* [PATCH v2 4/5] MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg() [not found] <1408694880-8260-1-git-send-email-wangyijing@huawei.com> @ 2014-08-22 7:45 ` Yijing Wang 2014-09-22 23:08 ` Bjorn Helgaas 0 siblings, 1 reply; 3+ messages in thread From: Yijing Wang @ 2014-08-22 7:45 UTC (permalink / raw) To: Bjorn Helgaas Cc: linux-pci, Yijing Wang, Tony Luck, Thomas Gleixner, x86, linux-ia64 Get_cached_msi_msg() only be called in two places, ia64_set_msi_irq_affinity() and sn_set_msi_irq_affinity(). The code flow is: irq = irq_data->irq get_cached_msi_msg(irq) irq_get_msi_desc(irq) irq_get_irq_data(irq) msi_desc = irq_data->desc __get_cached_msi_msg(msi_desc, msg) This is crazy, we should use __get_cached_msi_msg(irq_data->desc, msg) directly to simplify the flow, and remove get_cached_msi_msg(). Finally, rename __get_cached_msi_msg() to get_cached_msi_msg(). Signed-off-by: Yijing Wang <wangyijing@huawei.com> CC: Tony Luck <tony.luck@intel.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: x86@kernel.org CC: linux-ia64@vger.kernel.org --- arch/ia64/kernel/msi_ia64.c | 2 +- arch/ia64/sn/kernel/msi_sn.c | 4 ++-- arch/x86/kernel/apic/io_apic.c | 2 +- drivers/pci/msi.c | 9 +-------- include/linux/msi.h | 3 +-- 5 files changed, 6 insertions(+), 14 deletions(-) diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c index c430f91..4efe748 100644 --- a/arch/ia64/kernel/msi_ia64.c +++ b/arch/ia64/kernel/msi_ia64.c @@ -23,7 +23,7 @@ static int ia64_set_msi_irq_affinity(struct irq_data *idata, if (irq_prepare_move(irq, cpu)) return -1; - get_cached_msi_msg(irq, &msg); + get_cached_msi_msg(idata->msi_desc, &msg); addr = msg.address_lo; addr &= MSI_ADDR_DEST_ID_MASK; diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c index afc58d2..8bec242 100644 --- a/arch/ia64/sn/kernel/msi_sn.c +++ b/arch/ia64/sn/kernel/msi_sn.c @@ -175,8 +175,8 @@ static int sn_set_msi_irq_affinity(struct irq_data *data, * Release XIO resources for the old MSI PCI address */ - get_cached_msi_msg(irq, &msg); - sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; + get_cached_msi_msg(data->msi_desc, &msg); + sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; pdev = sn_pdev->pdi_linux_pcidev; provider = SN_PCIDEV_BUSPROVIDER(pdev); diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 29290f5..e877cfb 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -3145,7 +3145,7 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) if (ret) return ret; - __get_cached_msi_msg(data->msi_desc, &msg); + get_cached_msi_msg(data->msi_desc, &msg); msg.data &= ~MSI_DATA_VECTOR_MASK; msg.data |= MSI_DATA_VECTOR(cfg->vector); diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 0d0f163..8746ecd 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -296,7 +296,7 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg) __read_msi_msg(entry, msg); } -void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) +void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) { /* Assert that the cache is valid, assuming that * valid messages are not all-zeroes. */ @@ -306,13 +306,6 @@ void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) *msg = entry->msg; } -void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg) -{ - struct msi_desc *entry = irq_get_msi_desc(irq); - - __get_cached_msi_msg(entry, msg); -} - void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg) { if (entry->dev->current_state != PCI_D0) { diff --git a/include/linux/msi.h b/include/linux/msi.h index fff7201..329ec73 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -16,10 +16,9 @@ struct msi_desc; void mask_msi_irq(struct irq_data *data); void unmask_msi_irq(struct irq_data *data); void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); -void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); +void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void read_msi_msg(unsigned int irq, struct msi_msg *msg); -void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); void write_msi_msg(unsigned int irq, struct msi_msg *msg); struct msi_desc { -- 1.7.1 ^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2 4/5] MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg() 2014-08-22 7:45 ` [PATCH v2 4/5] MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg() Yijing Wang @ 2014-09-22 23:08 ` Bjorn Helgaas 2014-09-23 1:22 ` Yijing Wang 0 siblings, 1 reply; 3+ messages in thread From: Bjorn Helgaas @ 2014-09-22 23:08 UTC (permalink / raw) To: Yijing Wang; +Cc: linux-pci, Tony Luck, Thomas Gleixner, x86, linux-ia64 On Fri, Aug 22, 2014 at 04:07:59PM +0800, Yijing Wang wrote: > Get_cached_msi_msg() only be called in two places, > ia64_set_msi_irq_affinity() and sn_set_msi_irq_affinity(). > > The code flow is: > irq = irq_data->irq > get_cached_msi_msg(irq) > irq_get_msi_desc(irq) > irq_get_irq_data(irq) > msi_desc = irq_data->desc > __get_cached_msi_msg(msi_desc, msg) > > This is crazy, we should use __get_cached_msi_msg(irq_data->desc, msg) > directly to simplify the flow, and remove get_cached_msi_msg(). > Finally, rename __get_cached_msi_msg() to get_cached_msi_msg(). This looks like a nice cleanup. It'd be easier to review if this were two patches: 1) Convert all callers to use __get_cached_msi_msg() rather than get_cached_msi_msg(). 