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Message-Id: <982ab998895e918a8920e5d5d927bb653f2cd7cf.1698422237.git.reinette.chatre@intel.com>
Date: Fri, 27 Oct 2023 10:00:44 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: jgg@...dia.com, yishaih@...dia.com,
shameerali.kolothum.thodi@...wei.com, kevin.tian@...el.com,
alex.williamson@...hat.com
Cc: kvm@...r.kernel.org, dave.jiang@...el.com, jing2.liu@...el.com,
ashok.raj@...el.com, fenghua.yu@...el.com,
tom.zanussi@...ux.intel.com, reinette.chatre@...el.com,
linux-kernel@...r.kernel.org, patches@...ts.linux.dev
Subject: [RFC PATCH V3 12/26] vfio/pci: Provide interrupt context to generic ops
The functions operating on the per-interrupt context were originally
created to support management of PCI device interrupts where the
interrupt context was maintained within the virtual PCI device's
struct vfio_pci_core_device. Now that the per-interrupt context
has been moved to a more generic struct vfio_pci_intr_ctx these utilities
can be changed to expect the generic structure instead. This enables
these utilities to be used in other interrupt management backends.
Signed-off-by: Reinette Chatre <reinette.chatre@...el.com>
---
No changes since RFC V2.
drivers/vfio/pci/vfio_pci_intrs.c | 41 ++++++++++++++++---------------
1 file changed, 21 insertions(+), 20 deletions(-)
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
index 9aff5c38f198..cdb6f875271f 100644
--- a/drivers/vfio/pci/vfio_pci_intrs.c
+++ b/drivers/vfio/pci/vfio_pci_intrs.c
@@ -49,21 +49,21 @@ static bool is_irq_none(struct vfio_pci_intr_ctx *intr_ctx)
}
static
-struct vfio_pci_irq_ctx *vfio_irq_ctx_get(struct vfio_pci_core_device *vdev,
+struct vfio_pci_irq_ctx *vfio_irq_ctx_get(struct vfio_pci_intr_ctx *intr_ctx,
unsigned long index)
{
- return xa_load(&vdev->intr_ctx.ctx, index);
+ return xa_load(&intr_ctx->ctx, index);
}
-static void vfio_irq_ctx_free(struct vfio_pci_core_device *vdev,
+static void vfio_irq_ctx_free(struct vfio_pci_intr_ctx *intr_ctx,
struct vfio_pci_irq_ctx *ctx, unsigned long index)
{
- xa_erase(&vdev->intr_ctx.ctx, index);
+ xa_erase(&intr_ctx->ctx, index);
kfree(ctx);
}
static struct vfio_pci_irq_ctx *
-vfio_irq_ctx_alloc(struct vfio_pci_core_device *vdev, unsigned long index)
+vfio_irq_ctx_alloc(struct vfio_pci_intr_ctx *intr_ctx, unsigned long index)
{
struct vfio_pci_irq_ctx *ctx;
int ret;
@@ -72,7 +72,7 @@ vfio_irq_ctx_alloc(struct vfio_pci_core_device *vdev, unsigned long index)
if (!ctx)
return NULL;
- ret = xa_insert(&vdev->intr_ctx.ctx, index, ctx, GFP_KERNEL_ACCOUNT);
+ ret = xa_insert(&intr_ctx->ctx, index, ctx, GFP_KERNEL_ACCOUNT);
if (ret) {
kfree(ctx);
return NULL;
@@ -91,7 +91,7 @@ static void vfio_send_intx_eventfd(void *opaque, void *unused)
if (likely(is_intx(vdev) && !vdev->virq_disabled)) {
struct vfio_pci_irq_ctx *ctx;
- ctx = vfio_irq_ctx_get(vdev, 0);
+ ctx = vfio_irq_ctx_get(&vdev->intr_ctx, 0);
if (WARN_ON_ONCE(!ctx))
return;
eventfd_signal(ctx->trigger, 1);
@@ -120,7 +120,7 @@ bool vfio_pci_intx_mask(struct vfio_pci_core_device *vdev)
goto out_unlock;
}
- ctx = vfio_irq_ctx_get(vdev, 0);
+ ctx = vfio_irq_ctx_get(&vdev->intr_ctx, 0);
if (WARN_ON_ONCE(!ctx))
goto out_unlock;
