drivers/infiniband/hw/hfi1/affinity.h

Source file repositories/reference/linux-study-clean/drivers/infiniband/hw/hfi1/affinity.h

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/hw/hfi1/affinity.h
Extension
.h
Size
2165 bytes
Lines
89
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cpu_mask_set {
	struct cpumask mask;
	struct cpumask used;
	uint gen;
};

struct hfi1_msix_entry;

/* Initialize non-HT cpu cores mask */
void init_real_cpu_mask(void);
/* Initialize driver affinity data */
int hfi1_dev_affinity_init(struct hfi1_devdata *dd);
/*
 * Set IRQ affinity to a CPU. The function will determine the
 * CPU and set the affinity to it.
 */
int hfi1_get_irq_affinity(struct hfi1_devdata *dd,
			  struct hfi1_msix_entry *msix);
/*
 * Remove the IRQ's CPU affinity. This function also updates
 * any internal CPU tracking data
 */
void hfi1_put_irq_affinity(struct hfi1_devdata *dd,
			   struct hfi1_msix_entry *msix);
/*
 * Determine a CPU affinity for a user process, if the process does not
 * have an affinity set yet.
 */
int hfi1_get_proc_affinity(int node);
/* Release a CPU used by a user process. */
void hfi1_put_proc_affinity(int cpu);

struct hfi1_affinity_node {
	int node;
	u16 __percpu *comp_vect_affinity;
	struct cpu_mask_set def_intr;
	struct cpu_mask_set rcv_intr;
	struct cpumask general_intr_mask;
	struct cpumask comp_vect_mask;
	struct list_head list;
};

struct hfi1_affinity_node_list {
	struct list_head list;
	struct cpumask real_cpu_mask;
	struct cpu_mask_set proc;
	int num_core_siblings;
	int num_possible_nodes;
	int num_online_nodes;
	int num_online_cpus;
	struct mutex lock; /* protects affinity nodes */
};

int node_affinity_init(void);
void node_affinity_destroy_all(void);
extern struct hfi1_affinity_node_list node_affinity;
void hfi1_dev_affinity_clean_up(struct hfi1_devdata *dd);
int hfi1_comp_vect_mappings_lookup(struct rvt_dev_info *rdi, int comp_vect);
int hfi1_comp_vectors_set_up(struct hfi1_devdata *dd);
void hfi1_comp_vectors_clean_up(struct hfi1_devdata *dd);

#endif /* _HFI1_AFFINITY_H */

Annotation

Implementation Notes