From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752038AbdHAKim (ORCPT ); Tue, 1 Aug 2017 06:38:42 -0400 Received: from mail-qk0-f181.google.com ([209.85.220.181]:36084 "EHLO mail-qk0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752000AbdHAKij (ORCPT ); Tue, 1 Aug 2017 06:38:39 -0400 From: Anup Patel To: Rob Herring , Mark Rutland , Vinod Koul , Dan Williams Cc: Florian Fainelli , Scott Branden , Ray Jui , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, dmaengine@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, Anup Patel Subject: [PATCH v2 03/16] dmaengine: bcm-sba-raid: Common flags for sba_request state and fence Date: Tue, 1 Aug 2017 16:07:47 +0530 Message-Id: <1501583880-32072-4-git-send-email-anup.patel@broadcom.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1501583880-32072-1-git-send-email-anup.patel@broadcom.com> References: <1501583880-32072-1-git-send-email-anup.patel@broadcom.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch merges sba_request state and fence into common sba_request flags. Also, in-future we can extend sba_request flags as required. Signed-off-by: Anup Patel --- drivers/dma/bcm-sba-raid.c | 66 ++++++++++++++++++++++++++-------------------- 1 file changed, 38 insertions(+), 28 deletions(-) diff --git a/drivers/dma/bcm-sba-raid.c b/drivers/dma/bcm-sba-raid.c index f81d5ac..6fa3df1 100644 --- a/drivers/dma/bcm-sba-raid.c +++ b/drivers/dma/bcm-sba-raid.c @@ -91,22 +91,23 @@ /* ===== Driver data structures ===== */ -enum sba_request_state { - SBA_REQUEST_STATE_FREE = 1, - SBA_REQUEST_STATE_ALLOCED = 2, - SBA_REQUEST_STATE_PENDING = 3, - SBA_REQUEST_STATE_ACTIVE = 4, - SBA_REQUEST_STATE_RECEIVED = 5, - SBA_REQUEST_STATE_COMPLETED = 6, - SBA_REQUEST_STATE_ABORTED = 7, +enum sba_request_flags { + SBA_REQUEST_STATE_FREE = 0x001, + SBA_REQUEST_STATE_ALLOCED = 0x002, + SBA_REQUEST_STATE_PENDING = 0x004, + SBA_REQUEST_STATE_ACTIVE = 0x008, + SBA_REQUEST_STATE_RECEIVED = 0x010, + SBA_REQUEST_STATE_COMPLETED = 0x020, + SBA_REQUEST_STATE_ABORTED = 0x040, + SBA_REQUEST_STATE_MASK = 0x0ff, + SBA_REQUEST_FENCE = 0x100, }; struct sba_request { /* Global state */ struct list_head node; struct sba_device *sba; - enum sba_request_state state; - bool fence; + u32 flags; /* Chained requests management */ struct sba_request *first; struct list_head next; @@ -217,8 +218,7 @@ static struct sba_request *sba_alloc_request(struct sba_device *sba) if (!req) return NULL; - req->state = SBA_REQUEST_STATE_ALLOCED; - req->fence = false; + req->flags = SBA_REQUEST_STATE_ALLOCED; req->first = req; INIT_LIST_HEAD(&req->next); req->next_count = 1; @@ -234,7 +234,8 @@ static void _sba_pending_request(struct sba_device *sba, struct sba_request *req) { lockdep_assert_held(&sba->reqs_lock); - req->state = SBA_REQUEST_STATE_PENDING; + req->flags &= ~SBA_REQUEST_STATE_MASK; + req->flags |= SBA_REQUEST_STATE_PENDING; list_move_tail(&req->node, &sba->reqs_pending_list); if (list_empty(&sba->reqs_active_list)) sba->reqs_fence = false; @@ -249,9 +250,10 @@ static bool _sba_active_request(struct sba_device *sba, sba->reqs_fence = false; if (sba->reqs_fence) return false; - req->state = SBA_REQUEST_STATE_ACTIVE; + req->flags &= ~SBA_REQUEST_STATE_MASK; + req->flags |= SBA_REQUEST_STATE_ACTIVE; list_move_tail(&req->node, &sba->reqs_active_list); - if (req->fence) + if (req->flags & SBA_REQUEST_FENCE) sba->reqs_fence = true; return true; } @@ -261,7 +263,8 @@ static void _sba_abort_request(struct sba_device *sba, struct sba_request *req) { lockdep_assert_held(&sba->reqs_lock); - req->state = SBA_REQUEST_STATE_ABORTED; + req->flags &= ~SBA_REQUEST_STATE_MASK; + req->flags |= SBA_REQUEST_STATE_ABORTED; list_move_tail(&req->node, &sba->reqs_aborted_list); if (list_empty(&sba->reqs_active_list)) sba->reqs_fence = false; @@ -272,7 +275,8 @@ static void _sba_free_request(struct sba_device *sba, struct sba_request *req) { lockdep_assert_held(&sba->reqs_lock); - req->state = SBA_REQUEST_STATE_FREE; + req->flags &= ~SBA_REQUEST_STATE_MASK; + req->flags |= SBA_REQUEST_STATE_FREE; list_move_tail(&req->node, &sba->reqs_free_list); if (list_empty(&sba->reqs_active_list)) sba->reqs_fence = false; @@ -285,7 +289,8 @@ static void sba_received_request(struct sba_request *req) struct sba_device *sba = req->sba; spin_lock_irqsave(&sba->reqs_lock, flags); - req->state = SBA_REQUEST_STATE_RECEIVED; + req->flags &= ~SBA_REQUEST_STATE_MASK; + req->flags |= SBA_REQUEST_STATE_RECEIVED; list_move_tail(&req->node, &sba->reqs_received_list); spin_unlock_irqrestore(&sba->reqs_lock, flags); } @@ -298,10 +303,12 @@ static void sba_complete_chained_requests(struct sba_request *req) spin_lock_irqsave(&sba->reqs_lock, flags); - req->state = SBA_REQUEST_STATE_COMPLETED; + req->flags &= ~SBA_REQUEST_STATE_MASK; + req->flags |= SBA_REQUEST_STATE_COMPLETED; list_move_tail(&req->node, &sba->reqs_completed_list); list_for_each_entry(nreq, &req->next, next) { - nreq->state = SBA_REQUEST_STATE_COMPLETED; + nreq->flags &= ~SBA_REQUEST_STATE_MASK; + nreq->flags |= SBA_REQUEST_STATE_COMPLETED; list_move_tail(&nreq->node, &sba->reqs_completed_list); } if (list_empty(&sba->reqs_active_list)) @@ -576,7 +583,7 @@ sba_prep_dma_interrupt(struct dma_chan *dchan, unsigned long flags) * Force fence so that no requests are submitted * until DMA callback for this request is invoked. */ - req->fence = true; + req->flags |= SBA_REQUEST_FENCE; /* Fillup request message */ sba_fillup_interrupt_msg(req, req->cmds, &req->msg); @@ -659,7 +666,8 @@ sba_prep_dma_memcpy_req(struct sba_device *sba, req = sba_alloc_request(sba); if (!req) return NULL; - req->fence = (flags & DMA_PREP_FENCE) ? true : false; + if (flags & DMA_PREP_FENCE) + req->flags |= SBA_REQUEST_FENCE; /* Fillup request message */ sba_fillup_memcpy_msg(req, req->cmds, &req->msg, @@ -796,7 +804,8 @@ sba_prep_dma_xor_req(struct sba_device *sba, req = sba_alloc_request(sba); if (!req) return NULL; - req->fence = (flags & DMA_PREP_FENCE) ? true : false; + if (flags & DMA_PREP_FENCE) + req->flags |= SBA_REQUEST_FENCE; /* Fillup request message */ sba_fillup_xor_msg(req, req->cmds, &req->msg, @@ -1005,7 +1014,8 @@ sba_prep_dma_pq_req(struct sba_device *sba, dma_addr_t off, req = sba_alloc_request(sba); if (!req) return NULL; - req->fence = (flags & DMA_PREP_FENCE) ? true : false; + if (flags & DMA_PREP_FENCE) + req->flags |= SBA_REQUEST_FENCE; /* Fillup request messages */ sba_fillup_pq_msg(req, dmaf_continue(flags), @@ -1258,7 +1268,8 @@ sba_prep_dma_pq_single_req(struct sba_device *sba, dma_addr_t off, req = sba_alloc_request(sba); if (!req) return NULL; - req->fence = (flags & DMA_PREP_FENCE) ? true : false; + if (flags & DMA_PREP_FENCE) + req->flags |= SBA_REQUEST_FENCE; /* Fillup request messages */ sba_fillup_pq_single_msg(req, dmaf_continue(flags), @@ -1425,7 +1436,7 @@ static void sba_receive_message(struct mbox_client *cl, void *msg) req = req->first; /* Update request */ - if (req->state == SBA_REQUEST_STATE_RECEIVED) + if (req->flags & SBA_REQUEST_STATE_RECEIVED) sba_dma_tx_actions(req); else sba_free_chained_requests(req); @@ -1488,11 +1499,10 @@ static int sba_prealloc_channel_resources(struct sba_device *sba) req = &sba->reqs[i]; INIT_LIST_HEAD(&req->node); req->sba = sba; - req->state = SBA_REQUEST_STATE_FREE; + req->flags = SBA_REQUEST_STATE_FREE; INIT_LIST_HEAD(&req->next); req->next_count = 1; atomic_set(&req->next_pending_count, 0); - req->fence = false; req->resp = sba->resp_base + p; req->resp_dma = sba->resp_dma_base + p; p += sba->hw_resp_size; -- 2.7.4