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linux-zen-server/drivers/gpu/drm/tegra/gr3d.c

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Initial commit
2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Avionic Design GmbH
* Copyright (C) 2013 NVIDIA Corporation
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/host1x.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_opp.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <soc/tegra/common.h>
#include <soc/tegra/pmc.h>
#include "drm.h"
#include "gem.h"
#include "gr3d.h"
enum {
RST_MC,
RST_GR3D,
RST_MC2,
RST_GR3D2,
RST_GR3D_MAX,
};
struct gr3d_soc {
unsigned int version;
unsigned int num_clocks;
unsigned int num_resets;
};
struct gr3d {
struct tegra_drm_client client;
struct host1x_channel *channel;
const struct gr3d_soc *soc;
struct clk_bulk_data *clocks;
unsigned int nclocks;
struct reset_control_bulk_data resets[RST_GR3D_MAX];
unsigned int nresets;
DECLARE_BITMAP(addr_regs, GR3D_NUM_REGS);
};
static inline struct gr3d *to_gr3d(struct tegra_drm_client *client)
{
return container_of(client, struct gr3d, client);
}
static int gr3d_init(struct host1x_client *client)
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct drm_device *dev = dev_get_drvdata(client->host);
unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
struct gr3d *gr3d = to_gr3d(drm);
int err;
gr3d->channel = host1x_channel_request(client);
if (!gr3d->channel)
return -ENOMEM;
client->syncpts[0] = host1x_syncpt_request(client, flags);
if (!client->syncpts[0]) {
err = -ENOMEM;
dev_err(client->dev, "failed to request syncpoint: %d\n", err);
goto put;
}
err = host1x_client_iommu_attach(client);
if (err < 0) {
dev_err(client->dev, "failed to attach to domain: %d\n", err);
goto free;
}
pm_runtime_enable(client->dev);
pm_runtime_use_autosuspend(client->dev);
pm_runtime_set_autosuspend_delay(client->dev, 200);
err = tegra_drm_register_client(dev->dev_private, drm);
if (err < 0) {
dev_err(client->dev, "failed to register client: %d\n", err);
goto disable_rpm;
}
return 0;
disable_rpm:
pm_runtime_dont_use_autosuspend(client->dev);
pm_runtime_force_suspend(client->dev);
host1x_client_iommu_detach(client);
free:
host1x_syncpt_put(client->syncpts[0]);
put:
host1x_channel_put(gr3d->channel);
return err;
}
static int gr3d_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 gr3d *gr3d = to_gr3d(drm);
int err;
err = tegra_drm_unregister_client(dev->dev_private, drm);
if (err < 0)
return err;
pm_runtime_dont_use_autosuspend(client->dev);
pm_runtime_force_suspend(client->dev);
host1x_client_iommu_detach(client);
host1x_syncpt_put(client->syncpts[0]);
host1x_channel_put(gr3d->channel);
gr3d->channel = NULL;
