diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/coresight.h | 5 | ||||
| -rw-r--r-- | include/linux/hyperv.h | 93 | ||||
| -rw-r--r-- | include/linux/mcb.h | 22 | ||||
| -rw-r--r-- | include/linux/miscdevice.h | 8 | ||||
| -rw-r--r-- | include/linux/vme.h | 2 |
5 files changed, 99 insertions, 31 deletions
diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 385d62e64abb..2a5982c37dfb 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -232,8 +232,9 @@ struct coresight_ops_source { int (*cpu_id)(struct coresight_device *csdev); int (*trace_id)(struct coresight_device *csdev); int (*enable)(struct coresight_device *csdev, - struct perf_event_attr *attr, u32 mode); - void (*disable)(struct coresight_device *csdev); + struct perf_event *event, u32 mode); + void (*disable)(struct coresight_device *csdev, + struct perf_event *event); }; struct coresight_ops { diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index b10954a66939..c877e7980585 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -674,6 +674,11 @@ enum hv_signal_policy { HV_SIGNAL_POLICY_EXPLICIT, }; +enum hv_numa_policy { + HV_BALANCED = 0, + HV_LOCALIZED, +}; + enum vmbus_device_type { HV_IDE = 0, HV_SCSI, @@ -850,6 +855,43 @@ struct vmbus_channel { * ring lock to preserve the current behavior. */ bool acquire_ring_lock; + /* + * For performance critical channels (storage, networking + * etc,), Hyper-V has a mechanism to enhance the throughput + * at the expense of latency: + * When the host is to be signaled, we just set a bit in a shared page + * and this bit will be inspected by the hypervisor within a certain + * window and if the bit is set, the host will be signaled. The window + * of time is the monitor latency - currently around 100 usecs. This + * mechanism improves throughput by: + * + * A) Making the host more efficient - each time it wakes up, + * potentially it will process morev number of packets. The + * monitor latency allows a batch to build up. + * B) By deferring the hypercall to signal, we will also minimize + * the interrupts. + * + * Clearly, these optimizations improve throughput at the expense of + * latency. Furthermore, since the channel is shared for both + * control and data messages, control messages currently suffer + * unnecessary latency adversley impacting performance and boot + * time. To fix this issue, permit tagging the channel as being + * in "low latency" mode. In this mode, we will bypass the monitor + * mechanism. + */ + bool low_latency; + + /* + * NUMA distribution policy: + * We support teo policies: + * 1) Balanced: Here all performance critical channels are + * distributed evenly amongst all the NUMA nodes. + * This policy will be the default policy. + * 2) Localized: All channels of a given instance of a + * performance critical service will be assigned CPUs + * within a selected NUMA node. + */ + enum hv_numa_policy affinity_policy; }; @@ -870,6 +912,12 @@ static inline void set_channel_signal_state(struct vmbus_channel *c, c->signal_policy = policy; } +static inline void set_channel_affinity_state(struct vmbus_channel *c, + enum hv_numa_policy policy) +{ + c->affinity_policy = policy; +} + static inline void set_channel_read_state(struct vmbus_channel *c, bool state) { c->batched_reading = state; @@ -891,6 +939,16 @@ static inline void set_channel_pending_send_size(struct vmbus_channel *c, c->outbound.ring_buffer->pending_send_sz = size; } +static inline void set_low_latency_mode(struct vmbus_channel *c) +{ + c->low_latency = true; +} + +static inline void clear_low_latency_mode(struct vmbus_channel *c) +{ + c->low_latency = false; +} + void vmbus_onmessage(void *context); int vmbus_request_offers(void); @@ -1357,6 +1415,9 @@ extern bool vmbus_prep_negotiate_resp(struct icmsg_hdr *, struct icmsg_negotiate *, u8 *, int, int); +void hv_event_tasklet_disable(struct vmbus_channel *channel); +void hv_event_tasklet_enable(struct vmbus_channel *channel); + void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid); /* @@ -1431,31 +1492,23 @@ static inline struct vmpacket_descriptor * get_next_pkt_raw(struct vmbus_channel *channel) { struct hv_ring_buffer_info *ring_info = &channel->inbound; - u32 read_loc = ring_info->priv_read_index; + u32 priv_read_loc = ring_info->priv_read_index; void *ring_buffer = hv_get_ring_buffer(ring_info); - struct vmpacket_descriptor *cur_desc; - u32 packetlen; u32 dsize = ring_info->ring_datasize; - u32 delta = read_loc - ring_info->ring_buffer->read_index; + /* + * delta is the difference between what is available to read and + * what was