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path: root/drivers/gpu/drm/tegra/vic.c
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Diffstat (limited to 'drivers/gpu/drm/tegra/vic.c')
-rw-r--r--drivers/gpu/drm/tegra/vic.c597
1 files changed, 597 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
new file mode 100644
index 000000000..7382ee132
--- /dev/null
+++ b/drivers/gpu/drm/tegra/vic.c
@@ -0,0 +1,597 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015, NVIDIA Corporation.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.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;
+ unsigned int version;
+ bool supports_sid;
+};
+
+struct vic {
+ struct falcon falcon;
+
+ void __iomem *regs;
+ struct tegra_drm_client client;
+ struct host1x_channel *channel;
+ struct device *dev;
+ struct clk *clk;
+ struct reset_control *rst;
+
+ bool can_use_context;
+
+ /* 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_boot(struct vic *vic)
+{
+#ifdef CONFIG_IOMMU_API
+ struct iommu_fwspec *spec = dev_iommu_fwspec_get(vic->dev);
+#endif
+ u32 fce_ucode_size, fce_bin_data_offset;
+ void *hdr;
+ int err = 0;
+
+#ifdef CONFIG_IOMMU_API
+ if (vic->config->supports_sid && spec) {
+ u32 value;
+
+ value = TRANSCFG_ATT(1, TRANSCFG_SID_FALCON) |
+ TRANSCFG_ATT(0, TRANSCFG_SID_HW);
+ vic_writel(vic, value, VIC_TFBIF_TRANSCFG);
+
+ if (spec->num_ids > 0) {
+ value = spec->ids[0] & 0xffff;
+
+ /*
+ * STREAMID0 is used for input/output buffers.
+ * Initialize it to SID_VIC in case context isolation
+ * is not enabled, and SID_VIC is used for both firmware
+ * and data buffers.
+ *
+ * If context isolation is enabled, it will be
+ * overridden by the SETSTREAMID opcode as part of
+ * each job.
+ */
+ vic_writel(vic, value, VIC_THI_STREAMID0);
+
+ /* STREAMID1 is used for firmware loading. */
+ vic_writel(vic, value, VIC_THI_STREAMID1);
+ }
+ }
+#endif
+
+ /* 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.virt;
+ fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
+
+ /* Old VIC firmware needs kernel help with setting up FCE microcode. */
+ if (fce_bin_data_offset != 0x0 && fce_bin_data_offset != 0xa5a5a5a5) {
+ hdr = vic->falcon.firmware.virt +
+ *(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
+ fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
+
+ 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.iova + 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;
+ }
+
+ return 0;
+}
+
+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->host);
+ struct tegra_drm *tegra = dev->dev_private;
+ struct vic *vic = to_vic(drm);
+ int err;
+
+ err = host1x_client_iommu_attach(client);
+ if (err < 0 && err != -ENODEV) {
+ dev_err(vic->dev, "failed to attach to domain: %d\n", err);
+ return err;
+ }
+
+ vic->channel = host1x_channel_request(client);
+ if (!vic->channel) {
+ err = -ENOMEM;
+ goto detach;
+ }
+
+ client->syncpts[0] = host1x_syncpt_request(client, 0);
+ if (!client->syncpts[0]) {
+ err = -ENOMEM;
+ goto free_channel;
+ }
+
+ pm_runtime_enable(client->dev);
+ pm_runtime_use_autosuspend(client->dev);
+ pm_runtime_set_autosuspend_delay(client->dev, 500);
+
+ err = tegra_drm_register_client(tegra, drm);
+ if (err < 0)
+ goto disable_rpm;
+
+ /*
+ * Inherit the DMA parameters (such as maximum segment size) from the
+ * parent host1x device.
