_exit(struct host1x_client *client)
+{
+	struct tegra_drm_client *drm = host1x_to_drm_client(client);
+	struct drm_device *dev = dev_get_drvdata(client->parent);
+	struct tegra_drm *tegra = dev->dev_private;
+	struct vic *vic = to_vic(drm);
+	int err;
+
+	err = tegra_drm_unregister_client(tegra, drm);
+	if (err < 0)
+		return err;
+
+	host1x_syncpt_free(client->syncpts[0]);
+	host1x_channel_free(vic->channel);
+
+	if (vic->domain) {
+		iommu_detach_device(vic->domain, vic->dev);
+		vic->domain = NULL;
+	}
+
+	return 0;
+}
+
+static const struct host1x_client_ops vic_client_ops = {
+	.init = vic_init,
+	.exit = vic_exit,
+};
+
+static int vic_open_channel(struct tegra_drm_client *client,
+			    struct tegra_drm_context *context)
+{
+	struct vic *vic = to_vic(client);
+	int err;
+
+	err = pm_runtime_get_sync(vic->dev);
+	if (err < 0)
+		return err;
+
+	err = vic_boot(vic);
+	if (err < 0) {
+		pm_runtime_put(vic->dev);
+		return err;
+	}
+
+	context->channel = host1x_channel_get(vic->channel);
+	if (!context->channel) {
+		pm_runtime_put(vic->dev);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void vic_close_channel(struct tegra_drm_context *context)
+{
+	struct vic *vic = to_vic(context->client);
+
+	host1x_channel_put(context->channel);
+
+	pm_runtime_put(vic->dev);
+}
+
+static const struct tegra_drm_client_ops vic_ops = {
+	.open_channel = vic_open_channel,
+	.close_channel = vic_close_channel,
+	.submit = tegra_drm_submit,
+};
+
+static const struct vic_config vic_t124_config = {
+	.firmware = "nvidia/tegra124/vic03_ucode.bin",
+};
+
+static const struct vic_config vic_t210_config = {
+	.firmware = "nvidia/tegra210/vic04_ucode.bin",
+};
+
+static const struct of_device_id vic_match[] = {
+	{ .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
+	{ .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
+	{ },
+};
+
+static int vic_probe(struct platform_device *pdev)
+{
+	struct vic_config *vic_config = NULL;
+	struct device *dev = &pdev->dev;
+	struct host1x_syncpt **syncpts;
+	struct resource *regs;
+	const struct of_device_id *match;
+	struct vic *vic;
+	int err;
+
+	match = of_match_device(vic_match, dev);
+	vic_config = (struct vic_config *)match->data;
+
+	vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
+	if (!vic)
+		return -ENOMEM;
+
+	syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
+	if (!syncpts)
+		return -ENOMEM;
+
+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!regs) {
+		dev_err(&pdev->dev, "failed to get registers\n");
+		return -ENXIO;
+	}
+
+	vic->regs = devm_ioremap_resource(dev, regs);
+	if (IS_ERR(vic->regs))
+		return PTR_ERR(vic->regs);
+
+	vic->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(vic->clk)) {
+		dev_err(&pdev->dev, "failed to get clock\n");
+		return PTR_ERR(vic->clk);
+	}
+
+	vic->falcon.dev = dev;
+	vic->falcon.regs = vic->regs;
+	vic->falcon.ops = &vic_falcon_ops;
+
+	err = falcon_init(&vic->falcon);
+	if (err < 0)
+		return err;
+
+	err = falcon_read_firmware(&vic->falcon, vic_config->firmware);
+	if (err < 0)
+		goto exit_falcon;
+
+	platform_set_drvdata(pdev, vic);
+
+	INIT_LIST_HEAD(&vic->client.base.list);
+	vic->client.base.ops = &vic_client_ops;
+	vic->client.base.dev = dev;
+	vic->client.base.class = HOST1X_CLASS_VIC;
+	vic->client.base.syncpts = syncpts;
+	vic->client.base.num_syncpts = 1;
+	vic->dev = dev;
+	vic->config = vic_config;
+
+	INIT_LIST_HEAD(&vic->client.list);
+	vic->client.ops = &vic_ops;
+
+	err = host1x_client_register(&vic->client.base);
+	if (err < 0) {
+		dev_err(dev, "failed to register host1x client: %d\n", err);
+		platform_set_drvdata(pdev, NULL);
+		goto exit_falcon;
+	}
+
+	pm_runtime_enable(&pdev->dev);
+	if (!pm_runtime_enabled(&pdev->dev)) {
+		err = vic_runtime_resume(&pdev->dev);
+		if (err < 0)
+			goto unregister_client;
+	}
+
+	return 0;
+
+unregister_client:
+	host1x_client_unregister(&vic->client.base);
+exit_falcon:
+	falcon_exit(&vic->falcon);
+
+	return err;
+}
+
+static int vic_remove(struct platform_device *pdev)
+{
+	struct vic *vic = platform_get_drvdata(pdev);
+	int err;
+
+	err = host1x_client_unregister(&vic->client.base);
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
+			err);
+		return err;
+	}
+
+	if (pm_runtime_enabled(&pdev->dev))
+		pm_runtime_disable(&pdev->dev);
+	else
+		vic_runtime_suspend(&pdev->dev);
+
+	falcon_exit(&vic->falcon);
+
+	return 0;
+}
+
+static const struct dev_pm_ops vic_pm_ops = {
+	SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
+};
+
+struct platform_driver tegra_vic_driver = {
+	.driver = {
+		.name = "tegra-vic",
+		.of_match_table = vic_match,
+		.pm = &vic_pm_ops
+	},
+	.probe = vic_probe,
+	.remove = vic_remove,
+};