| Message ID | 20131127184652.GA1856@kroah.com |
|---|---|
| State | Accepted |
| Headers | show |
On Wed, Nov 27, 2013 at 10:46:52AM -0800, Greg Kroah-Hartman wrote: > From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > > The PCI MSI sysfs code is a mess with kobjects for things that don't > really need to be kobjects. This patch creates attributes dynamically > for the MSI interrupts instead of using kobjects. > > Note, this removes a directory from the current MSI interrupt sysfs > code: > > old MSI kobjects: > pci_device > └── msi_irqs > └── 40 > └── mode > > new MSI attributes: > pci_device > └── msi_irqs > └── 40 > > As there was only one file "mode" with the kobject model, the interrupt > number is now a file that returns the "mode" of the interrupt (msi vs. > msix). > > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > > --- > > Neil, can you test this patch to see if irqbalance works as-is or not? > ACK, Testing with git-head irqbalance on F19 with this patch and it works fine. Thanks! Acked-by: Neil Horman <nhorman@tuxdriver.com> -- 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 Wed, Nov 27, 2013 at 10:46:52AM -0800, Greg Kroah-Hartman wrote: >From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > >The PCI MSI sysfs code is a mess with kobjects for things that don't >really need to be kobjects. This patch creates attributes dynamically >for the MSI interrupts instead of using kobjects. > >Note, this removes a directory from the current MSI interrupt sysfs >code: > >old MSI kobjects: >pci_device > └── msi_irqs > └── 40 > └── mode > >new MSI attributes: >pci_device > └── msi_irqs > └── 40 > >As there was only one file "mode" with the kobject model, the interrupt >number is now a file that returns the "mode" of the interrupt (msi vs. >msix). > >Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Works like a charm for me. FWIW, Reviewed-by: Veaceslav Falico <vfalico@redhat.com> > >--- > >Neil, can you test this patch to see if irqbalance works as-is or not? > >thanks, > >greg k-h > > drivers/pci/msi.c | 152 +++++++++++++++++++++++++--------------------------- > include/linux/pci.h | 2 > 2 files changed, 76 insertions(+), 78 deletions(-) > >--- a/drivers/pci/msi.c >+++ b/drivers/pci/msi.c >@@ -363,6 +363,9 @@ void write_msi_msg(unsigned int irq, str > static void free_msi_irqs(struct pci_dev *dev) > { > struct msi_desc *entry, *tmp; >+ struct attribute **msi_attrs; >+ struct device_attribute *dev_attr; >+ int count = 0; > > list_for_each_entry(entry, &dev->msi_list, list) { > int i, nvec; >@@ -398,6 +401,22 @@ static void free_msi_irqs(struct pci_dev > list_del(&entry->list); > kfree(entry); > } >+ >+ if (dev->msi_irq_groups) { >+ sysfs_remove_groups(&dev->dev.kobj, dev->msi_irq_groups); >+ msi_attrs = dev->msi_irq_groups[0]->attrs; >+ list_for_each_entry(entry, &dev->msi_list, list) { >+ dev_attr = container_of(msi_attrs[count], >+ struct device_attribute, attr); >+ kfree(dev_attr->attr.name); >+ kfree(dev_attr); >+ ++count; >+ } >+ kfree(msi_attrs); >+ kfree(dev->msi_irq_groups[0]); >+ kfree(dev->msi_irq_groups); >+ dev->msi_irq_groups = NULL; >+ } > } > > static struct msi_desc *alloc_msi_entry(struct pci_dev *dev) >@@ -471,96 +490,79 @@ void pci_restore_msi_state(struct pci_de > } > EXPORT_SYMBOL_GPL(pci_restore_msi_state); > >- >-#define to_msi_attr(obj) container_of(obj, struct msi_attribute, attr) >-#define to_msi_desc(obj) container_of(obj, struct