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Fri, 23 Feb 2024 07:11:04 -0500 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Fri, 23 Feb 2024 07:11:03 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Fri, 23 Feb 2024 07:11:03 -0500 Received: from [127.0.0.1] ([10.44.3.55]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 41NCAb2T032246; Fri, 23 Feb 2024 07:10:54 -0500 From: Nuno Sa Date: Fri, 23 Feb 2024 13:14:00 +0100 Subject: [PATCH v7 2/6] dmaengine: dma-axi-dmac: Implement device_prep_peripheral_dma_vec Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240223-iio-dmabuf-v7-2-78cfaad117b9@analog.com> References: <20240223-iio-dmabuf-v7-0-78cfaad117b9@analog.com> In-Reply-To: <20240223-iio-dmabuf-v7-0-78cfaad117b9@analog.com> To: Vinod Koul , Lars-Peter Clausen , Jonathan Cameron , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Jonathan Corbet , Paul Cercueil CC: Daniel Vetter , Michael Hennerich , , , , , , X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1708690439; l=2329; i=nuno.sa@analog.com; s=20231116; h=from:subject:message-id; bh=K9NGGHhBR6ddEkphP9Mj50ld8zpMDccibebr8OJQUS8=; b=q9t8erGP3tm4CHk+EB1rRHp7mbwg1MVuH7sz48Wd+N5OtI1r6rURxYyBiIES61ioIkKXchAG8 okMK7RF/KOtCdT/rHo485O39rYvGAXsPKawyC89eg57jtStj+rZfvsk X-Developer-Key: i=nuno.sa@analog.com; a=ed25519; pk=3NQwYA013OUYZsmDFBf8rmyyr5iQlxV/9H4/Df83o1E= X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-ORIG-GUID: -4Ozu-lo5duccITIv_lpDdTFPuAtP2j- X-Proofpoint-GUID: -4Ozu-lo5duccITIv_lpDdTFPuAtP2j- X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-22_15,2024-02-23_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 bulkscore=0 spamscore=0 malwarescore=0 adultscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 priorityscore=1501 suspectscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2402120000 definitions=main-2402230088 From: Paul Cercueil Add implementation of the .device_prep_peripheral_dma_vec() callback. Signed-off-by: Paul Cercueil Signed-off-by: Nuno Sa --- drivers/dma/dma-axi-dmac.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 4e339c04fc1e..d03cbf1d28e8 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -620,6 +620,45 @@ static struct axi_dmac_sg *axi_dmac_fill_linear_sg(struct axi_dmac_chan *chan, return sg; } +static struct dma_async_tx_descriptor * +axi_dmac_prep_peripheral_dma_vec(struct dma_chan *c, const struct dma_vec *vecs, + size_t nb, enum dma_transfer_direction direction, + unsigned long prep_flags, unsigned long flags) +{ + struct axi_dmac_chan *chan = to_axi_dmac_chan(c); + struct axi_dmac_desc *desc; + unsigned int num_sgs = 0; + struct axi_dmac_sg *dsg; + size_t i; + + if (direction != chan->direction) + return NULL; + + for (i = 0; i < nb; i++) + num_sgs += DIV_ROUND_UP(vecs[i].len, chan->max_length); + + desc = axi_dmac_alloc_desc(chan, num_sgs); + if (!desc) + return NULL; + + dsg = desc->sg; + + for (i = 0; i < nb; i++) { + if (!axi_dmac_check_addr(chan, vecs[i].addr) || + !axi_dmac_check_len(chan, vecs[i].len)) { + kfree(desc); + return NULL; + } + + dsg = axi_dmac_fill_linear_sg(chan, direction, vecs[i].addr, 1, + vecs[i].len, dsg); + } + + desc->cyclic = false; + + return vchan_tx_prep(&chan->vchan, &desc->vdesc, prep_flags); +} + static struct dma_async_tx_descriptor *axi_dmac_prep_slave_sg( struct dma_chan *c, struct scatterlist *sgl, unsigned int sg_len, enum dma_transfer_direction direction, @@ -1055,6 +1094,7 @@ static int axi_dmac_probe(struct platform_device *pdev) dma_dev->device_tx_status = dma_cookie_status; dma_dev->device_issue_pending = axi_dmac_issue_pending; dma_dev->device_prep_slave_sg = axi_dmac_prep_slave_sg; + dma_dev->device_prep_peripheral_dma_vec = axi_dmac_prep_peripheral_dma_vec; dma_dev->device_prep_dma_cyclic = axi_dmac_prep_dma_cyclic; dma_dev->device_prep_interleaved_dma = axi_dmac_prep_interleaved; dma_dev->device_terminate_all = axi_dmac_terminate_all;