disable pwm7

hc

2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a

 kernel/drivers/misc/ocxl/afu_irq.c
..
..
@@ -1,8 +1,8 @@
1
1
 // SPDX-License-Identifier: GPL-2.0+
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2
 // Copyright 2017 IBM Corp.
3
3
 #include <linux/interrupt.h>
4
-#include <linux/eventfd.h>
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4
 #include <asm/pnv-ocxl.h>
5
+#include <asm/xive.h>
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6
 #include "ocxl_internal.h"
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7
 #include "trace.h"
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8
 
..
..
@@ -11,28 +11,59 @@
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11
 	int hw_irq;
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12
 	unsigned int virq;
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13
 	char *name;
14
-	u64 trigger_page;
15
-	struct eventfd_ctx *ev_ctx;
14
+	irqreturn_t (*handler)(void *private);
15
+	void (*free_private)(void *private);
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+	void *private;
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 };
17
18
 
18
-static int irq_offset_to_id(struct ocxl_context *ctx, u64 offset)
19
+int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset)
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20
 {
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21
 	return (offset - ctx->afu->irq_base_offset) >> PAGE_SHIFT;
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22
 }
22
23
 
23
-static u64 irq_id_to_offset(struct ocxl_context *ctx, int id)
24
+u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id)
24
25
 {
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-	return ctx->afu->irq_base_offset + (id << PAGE_SHIFT);
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+	return ctx->afu->irq_base_offset + (irq_id << PAGE_SHIFT);
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27
 }
28
+
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+int ocxl_irq_set_handler(struct ocxl_context *ctx, int irq_id,
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+		irqreturn_t (*handler)(void *private),
31
+		void (*free_private)(void *private),
32
+		void *private)
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+{
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+	struct afu_irq *irq;
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+	int rc;
36
+
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+	mutex_lock(&ctx->irq_lock);
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+	irq = idr_find(&ctx->irq_idr, irq_id);
39
+	if (!irq) {
40
+		rc = -EINVAL;
41
+		goto unlock;
42
+	}
43
+
44
+	irq->handler = handler;
45
+	irq->private = private;
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+	irq->free_private = free_private;
47
+
48
+	rc = 0;
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+	// Fall through to unlock
50
+
51
+unlock:
52
+	mutex_unlock(&ctx->irq_lock);
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+	return rc;
54
+}
55
+EXPORT_SYMBOL_GPL(ocxl_irq_set_handler);
27
56
 
28
57
 static irqreturn_t afu_irq_handler(int virq, void *data)
29
58
 {
30
59
 	struct afu_irq *irq = (struct afu_irq *) data;
31
60
 
32
61
 	trace_ocxl_afu_irq_receive(virq);
33
-	if (irq->ev_ctx)
34
-		eventfd_signal(irq->ev_ctx, 1);
35
-	return IRQ_HANDLED;
62
+
63
+	if (irq->handler)
64
+		return irq->handler(irq->private);
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+
66
+	return IRQ_HANDLED; // Just drop it on the ground
36
67
 }
37
68
 
38
69
 static int setup_afu_irq(struct ocxl_context *ctx, struct afu_irq *irq)
..
..
@@ -70,7 +101,7 @@
70
101
 	kfree(irq->name);
71
102
 }
72
103
 
73
-int ocxl_afu_irq_alloc(struct ocxl_context *ctx, u64 *irq_offset)
104
+int ocxl_afu_irq_alloc(struct ocxl_context *ctx, int *irq_id)
74
105
 {
75
106
 	struct afu_irq *irq;
76
107
 	int rc;
..
..
@@ -93,8 +124,7 @@
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124
 		goto err_unlock;
94
125
 	}
95
126
 
96
-	rc = ocxl_link_irq_alloc(ctx->afu->fn->link, &irq->hw_irq,
97
-				&irq->trigger_page);
127
+	rc = ocxl_link_irq_alloc(ctx->afu->fn->link, &irq->hw_irq);
98
128
 	if (rc)
99
129
 		goto err_idr;
100
130
 
..
..
@@ -102,11 +132,11 @@
102
132
 	if (rc)
103
133
 		goto err_alloc;
104
134
 
105
-	*irq_offset = irq_id_to_offset(ctx, irq->id);
106
-
107
-	trace_ocxl_afu_irq_alloc(ctx->pasid, irq->id, irq->virq, irq->hw_irq,
108
-				*irq_offset);
135
+	trace_ocxl_afu_irq_alloc(ctx->pasid, irq->id, irq->virq, irq->hw_irq);
109
136
 	mutex_unlock(&ctx->irq_lock);
137
+
138
+	*irq_id = irq->id;
139
+
110
140
 	return 0;
111
141
 
