From: Dave Jiang <dave.jiang@intel.com>
To: vkoul@kernel.org, megha.dey@linux.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
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 05/15] ims-msi: Add mask/unmask routines
Date: Tue, 21 Apr 2020 16:34:17 -0700 [thread overview]
Message-ID: <158751205785.36773.16321096654677399376.stgit@djiang5-desk3.ch.intel.com> (raw)
In-Reply-To: <158751095889.36773.6009825070990637468.stgit@djiang5-desk3.ch.intel.com>
From: Megha Dey <megha.dey@linux.intel.com>
Introduce the mask/unmask functions which would be used as callbacks
to the IRQ chip associated with the IMS domain.
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
---
drivers/base/ims-msi.c | 47 +++++++++++++++++++++++++++++++++++++++++++
drivers/base/platform-msi.c | 12 -----------
include/linux/msi.h | 14 +++++++++++++
3 files changed, 61 insertions(+), 12 deletions(-)
diff --git a/drivers/base/ims-msi.c b/drivers/base/ims-msi.c
index 738f6d153155..896a5a1b2252 100644
--- a/drivers/base/ims-msi.c
+++ b/drivers/base/ims-msi.c
@@ -7,11 +7,56 @@
* Author: Megha Dey <megha.dey@intel.com>
*/
+#include <linux/device.h>
#include <linux/dmar.h>
+#include <linux/export.h>
#include <linux/irq.h>
#include <linux/mdev.h>
+#include <linux/msi.h>
#include <linux/pci.h>
+static u32 __dev_ims_desc_mask_irq(struct msi_desc *desc, u32 flag)
+{
+ u32 mask_bits = desc->platform.masked;
+ const struct platform_msi_ops *ops;
+
+ ops = desc->platform.msi_priv_data->ops;
+ if (!ops)
+ return 0;
+
+ if (flag) {
+ if (ops->irq_mask)
+ mask_bits = ops->irq_mask(desc);
+ } else {
+ if (ops->irq_unmask)
+ mask_bits = ops->irq_unmask(desc);
+ }
+
+ return mask_bits;
+}
+
+/**
+ * dev_ims_mask_irq - Generic irq chip callback to mask IMS interrupts
+ * @data: pointer to irqdata associated to that interrupt
+ */
+static void dev_ims_mask_irq(struct irq_data *data)
+{
+ struct msi_desc *desc = irq_data_get_msi_desc(data);
+
+ desc->platform.masked = __dev_ims_desc_mask_irq(desc, 1);
+}
+
+/**
+ * dev_msi_unmask_irq - Generic irq chip callback to unmask IMS interrupts
+ * @data: pointer to irqdata associated to that interrupt
+ */
+void dev_ims_unmask_irq(struct irq_data *data)
+{
+ struct msi_desc *desc = irq_data_get_msi_desc(data);
+
+ desc->platform.masked = __dev_ims_desc_mask_irq(desc, 0);
+}
+
/*
* Determine if a dev is mdev or not. Return NULL if not mdev device.
* Return mdev's parent dev if success.
@@ -69,6 +114,8 @@ static struct irq_chip dev_ims_ir_controller = {
.irq_set_vcpu_affinity = irq_chip_set_vcpu_affinity_parent,
.flags = IRQCHIP_SKIP_SET_WAKE,
.irq_write_msi_msg = platform_msi_write_msg,
+ .irq_unmask = dev_ims_unmask_irq,
+ .irq_mask = dev_ims_mask_irq,
};
static struct msi_domain_info ims_ir_domain_info = {
diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c
index 59160e8cbfb1..6d8840db4a85 100644
--- a/drivers/base/platform-msi.c
+++ b/drivers/base/platform-msi.c
@@ -16,18 +16,6 @@
#define DEV_ID_SHIFT 21
#define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT))
-/*
- * Internal data structure containing a (made up, but unique) devid
- * and the callback to write the MSI message.
- */
-struct platform_msi_priv_data {
- struct device *dev;
- void *host_data;
- msi_alloc_info_t arg;
- const struct platform_msi_ops *ops;
- int devid;
-};
-
/* The devid allocator */
static DEFINE_IDA(platform_msi_devid_ida);
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 80386468a7bc..8b5f24bf3c47 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -33,10 +33,12 @@ typedef void (*irq_write_msi_msg_t)(struct msi_desc *desc,
* platform_msi_desc - Platform device specific msi descriptor data
* @msi_priv_data: Pointer to platform private data
* @msi_index: The index of the MSI descriptor for multi MSI
+ * @masked: mask bits
*/
struct platform_msi_desc {
struct platform_msi_priv_data *msi_priv_data;
u16 msi_index;
+ u32 masked;
};
/**
@@ -370,6 +372,18 @@ struct platform_msi_ops {
irq_write_msi_msg_t write_msg;
};
+/*
+ * Internal data structure containing a (made up, but unique) devid
+ * and the callback to write the MSI message.
