| Message ID | 1690948281-2143-2-git-send-email-quic_krichai@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v5,1/4] PCI: endpoint: Add D-state change notifier support | expand |
On Wed, Aug 02, 2023 at 09:21:18AM +0530, Krishna chaitanya chundru wrote: > Add support to notify the EPF device about the D-state change event > from the EPC device. > > Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com> > --- > Documentation/PCI/endpoint/pci-endpoint.rst | 4 ++++ > drivers/pci/endpoint/pci-epc-core.c | 27 +++++++++++++++++++++++++++ > include/linux/pci-epc.h | 1 + > include/linux/pci-epf.h | 1 + > 4 files changed, 33 insertions(+) > > diff --git a/Documentation/PCI/endpoint/pci-endpoint.rst b/Documentation/PCI/endpoint/pci-endpoint.rst > index 4f5622a..66f3191 100644 > --- a/Documentation/PCI/endpoint/pci-endpoint.rst > +++ b/Documentation/PCI/endpoint/pci-endpoint.rst > @@ -78,6 +78,10 @@ by the PCI controller driver. > Cleanup the pci_epc_mem structure allocated during pci_epc_mem_init(). > > > +* pci_epc_dstate_notity() s/notity/notify/ (several instances) > + > + Notify all the function drivers that the EPC device has changed its D-state. > + > EPC APIs for the PCI Endpoint Function Driver > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c > index 6c54fa5..4cf9c82 100644 > --- a/drivers/pci/endpoint/pci-epc-core.c > +++ b/drivers/pci/endpoint/pci-epc-core.c > @@ -785,6 +785,33 @@ void pci_epc_bme_notify(struct pci_epc *epc) > EXPORT_SYMBOL_GPL(pci_epc_bme_notify); > > /** > + * pci_epc_dstate_notity() - Notify the EPF driver that EPC device D-state > + * has changed > + * @epc: the EPC device which has change in D-state > + * @state: the changed D-state > + * > + * Invoke to Notify the EPF device that the EPC device has D-state has > + * changed. s/device has D-state/device D-state/ > + */ > +void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state) > +{ > + struct pci_epf *epf; > + > + if (!epc || IS_ERR(epc)) > + return; Is this needed? Looks like a programming error if we return here. I don't like silently ignoring errors like this. I generally prefer taking the NULL pointer dereference oops so we know the caller is broken and can fix it. > + mutex_lock(&epc->list_lock); > + list_for_each_entry(epf, &epc->pci_epf, list) { > + mutex_lock(&epf->lock); > + if (epf->event_ops && epf->event_ops->dstate_notify) > + epf->event_ops->dstate_notify(epf, state); > + mutex_unlock(&epf->lock); > + } > + mutex_unlock(&epc->list_lock); > +} > +EXPORT_SYMBOL_GPL(pci_epc_dstate_notity); > + > +/** > * pci_epc_destroy() - destroy the EPC device > * @epc: the EPC device that has to be destroyed > * > diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h > index 5cb6940..26a1108 100644 > --- a/include/linux/pci-epc.h > +++ b/include/linux/pci-epc.h > @@ -251,4 +251,5 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc, > phys_addr_t *phys_addr, size_t size); > void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr, > void __iomem *virt_addr, size_t size); > +void pci_epc_dstate_change(struct pci_epc *epc, pci_power_t state); > #endif /* __LINUX_PCI_EPC_H */ > diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h > index 3f44b6a..529075b 100644 > --- a/include/linux/pci-epf.h > +++ b/include/linux/pci-epf.h > @@ -79,6 +79,7 @@ struct pci_epc_event_ops { > int (*link_up)(struct pci_epf *epf); > int (*link_down)(struct pci_epf *epf); > int (*bme)(struct pci_epf *epf); > + int (*dstate_notify)(struct pci_epf *epf, pci_power_t state); > }; > > /** > -- > 2.7.4 >