+ */
+ client->dev->dma_parms = client->host->dma_parms;
+
+ return 0;
+
+disable_rpm:
+ pm_runtime_dont_use_autosuspend(client->dev);
+ pm_runtime_force_suspend(client->dev);
+
+ host1x_syncpt_put(client->syncpts[0]);
+free_channel:
+ host1x_channel_put(vic->channel);
+detach:
+ host1x_client_iommu_detach(client);
+
+ 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->host);
+ struct tegra_drm *tegra = dev->dev_private;
+ struct vic *vic = to_vic(drm);
+ int err;
+
+ /* avoid a dangling pointer just in case this disappears */
+ client->dev->dma_parms = NULL;
+
+ err = tegra_drm_unregister_client(tegra, drm);
+ if (err < 0)
+ return err;
+
+ pm_runtime_dont_use_autosuspend(client->dev);
+ pm_runtime_force_suspend(client->dev);
+
+ host1x_syncpt_put(client->syncpts[0]);
+ host1x_channel_put(vic->channel);
+ host1x_client_iommu_detach(client);
+
+ vic->channel = NULL;
+
+ if (client->group) {
+ dma_unmap_single(vic->dev, vic->falcon.firmware.phys,
+ vic->falcon.firmware.size, DMA_TO_DEVICE);
+ tegra_drm_free(tegra, vic->falcon.firmware.size,
+ vic->falcon.firmware.virt,
+ vic->falcon.firmware.iova);
+ } else {
+ dma_free_coherent(vic->dev, vic->falcon.firmware.size,
+ vic->falcon.firmware.virt,
+ vic->falcon.firmware.iova);
+ }
+
+ return 0;
+}
+
+static const struct host1x_client_ops vic_client_ops = {
+ .init = vic_init,
+ .exit = vic_exit,
+};
+
+static int vic_load_firmware(struct vic *vic)
+{
+ struct host1x_client *client = &vic->client.base;
+ struct tegra_drm *tegra = vic->client.drm;
+ static DEFINE_MUTEX(lock);
+ u32 fce_bin_data_offset;
+ dma_addr_t iova;
+ size_t size;
+ void *virt;
+ int err;
+
+ mutex_lock(&lock);
+
+ if (vic->falcon.firmware.virt) {
+ err = 0;
+ goto unlock;
+ }
+
+ err = falcon_read_firmware(&vic->falcon, vic->config->firmware);
+ if (err < 0)
+ goto unlock;
+
+ size = vic->falcon.firmware.size;
+
+ if (!client->group) {
+ virt = dma_alloc_coherent(vic->dev, size, &iova, GFP_KERNEL);
+ if (!virt) {
+ err = -ENOMEM;
+ goto unlock;
+ }
+ } else {
+ virt = tegra_drm_alloc(tegra, size, &iova);
+ if (IS_ERR(virt)) {
+ err = PTR_ERR(virt);
+ goto unlock;
+ }
+ }
+
+ vic->falcon.firmware.virt = virt;
+ vic->falcon.firmware.iova = iova;
+
+ err = falcon_load_firmware(&vic->falcon);
+ if (err < 0)
+ goto cleanup;
+
+ /*
+ * In this case we have received an IOVA from the shared domain, so we
+ * need to make sure to get the physical address so that the DMA API
+ * knows what memory pages to flush the cache for.
+ */
+ if (client->group) {
+ dma_addr_t phys;
+
+ phys = dma_map_single(vic->dev, virt, size, DMA_TO_DEVICE);
+
+ err = dma_mapping_error(vic->dev, phys);
+ if (err < 0)
+ goto cleanup;
+
+ vic->falcon.firmware.phys = phys;
+ }
+
+ /*
+ * Check if firmware is new enough to not require mapping firmware
+ * to data buffer domains.
+ */
+ fce_bin_data_offset = *(u32 *)(virt + VIC_UCODE_FCE_DATA_OFFSET);
+
+ if (!vic->config->supports_sid) {
+ vic->can_use_context = false;
+ } else if (fce_bin_data_offset != 0x0 && fce_bin_data_offset != 0xa5a5a5a5) {
+ /*
+ * Firmware will access FCE through STREAMID0, so context
+ * isolation cannot be used.
+ */
+ vic->can_use_context = false;
+ dev_warn_once(vic->dev, "context isolation disabled due to old firmware\n");
+ } else {
+ vic->can_use_context = true;
+ }
+
+unlock:
+ mutex_unlock(&lock);
+ return err;
+
+cleanup:
+ if (!client->group)
+ dma_free_coherent(vic->dev, size, virt, iova);
+ else
+ tegra_drm_free(tegra, size, virt, iova);
+
+ mutex_unlock(&lock);
+ return err;
+}
+
+
+static int __maybe_unused vic_runtime_resume(struct device *dev)
+{
+ struct vic *vic = dev_get_drvdata(dev);
+ int err;
+
+ err = clk_prepare_enable(vic->clk);
+ if (err < 0)
+ return err;
+
+ usleep_range(10, 20);
+
+ err = reset_control_deassert(vic->rst);
+ if (err < 0)
+ goto disable;
+
+ usleep_range(10, 20);
+
+ err = vic_load_firmware(vic);
+ if (err < 0)
+ goto assert;
+
+ err = vic_boot(vic);
+ if (err < 0)
+ goto assert;
+
+ return 0;
+
+assert:
+ reset_control_assert(vic->rst);
+disable:
+ clk_disable_unprepare(vic->clk);
+ return err;
+}
+
+static int __maybe_unused vic_runtime_suspend(struct device *dev)
+{
+ struct vic *vic = dev_get_drvdata(dev);
+ int err;
+
+ host1x_channel_stop(vic->channel);
+
+ err = reset_control_assert(vic->rst);
+ if (err < 0)
+ return err;
+
+ usleep_range(2000, 4000);
+
+ clk_disable_unprepare(vic->clk);
+
+ return 0;
+}
+
+static int vic_open_channel(struct tegra_drm_client *client,
+ struct tegra_drm_context *context)
+{
+ struct vic *vic = to_vic(client);
+
+ context->channel = host1x_channel_get(vic->channel);
+ if (!context->channel)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void vic_close_channel(struct tegra_drm_context *context)
