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[82.56.173.172]) by smtp.gmail.com with ESMTPSA id t5-20020a170906064500b00a45ff821e09sm4778473ejb.150.2024.03.13.07.09.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Mar 2024 07:09:02 -0700 (PDT) From: Andrea della Porta To: Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Ray Jui , Scott Branden , Broadcom internal kernel review list , Saenz Julienne , dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, dave.stevenson@raspberrypi.com Cc: Phil Elwell , Maxime Ripard , Stefan Wahren , Dom Cobley , Andrea della Porta Subject: [PATCH v2 11/15] dmaengine: bcm2835: pass dma_chan to generic functions Date: Wed, 13 Mar 2024 15:08:36 +0100 Message-ID: <2dedf0428cbc5229ea563a571d297a64c8e09c03.1710226514.git.andrea.porta@suse.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In preparation to support more platforms pass the dma_chan to the generic functions. This provides access to the DMA device and possible platform specific data. Signed-off-by: Stefan Wahren Signed-off-by: Andrea della Porta --- drivers/dma/bcm2835-dma.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c index 03d97312a3f8..88ae5d05402e 100644 --- a/drivers/dma/bcm2835-dma.c +++ b/drivers/dma/bcm2835-dma.c @@ -308,13 +308,14 @@ static void bcm2835_dma_desc_free(struct virt_dma_des= c *vd) bcm2835_dma_free_cb_chain(container_of(vd, struct bcm2835_desc, vd)); } =20 -static bool bcm2835_dma_create_cb_set_length(struct bcm2835_chan *chan, +static bool bcm2835_dma_create_cb_set_length(struct dma_chan *chan, struct bcm2835_dma_cb *control_block, size_t len, size_t period_len, size_t *total_len) { - size_t max_len =3D bcm2835_dma_max_frame_length(chan); + struct bcm2835_chan *c =3D to_bcm2835_dma_chan(chan); + size_t max_len =3D bcm2835_dma_max_frame_length(c); =20 /* set the length taking lite-channel limitations into account */ control_block->length =3D min_t(u32, len, max_len); @@ -441,7 +442,7 @@ static struct bcm2835_desc *bcm2835_dma_create_cb_chain( if (buf_len) { /* calculate length honoring period_length */ if (bcm2835_dma_create_cb_set_length( - c, control_block, + chan, control_block, len, period_len, &total_len)) { /* add extrainfo bits in info */ control_block->info |=3D extrainfo; @@ -508,8 +509,9 @@ static void bcm2835_dma_fill_cb_chain_with_sg( } } =20 -static void bcm2835_dma_abort(struct bcm2835_chan *c) +static void bcm2835_dma_abort(struct dma_chan *chan) { + struct bcm2835_chan *c =3D to_bcm2835_dma_chan(chan); void __iomem *chan_base =3D c->chan_base; long timeout =3D 100; =20 @@ -550,8 +552,9 @@ static void bcm2835_dma_abort(struct bcm2835_chan *c) writel(BCM2835_DMA_RESET, chan_base + BCM2835_DMA_CS); } =20 -static void bcm2835_dma_start_desc(struct bcm2835_chan *c) +static void bcm2835_dma_start_desc(struct dma_chan *chan) { + struct bcm2835_chan *c =3D to_bcm2835_dma_chan(chan); struct virt_dma_desc *vd =3D vchan_next_desc(&c->vc); =20 if (!vd) { @@ -570,7 +573,8 @@ static void bcm2835_dma_start_desc(struct bcm2835_chan = *c) =20 static irqreturn_t bcm2835_dma_callback(int irq, void *data) { - struct bcm2835_chan *c =3D data; + struct dma_chan *chan =3D data; + struct bcm2835_chan *c =3D to_bcm2835_dma_chan(chan); struct bcm2835_desc *d; unsigned long flags; =20 @@ -604,7 +608,7 @@ static irqreturn_t bcm2835_dma_callback(int irq, void *= data) vchan_cyclic_callback(&d->vd); } else if (!readl(c->chan_base + BCM2835_DMA_ADDR)) { vchan_cookie_complete(&c->desc->vd); - bcm2835_dma_start_desc(c); + bcm2835_dma_start_desc(chan); } } =20 @@ -632,7 +636,7 @@ static int bcm2835_dma_alloc_chan_resources(struct dma_= chan *chan) } =20 return request_irq(c->irq_number, bcm2835_dma_callback, - c->irq_flags, "DMA IRQ", c); + c->irq_flags, "DMA IRQ", chan); } =20 static void bcm2835_dma_free_chan_resources(struct dma_chan *chan) @@ -721,7 +725,7 @@ static void bcm2835_dma_issue_pending(struct dma_chan *= chan) =20 spin_lock_irqsave(&c->vc.lock, flags); if (vchan_issue_pending(&c->vc) && !c->desc) - bcm2835_dma_start_desc(c); + bcm2835_dma_start_desc(chan); =20 spin_unlock_irqrestore(&c->vc.lock, flags); } @@ -885,7 +889,7 @@ static int bcm2835_dma_terminate_all(struct dma_chan *c= han) if (c->desc) { vchan_terminate_vdesc(&c->desc->vd); c->desc =3D NULL; - bcm2835_dma_abort(c); + bcm2835_dma_abort(chan); } =20 vchan_get_all_descriptors(&c->vc, &head); --=20 2.35.3