blob: 5de501c78c384922b573391226779c083a9a021e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
#ifndef _PCIDRIVER_COMMON_H
#define _PCIDRIVER_COMMON_H
#include "pcilib_types.h"
/*************************************************************************/
/* Private data types and structures */
/* Define an entry in the kmem list (this list is per device) */
/* This list keeps references to the allocated kernel buffers */
typedef struct {
int id;
struct list_head list;
dma_addr_t dma_handle;
unsigned long cpua;
unsigned long size;
unsigned long type;
unsigned long use;
unsigned long item;
spinlock_t lock;
unsigned long mode;
unsigned long refs;
struct class_device_attribute sysfs_attr; /* initialized when adding the entry */
} pcidriver_kmem_entry_t;
/* Define an entry in the umem list (this list is per device) */
/* This list keeps references to the SG lists for each mapped userspace region */
typedef struct {
int id;
struct list_head list;
unsigned int nr_pages; /* number of pages for this user memeory area */
struct page **pages; /* list of pointers to the pages */
unsigned int nents; /* actual entries in the scatter/gatter list (NOT nents for the map function, but the result) */
struct scatterlist *sg; /* list of sg entries */
struct class_device_attribute sysfs_attr; /* initialized when adding the entry */
} pcidriver_umem_entry_t;
/* Hold the driver private data */
typedef struct {
dev_t devno; /* device number (major and minor) */
struct pci_dev *pdev; /* PCI device */
struct class_device *class_dev; /* Class device */
struct cdev cdev; /* char device struct */
int mmap_mode; /* current mmap mode */
int mmap_area; /* current PCI mmap area */
#ifdef ENABLE_IRQ
int irq_enabled; /* Non-zero if IRQ is enabled */
int irq_count; /* Just an IRQ counter */
wait_queue_head_t irq_queues[ PCIDRIVER_INT_MAXSOURCES ];
/* One queue per interrupt source */
atomic_t irq_outstanding[ PCIDRIVER_INT_MAXSOURCES ];
/* Outstanding interrupts per queue */
volatile unsigned int *bars_kmapped[6]; /* PCI BARs mmapped in kernel space */
#endif
spinlock_t kmemlist_lock; /* Spinlock to lock kmem list operations */
struct list_head kmem_list; /* List of 'kmem_list_entry's associated with this device */
atomic_t kmem_count; /* id for next kmem entry */
int kmem_cur_id; /* Currently selected kmem buffer, for mmap */
spinlock_t umemlist_lock; /* Spinlock to lock umem list operations */
struct list_head umem_list; /* List of 'umem_list_entry's associated with this device */
atomic_t umem_count; /* id for next umem entry */
int msi_mode; /* Flag specifying if interrupt have been initialized in MSI mode */
atomic_t refs; /* Reference counter */
} pcidriver_privdata_t;
void pcidriver_module_get(pcidriver_privdata_t *privdata);
void pcidriver_module_put(pcidriver_privdata_t *privdata);
/*************************************************************************/
/* Some nice defines that make code more readable */
/* This is to print nice info in the log */
#ifdef DEBUG
#define mod_info( args... ) \
do { printk( KERN_INFO "%s - %s : ", MODNAME , __FUNCTION__ );\
printk( args ); } while(0)
#define mod_info_dbg( args... ) \
do { printk( KERN_INFO "%s - %s : ", MODNAME , __FUNCTION__ );\
printk( args ); } while(0)
#else
#define mod_info( args... ) \
do { printk( KERN_INFO "%s: ", MODNAME );\
printk( args ); } while(0)
#define mod_info_dbg( args... )
#endif
#define mod_crit( args... ) \
do { printk( KERN_CRIT "%s: ", MODNAME );\
printk( args ); } while(0)
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
|
