linux-kernel - Re: [PATCH 4/6] dmaengine: pl330: add new items for pl330 private data

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Date:	Mon, 4 Jan 2016 16:38:56 +0200
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Wang Hongcheng <annie.wang@....com>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	dmaengine <dmaengine@...r.kernel.org>,
	Borislav Petkov <bp@...en8.de>, Huang Rui <ray.huang@....com>,
	Wan Zongshun <vincent.wan@....com>, Ken Xue <ken.xue@....com>,
	Robin Murphy <robin.murphy@....com>,
	Graeme Gregory <gg@...mlogic.co.uk>, Tony Li <tony.li@....com>,
	Xiangliang Yu <Xiangliang.Yu@....com>
Subject: Re: [PATCH 4/6] dmaengine: pl330: add new items for pl330 private data

On Mon, Jan 4, 2016 at 7:31 AM, Wang Hongcheng <annie.wang@....com> wrote:
> mcbuf_sz means bytes to allocate for MicroCode buffer.
> flags is for irq sharing, default is non-shared, in AMD
> Carrizo, pl330 shares IRQ with its corresponding UART device.
>
> Signed-off-by: Wang Hongcheng <annie.wang@....com>
> ---
>  drivers/acpi/acpi_apd.c    | 17 +++++++++++++++++
>  drivers/dma/pl330.c        |  9 ++++++++-
>  include/linux/amba/pl330.h |  2 ++
>  3 files changed, 27 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
> index 9520daf..4d71a65 100644
> --- a/drivers/acpi/acpi_apd.c
> +++ b/drivers/acpi/acpi_apd.c
> @@ -20,6 +20,9 @@
>  #include <linux/pm.h>
>  #include <linux/amba/bus.h>
>  #include <linux/dma-mapping.h>
> +#include <linux/dmaengine.h>
> +#include <linux/interrupt.h>
> +#include <linux/amba/pl330.h>
>
>  #include "internal.h"
>
> @@ -33,6 +36,14 @@ struct apd_private_data;
>  #define ACPI_APD_SYSFS BIT(0)
>  #define ACPI_APD_PM    BIT(1)
>
> +static u8 peri_id[2] = { 0, 1 };
> +
> +static struct dma_pl330_platdata amd_pl330 = {
> +       .nr_valid_peri = 2,
> +       .peri_id = peri_id,
> +       .mcbuf_sz = 0,
> +       .flags = IRQF_SHARED,
> +};
>  /**
>   * struct apd_device_desc - a descriptor for apd device
>   * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
> @@ -150,6 +161,12 @@ static int acpi_apd_setup_quirks(struct apd_private_data *pdata)
>                 goto amba_register_err;
>
>         kfree(resource);
> +
> +       dma_cap_set(DMA_MEMCPY, amd_pl330.cap_mask);
> +       dma_cap_set(DMA_SLAVE, amd_pl330.cap_mask);
> +       dma_cap_set(DMA_CYCLIC, amd_pl330.cap_mask);
> +       dma_cap_set(DMA_PRIVATE, amd_pl330.cap_mask);
> +
>         return 0;
>
>  amba_register_err:
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index 17ee758..5e5fb46 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -26,6 +26,8 @@
>  #include <linux/scatterlist.h>
>  #include <linux/of.h>
>  #include <linux/of_dma.h>
> +#include <linux/acpi.h>
> +#include <linux/acpi_dma.h>
>  #include <linux/err.h>
>  #include <linux/pm_runtime.h>
>
> @@ -488,6 +490,9 @@ struct pl330_dmac {
>         /* Peripheral channels connected to this DMAC */
>         unsigned int num_peripherals;
>         struct dma_pl330_chan *peripherals; /* keep at end */
> +
> +       /*IRQ register flags */

+Space '/* '

> +       unsigned int flags;

irq_flags

>  };
>
>  struct dma_pl330_desc {
> @@ -2800,6 +2805,8 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
>
>         pl330->mcbufsz = pdat ? pdat->mcbuf_sz : 0;
>
> +       pl330->flags = pdat ? pdat->flags : IRQF_TRIGGER_NONE;
> +
>         res = &adev->res;
>         pl330->base = devm_ioremap_resource(&adev->dev, res);
>         if (IS_ERR(pl330->base))
> @@ -2811,7 +2818,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
>                 irq = adev->irq[i];
>                 if (irq) {
>                         ret = devm_request_irq(&adev->dev, irq,
> -                                              pl330_irq_handler, 0,
> +                                              pl330_irq_handler, pl330->flags,
>                                                dev_name(&adev->dev), pl330);
>                         if (ret)
>                                 return ret;
> diff --git a/include/linux/amba/pl330.h b/include/linux/amba/pl330.h
> index fe93758..cdc80f0 100644
> --- a/include/linux/amba/pl330.h
> +++ b/include/linux/amba/pl330.h
> @@ -29,6 +29,8 @@ struct dma_pl330_platdata {
>         dma_cap_mask_t cap_mask;
>         /* Bytes to allocate for MC buffer */
>         unsigned mcbuf_sz;
> +       /*flags for irq sharing, default is non-shared*/

Spaces '/* */'

> +       unsigned flags;

irq_flags

>  };

>
>  extern bool pl330_filter(struct dma_chan *chan, void *param);
> --
> 1.9.1
>



-- 
With Best Regards,
Andy Shevchenko
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