add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/pci/endpoint/pci-epf-core.c
..
..
@@ -1,5 +1,5 @@
1
1
 // SPDX-License-Identifier: GPL-2.0
2
-/**
2
+/*
3
3
  * PCI Endpoint *Function* (EPF) library
4
4
  *
5
5
  * Copyright (C) 2017 Texas Instruments
..
..
@@ -21,26 +21,6 @@
21
21
 static const struct device_type pci_epf_type;
22
22
 
23
23
 /**
24
- * pci_epf_linkup() - Notify the function driver that EPC device has
25
- *		      established a connection with the Root Complex.
26
- * @epf: the EPF device bound to the EPC device which has established
27
- *	 the connection with the host
28
- *
29
- * Invoke to notify the function driver that EPC device has established
30
- * a connection with the Root Complex.
31
- */
32
-void pci_epf_linkup(struct pci_epf *epf)
33
-{
34
-	if (!epf->driver) {
35
-		dev_WARN(&epf->dev, "epf device not bound to driver\n");
36
-		return;
37
-	}
38
-
39
-	epf->driver->ops->linkup(epf);
40
-}
41
-EXPORT_SYMBOL_GPL(pci_epf_linkup);
42
-
43
-/**
44
24
  * pci_epf_unbind() - Notify the function driver that the binding between the
45
25
  *		      EPF device and EPC device has been lost
46
26
  * @epf: the EPF device which has lost the binding with the EPC device
..
..
@@ -55,7 +35,9 @@
55
35
 		return;
56
36
 	}
57
37
 
38
+	mutex_lock(&epf->lock);
58
39
 	epf->driver->ops->unbind(epf);
40
+	mutex_unlock(&epf->lock);
59
41
 	module_put(epf->driver->owner);
60
42
 }
61
43
 EXPORT_SYMBOL_GPL(pci_epf_unbind);
..
..
@@ -69,6 +51,8 @@
69
51
  */
70
52
 int pci_epf_bind(struct pci_epf *epf)
71
53
 {
54
+	int ret;
55
+
72
56
 	if (!epf->driver) {
73
57
 		dev_WARN(&epf->dev, "epf device not bound to driver\n");
74
58
 		return -EINVAL;
..
..
@@ -77,12 +61,17 @@
77
61
 	if (!try_module_get(epf->driver->owner))
78
62
 		return -EAGAIN;
79
63
 
80
-	return epf->driver->ops->bind(epf);
64
+	mutex_lock(&epf->lock);
65
+	ret = epf->driver->ops->bind(epf);
66
+	mutex_unlock(&epf->lock);
67
+
68
+	return ret;
81
69
 }
82
70
 EXPORT_SYMBOL_GPL(pci_epf_bind);
83
71
 
84
72
 /**
85
73
  * pci_epf_free_space() - free the allocated PCI EPF register space
74
+ * @epf: the EPF device from whom to free the memory
86
75
  * @addr: the virtual address of the PCI EPF register space
87
76
  * @bar: the BAR number corresponding to the register space
88
77
  *
..
..
@@ -99,6 +88,7 @@
99
88
 			  epf->bar[bar].phys_addr);
100
89
 
101
90
 	epf->bar[bar].phys_addr = 0;
91
+	epf->bar[bar].addr = NULL;
102
92
 	epf->bar[bar].size = 0;
103
93
 	epf->bar[bar].barno = 0;
104
94
 	epf->bar[bar].flags = 0;
..
..
@@ -107,12 +97,15 @@
107
97
 
108
98
 /**
109
99
  * pci_epf_alloc_space() - allocate memory for the PCI EPF register space
100
+ * @epf: the EPF device to whom allocate the memory
110
101
  * @size: the size of the memory that has to be allocated
111
102
  * @bar: the BAR number corresponding to the allocated register space
103
+ * @align: alignment size for the allocation region
112
104
  *
113
105
  * Invoke to allocate memory for the PCI EPF register space.
114
106
  */
115
-void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar)
107
+void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
108
+			  size_t align)
116
109
 {
117
110
 	void *space;
118
111
 	struct device *dev = epf->epc->dev.parent;
..
..
@@ -120,7 +113,11 @@
120
113
 
121
114
 	if (size < 128)
122
115
 		size = 128;
123
-	size = roundup_pow_of_two(size);
116
+
117
+	if (align)
118
+		size = ALIGN(size, align);
119
+	else
120
+		size = roundup_pow_of_two(size);
124
121
 
125
122
 	space = dma_alloc_coherent(dev, size, &phys_addr, GFP_KERNEL);
126
123
 	if (!space) {
..
..
@@ -129,9 +126,12 @@
129
126
 	}
130
127
 
131
128
 	epf->bar[bar].phys_addr = phys_addr;
129
+	epf->bar[bar].addr = space;
132
130
 	epf->bar[bar].size = size;
133
131
 	epf->bar[bar].barno = bar;
134
-	epf->bar[bar].flags = PCI_BASE_ADDRESS_SPACE_MEMORY;
132
+	epf->bar[bar].flags |= upper_32_bits(size) ?
133
+				PCI_BASE_ADDRESS_MEM_TYPE_64 :
134
+				PCI_BASE_ADDRESS_MEM_TYPE_32;
135
135
 
136
136
 	return space;
137
137
 }
..
..
@@ -206,7 +206,7 @@
206
206
 	if (!driver->ops)
207
207
 		return -EINVAL;
208
208
 
209
-	if (!driver->ops->bind || !driver->ops->unbind || !driver->ops->linkup)
209
+	if (!driver->ops->bind || !driver->ops->unbind)
210
210
 		return -EINVAL;
211
211
 
212
212
 	driver->driver.bus = &pci_epf_bus_type;
..
..
@@ -264,6 +264,7 @@
264
264
 	device_initialize(dev);
265
265
 	dev->bus = &pci_epf_bus_type;
266
266
 	dev->type = &pci_epf_type;
267
+	mutex_init(&epf->lock);
267
268
 
268
269
 	ret = dev_set_name(dev, "%s", name);
269
270
 	if (ret) {