msi_desc, kobj) >- >-struct msi_attribute { >- struct attribute attr; >- ssize_t (*show)(struct msi_desc *entry, struct msi_attribute *attr, >- char *buf); >- ssize_t (*store)(struct msi_desc *entry, struct msi_attribute *attr, >- const char *buf, size_t count); >-}; >- >-static ssize_t show_msi_mode(struct msi_desc *entry, struct msi_attribute *atr, >+static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr, > char *buf) > { >- return sprintf(buf, "%s\n", entry->msi_attrib.is_msix ? "msix" : "msi"); >-} >- >-static ssize_t msi_irq_attr_show(struct kobject *kobj, >- struct attribute *attr, char *buf) >-{ >- struct msi_attribute *attribute = to_msi_attr(attr); >- struct msi_desc *entry = to_msi_desc(kobj); >- >- if (!attribute->show) >- return -EIO; >- >- return attribute->show(entry, attribute, buf); >-} >- >-static const struct sysfs_ops msi_irq_sysfs_ops = { >- .show = msi_irq_attr_show, >-}; >- >-static struct msi_attribute mode_attribute = >- __ATTR(mode, S_IRUGO, show_msi_mode, NULL); >- >+ struct pci_dev *pdev = to_pci_dev(dev); >+ struct msi_desc *entry; >+ unsigned long irq; >+ int retval; > >-static struct attribute *msi_irq_default_attrs[] = { >- &mode_attribute.attr, >- NULL >-}; >+ retval = kstrtoul(attr->attr.name, 10, &irq); >+ if (retval) >+ return retval; > >-static void msi_kobj_release(struct kobject *kobj) >-{ >- struct msi_desc *entry = to_msi_desc(kobj); >- >- pci_dev_put(entry->dev); >+ list_for_each_entry(entry, &pdev->msi_list, list) { >+ if (entry->irq == irq) { >+ return sprintf(buf, "%s\n", >+ entry->msi_attrib.is_msix ? "msix" : "msi"); >+ } >+ } >+ return -ENODEV; > } > >-static struct kobj_type msi_irq_ktype = { >- .release = msi_kobj_release, >- .sysfs_ops = &msi_irq_sysfs_ops, >- .default_attrs = msi_irq_default_attrs, >-}; >- > static int populate_msi_sysfs(struct pci_dev *pdev) > { >+ struct attribute **msi_attrs; >+ struct device_attribute *msi_dev_attr; >+ struct attribute_group *msi_irq_group; >+ const struct attribute_group **msi_irq_groups; > struct msi_desc *entry; >- struct kobject *kobj; > int ret; >+ int num_msi = 0; > int count = 0; > >- pdev->msi_kset = kset_create_and_add("msi_irqs", NULL, &pdev->dev.kobj); >- if (!pdev->msi_kset) >- return -ENOMEM; >- >+ /* Determine how many msi entries we have */ > list_for_each_entry(entry, &pdev->msi_list, list) { >- kobj = &entry->kobj; >- kobj->kset = pdev->msi_kset; >- pci_dev_get(pdev); >- ret = kobject_init_and_add(kobj, &msi_irq_ktype, NULL, >- "%u", entry->irq); >- if (ret) >- goto out_unroll; >- >- count++; >+ ++num_msi; > } >+ if (!num_msi) >+ return 0; > >- return 0; >- >-out_unroll: >+ /* Dynamically create the MSI attributes for the PCI device */ >+ msi_attrs = kzalloc(sizeof(void *) * (num_msi + 1), GFP_KERNEL); >+ if (!msi_attrs) >+ return -ENOMEM; > list_for_each_entry(entry, &pdev->msi_list, list) { >- if (!count) >- break; >- kobject_del(&entry->kobj); >- kobject_put(&entry->kobj); >- count--; >+ char *name = kmalloc(20, GFP_KERNEL); >+ msi_dev_attr = kzalloc(sizeof(*msi_dev_attr), GFP_KERNEL); >+ if (!msi_dev_attr) >+ return -ENOMEM; >+ sprintf(name, "%d", entry->irq); >+ msi_dev_attr->attr.name = name; >+ msi_dev_attr->attr.mode = S_IRUGO; >+ msi_dev_attr->show = msi_mode_show; >+ msi_attrs[count] = &msi_dev_attr->attr; >+ ++count; > } >- return ret; >+ >+ msi_irq_group = kzalloc(sizeof(*msi_irq_group), GFP_KERNEL); >+ if (!msi_irq_group) >+ return -ENOMEM; >+ msi_irq_group->name = "msi_irqs"; >+ msi_irq_group->attrs = msi_attrs; >+ >+ msi_irq_groups = kzalloc(sizeof(void *) * 2, GFP_KERNEL); >+ if (!msi_irq_groups) >+ return -ENOMEM; >+ msi_irq_groups[0] = msi_irq_group; >+ >+ ret = sysfs_create_groups(&pdev->dev.kobj, msi_irq_groups); >+ if (ret) >+ return ret; >+ pdev->msi_irq_groups = msi_irq_groups; >+ >+ return 0; > } > > /** >@@ -925,8 +927,6 @@ void pci_disable_msi(struct pci_dev *dev > > pci_msi_shutdown(dev); > free_msi_irqs(dev); >- kset_unregister(dev->msi_kset); >- dev->msi_kset = NULL; > } > EXPORT_SYMBOL(pci_disable_msi); > >@@ -1023,8 +1023,6 @@ void pci_disable_msix(struct pci_dev *de > > pci_msix_shutdown(dev); > free_msi_irqs(dev); >- kset_unregister(dev->msi_kset); >- dev->msi_kset = NULL; > } > EXPORT_SYMBOL(pci_disable_msix); > >--- a/include/linux/pci.h >+++ b/include/linux/pci.h >@@ -351,7 +351,7 @@ struct pci_dev { > struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */ > #ifdef CONFIG_PCI_MSI > struct list_head msi_list; >- struct kset *msi_kset; >+ const struct attribute_group **msi_irq_groups; > #endif > struct pci_vpd *vpd; > #ifdef CONFIG_PCI_ATS -- 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 Fri, Nov 29, 2013 at 10:53 AM, Greg KH <greg@kroah.com> wrote: > On Fri, Nov 29, 2013 at 10:41:37AM +0100, Veaceslav Falico wrote: >> On Wed, Nov 27, 2013 at 10:46:52AM -0800, Greg Kroah-Hartman wrote: >> >From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> >> > >> >The PCI MSI sysfs code is a mess with kobjects for things that don't >> >really need to be kobjects. This patch creates attributes dynamically >> >for the MSI interrupts instead of using kobjects. >> > >> >Note, this removes a directory from the current MSI interrupt sysfs >> >code: >> > >> >old MSI kobjects: >> >pci_device >> > └── msi_irqs >> > └── 40 >> > └── mode >> > >> >new MSI attributes: >> >pci_device >> > └── msi_irqs >> > └── 40 >> > >> >As there was only one file "mode" with the kobject model, the interrupt >> >number is now a file that returns the "mode" of the interrupt (msi vs. >> >msix). >> > >> >Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> >> >> Works like a charm for me. >> >> FWIW, >> >> Reviewed-by: Veaceslav Falico <vfalico@redhat.com> > > On Thu, Nov 28, 2013 at 10:14:19PM -0500, Neil Horman wrote: >> ACK, Testing with git-head irqbalance on F19 with this patch and it works fine. >> >> Thanks! >> Acked-by: Neil Horman <nhorman@tuxdriver.com> > > Great, thanks for both of you testing this. > > Bjorn, any objection to take this through your tree for 3.14-rc1? Nope, I don't object at all. We probably should update Documentation/ABI/testing/sysfs-bus-pci at the same time, though. 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
On Mon, Dec 02, 2013 at 06:24:06PM -0700, Bjorn Helgaas wrote: > On Fri, Nov 29, 2013 at 10:53 AM, Greg KH <greg@kroah.com> wrote: > > On Fri, Nov 29, 2013 at 10:41:37AM +0100, Veaceslav Falico wrote: > >> On Wed, Nov 27, 2013 at 10:46:52AM -0800, Greg Kroah-Hartman wrote: > >> >From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > >> > > >> >The PCI MSI sysfs code is a mess with kobjects for things that don't > >> >really need to be kobjects. This patch creates attributes dynamically > >> >for the MSI interrupts instead of using kobjects. > >> > > >> >Note, this removes a directory from the current MSI interrupt sysfs > >> >code: > >> > > >> >old MSI kobjects: > >> >pci_device > >> > └── msi_irqs > >> > └── 40 > >> > └── mode > >> > > >> >new MSI attributes: > >> >pci_device > >> > └── msi_irqs > >> > └── 40 > >> > > >> >As there was only one file "mode" with the kobject model, the interrupt > >> >number is now a file that returns the "mode" of the interrupt (msi vs. > >> >msix). > >> > > >> >Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > >> > >> Works like a charm for me. > >> > >> FWIW, > >> > >> Reviewed-by: Veaceslav Falico <vfalico@redhat.com> > > > > On Thu, Nov 28, 2013 at 10:14:19PM -0500, Neil Horman wrote: > >> ACK, Testing with git-head irqbalance on F19 with this patch and it works fine. > >> > >> Thanks! > >> Acked-by: Neil Horman <nhorman@tuxdriver.com> > > > > Great, thanks for both of you testing this. > > > > Bjorn, any objection to take this through your tree for 3.14-rc1? > > Nope, I don't object at all. We probably should update > Documentation/ABI/testing/sysfs-bus-pci at the same time, though. Now sent. thanks, greg k-h -- 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 Wed, Nov 27, 2013 at 11:46 AM, Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote: > From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > > The PCI MSI sysfs code is a mess with kobjects for things that don't > really need to be kobjects. This patch creates attributes dynamically > for the MSI interrupts instead of using kobjects. > > Note, this removes a directory from the current MSI interrupt sysfs > code: > > old MSI kobjects: > pci_device > └── msi_irqs > └── 40 > └── mode > > new MSI attributes: > pci_device > └── msi_irqs > └── 40 > > As there was only one file "mode" with the kobject model, the interrupt > number is now a file that returns the "mode" of the interrupt (msi vs. > msix). > > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> I added the acks from Neil and Veaceslav, folded in the Documentation/ABI update, and applied the whole thing to my pci/misc branch for v3.14. Thanks! Bjorn > --- > > Neil, can you test this patch to see if irqbalance works as-is or not? > > thanks, > > greg k-h > > drivers/pci/msi.c | 152 +++++++++++++++++++++++++--------------------------- > include/linux/pci.h | 2 > 2 files changed, 76 insertions(+), 78 deletions(-) > > --- a/drivers/pci/msi.c > +++ b/drivers/pci/msi.c > @@ -363,6 +363,9 @@ void write_msi_msg(unsigned int irq, str > static void free_msi_irqs(struct pci_dev *dev) > { > struct msi_desc *entry, *tmp; > + struct attribute **msi_attrs; > + struct device_attribute *dev_attr; > + int count = 0; > > list_for_each_entry(entry, &dev->msi_list, list) { > int i, nvec; > @@ -398,6 +401,22 @@ static void free_msi_irqs(struct pci_dev > list_del(&entry->list); > kfree(entry); > } > + > + if (dev->msi_irq_groups) { > + sysfs_remove_groups(&dev->dev.kobj, dev->msi_irq_groups); > + msi_attrs = dev->msi_irq_groups[0]->attrs; > + list_for_each_entry(entry, &dev->msi_list, list) { > + dev_attr = container_of(msi_attrs[count], > + struct device_attribute, attr); > + kfree(dev_attr->attr.name); > + kfree(dev_attr); > + ++count; > + } > + kfree(msi_attrs); > + kfree(dev->msi_irq_groups[0]); > + kfree(dev->msi_irq_groups); > + dev->msi_irq_groups = NULL; > + } > } > > static struct msi_desc *alloc_msi_entry(struct pci_dev *dev) > @@ -471,96 +490,79 @@ void pci_restore_msi_state(struct pci_de > } > EXPORT_SYMBOL_GPL(pci_restore_msi_state); > > - > -#define to_msi_attr(obj) container_of(obj, struct