From patchwork Tue Aug 22 09:56:52 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 9914745 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0897660381 for ; Tue, 22 Aug 2017 10:01:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 17C722883F for ; Tue, 22 Aug 2017 10:01:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C9C328856; Tue, 22 Aug 2017 10:01:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.3 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7124F2883F for ; Tue, 22 Aug 2017 10:01:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932522AbdHVJ5u (ORCPT ); Tue, 22 Aug 2017 05:57:50 -0400 Received: from mail-wr0-f176.google.com ([209.85.128.176]:34701 "EHLO mail-wr0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932519AbdHVJ5r (ORCPT ); Tue, 22 Aug 2017 05:57:47 -0400 Received: by mail-wr0-f176.google.com with SMTP id p14so51983338wrg.1 for ; Tue, 22 Aug 2017 02:57:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=IUBkJcQL4snnWizPPyvHYOz3+iDABDYm81UA7C2yhT8=; b=FNmBP9sjpqk8Wf0vQjJna1HZ8EOoBDaKWqOFnQnwB050aP4zygxWBaPt2pgZFpFw6V HE0kAZbHLyXxQpyF8LOkSLOmjdOVsgXcSDTi0DASZAr3GY4FCZCLdXSfmFVQRds9pKQH t84zLvbEc/Cez78wkENaBOqr07VImicbv9W1k= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=IUBkJcQL4snnWizPPyvHYOz3+iDABDYm81UA7C2yhT8=; b=pPo1vQq6+Jdsgx7HxkEII0bGR0UjGJcuY07yrubhBWArnnhv8eL61ajUAP5+9yRZfZ ahy0rWt4DgrX4oRngclj34RT/2vNI87ZaB9OtWCEeQ66tz/ihrFbYsfsGbuL4FaSLwDi uZXHW4XMM41OcxJxTU8jJLk4Cd/wN3n8tE/48dJA30locEaLPM1hRJTEMvjw4whxbjEW 7qIbF2pav05Q+U/pUxlsNcejv3ZuFB3O0DUFQgh/E/GfwB5W7HukBxDkbKus9tup6hqs qEZ6AtQgvRp616w1XolWy5Nb04X7+atX+D82vMfJbI1m/3ezppV7Q+8f/z1ggTb6n+T0 FY+w== X-Gm-Message-State: AHYfb5imu0KANNQ2WQJPHis89zrvCIrplPZILBJmG3OelkyAQDqRfIMx Xu6mLU6/3uTrSdB1 X-Received: by 10.28.217.146 with SMTP id q140mr80070wmg.156.1503395866184; Tue, 22 Aug 2017 02:57:46 -0700 (PDT) Received: from anup-HP-Compaq-8100-Elite-CMT-PC.dhcp.avagotech.net ([192.19.237.250]) by smtp.gmail.com with ESMTPSA id e137sm12257913wma.29.2017.08.22.02.57.40 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 22 Aug 2017 02:57:45 -0700 (PDT) From: Anup Patel To: Vinod Koul , Dan Williams Cc: Florian Fainelli , Scott Branden , Ray Jui , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, Anup Patel Subject: [PATCH v3 03/17] dmaengine: bcm-sba-raid: Common flags for sba_request state and fence Date: Tue, 22 Aug 2017 15:26:52 +0530 Message-Id: <1503395827-19428-4-git-send-email-anup.patel@broadcom.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1503395827-19428-1-git-send-email-anup.patel@broadcom.com> References: <1503395827-19428-1-git-send-email-anup.patel@broadcom.com> Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch merges sba_request state and fence into common sba_request flags. The sba_request flags not only saves memory but it can also be extended in-future without adding new members. We also make each sba_request state as separate bit in sba_request flags to help debugging situations where a sba_request is accidently in two states. 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;