Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933334AbYA2SL2 (ORCPT ); Tue, 29 Jan 2008 13:11:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756070AbYA2SK2 (ORCPT ); Tue, 29 Jan 2008 13:10:28 -0500 Received: from nat-132.atmel.no ([80.232.32.132]:53785 "EHLO relay.atmel.no" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753725AbYA2SKU (ORCPT ); Tue, 29 Jan 2008 13:10:20 -0500 From: Haavard Skinnemoen To: Dan Williams , linux-kernel@vger.kernel.org Cc: Shannon Nelson , David Brownell , kernel@avr32linux.org, "Francis Moreau" , "Paul Mundt" , "Vladimir A. Barinov" , Pierre Ossman , Haavard Skinnemoen Subject: [RFC v2 1/5] dmaengine: Add dma_client parameter to device_alloc_chan_resources Date: Tue, 29 Jan 2008 19:10:09 +0100 Message-Id: <1201630213-31900-2-git-send-email-hskinnemoen@atmel.com> X-Mailer: git-send-email 1.5.3.8 In-Reply-To: <1201630213-31900-1-git-send-email-hskinnemoen@atmel.com> References: <1201630213-31900-1-git-send-email-hskinnemoen@atmel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4280 Lines: 108 A DMA controller capable of doing slave transfers may need to know a few things about the slave when preparing the channel. We don't want to add this information to struct dma_channel since the channel hasn't yet been bound to a client at this point. Instead, pass a reference to the client requesting the channel to the driver's device_alloc_chan_resources hook so that it can pick the necessary information from the dma_client struct by itself. Signed-off-by: Haavard Skinnemoen --- drivers/dma/dmaengine.c | 3 ++- drivers/dma/ioat_dma.c | 5 +++-- drivers/dma/iop-adma.c | 7 ++++--- include/linux/dmaengine.h | 3 ++- 4 files changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 2996523..9b5bed9 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -174,7 +174,8 @@ static void dma_client_chan_alloc(struct dma_client *client) if (!dma_chan_satisfies_mask(chan, client->cap_mask)) continue; - desc = chan->device->device_alloc_chan_resources(chan); + desc = chan->device->device_alloc_chan_resources( + chan, client); if (desc >= 0) { ack = client->event_callback(client, chan, diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c index dff38ac..3e82bfb 100644 --- a/drivers/dma/ioat_dma.c +++ b/drivers/dma/ioat_dma.c @@ -452,7 +452,8 @@ static void ioat2_dma_massage_chan_desc(struct ioat_dma_chan *ioat_chan) * ioat_dma_alloc_chan_resources - returns the number of allocated descriptors * @chan: the channel to be filled out */ -static int ioat_dma_alloc_chan_resources(struct dma_chan *chan) +static int ioat_dma_alloc_chan_resources(struct dma_chan *chan, + struct dma_client *client) { struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan); struct ioat_desc_sw *desc; @@ -1058,7 +1059,7 @@ static int ioat_dma_self_test(struct ioatdma_device *device) dma_chan = container_of(device->common.channels.next, struct dma_chan, device_node); - if (device->common.device_alloc_chan_resources(dma_chan) < 1) { + if (device->common.device_alloc_chan_resources(dma_chan, NULL) < 1) { dev_err(&device->pdev->dev, "selftest cannot allocate chan resource\n"); err = -ENODEV; diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c index 853af18..a784918 100644 --- a/drivers/dma/iop-adma.c +++ b/drivers/dma/iop-adma.c @@ -447,7 +447,8 @@ static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan); static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan); /* returns the number of allocated descriptors */ -static int iop_adma_alloc_chan_resources(struct dma_chan *chan) +static int iop_adma_alloc_chan_resources(struct dma_chan *chan, + struct dma_client *client) { char *hw_desc; int idx; @@ -844,7 +845,7 @@ static int __devinit iop_adma_memcpy_self_test(struct iop_adma_device *device) dma_chan = container_of(device->common.channels.next, struct dma_chan, device_node); - if (iop_adma_alloc_chan_resources(dma_chan) < 1) { + if (iop_adma_alloc_chan_resources(dma_chan, NULL) < 1) { err = -ENODEV; goto out; } @@ -942,7 +943,7 @@ iop_adma_xor_zero_sum_self_test(struct iop_adma_device *device) dma_chan = container_of(device->common.channels.next, struct dma_chan, device_node); - if (iop_adma_alloc_chan_resources(dma_chan) < 1) { + if (iop_adma_alloc_chan_resources(dma_chan, NULL) < 1) { err = -ENODEV; goto out; } diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 586ea37..160835c 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -278,7 +278,8 @@ struct dma_device { int dev_id; struct device *dev; - int (*device_alloc_chan_resources)(struct dma_chan *chan); + int (*device_alloc_chan_resources)(struct dma_chan *chan, + struct dma_client *client); void (*device_free_chan_resources)(struct dma_chan *chan); struct dma_async_tx_descriptor *(*device_prep_dma_memcpy)( -- 1.5.3.8 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/