From: Dave Jiang <dave.jiang@intel.com>
To: vkoul@kernel.org, megha.dey@intel.com, maz@kernel.org,
bhelgaas@google.com, rafael@kernel.org,
gregkh@linuxfoundation.org, tglx@linutronix.de, hpa@zytor.com,
alex.williamson@redhat.com, jacob.jun.pan@intel.com,
ashok.raj@intel.com, jgg@mellanox.com, yi.l.liu@intel.com,
baolu.lu@intel.com, kevin.tian@intel.com,
sanjay.k.kumar@intel.com, tony.luck@intel.com,
jing.lin@intel.com, dan.j.williams@intel.com,
kwankhede@nvidia.com, eric.auger@redhat.com, parav@mellanox.com,
jgg@mellanox.com, rafael@kernel.org, dave.hansen@intel.com,
netanelg@mellanox.com, shahafs@mellanox.com,
yan.y.zhao@linux.intel.com, pbonzini@redhat.com,
samuel.ortiz@intel.com, mona.hossain@intel.com
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
x86@kernel.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH RFC v2 04/18] irq/dev-msi: Introduce APIs to allocate/free dev-msi interrupts
Date: Tue, 21 Jul 2020 09:02:41 -0700 [thread overview]
Message-ID: <159534736176.28840.5547007059232964457.stgit@djiang5-desk3.ch.intel.com> (raw)
In-Reply-To: <159534667974.28840.2045034360240786644.stgit@djiang5-desk3.ch.intel.com>
From: Megha Dey <megha.dey@intel.com>
The dev-msi interrupts are to be allocated/freed only for custom devices,
not standard PCI-MSIX devices.
These interrupts are device-defined and they are distinct from the already
existing msi interrupts:
pci-msi: Standard PCI MSI/MSI-X setup format
platform-msi: Platform custom, but device-driver opaque MSI setup/control
arch-msi: fallback for devices not assigned to the generic PCI domain
dev-msi: device defined IRQ domain for ancillary devices. For e.g. DSA
portal devices use device specific IMS(Interrupt message store) interrupts.
dev-msi interrupts are represented by their own device-type. That means
dev->msi_list is never contended for different interrupt types. It
will either be all PCI-MSI or all device-defined.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Megha Dey <megha.dey@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/base/dev-msi.c | 23 +++++++++++++++++++++++
include/linux/msi.h | 4 ++++
2 files changed, 27 insertions(+)
diff --git a/drivers/base/dev-msi.c b/drivers/base/dev-msi.c
index 43d6ed3ba10f..4cc75bfd62da 100644
--- a/drivers/base/dev-msi.c
+++ b/drivers/base/dev-msi.c
@@ -145,3 +145,26 @@ struct irq_domain *create_remap_dev_msi_irq_domain(struct irq_domain *parent,
return domain;
}
#endif
+
+int dev_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
+ const struct platform_msi_ops *platform_ops)
+{
+ if (!dev->msi_domain) {
+ dev->msi_domain = dev_msi_default_domain;
+ } else if (dev->msi_domain != dev_msi_default_domain) {
+ dev_WARN_ONCE(dev, 1, "already registered to another irq domain?\n");
+ return -ENXIO;
+ }
+
+ return platform_msi_domain_alloc_irqs(dev, nvec, platform_ops);
+}
+EXPORT_SYMBOL_GPL(dev_msi_domain_alloc_irqs);
+
+void dev_msi_domain_free_irqs(struct device *dev)
+{
+ if (dev->msi_domain != dev_msi_default_domain)
+ dev_WARN_ONCE(dev, 1, "registered to incorrect irq domain?\n");
+
+ platform_msi_domain_free_irqs(dev);
+}
+EXPORT_SYMBOL_GPL(dev_msi_domain_free_irqs);
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 7098ba566bcd..9dde8a43a0f7 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -381,6 +381,10 @@ void platform_msi_mask_irq(struct irq_data *data);
int dev_msi_prepare(struct irq_domain *domain, struct device *dev,
int nvec, msi_alloc_info_t *arg);
+
+int dev_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
+ const struct platform_msi_ops *platform_ops);
+void dev_msi_domain_free_irqs(struct device *dev);
#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
next prev parent reply other threads:[~2020-07-21 16:02 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-21 16:02 [PATCH RFC v2 00/18] Add VFIO mediated device support and DEV-MSI support for the idxd driver Dave Jiang
2020-07-21 16:02 ` [PATCH RFC v2 01/18] platform-msi: Introduce platform_msi_ops Dave Jiang
2020-07-21 16:02 ` [PATCH RFC v2 02/18] irq/dev-msi: Add support for a new DEV_MSI irq domain Dave Jiang
2020-07-21 16:13 ` Jason Gunthorpe
2020-07-22 16:50 ` Dey, Megha
2020-07-22 18:52 ` Marc Zyngier
2020-07-22 19:59 ` Jason Gunthorpe
2020-07-23 8:51 ` Marc Zyngier