msi_attribute, attr) > -#define to_msi_desc(obj) container_of(obj, struct msi_desc, kobj) > - > -struct msi_attribute { > - struct attribute attr; > - ssize_t (*show)(struct msi_desc *entry, struct msi_attribute *attr, > - char *buf); > - ssize_t (*store)(struct msi_desc *entry, struct msi_attribute *attr, > - const char *buf, size_t count); > -}; > - > -static ssize_t show_msi_mode(struct msi_desc *entry, struct msi_attribute *atr, > +static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr, > char *buf) > { > - return sprintf(buf, "%s\n", entry->msi_attrib.is_msix ? "msix" : "msi"); > -} > - > -static ssize_t msi_irq_attr_show(struct kobject *kobj, > - struct attribute *attr, char *buf) > -{ > - struct msi_attribute *attribute = to_msi_attr(attr); > - struct msi_desc *entry = to_msi_desc(kobj); > - > - if (!attribute->show) > - return -EIO; > - > - return attribute->show(entry, attribute, buf); > -} > - > -static const struct sysfs_ops msi_irq_sysfs_ops = { > - .show = msi_irq_attr_show, > -}; > - > -static struct msi_attribute mode_attribute = > - __ATTR(mode, S_IRUGO, show_msi_mode, NULL); > - > + struct pci_dev *pdev = to_pci_dev(dev); > + struct msi_desc *entry; > + unsigned long irq; > + int retval; > > -static struct attribute *msi_irq_default_attrs[] = { > - &mode_attribute.attr, > - NULL > -}; > + retval = kstrtoul(attr->attr.name, 10, &irq); > + if (retval) > + return retval; > > -static void msi_kobj_release(struct kobject *kobj) > -{ > - struct msi_desc *entry = to_msi_desc(kobj); > - > - pci_dev_put(entry->dev); > + list_for_each_entry(entry, &pdev->msi_list, list) { > + if (entry->irq == irq) { > + return sprintf(buf, "%s\n", > + entry->msi_attrib.is_msix ? "msix" : "msi"); > + } > + } > + return -ENODEV; > } > > -static struct kobj_type msi_irq_ktype = { > - .release = msi_kobj_release, > - .sysfs_ops = &msi_irq_sysfs_ops, > - .default_attrs = msi_irq_default_attrs, > -}; > - > static int populate_msi_sysfs(struct pci_dev *pdev) > { > + struct attribute **msi_attrs; > + struct device_attribute *msi_dev_attr; > + struct attribute_group *msi_irq_group; > + const struct attribute_group **msi_irq_groups; > struct msi_desc *entry; > - struct kobject *kobj; > int ret; > + int num_msi = 0; > int count = 0; > > - pdev->msi_kset = kset_create_and_add("msi_irqs", NULL, &pdev->dev.kobj); > - if (!pdev->msi_kset) > - return -ENOMEM; > - > + /* Determine how many msi entries we have */ > list_for_each_entry(entry, &pdev->msi_list, list) { > - kobj = &entry->kobj; > - kobj->kset = pdev->msi_kset; > - pci_dev_get(pdev); > - ret = kobject_init_and_add(kobj, &msi_irq_ktype, NULL, > - "%u", entry->irq); > - if (ret) > - goto out_unroll; > - > - count++; > + ++num_msi; > } > + if (!num_msi) > + return 0; > > - return 0; > - > -out_unroll: > + /* Dynamically create the MSI attributes for the PCI device */ > + msi_attrs = kzalloc(sizeof(void *) * (num_msi + 1), GFP_KERNEL); > + if (!msi_attrs) > + return -ENOMEM; > list_for_each_entry(entry, &pdev->msi_list, list) { > - if (!count) > - break; > - kobject_del(&entry->kobj); > - kobject_put(&entry->kobj); > - count--; > + char *name = kmalloc(20, GFP_KERNEL); > + msi_dev_attr = kzalloc(sizeof(*msi_dev_attr), GFP_KERNEL); > + if (!msi_dev_attr) > + return -ENOMEM; > + sprintf(name, "%d", entry->irq); > + msi_dev_attr->attr.name = name; > + msi_dev_attr->attr.mode = S_IRUGO; > + msi_dev_attr->show = msi_mode_show; > + msi_attrs[count] = &msi_dev_attr->attr; > + ++count; > } > - return