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From: Hauke Mehrtens <hauke@hauke-m.de>
To: Omer Dagan <omer.dagan@tandemg.com>,
	"mcgrof@kernel.org" <mcgrof@kernel.org>
Cc: "backports@vger.kernel.org" <backports@vger.kernel.org>
Subject: Re: [PATCH] add support for pci_alloc_irq_vectors
Date: Mon, 1 Oct 2018 00:04:01 +0200
Message-ID: <0757f4e8-027d-5a7e-8403-19ec1c6cd3a5@hauke-m.de> (raw)
In-Reply-To: <AM0PR02MB365025326A06C3B60C28036093150@AM0PR02MB3650.eurprd02.prod.outlook.com>

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Hi Omer,

On 09/26/2018 09:29 AM, Omer Dagan wrote:
> Hi Hauke 
> I removed the Makefile dependency - you are correct there was no need
> for that
> the whitespace issue was not intentional - corrected in this patch 

You should use whitespace to do some indention. I do not know if you
missed then or if your mail program removed them. I would suggest to
send the patches with "git send-email".

It also looks like your mail is blocked by the mailling list, probably
because it uses html mail.


Hauke

> 
> from: Omer Dagan <omer.dagan@tandemg.com>
> Date: Sun, 16 Sep 2018 17:25:11 +0300
> Subject: [PATCH] add support for pci_alloc_irq_vectors
> 
>     add support for function in kernels under 4.8
>     function is a wrapper around 'pci_enable_msi_block' or
>     'pci_enable_msi_range' depending on the kernel version
>     the min\max number of interrupts was overridden to always use the
>     max number of interrupts which seems correct since it was not
>     supported in the old APIs
> 
> Signed-off-by: Omer Dagan <omer.dagan@tandemg.com>
> ---
>  backport/backport-include/linux/pci.h | 19 +++++++++++++++++++
>  backport/compat/backport-4.8.c        | 25 +++++++++++++++++++++++++
>  2 files changed, 44 insertions(+)
> 
> diff --git a/backport/backport-include/linux/pci.h
> b/backport/backport-include/linux/pci.h
> index 67ac40fc..531f5a47 100644
> --- a/backport/backport-include/linux/pci.h
> +++ b/backport/backport-include/linux/pci.h
> @@ -134,6 +134,25 @@ static inline int pci_vfs_assigned(struct pci_dev *dev)
>  
>  #endif /* LINUX_VERSION_IS_LESS(3,10,0) */
>  
> +#if LINUX_VERSION_IS_LESS(4,8,0)
> +#define pci_alloc_irq_vectors LINUX_BACKPORT(pci_alloc_irq_vectors)
> +#ifdef CONFIG_PCI_MSI
> +int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
> +unsigned int max_vecs, unsigned int flags);
> +#else
> +static inline int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned
> int min_vecs,
> +unsigned int max_vecs, unsigned int flags)
> +{ return -ENOSYS; }
> +#endif
> +#endif
> +
> +#if LINUX_VERSION_IS_LESS(4,8,0)
> +#define pci_free_irq_vectors LINUX_BACKPORT(pci_free_irq_vectors)
> +static inline void pci_free_irq_vectors(struct pci_dev *dev)
> +{
> +}
> +#endif
> +
>  #if LINUX_VERSION_IS_LESS(3,14,0)
>  #define pci_enable_msi_range LINUX_BACKPORT(pci_enable_msi_range)
>  #ifdef CONFIG_PCI_MSI
> diff --git a/backport/compat/backport-4.8.c b/backport/compat/backport-4.8.c
> index 7d056444..706bd067 100644
> --- a/backport/compat/backport-4.8.c
> +++ b/backport/compat/backport-4.8.c
> @@ -9,6 +9,7 @@
>   */
>  #include <linux/usb.h>
>  #include <linux/usb/cdc.h>
> +#include <linux/pci.h>
>  
>  int cdc_parse_cdc_header(struct usb_cdc_parsed_header *hdr,
>  struct usb_interface *intf,
> @@ -144,3 +145,27 @@ next_desc:
>  return cnt;
>  }
>  EXPORT_SYMBOL_GPL(cdc_parse_cdc_header);
> +
> +#if LINUX_VERSION_IS_LESS(4,8,0)
> +int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
> +unsigned int max_vecs, unsigned int flags)
> +{
> +int res;
> +int msi_nvect = max_vecs;
> +
> +if (max_vecs < min_vecs)
> +return -ERANGE;
> +
> +#if LINUX_VERSION_IS_LESS(3,15,0)
> +res = pci_enable_msi_block(dev, msi_nvect);
> +if (res == 0) {
> +return msi_nvect;
> +}
> +#else
> +res = pci_enable_msi_range(dev, msi_nvect, msi_nvect);
> +return msi_nvect;
> +#endif /*LINUX_VERSION_IS_LESS(3,15,0)*/
> +return -ENOSPC;
> +}
> +EXPORT_SYMBOL(pci_alloc_irq_vectors);
> +#endif /*LINUX_VERSION_IS_LESS(4,8,0)*/
> -- 




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  parent reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <AM0PR02MB36506A5694D9DEFB288445F093160@AM0PR02MB3650.eurprd02.prod.outlook.com>
2018-09-25 19:13 ` Subject: " Hauke Mehrtens
     [not found]   ` <AM0PR02MB365025326A06C3B60C28036093150@AM0PR02MB3650.eurprd02.prod.outlook.com>
2018-09-30 22:04     ` Hauke Mehrtens [this message]
2018-10-03  9:18 Omer Dagan

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