[dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[Ferruh Yigit]

To get pci_dev and vf number from dev, benefit from
existing macros in pci.h

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
 lib/librte_eal/linuxapp/igb_uio/igb_uio.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index 87293b8..9f46665 100644
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -66,8 +66,7 @@ static ssize_t
 show_max_vfs(struct device *dev, struct device_attribute *attr,
 	     char *buf)
 {
-	return snprintf(buf, 10, "%u\n",
-			pci_num_vf(container_of(dev, struct pci_dev, dev)));
+	return snprintf(buf, 10, "%u\n", dev_num_vf(dev));
 }
 
 static ssize_t
@@ -76,7 +75,7 @@ store_max_vfs(struct device *dev, struct device_attribute *attr,
 {
 	int err = 0;
 	unsigned long max_vfs;
-	struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
+	struct pci_dev *pdev = to_pci_dev(dev);
 
 	if (0 != kstrtoul(buf, 0, &max_vfs))
 		return -EINVAL;
@@ -95,7 +94,7 @@ store_max_vfs(struct device *dev, struct device_attribute *attr,
 static ssize_t
 show_extended_tag(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	struct pci_dev *pci_dev = container_of(dev, struct pci_dev, dev);
+	struct pci_dev *pci_dev = to_pci_dev(dev);
 	uint32_t val = 0;
 
 	pci_read_config_dword(pci_dev, PCI_DEV_CAP_REG, &val);
@@ -116,7 +115,7 @@ store_extended_tag(struct device *dev,
 		   const char *buf,
 		   size_t count)
 {
-	struct pci_dev *pci_dev = container_of(dev, struct pci_dev, dev);
+	struct pci_dev *pci_dev = to_pci_dev(dev);
 	uint32_t val = 0, enable;
 
 	if (strncmp(buf, "on", 2) == 0)
@@ -153,7 +152,7 @@ show_max_read_request_size(struct device *dev,
 			   struct device_attribute *attr,
 			   char *buf)
 {
-	struct pci_dev *pci_dev = container_of(dev, struct pci_dev, dev);
+	struct pci_dev *pci_dev = to_pci_dev(dev);
 	int val = pcie_get_readrq(pci_dev);
 
 	return snprintf(buf, PCI_SYS_FILE_BUF_SIZE, "%d\n", val);
@@ -165,7 +164,7 @@ store_max_read_request_size(struct device *dev,
 			    const char *buf,
 			    size_t count)
 {
-	struct pci_dev *pci_dev = container_of(dev, struct pci_dev, dev);
+	struct pci_dev *pci_dev = to_pci_dev(dev);
 	unsigned long size = 0;
 	int ret;
 
-- 
1.9.3

Re: [dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[David Marchand]

Hello Ferruh,

On Thu, Sep 10, 2015 at 6:01 PM, Ferruh Yigit <ferruh.yigit@intel.com>
wrote:

> To get pci_dev and vf number from dev, benefit from
> existing macros in pci.h
>
> Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
>

Correct me if I am wrong but you might need to provide wrappers for kernel
version <= 2.6.34 (or something that indicates availability of those).

Please, can you confirm this is just a cleanup and you are not fixing
anything ?


Thanks.
-- 
David Marchand

Re: [dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[Ferruh Yigit]

Hi David,
> Hello Ferruh,
> 
> On Thu, Sep 10, 2015 at 6:01 PM, Ferruh Yigit <ferruh.yigit@intel.com>
> wrote:
> 
> > To get pci_dev and vf number from dev, benefit from
> > existing macros in pci.h
> >
> > Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
> >
> 
> Correct me if I am wrong but you might need to provide wrappers for kernel
> version <= 2.6.34 (or something that indicates availability of those).

Correct, those macros available after kernel version >= 2.6.34.
If these is any chance that one using older kernel than this version,
instead of having wrappers I am for keeping existing implementation and
drop this patch.

