enable tun/tap/iptables

hc

2024-05-10 ee930fffee469d076998274a2ca55e13dc1efb67

 kernel/drivers/misc/ocxl/context.c
..
..
@@ -4,15 +4,15 @@
4
4
 #include "trace.h"
5
5
 #include "ocxl_internal.h"
6
6
 
7
-struct ocxl_context *ocxl_context_alloc(void)
8
-{
9
-	return kzalloc(sizeof(struct ocxl_context), GFP_KERNEL);
10
-}
11
-
12
-int ocxl_context_init(struct ocxl_context *ctx, struct ocxl_afu *afu,
7
+int ocxl_context_alloc(struct ocxl_context **context, struct ocxl_afu *afu,
13
8
 		struct address_space *mapping)
14
9
 {
15
10
 	int pasid;
11
+	struct ocxl_context *ctx;
12
+
13
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
14
+	if (!ctx)
15
+		return -ENOMEM;
16
16
 
17
17
 	ctx->afu = afu;
18
18
 	mutex_lock(&afu->contexts_lock);
..
..
@@ -20,6 +20,7 @@
20
20
 			afu->pasid_base + afu->pasid_max, GFP_KERNEL);
21
21
 	if (pasid < 0) {
22
22
 		mutex_unlock(&afu->contexts_lock);
23
+		kfree(ctx);
23
24
 		return pasid;
24
25
 	}
25
26
 	afu->pasid_count++;
..
..
@@ -41,8 +42,10 @@
41
42
 	 * duration of the life of the context
42
43
 	 */
43
44
 	ocxl_afu_get(afu);
45
+	*context = ctx;
44
46
 	return 0;
45
47
 }
48
+EXPORT_SYMBOL_GPL(ocxl_context_alloc);
46
49
 
47
50
 /*
48
51
  * Callback for when a translation fault triggers an error
..
..
@@ -63,9 +66,10 @@
63
66
 	wake_up_all(&ctx->events_wq);
64
67
 }
65
68
 
66
-int ocxl_context_attach(struct ocxl_context *ctx, u64 amr)
69
+int ocxl_context_attach(struct ocxl_context *ctx, u64 amr, struct mm_struct *mm)
67
70
 {
68
71
 	int rc;
72
+	unsigned long pidr = 0;
69
73
 
70
74
 	// Locks both status & tidr
71
75
 	mutex_lock(&ctx->status_mutex);
..
..
@@ -74,9 +78,11 @@
74
78
 		goto out;
75
79
 	}
76
80
 
77
-	rc = ocxl_link_add_pe(ctx->afu->fn->link, ctx->pasid,
78
-			current->mm->context.id, ctx->tidr, amr, current->mm,
79
-			xsl_fault_error, ctx);
81
+	if (mm)
82
+		pidr = mm->context.id;
83
+
84
+	rc = ocxl_link_add_pe(ctx->afu->fn->link, ctx->pasid, pidr, ctx->tidr,
85
+			      amr, mm, xsl_fault_error, ctx);
80
86
 	if (rc)
81
87
 		goto out;
82
88
 
..
..
@@ -85,13 +91,15 @@
85
91
 	mutex_unlock(&ctx->status_mutex);
86
92
 	return rc;
87
93
 }
94
+EXPORT_SYMBOL_GPL(ocxl_context_attach);
88
95
 
89
96
 static vm_fault_t map_afu_irq(struct vm_area_struct *vma, unsigned long address,
90
97
 		u64 offset, struct ocxl_context *ctx)
91
98
 {
92
99
 	u64 trigger_addr;
100
+	int irq_id = ocxl_irq_offset_to_id(ctx, offset);
93
101
 
94
-	trigger_addr = ocxl_afu_irq_get_addr(ctx, offset);
102
+	trigger_addr = ocxl_afu_irq_get_addr(ctx, irq_id);
95
103
 	if (!trigger_addr)
96
104
 		return VM_FAULT_SIGBUS;
97
105
 
..
..
@@ -151,12 +159,14 @@
151
159
 static int check_mmap_afu_irq(struct ocxl_context *ctx,
152
160
 			struct vm_area_struct *vma)
153
161
 {
162
+	int irq_id = ocxl_irq_offset_to_id(ctx, vma->vm_pgoff << PAGE_SHIFT);
163
+
154
164
 	/* only one page */
155
165
 	if (vma_pages(vma) != 1)
156
166
 		return -EINVAL;
157
167
 
158
168
 	/* check offset validty */
159
-	if (!ocxl_afu_irq_get_addr(ctx, vma->vm_pgoff << PAGE_SHIFT))
169
+	if (!ocxl_afu_irq_get_addr(ctx, irq_id))
160
170
 		return -EINVAL;
161
171
 
162
172
 	/*
..
..
@@ -238,11 +248,12 @@
238
248
 	}
239
249
 	rc = ocxl_link_remove_pe(ctx->afu->fn->link, ctx->pasid);
240
250
 	if (rc) {
241
-		dev_warn(&ctx->afu->dev,
251
+		dev_warn(&dev->dev,
242
252
 			"Couldn't remove PE entry cleanly: %d\n", rc);
243
253
 	}
244
254
 	return 0;
245
255
 }
256
+EXPORT_SYMBOL_GPL(ocxl_context_detach);
246
257
 
247
258
 void ocxl_context_detach_all(struct ocxl_afu *afu)
248
259
 {
..
..
@@ -276,7 +287,8 @@
276
287
 
277
288
 	ocxl_afu_irq_free_all(ctx);
278
289
 	idr_destroy(&ctx->irq_idr);
279
-	/* reference to the AFU taken in ocxl_context_init */
290
+	/* reference to the AFU taken in ocxl_context_alloc() */
280
291
 	ocxl_afu_put(ctx->afu);
281
292
 	kfree(ctx);
282
293
 }
294
+EXPORT_SYMBOL_GPL(ocxl_context_free);