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// SPDX-License-Identifier: GPL-2.0 OR MIT
/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <drm/lima_drm.h>
#include "lima_device.h"
#include "lima_gp.h"
#include "lima_regs.h"
#define gp_write(reg, data) writel(data, ip->iomem + reg)
#define gp_read(reg) readl(ip->iomem + reg)
static irqreturn_t lima_gp_irq_handler(int irq, void *data)
{
struct lima_ip *ip = data;
struct lima_device *dev = ip->dev;
struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
u32 state = gp_read(LIMA_GP_INT_STAT);
u32 status = gp_read(LIMA_GP_STATUS);
bool done = false;
/* for shared irq case */
if (!state)
return IRQ_NONE;
if (state & LIMA_GP_IRQ_MASK_ERROR) {
dev_err(dev->dev, "gp error irq state=%x status=%x\n",
state, status);
/* mask all interrupts before hard reset */
gp_write(LIMA_GP_INT_MASK, 0);
pipe->error = true;
done = true;
} else {
bool valid = state & (LIMA_GP_IRQ_VS_END_CMD_LST |
LIMA_GP_IRQ_PLBU_END_CMD_LST);
bool active = status & (LIMA_GP_STATUS_VS_ACTIVE |
LIMA_GP_STATUS_PLBU_ACTIVE);
done = valid && !active;
}
gp_write(LIMA_GP_INT_CLEAR, state);
if (done)
lima_sched_pipe_task_done(pipe);
return IRQ_HANDLED;
}
static void lima_gp_soft_reset_async(struct lima_ip *ip)
{
if (ip->data.async_reset)
return;
gp_write(LIMA_GP_INT_MASK, 0);
gp_write(LIMA_GP_INT_CLEAR, LIMA_GP_IRQ_RESET_COMPLETED);
gp_write(LIMA_GP_CMD, LIMA_GP_CMD_SOFT_RESET);
ip->data.async_reset = true;
}
static int lima_gp_soft_reset_async_wait(struct lima_ip *ip)
{
struct lima_device *dev = ip->dev;
int err;
u32 v;
if (!ip->data.async_reset)
return 0;
err = readl_poll_timeout(ip->iomem + LIMA_GP_INT_RAWSTAT, v,
v & LIMA_GP_IRQ_RESET_COMPLETED,
0, 100);
if (err) {
dev_err(dev->dev, "gp soft reset time out\n");
return err;
}
gp_write(LIMA_GP_INT_CLEAR, LIMA_GP_IRQ_MASK_ALL);
gp_write(LIMA_GP_INT_MASK, LIMA_GP_IRQ_MASK_USED);
ip->data.async_reset = false;
return 0;
}
static int lima_gp_task_validate(struct lima_sched_pipe *pipe,
struct lima_sched_task *task)
{
struct drm_lima_gp_frame *frame = task->frame;
u32 *f = frame->frame;
(void)pipe;
if (f[LIMA_GP_VSCL_START_ADDR >> 2] >
f[LIMA_GP_VSCL_END_ADDR >> 2] ||
f[LIMA_GP_PLBUCL_START_ADDR >> 2] >
f[LIMA_GP_PLBUCL_END_ADDR >> 2] ||
f[LIMA_GP_PLBU_ALLOC_START_ADDR >> 2] >
f[LIMA_GP_PLBU_ALLOC_END_ADDR >> 2])
return -EINVAL;
if (f[LIMA_GP_VSCL_START_ADDR >> 2] ==
f[LIMA_GP_VSCL_END_ADDR >> 2] &&
f[LIMA_GP_PLBUCL_START_ADDR >> 2] ==
f[LIMA_GP_PLBUCL_END_ADDR >> 2])
return -EINVAL;
return 0;
}
static void lima_gp_task_run(struct lima_sched_pipe *pipe,
struct lima_sched_task *task)
{
struct lima_ip *ip = pipe->processor[0];
struct drm_lima_gp_frame *frame = task->frame;
u32 *f = frame->frame;
u32 cmd = 0;
int i;
if (f[LIMA_GP_VSCL_START_ADDR >> 2] !=
f[LIMA_GP_VSCL_END_ADDR >> 2])
cmd |= LIMA_GP_CMD_START_VS;
if (f[LIMA_GP_PLBUCL_START_ADDR >> 2] !=
f[LIMA_GP_PLBUCL_END_ADDR >> 2])
cmd |= LIMA_GP_CMD_START_PLBU;
/* before any hw ops, wait last success task async soft reset */
lima_gp_soft_reset_async_wait(ip);
for (i = 0; i < LIMA_GP_FRAME_REG_NUM; i++)
writel(f[i], ip->iomem + LIMA_GP_VSCL_START_ADDR + i * 4);
gp_write(LIMA_GP_CMD, LIMA_GP_CMD_UPDATE_PLBU_ALLOC);
