linux/drivers/gpu/drm/lima/lima_device.c
Qiang Yu 63945d5149 drm/lima: add pm resume/suspend ops
Add driver pm system and runtime hardware resume/suspend ops.
Note this won't enable runtime pm of the device yet.

v2:
Do clock and power gating when suspend/resume.

Tested-by: Bhushan Shah <bshah@kde.org>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200421133551.31481-10-yuq825@gmail.com
2020-04-24 20:51:19 +08:00

534 lines
12 KiB
C

// SPDX-License-Identifier: GPL-2.0 OR MIT
/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include "lima_device.h"
#include "lima_gp.h"
#include "lima_pp.h"
#include "lima_mmu.h"
#include "lima_pmu.h"
#include "lima_l2_cache.h"
#include "lima_dlbu.h"
#include "lima_bcast.h"
#include "lima_vm.h"
struct lima_ip_desc {
char *name;
char *irq_name;
bool must_have[lima_gpu_num];
int offset[lima_gpu_num];
int (*init)(struct lima_ip *ip);
void (*fini)(struct lima_ip *ip);
int (*resume)(struct lima_ip *ip);
void (*suspend)(struct lima_ip *ip);
};
#define LIMA_IP_DESC(ipname, mst0, mst1, off0, off1, func, irq) \
[lima_ip_##ipname] = { \
.name = #ipname, \
.irq_name = irq, \
.must_have = { \
[lima_gpu_mali400] = mst0, \
[lima_gpu_mali450] = mst1, \
}, \
.offset = { \
[lima_gpu_mali400] = off0, \
[lima_gpu_mali450] = off1, \
}, \
.init = lima_##func##_init, \
.fini = lima_##func##_fini, \
.resume = lima_##func##_resume, \
.suspend = lima_##func##_suspend, \
}
static struct lima_ip_desc lima_ip_desc[lima_ip_num] = {
LIMA_IP_DESC(pmu, false, false, 0x02000, 0x02000, pmu, "pmu"),
LIMA_IP_DESC(l2_cache0, true, true, 0x01000, 0x10000, l2_cache, NULL),
LIMA_IP_DESC(l2_cache1, false, true, -1, 0x01000, l2_cache, NULL),
LIMA_IP_DESC(l2_cache2, false, false, -1, 0x11000, l2_cache, NULL),
LIMA_IP_DESC(gp, true, true, 0x00000, 0x00000, gp, "gp"),
LIMA_IP_DESC(pp0, true, true, 0x08000, 0x08000, pp, "pp0"),
LIMA_IP_DESC(pp1, false, false, 0x0A000, 0x0A000, pp, "pp1"),
LIMA_IP_DESC(pp2, false, false, 0x0C000, 0x0C000, pp, "pp2"),
LIMA_IP_DESC(pp3, false, false, 0x0E000, 0x0E000, pp, "pp3"),
LIMA_IP_DESC(pp4, false, false, -1, 0x28000, pp, "pp4"),
LIMA_IP_DESC(pp5, false, false, -1, 0x2A000, pp, "pp5"),
LIMA_IP_DESC(pp6, false, false, -1, 0x2C000, pp, "pp6"),
LIMA_IP_DESC(pp7, false, false, -1, 0x2E000, pp, "pp7"),
LIMA_IP_DESC(gpmmu, true, true, 0x03000, 0x03000, mmu, "gpmmu"),
LIMA_IP_DESC(ppmmu0, true, true, 0x04000, 0x04000, mmu, "ppmmu0"),
LIMA_IP_DESC(ppmmu1, false, false, 0x05000, 0x05000, mmu, "ppmmu1"),
LIMA_IP_DESC(ppmmu2, false, false, 0x06000, 0x06000, mmu, "ppmmu2"),
LIMA_IP_DESC(ppmmu3, false, false, 0x07000, 0x07000, mmu, "ppmmu3"),
LIMA_IP_DESC(ppmmu4, false, false, -1, 0x1C000, mmu, "ppmmu4"),
LIMA_IP_DESC(ppmmu5, false, false, -1, 0x1D000, mmu, "ppmmu5"),
LIMA_IP_DESC(ppmmu6, false, false, -1, 0x1E000, mmu, "ppmmu6"),
LIMA_IP_DESC(ppmmu7, false, false, -1, 0x1F000, mmu, "ppmmu7"),
LIMA_IP_DESC(dlbu, false, true, -1, 0x14000, dlbu, NULL),
LIMA_IP_DESC(bcast, false, true, -1, 0x13000, bcast, NULL),
