From ee930fffee469d076998274a2ca55e13dc1efb67 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:54 +0000
Subject: [PATCH] enable tun/tap/iptables
---
kernel/drivers/misc/ocxl/afu_irq.c | 113 ++++++++++++++++++++++++++++++--------------------------
1 files changed, 61 insertions(+), 52 deletions(-)
diff --git a/kernel/drivers/misc/ocxl/afu_irq.c b/kernel/drivers/misc/ocxl/afu_irq.c
index e70cfa2..ecdcfae 100644
--- a/kernel/drivers/misc/ocxl/afu_irq.c
+++ b/kernel/drivers/misc/ocxl/afu_irq.c
@@ -1,8 +1,8 @@
// SPDX-License-Identifier: GPL-2.0+
// Copyright 2017 IBM Corp.
#include <linux/interrupt.h>
-#include <linux/eventfd.h>
#include <asm/pnv-ocxl.h>
+#include <asm/xive.h>
#include "ocxl_internal.h"
#include "trace.h"
@@ -11,28 +11,59 @@
int hw_irq;
unsigned int virq;
char *name;
- u64 trigger_page;
- struct eventfd_ctx *ev_ctx;
+ irqreturn_t (*handler)(void *private);
+ void (*free_private)(void *private);
+ void *private;
};
-static int irq_offset_to_id(struct ocxl_context *ctx, u64 offset)
+int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset)
{
return (offset - ctx->afu->irq_base_offset) >> PAGE_SHIFT;
}
-static u64 irq_id_to_offset(struct ocxl_context *ctx, int id)
+u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id)
{
- return ctx->afu->irq_base_offset + (id << PAGE_SHIFT);
+ return ctx->afu->irq_base_offset + (irq_id << PAGE_SHIFT);
}
+
+int ocxl_irq_set_handler(struct ocxl_context *ctx, int irq_id,
+ irqreturn_t (*handler)(void *private),
+ void (*free_private)(void *private),
+ void *private)
+{
+ struct afu_irq *irq;
+ int rc;
+
+ mutex_lock(&ctx->irq_lock);
+ irq = idr_find(&ctx->irq_idr, irq_id);
+ if (!irq) {
+ rc = -EINVAL;
+ goto unlock;
+ }
+
+ irq->handler = handler;
+ irq->private = private;
+ irq->free_private = free_private;
+
+ rc = 0;
+ // Fall through to unlock
+
+unlock:
+ mutex_unlock(&ctx->irq_lock);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(ocxl_irq_set_handler);
static irqreturn_t afu_irq_handler(int virq, void *data)
{
struct afu_irq *irq = (struct afu_irq *) data;
trace_ocxl_afu_irq_receive(virq);
- if (irq->ev_ctx)
- eventfd_signal(irq->ev_ctx, 1);
- return IRQ_HANDLED;
+
+ if (irq->handler)
+ return irq->handler(irq->private);
+
+ return IRQ_HANDLED; // Just drop it on the ground
}
static int setup_afu_irq(struct ocxl_context *ctx, struct afu_irq *irq)
@@ -70,7 +101,7 @@
kfree(irq->name);
}
-int ocxl_afu_irq_alloc(struct ocxl_context *ctx, u64 *irq_offset)
+int ocxl_afu_irq_alloc(struct ocxl_context *ctx, int *irq_id)
{
struct afu_irq *irq;
int rc;
@@ -93,8 +124,7 @@
goto err_unlock;
}
- rc = ocxl_link_irq_alloc(ctx->afu->fn->link, &irq->hw_irq,
- &irq->trigger_page);
