bc8828bd08
In order to support IOMMUs more generically and transparently handle the ARM SMMU on Tegra186, move to using groups instead of devices for domain attachment. An IOMMU group is a set of devices that share the same IOMMU domain and is therefore a good match to represent what Tegra DRM needs. Signed-off-by: Thierry Reding <treding@nvidia.com>
416 lines
9.1 KiB
C
416 lines
9.1 KiB
C
/*
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* Copyright (c) 2015, NVIDIA Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/host1x.h>
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#include <linux/iommu.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/reset.h>
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#include <soc/tegra/pmc.h>
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#include "drm.h"
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#include "falcon.h"
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#include "vic.h"
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struct vic_config {
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const char *firmware;
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};
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struct vic {
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struct falcon falcon;
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bool booted;
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void __iomem *regs;
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struct tegra_drm_client client;
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struct host1x_channel *channel;
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struct iommu_domain *domain;
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struct device *dev;
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struct clk *clk;
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/* Platform configuration */
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const struct vic_config *config;
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};
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static inline struct vic *to_vic(struct tegra_drm_client *client)
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{
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return container_of(client, struct vic, client);
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}
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static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
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{
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writel(value, vic->regs + offset);
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}
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static int vic_runtime_resume(struct device *dev)
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{
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struct vic *vic = dev_get_drvdata(dev);
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return clk_prepare_enable(vic->clk);
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}
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static int vic_runtime_suspend(struct device *dev)
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{
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struct vic *vic = dev_get_drvdata(dev);
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clk_disable_unprepare(vic->clk);
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vic->booted = false;
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return 0;
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}
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static int vic_boot(struct vic *vic)
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{
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u32 fce_ucode_size, fce_bin_data_offset;
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void *hdr;
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int err = 0;
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if (vic->booted)
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return 0;
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/* setup clockgating registers */
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vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
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CG_IDLE_CG_EN |
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CG_WAKEUP_DLY_CNT(4),
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NV_PVIC_MISC_PRI_VIC_CG);
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err = falcon_boot(&vic->falcon);
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if (err < 0)
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return err;
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hdr = vic->falcon.firmware.vaddr;
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fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
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hdr = vic->falcon.firmware.vaddr +
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*(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
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fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
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falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
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falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
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fce_ucode_size);
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falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
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(vic->falcon.firmware.paddr + fce_bin_data_offset)
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>> 8);
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err = falcon_wait_idle(&vic->falcon);
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if (err < 0) {
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dev_err(vic->dev,
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"failed to set application ID and FCE base\n");
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return err;
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}
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vic->booted = true;
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return 0;
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}
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static void *vic_falcon_alloc(struct falcon *falcon, size_t size,
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dma_addr_t *iova)
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{
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struct tegra_drm *tegra = falcon->data;
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return tegra_drm_alloc(tegra, size, iova);
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}
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static void vic_falcon_free(struct falcon *falcon, size_t size,
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dma_addr_t iova, void *va)
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{
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struct tegra_drm *tegra = falcon->data;
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return tegra_drm_free(tegra, size, va, iova);
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}
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static const struct falcon_ops vic_falcon_ops = {
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.alloc = vic_falcon_alloc,
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.free = vic_falcon_free
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};
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static int vic_init(struct host1x_client *client)
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{
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struct tegra_drm_client *drm = host1x_to_drm_client(client);
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struct iommu_group *group = iommu_group_get(client->dev);
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struct drm_device *dev = dev_get_drvdata(client->parent);
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struct tegra_drm *tegra = dev->dev_private;
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struct vic *vic = to_vic(drm);
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int err;
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if (group && tegra->domain) {
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err = iommu_attach_group(tegra->domain, group);
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if (err < 0) {
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dev_err(vic->dev, "failed to attach to domain: %d\n",
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err);
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return err;
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}
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vic->domain = tegra->domain;
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}
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if (!vic->falcon.data) {
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vic->falcon.data = tegra;
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err = falcon_load_firmware(&vic->falcon);
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if (err < 0)
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goto detach;
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}
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vic->channel = host1x_channel_request(client->dev);
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if (!vic->channel) {
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err = -ENOMEM;
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goto detach;
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}
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client->syncpts[0] = host1x_syncpt_request(client, 0);
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if (!client->syncpts[0]) {
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err = -ENOMEM;
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goto free_channel;
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}
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err = tegra_drm_register_client(tegra, drm);
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if (err < 0)
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goto free_syncpt;
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return 0;
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free_syncpt:
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host1x_syncpt_free(client->syncpts[0]);
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free_channel:
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host1x_channel_put(vic->channel);
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detach:
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if (group && tegra->domain)
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iommu_detach_group(tegra->domain, group);
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return err;
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}
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static int vic_exit(struct host1x_client *client)
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{
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struct tegra_drm_client *drm = host1x_to_drm_client(client);
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struct iommu_group *group = iommu_group_get(client->dev);
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struct drm_device *dev = dev_get_drvdata(client->parent);
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struct tegra_drm *tegra = dev->dev_private;
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struct vic *vic = to_vic(drm);
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int err;
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err = tegra_drm_unregister_client(tegra, drm);
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if (err < 0)
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return err;
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host1x_syncpt_free(client->syncpts[0]);
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host1x_channel_put(vic->channel);
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if (vic->domain) {
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iommu_detach_group(vic->domain, group);
