From: Megha Dey <megha.dey@linux.intel.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org,
linux-pci@vger.kernel.org, maz@kernel.org, bhelgaas@google.com,
rafael@kernel.org, gregkh@linuxfoundation.org,
tglx@linutronix.de, hpa@zytor.com, alex.williamson@redhat.com,
jgg@mellanox.com
Cc: ashok.raj@intel.com, megha.dey@intel.com,
jacob.jun.pan@intel.com, Megha Dey <megha.dey@linux.intel.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>,
Sanjay Kumar <sanjay.k.kumar@intel.com>
Subject: [RFC V1 7/7] ims: Add the set_desc callback
Date: Thu, 12 Sep 2019 18:32:08 -0700 [thread overview]
Message-ID: <1568338328-22458-8-git-send-email-megha.dey@linux.intel.com> (raw)
In-Reply-To: <1568338328-22458-1-git-send-email-megha.dey@linux.intel.com>
Add the set_desc callback to the ims domain ops.
The set_desc callback is used to find a unique hwirq number from a given
domain.
Each mdev can have a maximum of 2048 IMS interrupts.
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
---
arch/x86/kernel/apic/ims.c | 7 +++++++
drivers/base/ims-msi.c | 9 +++++++++
include/linux/msi.h | 1 +
3 files changed, 17 insertions(+)
diff --git a/arch/x86/kernel/apic/ims.c b/arch/x86/kernel/apic/ims.c
index a539666..7e36571 100644
--- a/arch/x86/kernel/apic/ims.c
+++ b/arch/x86/kernel/apic/ims.c
@@ -76,11 +76,18 @@ int dev_ims_prepare(struct irq_domain *domain, struct device *dev, int nvec,
}
EXPORT_SYMBOL_GPL(dev_ims_prepare);
+void dev_ims_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc)
+{
+ arg->msi_hwirq = dev_ims_calc_hwirq(desc);
+}
+EXPORT_SYMBOL_GPL(dev_ims_set_desc);
+
#ifdef CONFIG_IRQ_REMAP
static struct msi_domain_ops dev_ims_domain_ops = {
.get_hwirq = msi_get_hwirq,
.msi_prepare = dev_ims_prepare,
+ .set_desc = dev_ims_set_desc,
};
static struct irq_chip dev_ims_ir_controller = {
diff --git a/drivers/base/ims-msi.c b/drivers/base/ims-msi.c
index 3e579c9..48f3d24 100644
--- a/drivers/base/ims-msi.c
+++ b/drivers/base/ims-msi.c
@@ -22,6 +22,15 @@ struct dev_ims_priv_data {
static DEFINE_IDA(dev_ims_devid_ida);
+irq_hw_number_t dev_ims_calc_hwirq(struct msi_desc *desc)
+{
+ u32 devid;
+
+ devid = desc->dev_ims.priv->devid;
+
+ return (devid << (32 - DEVIMS_ID_SHIFT)) | desc->dev_ims.ims_index;
+}
+
u32 __dev_ims_desc_mask_irq(struct msi_desc *desc, u32 flag)
{
u32 mask_bits = desc->dev_ims.masked;
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 4543bbf..fe4678e 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -237,6 +237,7 @@ void dev_ims_teardown_irqs(struct device *dev);
void dev_ims_restore_irqs(struct device *dev);
int dev_ims_alloc_irqs(struct device *dev, int nvec, struct dev_ims_ops *ops);
void dev_ims_free_irqs(struct device *dev);
+irq_hw_number_t dev_ims_calc_hwirq(struct msi_desc *desc);
/*
* The arch hooks to setup up msi irqs. Those functions are
--
2.7.4
next prev parent reply other threads:[~2019-09-13 1:14 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-13 1:32 [RFC V1 0/7] Add support for a new IMS interrupt mechanism Megha Dey
2019-09-13 1:32 ` [RFC V1 1/7] genirq/msi: Differentiate between various MSI based interrupts Megha Dey
2019-09-13 4:40 ` Greg KH
2019-09-13 14:40 ` Jason Gunthorpe
2019-09-26 21:50 ` Bjorn Helgaas
2019-09-13 1:32 ` [RFC V1 2/7] drivers/base: Introduce callbacks for IMS interrupt domain Megha Dey
2019-09-13 4:39 ` Greg KH
2019-09-13 14:50 ` Jason Gunthorpe
2019-09-13 1:32 ` [RFC V1 3/7] x86/ims: Add support for a new IMS irq domain Megha Dey
2019-09-13 14:52 ` Jason Gunthorpe
2019-09-13 22:07 ` Alex Williamson
2019-09-13 1:32 ` [RFC V1 4/7] irq_remapping: New interfaces to support IMS irqdomain Megha Dey
2019-09-13 1:32 ` [RFC V1 5/7] x86/ims: Introduce x86_ims_ops Megha Dey
2019-09-13 14:54 ` Jason Gunthorpe
2019-09-13 1:32 ` [RFC V1 6/7] ims-msi: Add APIs to allocate/free IMS interrupts Megha Dey
2019-09-26 21:44 ` Bjorn Helgaas
2019-09-13 1:32 ` Megha Dey [this message]
2019-09-26 21:47 ` [RFC V1 7/7] ims: Add the set_desc callback Bjorn Helgaas
2019-09-13 19:50 ` [RFC V1 0/7] Add support for a new IMS interrupt mechanism Jason Gunthorpe
2019-09-13 20:27 ` Raj, Ashok
2019-09-19 18:25 ` Jason Gunthorpe
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