LIMA_IP_DESC(pp_bcast, false, true, -1, 0x16000, pp_bcast, "pp"),
LIMA_IP_DESC(ppmmu_bcast, false, true, -1, 0x15000, mmu, NULL),
};
const char *lima_ip_name(struct lima_ip *ip)
{
return lima_ip_desc[ip->id].name;
}
static int lima_clk_enable(struct lima_device *dev)
{
int err;
err = clk_prepare_enable(dev->clk_bus);
if (err)
return err;
err = clk_prepare_enable(dev->clk_gpu);
if (err)
goto error_out0;
if (dev->reset) {
err = reset_control_deassert(dev->reset);
if (err) {
dev_err(dev->dev,
"reset controller deassert failed %d\n", err);
goto error_out1;
}
}
return 0;
error_out1:
clk_disable_unprepare(dev->clk_gpu);
error_out0:
clk_disable_unprepare(dev->clk_bus);
return err;
}
static void lima_clk_disable(struct lima_device *dev)
{
if (dev->reset)
reset_control_assert(dev->reset);
clk_disable_unprepare(dev->clk_gpu);
clk_disable_unprepare(dev->clk_bus);
}
static int lima_clk_init(struct lima_device *dev)
{
int err;
dev->clk_bus = devm_clk_get(dev->dev, "bus");
if (IS_ERR(dev->clk_bus)) {
err = PTR_ERR(dev->clk_bus);
if (err != -EPROBE_DEFER)
dev_err(dev->dev, "get bus clk failed %d\n", err);
dev->clk_bus = NULL;
return err;
}
dev->clk_gpu = devm_clk_get(dev->dev, "core");
if (IS_ERR(dev->clk_gpu)) {
err = PTR_ERR(dev->clk_gpu);
if (err != -EPROBE_DEFER)
dev_err(dev->dev, "get core clk failed %d\n", err);
dev->clk_gpu = NULL;
return err;
}
dev->reset = devm_reset_control_array_get_optional_shared(dev->dev);
if (IS_ERR(dev->reset)) {
err = PTR_ERR(dev->reset);
if (err != -EPROBE_DEFER)
dev_err(dev->dev, "get reset controller failed %d\n",
err);
dev->reset = NULL;
return err;
}
return lima_clk_enable(dev);
}
static void lima_clk_fini(struct lima_device *dev)
{
lima_clk_disable(dev);
}
static int lima_regulator_enable(struct lima_device *dev)
{
int ret;
if (!dev->regulator)
return 0;
ret = regulator_enable(dev->regulator);
if (ret < 0) {
dev_err(dev->dev, "failed to enable regulator: %d\n", ret);
return ret;
}
return 0;
}
static void lima_regulator_disable(struct lima_device *dev)
{
if (dev->regulator)
regulator_disable(dev->regulator);
}
static int lima_regulator_init(struct lima_device *dev)
{
int ret;
dev->regulator = devm_regulator_get_optional(dev->dev, "mali");
if (IS_ERR(dev->regulator)) {
ret = PTR_ERR(dev->regulator);
dev->regulator = NULL;
if (ret == -ENODEV)
return 0;
if (ret != -EPROBE_DEFER)
dev_err(dev->dev, "failed to get regulator: %d\n", ret);
return ret;
}
return lima_regulator_enable(dev);
}
static void lima_regulator_fini(struct lima_device *dev)
{
lima_regulator_disable(dev);
}
static int lima_init_ip(struct lima_device *dev, int index)
{
struct platform_device *pdev = to_platform_device(dev->dev);
struct lima_ip_desc *desc = lima_ip_desc + index;
struct lima_ip *ip = dev->ip + index;
const char *irq_name = desc->irq_name;
int offset = desc->offset[dev->id];
bool must = desc->must_have[dev->id];
int err;
if (offset < 0)
return 0;
ip->dev = dev;
ip->id = index;
ip->iomem = dev->iomem + offset;
if (irq_name) {
err = must ? platform_get_irq_byname(pdev, irq_name) :