ret; > + > + msi_irq_group = kzalloc(sizeof(*msi_irq_group), GFP_KERNEL); > + if (!msi_irq_group) > + return -ENOMEM; > + msi_irq_group->name = "msi_irqs"; > + msi_irq_group->attrs = msi_attrs; > + > + msi_irq_groups = kzalloc(sizeof(void *) * 2, GFP_KERNEL); > + if (!msi_irq_groups) > + return -ENOMEM; > + msi_irq_groups[0] = msi_irq_group; > + > + ret = sysfs_create_groups(&pdev->dev.kobj, msi_irq_groups); > + if (ret) > + return ret; > + pdev->msi_irq_groups = msi_irq_groups; > + > + return 0; > } > > /** > @@ -925,8 +927,6 @@ void pci_disable_msi(struct pci_dev *dev > > pci_msi_shutdown(dev); > free_msi_irqs(dev); > - kset_unregister(dev->msi_kset); > - dev->msi_kset = NULL; > } > EXPORT_SYMBOL(pci_disable_msi); > > @@ -1023,8 +1023,6 @@ void pci_disable_msix(struct pci_dev *de > > pci_msix_shutdown(dev); > free_msi_irqs(dev); > - kset_unregister(dev->msi_kset); > - dev->msi_kset = NULL; > } > EXPORT_SYMBOL(pci_disable_msix); > > --- a/include/linux/pci.h > +++ b/include/linux/pci.h > @@ -351,7 +351,7 @@ struct pci_dev { > struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */ > #ifdef CONFIG_PCI_MSI > struct list_head msi_list; > - struct kset *msi_kset; > + const struct attribute_group **msi_irq_groups; > #endif > struct pci_vpd *vpd; > #ifdef CONFIG_PCI_ATS -- 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
--- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -363,6 +363,9 @@ void write_msi_msg(unsigned int irq, str static void free_msi_irqs(struct pci_dev *dev) { struct msi_desc *entry, *tmp; + struct attribute **msi_attrs; + struct device_attribute *dev_attr; + int count = 0; list_for_each_entry(entry, &dev->msi_list, list) { int i, nvec; @@ -398,6 +401,22 @@ static void free_msi_irqs(struct pci_dev list_del(&entry->list); kfree(entry); } + + if (dev->msi_irq_groups) { + sysfs_remove_groups(&dev->dev.kobj, dev->msi_irq_groups); + msi_attrs = dev->msi_irq_groups[0]->attrs; + list_for_each_entry(entry, &dev->msi_list, list) { + dev_attr = container_of(msi_attrs[count], + struct device_attribute, attr); + kfree(dev_attr->attr.name); + kfree(dev_attr); + ++count; + } + kfree(msi_attrs); + kfree(dev->msi_irq_groups[0]); + kfree(dev->msi_irq_groups); + dev->msi_irq_groups = NULL; + } } static struct msi_desc *alloc_msi_entry(struct pci_dev *dev) @@ -471,96 +490,79 @@ void pci_restore_msi_state(struct pci_de } EXPORT_SYMBOL_GPL(pci_restore_msi_state); - -#define to_msi_attr(obj) container_of(obj, struct msi_attribute, attr) -#define to_msi_desc(obj) container_of(obj, struct msi_desc, kobj) - -struct msi_attribute { - struct attribute attr; - ssize_t (*show)(struct msi_desc *entry, struct msi_attribute *attr, - char *buf); - ssize_t (*store)(struct msi_desc *entry, struct msi_attribute *attr, - const char *buf, size_t count); -}; - -static ssize_t show_msi_mode(struct msi_desc *entry, struct msi_attribute *atr, +static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%s\n", entry->msi_attrib.is_msix ? "msix" : "msi"); -} - -static ssize_t msi_irq_attr_show(struct kobject *kobj, - struct attribute *attr, char *buf) -{ - struct msi_attribute *attribute = to_msi_attr(attr); - struct msi_desc *entry = to_msi_desc(kobj); - - if (!attribute->show) - return -EIO; - - return attribute->show(entry, attribute, buf); -} - -static const struct sysfs_ops msi_irq_sysfs_ops = { - .show = msi_irq_attr_show, -}; - -static struct msi_attribute