[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / xen / xen-pciback / conf_space.h

/*
 * PCI Backend - Common data structures for overriding the configuration space
 *
 * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
 */

#ifndef __XEN_PCIBACK_CONF_SPACE_H__
#define __XEN_PCIBACK_CONF_SPACE_H__

#include <linux/list.h>
#include <linux/err.h>

/* conf_field_init can return an errno in a ptr with ERR_PTR() */
typedef void *(*conf_field_init) (struct pci_dev *dev, int offset);
typedef void (*conf_field_reset) (struct pci_dev *dev, int offset, void *data);
typedef void (*conf_field_free) (struct pci_dev *dev, int offset, void *data);

typedef int (*conf_dword_write) (struct pci_dev *dev, int offset, u32 value,
				 void *data);
typedef int (*conf_word_write) (struct pci_dev *dev, int offset, u16 value,
				void *data);
typedef int (*conf_byte_write) (struct pci_dev *dev, int offset, u8 value,
				void *data);
typedef int (*conf_dword_read) (struct pci_dev *dev, int offset, u32 *value,
				void *data);
typedef int (*conf_word_read) (struct pci_dev *dev, int offset, u16 *value,
			       void *data);
typedef int (*conf_byte_read) (struct pci_dev *dev, int offset, u8 *value,
			       void *data);

/* These are the fields within the configuration space which we
 * are interested in intercepting reads/writes to and changing their
 * values.
 */
struct config_field {
	unsigned int offset;
	unsigned int size;
	unsigned int mask;
	conf_field_init init;
	conf_field_reset reset;
	conf_field_free release;
	void (*clean) (struct config_field *field);
	union {
		struct {
			conf_dword_write write;
			conf_dword_read read;
		} dw;
		struct {
			conf_word_write write;
			conf_word_read read;
		} w;
		struct {
			conf_byte_write write;
			conf_byte_read read;
		} b;
	} u;
	struct list_head list;
};

struct config_field_entry {
	struct list_head list;
	const struct config_field *field;
	unsigned int base_offset;
	void *data;
};

extern bool xen_pcibk_permissive;

#define OFFSET(cfg_entry) ((cfg_entry)->base_offset+(cfg_entry)->field->offset)

/* Add fields to a device - the add_fields macro expects to get a pointer to
 * the first entry in an array (of which the ending is marked by size==0)
 */
int xen_pcibk_config_add_field_offset(struct pci_dev *dev,
				    const struct config_field *field,
				    unsigned int offset);

static inline int xen_pcibk_config_add_field(struct pci_dev *dev,
					   const struct config_field *field)
{
	return xen_pcibk_config_add_field_offset(dev, field, 0);
}

static inline int xen_pcibk_config_add_fields(struct pci_dev *dev,
					    const struct config_field *field)
{
	int i, err = 0;
	for (i = 0; field[i].size != 0; i++) {
		err = xen_pcibk_config_add_field(dev, &field[i]);
		if (err)
			break;
	}
	return err;
}

static inline int xen_pcibk_config_add_fields_offset(struct pci_dev *dev,
					const struct config_field *field,
					unsigned int offset)
{
	int i, err = 0;
	for (i = 0; field[i].size != 0; i++) {
		err = xen_pcibk_config_add_field_offset(dev, &field[i], offset);
		if (err)
			break;
	}
	return err;
}

/* Read/Write the real configuration space */
int xen_pcibk_read_config_byte(struct pci_dev *dev, int offset, u8 *value,
			       void *data);
int xen_pcibk_read_config_word(struct pci_dev *dev, int offset, u16 *value,
			       void *data);
int xen_pcibk_read_config_dword(struct pci_dev *dev, int offset, u32 *value,
				void *data);
int xen_pcibk_write_config_byte(struct pci_dev *dev, int offset, u8 value,
				 void *data);
int xen_pcibk_write_config_word(struct pci_dev *dev, int offset, u16 value,
				void *data);
int xen_pcibk_write_config_dword(struct pci_dev *dev, int offset, u32 value,
				 void *data);

int xen_pcibk_config_capability_init(void);

int xen_pcibk_config_header_add_fields(struct pci_dev *dev);
int xen_pcibk_config_capability_add_fields(struct pci_dev *dev);