@@ -169,7 +169,7 @@ static int vfio_pci_intx_unmask_handler(void *opaque, void *unused)
goto out_unlock;
}
- ctx = vfio_irq_ctx_get(vdev, 0);
+ ctx = vfio_irq_ctx_get(&vdev->intr_ctx, 0);
if (WARN_ON_ONCE(!ctx))
goto out_unlock;
@@ -207,7 +207,7 @@ static irqreturn_t vfio_intx_handler(int irq, void *dev_id)
unsigned long flags;
int ret = IRQ_NONE;
- ctx = vfio_irq_ctx_get(vdev, 0);
+ ctx = vfio_irq_ctx_get(&vdev->intr_ctx, 0);
if (WARN_ON_ONCE(!ctx))
return ret;
@@ -241,7 +241,7 @@ static int vfio_intx_enable(struct vfio_pci_core_device *vdev)
if (!vdev->pdev->irq)
return -ENODEV;
- ctx = vfio_irq_ctx_alloc(vdev, 0);
+ ctx = vfio_irq_ctx_alloc(&vdev->intr_ctx, 0);
if (!ctx)
return -ENOMEM;
@@ -269,7 +269,7 @@ static int vfio_intx_set_signal(struct vfio_pci_core_device *vdev, int fd)
unsigned long flags;
int ret;
- ctx = vfio_irq_ctx_get(vdev, 0);
+ ctx = vfio_irq_ctx_get(&vdev->intr_ctx, 0);
if (WARN_ON_ONCE(!ctx))
return -EINVAL;
@@ -324,7 +324,7 @@ static void vfio_intx_disable(struct vfio_pci_core_device *vdev)
{
struct vfio_pci_irq_ctx *ctx;
- ctx = vfio_irq_ctx_get(vdev, 0);
+ ctx = vfio_irq_ctx_get(&vdev->intr_ctx, 0);
WARN_ON_ONCE(!ctx);
if (ctx) {
vfio_virqfd_disable(&ctx->unmask);
@@ -332,7 +332,7 @@ static void vfio_intx_disable(struct vfio_pci_core_device *vdev)
}
vfio_intx_set_signal(vdev, -1);
vdev->intr_ctx.irq_type = VFIO_PCI_NUM_IRQS;
- vfio_irq_ctx_free(vdev, ctx, 0);
+ vfio_irq_ctx_free(&vdev->intr_ctx, ctx, 0);
}
/*
@@ -421,7 +421,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_core_device *vdev,
int irq = -EINVAL, ret;
u16 cmd;
- ctx = vfio_irq_ctx_get(vdev, vector);
+ ctx = vfio_irq_ctx_get(&vdev->intr_ctx, vector);
if (ctx) {
irq_bypass_unregister_producer(&ctx->producer);
@@ -432,7 +432,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_core_device *vdev,
/* Interrupt stays allocated, will be freed at MSI-X disable. */
kfree(ctx->name);
eventfd_ctx_put(ctx->trigger);
- vfio_irq_ctx_free(vdev, ctx, vector);
+ vfio_irq_ctx_free(&vdev->intr_ctx, ctx, vector);
}
if (fd < 0)
@@ -445,7 +445,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_core_device *vdev,
return irq;
}
- ctx = vfio_irq_ctx_alloc(vdev, vector);
+ ctx = vfio_irq_ctx_alloc(&vdev->intr_ctx, vector);
if (!ctx)
return -ENOMEM;
@@ -499,7 +499,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_core_device *vdev,
out_free_name:
kfree(ctx->name);
out_free_ctx:
- vfio_irq_ctx_free(vdev, ctx, vector);
+ vfio_irq_ctx_free(&vdev->intr_ctx, ctx, vector);
return ret;
}
@@ -570,7 +570,8 @@ static int vfio_pci_set_intx_unmask(struct vfio_pci_intr_ctx *intr_ctx,
if (unmask)
vfio_pci_intx_unmask(vdev);
} else if (flags & VFIO_IRQ_SET_DATA_EVENTFD) {
- struct vfio_pci_irq_ctx *ctx = vfio_irq_ctx_get(vdev, 0);
+ struct vfio_pci_irq_ctx *ctx = vfio_irq_ctx_get(&vdev->intr_ctx,
+ 0);
int32_t fd = *(int32_t *)data;
if (WARN_ON_ONCE(!ctx))
@@ -696,7 +697,7 @@ static int vfio_pci_set_msi_trigger(struct vfio_pci_intr_ctx *intr_ctx,
return -EINVAL;
for (i = start; i < start + count; i++) {
- ctx = vfio_irq_ctx_get(vdev, i);
+ ctx = vfio_irq_ctx_get(&vdev->intr_ctx, i);
if (!ctx)
continue;
if (flags & VFIO_IRQ_SET_DATA_NONE) {
--
2.34.1
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