+{
+ host1x_channel_put(context->channel);
+}
+
+static int vic_can_use_memory_ctx(struct tegra_drm_client *client, bool *supported)
+{
+ struct vic *vic = to_vic(client);
+ int err;
+
+ /* This doesn't access HW so it's safe to call without powering up. */
+ err = vic_load_firmware(vic);
+ if (err < 0)
+ return err;
+
+ *supported = vic->can_use_context;
+
+ return 0;
+}
+
+static const struct tegra_drm_client_ops vic_ops = {
+ .open_channel = vic_open_channel,
+ .close_channel = vic_close_channel,
+ .submit = tegra_drm_submit,
+ .get_streamid_offset = tegra_drm_get_streamid_offset_thi,
+ .can_use_memory_ctx = vic_can_use_memory_ctx,
+};
+
+#define NVIDIA_TEGRA_124_VIC_FIRMWARE "nvidia/tegra124/vic03_ucode.bin"
+
+static const struct vic_config vic_t124_config = {
+ .firmware = NVIDIA_TEGRA_124_VIC_FIRMWARE,
+ .version = 0x40,
+ .supports_sid = false,
+};
+
+#define NVIDIA_TEGRA_210_VIC_FIRMWARE "nvidia/tegra210/vic04_ucode.bin"
+
+static const struct vic_config vic_t210_config = {
+ .firmware = NVIDIA_TEGRA_210_VIC_FIRMWARE,
+ .version = 0x21,
+ .supports_sid = false,
+};
+
+#define NVIDIA_TEGRA_186_VIC_FIRMWARE "nvidia/tegra186/vic04_ucode.bin"
+
+static const struct vic_config vic_t186_config = {
+ .firmware = NVIDIA_TEGRA_186_VIC_FIRMWARE,
+ .version = 0x18,
+ .supports_sid = true,
+};
+
+#define NVIDIA_TEGRA_194_VIC_FIRMWARE "nvidia/tegra194/vic.bin"
+
+static const struct vic_config vic_t194_config = {
+ .firmware = NVIDIA_TEGRA_194_VIC_FIRMWARE,
+ .version = 0x19,
+ .supports_sid = true,
+};
+
+#define NVIDIA_TEGRA_234_VIC_FIRMWARE "nvidia/tegra234/vic.bin"
+
+static const struct vic_config vic_t234_config = {
+ .firmware = NVIDIA_TEGRA_234_VIC_FIRMWARE,
+ .version = 0x23,
+ .supports_sid = true,
+};
+
+static const struct of_device_id tegra_vic_of_match[] = {
+ { .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
+ { .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
+ { .compatible = "nvidia,tegra186-vic", .data = &vic_t186_config },
+ { .compatible = "nvidia,tegra194-vic", .data = &vic_t194_config },
+ { .compatible = "nvidia,tegra234-vic", .data = &vic_t234_config },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tegra_vic_of_match);
+
+static int vic_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct host1x_syncpt **syncpts;
+ struct vic *vic;
+ int err;
+
+ /* inherit DMA mask from host1x parent */
+ err = dma_coerce_mask_and_coherent(dev, *dev->parent->dma_mask);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
+ return err;
+ }
+
+ vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
+ if (!vic)
+ return -ENOMEM;
+
+ vic->config = of_device_get_match_data(dev);
+
+ syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
+ if (!syncpts)
+ return -ENOMEM;
+
+ vic->regs = devm_platform_ioremap_resource(pdev, 0);
+ 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);
+ }
+
+ err = clk_set_rate(vic->clk, ULONG_MAX);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to set clock rate\n");
+ return err;
+ }
+
+ if (!dev->pm_domain) {
+ vic->rst = devm_reset_control_get(dev, "vic");
+ if (IS_ERR(vic->rst)) {
+ dev_err(&pdev->dev, "failed to get reset\n");
+ return PTR_ERR(vic->rst);
+ }
+ }
+
+ vic->falcon.dev = dev;
+ vic->falcon.regs = vic->regs;
+
+ err = falcon_init(&vic->falcon);
+ if (err < 0)
+ return err;
+
+ 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;
+
+ INIT_LIST_HEAD(&vic->client.list);
+ vic->client.version = vic->config->version;
+ 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);
+ goto exit_falcon;
+ }
+
+ return 0;
+
+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;
+ }
+
+ falcon_exit(&vic->falcon);
+
+ return 0;
+}
+
+static const struct dev_pm_ops vic_pm_ops = {
+ RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
+ SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
+};
+
+struct platform_driver tegra_vic_driver = {
+ .driver = {
+ .name = "tegra-vic",
+ .of_match_table = tegra_vic_of_match,
+ .pm = &vic_pm_ops
+ },
+ .probe = vic_probe,
+ .remove = vic_remove,
+};
+
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC)
+MODULE_FIRMWARE(NVIDIA_TEGRA_124_VIC_FIRMWARE);
+#endif
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
+MODULE_FIRMWARE(NVIDIA_TEGRA_210_VIC_FIRMWARE);
+#endif
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC)
+MODULE_FIRMWARE(NVIDIA_TEGRA_186_VIC_FIRMWARE);
+#endif
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC)
+MODULE_FIRMWARE(NVIDIA_TEGRA_194_VIC_FIRMWARE);
+#endif
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_234_SOC)
+MODULE_FIRMWARE(NVIDIA_TEGRA_234_VIC_FIRMWARE);
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 12:47:10 +0000