2) Remove the unused get_cached_msi_msg() and rename __get_cached_msi_msg() to get_cached_msi_msg(). Maybe even the second patch should be split into remove and rename patches. > Signed-off-by: Yijing Wang <wangyijing@huawei.com> > CC: Tony Luck <tony.luck@intel.com> > CC: Thomas Gleixner <tglx@linutronix.de> > CC: x86@kernel.org > CC: linux-ia64@vger.kernel.org > --- > arch/ia64/kernel/msi_ia64.c | 2 +- > arch/ia64/sn/kernel/msi_sn.c | 4 ++-- > arch/x86/kernel/apic/io_apic.c | 2 +- > drivers/pci/msi.c | 9 +-------- > include/linux/msi.h | 3 +-- > 5 files changed, 6 insertions(+), 14 deletions(-) > > diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c > index c430f91..4efe748 100644 > --- a/arch/ia64/kernel/msi_ia64.c > +++ b/arch/ia64/kernel/msi_ia64.c > @@ -23,7 +23,7 @@ static int ia64_set_msi_irq_affinity(struct irq_data *idata, > if (irq_prepare_move(irq, cpu)) > return -1; > > - get_cached_msi_msg(irq, &msg); > + get_cached_msi_msg(idata->msi_desc, &msg); > > addr = msg.address_lo; > addr &= MSI_ADDR_DEST_ID_MASK; > diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c > index afc58d2..8bec242 100644 > --- a/arch/ia64/sn/kernel/msi_sn.c > +++ b/arch/ia64/sn/kernel/msi_sn.c > @@ -175,8 +175,8 @@ static int sn_set_msi_irq_affinity(struct irq_data *data, > * Release XIO resources for the old MSI PCI address > */ > > - get_cached_msi_msg(irq, &msg); > - sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; > + get_cached_msi_msg(data->msi_desc, &msg); > + sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; > pdev = sn_pdev->pdi_linux_pcidev; > provider = SN_PCIDEV_BUSPROVIDER(pdev); > > diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c > index 29290f5..e877cfb 100644 > --- a/arch/x86/kernel/apic/io_apic.c > +++ b/arch/x86/kernel/apic/io_apic.c > @@ -3145,7 +3145,7 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) > if (ret) > return ret; > > - __get_cached_msi_msg(data->msi_desc, &msg); > + get_cached_msi_msg(data->msi_desc, &msg); > > msg.data &= ~MSI_DATA_VECTOR_MASK; > msg.data |= MSI_DATA_VECTOR(cfg->vector); > diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c > index 0d0f163..8746ecd 100644 > --- a/drivers/pci/msi.c > +++ b/drivers/pci/msi.c > @@ -296,7 +296,7 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg) > __read_msi_msg(entry, msg); > } > > -void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) > +void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) > { > /* Assert that the cache is valid, assuming that > * valid messages are not all-zeroes. */ > @@ -306,13 +306,6 @@ void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) > *msg = entry->msg; > } > > -void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg) > -{ > - struct msi_desc *entry = irq_get_msi_desc(irq); > - > - __get_cached_msi_msg(entry, msg); > -} > - > void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg) > { > if (entry->dev->current_state != PCI_D0) { > diff --git a/include/linux/msi.h b/include/linux/msi.h > index fff7201..329ec73 100644 > --- a/include/linux/msi.h > +++ b/include/linux/msi.h > @@ -16,10 +16,9 @@ struct msi_desc; > void mask_msi_irq(struct irq_data *data); > void unmask_msi_irq(struct irq_data *data); > void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > -void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > +void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); > void read_msi_msg(unsigned int irq, struct msi_msg *msg); > -void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); > void write_msi_msg(unsigned int irq, struct msi_msg *msg); > > struct msi_desc { > -- > 1.7.1 > > -- > 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2 4/5] MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg() 2014-09-22 23:08 ` Bjorn Helgaas @ 2014-09-23 1:22 ` Yijing Wang 0 siblings, 0 replies; 3+ messages in thread From: Yijing Wang @ 2014-09-23 1:22 UTC (permalink / raw) To: Bjorn Helgaas; +Cc: linux-pci, Tony Luck, Thomas Gleixner, x86, linux-ia64 On 2014/9/23 7:08, Bjorn Helgaas wrote: > On Fri, Aug 22, 2014 at 04:07:59PM +0800, Yijing Wang wrote: >> Get_cached_msi_msg() only be called in two places, >> ia64_set_msi_irq_affinity() and sn_set_msi_irq_affinity(). >> >> The code