Commit-ID: 61e1c5905290efe48bacda5e342d4af4cb1b923b Gitweb: http://git.kernel.org/tip/61e1c5905290efe48bacda5e342d4af4cb1b923b Author: Christoph Hellwig <h...@lst.de> AuthorDate: Tue, 8 Nov 2016 17:15:04 -0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Wed, 9 Nov 2016 08:25:09 +0100
PCI/MSI: Propagate IRQ affinity description through the MSI code No API change yet, just pass it down all the way from pci_alloc_irq_vectors() to the core MSI code. Signed-off-by: Christoph Hellwig <h...@lst.de> Reviewed-by: Hannes Reinecke <h...@suse.com> Reviewed-by: Johannes Thumshirn <jthumsh...@suse.de> Acked-by: Bjorn Helgaas <bhelg...@google.com> Acked-by: Jens Axboe <ax...@kernel.dk> Cc: linux-bl...@vger.kernel.org Cc: linux-...@vger.kernel.org Link: http://lkml.kernel.org/r/1478654107-7384-5-git-send-email-...@lst.de Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- drivers/pci/msi.c | 66 +++++++++++++++++++++++++++---------------------------- 1 file changed, 33 insertions(+), 33 deletions(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index f4a108b..512f388 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -551,15 +551,14 @@ error_attrs: } static struct msi_desc * -msi_setup_entry(struct pci_dev *dev, int nvec, bool affinity) +msi_setup_entry(struct pci_dev *dev, int nvec, const struct irq_affinity *affd) { - static const struct irq_affinity default_affd; struct cpumask *masks = NULL; struct msi_desc *entry; u16 control; - if (affinity) { - masks = irq_create_affinity_masks(nvec, &default_affd); + if (affd) { + masks = irq_create_affinity_masks(nvec, affd); if (!masks) pr_err("Unable to allocate affinity masks, ignoring\n"); } @@ -619,7 +618,8 @@ static int msi_verify_entries(struct pci_dev *dev) * an error, and a positive return value indicates the number of interrupts * which could have been allocated. */ -static int msi_capability_init(struct pci_dev *dev, int nvec, bool affinity) +static int msi_capability_init(struct pci_dev *dev, int nvec, + const struct irq_affinity *affd) { struct msi_desc *entry; int ret; @@ -627,7 +627,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec, bool affinity) pci_msi_set_enable(dev, 0); /* Disable MSI during set up */ - entry = msi_setup_entry(dev, nvec, affinity); + entry = msi_setup_entry(dev, nvec, affd); if (!entry) return -ENOMEM; @@ -691,15 +691,14 @@ static void __iomem *msix_map_region(struct pci_dev *dev, unsigned nr_entries) static int msix_setup_entries(struct pci_dev *dev, void __iomem *base, struct msix_entry *entries, int nvec, - bool affinity) + const struct irq_affinity *affd) { - static const struct irq_affinity default_affd; struct cpumask *curmsk, *masks = NULL; struct msi_desc *entry; int ret, i; - if (affinity) { - masks = irq_create_affinity_masks(nvec, &default_affd); + if (affd) { + masks = irq_create_affinity_masks(nvec, affd); if (!masks) pr_err("Unable to allocate affinity masks, ignoring\n"); } @@ -755,14 +754,14 @@ static void msix_program_entries(struct pci_dev *dev, * @dev: pointer to the pci_dev data structure of MSI-X device function * @entries: pointer to an array of struct msix_entry entries * @nvec: number of @entries - * @affinity: flag to indicate cpu irq affinity mask should be set + * @affd: Optional pointer to enable automatic affinity assignement * * Setup the MSI-X capability structure of device function with a * single MSI-X irq. A return of zero indicates the successful setup of * requested MSI-X entries with allocated irqs or non-zero for otherwise. **/ static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries, - int nvec, bool affinity) + int nvec, const struct irq_affinity *affd) { int ret; u16 control; @@ -777,7 +776,7 @@ static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries, if (!base) return -ENOMEM; - ret = msix_setup_entries(dev, base, entries, nvec, affinity); + ret = msix_setup_entries(dev, base, entries, nvec, affd); if (ret) return ret; @@ -958,7 +957,7 @@ int pci_msix_vec_count(struct pci_dev *dev) EXPORT_SYMBOL(pci_msix_vec_count); static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, - int nvec, bool affinity) + int nvec, const struct irq_affinity *affd) { int nr_entries; int i, j; @@ -990,7 +989,7 @@ static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, dev_info(&dev->dev, "can't enable MSI-X (MSI IRQ already assigned)\n"); return -EINVAL; } - return msix_capability_init(dev, entries, nvec, affinity); + return msix_capability_init(dev, entries, nvec, affd); } /** @@ -1010,7 +1009,7 @@ static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, **/ int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec) { - return __pci_enable_msix(dev, entries, nvec, false); + return __pci_enable_msix(dev, entries, nvec, NULL); } EXPORT_SYMBOL(pci_enable_msix); @@ -1061,10 +1060,8 @@ int pci_msi_enabled(void) EXPORT_SYMBOL(pci_msi_enabled); static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, - unsigned int flags) + const struct irq_affinity *affd) { - static const struct irq_affinity default_affd; - bool affinity = flags & PCI_IRQ_AFFINITY; int nvec; int rc; @@ -1093,13 +1090,13 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, nvec = maxvec; for (;;) { - if (affinity) { - nvec = irq_calc_affinity_vectors(nvec, &default_affd); + if (affd) { + nvec = irq_calc_affinity_vectors(nvec, affd); if (nvec < minvec) return -ENOSPC; } - rc = msi_capability_init(dev, nvec, affinity); + rc = msi_capability_init(dev, nvec, affd); if (rc == 0) return nvec; @@ -1126,29 +1123,27 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, **/ int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec) { - return __pci_enable_msi_range(dev, minvec, maxvec, 0); + return __pci_enable_msi_range(dev, minvec, maxvec, NULL); } EXPORT_SYMBOL(pci_enable_msi_range); static int __pci_enable_msix_range(struct pci_dev *dev, - struct msix_entry *entries, int minvec, int maxvec, - unsigned int flags) + struct msix_entry *entries, int minvec, + int maxvec, const struct irq_affinity *affd) { - static const struct irq_affinity default_affd; - bool affinity = flags & PCI_IRQ_AFFINITY; int rc, nvec = maxvec; if (maxvec < minvec) return -ERANGE; for (;;) { - if (affinity) { - nvec = irq_calc_affinity_vectors(nvec, &default_affd); + if (affd) { + nvec = irq_calc_affinity_vectors(nvec, affd); if (nvec < minvec) return -ENOSPC; } - rc = __pci_enable_msix(dev, entries, nvec, affinity); + rc = __pci_enable_msix(dev, entries, nvec, affd); if (rc == 0) return nvec; @@ -1179,7 +1174,7 @@ static int __pci_enable_msix_range(struct pci_dev *dev, int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int minvec, int maxvec) { - return __pci_enable_msix_range(dev, entries, minvec, maxvec, 0); + return __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL); } EXPORT_SYMBOL(pci_enable_msix_range); @@ -1203,17 +1198,22 @@ EXPORT_SYMBOL(pci_enable_msix_range); int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs, unsigned int max_vecs, unsigned int flags) { + static const struct irq_affinity msi_default_affd; + const struct irq_affinity *affd = NULL; int vecs = -ENOSPC; + if (flags & PCI_IRQ_AFFINITY) + affd = &msi_default_affd; + if (flags & PCI_IRQ_MSIX) { vecs = __pci_enable_msix_range(dev, NULL, min_vecs, max_vecs, - flags); + affd); if (vecs > 0) return vecs; } if (flags & PCI_IRQ_MSI) { - vecs = __pci_enable_msi_range(dev, min_vecs, max_vecs, flags); + vecs = __pci_enable_msi_range(dev, min_vecs, max_vecs, affd); if (vecs > 0) return vecs; }
