From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Vinod Koul <vkoul@kernel.org>,
dmaengine@vger.kernel.org, Viresh Kumar <vireshk@kernel.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 01/12] dmaengine: acpi: Set up DMA mask based on CSRT
Date: Tue, 6 Aug 2019 12:40:43 +0300 [thread overview]
Message-ID: <20190806094054.64871-1-andriy.shevchenko@linux.intel.com> (raw)
CSRT has an information about address width, which is supported by
the certain DMA controller.
Use information from CSRT to set up DMA mask for shared controller.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/dma/acpi-dma.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c
index 30243f5c0710..4d66ee059808 100644
--- a/drivers/dma/acpi-dma.c
+++ b/drivers/dma/acpi-dma.c
@@ -10,6 +10,7 @@
*/
#include <linux/device.h>
+#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/kernel.h>
@@ -82,6 +83,12 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
if (si->base_request_line == 0 && si->num_handshake_signals == 0)
return 0;
+ /* Set up DMA mask based on value from CSRT */
+ ret = dma_coerce_mask_and_coherent(&adev->dev,
+ DMA_BIT_MASK(si->dma_address_width));
+ if (ret)
+ return 0;
+
adma->base_request_line = si->base_request_line;
adma->end_request_line = si->base_request_line +
si->num_handshake_signals - 1;
--
2.20.1
next reply other threads:[~2019-08-06 9:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 9:40 Andy Shevchenko [this message]
2019-08-06 9:40 ` [PATCH v1 02/12] dmaengine: acpi: Move index to struct acpi_dma_spec Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 03/12] dmaengine: acpi: Provide consumer device to ->acpi_dma_xlate() Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 04/12] dmaengine: acpi: Add kernel doc parameter descriptions Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 05/12] dmaengine: dw: Export struct dw_dma_chip_pdata for wider use Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 06/12] dmaengine: dw: platform: Use struct dw_dma_chip_pdata Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 07/12] dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake Andy Shevchenko
2019-08-14 14:44 ` Andy Shevchenko
2019-08-20 11:13 ` Vinod Koul
2019-08-06 9:40 ` [PATCH v1 08/12] dmaengine: dw: platform: Use devm_platform_ioremap_resource() Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 09/12] dmaengine: dw: platform: Switch to acpi_dma_controller_register() Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 10/12] dmaengine: dw: platform: Move handle check to dw_dma_acpi_controller_register() Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 11/12] dmaengine: dw: platform: Split ACPI helpers to separate module Andy Shevchenko
2019-08-06 9:40 ` [PATCH v1 12/12] dmaengine: dw: platform: Split OF " Andy Shevchenko
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