flow is: >> irq = irq_data->irq >> get_cached_msi_msg(irq) >> irq_get_msi_desc(irq) >> irq_get_irq_data(irq) >> msi_desc = irq_data->desc >> __get_cached_msi_msg(msi_desc, msg) >> >> This is crazy, we should use __get_cached_msi_msg(irq_data->desc, msg) >> directly to simplify the flow, and remove get_cached_msi_msg(). >> Finally, rename __get_cached_msi_msg() to get_cached_msi_msg(). > > This looks like a nice cleanup. It'd be easier to review if this were two > patches: > > 1) Convert all callers to use __get_cached_msi_msg() rather than > get_cached_msi_msg(). > 2) Remove the unused get_cached_msi_msg() and rename > __get_cached_msi_msg() to get_cached_msi_msg(). > > Maybe even the second patch should be split into remove and rename patches. OK. Thanks! Yijing. > >> Signed-off-by: Yijing Wang <wangyijing@huawei.com> >> CC: Tony Luck <tony.luck@intel.com> >> CC: Thomas Gleixner <tglx@linutronix.de> >> CC: x86@kernel.org >> CC: linux-ia64@vger.kernel.org >> --- >> arch/ia64/kernel/msi_ia64.c | 2 +- >> arch/ia64/sn/kernel/msi_sn.c | 4 ++-- >> arch/x86/kernel/apic/io_apic.c | 2 +- >> drivers/pci/msi.c | 9 +-------- >> include/linux/msi.h | 3 +-- >> 5 files changed, 6 insertions(+), 14 deletions(-) >> >> diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c >> index c430f91..4efe748 100644 >> --- a/arch/ia64/kernel/msi_ia64.c >> +++ b/arch/ia64/kernel/msi_ia64.c >> @@ -23,7 +23,7 @@ static int ia64_set_msi_irq_affinity(struct irq_data *idata, >> if (irq_prepare_move(irq, cpu)) >> return -1; >> >> - get_cached_msi_msg(irq, &msg); >> + get_cached_msi_msg(idata->msi_desc, &msg); >> >> addr = msg.address_lo; >> addr &= MSI_ADDR_DEST_ID_MASK; >> diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c >> index afc58d2..8bec242 100644 >> --- a/arch/ia64/sn/kernel/msi_sn.c >> +++ b/arch/ia64/sn/kernel/msi_sn.c >> @@ -175,8 +175,8 @@ static int sn_set_msi_irq_affinity(struct irq_data *data, >> * Release XIO resources for the old MSI PCI address >> */ >> >> - get_cached_msi_msg(irq, &msg); >> - sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; >> + get_cached_msi_msg(data->msi_desc, &msg); >> + sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; >> pdev = sn_pdev->pdi_linux_pcidev; >> provider = SN_PCIDEV_BUSPROVIDER(pdev); >> >> diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c >> index 29290f5..e877cfb 100644 >> --- a/arch/x86/kernel/apic/io_apic.c >> +++ b/arch/x86/kernel/apic/io_apic.c >> @@ -3145,7 +3145,7 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) >> if (ret) >> return ret; >> >> - __get_cached_msi_msg(data->msi_desc, &msg); >> + get_cached_msi_msg(data->msi_desc, &msg); >> >> msg.data &= ~MSI_DATA_VECTOR_MASK; >> msg.data |= MSI_DATA_VECTOR(cfg->vector); >> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c >> index 0d0f163..8746ecd 100644 >> --- a/drivers/pci/msi.c >> +++ b/drivers/pci/msi.c >> @@ -296,7 +296,7 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg) >> __read_msi_msg(entry, msg); >> } >> >> -void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) >> +void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) >> { >> /* Assert that the cache is valid, assuming that >> * valid messages are not all-zeroes. */ >> @@ -306,13 +306,6 @@ void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) >> *msg = entry->msg; >> } >> >> -void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg) >> -{ >> - struct msi_desc *entry = irq_get_msi_desc(irq); >> - >> - __get_cached_msi_msg(entry, msg); >> -} >> - >> void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg) >> { >> if (entry->dev->current_state != PCI_D0) { >> diff --git a/include/linux/msi.h b/include/linux/msi.h >> index fff7201..329ec73 100644 >> --- a/include/linux/msi.h >> +++ b/include/linux/msi.h >> @@ -16,10 +16,9 @@ struct msi_desc; >> void mask_msi_irq(struct irq_data *data); >> void unmask_msi_irq(struct irq_data *data); >> void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); >> -void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); >> +void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); >> void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); >> void read_msi_msg(unsigned int irq, struct msi_msg *msg); >> -void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); >> void write_msi_msg(unsigned int irq, struct msi_msg *msg); >> >> struct msi_desc { >> -- >> 1.7.1 >> >> -- >> 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 > > . > -- Thanks! Yijing ^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-08-22 7:45 ` [PATCH v2 4/5] MSI: Use __get_cached_msi_msg() instead of get_cached_msi_msg() Yijing Wang
2014-09-22 23:08 ` Bjorn Helgaas
2014-09-23 1:22 ` Yijing Wang
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