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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2016-2019 HabanaLabs, Ltd.
* All Rights Reserved.
*/
#include <uapi/misc/habanalabs.h>
#include "habanalabs.h"
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
static u32 hl_debug_struct_size[HL_DEBUG_OP_TIMESTAMP + 1] = {
[HL_DEBUG_OP_ETR] = sizeof(struct hl_debug_params_etr),
[HL_DEBUG_OP_ETF] = sizeof(struct hl_debug_params_etf),
[HL_DEBUG_OP_STM] = sizeof(struct hl_debug_params_stm),
[HL_DEBUG_OP_FUNNEL] = 0,
[HL_DEBUG_OP_BMON] = sizeof(struct hl_debug_params_bmon),
[HL_DEBUG_OP_SPMU] = sizeof(struct hl_debug_params_spmu),
[HL_DEBUG_OP_TIMESTAMP] = 0
};
static int device_status_info(struct hl_device *hdev, struct hl_info_args *args)
{
struct hl_info_device_status dev_stat = {0};
u32 size = args->return_size;
void __user *out = (void __user *) (uintptr_t) args->return_pointer;
if ((!size) || (!out))
return -EINVAL;
dev_stat.status = hl_device_status(hdev);
return copy_to_user(out, &dev_stat,
min((size_t)size, sizeof(dev_stat))) ? -EFAULT : 0;
}
static int hw_ip_info(struct hl_device *hdev, struct hl_info_args *args)
{
struct hl_info_hw_ip_info hw_ip = {0};
u32 size = args->return_size;
void __user *out = (void __user *) (uintptr_t) args->return_pointer;
struct asic_fixed_properties *prop = &hdev->asic_prop;
u64 sram_kmd_size, dram_kmd_size;
if ((!size) || (!out))
return -EINVAL;
sram_kmd_size = (prop->sram_user_base_address -
prop->sram_base_address);
dram_kmd_size = (prop->dram_user_base_address -
prop->dram_base_address);
hw_ip.device_id = hdev->asic_funcs->get_pci_id(hdev);
hw_ip.sram_base_address = prop->sram_user_base_address;
hw_ip.dram_base_address = prop->dram_user_base_address;
hw_ip.tpc_enabled_mask = prop->tpc_enabled_mask;
hw_ip.sram_size = prop->sram_size - sram_kmd_size;
hw_ip.dram_size = prop->dram_size - dram_kmd_size;
if (hw_ip.dram_size > 0)
hw_ip.dram_enabled = 1;
hw_ip.num_of_events = prop->num_of_events;
memcpy(hw_ip.armcp_version,
prop->armcp_info.armcp_version, VERSION_MAX_LEN);
hw_ip.armcp_cpld_version = __le32_to_cpu(prop->armcp_info.cpld_version);
hw_ip.psoc_pci_pll_nr = prop->psoc_pci_pll_nr;
hw_ip.psoc_pci_pll_nf = prop->psoc_pci_pll_nf;
hw_ip.psoc_pci_pll_od = prop->psoc_pci_pll_od;
hw_ip.psoc_pci_pll_div_factor = prop->psoc_pci_pll_div_factor;
return copy_to_user(out, &hw_ip,
min((size_t)size, sizeof(hw_ip))) ? -EFAULT : 0;
}
static int hw_events_info(struct hl_device *hdev, struct hl_info_args *args)
{
u32 size, max_size = args->return_size;
void __user *out = (void __user *) (uintptr_t) args->return_pointer;
void *arr;
if ((!max_size) || (!out))
return -EINVAL;
arr = hdev->asic_funcs->get_events_stat(hdev, &size);
return copy_to_user(out, arr, min(max_size, size)) ? -EFAULT : 0;
}
static int dram_usage_info(struct hl_device *hdev, struct hl_info_args *args)
{
struct hl_info_dram_usage dram_usage = {0};
u32 max_size = args->return_size;