platform_get_irq_byname_optional(pdev, irq_name);
if (err < 0)
goto out;
ip->irq = err;
}
err = desc->init(ip);
if (!err) {
ip->present = true;
return 0;
}
out:
return must ? err : 0;
}
static void lima_fini_ip(struct lima_device *ldev, int index)
{
struct lima_ip_desc *desc = lima_ip_desc + index;
struct lima_ip *ip = ldev->ip + index;
if (ip->present)
desc->fini(ip);
}
static int lima_resume_ip(struct lima_device *ldev, int index)
{
struct lima_ip_desc *desc = lima_ip_desc + index;
struct lima_ip *ip = ldev->ip + index;
int ret = 0;
if (ip->present)
ret = desc->resume(ip);
return ret;
}
static void lima_suspend_ip(struct lima_device *ldev, int index)
{
struct lima_ip_desc *desc = lima_ip_desc + index;
struct lima_ip *ip = ldev->ip + index;
if (ip->present)
desc->suspend(ip);
}
static int lima_init_gp_pipe(struct lima_device *dev)
{
struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
int err;
pipe->ldev = dev;
err = lima_sched_pipe_init(pipe, "gp");
if (err)
return err;
pipe->l2_cache[pipe->num_l2_cache++] = dev->ip + lima_ip_l2_cache0;
pipe->mmu[pipe->num_mmu++] = dev->ip + lima_ip_gpmmu;
pipe->processor[pipe->num_processor++] = dev->ip + lima_ip_gp;
err = lima_gp_pipe_init(dev);
if (err) {
lima_sched_pipe_fini(pipe);
return err;
}
return 0;
}
static void lima_fini_gp_pipe(struct lima_device *dev)
{
struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
lima_gp_pipe_fini(dev);
lima_sched_pipe_fini(pipe);
}
static int lima_init_pp_pipe(struct lima_device *dev)
{
struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
int err, i;
pipe->ldev = dev;
err = lima_sched_pipe_init(pipe, "pp");
if (err)
return err;
for (i = 0; i < LIMA_SCHED_PIPE_MAX_PROCESSOR; i++) {
struct lima_ip *pp = dev->ip + lima_ip_pp0 + i;
struct lima_ip *ppmmu = dev->ip + lima_ip_ppmmu0 + i;
struct lima_ip *l2_cache;
if (dev->id == lima_gpu_mali400)
l2_cache = dev->ip + lima_ip_l2_cache0;
else
l2_cache = dev->ip + lima_ip_l2_cache1 + (i >> 2);
if (pp->present && ppmmu->present && l2_cache->present) {
pipe->mmu[pipe->num_mmu++] = ppmmu;
pipe->processor[pipe->num_processor++] = pp;
if (!pipe->l2_cache[i >> 2])
pipe->l2_cache[pipe->num_l2_cache++] = l2_cache;
}
}
if (dev->ip[lima_ip_bcast].present) {
pipe->bcast_processor = dev->ip + lima_ip_pp_bcast;
pipe->bcast_mmu = dev->ip + lima_ip_ppmmu_bcast;
}
err = lima_pp_pipe_init(dev);
if (err) {
lima_sched_pipe_fini(pipe);
return err;
}
return 0;
}
static void lima_fini_pp_pipe(struct lima_device *dev)
{
struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
lima_pp_pipe_fini(dev);
lima_sched_pipe_fini(pipe);
}
int lima_device_init(struct lima_device *ldev)
{
struct platform_device *pdev = to_platform_device(ldev->dev);
int err, i;
dma_set_coherent_mask(ldev->dev, DMA_BIT_MASK(32));
err = lima_clk_init(ldev);
if (err)
return err;
err = lima_regulator_init(ldev);
if (err)
goto err_out0;
ldev->empty_vm = lima_vm_create(ldev);
if (!ldev->empty_vm) {
err = -ENOMEM;
goto err_out1;
}
ldev->va_start = 0;
