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Message-ID: <20221124230314.279112474@linutronix.de>
Date: Fri, 25 Nov 2022 00:24:32 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, Joerg Roedel <joro@...tes.org>,
Will Deacon <will@...nel.org>, linux-pci@...r.kernel.org,
Bjorn Helgaas <bhelgaas@...gle.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Marc Zyngier <maz@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jason Gunthorpe <jgg@...lanox.com>,
Dave Jiang <dave.jiang@...el.com>,
Alex Williamson <alex.williamson@...hat.com>,
Kevin Tian <kevin.tian@...el.com>,
Dan Williams <dan.j.williams@...el.com>,
Logan Gunthorpe <logang@...tatee.com>,
Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>,
Allen Hubbe <allenbh@...il.com>
Subject: [patch V3 15/22] genirq/msi: Make msi_add_simple_msi_descs() device
domain aware
Allocating simple interrupt descriptors in the core code has to be multi
device irqdomain aware for the upcoming PCI/IMS support.
Change the interfaces to take a domain id into account. Use the internal
control struct for transport of arguments.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
V3: Adopt to the domain/xarray storage change
---
kernel/irq/msi.c | 98 +++++++++++++++++++++++++++++++------------------------
1 file changed, 57 insertions(+), 41 deletions(-)
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -116,39 +116,6 @@ int msi_domain_insert_msi_desc(struct de
return msi_insert_desc(dev->msi.data, desc, domid, init_desc->msi_index);
}
-/**
- * msi_add_simple_msi_descs - Allocate and initialize MSI descriptors
- * @dev: Pointer to the device for which the descriptors are allocated
- * @index: Index for the first MSI descriptor
- * @ndesc: Number of descriptors to allocate
- *
- * Return: 0 on success or an appropriate failure code.
- */
-static int msi_add_simple_msi_descs(struct device *dev, unsigned int index, unsigned int ndesc)
-{
- unsigned int idx, last = index + ndesc - 1;
- struct msi_desc *desc;
- int ret;
-
- lockdep_assert_held(&dev->msi.data->mutex);
-
- for (idx = index; idx <= last; idx++) {
- desc = msi_alloc_desc(dev, 1, NULL);
- if (!desc)
- goto fail_mem;
- ret = msi_insert_desc(dev->msi.data, desc, MSI_DEFAULT_DOMAIN, idx);
- if (ret)
- goto fail;
- }
- return 0;
-
-fail_mem:
- ret = -ENOMEM;
-fail:
- msi_free_msi_descs_range(dev, index, last);
- return ret;
-}
-
static bool msi_desc_match(struct msi_desc *desc, enum msi_desc_filter filter)
{
switch (filter) {
@@ -166,6 +133,7 @@ static bool msi_desc_match(struct msi_de
static bool msi_ctrl_valid(struct device *dev, struct msi_ctrl *ctrl)
{
if (WARN_ON_ONCE(ctrl->domid >= MSI_MAX_DEVICE_IRQDOMAINS ||
+ !dev->msi.data->__domains[ctrl->domid].domain ||
ctrl->first > ctrl->last ||
ctrl->first > MSI_MAX_INDEX ||
ctrl->last > MSI_MAX_INDEX))
@@ -214,6 +182,41 @@ void msi_domain_free_msi_descs_range(str
msi_domain_free_descs(dev, &ctrl);
}
+/**
+ * msi_domain_add_simple_msi_descs - Allocate and initialize MSI descriptors
+ * @dev: Pointer to the device for which the descriptors are allocated
+ * @ctrl: Allocation control struct
+ *
+ * Return: 0 on success or an appropriate failure code.
+ */
+static int msi_domain_add_simple_msi_descs(struct device *dev, struct msi_ctrl *ctrl)
+{
+ struct msi_desc *desc;
+ unsigned int idx;
+ int ret;
+
+ lockdep_assert_held(&dev->msi.data->mutex);
+
+ if (!msi_ctrl_valid(dev, ctrl))
+ return -EINVAL;
+
+ for (idx = ctrl->first; idx <= ctrl->last; idx++) {
+ desc = msi_alloc_desc(dev, 1, NULL);
+ if (!desc)
+ goto fail_mem;
+ ret = msi_insert_desc(dev->msi.data, desc, ctrl->domid, idx);
+ if (ret)
+ goto fail;
+ }
+ return 0;
+
+fail_mem:
+ ret = -ENOMEM;
+fail:
+ msi_domain_free_descs(dev, ctrl);
+ return ret;
+}
+
void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
{
*msg = entry->msg;
@@ -787,16 +790,24 @@ int msi_domain_populate_irqs(struct irq_
{
struct msi_domain_info *info = domain->host_data;
struct msi_domain_ops *ops = info->ops;
+ struct msi_ctrl ctrl = {
+ .domid = MSI_DEFAULT_DOMAIN,
+ .first = virq_base,
+ .last = virq_base + nvec - 1,
+ };
struct msi_desc *desc;
struct xarray *xa;
int ret, virq;
+ if (!msi_ctrl_valid(dev, &ctrl))
+ return -EINVAL;
+
msi_lock_descs(dev);
- ret = msi_add_simple_msi_descs(dev, virq_base, nvec);
+ ret = msi_domain_add_simple_msi_descs(dev, &ctrl);
if (ret)
goto unlock;
- xa = &dev->msi.data->__domains[MSI_DEFAULT_DOMAIN].store;
+ xa = &dev->msi.data->__domains[ctrl.domid].store;
for (virq = virq_base; virq < virq_base + nvec; virq++) {
desc = xa_load(xa, virq);
@@ -815,7 +826,7 @@ int msi_domain_populate_irqs(struct irq_
fail:
for (--virq; virq >= virq_base; virq--)
irq_domain_free_irqs_common(domain, virq, 1);
- msi_free_msi_descs_range(dev, virq_base, virq_base + nvec - 1);
+ msi_domain_free_descs(dev, &ctrl);
unlock:
msi_unlock_descs(dev);
return ret;
@@ -989,14 +1000,19 @@ static int __msi_domain_alloc_irqs(struc
return 0;
}
-static int msi_domain_add_simple_msi_descs(struct msi_domain_info *info,
- struct device *dev,
- unsigned int num_descs)
+static int msi_domain_alloc_simple_msi_descs(struct device *dev,
+ struct msi_domain_info *info,
+ unsigned int num_descs)
{
+ struct msi_ctrl ctrl = {
+ .domid = MSI_DEFAULT_DOMAIN,
+ .last = num_descs - 1,
+ };
+
if (!(info->flags & MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS))
return 0;
- return msi_add_simple_msi_descs(dev, 0, num_descs);
+ return msi_domain_add_simple_msi_descs(dev, &ctrl);
}
/**
@@ -1027,7 +1043,7 @@ int msi_domain_alloc_irqs_descs_locked(s
}
/* Frees allocated descriptors in case of failure. */
- ret = msi_domain_add_simple_msi_descs(info, dev, nvec);
+ ret = msi_domain_alloc_simple_msi_descs(dev, info, nvec);
if (ret)
goto free;
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