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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2002,2007-2021, The Linux Foundation. All rights reserved.
* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/slab.h>
#include "adreno.h"
#include "adreno_a5xx.h"
/*
* Add a perfcounter to the per-fd list.
* Call with the device mutex held
*/
static int adreno_process_perfcounter_add(struct kgsl_device_private *dev_priv,
unsigned int groupid, unsigned int countable)
{
struct adreno_device_private *adreno_priv = container_of(dev_priv,
struct adreno_device_private, dev_priv);
struct adreno_perfcounter_list_node *perfctr;
perfctr = kmalloc(sizeof(*perfctr), GFP_KERNEL);
if (!perfctr)
return -ENOMEM;
perfctr->groupid = groupid;
perfctr->countable = countable;
/* add the pair to process perfcounter list */
list_add(&perfctr->node, &adreno_priv->perfcounter_list);
return 0;
}
/*
* Remove a perfcounter from the per-fd list.
* Call with the device mutex held
*/
static int adreno_process_perfcounter_del(struct kgsl_device_private *dev_priv,
unsigned int groupid, unsigned int countable)
{
struct adreno_device_private *adreno_priv = container_of(dev_priv,
struct adreno_device_private, dev_priv);
struct adreno_perfcounter_list_node *p;
list_for_each_entry(p, &adreno_priv->perfcounter_list, node) {
if (p->groupid == groupid && p->countable == countable) {
list_del(&p->node);
kfree(p);
return 0;
}
}
return -ENODEV;
}
long adreno_ioctl_perfcounter_get(struct kgsl_device_private *dev_priv,
unsigned int cmd, void *data)
{
struct kgsl_device *device = dev_priv->device;
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
struct kgsl_perfcounter_get *get = data;
int result;
mutex_lock(&device->mutex);
/*
* adreno_perfcounter_get() is called by kernel clients
* during start(), so it is not safe to take an
* active count inside that function.
*/
result = adreno_perfcntr_active_oob_get(device);
if (result) {
mutex_unlock(&device->mutex);
return (long)result;
}
result = adreno_perfcounter_get(adreno_dev,
get->groupid, get->countable, &get->offset,
&get->offset_hi, PERFCOUNTER_FLAG_NONE);
/* Add the perfcounter into the list */
if (!result) {
result = adreno_process_perfcounter_add(dev_priv, get->groupid,
get->countable);
if (result)
adreno_perfcounter_put(adreno_dev, get->groupid,
get->countable, PERFCOUNTER_FLAG_NONE);
}
adreno_perfcntr_active_oob_put(device);
mutex_unlock(&device->mutex);
return (long) result;
}
long adreno_ioctl_perfcounter_put(struct kgsl_device_private *dev_priv,
unsigned int cmd, void *data)
{
struct kgsl_device *device = dev_priv->device;
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
struct kgsl_perfcounter_put *put = data;
int result;
mutex_lock(&device->mutex);
/* Delete the perfcounter from the process list */
result = adreno_process_perfcounter_del(dev_priv, put->groupid,
put->countable);
/* Put the perfcounter refcount */
if (!result)
adreno_perfcounter_put(adreno_dev, put->groupid,
put->countable, PERFCOUNTER_FLAG_NONE);
mutex_unlock(&device->mutex);
return (long) result;
}
static long adreno_ioctl_perfcounter_query(struct kgsl_device_private *dev_priv,
unsigned int cmd, void *data)
{
struct adreno_device *adreno_dev = ADRENO_DEVICE(dev_priv->device);
struct kgsl_perfcounter_query *query = data;
return (long) adreno_perfcounter_query_group(adreno_dev, query->groupid,
query->countables, query->count, &query->max_counters);
}
static long adreno_ioctl_perfcounter_read(struct kgsl_device_private *dev_priv,
unsigned int cmd, void *data)
{
struct adreno_device *adreno_dev = ADRENO_DEVICE(dev_priv->device);
struct kgsl_perfcounter_read *read = data;
/*
* When performance counter zapping is enabled, the counters are cleared
* across context switches. Reading the counters when they are zapped is
* not permitted.
*/
if (!adreno_dev->perfcounter)
return -EPERM;
return (long) adreno_perfcounter_read_group(adreno_dev, read->reads,
read->count);
}
static long adreno_ioctl_preemption_counters_query(
struct kgsl_device_private *dev_priv,
unsigned int cmd, void *data)
{
struct adreno_device *adreno_dev = ADRENO_DEVICE(dev_priv->device);
struct adreno_gpudev *gpudev = ADRENO_GPU_DEVICE(adreno_dev);
struct kgsl_preemption_counters_query *read = data;
int size_level = A5XX_CP_CTXRECORD_PREEMPTION_COUNTER_SIZE;
int levels_to_copy;
if (!adreno_is_a5xx(adreno_dev) ||
!adreno_is_preemption_enabled(adreno_dev))
return -EOPNOTSUPP;
if (read->size_user < size_level)
return -EINVAL;
/* Calculate number of preemption counter levels to copy to userspace */
levels_to_copy = (read->size_user / size_level);
if (levels_to_copy > gpudev->num_prio_levels)
levels_to_copy = gpudev->num_prio_levels;
if (copy_to_user((void __user *) (uintptr_t) read->counters,
adreno_dev->preempt.scratch.hostptr,
levels_to_copy * size_level))
return -EFAULT;
read->max_priority_level = levels_to_copy;
read->size_priority_level = size_level;
return 0;
}
long adreno_ioctl_helper(struct kgsl_device_private *dev_priv,
unsigned int cmd, unsigned long arg,
const struct kgsl_ioctl *cmds, int len)
{
unsigned char data[128] = { 0 };
long ret;
int i;
for (i = 0; i < len; i++) {
if (_IOC_NR(cmd) == _IOC_NR(cmds[i].cmd))
break;
}
if (i == len)
return -ENOIOCTLCMD;
if (_IOC_SIZE(cmds[i].cmd > sizeof(data))) {
dev_err_ratelimited(dev_priv->device->dev,
"data too big for ioctl 0x%08x: %d/%zu\n",
cmd, _IOC_SIZE(cmds[i].cmd), sizeof(data));
return -EINVAL;
}
if (_IOC_SIZE(cmds[i].cmd)) {
ret = kgsl_ioctl_copy_in(cmds[i].cmd, cmd, arg, data);
if (ret)
return ret;
} else {
memset(data, 0, sizeof(data));
}
ret = cmds[i].func(dev_priv, cmd, data);
if (ret == 0 && _IOC_SIZE(cmds[i].cmd))
ret = kgsl_ioctl_copy_out(cmds[i].cmd, cmd, arg, data);
return ret;
}
static struct kgsl_ioctl adreno_ioctl_funcs[] = {
{ IOCTL_KGSL_PERFCOUNTER_GET, adreno_ioctl_perfcounter_get },
{ IOCTL_KGSL_PERFCOUNTER_PUT, adreno_ioctl_perfcounter_put },
{ IOCTL_KGSL_PERFCOUNTER_QUERY, adreno_ioctl_perfcounter_query },
{ IOCTL_KGSL_PERFCOUNTER_READ, adreno_ioctl_perfcounter_read },
{ IOCTL_KGSL_PREEMPTIONCOUNTER_QUERY,
adreno_ioctl_preemption_counters_query },
};
long adreno_ioctl(struct kgsl_device_private *dev_priv,
unsigned int cmd, unsigned long arg)
{
return adreno_ioctl_helper(dev_priv, cmd, arg,
adreno_ioctl_funcs, ARRAY_SIZE(adreno_ioctl_funcs));
}
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