gp_write(LIMA_GP_CMD, cmd);
}
static int lima_gp_hard_reset_poll(struct lima_ip *ip)
{
gp_write(LIMA_GP_PERF_CNT_0_LIMIT, 0xC01A0000);
return gp_read(LIMA_GP_PERF_CNT_0_LIMIT) == 0xC01A0000;
}
static int lima_gp_hard_reset(struct lima_ip *ip)
{
struct lima_device *dev = ip->dev;
int ret;
gp_write(LIMA_GP_PERF_CNT_0_LIMIT, 0xC0FFE000);
gp_write(LIMA_GP_INT_MASK, 0);
gp_write(LIMA_GP_CMD, LIMA_GP_CMD_RESET);
ret = lima_poll_timeout(ip, lima_gp_hard_reset_poll, 10, 100);
if (ret) {
dev_err(dev->dev, "gp hard reset timeout\n");
return ret;
}
gp_write(LIMA_GP_PERF_CNT_0_LIMIT, 0);
gp_write(LIMA_GP_INT_CLEAR, LIMA_GP_IRQ_MASK_ALL);
gp_write(LIMA_GP_INT_MASK, LIMA_GP_IRQ_MASK_USED);
return 0;
}
static void lima_gp_task_fini(struct lima_sched_pipe *pipe)
{
lima_gp_soft_reset_async(pipe->processor[0]);
}
static void lima_gp_task_error(struct lima_sched_pipe *pipe)
{
struct lima_ip *ip = pipe->processor[0];
dev_err(ip->dev->dev, "gp task error int_state=%x status=%x\n",
gp_read(LIMA_GP_INT_STAT), gp_read(LIMA_GP_STATUS));
lima_gp_hard_reset(ip);
}
static void lima_gp_task_mmu_error(struct lima_sched_pipe *pipe)
{
lima_sched_pipe_task_done(pipe);
}
static void lima_gp_print_version(struct lima_ip *ip)
{
u32 version, major, minor;
char *name;
version = gp_read(LIMA_GP_VERSION);
major = (version >> 8) & 0xFF;
minor = version & 0xFF;
switch (version >> 16) {
case 0xA07:
name = "mali200";
break;
case 0xC07:
name = "mali300";
break;
case 0xB07:
name = "mali400";
break;
case 0xD07:
name = "mali450";
break;
default:
name = "unknown";
break;
}
dev_info(ip->dev->dev, "%s - %s version major %d minor %d\n",
lima_ip_name(ip), name, major, minor);
}
static struct kmem_cache *lima_gp_task_slab;
static int lima_gp_task_slab_refcnt;
int lima_gp_init(struct lima_ip *ip)
{
struct lima_device *dev = ip->dev;
int err;
lima_gp_print_version(ip);
ip->data.async_reset = false;
lima_gp_soft_reset_async(ip);
err = lima_gp_soft_reset_async_wait(ip);
if (err)
return err;
err = devm_request_irq(dev->dev, ip->irq, lima_gp_irq_handler,
IRQF_SHARED, lima_ip_name(ip), ip);
if (err) {
dev_err(dev->dev, "gp %s fail to request irq\n",
lima_ip_name(ip));
return err;
}
dev->gp_version = gp_read(LIMA_GP_VERSION);
return 0;
}
void lima_gp_fini(struct lima_ip *ip)
{
}
int lima_gp_pipe_init(struct lima_device *dev)
{
int frame_size = sizeof(struct drm_lima_gp_frame);
struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp;
if (!lima_gp_task_slab) {
lima_gp_task_slab = kmem_cache_create_usercopy(
"lima_gp_task", sizeof(struct lima_sched_task) + frame_size,
0, SLAB_HWCACHE_ALIGN, sizeof(struct lima_sched_task),
frame_size, NULL);
if (!lima_gp_task_slab)
return -ENOMEM;
}
lima_gp_task_slab_refcnt++;
pipe->frame_size = frame_size;
pipe->task_slab = lima_gp_task_slab;
pipe->task_validate = lima_gp_task_validate;
pipe->task_run = lima_gp_task_run;
pipe->task_fini = lima_gp_task_fini;
pipe->task_error = lima_gp_task_error;
pipe->task_mmu_error = lima_gp_task_mmu_error;
return 0;
}
void lima_gp_pipe_fini(struct lima_device *dev)
{
if (!--lima_gp_task_slab_refcnt) {
kmem_cache_destroy(lima_gp_task_slab);
lima_gp_task_slab = NULL;
}
}
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