2020-07-24 0:16 ` Jason Gunthorpe
2020-07-24 0:36 ` Thomas Gleixner
2020-08-05 19:18 ` Dey, Megha
2020-08-05 22:15 ` Jason Gunthorpe
2020-08-05 22:36 ` Dey, Megha
2020-08-05 22:53 ` Jason Gunthorpe
2020-08-06 0:13 ` Dey, Megha
2020-08-06 0:19 ` Jason Gunthorpe
2020-08-06 0:32 ` Dey, Megha
2020-08-06 0:46 ` Jason Gunthorpe
2020-08-06 17:10 ` Thomas Gleixner
2020-08-06 17:58 ` Dey, Megha
2020-08-06 20:21 ` Thomas Gleixner
2020-08-06 22:27 ` Dey, Megha
2020-08-07 8:48 ` Thomas Gleixner
2020-08-07 12:06 ` Jason Gunthorpe
2020-08-07 12:38 ` gregkh
2020-08-07 13:34 ` Jason Gunthorpe
2020-08-07 16:47 ` Thomas Gleixner
2020-08-07 17:54 ` Dey, Megha
2020-08-07 18:39 ` Jason Gunthorpe
2020-08-07 20:31 ` Dey, Megha
2020-08-08 19:47 ` Thomas Gleixner
2020-08-10 21:46 ` Thomas Gleixner
2020-08-11 9:53 ` Thomas Gleixner
2020-08-11 18:46 ` Dey, Megha
2020-08-11 21:25 ` Thomas Gleixner
2020-08-11 18:39 ` Dey, Megha
2020-08-11 22:39 ` Thomas Gleixner
2020-08-07 15:22 ` Thomas Gleixner
2020-08-05 18:55 ` Dey, Megha
2020-07-21 16:02 ` [PATCH RFC v2 03/18] irq/dev-msi: Create IR-DEV-MSI " Dave Jiang
2020-07-21 16:21 ` Jason Gunthorpe
2020-07-22 17:03 ` Dey, Megha
2020-07-22 17:33 ` Jason Gunthorpe
2020-07-22 20:44 ` Thomas Gleixner
2020-08-05 19:02 ` Dey, Megha
2020-07-21 16:02 ` Dave Jiang [this message]
2020-07-21 16:25 ` [PATCH RFC v2 04/18] irq/dev-msi: Introduce APIs to allocate/free dev-msi interrupts Jason Gunthorpe
2020-07-22 17:05 ` Dey, Megha
2020-07-22 17:35 ` Jason Gunthorpe
2020-08-05 20:19 ` Dey, Megha
2020-07-21 16:02 ` [PATCH RFC v2 05/18] dmaengine: idxd: add support for readonly config devices Dave Jiang
2020-07-21 16:02 ` [PATCH RFC v2 06/18] dmaengine: idxd: add interrupt handle request support Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 07/18] dmaengine: idxd: add DEV-MSI support in base driver Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 08/18] dmaengine: idxd: add device support functions in prep for mdev Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 09/18] dmaengine: idxd: add basic mdev registration and helper functions Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 10/18] dmaengine: idxd: add emulation rw routines Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 11/18] dmaengine: idxd: prep for virtual device commands Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 12/18] dmaengine: idxd: virtual device commands emulation Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 13/18] dmaengine: idxd: ims setup for the vdcm Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 14/18] dmaengine: idxd: add mdev type as a new wq type Dave Jiang
2020-07-21 16:03 ` [PATCH RFC v2 15/18] dmaengine: idxd: add dedicated wq mdev type Dave Jiang
2020-07-21 16:04 ` [PATCH RFC v2 16/18] dmaengine: idxd: add new wq state for mdev Dave Jiang
2020-07-21 16:04 ` [PATCH RFC v2 17/18] dmaengine: idxd: add error notification from host driver to mediated device Dave Jiang
2020-07-21 16:04 ` [PATCH RFC v2 18/18] dmaengine: idxd: add ABI documentation for mediated device support Dave Jiang
2020-07-21 16:28 ` [PATCH RFC v2 00/18] Add VFIO mediated device support and DEV-MSI support for the idxd driver Greg KH
2020-07-21 17:17 ` Dave Jiang
2020-07-21 21:35 ` Dan Williams
2020-07-21 16:45 ` Jason Gunthorpe
2020-07-21 18:00 ` Dave Jiang
2020-07-22 17:31 ` Dey, Megha
2020-07-22 18:16 ` Jason Gunthorpe
2020-07-21 23:54 ` Tian, Kevin
2020-07-24 0:19 ` Jason Gunthorpe
2020-08-06 1:22 ` Alex Williamson
2020-08-07 12:19 ` Jason Gunthorpe
2020-08-10 7:32 ` Tian, Kevin
2020-08-11 17:00 ` Alex Williamson
2020-08-12 1:58 ` Tian, Kevin
2020-08-12 2:36 ` Alex Williamson
2020-08-12 3:35 ` Tian, Kevin
2020-08-12 3:28 ` Jason Wang
2020-08-12 4:05 ` Tian, Kevin
2020-08-13 4:33 ` Jason Wang
2020-08-13 5:26 ` Tian, Kevin
2020-08-13 6:01 ` Jason Wang
2020-08-14 13:23 ` Jason Gunthorpe
2020-08-17 2:24 ` Tian, Kevin
2020-08-14 13:35 ` Jason Gunthorpe
2020-08-17 2:12 ` Tian, Kevin
2020-08-18 0:43 ` Jason Gunthorpe
2020-08-18 1:09 ` Tian, Kevin
2020-08-18 11:50 ` Jason Gunthorpe
2020-08-18 16:27 ` Paolo Bonzini
2020-08-18 16:49 ` Jason Gunthorpe
2020-08-18 17:05 ` Paolo Bonzini
2020-08-18 17:18 ` Jason Gunthorpe
2020-08-19 7:29 ` Tian, Kevin
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