diff options
Diffstat (limited to 'sys/dev/isci/isci_controller.c')
| -rw-r--r-- | sys/dev/isci/isci_controller.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/sys/dev/isci/isci_controller.c b/sys/dev/isci/isci_controller.c index 49785cb..1255201 100644 --- a/sys/dev/isci/isci_controller.c +++ b/sys/dev/isci/isci_controller.c @@ -145,6 +145,14 @@ void scif_cb_controller_stop_complete(SCI_CONTROLLER_HANDLE_T controller, isci_controller->is_started = FALSE; } +static void +isci_single_map(void *arg, bus_dma_segment_t *seg, int nseg, int error) +{ + SCI_PHYSICAL_ADDRESS *phys_addr = arg; + + *phys_addr = seg[0].ds_addr; +} + /** * @brief This method will be invoked to allocate memory dynamically. * @@ -159,7 +167,29 @@ void scif_cb_controller_stop_complete(SCI_CONTROLLER_HANDLE_T controller, void scif_cb_controller_allocate_memory(SCI_CONTROLLER_HANDLE_T controller, SCI_PHYSICAL_MEMORY_DESCRIPTOR_T *mde) { + struct ISCI_CONTROLLER *isci_controller = (struct ISCI_CONTROLLER *) + sci_object_get_association(controller); + /* + * Note this routine is only used for buffers needed to translate + * SCSI UNMAP commands to ATA DSM commands for SATA disks. + * + * We first try to pull a buffer from the controller's pool, and only + * call contigmalloc if one isn't there. + */ + if (!sci_pool_empty(isci_controller->unmap_buffer_pool)) { + sci_pool_get(isci_controller->unmap_buffer_pool, + mde->virtual_address); + } else + mde->virtual_address = contigmalloc(PAGE_SIZE, + M_ISCI, M_NOWAIT, 0, BUS_SPACE_MAXADDR, + mde->constant_memory_alignment, 0); + + if (mde->virtual_address != NULL) + bus_dmamap_load(isci_controller->buffer_dma_tag, + NULL, mde->virtual_address, PAGE_SIZE, + isci_single_map, &mde->physical_address, + BUS_DMA_NOWAIT); } /** @@ -176,7 +206,16 @@ void scif_cb_controller_allocate_memory(SCI_CONTROLLER_HANDLE_T controller, void scif_cb_controller_free_memory(SCI_CONTROLLER_HANDLE_T controller, SCI_PHYSICAL_MEMORY_DESCRIPTOR_T * mde) { + struct ISCI_CONTROLLER *isci_controller = (struct ISCI_CONTROLLER *) + sci_object_get_association(controller); + /* + * Put the buffer back into the controller's buffer pool, rather + * than invoking configfree. This helps reduce chance we won't + * have buffers available when system is under memory pressure. + */ + sci_pool_put(isci_controller->unmap_buffer_pool, + mde->virtual_address); } void isci_controller_construct(struct ISCI_CONTROLLER *controller, @@ -228,6 +267,8 @@ void isci_controller_construct(struct ISCI_CONTROLLER *controller, for ( int i = 0; i < SCI_MAX_TIMERS; i++ ) { sci_pool_put(controller->timer_pool, timer++); } + + sci_pool_initialize(controller->unmap_buffer_pool); } SCI_STATUS isci_controller_initialize(struct ISCI_CONTROLLER *controller) |