return 0;
}
static const struct host1x_client_ops gr3d_client_ops = {
.init = gr3d_init,
.exit = gr3d_exit,
};
static int gr3d_open_channel(struct tegra_drm_client *client,
struct tegra_drm_context *context)
{
struct gr3d *gr3d = to_gr3d(client);
context->channel = host1x_channel_get(gr3d->channel);
if (!context->channel)
return -ENOMEM;
return 0;
}
static void gr3d_close_channel(struct tegra_drm_context *context)
{
host1x_channel_put(context->channel);
}
static int gr3d_is_addr_reg(struct device *dev, u32 class, u32 offset)
{
struct gr3d *gr3d = dev_get_drvdata(dev);
switch (class) {
case HOST1X_CLASS_HOST1X:
if (offset == 0x2b)
return 1;
break;
case HOST1X_CLASS_GR3D:
if (offset >= GR3D_NUM_REGS)
break;
if (test_bit(offset, gr3d->addr_regs))
return 1;
break;
}
return 0;
}
static const struct tegra_drm_client_ops gr3d_ops = {
.open_channel = gr3d_open_channel,
.close_channel = gr3d_close_channel,
.is_addr_reg = gr3d_is_addr_reg,
.submit = tegra_drm_submit,
};
static const struct gr3d_soc tegra20_gr3d_soc = {
.version = 0x20,
.num_clocks = 1,
.num_resets = 2,
};
static const struct gr3d_soc tegra30_gr3d_soc = {
.version = 0x30,
.num_clocks = 2,
.num_resets = 4,
};
static const struct gr3d_soc tegra114_gr3d_soc = {
.version = 0x35,
.num_clocks = 1,
.num_resets = 2,
};
static const struct of_device_id tegra_gr3d_match[] = {
{ .compatible = "nvidia,tegra114-gr3d", .data = &tegra114_gr3d_soc },
{ .compatible = "nvidia,tegra30-gr3d", .data = &tegra30_gr3d_soc },
{ .compatible = "nvidia,tegra20-gr3d", .data = &tegra20_gr3d_soc },
{ }
};
MODULE_DEVICE_TABLE(of, tegra_gr3d_match);
static const u32 gr3d_addr_regs[] = {
GR3D_IDX_ATTRIBUTE( 0),
GR3D_IDX_ATTRIBUTE( 1),
GR3D_IDX_ATTRIBUTE( 2),
GR3D_IDX_ATTRIBUTE( 3),
GR3D_IDX_ATTRIBUTE( 4),
GR3D_IDX_ATTRIBUTE( 5),
GR3D_IDX_ATTRIBUTE( 6),
GR3D_IDX_ATTRIBUTE( 7),
GR3D_IDX_ATTRIBUTE( 8),
GR3D_IDX_ATTRIBUTE( 9),
GR3D_IDX_ATTRIBUTE(10),
GR3D_IDX_ATTRIBUTE(11),
GR3D_IDX_ATTRIBUTE(12),
GR3D_IDX_ATTRIBUTE(13),
GR3D_IDX_ATTRIBUTE(14),
GR3D_IDX_ATTRIBUTE(15),
GR3D_IDX_INDEX_BASE,
GR3D_QR_ZTAG_ADDR,
GR3D_QR_CTAG_ADDR,
GR3D_QR_CZ_ADDR,
GR3D_TEX_TEX_ADDR( 0),
GR3D_TEX_TEX_ADDR( 1),
GR3D_TEX_TEX_ADDR( 2),
GR3D_TEX_TEX_ADDR( 3),
GR3D_TEX_TEX_ADDR( 4),
GR3D_TEX_TEX_ADDR( 5),
GR3D_TEX_TEX_ADDR( 6),
GR3D_TEX_TEX_ADDR( 7),
GR3D_TEX_TEX_ADDR( 8),
GR3D_TEX_TEX_ADDR( 9),
GR3D_TEX_TEX_ADDR(10),
GR3D_TEX_TEX_ADDR(11),
GR3D_TEX_TEX_ADDR(12),
GR3D_TEX_TEX_ADDR(13),
GR3D_TEX_TEX_ADDR(14),
GR3D_TEX_TEX_ADDR(15),
GR3D_DW_MEMORY_OUTPUT_ADDRESS,
GR3D_GLOBAL_SURFADDR( 0),
GR3D_GLOBAL_SURFADDR( 1),
GR3D_GLOBAL_SURFADDR( 2),
GR3D_GLOBAL_SURFADDR( 3),
GR3D_GLOBAL_SURFADDR( 4),
GR3D_GLOBAL_SURFADDR( 5),
GR3D_GLOBAL_SURFADDR( 6),