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vic->domain = NULL;
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}
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return 0;
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}
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static const struct host1x_client_ops vic_client_ops = {
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.init = vic_init,
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.exit = vic_exit,
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};
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static int vic_open_channel(struct tegra_drm_client *client,
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struct tegra_drm_context *context)
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{
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struct vic *vic = to_vic(client);
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int err;
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err = pm_runtime_get_sync(vic->dev);
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if (err < 0)
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return err;
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err = vic_boot(vic);
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if (err < 0) {
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pm_runtime_put(vic->dev);
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return err;
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}
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context->channel = host1x_channel_get(vic->channel);
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if (!context->channel) {
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pm_runtime_put(vic->dev);
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return -ENOMEM;
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}
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return 0;
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}
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static void vic_close_channel(struct tegra_drm_context *context)
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{
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struct vic *vic = to_vic(context->client);
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host1x_channel_put(context->channel);
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pm_runtime_put(vic->dev);
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}
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static const struct tegra_drm_client_ops vic_ops = {
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.open_channel = vic_open_channel,
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.close_channel = vic_close_channel,
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.submit = tegra_drm_submit,
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};
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#define NVIDIA_TEGRA_124_VIC_FIRMWARE "nvidia/tegra124/vic03_ucode.bin"
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static const struct vic_config vic_t124_config = {
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.firmware = NVIDIA_TEGRA_124_VIC_FIRMWARE,
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};
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#define NVIDIA_TEGRA_210_VIC_FIRMWARE "nvidia/tegra210/vic04_ucode.bin"
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static const struct vic_config vic_t210_config = {
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.firmware = NVIDIA_TEGRA_210_VIC_FIRMWARE,
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};
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#define NVIDIA_TEGRA_186_VIC_FIRMWARE "nvidia/tegra186/vic04_ucode.bin"
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static const struct vic_config vic_t186_config = {
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.firmware = NVIDIA_TEGRA_186_VIC_FIRMWARE,
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};
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static const struct of_device_id vic_match[] = {
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{ .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
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{ .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
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{ .compatible = "nvidia,tegra186-vic", .data = &vic_t186_config },
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{ },
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};
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static int vic_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct host1x_syncpt **syncpts;
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struct resource *regs;
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struct vic *vic;
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int err;
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vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
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if (!vic)
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return -ENOMEM;
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vic->config = of_device_get_match_data(dev);
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syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
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if (!syncpts)
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return -ENOMEM;
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regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!regs) {
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dev_err(&pdev->dev, "failed to get registers\n");
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return -ENXIO;
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}
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vic->regs = devm_ioremap_resource(dev, regs);
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if (IS_ERR(vic->regs))
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return PTR_ERR(vic->regs);
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vic->clk = devm_clk_get(dev, NULL);
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if (IS_ERR(vic->clk)) {
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dev_err(&pdev->dev, "failed to get clock\n");
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return PTR_ERR(vic->clk);
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}
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vic->falcon.dev = dev;
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vic->falcon.regs = vic->regs;
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vic->falcon.ops = &vic_falcon_ops;
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err = falcon_init(&vic->falcon);
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if (err < 0)
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return err;
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err = falcon_read_firmware(&vic->falcon, vic->config->firmware);
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if (err < 0)
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goto exit_falcon;
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platform_set_drvdata(pdev, vic);
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INIT_LIST_HEAD(&vic->client.base.list);
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vic->client.base.ops = &vic_client_ops;
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vic->client.base.dev = dev;
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vic->client.base.class = HOST1X_CLASS_VIC;
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vic->client.base.syncpts = syncpts;
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vic->client.base.num_syncpts = 1;
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vic->dev = dev;
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INIT_LIST_HEAD(&vic->client.list);
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vic->client.ops = &vic_ops;
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err = host1x_client_register(&vic->client.base);
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if (err < 0) {
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dev_err(dev, "failed to register host1x client: %d\n", err);
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platform_set_drvdata(pdev, NULL);
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goto exit_falcon;
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}
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pm_runtime_enable(&pdev->dev);
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if (!pm_runtime_enabled(&pdev->dev)) {
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err = vic_runtime_resume(&pdev->dev);
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if (err < 0)
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goto unregister_client;
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}
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return 0;
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unregister_client:
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host1x_client_unregister(&vic->client.base);
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exit_falcon:
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falcon_exit(&vic->falcon);
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return err;
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}
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static int vic_remove(struct platform_device *pdev)
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{
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struct vic *vic = platform_get_drvdata(pdev);
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int err;
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err = host1x_client_unregister(&vic->client.base);
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if (err < 0) {
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dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
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err);
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return err;
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}
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if (pm_runtime_enabled(&pdev->dev))
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pm_runtime_disable(&pdev->dev);
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else
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vic_runtime_suspend(&pdev->dev);
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falcon_exit(&vic->falcon);
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return 0;
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}
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static const struct dev_pm_ops vic_pm_ops = {
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SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
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};
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struct platform_driver tegra_vic_driver = {
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.driver = {
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.name = "tegra-vic",
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.of_match_table = vic_match,
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.pm = &vic_pm_ops
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},
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.probe = vic_probe,
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.remove = vic_remove,
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};
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#if IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC)
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MODULE_FIRMWARE(NVIDIA_TEGRA_124_VIC_FIRMWARE);
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#endif
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#if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
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MODULE_FIRMWARE(NVIDIA_TEGRA_210_VIC_FIRMWARE);
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#endif
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#if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC)
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MODULE_FIRMWARE(NVIDIA_TEGRA_186_VIC_FIRMWARE);
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#endif
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