+ */
+struct platform_msi_priv_data {
+ struct device *dev;
+ void *host_data;
+ msi_alloc_info_t arg;
+ const struct platform_msi_ops *ops;
+ int devid;
+};
+
int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
bool force);
next prev parent reply other threads:[~2020-04-21 23:34 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-21 23:33 [PATCH RFC 00/15] Add VFIO mediated device support and IMS support for the idxd driver Dave Jiang
2020-04-21 23:33 ` [PATCH RFC 01/15] drivers/base: Introduce platform_msi_ops Dave Jiang
2020-04-26 7:01 ` Greg KH
2020-04-27 21:38 ` Dave Jiang
2020-04-28 7:34 ` Greg KH
2020-04-21 23:33 ` [PATCH RFC 02/15] drivers/base: Introduce a new platform-msi list Dave Jiang
2020-04-25 21:13 ` Thomas Gleixner
2020-05-04 0:08 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 03/15] drivers/base: Allocate/free platform-msi interrupts by group Dave Jiang
2020-04-25 21:23 ` Thomas Gleixner
2020-05-04 0:08 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 04/15] drivers/base: Add support for a new IMS irq domain Dave Jiang
2020-04-23 20:11 ` Jason Gunthorpe
2020-05-01 22:30 ` Dey, Megha
2020-05-03 22:25 ` Jason Gunthorpe
2020-05-03 22:40 ` Dey, Megha
2020-05-03 22:46 ` Jason Gunthorpe
2020-05-04 0:25 ` Dey, Megha
2020-05-04 12:14 ` Jason Gunthorpe
2020-05-06 10:27 ` Tian, Kevin
2020-04-25 21:38 ` Thomas Gleixner
2020-05-04 0:11 ` Dey, Megha
2020-04-21 23:34 ` Dave Jiang [this message]
2020-04-25 21:49 ` [PATCH RFC 05/15] ims-msi: Add mask/unmask routines Thomas Gleixner
2020-05-04 0:16 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 06/15] ims-msi: Enable IMS interrupts Dave Jiang
2020-04-25 22:13 ` Thomas Gleixner
2020-05-04 0:17 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 07/15] Documentation: Interrupt Message store Dave Jiang
2020-04-23 20:04 ` Jason Gunthorpe
2020-05-01 22:32 ` Dey, Megha
2020-05-03 22:28 ` Jason Gunthorpe
2020-05-03 22:41 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 08/15] vfio/mdev: Add a member for iommu domain in mdev_device Dave Jiang
2020-04-21 23:34 ` [PATCH RFC 09/15] vfio/type1: Save domain when attach domain to mdev Dave Jiang
2020-04-21 23:34 ` [PATCH RFC 10/15] dmaengine: idxd: add config support for readonly devices Dave Jiang
2020-04-21 23:34 ` [PATCH RFC 11/15] dmaengine: idxd: add IMS support in base driver Dave Jiang
2020-04-21 23:35 ` [PATCH RFC 12/15] dmaengine: idxd: add device support functions in prep for mdev Dave Jiang
2020-04-21 23:35 ` [PATCH RFC 13/15] dmaengine: idxd: add support for VFIO mediated device Dave Jiang
2020-04-21 23:35 ` [PATCH RFC 14/15] dmaengine: idxd: add error notification from host driver to " Dave Jiang
2020-04-21 23:35 ` [PATCH RFC 15/15] dmaengine: idxd: add ABI documentation for mediated device support Dave Jiang
2020-04-21 23:54 ` [PATCH RFC 00/15] Add VFIO mediated device support and IMS support for the idxd driver Jason Gunthorpe
2020-04-22 0:53 ` Tian, Kevin
2020-04-22 11:50 ` Jason Gunthorpe
2020-04-22 21:14 ` Raj, Ashok
2020-04-23 19:12 ` Jason Gunthorpe
2020-04-24 3:27 ` Tian, Kevin
2020-04-24 12:44 ` Jason Gunthorpe
2020-04-24 16:25 ` Tian, Kevin
2020-04-24 18:12 ` Jason Gunthorpe
2020-04-26 5:18 ` Tian, Kevin
2020-04-26 19:13 ` Jason Gunthorpe
2020-04-27 3:43 ` Alex Williamson
2020-04-27 11:58 ` Jason Gunthorpe
2020-04-27 13:19 ` Alex Williamson
2020-04-27 13:22 ` Jason Gunthorpe
2020-04-27 14:18 ` Alex Williamson
2020-04-27 14:25 ` Jason Gunthorpe
2020-04-27 15:41 ` Alex Williamson
2020-04-27 16:16 ` Jason Gunthorpe
2020-04-27 16:25 ` Dave Jiang
2020-04-27 21:56 ` Jason Gunthorpe
2020-04-29 9:42 ` Tian, Kevin
2020-05-08 20:47 ` Raj, Ashok
2020-05-08 23:16 ` Jason Gunthorpe
2020-05-08 23:52 ` Dave Jiang
2020-05-09 0:09 ` Raj, Ashok
2020-05-09 12:21 ` Jason Gunthorpe
2020-05-13 2:29 ` Jason Wang
2020-05-13 8:30 ` Tian, Kevin
2020-05-13 12:40 ` Jason Gunthorpe
2020-04-27 12:13 ` Tian, Kevin
2020-04-27 12:55 ` Jason Gunthorpe
2020-04-22 21:24 ` Dan Williams
2020-04-23 19:17 ` Dan Williams
2020-04-23 19:49 ` Jason Gunthorpe
2020-05-01 22:31 ` Dey, Megha
2020-05-03 22:21 ` Jason Gunthorpe
2020-05-03 22:32 ` Dey, Megha
2020-04-23 19:18 ` Jason Gunthorpe
2020-05-01 22:31 ` Dey, Megha
2020-05-03 22:22 ` Jason Gunthorpe
2020-05-03 22:31 ` Dey, Megha
2020-05-03 22:36 ` Jason Gunthorpe
2020-05-04 0:20 ` Dey, Megha
2020-04-22 23:04 ` Dey, Megha
2020-04-23 19:44 ` Jason Gunthorpe
2020-05-01 22:32 ` Dey, Megha
2020-04-24 6:31 ` Jason Wang
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