GR3D_GLOBAL_SURFADDR( 7),
GR3D_GLOBAL_SURFADDR( 8),
GR3D_GLOBAL_SURFADDR( 9),
GR3D_GLOBAL_SURFADDR(10),
GR3D_GLOBAL_SURFADDR(11),
GR3D_GLOBAL_SURFADDR(12),
GR3D_GLOBAL_SURFADDR(13),
GR3D_GLOBAL_SURFADDR(14),
GR3D_GLOBAL_SURFADDR(15),
GR3D_GLOBAL_SPILLSURFADDR,
GR3D_GLOBAL_SURFOVERADDR( 0),
GR3D_GLOBAL_SURFOVERADDR( 1),
GR3D_GLOBAL_SURFOVERADDR( 2),
GR3D_GLOBAL_SURFOVERADDR( 3),
GR3D_GLOBAL_SURFOVERADDR( 4),
GR3D_GLOBAL_SURFOVERADDR( 5),
GR3D_GLOBAL_SURFOVERADDR( 6),
GR3D_GLOBAL_SURFOVERADDR( 7),
GR3D_GLOBAL_SURFOVERADDR( 8),
GR3D_GLOBAL_SURFOVERADDR( 9),
GR3D_GLOBAL_SURFOVERADDR(10),
GR3D_GLOBAL_SURFOVERADDR(11),
GR3D_GLOBAL_SURFOVERADDR(12),
GR3D_GLOBAL_SURFOVERADDR(13),
GR3D_GLOBAL_SURFOVERADDR(14),
GR3D_GLOBAL_SURFOVERADDR(15),
GR3D_GLOBAL_SAMP01SURFADDR( 0),
GR3D_GLOBAL_SAMP01SURFADDR( 1),
GR3D_GLOBAL_SAMP01SURFADDR( 2),
GR3D_GLOBAL_SAMP01SURFADDR( 3),
GR3D_GLOBAL_SAMP01SURFADDR( 4),
GR3D_GLOBAL_SAMP01SURFADDR( 5),
GR3D_GLOBAL_SAMP01SURFADDR( 6),
GR3D_GLOBAL_SAMP01SURFADDR( 7),
GR3D_GLOBAL_SAMP01SURFADDR( 8),
GR3D_GLOBAL_SAMP01SURFADDR( 9),
GR3D_GLOBAL_SAMP01SURFADDR(10),
GR3D_GLOBAL_SAMP01SURFADDR(11),
GR3D_GLOBAL_SAMP01SURFADDR(12),
GR3D_GLOBAL_SAMP01SURFADDR(13),
GR3D_GLOBAL_SAMP01SURFADDR(14),
GR3D_GLOBAL_SAMP01SURFADDR(15),
GR3D_GLOBAL_SAMP23SURFADDR( 0),
GR3D_GLOBAL_SAMP23SURFADDR( 1),
GR3D_GLOBAL_SAMP23SURFADDR( 2),
GR3D_GLOBAL_SAMP23SURFADDR( 3),
GR3D_GLOBAL_SAMP23SURFADDR( 4),
GR3D_GLOBAL_SAMP23SURFADDR( 5),
GR3D_GLOBAL_SAMP23SURFADDR( 6),
GR3D_GLOBAL_SAMP23SURFADDR( 7),
GR3D_GLOBAL_SAMP23SURFADDR( 8),
GR3D_GLOBAL_SAMP23SURFADDR( 9),
GR3D_GLOBAL_SAMP23SURFADDR(10),
GR3D_GLOBAL_SAMP23SURFADDR(11),
GR3D_GLOBAL_SAMP23SURFADDR(12),
GR3D_GLOBAL_SAMP23SURFADDR(13),
GR3D_GLOBAL_SAMP23SURFADDR(14),
GR3D_GLOBAL_SAMP23SURFADDR(15),
};
static int gr3d_power_up_legacy_domain(struct device *dev, const char *name,
unsigned int id)
{
struct gr3d *gr3d = dev_get_drvdata(dev);
struct reset_control *reset;
struct clk *clk;
unsigned int i;
int err;
/*
* Tegra20 device-tree doesn't specify 3d clock name and there is only
* one clock for Tegra20. Tegra30+ device-trees always specified names
* for the clocks.
*/
if (gr3d->nclocks == 1) {
if (id == TEGRA_POWERGATE_3D1)
return 0;
clk = gr3d->clocks[0].clk;
} else {
for (i = 0; i < gr3d->nclocks; i++) {
if (WARN_ON(!gr3d->clocks[i].id))
continue;
if (!strcmp(gr3d->clocks[i].id, name)) {
clk = gr3d->clocks[i].clk;
break;
}
}
if (WARN_ON(i == gr3d->nclocks))
return -EINVAL;
}
/*
* We use array of resets, which includes MC resets, and MC
* reset shouldn't be asserted while hardware is gated because
* MC flushing will fail for gated hardware. Hence for legacy
* PD we request the individual reset separately.
