From: Felipe Balbi Date: Mon, 4 Apr 2016 12:33:41 +0000 (+0300) Subject: usb: dwc3: gadget: rename busy/free_slot to trb_enqueue/dequeue X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=53fd88189e08c91cb9b43e2d51b4eb314a3d00d7;p=linux-beck.git usb: dwc3: gadget: rename busy/free_slot to trb_enqueue/dequeue This makes it clear that we're dealing with a queue of TRBs. No functional changes. While at that, also rename start_slot to first_trb_index for similar reasons. Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index f965e961b40e..a29d797bfcf4 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -449,8 +449,8 @@ struct dwc3_event_buffer { * @started_list: list of started requests on this endpoint * @trb_pool: array of transaction buffers * @trb_pool_dma: dma address of @trb_pool - * @free_slot: next slot which is going to be used - * @busy_slot: first slot which is owned by HW + * @trb_enqueue: enqueue 'pointer' into TRB array + * @trb_dequeue: dequeue 'pointer' into TRB array * @desc: usb_endpoint_descriptor pointer * @dwc: pointer to DWC controller * @saved_state: ep state saved during hibernation @@ -470,8 +470,8 @@ struct dwc3_ep { struct dwc3_trb *trb_pool; dma_addr_t trb_pool_dma; - u32 free_slot; - u32 busy_slot; + u32 trb_enqueue; + u32 trb_dequeue; const struct usb_ss_ep_comp_descriptor *comp_desc; struct dwc3 *dwc; @@ -628,7 +628,7 @@ struct dwc3_request { struct usb_request request; struct list_head list; struct dwc3_ep *dep; - u32 start_slot; + u32 first_trb_index; u8 epnum; struct dwc3_trb *trb; diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 5e0a21b65053..143deb420481 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -70,10 +70,10 @@ static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma, return 0; } - trb = &dwc->ep0_trb[dep->free_slot]; + trb = &dwc->ep0_trb[dep->trb_enqueue]; if (chain) - dep->free_slot++; + dep->trb_enqueue++; trb->bpl = lower_32_bits(buf_dma); trb->bph = upper_32_bits(buf_dma); @@ -845,7 +845,7 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc, trb++; length = trb->size & DWC3_TRB_SIZE_MASK; - ep0->free_slot = 0; + ep0->trb_enqueue = 0; } transfer_size = roundup((ur->length - transfer_size), diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 0e271584e4cf..bb29f4f08f5d 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -154,16 +154,16 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, if (req->started) { i = 0; do { - dep->busy_slot++; + dep->trb_dequeue++; /* * Skip LINK TRB. We can't use req->trb and check for * DWC3_TRBCTL_LINK_TRB because it points the TRB we * just completed (not the LINK TRB). */ - if (((dep->busy_slot & DWC3_TRB_MASK) == + if (((dep->trb_dequeue & DWC3_TRB_MASK) == DWC3_TRB_NUM- 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) - dep->busy_slot++; + dep->trb_dequeue++; } while(++i < req->request.num_mapped_sgs); req->started = false; } @@ -741,20 +741,20 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, chain ? " chain" : ""); - trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK]; + trb = &dep->trb_pool[dep->trb_enqueue & DWC3_TRB_MASK]; if (!req->trb) { dwc3_gadget_move_started_request(req); req->trb = trb; req->trb_dma = dwc3_trb_dma_offset(dep, trb); - req->start_slot = dep->free_slot & DWC3_TRB_MASK; + req->first_trb_index = dep->trb_enqueue & DWC3_TRB_MASK; } - dep->free_slot++; + dep->trb_enqueue++; /* Skip the LINK-TRB on ISOC */ - if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && + if (((dep->trb_enqueue & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) - dep->free_slot++; + dep->trb_enqueue++; trb->size = DWC3_TRB_SIZE_LENGTH(length); trb->bpl = lower_32_bits(dma); @@ -826,11 +826,11 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM); /* the first request must not be queued */ - trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK; + trbs_left = (dep->trb_dequeue - dep->trb_enqueue) & DWC3_TRB_MASK; /* Can't wrap around on a non-isoc EP since there's no link TRB */ if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) { - max = DWC3_TRB_NUM - (dep->free_slot & DWC3_TRB_MASK); + max = DWC3_TRB_NUM - (dep->trb_enqueue & DWC3_TRB_MASK); if (trbs_left > max) trbs_left = max; } @@ -856,11 +856,11 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) * don't wrap around we have to start at the beginning. */ if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) { - dep->busy_slot = 1; - dep->free_slot = 1; + dep->trb_dequeue = 1; + dep->trb_enqueue = 1; } else { - dep->busy_slot = 0; - dep->free_slot = 0; + dep->trb_dequeue = 0; + dep->trb_enqueue = 0; } } @@ -1931,7 +1931,7 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep, i = 0; do { - slot = req->start_slot + i; + slot = req->first_trb_index + i; if ((slot == DWC3_TRB_NUM - 1) && usb_endpoint_xfer_isoc(dep->endpoint.desc)) slot++;