On Wed, Aug 02, 2023 at 01:14:44PM +0800, kernel test robot wrote: > Hi Krishna, > > kernel test robot noticed the following build warnings: > > [auto build test WARNING on pci/next] > [also build test WARNING on pci/for-linus linus/master v6.5-rc4 next-20230801] > [If your patch is applied to the wrong git tree, kindly drop us a note. > And when submitting patch, we suggest to use '--base' as documented in > https://git-scm.com/docs/git-format-patch#_base_tree_information] > > url: https://github.com/intel-lab-lkp/linux/commits/Krishna-chaitanya-chundru/PCI-endpoint-Add-D-state-change-notifier-support/20230802-115309 > base: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next > patch link: https://lore.kernel.org/r/1690948281-2143-2-git-send-email-quic_krichai%40quicinc.com > patch subject: [PATCH v5 1/4] PCI: endpoint: Add D-state change notifier support > config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20230802/202308021312.obgu7FWM-lkp@intel.com/config) > compiler: loongarch64-linux-gcc (GCC) 12.3.0 > reproduce: (https://download.01.org/0day-ci/archive/20230802/202308021312.obgu7FWM-lkp@intel.com/reproduce) > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot <lkp@intel.com> > | Closes: https://lore.kernel.org/oe-kbuild-all/202308021312.obgu7FWM-lkp@intel.com/ > > All warnings (new ones prefixed by >>): > > >> drivers/pci/endpoint/pci-epc-core.c:795:6: warning: no previous prototype for 'pci_epc_dstate_notity' [-Wmissing-prototypes] > 795 | void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state) This tells that you haven't build tested the series before sending. Please always do both build and functionality testing before sending each iteration. - Mani > | ^~~~~~~~~~~~~~~~~~~~~ > > > vim +/pci_epc_dstate_notity +795 drivers/pci/endpoint/pci-epc-core.c > > 785 > 786 /** > 787 * pci_epc_dstate_notity() - Notify the EPF driver that EPC device D-state > 788 * has changed > 789 * @epc: the EPC device which has change in D-state > 790 * @state: the changed D-state > 791 * > 792 * Invoke to Notify the EPF device that the EPC device has D-state has > 793 * changed. > 794 */ > > 795 void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state) > 796 { > 797 struct pci_epf *epf; > 798 > 799 if (!epc || IS_ERR(epc)) > 800 return; > 801 > 802 mutex_lock(&epc->list_lock); > 803 list_for_each_entry(epf, &epc->pci_epf, list) { > 804 mutex_lock(&epf->lock); > 805 if (epf->event_ops && epf->event_ops->dstate_notify) > 806 epf->event_ops->dstate_notify(epf, state); > 807 mutex_unlock(&epf->lock); > 808 } > 809 mutex_unlock(&epc->list_lock); > 810 } > 811 EXPORT_SYMBOL_GPL(pci_epc_dstate_notity); > 812 > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki
On 8/3/2023 11:18 PM, Bjorn Helgaas wrote: > On Wed, Aug 02, 2023 at 09:21:18AM +0530, Krishna chaitanya chundru wrote: >> Add support to notify the EPF device about the D-state change event >> from the EPC device. >> >> Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com> >> --- >> Documentation/PCI/endpoint/pci-endpoint.rst | 4 ++++ >> drivers/pci/endpoint/pci-epc-core.c | 27 +++++++++++++++++++++++++++ >> include/linux/pci-epc.h | 1 + >> include/linux/pci-epf.h | 1 + >> 4 files changed, 33 insertions(+) >> >> diff --git a/Documentation/PCI/endpoint/pci-endpoint.rst b/Documentation/PCI/endpoint/pci-endpoint.rst >> index 4f5622a..66f3191 100644 >> --- a/Documentation/PCI/endpoint/pci-endpoint.rst >> +++ b/Documentation/PCI/endpoint/pci-endpoint.rst >> @@ -78,6 +78,10 @@ by the PCI controller driver. >> Cleanup the pci_epc_mem structure allocated during pci_epc_mem_init(). >> >> >> +* pci_epc_dstate_notity() > s/notity/notify/ (several instances) sorry for late reply, till now I was using a different branch which has some out of tree patches for testing and rebasing the patch on linux-next to send them because of that few things are getting missed. Now I took time to completely move to the linux next so that testing and sending patches will be on same code base. >> + >> + Notify all the function drivers that the EPC device has changed its D-state. >> + >> EPC APIs for the PCI Endpoint Function Driver >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> >> diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c >> index 6c54fa5..4cf9c82 100644 >> --- a/drivers/pci/endpoint/pci-epc-core.c >> +++ b/drivers/pci/endpoint/pci-epc-core.c >> @@ -785,6 +785,33 @@ void pci_epc_bme_notify(struct pci_epc *epc) >> EXPORT_SYMBOL_GPL(pci_epc_bme_notify); >> >> /** >> + * pci_epc_dstate_notity() - Notify the EPF driver that EPC device D-state >> + * has changed >> + * @epc: the EPC device which has change in D-state >> + * @state: the changed D-state >> + * >> + * Invoke to Notify the EPF device that the EPC device has D-state has >> + * changed. > s/device has D-state/device D-state/ > >> + */ >> +void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state) >> +{ >> + struct pci_epf *epf; >> + >> + if (!epc || IS_ERR(epc)) >> + return; > Is this needed? Looks like a programming error if we return here. I > don't like silently ignoring errors like this. I generally prefer > taking the NULL pointer dereference oops so we know the caller is > broken and can fix it. sure I will remove this check in the next patch series. > >> + mutex_lock(&epc->list_lock); >> + list_for_each_entry(epf, &epc->pci_epf, list) { >> + mutex_lock(&epf->lock); >> + if (epf->event_ops && epf->event_ops->dstate_notify) >> + epf->event_ops->dstate_notify(epf, state); >> + mutex_unlock(&epf->lock); >> + } >> + mutex_unlock(&epc->list_lock); >> +} >> +EXPORT_SYMBOL_GPL(pci_epc_dstate_notity); >> + >> +/** >> * pci_epc_destroy() - destroy the EPC device >> * @epc: the EPC device that has to be destroyed >> * >> diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h >> index 5cb6940..26a1108 100644 >> --- a/include/linux/pci-epc.h >> +++ b/include/linux/pci-epc.h >> @@ -251,4 +251,5 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc, >> phys_addr_t *phys_addr, size_t size); >> void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr, >> void __iomem *virt_addr, size_t size); >> +void pci_epc_dstate_change(struct pci_epc *epc, pci_power_t state); >> #endif /* __LINUX_PCI_EPC_H */ >> diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h >> index 3f44b6a..529075b 100644 >> --- a/include/linux/pci-epf.h >> +++ b/include/linux/pci-epf.h >> @@ -79,6 +79,7 @@ struct pci_epc_event_ops { >> int (*link_up)(struct pci_epf *epf); >> int (*link_down)(struct pci_epf *epf); >> int (*bme)(struct pci_epf *epf); >> + int (*dstate_notify)(struct pci_epf *epf, pci_power_t state); >> }; >> >> /** >> -- >> 2.7.4 >>
On 8/23/2023 11:49 AM, Manivannan Sadhasivam wrote: > On Wed, Aug 02, 2023 at 01:14:44PM +0800, kernel test robot wrote: >> Hi Krishna, >> >> kernel test robot noticed the following build warnings: >> >> [auto build test WARNING on pci/next] >> [also build test WARNING on pci/for-linus linus/master v6.5-rc4 next-20230801] >> [If your patch is applied to the wrong git tree, kindly drop us a note. >> And when submitting patch, we suggest to use '--base' as documented in >> https://git-scm.com/docs/git-format-patch#_base_tree_information] >> >> url: https://github.com/intel-lab-lkp/linux/commits/Krishna-chaitanya-chundru/PCI-endpoint-Add-D-state-change-notifier-support/20230802-115309 >> base: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next >> patch link: https://lore.kernel.org/r/1690948281-2143-2-git-send-email-quic_krichai%40quicinc.com >> patch subject: [PATCH v5 1/4] PCI: endpoint: Add D-state change notifier support >> config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20230802/202308021312.obgu7FWM-lkp@intel.com/config) >> compiler: loongarch64-linux-gcc (GCC) 12.3.0 >> reproduce: (https://download.01.org/0day-ci/archive/20230802/202308021312.obgu7FWM-lkp@intel.com/reproduce) >> >> If you fix the issue in a separate patch/commit (i.e. not just a new version of >> the same patch/commit), kindly add following tags >> | Reported-by: kernel test robot <lkp@intel.com> >> | Closes: https://lore.kernel.org/oe-kbuild-all/202308021312.obgu7FWM-lkp@intel.com/ >> >> All warnings (new ones prefixed by >>): >> >>>> drivers/pci/endpoint/pci-epc-core.c:795:6: warning: no previous prototype for 'pci_epc_dstate_notity' [-Wmissing-prototypes] >> 795 | void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state) > This tells that you haven't build tested the series before sending. Please > always do both build and functionality testing before sending each iteration. > > - Mani sorry for late reply, till now I was using a different branch which has some out of