*/
reset = reset_control_get_exclusive_released(dev, name);
if (IS_ERR(reset))
return PTR_ERR(reset);
err = reset_control_acquire(reset);
if (err) {
dev_err(dev, "failed to acquire %s reset: %d\n", name, err);
} else {
err = tegra_powergate_sequence_power_up(id, clk, reset);
reset_control_release(reset);
}
reset_control_put(reset);
if (err)
return err;
/*
* tegra_powergate_sequence_power_up() leaves clocks enabled,
* while GENPD not. Hence keep clock-enable balanced.
*/
clk_disable_unprepare(clk);
return 0;
}
static void gr3d_del_link(void *link)
{
device_link_del(link);
}
static int gr3d_init_power(struct device *dev, struct gr3d *gr3d)
{
static const char * const opp_genpd_names[] = { "3d0", "3d1", NULL };
const u32 link_flags = DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME;
struct device **opp_virt_devs, *pd_dev;
struct device_link *link;
unsigned int i;
int err;
err = of_count_phandle_with_args(dev->of_node, "power-domains",
"#power-domain-cells");
if (err < 0) {
if (err != -ENOENT)
return err;
/*
* Older device-trees don't use GENPD. In this case we should
* toggle power domain manually.
*/
err = gr3d_power_up_legacy_domain(dev, "3d",
TEGRA_POWERGATE_3D);
if (err)
return err;
err = gr3d_power_up_legacy_domain(dev, "3d2",
TEGRA_POWERGATE_3D1);
if (err)
return err;
return 0;
}
/*
* The PM domain core automatically attaches a single power domain,
* otherwise it skips attaching completely. We have a single domain
* on Tegra20 and two domains on Tegra30+.
*/
if (dev->pm_domain)
return 0;
err = devm_pm_opp_attach_genpd(dev, opp_genpd_names, &opp_virt_devs);
if (err)
return err;
for (i = 0; opp_genpd_names[i]; i++) {
pd_dev = opp_virt_devs[i];
if (!pd_dev) {
dev_err(dev, "failed to get %s power domain\n",
opp_genpd_names[i]);
return -EINVAL;
}
link = device_link_add(dev, pd_dev, link_flags);
if (!link) {
dev_err(dev, "failed to link to %s\n", dev_name(pd_dev));
return -EINVAL;
}
err = devm_add_action_or_reset(dev, gr3d_del_link, link);
if (err)
return err;
}
return 0;
}
static int gr3d_get_clocks(struct device *dev, struct gr3d *gr3d)
{
int err;
err = devm_clk_bulk_get_all(dev, &gr3d->clocks);
if (err < 0) {
dev_err(dev, "failed to get clock: %d\n", err);
return err;
}
gr3d->nclocks = err;
if (gr3d->nclocks != gr3d->soc->num_clocks) {
dev_err(dev, "invalid number of clocks: %u\n", gr3d->nclocks);
return -ENOENT;
}
return 0;
}
static int gr3d_get_resets(struct device *dev, struct gr3d *gr3d)
{
int err;
gr3d->resets[RST_MC].id = "mc";
gr3d->resets[RST_MC2].id = "mc2";
gr3d->resets[RST_GR3D].id = "3d";
gr3d->resets[RST_GR3D2].id = "3d2";
gr3d->nresets = gr3d->soc->num_resets;
err = devm_reset_control_bulk_get_optional_exclusive_released(
dev, gr3d->nresets, gr3d->resets);
if (err) {
dev_err(dev, "failed to get reset: %d\n", err);
return err;
}
if (WARN_ON(!gr3d->resets[RST_GR3D].rstc) ||
WARN_ON(!gr3d->resets[RST_GR3D2].rstc && gr3d->nresets == 4))
return -ENOENT;
return 0;
}
static int gr3d_probe(struct platform_device *pdev)
{
struct host1x_syncpt **syncpts;
struct gr3d *gr3d;
unsigned int i;
int err;
gr3d = devm_kzalloc(&pdev->dev, sizeof(*gr3d), GFP_KERNEL);