> 
> Please, can you confirm this is just a cleanup and you are not fixing
> anything ?

Just cleanup.

Thanks,
ferruh

Re: [dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[Thomas Monjalon]

2015-09-10 20:33, Ferruh Yigit:
> > On Thu, Sep 10, 2015 at 6:01 PM, Ferruh Yigit <ferruh.yigit@intel.com>
> > wrote:
> > 
> > > To get pci_dev and vf number from dev, benefit from
> > > existing macros in pci.h
> > >
> > > Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
> > 
> > Correct me if I am wrong but you might need to provide wrappers for kernel
> > version <= 2.6.34 (or something that indicates availability of those).
> 
> Correct, those macros available after kernel version >= 2.6.34.
> If these is any chance that one using older kernel than this version,
> instead of having wrappers I am for keeping existing implementation and
> drop this patch.

Why should we support kernel older than 2.6.34?
Do we need to update doc/guides/rel_notes/supported_os.rst?

Re: [dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[Mcnamara, John]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas Monjalon
> Sent: Friday, September 11, 2015 9:11 AM
> To: dev@dpdk.org; Yigit, Ferruh; David Marchand
> Subject: Re: [dpdk-dev] [PATCH] igb_uio: use existing PCI macros
> 
> 2015-09-10 20:33, Ferruh Yigit:
> > > On Thu, Sep 10, 2015 at 6:01 PM, Ferruh Yigit
> > > <ferruh.yigit@intel.com>
> > > wrote:
> > >

> > Correct, those macros available after kernel version >= 2.6.34.
> > ...
> 
> Why should we support kernel older than 2.6.34?
> Do we need to update doc/guides/rel_notes/supported_os.rst?

If we do then  we should update he Linux Getting Started guide which says:

    Required:

    Kernel version >= 2.6.33

    http://dpdk.org/doc/guides/linux_gsg/sys_reqs.html#system-software

And probably drop the section below itabout patching older kernels.

John.
-- 

Re: [dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[Thomas Monjalon]

2015-09-11 08:31, Mcnamara, John:
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas Monjalon
> > 2015-09-10 20:33, Ferruh Yigit:
> > > Correct, those macros available after kernel version >= 2.6.34.
> > > ...
> > 
> > Why should we support kernel older than 2.6.34?
> > Do we need to update doc/guides/rel_notes/supported_os.rst?
> 
> If we do then  we should update he Linux Getting Started guide which says:
> 
>     Required:
> 
>     Kernel version >= 2.6.33
> 
>     http://dpdk.org/doc/guides/linux_gsg/sys_reqs.html#system-software
> 
> And probably drop the section below itabout patching older kernels.

Anyone against dropping 2.6.33 support?

Re: [dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[Thomas Monjalon]

2015-09-10 17:01, Ferruh Yigit:
> To get pci_dev and vf number from dev, benefit from
> existing macros in pci.h
> 
> Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>

Applied, thanks

Re: [dpdk-dev] [PATCH] igb_uio: use existing PCI macros

[Thomas Monjalon]

2015-10-25 18:51, Thomas Monjalon:
> 2015-09-11 08:31, Mcnamara, John:
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas Monjalon
> > > 2015-09-10 20:33, Ferruh Yigit:
> > > > Correct, those macros available after kernel version >= 2.6.34.
> > > > ...
> > > 
> > > Why should we support kernel older than 2.6.34?
> > > Do we need to update doc/guides/rel_notes/supported_os.rst?
> > 
> > If we do then  we should update he Linux Getting Started guide which says:
> > 
> >     Required:
> > 
> >     Kernel version >= 2.6.33
> > 
> >     http://dpdk.org/doc/guides/linux_gsg/sys_reqs.html#system-software
> > 
> > And probably drop the section below itabout patching older kernels.
> 
> Anyone against dropping 2.6.33 support?

This patch is now applied and is the first breaking the Linux 2.6.33 support.
John, are you OK to update the doc?
Thanks