diff options
Diffstat (limited to 'drivers/hwtracing/ptt/hisi_ptt.h')
-rw-r--r-- | drivers/hwtracing/ptt/hisi_ptt.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/hwtracing/ptt/hisi_ptt.h b/drivers/hwtracing/ptt/hisi_ptt.h index 5beb1648c93a..d598411e9cb8 100644 --- a/drivers/hwtracing/ptt/hisi_ptt.h +++ b/drivers/hwtracing/ptt/hisi_ptt.h @@ -11,12 +11,15 @@ #include <linux/bits.h> #include <linux/cpumask.h> +#include <linux/kfifo.h> #include <linux/list.h> #include <linux/mutex.h> +#include <linux/notifier.h> #include <linux/pci.h> #include <linux/perf_event.h> #include <linux/spinlock.h> #include <linux/types.h> +#include <linux/workqueue.h> #define DRV_NAME "hisi_ptt" @@ -71,6 +74,11 @@ #define HISI_PTT_WAIT_TRACE_TIMEOUT_US 100UL #define HISI_PTT_WAIT_POLL_INTERVAL_US 10UL +/* FIFO size for dynamically updating the PTT trace filter list. */ +#define HISI_PTT_FILTER_UPDATE_FIFO_SIZE 16 +/* Delay time for filter updating work */ +#define HISI_PTT_WORK_DELAY_MS 100UL + #define HISI_PCIE_CORE_PORT_ID(devfn) ((PCI_SLOT(devfn) & 0x7) << 1) /* Definition of the PMU configs */ @@ -135,11 +143,25 @@ struct hisi_ptt_trace_ctrl { * struct hisi_ptt_filter_desc - Descriptor of the PTT trace filter * @list: entry of this descriptor in the filter list * @is_port: the PCI device of the filter is a Root Port or not + * @name: name of this filter, same as the name of the related PCI device * @devid: the PCI device's devid of the filter */ struct hisi_ptt_filter_desc { struct list_head list; bool is_port; + char *name; + u16 devid; +}; + +/** + * struct hisi_ptt_filter_update_info - Information for PTT filter updating + * @is_port: the PCI device to update is a Root Port or not + * @is_add: adding to the filter or not + * @devid: the PCI device's devid of the filter + */ +struct hisi_ptt_filter_update_info { + bool is_port; + bool is_add; u16 devid; }; @@ -160,6 +182,7 @@ struct hisi_ptt_pmu_buf { /** * struct hisi_ptt - Per PTT device data * @trace_ctrl: the control information of PTT trace + * @hisi_ptt_nb: dynamic filter update notifier * @hotplug_node: node for register cpu hotplug event * @hisi_ptt_pmu: the pum device of trace * @iobase: base IO address of the device @@ -170,10 +193,15 @@ struct hisi_ptt_pmu_buf { * @lower_bdf: the lower BDF range of the PCI devices managed by this PTT device * @port_filters: the filter list of root ports * @req_filters: the filter list of requester ID + * @filter_lock: lock to protect the filters * @port_mask: port mask of the managed root ports + * @work: delayed work for filter updating + * @filter_update_lock: spinlock to protect the filter update fifo + * @filter_update_fifo: fifo of the filters waiting to update the filter list */ struct hisi_ptt { struct hisi_ptt_trace_ctrl trace_ctrl; + struct notifier_block hisi_ptt_nb; struct hlist_node hotplug_node; struct pmu hisi_ptt_pmu; void __iomem *iobase; @@ -192,7 +220,19 @@ struct hisi_ptt { */ struct list_head port_filters; struct list_head req_filters; + struct mutex filter_lock; u16 port_mask; + + /* + * We use a delayed work here to avoid indefinitely waiting for + * the hisi_ptt->mutex which protecting the filter list. The + * work will be delayed only if the mutex can not be held, + * otherwise no delay will be applied. + */ + struct delayed_work work; + spinlock_t filter_update_lock; + DECLARE_KFIFO(filter_update_kfifo, struct hisi_ptt_filter_update_info, + HISI_PTT_FILTER_UPDATE_FIFO_SIZE); }; #define to_hisi_ptt(pmu) container_of(pmu, struct hisi_ptt, hisi_ptt_pmu) |