if (!gr3d)
return -ENOMEM;
platform_set_drvdata(pdev, gr3d);
gr3d->soc = of_device_get_match_data(&pdev->dev);
syncpts = devm_kzalloc(&pdev->dev, sizeof(*syncpts), GFP_KERNEL);
if (!syncpts)
return -ENOMEM;
err = gr3d_get_clocks(&pdev->dev, gr3d);
if (err)
return err;
err = gr3d_get_resets(&pdev->dev, gr3d);
if (err)
return err;
err = gr3d_init_power(&pdev->dev, gr3d);
if (err)
return err;
INIT_LIST_HEAD(&gr3d->client.base.list);
gr3d->client.base.ops = &gr3d_client_ops;
gr3d->client.base.dev = &pdev->dev;
gr3d->client.base.class = HOST1X_CLASS_GR3D;
gr3d->client.base.syncpts = syncpts;
gr3d->client.base.num_syncpts = 1;
INIT_LIST_HEAD(&gr3d->client.list);
gr3d->client.version = gr3d->soc->version;
gr3d->client.ops = &gr3d_ops;
err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
if (err)
return err;
err = host1x_client_register(&gr3d->client.base);
if (err < 0) {
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
err);
return err;
}
/* initialize address register map */
for (i = 0; i < ARRAY_SIZE(gr3d_addr_regs); i++)
set_bit(gr3d_addr_regs[i], gr3d->addr_regs);
return 0;
}
static int gr3d_remove(struct platform_device *pdev)
{
struct gr3d *gr3d = platform_get_drvdata(pdev);
int err;
err = host1x_client_unregister(&gr3d->client.base);
if (err < 0) {
dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
err);
return err;
}
return 0;
}
static int __maybe_unused gr3d_runtime_suspend(struct device *dev)
{
struct gr3d *gr3d = dev_get_drvdata(dev);
int err;
host1x_channel_stop(gr3d->channel);
err = reset_control_bulk_assert(gr3d->nresets, gr3d->resets);
if (err) {
dev_err(dev, "failed to assert reset: %d\n", err);
return err;
}
usleep_range(10, 20);
/*
* Older device-trees don't specify MC resets and power-gating can't
* be done safely in that case. Hence we will keep the power ungated
* for older DTBs. For newer DTBs, GENPD will perform the power-gating.
*/
clk_bulk_disable_unprepare(gr3d->nclocks, gr3d->clocks);
reset_control_bulk_release(gr3d->nresets, gr3d->resets);
return 0;
}
static int __maybe_unused gr3d_runtime_resume(struct device *dev)
{
struct gr3d *gr3d = dev_get_drvdata(dev);
int err;
err = reset_control_bulk_acquire(gr3d->nresets, gr3d->resets);
if (err) {
dev_err(dev, "failed to acquire reset: %d\n", err);
return err;
}
err = clk_bulk_prepare_enable(gr3d->nclocks, gr3d->clocks);
if (err) {
dev_err(dev, "failed to enable clock: %d\n", err);
goto release_reset;
}
err = reset_control_bulk_deassert(gr3d->nresets, gr3d->resets);
if (err) {
dev_err(dev, "failed to deassert reset: %d\n", err);
goto disable_clk;
}
return 0;
disable_clk:
clk_bulk_disable_unprepare(gr3d->nclocks, gr3d->clocks);
release_reset:
reset_control_bulk_release(gr3d->nresets, gr3d->resets);
return err;
}
static const struct dev_pm_ops tegra_gr3d_pm = {
SET_RUNTIME_PM_OPS(gr3d_runtime_suspend, gr3d_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
struct platform_driver tegra_gr3d_driver = {
.driver = {
.name = "tegra-gr3d",
.of_match_table = tegra_gr3d_match,
.pm = &tegra_gr3d_pm,
},
.probe = gr3d_probe,
.remove = gr3d_remove,
};