+ rc = ocxl_link_irq_alloc(ctx->afu->fn->link, &irq->hw_irq);
if (rc)
goto err_idr;
@@ -102,11 +132,11 @@
if (rc)
goto err_alloc;
- *irq_offset = irq_id_to_offset(ctx, irq->id);
-
- trace_ocxl_afu_irq_alloc(ctx->pasid, irq->id, irq->virq, irq->hw_irq,
- *irq_offset);
+ trace_ocxl_afu_irq_alloc(ctx->pasid, irq->id, irq->virq, irq->hw_irq);
mutex_unlock(&ctx->irq_lock);
+
+ *irq_id = irq->id;
+
return 0;
err_alloc:
@@ -118,29 +148,29 @@
kfree(irq);
return rc;
}
+EXPORT_SYMBOL_GPL(ocxl_afu_irq_alloc);
static void afu_irq_free(struct afu_irq *irq, struct ocxl_context *ctx)
{
trace_ocxl_afu_irq_free(ctx->pasid, irq->id);
if (ctx->mapping)
unmap_mapping_range(ctx->mapping,
- irq_id_to_offset(ctx, irq->id),
+ ocxl_irq_id_to_offset(ctx, irq->id),
1 << PAGE_SHIFT, 1);
release_afu_irq(irq);
- if (irq->ev_ctx)
- eventfd_ctx_put(irq->ev_ctx);
+ if (irq->free_private)
+ irq->free_private(irq->private);
ocxl_link_free_irq(ctx->afu->fn->link, irq->hw_irq);
kfree(irq);
}
-int ocxl_afu_irq_free(struct ocxl_context *ctx, u64 irq_offset)
+int ocxl_afu_irq_free(struct ocxl_context *ctx, int irq_id)
{
struct afu_irq *irq;
- int id = irq_offset_to_id(ctx, irq_offset);
mutex_lock(&ctx->irq_lock);
- irq = idr_find(&ctx->irq_idr, id);
+ irq = idr_find(&ctx->irq_idr, irq_id);
if (!irq) {
mutex_unlock(&ctx->irq_lock);
return -EINVAL;
@@ -150,6 +180,7 @@
mutex_unlock(&ctx->irq_lock);
return 0;
}
+EXPORT_SYMBOL_GPL(ocxl_afu_irq_free);
void ocxl_afu_irq_free_all(struct ocxl_context *ctx)
{
@@ -162,41 +193,19 @@
mutex_unlock(&ctx->irq_lock);
}
-int ocxl_afu_irq_set_fd(struct ocxl_context *ctx, u64 irq_offset, int eventfd)
+u64 ocxl_afu_irq_get_addr(struct ocxl_context *ctx, int irq_id)
{
+ struct xive_irq_data *xd;
struct afu_irq *irq;
- struct eventfd_ctx *ev_ctx;
- int rc = 0, id = irq_offset_to_id(ctx, irq_offset);
-
- mutex_lock(&ctx->irq_lock);
- irq = idr_find(&ctx->irq_idr, id);
- if (!irq) {
- rc = -EINVAL;
- goto unlock;
- }
-
- ev_ctx = eventfd_ctx_fdget(eventfd);
- if (IS_ERR(ev_ctx)) {
- rc = -EINVAL;
- goto unlock;
- }
-
- irq->ev_ctx = ev_ctx;
-unlock:
- mutex_unlock(&ctx->irq_lock);
- return rc;
-}
-
-u64 ocxl_afu_irq_get_addr(struct ocxl_context *ctx, u64 irq_offset)
-{
- struct afu_irq *irq;
- int id = irq_offset_to_id(ctx, irq_offset);
u64 addr = 0;
mutex_lock(&ctx->irq_lock);
- irq = idr_find(&ctx->irq_idr, id);
- if (irq)
- addr = irq->trigger_page;
+ irq = idr_find(&ctx->irq_idr, irq_id);
+ if (irq) {
+ xd = irq_get_handler_data(irq->virq);
+ addr = xd ? xd->trig_page : 0;
+ }
mutex_unlock(&ctx->irq_lock);
return addr;
}
+EXPORT_SYMBOL_GPL(ocxl_afu_irq_get_addr);
--
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