| Message ID | 1375102331-23905-9-git-send-email-jeffrey.t.kirsher@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Mon, Jul 29, 2013 at 6:52 AM, Jeff Kirsher <jeffrey.t.kirsher@intel.com> wrote: > From: Jacob Keller <jacob.e.keller@intel.com> > > pcie_link_speed and pcix_bus_speed are arrays used by probe.c to correctly > convert lnksta register values into the pci_bus_speed enum. These static arrays > are useful outside probe for this purpose. This patch makes these defines into > const arrays and exposes them with an extern header in linux/include/pci.h > > Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> > Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> > Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> > --- > drivers/pci/probe.c | 4 ++-- > include/linux/pci.h | 3 +++ > 2 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index 46ada5c..496c5b0 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -513,7 +513,7 @@ static struct pci_host_bridge *pci_alloc_host_bridge(struct pci_bus *b) > return bridge; > } > > -static unsigned char pcix_bus_speed[] = { > +const unsigned char pcix_bus_speed[] = { > PCI_SPEED_UNKNOWN, /* 0 */ > PCI_SPEED_66MHz_PCIX, /* 1 */ > PCI_SPEED_100MHz_PCIX, /* 2 */ > @@ -532,7 +532,7 @@ static unsigned char pcix_bus_speed[] = { > PCI_SPEED_133MHz_PCIX_533 /* F */ > }; > > -static unsigned char pcie_link_speed[] = { > +const unsigned char pcie_link_speed[] = { > PCI_SPEED_UNKNOWN, /* 0 */ > PCIE_SPEED_2_5GT, /* 1 */ > PCIE_SPEED_5_0GT, /* 2 */ > diff --git a/include/linux/pci.h b/include/linux/pci.h > index 0fd1f15..95ff993 100644 > --- a/include/linux/pci.h > +++ b/include/linux/pci.h > @@ -120,6 +120,9 @@ typedef int __bitwise pci_power_t; > /* Remember to update this when the list above changes! */ > extern const char *pci_power_names[]; > > +extern const unsigned char pcix_bus_speed[]; > +extern const unsigned char pcie_link_speed[]; As far as I can tell, you didn't actually add anything that uses pcix_bus_speed[]. You added a pcie_link_speed[] use only in drivers/pci/pci.c; maybe this extern declaration could go in drivers/pci/pci.h to limit its visibility? If you update this patch, note that we conventionally capitalize "PCI: Expose ..." in the changelog summary, e.g., "git log --oneline drivers/pci". > static inline const char *pci_power_name(pci_power_t state) > { > return pci_power_names[1 + (int) state]; > -- > 1.7.11.7 > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, 2013-07-29 at 12:44 -0600, Bjorn Helgaas wrote: > On Mon, Jul 29, 2013 at 6:52 AM, Jeff Kirsher > <jeffrey.t.kirsher@intel.com> wrote: > > From: Jacob Keller <jacob.e.keller@intel.com> > > > > pcie_link_speed and pcix_bus_speed are arrays used by probe.c to correctly > > convert lnksta register values into the pci_bus_speed enum. These static arrays > > are useful outside probe for this purpose. This patch makes these defines into > > const arrays and exposes them with an extern header in linux/include/pci.h > > > > Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> > > Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> > > Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> > > --- > > drivers/pci/probe.c | 4 ++-- > > include/linux/pci.h | 3 +++ > > 2 files changed, 5 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > > index 46ada5c..496c5b0 100644 > > --- a/drivers/pci/probe.c > > +++ b/drivers/pci/probe.c > > @@ -513,7 +513,7 @@ static struct pci_host_bridge *pci_alloc_host_bridge(struct pci_bus *b) > > return bridge; > > } > > > > -static unsigned char pcix_bus_speed[] = { > > +const unsigned char pcix_bus_speed[] = { > > PCI_SPEED_UNKNOWN, /* 0 */ > > PCI_SPEED_66MHz_PCIX, /* 1 */ > > PCI_SPEED_100MHz_PCIX, /* 2 */ > > @@ -532,7 +532,7 @@ static unsigned char pcix_bus_speed[] = { > > PCI_SPEED_133MHz_PCIX_533 /* F */ > > }; > > > > -static unsigned char pcie_link_speed[] = { > > +const unsigned char pcie_link_speed[] = { > > PCI_SPEED_UNKNOWN, /* 0 */ > > PCIE_SPEED_2_5GT, /* 1 */ > > PCIE_SPEED_5_0GT, /* 2 */ > > diff --git a/include/linux/pci.h b/include/linux/pci.h > > index 0fd1f15..95ff993 100644 > > --- a/include/linux/pci.h > > +++ b/include/linux/pci.h > > @@ -120,6 +120,9 @@ typedef int __bitwise pci_power_t; > > /* Remember to update this when the list above changes! */ > > extern const char *pci_power_names[]; > > > > +extern const unsigned char pcix_bus_speed[]; > > +extern const unsigned char pcie_link_speed[]; > > As far as I can tell, you didn't actually add anything that uses > pcix_bus_speed[]. > I mostly added this for consistency... > You added a pcie_link_speed[] use only in drivers/pci/pci.c; maybe > this extern declaration could go in drivers/pci/pci.h to limit its > visibility? Pretty sure I use the pcie_link_speed in the ixgbe driver by including the linux/pci.h header... Check patch 11/15 of this series where I actually use the values, so it would need to be in the linux/pci.h header. > > If you update this patch, note that we conventionally capitalize "PCI: > Expose ..." in the changelog summary, e.g., "git log --oneline > drivers/pci". Oh. good to know, I will keep that in mind for future. > > > static inline const char *pci_power_name(pci_power_t state) > > { > > return pci_power_names[1 + (int) state]; > > -- > > 1.7.11.7 > > Thanks, Jake