112
142
 err_alloc:
..
..
@@ -118,29 +148,29 @@
118
148
 	kfree(irq);
119
149
 	return rc;
120
150
 }
151
+EXPORT_SYMBOL_GPL(ocxl_afu_irq_alloc);
121
152
 
122
153
 static void afu_irq_free(struct afu_irq *irq, struct ocxl_context *ctx)
123
154
 {
124
155
 	trace_ocxl_afu_irq_free(ctx->pasid, irq->id);
125
156
 	if (ctx->mapping)
126
157
 		unmap_mapping_range(ctx->mapping,
127
-				irq_id_to_offset(ctx, irq->id),
158
+				ocxl_irq_id_to_offset(ctx, irq->id),
128
159
 				1 << PAGE_SHIFT, 1);
129
160
 	release_afu_irq(irq);
130
-	if (irq->ev_ctx)
131
-		eventfd_ctx_put(irq->ev_ctx);
161
+	if (irq->free_private)
162
+		irq->free_private(irq->private);
132
163
 	ocxl_link_free_irq(ctx->afu->fn->link, irq->hw_irq);
133
164
 	kfree(irq);
134
165
 }
135
166
 
136
-int ocxl_afu_irq_free(struct ocxl_context *ctx, u64 irq_offset)
167
+int ocxl_afu_irq_free(struct ocxl_context *ctx, int irq_id)
137
168
 {
138
169
 	struct afu_irq *irq;
139
-	int id = irq_offset_to_id(ctx, irq_offset);
140
170
 
141
171
 	mutex_lock(&ctx->irq_lock);
142
172
 
143
-	irq = idr_find(&ctx->irq_idr, id);
173
+	irq = idr_find(&ctx->irq_idr, irq_id);
144
174
 	if (!irq) {
145
175
 		mutex_unlock(&ctx->irq_lock);
146
176
 		return -EINVAL;
..
..
@@ -150,6 +180,7 @@
150
180
 	mutex_unlock(&ctx->irq_lock);
151
181
 	return 0;
152
182
 }
183
+EXPORT_SYMBOL_GPL(ocxl_afu_irq_free);
153
184
 
154
185
 void ocxl_afu_irq_free_all(struct ocxl_context *ctx)
155
186
 {
..
..
@@ -162,41 +193,19 @@
162
193
 	mutex_unlock(&ctx->irq_lock);
163
194
 }
164
195
 
165
-int ocxl_afu_irq_set_fd(struct ocxl_context *ctx, u64 irq_offset, int eventfd)
196
+u64 ocxl_afu_irq_get_addr(struct ocxl_context *ctx, int irq_id)
166
197
 {
198
+	struct xive_irq_data *xd;
167
199
 	struct afu_irq *irq;
168
-	struct eventfd_ctx *ev_ctx;
169
-	int rc = 0, id = irq_offset_to_id(ctx, irq_offset);
170
-
171
-	mutex_lock(&ctx->irq_lock);
172
-	irq = idr_find(&ctx->irq_idr, id);
173
-	if (!irq) {
174
-		rc = -EINVAL;
175
-		goto unlock;
176
-	}
177
-
178
-	ev_ctx = eventfd_ctx_fdget(eventfd);
179
-	if (IS_ERR(ev_ctx)) {
180
-		rc = -EINVAL;
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-		goto unlock;
182
-	}
183
-
184
-	irq->ev_ctx = ev_ctx;
185
-unlock:
186
-	mutex_unlock(&ctx->irq_lock);
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-	return rc;
188
-}
189
-
190
-u64 ocxl_afu_irq_get_addr(struct ocxl_context *ctx, u64 irq_offset)
191
-{
192
-	struct afu_irq *irq;
193
-	int id = irq_offset_to_id(ctx, irq_offset);
194
200
 	u64 addr = 0;
195
201
 
196
202
 	mutex_lock(&ctx->irq_lock);
197
-	irq = idr_find(&ctx->irq_idr, id);
198
-	if (irq)
199
-		addr = irq->trigger_page;
203
+	irq = idr_find(&ctx->irq_idr, irq_id);
204
+	if (irq) {
205
+		xd = irq_get_handler_data(irq->virq);
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+		addr = xd ? xd->trig_page : 0;
207
+	}
200
208
 	mutex_unlock(&ctx->irq_lock);
201
209
 	return addr;
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210
 }
211
+EXPORT_SYMBOL_GPL(ocxl_afu_irq_get_addr);