subr_busdma_bounce.c File Reference

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Data Structures
struct	bounce_page
struct	bounce_zone

Functions
static	STAILQ_HEAD (bounce_zone)
static void	init_bounce_pages (void *dummy __unused)
	SYSINIT (bpages, SI_SUB_LOCK, SI_ORDER_ANY, init_bounce_pages, NULL)
static struct sysctl_ctx_list *	busdma_sysctl_tree (struct bounce_zone *bz)
static struct sysctl_oid *	busdma_sysctl_tree_top (struct bounce_zone *bz)
static int	alloc_bounce_zone (bus_dma_tag_t dmat)
static int	alloc_bounce_pages (bus_dma_tag_t dmat, u_int numpages)
static int	reserve_bounce_pages (bus_dma_tag_t dmat, bus_dmamap_t map, int commit)
static bus_addr_t	add_bounce_page (bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr, bus_addr_t addr, bus_size_t size)
static void	free_bounce_page (bus_dma_tag_t dmat, struct bounce_page *bpage)
static void	busdma_swi (void *dummy __unused)
static void	start_busdma_swi (void *dummy __unused)
	SYSINIT (start_busdma_swi, SI_SUB_SOFTINTR, SI_ORDER_ANY, start_busdma_swi, NULL)

Variables
static struct mtx	bounce_lock
static int	total_bpages
static int	busdma_zonecount

Function Documentation

add_bounce_page()

static bus_addr_t add_bounce_page ( bus_dma_tag_t  dmat, bus_dmamap_t  map, vm_offset_t  vaddr, bus_addr_t  addr, bus_size_t  size  )

static

Definition at line 308 of file subr_busdma_bounce.c.

References addr, bounce_lock, bounce_page::busaddr, bounce_page::datacount, bounce_page::dataoffs, bounce_page::datapage, bounce_page::datavaddr, panic(), and bounce_page::vaddr.

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alloc_bounce_pages()

static int alloc_bounce_pages ( bus_dma_tag_t  dmat, u_int  numpages  )

static

Definition at line 239 of file subr_busdma_bounce.c.

References bounce_lock, bounce_page::busaddr, contigmalloc(), contigmalloc_domainset(), count, free(), malloc(), malloc_domainset(), total_bpages, and bounce_page::vaddr.

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alloc_bounce_zone()

static int alloc_bounce_zone ( bus_dma_tag_t  dmat )

static

Definition at line 152 of file subr_busdma_bounce.c.

References busdma_sysctl_tree(), busdma_sysctl_tree_top(), busdma_zonecount, malloc(), snprintf(), sysctl_ctx_free(), and sysctl_ctx_init().

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busdma_swi()

static void busdma_swi ( void *dummy  __unused )

static

Definition at line 411 of file subr_busdma_bounce.c.

References bounce_lock, and bus_dmamap_load_mem().

Referenced by start_busdma_swi().

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busdma_sysctl_tree()

static struct sysctl_ctx_list * busdma_sysctl_tree ( struct bounce_zone *  bz )

static

Definition at line 138 of file subr_busdma_bounce.c.

Referenced by alloc_bounce_zone().

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busdma_sysctl_tree_top()

static struct sysctl_oid * busdma_sysctl_tree_top ( struct bounce_zone *  bz )

static

Definition at line 145 of file subr_busdma_bounce.c.

Referenced by alloc_bounce_zone().

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free_bounce_page()

static void free_bounce_page ( bus_dma_tag_t  dmat, struct bounce_page *  bpage  )

static

Definition at line 372 of file subr_busdma_bounce.c.

References bounce_lock, bounce_page::busaddr, bounce_page::datacount, bounce_page::datavaddr, reserve_bounce_pages(), swi_sched(), and bounce_page::vaddr.

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init_bounce_pages()

static void init_bounce_pages ( void *dummy  __unused )

static

Definition at line 126 of file subr_busdma_bounce.c.

References bounce_lock, and total_bpages.

reserve_bounce_pages()

static int reserve_bounce_pages ( bus_dma_tag_t  dmat, bus_dmamap_t  map, int  commit  )

static

Definition at line 284 of file subr_busdma_bounce.c.

References bounce_lock.

Referenced by free_bounce_page().

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STAILQ_HEAD()

static STAILQ_HEAD ( bounce_zone  )

static

Definition at line 87 of file subr_busdma_bounce.c.

start_busdma_swi()

static void start_busdma_swi ( void *dummy  __unused )

static

Definition at line 431 of file subr_busdma_bounce.c.

References busdma_swi(), panic(), and swi_add().

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SYSINIT() [1/2]

SYSINIT	(	bpages	,
		SI_SUB_LOCK	,
		SI_ORDER_ANY	,
		init_bounce_pages	,
		NULL
	)

SYSINIT() [2/2]

SYSINIT	(	start_busdma_swi	,
		SI_SUB_SOFTINTR	,
		SI_ORDER_ANY	,
		start_busdma_swi	,
		NULL
	)

Variable Documentation

bounce_lock

struct mtx bounce_lock

static

Definition at line 83 of file subr_busdma_bounce.c.

Referenced by add_bounce_page(), alloc_bounce_pages(), busdma_swi(), free_bounce_page(), init_bounce_pages(), and reserve_bounce_pages().

busdma_zonecount

int busdma_zonecount

static

Definition at line 85 of file subr_busdma_bounce.c.

Referenced by alloc_bounce_zone().

total_bpages

int total_bpages

static

Definition at line 84 of file subr_busdma_bounce.c.

Referenced by alloc_bounce_pages(), and init_bounce_pages().