On Tue, Jun 14, 2022 at 08:29:38PM +0800, Kai Ye wrote:
> UACCE add the hardware error isolation API. Users can configure
> the error frequency threshold by this vfs node. This API interface
> certainly supports the configuration of user protocol strategy. Then
> parse it inside the device driver. UACCE only reports the device
> isolate state. When the error frequency is exceeded, the device
> will be isolated. The isolation strategy should be defined in each
> driver module.
>
> Signed-off-by: Kai Ye <yekai13@xxxxxxxxxx>
> Reviewed-by: Zhou Wang <wangzhou1@xxxxxxxxxxxxx>
> ---
> drivers/misc/uacce/uacce.c | 37 +++++++++++++++++++++++++++++++++++++
> include/linux/uacce.h | 16 +++++++++++++---
> 2 files changed, 50 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c
> index b6219c6bfb48..525623215132 100644
> --- a/drivers/misc/uacce/uacce.c
> +++ b/drivers/misc/uacce/uacce.c
> @@ -346,12 +346,47 @@ static ssize_t region_dus_size_show(struct device *dev,
> uacce->qf_pg_num[UACCE_QFRT_DUS] << PAGE_SHIFT);
> }
>
> +static ssize_t isolate_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct uacce_device *uacce = to_uacce_device(dev);
> +
> + return sysfs_emit(buf, "%d\n", uacce->ops->get_isolate_state(uacce));
> +}
> +
> +static ssize_t isolate_strategy_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct uacce_device *uacce = to_uacce_device(dev);
> +
> + return sysfs_emit(buf, "%s\n", uacce->isolate_strategy);
> +}
> +
> +static ssize_t isolate_strategy_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct uacce_device *uacce = to_uacce_device(dev);
> + int ret;
> +
> + if (!buf || sizeof(buf) > UACCE_MAX_ISOLATE_STRATEGY_LEN)
> + return -EINVAL;
> +
> + memcpy(uacce->isolate_strategy, buf, strlen(buf));
> +
> + ret = uacce->ops->isolate_strategy_write(uacce, buf);
> +
> + return ret ? ret : count;
> +}
> +
> static DEVICE_ATTR_RO(api);
> static DEVICE_ATTR_RO(flags);
> static DEVICE_ATTR_RO(available_instances);
> static DEVICE_ATTR_RO(algorithms);
> static DEVICE_ATTR_RO(region_mmio_size);
> static DEVICE_ATTR_RO(region_dus_size);
> +static DEVICE_ATTR_RO(isolate);
> +static DEVICE_ATTR_RW(isolate_strategy);
>
> static struct attribute *uacce_dev_attrs[] = {
> &dev_attr_api.attr,
> @@ -360,6 +395,8 @@ static struct attribute *uacce_dev_attrs[] = {
> &dev_attr_algorithms.attr,
> &dev_attr_region_mmio_size.attr,
> &dev_attr_region_dus_size.attr,
> + &dev_attr_isolate.attr,
> + &dev_attr_isolate_strategy.attr,
> NULL,
> };
>
> diff --git a/include/linux/uacce.h b/include/linux/uacce.h
> index 48e319f40275..0f7668bfa645 100644
> --- a/include/linux/uacce.h
> +++ b/include/linux/uacce.h
> @@ -8,6 +8,7 @@
> #define UACCE_NAME "uacce"
> #define UACCE_MAX_REGION 2
> #define UACCE_MAX_NAME_SIZE 64
> +#define UACCE_MAX_ISOLATE_STRATEGY_LEN 256
So it's a random string of characters? What format?
>
> struct uacce_queue;
> struct uacce_device;
> @@ -30,6 +31,8 @@ struct uacce_qfile_region {
> * @is_q_updated: check whether the task is finished
> * @mmap: mmap addresses of queue to user space
> * @ioctl: ioctl for user space users of the queue
> + * @get_isolate_state: get the device state after set the isolate strategy
> + * @isolate_strategy_store: stored the isolate strategy to the device
> */
> struct uacce_ops {
> int (*get_available_instances)(struct uacce_device *uacce);
> @@ -43,6 +46,8 @@ struct uacce_ops {
> struct uacce_qfile_region *qfr);
> long (*ioctl)(struct uacce_queue *q, unsigned int cmd,
> unsigned long arg);
> + enum uacce_dev_state (*get_isolate_state)(struct uacce_device *uacce);
> + int (*isolate_strategy_write)(struct uacce_device *uacce, const char *buf);
Length of the buffer?
> };
>
> /**
> @@ -57,6 +62,12 @@ struct uacce_interface {
> const struct uacce_ops *ops;
> };
>
> +enum uacce_dev_state {
> + UACCE_DEV_ERR = -1,
> + UACCE_DEV_NORMAL,
> + UACCE_DEV_ISOLATE,
> +};
> +
> enum uacce_q_state {
> UACCE_Q_ZOMBIE = 0,
> UACCE_Q_INIT,
> @@ -117,6 +128,7 @@ struct uacce_device {
> struct list_head queues;
> struct mutex queues_lock;
> struct inode *inode;
> + char isolate_strategy[UACCE_MAX_ISOLATE_STRATEGY_LEN];
> };
>
> #if IS_ENABLED(CONFIG_UACCE)
> @@ -125,7 +137,7 @@ struct uacce_device *uacce_alloc(struct device *parent,
> struct uacce_interface *interface);
> int uacce_register(struct uacce_device *uacce);
> void uacce_remove(struct uacce_device *uacce);
> -
> +struct uacce_device *dev_to_uacce(struct device *dev);
Why is this moved to the .h file yet the function is not exported?
thanks,
greg k-h