void __user *out = (void __user *) (uintptr_t) args->return_pointer;
struct asic_fixed_properties *prop = &hdev->asic_prop;
u64 dram_kmd_size;
if ((!max_size) || (!out))
return -EINVAL;
dram_kmd_size = (prop->dram_user_base_address -
prop->dram_base_address);
dram_usage.dram_free_mem = (prop->dram_size - dram_kmd_size) -
atomic64_read(&hdev->dram_used_mem);
dram_usage.ctx_dram_mem = atomic64_read(&hdev->user_ctx->dram_phys_mem);
return copy_to_user(out, &dram_usage,
min((size_t) max_size, sizeof(dram_usage))) ? -EFAULT : 0;
}
static int hw_idle(struct hl_device *hdev, struct hl_info_args *args)
{
struct hl_info_hw_idle hw_idle = {0};
u32 max_size = args->return_size;
void __user *out = (void __user *) (uintptr_t) args->return_pointer;
if ((!max_size) || (!out))
return -EINVAL;
hw_idle.is_idle = hdev->asic_funcs->is_device_idle(hdev, NULL, 0);
return copy_to_user(out, &hw_idle,
min((size_t) max_size, sizeof(hw_idle))) ? -EFAULT : 0;
}
static int debug_coresight(struct hl_device *hdev, struct hl_debug_args *args)
{
struct hl_debug_params *params;
void *input = NULL, *output = NULL;
int rc;
params = kzalloc(sizeof(*params), GFP_KERNEL);
if (!params)
return -ENOMEM;
params->reg_idx = args->reg_idx;
params->enable = args->enable;
params->op = args->op;
if (args->input_ptr && args->input_size) {
input = memdup_user((const void __user *) args->input_ptr,
args->input_size);
if (IS_ERR(input)) {
rc = PTR_ERR(input);
input = NULL;
dev_err(hdev->dev,
"error %d when copying input debug data\n", rc);
goto out;
}
params->input = input;
}
if (args->output_ptr && args->output_size) {
output = kzalloc(args->output_size, GFP_KERNEL);
if (!output) {
rc = -ENOMEM;
goto out;
}
params->output = output;
params->output_size = args->output_size;
}
rc = hdev->asic_funcs->debug_coresight(hdev, params);
if (rc) {
dev_err(hdev->dev,
"debug coresight operation failed %d\n", rc);
goto out;
}
if (output) {
if (copy_to_user((void __user *) (uintptr_t) args->output_ptr,
output,
args->output_size)) {
dev_err(hdev->dev,
"copy to user failed in debug ioctl\n");
rc = -EFAULT;
goto out;
}
}
out:
kfree(params);
kfree(output);
kfree(input);
return rc;
}
static int hl_info_ioctl(struct hl_fpriv *hpriv, void *data)
{
struct hl_info_args *args = data;
struct hl_device *hdev = hpriv->hdev;
int rc;
/* We want to return device status even if it disabled or in reset */
if (args->op == HL_INFO_DEVICE_STATUS)
return device_status_info(hdev, args);
if (hl_device_disabled_or_in_reset(hdev)) {
dev_warn_ratelimited(hdev->dev,
"Device is %s. Can't execute INFO IOCTL\n",
atomic_read(&hdev->in_reset) ? "in_reset" : "disabled");
return -EBUSY;
}
switch (args->op) {
case HL_INFO_HW_IP_INFO:
rc = hw_ip_info(hdev, args);
break;
case HL_INFO_HW_EVENTS:
rc = hw_events_info(hdev, args);
break;
case HL_INFO_DRAM_USAGE:
rc = dram_usage_info(hdev, args);
break;
case HL_INFO_HW_IDLE:
rc = hw_idle(hdev, args);
break;
default:
dev_err(hdev->dev, "Invalid request %d\n", args->op);
rc = -ENOTTY;
break;
}
return rc;
}
static int hl_debug_ioctl(struct hl_fpriv *hpriv, void *data)
{
struct hl_debug_args *args = data;
struct hl_device *hdev = hpriv->hdev;
int rc = 0;
if (hl_device_disabled_or_in_reset(hdev)) {
dev_warn_ratelimited(hdev->dev,
"Device is %s. Can't execute DEBUG IOCTL\n",
atomic_read(&hdev->in_reset) ? "in_reset" : "disabled");
return -EBUSY;
}
switch (args->op) {
case HL_DEBUG_OP_ETR:
case HL_DEBUG_OP_ETF:
case HL_DEBUG_OP_STM:
case HL_DEBUG_OP_FUNNEL:
case HL_DEBUG_OP_BMON:
case HL_DEBUG_OP_SPMU:
case HL_DEBUG_OP_TIMESTAMP:
args->input_size =
min(args->input_size, hl_debug_struct_size[args->op]);
rc = debug_coresight(hdev, args);
break;
default:
dev_err(hdev->dev, "Invalid request %d\n", args->op);
rc = -ENOTTY;
break;
}
return rc;
}
#define HL_IOCTL_DEF(ioctl, _func) \
[_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func}
static const struct hl_ioctl_desc hl_ioctls[] = {
HL_IOCTL_DEF(HL_IOCTL_INFO, hl_info_ioctl),
HL_IOCTL_DEF(HL_IOCTL_CB, hl_cb_ioctl),
HL_IOCTL_DEF(HL_IOCTL_CS, hl_cs_ioctl),
HL_IOCTL_DEF(HL_IOCTL_WAIT_CS, hl_cs_wait_ioctl),
HL_IOCTL_DEF(HL_IOCTL_MEMORY, hl_mem_ioctl),
HL_IOCTL_DEF(HL_IOCTL_DEBUG, hl_debug_ioctl)
};
#define HL_CORE_IOCTL_COUNT ARRAY_SIZE(hl_ioctls)
long hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
struct hl_fpriv *hpriv = filep->private_data;
struct hl_device *hdev = hpriv->hdev;
hl_ioctl_t *func;
const struct hl_ioctl_desc *ioctl = NULL;
unsigned int nr = _IOC_NR(cmd);
char stack_kdata[128] = {0};
char *kdata = NULL;
unsigned int usize, asize;
int retcode;
if (hdev->hard_reset_pending) {
dev_crit_ratelimited(hdev->dev,
"Device HARD reset pending! Please close FD\n");
return -ENODEV;
}
if ((nr >= HL_COMMAND_START) && (nr < HL_COMMAND_END)) {
u32 hl_size;
ioctl = &hl_ioctls[nr];
hl_size = _IOC_SIZE(ioctl->cmd);
usize = asize = _IOC_SIZE(cmd);
if (hl_size > asize)
asize = hl_size;
cmd = ioctl->cmd;
} else {
dev_err(hdev->dev, "invalid ioctl: pid=%d, nr=0x%02x\n",
task_pid_nr(current), nr);
return -ENOTTY;
}
/* Do not trust userspace, use our own definition */
func = ioctl->func;
if (unlikely(!func)) {
dev_dbg(hdev->dev, "no function\n");
retcode = -ENOTTY;
goto out_err;
}
if (cmd & (IOC_IN | IOC_OUT)) {
if (asize <= sizeof(stack_kdata)) {
kdata = stack_kdata;
} else {
kdata = kzalloc(asize, GFP_KERNEL);
if (!kdata) {
retcode = -ENOMEM;
goto out_err;
}
}
}
if (cmd & IOC_IN) {
if (copy_from_user(kdata, (void __user *)arg, usize)) {
retcode = -EFAULT;
goto out_err;
}
} else if (cmd & IOC_OUT) {
memset(kdata, 0, usize);
}
retcode = func(hpriv, kdata);
if (cmd & IOC_OUT)
if (copy_to_user((void __user *)arg, kdata, usize))
retcode = -EFAULT;
out_err:
if (retcode)
dev_dbg(hdev->dev,
"error in ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
task_pid_nr(current), cmd, nr);
if (kdata != stack_kdata)
kfree(kdata);
return retcode;
}