if (ldev->id == lima_gpu_mali450) {
ldev->va_end = LIMA_VA_RESERVE_START;
ldev->dlbu_cpu = dma_alloc_wc(
ldev->dev, LIMA_PAGE_SIZE,
&ldev->dlbu_dma, GFP_KERNEL | __GFP_NOWARN);
if (!ldev->dlbu_cpu) {
err = -ENOMEM;
goto err_out2;
}
} else
ldev->va_end = LIMA_VA_RESERVE_END;
ldev->iomem = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ldev->iomem)) {
dev_err(ldev->dev, "fail to ioremap iomem\n");
err = PTR_ERR(ldev->iomem);
goto err_out3;
}
for (i = 0; i < lima_ip_num; i++) {
err = lima_init_ip(ldev, i);
if (err)
goto err_out4;
}
err = lima_init_gp_pipe(ldev);
if (err)
goto err_out4;
err = lima_init_pp_pipe(ldev);
if (err)
goto err_out5;
ldev->dump.magic = LIMA_DUMP_MAGIC;
ldev->dump.version_major = LIMA_DUMP_MAJOR;
ldev->dump.version_minor = LIMA_DUMP_MINOR;
INIT_LIST_HEAD(&ldev->error_task_list);
mutex_init(&ldev->error_task_list_lock);
dev_info(ldev->dev, "bus rate = %lu\n", clk_get_rate(ldev->clk_bus));
dev_info(ldev->dev, "mod rate = %lu", clk_get_rate(ldev->clk_gpu));
return 0;
err_out5:
lima_fini_gp_pipe(ldev);
err_out4:
while (--i >= 0)
lima_fini_ip(ldev, i);
err_out3:
if (ldev->dlbu_cpu)
dma_free_wc(ldev->dev, LIMA_PAGE_SIZE,
ldev->dlbu_cpu, ldev->dlbu_dma);
err_out2:
lima_vm_put(ldev->empty_vm);
err_out1:
lima_regulator_fini(ldev);
err_out0:
lima_clk_fini(ldev);
return err;
}
void lima_device_fini(struct lima_device *ldev)
{
int i;
struct lima_sched_error_task *et, *tmp;
list_for_each_entry_safe(et, tmp, &ldev->error_task_list, list) {
list_del(&et->list);
kvfree(et);
}
mutex_destroy(&ldev->error_task_list_lock);
lima_fini_pp_pipe(ldev);
lima_fini_gp_pipe(ldev);
for (i = lima_ip_num - 1; i >= 0; i--)
lima_fini_ip(ldev, i);
if (ldev->dlbu_cpu)
dma_free_wc(ldev->dev, LIMA_PAGE_SIZE,
ldev->dlbu_cpu, ldev->dlbu_dma);
lima_vm_put(ldev->empty_vm);
lima_regulator_fini(ldev);
lima_clk_fini(ldev);
}
int lima_device_resume(struct device *dev)
{
struct lima_device *ldev = dev_get_drvdata(dev);
int i, err;
err = lima_clk_enable(ldev);
if (err) {
dev_err(dev, "resume clk fail %d\n", err);
return err;
}
err = lima_regulator_enable(ldev);
if (err) {
dev_err(dev, "resume regulator fail %d\n", err);
goto err_out0;
}
for (i = 0; i < lima_ip_num; i++) {
err = lima_resume_ip(ldev, i);
if (err) {
dev_err(dev, "resume ip %d fail\n", i);
goto err_out1;
}
}
err = lima_devfreq_resume(&ldev->devfreq);
if (err) {
dev_err(dev, "devfreq resume fail\n");
goto err_out1;
}
return 0;
err_out1:
while (--i >= 0)
lima_suspend_ip(ldev, i);
lima_regulator_disable(ldev);
err_out0:
lima_clk_disable(ldev);
return err;
}
int lima_device_suspend(struct device *dev)
{
struct lima_device *ldev = dev_get_drvdata(dev);
int i, err;
/* check any task running */
for (i = 0; i < lima_pipe_num; i++) {
if (atomic_read(&ldev->pipe[i].base.hw_rq_count))
return -EBUSY;
}
err = lima_devfreq_suspend(&ldev->devfreq);
if (err) {
dev_err(dev, "devfreq suspend fail\n");
return err;
}
for (i = lima_ip_num - 1; i >= 0; i--)
lima_suspend_ip(ldev, i);
lima_regulator_disable(ldev);
lima_clk_disable(ldev);
return 0;
}