mode_attribute = - __ATTR(mode, S_IRUGO, show_msi_mode, NULL); - + struct pci_dev *pdev = to_pci_dev(dev); + struct msi_desc *entry; + unsigned long irq; + int retval; -static struct attribute *msi_irq_default_attrs[] = { - &mode_attribute.attr, - NULL -}; + retval = kstrtoul(attr->attr.name, 10, &irq); + if (retval) + return retval; -static void msi_kobj_release(struct kobject *kobj) -{ - struct msi_desc *entry = to_msi_desc(kobj); - - pci_dev_put(entry->dev); + list_for_each_entry(entry, &pdev->msi_list, list) { + if (entry->irq == irq) { + return sprintf(buf, "%s\n", + entry->msi_attrib.is_msix ? "msix" : "msi"); + } + } + return -ENODEV; } -static struct kobj_type msi_irq_ktype = { - .release = msi_kobj_release, - .sysfs_ops = &msi_irq_sysfs_ops, - .default_attrs = msi_irq_default_attrs, -}; - static int populate_msi_sysfs(struct pci_dev *pdev) { + struct attribute **msi_attrs; + struct device_attribute *msi_dev_attr; + struct attribute_group *msi_irq_group; + const struct attribute_group **msi_irq_groups; struct msi_desc *entry; - struct kobject *kobj; int ret; + int num_msi = 0; int count = 0; - pdev->msi_kset = kset_create_and_add("msi_irqs", NULL, &pdev->dev.kobj); - if (!pdev->msi_kset) - return -ENOMEM; - + /* Determine how many msi entries we have */ list_for_each_entry(entry, &pdev->msi_list, list) { - kobj = &entry->kobj; - kobj->kset = pdev->msi_kset; - pci_dev_get(pdev); - ret = kobject_init_and_add(kobj, &msi_irq_ktype, NULL, - "%u", entry->irq); - if (ret) - goto out_unroll; - - count++; + ++num_msi; } + if (!num_msi) + return 0; - return 0; - -out_unroll: + /* Dynamically create the MSI attributes for the PCI device */ + msi_attrs = kzalloc(sizeof(void *) * (num_msi + 1), GFP_KERNEL); + if (!msi_attrs) + return -ENOMEM; list_for_each_entry(entry, &pdev->msi_list, list) { - if (!count) - break; - kobject_del(&entry->kobj); - kobject_put(&entry->kobj); - count--; + char *name = kmalloc(20, GFP_KERNEL); + msi_dev_attr = kzalloc(sizeof(*msi_dev_attr), GFP_KERNEL); + if (!msi_dev_attr) + return -ENOMEM; + sprintf(name, "%d", entry->irq); + msi_dev_attr->attr.name = name; + msi_dev_attr->attr.mode = S_IRUGO; + msi_dev_attr->show = msi_mode_show; + msi_attrs[count] = &msi_dev_attr->attr; + ++count; } - return ret; + + msi_irq_group = kzalloc(sizeof(*msi_irq_group), GFP_KERNEL); + if (!msi_irq_group) + return -ENOMEM; + msi_irq_group->name = "msi_irqs"; + msi_irq_group->attrs = msi_attrs; + + msi_irq_groups = kzalloc(sizeof(void *) * 2, GFP_KERNEL); + if (!msi_irq_groups) + return -ENOMEM; + msi_irq_groups[0] = msi_irq_group; + + ret = sysfs_create_groups(&pdev->dev.kobj, msi_irq_groups); + if (ret) + return ret; + pdev->msi_irq_groups = msi_irq_groups; + + return 0; } /** @@ -925,8 +927,6 @@ void pci_disable_msi(struct pci_dev *dev pci_msi_shutdown(dev); free_msi_irqs(dev); - kset_unregister(dev->msi_kset); - dev->msi_kset = NULL; } EXPORT_SYMBOL(pci_disable_msi); @@ -1023,8 +1023,6 @@ void pci_disable_msix(struct pci_dev *de pci_msix_shutdown(dev); free_msi_irqs(dev); - kset_unregister(dev->msi_kset); - dev->msi_kset = NULL; } EXPORT_SYMBOL(pci_disable_msix); --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -351,7 +351,7 @@ struct pci_dev { struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */ #ifdef CONFIG_PCI_MSI struct list_head msi_list; - struct kset *msi_kset; + const struct attribute_group **msi_irq_groups; #endif struct pci_vpd *vpd; #ifdef CONFIG_PCI_ATS