tree patches for testing and rebasing the patch on linux-next to send them because of that few things are getting missed. Now I took time to completely move to the linux next so that testing and sending patches will be on same code base. I will correct this in next patch series. - KC >> | ^~~~~~~~~~~~~~~~~~~~~ >> >> >> vim +/pci_epc_dstate_notity +795 drivers/pci/endpoint/pci-epc-core.c >> >> 785 >> 786 /** >> 787 * pci_epc_dstate_notity() - Notify the EPF driver that EPC device D-state >> 788 * has changed >> 789 * @epc: the EPC device which has change in D-state >> 790 * @state: the changed D-state >> 791 * >> 792 * Invoke to Notify the EPF device that the EPC device has D-state has >> 793 * changed. >> 794 */ >> > 795 void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state) >> 796 { >> 797 struct pci_epf *epf; >> 798 >> 799 if (!epc || IS_ERR(epc)) >> 800 return; >> 801 >> 802 mutex_lock(&epc->list_lock); >> 803 list_for_each_entry(epf, &epc->pci_epf, list) { >> 804 mutex_lock(&epf->lock); >> 805 if (epf->event_ops && epf->event_ops->dstate_notify) >> 806 epf->event_ops->dstate_notify(epf, state); >> 807 mutex_unlock(&epf->lock); >> 808 } >> 809 mutex_unlock(&epc->list_lock); >> 810 } >> 811 EXPORT_SYMBOL_GPL(pci_epc_dstate_notity); >> 812 >> >> -- >> 0-DAY CI Kernel Test Service >> https://github.com/intel/lkp-tests/wiki
diff --git a/Documentation/PCI/endpoint/pci-endpoint.rst b/Documentation/PCI/endpoint/pci-endpoint.rst index 4f5622a..66f3191 100644 --- a/Documentation/PCI/endpoint/pci-endpoint.rst +++ b/Documentation/PCI/endpoint/pci-endpoint.rst @@ -78,6 +78,10 @@ by the PCI controller driver. Cleanup the pci_epc_mem structure allocated during pci_epc_mem_init(). +* pci_epc_dstate_notity() + + Notify all the function drivers that the EPC device has changed its D-state. + EPC APIs for the PCI Endpoint Function Driver ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 6c54fa5..4cf9c82 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -785,6 +785,33 @@ void pci_epc_bme_notify(struct pci_epc *epc) EXPORT_SYMBOL_GPL(pci_epc_bme_notify); /** + * pci_epc_dstate_notity() - Notify the EPF driver that EPC device D-state + * has changed + * @epc: the EPC device which has change in D-state + * @state: the changed D-state + * + * Invoke to Notify the EPF device that the EPC device has D-state has + * changed. + */ +void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state) +{ + struct pci_epf *epf; + + if (!epc || IS_ERR(epc)) + return; + + mutex_lock(&epc->list_lock); + list_for_each_entry(epf, &epc->pci_epf, list) { + mutex_lock(&epf->lock); + if (epf->event_ops && epf->event_ops->dstate_notify) + epf->event_ops->dstate_notify(epf, state); + mutex_unlock(&epf->lock); + } + mutex_unlock(&epc->list_lock); +} +EXPORT_SYMBOL_GPL(pci_epc_dstate_notity); + +/** * pci_epc_destroy() - destroy the EPC device * @epc: the EPC device that has to be destroyed * diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 5cb6940..26a1108 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -251,4 +251,5 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc, phys_addr_t *phys_addr, size_t size); void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr, void __iomem *virt_addr, size_t size); +void pci_epc_dstate_change(struct pci_epc *epc, pci_power_t state); #endif /* __LINUX_PCI_EPC_H */ diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index 3f44b6a..529075b 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -79,6 +79,7 @@ struct pci_epc_event_ops { int (*link_up)(struct pci_epf *epf); int (*link_down)(struct pci_epf *epf); int (*bme)(struct pci_epf *epf); + int (*dstate_notify)(struct pci_epf *epf, pci_power_t state); }; /**
Add support to notify the EPF device about the D-state change event from the EPC device. Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com> --- Documentation/PCI/endpoint/pci-endpoint.rst | 4 ++++ drivers/pci/endpoint/pci-epc-core.c | 27 +++++++++++++++++++++++++++ include/linux/pci-epc.h | 1 + include/linux/pci-epf.h | 1 + 4 files changed, 33 insertions(+)