On Mon, Jul 29, 2013 at 3:03 PM, Keller, Jacob E <jacob.e.keller@intel.com> wrote: > On Mon, 2013-07-29 at 12:44 -0600, Bjorn Helgaas wrote: >> On Mon, Jul 29, 2013 at 6:52 AM, Jeff Kirsher >> <jeffrey.t.kirsher@intel.com> wrote: >> > From: Jacob Keller <jacob.e.keller@intel.com> >> > >> > pcie_link_speed and pcix_bus_speed are arrays used by probe.c to correctly >> > convert lnksta register values into the pci_bus_speed enum. These static arrays >> > are useful outside probe for this purpose. This patch makes these defines into >> > const arrays and exposes them with an extern header in linux/include/pci.h >> > >> > Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> >> > Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> >> > Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> >> > --- >> > drivers/pci/probe.c | 4 ++-- >> > include/linux/pci.h | 3 +++ >> > 2 files changed, 5 insertions(+), 2 deletions(-) >> > >> > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c >> > index 46ada5c..496c5b0 100644 >> > --- a/drivers/pci/probe.c >> > +++ b/drivers/pci/probe.c >> > @@ -513,7 +513,7 @@ static struct pci_host_bridge *pci_alloc_host_bridge(struct pci_bus *b) >> > return bridge; >> > } >> > >> > -static unsigned char pcix_bus_speed[] = { >> > +const unsigned char pcix_bus_speed[] = { >> > PCI_SPEED_UNKNOWN, /* 0 */ >> > PCI_SPEED_66MHz_PCIX, /* 1 */ >> > PCI_SPEED_100MHz_PCIX, /* 2 */ >> > @@ -532,7 +532,7 @@ static unsigned char pcix_bus_speed[] = { >> > PCI_SPEED_133MHz_PCIX_533 /* F */ >> > }; >> > >> > -static unsigned char pcie_link_speed[] = { >> > +const unsigned char pcie_link_speed[] = { >> > PCI_SPEED_UNKNOWN, /* 0 */ >> > PCIE_SPEED_2_5GT, /* 1 */ >> > PCIE_SPEED_5_0GT, /* 2 */ >> > diff --git a/include/linux/pci.h b/include/linux/pci.h >> > index 0fd1f15..95ff993 100644 >> > --- a/include/linux/pci.h >> > +++ b/include/linux/pci.h >> > @@ -120,6 +120,9 @@ typedef int __bitwise pci_power_t; >> > /* Remember to update this when the list above changes! */ >> > extern const char *pci_power_names[]; >> > >> > +extern const unsigned char pcix_bus_speed[]; >> > +extern const unsigned char pcie_link_speed[]; >> >> As far as I can tell, you didn't actually add anything that uses >> pcix_bus_speed[]. >> > > I mostly added this for consistency... > >> You added a pcie_link_speed[] use only in drivers/pci/pci.c; maybe >> this extern declaration could go in drivers/pci/pci.h to limit its >> visibility? > > Pretty sure I use the pcie_link_speed in the ixgbe driver by including > the linux/pci.h header... Check patch 11/15 of this series where I > actually use the values, so it would need to be in the linux/pci.h > header. I'm not sure I was copied on patch 11/15. I assume it might be "ixgbe: call pcie_get_mimimum_link to check if device has enough bandwidth", and I see that patch uses the pci_bus_speed enum, so the enum definitely needs to be in include/linux/pci.h. But I don't see the pcie_link_speed[] reference. I did fetch your git tree and searched the diffs themselves but the only use I saw was in pcie_get_minimum_link() in drivers/pci/pci.c. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 46ada5c..496c5b0 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -513,7 +513,7 @@ static struct pci_host_bridge *pci_alloc_host_bridge(struct pci_bus *b) return bridge; } -static unsigned char pcix_bus_speed[] = { +const unsigned char pcix_bus_speed[] = { PCI_SPEED_UNKNOWN, /* 0 */ PCI_SPEED_66MHz_PCIX, /* 1 */ PCI_SPEED_100MHz_PCIX, /* 2 */ @@ -532,7 +532,7 @@ static unsigned char pcix_bus_speed[] = { PCI_SPEED_133MHz_PCIX_533 /* F */ }; -static unsigned char pcie_link_speed[] = { +const unsigned char pcie_link_speed[] = { PCI_SPEED_UNKNOWN, /* 0 */ PCIE_SPEED_2_5GT, /* 1 */ PCIE_SPEED_5_0GT, /* 2 */ diff --git a/include/linux/pci.h b/include/linux/pci.h index 0fd1f15..95ff993 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -120,6 +120,9 @@ typedef int __bitwise pci_power_t; /* Remember to update this when the list above changes! */ extern const char *pci_power_names[]; +extern const unsigned char pcix_bus_speed[]; +extern const unsigned char pcie_link_speed[]; + static inline const char *pci_power_name(pci_power_t state) { return pci_power_names[1 + (int) state];