already consumed in place. We commit read index after + * the whole batch is processed. + */ + u32 delta = priv_read_loc >= ring_info->ring_buffer->read_index ? + priv_read_loc - ring_info->ring_buffer->read_index : + (dsize - ring_info->ring_buffer->read_index) + priv_read_loc; u32 bytes_avail_toread = (hv_get_bytes_to_read(ring_info) - delta); if (bytes_avail_toread < sizeof(struct vmpacket_descriptor)) return NULL; - if ((read_loc + sizeof(*cur_desc)) > dsize) - return NULL; - - cur_desc = ring_buffer + read_loc; - packetlen = cur_desc->len8 << 3; - - /* - * If the packet under consideration is wrapping around, - * return failure. - */ - if ((read_loc + packetlen + VMBUS_PKT_TRAILER) > (dsize - 1)) - return NULL; - - return cur_desc; + return ring_buffer + priv_read_loc; } /* @@ -1467,16 +1520,14 @@ static inline void put_pkt_raw(struct vmbus_channel *channel, struct vmpacket_descriptor *desc) { struct hv_ring_buffer_info *ring_info = &channel->inbound; - u32 read_loc = ring_info->priv_read_index; u32 packetlen = desc->len8 << 3; u32 dsize = ring_info->ring_datasize; - if ((read_loc + packetlen + VMBUS_PKT_TRAILER) > dsize) - BUG(); /* * Include the packet trailer. */ ring_info->priv_read_index += packetlen + VMBUS_PKT_TRAILER; + ring_info->priv_read_index %= dsize; } /* diff --git a/include/linux/mcb.h b/include/linux/mcb.h index ead13d233a97..ee5200d660b0 100644 --- a/include/linux/mcb.h +++ b/include/linux/mcb.h @@ -41,15 +41,17 @@ struct mcb_bus { char name[CHAMELEON_FILENAME_LEN + 1]; int (*get_irq)(struct mcb_device *dev); }; -#define to_mcb_bus(b) container_of((b), struct mcb_bus, dev) + +static inline struct mcb_bus *to_mcb_bus(struct device *dev) +{ + return container_of(dev, struct mcb_bus, dev); +} /** * struct mcb_device - MEN Chameleon Bus device * - * @bus_list: internal list handling for bus code * @dev: device in kernel representation * @bus: mcb bus the device is plugged to - * @subordinate: subordinate MCBus in case of bridge * @is_added: flag to check if device is added to bus * @driver: associated mcb_driver * @id: mcb device id @@ -62,10 +64,8 @@ struct mcb_bus { * @memory: memory resource */ struct mcb_device { - struct list_head bus_list; struct device dev; struct mcb_bus *bus; - struct mcb_bus *subordinate; bool is_added; struct mcb_driver *driver; u16 id; @@ -77,7 +77,11 @@ struct mcb_device { struct resource irq; struct resource mem; }; -#define to_mcb_device(x) container_of((x), struct mcb_device, dev) + +static inline struct mcb_device *to_mcb_device(struct device *dev) +{ + return container_of(dev, struct mcb_device, dev); +} /** * struct mcb_driver - MEN Chameleon Bus device driver @@ -95,7 +99,11 @@ struct mcb_driver { void (*remove)(struct mcb_device *mdev); void (*shutdown)(struct mcb_device *mdev); }; -#define to_mcb_driver(x) container_of((x), struct mcb_driver, driver) + +static inline struct mcb_driver *to_mcb_driver(struct device_driver *drv) +{ + return container_of(drv, struct mcb_driver, driver); +} static inline void *mcb_get_drvdata(struct mcb_device *dev) { diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h index 543037465973..722698a43d79 100644 --- a/include/linux/miscdevice.h +++ b/include/linux/miscdevice.h @@ -3,6 +3,7 @@ #include <linux/major.h> #include <linux/list.h> #include <linux/types.h> +#include <linux/device.h> /* * These allocations are managed by device@lanana.org. If you use an @@ -70,6 +71,13 @@ struct miscdevice { extern int misc_register(struct miscdevice *misc); extern void misc_deregister(struct miscdevice *misc); +/* + * Helper macro for drivers that don't do anything special in module init / exit + * call. This helps in eleminating of boilerplate code. + */ +#define module_misc_device(__misc_device) \ + module_driver(__misc_device, misc_register, misc_deregister) + #define MODULE_ALIAS_MISCDEV(minor) \ MODULE_ALIAS("char-major-" __stringify(MISC_MAJOR) \ "-" __stringify(minor)) diff --git a/include/linux/vme.h b/include/linux/vme.h index 71e4a6dec5ac..ea6095deba20 100644 --- a/include/linux/vme.h +++ b/include/linux/vme.h @@ -166,7 +166,7 @@ struct vme_resource *vme_lm_request(struct vme_dev *); int vme_lm_count(struct vme_resource *); int vme_lm_set(struct vme_resource *, unsigned long long, u32, u32); int vme_lm_get(struct vme_resource *, unsigned long long *, u32 *, u32 *); -int vme_lm_attach(struct vme_resource *, int, void (*callback)(int)); +int vme_lm_attach(struct vme_resource *, int, void (*callback)(void *), void *); int vme_lm_detach(struct vme_resource *, int); void vme_lm_free(struct vme_resource *); |