| Message ID | 1341935655-5381-5-git-send-email-jiang.liu@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Tue, Jul 10, 2012 at 9:54 AM, Jiang Liu <liuj97@gmail.com> wrote: > From: Jiang Liu <jiang.liu@huawei.com> > > Move pcie_cap_has_*() macros to include/linux/pci.h, so they can be shared. > Since pcie_flags was introduced, rework these macros to take a struct pci_dev * > and use pcie_flags insead of type and flags. > > Signed-off-by: Jiang Liu <liuj97@gmail.com> > Signed-off-by: Yijing Wang <wangyijing@huawei.com> > --- > drivers/pci/pci.c | 50 ++++++++++++-------------------------------------- > include/linux/pci.h | 43 +++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 55 insertions(+), 38 deletions(-) > > diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c > index 28eb55b..4c6ab70 100644 > --- a/drivers/pci/pci.c > +++ b/drivers/pci/pci.c > @@ -272,15 +272,11 @@ int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap) > */ > static int pci_pcie_cap2(struct pci_dev *dev) > { > - u16 flags; > int pos; > > pos = pci_pcie_cap(dev); > - if (pos) { > - pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags); > - if ((flags & PCI_EXP_FLAGS_VERS) < 2) > - pos = 0; > - } > + if (pos && !pci_pcie_cap_has_cap2(dev)) > + pos = 0; > > return pos; > } > @@ -854,21 +850,6 @@ EXPORT_SYMBOL(pci_choose_state); > > #define PCI_EXP_SAVE_REGS 7 > > -#define pcie_cap_has_devctl(type, flags) 1 > -#define pcie_cap_has_lnkctl(type, flags) \ > - ((flags & PCI_EXP_FLAGS_VERS) > 1 || \ > - (type == PCI_EXP_TYPE_ROOT_PORT || \ > - type == PCI_EXP_TYPE_ENDPOINT || \ > - type == PCI_EXP_TYPE_LEG_END)) > -#define pcie_cap_has_sltctl(type, flags) \ > - ((flags & PCI_EXP_FLAGS_VERS) > 1 || \ > - ((type == PCI_EXP_TYPE_ROOT_PORT) || \ > - (type == PCI_EXP_TYPE_DOWNSTREAM && \ > - (flags & PCI_EXP_FLAGS_SLOT)))) > -#define pcie_cap_has_rtctl(type, flags) \ > - ((flags & PCI_EXP_FLAGS_VERS) > 1 || \ > - (type == PCI_EXP_TYPE_ROOT_PORT || \ > - type == PCI_EXP_TYPE_RC_EC)) > > static struct pci_cap_saved_state *pci_find_saved_cap( > struct pci_dev *pci_dev, char cap) > @@ -885,10 +866,9 @@ static struct pci_cap_saved_state *pci_find_saved_cap( > > static int pci_save_pcie_state(struct pci_dev *dev) > { > - int type, pos, i = 0; > + int pos, i = 0; > struct pci_cap_saved_state *save_state; > u16 *cap; > - u16 flags; > > pos = pci_pcie_cap(dev); > if (!pos) > @@ -901,16 +881,14 @@ static int pci_save_pcie_state(struct pci_dev *dev) > } > cap = (u16 *)&save_state->cap.data[0]; > > - pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags); > > - type = pci_pcie_type(dev); > - if (pcie_cap_has_devctl(type, flags)) > + if (pci_pcie_cap_has_devctl(dev)) > pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &cap[i++]); > - if (pcie_cap_has_lnkctl(type, flags)) > + if (pci_pcie_cap_has_lnkctl(dev)) > pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &cap[i++]); > - if (pcie_cap_has_sltctl(type, flags)) > + if (pci_pcie_cap_has_sltctl(dev)) > pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]); > - if (pcie_cap_has_rtctl(type, flags)) > + if (pci_pcie_cap_has_rtctl(dev)) > pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]); > > pos = pci_pcie_cap2(dev); > @@ -925,10 +903,9 @@ static int pci_save_pcie_state(struct pci_dev *dev) > > static void pci_restore_pcie_state(struct pci_dev *dev) > { > - int i = 0, pos, type; > + int i = 0, pos; > struct pci_cap_saved_state *save_state; > u16 *cap; > - u16 flags; > > save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP); > pos = pci_find_capability(dev, PCI_CAP_ID_EXP); > @@ -936,16 +913,13 @@ static void pci_restore_pcie_state(struct pci_dev *dev) > return; > cap = (u16 *)&save_state->cap.data[0]; > > - pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags); > - > - type = pci_pcie_type(dev); > - if (pcie_cap_has_devctl(type, flags)) > + if (pci_pcie_cap_has_devctl(dev)) > pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, cap[i++]); > - if (pcie_cap_has_lnkctl(type, flags)) > + if (pci_pcie_cap_has_lnkctl(dev)) > pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, cap[i++]); > - if (pcie_cap_has_sltctl(type, flags)) > + if (pci_pcie_cap_has_sltctl(dev)) > pci_write_config_word(dev, pos + PCI_EXP_SLTCTL, cap[i++]); > - if (pcie_cap_has_rtctl(type, flags)) > + if (pci_pcie_cap_has_rtctl(dev)) > pci_write_config_word(dev, pos + PCI_EXP_RTCTL, cap[i++]); > > pos = pci_pcie_cap2(dev); > diff --git a/include/linux/pci.h b/include/linux/pci.h > index 1837354..346b2d9 100644 > --- a/include/linux/pci.h > +++ b/include/linux/pci.h > @@ -1659,6 +1659,49 @@ static inline int pci_pcie_type(const struct pci_dev *dev) > return (dev->pcie_flags & PCI_EXP_FLAGS_TYPE) >> 4; > } > > +static inline int pci_pcie_cap_version(const struct pci_dev *pdev) > +{ > + return pdev->pcie_flags & PCI_EXP_FLAGS_VERS; > +} > + > +static inline int pci_pcie_cap_has_cap2(const struct pci_dev *pdev) > +{ > + return pci_pcie_cap_version(pdev) > 1; > +} Do we need these (pci_pcie_cap_version() and pci_pcie_cap_has_cap2()) anywhere other than maybe in pci/access.c? I hope not. > + > +static inline bool pci_pcie_cap_has_devctl(const struct pci_dev *pdev) > +{ > + return true; > +} > + > +static inline bool pci_pcie_cap_has_lnkctl(const struct pci_dev *pdev) > +{ > + int type = pci_pcie_type(pdev); > + > + return pci_pcie_cap_version(pdev) > 1 || > + type == PCI_EXP_TYPE_ROOT_PORT || > + type == PCI_EXP_TYPE_ENDPOINT || > + type == PCI_EXP_TYPE_LEG_END; > +} > + > +static inline bool pci_pcie_cap_has_sltctl(const struct pci_dev *pdev) > +{ > + int type = pci_pcie_type(pdev); > + > + return pci_pcie_cap_version(pdev) > 1 || > + type == PCI_EXP_TYPE_ROOT_PORT || > + (type == PCI_EXP_TYPE_DOWNSTREAM && > + pdev->pcie_flags & PCI_EXP_FLAGS_SLOT); > +} > + > +static inline bool pci_pcie_cap_has_rtctl(const struct pci_dev *pdev) > +{ > + int type = pci_pcie_type(pdev); > + > + return pci_pcie_cap_version(pdev) > 1 || > + type == PCI_EXP_TYPE_ROOT_PORT || > + type == PCI_EXP_TYPE_RC_EC; > +} I hope these are used only in pci_pcie_cap_read/write(), so maybe they could just be moved to access.c along with them. Maybe you can just *add* definitions to pci/access.c (leaving pci/pci.c alone). Then you'd only have to touch the save/restore_pcie_state() functions once. > void pci_request_acs(void); > bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); > -- > 1.7.9.5 > -- 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/pci.c b/drivers/pci/pci.c index 28eb55b..4c6ab70 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -272,15 +272,11 @@ int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap) */ static int pci_pcie_cap2(struct pci_dev *dev) { - u16 flags; int pos; pos = pci_pcie_cap(dev); - if (pos) { - pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags); - if ((flags & PCI_EXP_FLAGS_VERS) < 2) - pos = 0; - } + if (pos && !pci_pcie_cap_has_cap2(dev)) + pos = 0; return pos; } @@ -854,21 +850,6 @@ EXPORT_SYMBOL(pci_choose_state); #define PCI_EXP_SAVE_REGS 7 -#define pcie_cap_has_devctl(type, flags) 1 -#define pcie_cap_has_lnkctl(type, flags) \ - ((flags & PCI_EXP_FLAGS_VERS) > 1 || \ - (type == PCI_EXP_TYPE_ROOT_PORT || \ - type == PCI_EXP_TYPE_ENDPOINT || \ - type == PCI_EXP_TYPE_LEG_END)) -#define pcie_cap_has_sltctl(type, flags) \ - ((flags & PCI_EXP_FLAGS_VERS) > 1 || \ - ((type == PCI_EXP_TYPE_ROOT_PORT) || \ - (type == PCI_EXP_TYPE_DOWNSTREAM && \ - (flags & PCI_EXP_FLAGS_SLOT)))) -#define pcie_cap_has_rtctl(type, flags) \ - ((flags & PCI_EXP_FLAGS_VERS) > 1 || \ - (type == PCI_EXP_TYPE_ROOT_PORT || \ - type == PCI_EXP_TYPE_RC_EC)) static struct pci_cap_saved_state *pci_find_saved_cap( struct pci_dev *pci_dev, char cap) @@ -885,10 +866,9 @@ static struct pci_cap_saved_state *pci_find_saved_cap( static int pci_save_pcie_state(struct pci_dev *dev) { - int type, pos, i = 0; + int pos, i = 0; struct pci_cap_saved_state *save_state; u16 *cap; - u16 flags; pos = pci_pcie_cap(dev); if (!pos) @@ -901,16 +881,14 @@ static int pci_save_pcie_state(struct pci_dev *dev) } cap = (u16 *)&save_state->cap.data[0]; - pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags); - type = pci_pcie_type(dev); - if (pcie_cap_has_devctl(type, flags)) + if (pci_pcie_cap_has_devctl(dev)) pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &cap[i++]); - if (pcie_cap_has_lnkctl(type, flags)) + if (pci_pcie_cap_has_lnkctl(dev)) pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &cap[i++]); - if (pcie_cap_has_sltctl(type, flags)) + if (pci_pcie_cap_has_sltctl(dev)) pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]); - if (pcie_cap_has_rtctl(type, flags)) + if (pci_pcie_cap_has_rtctl(dev)) pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]); pos = pci_pcie_cap2(dev); @@ -925,10 +903,9 @@ static int pci_save_pcie_state(struct pci_dev *dev) static void pci_restore_pcie_state(struct pci_dev *dev) { - int i = 0, pos, type; + int i = 0, pos; struct pci_cap_saved_state *save_state; u16 *cap; - u16 flags; save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP); pos = pci_find_capability(dev, PCI_CAP_ID_EXP); @@ -936,16 +913,13 @@ static void pci_restore_pcie_state(struct pci_dev *dev) return; cap = (u16 *)&save_state->cap.data[0]; - pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags); - - type = pci_pcie_type(dev); - if (pcie_cap_has_devctl(type, flags)) + if (pci_pcie_cap_has_devctl(dev)) pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, cap[i++]); - if (pcie_cap_has_lnkctl(type, flags)) + if (pci_pcie_cap_has_lnkctl(dev)) pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, cap[i++]); - if (pcie_cap_has_sltctl(type, flags)) + if (pci_pcie_cap_has_sltctl(dev)) pci_write_config_word(dev, pos + PCI_EXP_SLTCTL, cap[i++]); - if (pcie_cap_has_rtctl(type, flags)) + if (pci_pcie_cap_has_rtctl(dev)) pci_write_config_word(dev, pos + PCI_EXP_RTCTL, cap[i++]); pos = pci_pcie_cap2(dev); diff --git a/include/linux/pci.h b/include/linux/pci.h index 1837354..346b2d9 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1659,6 +1659,49 @@ static inline int pci_pcie_type(const struct pci_dev *dev) return (dev->pcie_flags & PCI_EXP_FLAGS_TYPE) >> 4; } +static inline int pci_pcie_cap_version(const struct pci_dev *pdev) +{ + return pdev->pcie_flags & PCI_EXP_FLAGS_VERS; +} + +static inline int pci_pcie_cap_has_cap2(const struct pci_dev *pdev) +{ + return pci_pcie_cap_version(pdev) > 1; +} + +static inline bool pci_pcie_cap_has_devctl(const struct pci_dev *pdev) +{ + return true; +} + +static inline bool pci_pcie_cap_has_lnkctl(const struct pci_dev *pdev) +{ + int type = pci_pcie_type(pdev); + + return pci_pcie_cap_version(pdev) > 1 || + type == PCI_EXP_TYPE_ROOT_PORT || + type == PCI_EXP_TYPE_ENDPOINT || + type == PCI_EXP_TYPE_LEG_END; +} + +static inline bool pci_pcie_cap_has_sltctl(const struct pci_dev *pdev) +{ + int type = pci_pcie_type(pdev); + + return pci_pcie_cap_version(pdev) > 1 || + type == PCI_EXP_TYPE_ROOT_PORT || + (type == PCI_EXP_TYPE_DOWNSTREAM && + pdev->pcie_flags & PCI_EXP_FLAGS_SLOT); +} + +static inline bool pci_pcie_cap_has_rtctl(const struct pci_dev *pdev) +{ + int type = pci_pcie_type(pdev); + + return pci_pcie_cap_version(pdev) > 1 || + type == PCI_EXP_TYPE_ROOT_PORT || + type == PCI_EXP_TYPE_RC_EC; +} void pci_request_acs(void); bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);