diff options
| -rw-r--r-- | sys/arm/arm/busdma_machdep-v6.c | 66 |
1 files changed, 63 insertions, 3 deletions
diff --git a/sys/arm/arm/busdma_machdep-v6.c b/sys/arm/arm/busdma_machdep-v6.c index 1e460a02b255..e868d9c15946 100644 --- a/sys/arm/arm/busdma_machdep-v6.c +++ b/sys/arm/arm/busdma_machdep-v6.c @@ -137,9 +137,40 @@ struct bounce_zone { static struct mtx bounce_lock; static int total_bpages; static int busdma_zonecount; +static uint32_t tags_total; +static uint32_t maps_total; +static uint32_t maps_dmamem; +static uint32_t maps_coherent; +static uint64_t maploads_total; +static uint64_t maploads_bounced; +static uint64_t maploads_coherent; +static uint64_t maploads_dmamem; +static uint64_t maploads_mbuf; +static uint64_t maploads_physmem; + static STAILQ_HEAD(, bounce_zone) bounce_zone_list; SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0, "Busdma parameters"); +SYSCTL_UINT(_hw_busdma, OID_AUTO, tags_total, CTLFLAG_RD, &tags_total, 0, + "Number of active tags"); +SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_total, CTLFLAG_RD, &maps_total, 0, + "Number of active maps"); +SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_dmamem, CTLFLAG_RD, &maps_dmamem, 0, + "Number of active maps for bus_dmamem_alloc buffers"); +SYSCTL_UINT(_hw_busdma, OID_AUTO, maps_coherent, CTLFLAG_RD, &maps_coherent, 0, + "Number of active maps with BUS_DMA_COHERENT flag set"); +SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_total, CTLFLAG_RD, &maploads_total, 0, + "Number of load operations performed"); +SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_bounced, CTLFLAG_RD, &maploads_bounced, 0, + "Number of load operations that used bounce buffers"); +SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_coherent, CTLFLAG_RD, &maploads_dmamem, 0, + "Number of load operations on BUS_DMA_COHERENT memory"); +SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_dmamem, CTLFLAG_RD, &maploads_dmamem, 0, + "Number of load operations on bus_dmamem_alloc buffers"); +SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_mbuf, CTLFLAG_RD, &maploads_mbuf, 0, + "Number of load operations for mbufs"); +SYSCTL_UQUAD(_hw_busdma, OID_AUTO, maploads_physmem, CTLFLAG_RD, &maploads_physmem, 0, + "Number of load operations on physical buffers"); SYSCTL_INT(_hw_busdma, OID_AUTO, total_bpages, CTLFLAG_RD, &total_bpages, 0, "Total bounce pages"); @@ -536,6 +567,7 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment, if (error != 0) { free(newtag, M_DEVBUF); } else { + atomic_add_32(&tags_total, 1); *dmat = newtag; } CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d", @@ -565,6 +597,7 @@ bus_dma_tag_destroy(bus_dma_tag_t dmat) parent = dmat->parent; atomic_subtract_int(&dmat->ref_count, 1); if (dmat->ref_count == 0) { + atomic_subtract_32(&tags_total, 1); free(dmat, M_DEVBUF); /* * Last reference count, so @@ -675,7 +708,10 @@ bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp) *mapp = NULL; return (error); } - return (error); + if (map->flags & DMAMAP_COHERENT) + atomic_add_32(&maps_coherent, 1); + atomic_add_32(&maps_total, 1); + return (0); } /* @@ -692,6 +728,9 @@ bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map) } if (dmat->bounce_zone) dmat->bounce_zone->map_count--; + if (map->flags & DMAMAP_COHERENT) + atomic_subtract_32(&maps_coherent, 1); + atomic_subtract_32(&maps_total, 1); free(map, M_DEVBUF); dmat->map_count--; CTR2(KTR_BUSDMA, "%s: tag %p error 0", __func__, dmat); @@ -780,6 +819,10 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags, *mapp = NULL; return (ENOMEM); } + if (map->flags & DMAMAP_COHERENT) + atomic_add_32(&maps_coherent, 1); + atomic_add_32(&maps_dmamem, 1); + atomic_add_32(&maps_total, 1); dmat->map_count++; CTR4(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d", @@ -813,6 +856,10 @@ bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map) kmem_free(kernel_arena, (vm_offset_t)vaddr, dmat->maxsize); dmat->map_count--; + if (map->flags & DMAMAP_COHERENT) + atomic_subtract_32(&maps_coherent, 1); + atomic_subtract_32(&maps_total, 1); + atomic_subtract_32(&maps_dmamem, 1); free(map, M_DEVBUF); CTR3(KTR_BUSDMA, "%s: tag %p flags 0x%x", __func__, dmat, dmat->flags); } @@ -990,9 +1037,13 @@ _bus_dmamap_load_phys(bus_dma_tag_t dmat, if (segs == NULL) segs = map->segments; + maploads_total++; + maploads_physmem++; + if (might_bounce(dmat, map, buflen, buflen)) { _bus_dmamap_count_phys(dmat, map, buf, buflen, flags); if (map->pagesneeded != 0) { + maploads_bounced++; error = _bus_dmamap_reserve_pages(dmat, map, flags); if (error) return (error); @@ -1055,17 +1106,26 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat, struct sync_list *sl; int error; + maploads_total++; + if (map->flags & DMAMAP_COHERENT) + maploads_coherent++; + if (map->flags & DMAMAP_DMAMEM_ALLOC) + maploads_dmamem++; + if (segs == NULL) segs = map->segments; - if (flags & BUS_DMA_LOAD_MBUF) + if (flags & BUS_DMA_LOAD_MBUF) { + maploads_mbuf++; map->flags |= DMAMAP_MBUF; + } map->pmap = pmap; if (might_bounce(dmat, map, (bus_addr_t)buf, buflen)) { _bus_dmamap_count_pages(dmat, map, buf, buflen, flags); if (map->pagesneeded != 0) { + maploads_bounced++; error = _bus_dmamap_reserve_pages(dmat, map, flags); if (error) return (error); @@ -1449,7 +1509,7 @@ alloc_bounce_zone(bus_dma_tag_t dmat) SYSCTL_ADD_INT(busdma_sysctl_tree(bz), SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, "total_bounced", CTLFLAG_RD, &bz->total_bounced, 0, - "Total bounce requests"); + "Total bounce requests (pages bounced)"); SYSCTL_ADD_INT(busdma_sysctl_tree(bz), SYSCTL_CHILDREN(busdma_sysctl_tree_top(bz)), OID_AUTO, "total_deferred", CTLFLAG_RD, &bz->total_deferred, 0, |