#endif				/* __XEN_PCIBACK_CONF_SPACE_H__ */
Commit	Line	Data
30edc14b KRW	1	/*
	2	* PCI Backend - Common data structures for overriding the configuration space
	3	*
	4	* Author: Ryan Wilson <hap9@epoch.ncsc.mil>
	5	*/
	6
	7	#ifndef __XEN_PCIBACK_CONF_SPACE_H__
	8	#define __XEN_PCIBACK_CONF_SPACE_H__
	9
	10	#include <linux/list.h>
	11	#include <linux/err.h>
	12
	13	/* conf_field_init can return an errno in a ptr with ERR_PTR() */
	14	typedef void (conf_field_init) (struct pci_dev *dev, int offset);
	15	typedef void (conf_field_reset) (struct pci_dev dev, int offset, void *data);
	16	typedef void (conf_field_free) (struct pci_dev dev, int offset, void *data);
	17
	18	typedef int (conf_dword_write) (struct pci_dev dev, int offset, u32 value,
	19	void *data);
	20	typedef int (conf_word_write) (struct pci_dev dev, int offset, u16 value,
	21	void *data);
	22	typedef int (conf_byte_write) (struct pci_dev dev, int offset, u8 value,
	23	void *data);
	24	typedef int (conf_dword_read) (struct pci_dev dev, int offset, u32 *value,
	25	void *data);
	26	typedef int (conf_word_read) (struct pci_dev dev, int offset, u16 *value,
	27	void *data);
	28	typedef int (conf_byte_read) (struct pci_dev dev, int offset, u8 *value,
	29	void *data);
	30
	31	/* These are the fields within the configuration space which we
	32	* are interested in intercepting reads/writes to and changing their
	33	* values.
	34	*/
	35	struct config_field {
	36	unsigned int offset;
	37	unsigned int size;
	38	unsigned int mask;
	39	conf_field_init init;
	40	conf_field_reset reset;
	41	conf_field_free release;
	42	void (clean) (struct config_field field);
	43	union {
	44	struct {
	45	conf_dword_write write;
	46	conf_dword_read read;
	47	} dw;
	48	struct {
	49	conf_word_write write;
	50	conf_word_read read;
	51	} w;
	52	struct {
	53	conf_byte_write write;
	54	conf_byte_read read;
	55	} b;
	56	} u;
	57	struct list_head list;
	58	};
	59
	60	struct config_field_entry {
	61	struct list_head list;
	62	const struct config_field *field;
	63	unsigned int base_offset;
	64	void *data;
65	};
66
f014225a	67	extern bool xen_pcibk_permissive;
1c335229	68
30edc14b KRW	69	#define OFFSET(cfg_entry) ((cfg_entry)->base_offset+(cfg_entry)->field->offset)
	70
	71	/* Add fields to a device - the add_fields macro expects to get a pointer to
	72	* the first entry in an array (of which the ending is marked by size==0)
	73	*/
a92336a1	74	int xen_pcibk_config_add_field_offset(struct pci_dev *dev,
30edc14b KRW	75	const struct config_field *field,
	76	unsigned int offset);
	77
a92336a1	78	static inline int xen_pcibk_config_add_field(struct pci_dev *dev,
30edc14b KRW	79	const struct config_field *field)
30edc14b KRW	80	{
a92336a1	81	return xen_pcibk_config_add_field_offset(dev, field, 0);
30edc14b KRW	82	}
30edc14b KRW	83
a92336a1	84	static inline int xen_pcibk_config_add_fields(struct pci_dev *dev,
30edc14b KRW	85	const struct config_field *field)
	86	{
	87	int i, err = 0;
	88	for (i = 0; field[i].size != 0; i++) {
a92336a1	89	err = xen_pcibk_config_add_field(dev, &field[i]);
30edc14b KRW	90	if (err)
	91	break;
	92	}
	93	return err;
	94	}
	95
a92336a1	96	static inline int xen_pcibk_config_add_fields_offset(struct pci_dev *dev,
30edc14b KRW	97	const struct config_field *field,
	98	unsigned int offset)
	99	{
	100	int i, err = 0;
	101	for (i = 0; field[i].size != 0; i++) {
a92336a1	102	err = xen_pcibk_config_add_field_offset(dev, &field[i], offset);
30edc14b KRW	103	if (err)
	104	break;
	105	}
	106	return err;
	107	}
	108
	109	/* Read/Write the real configuration space */
a92336a1	110	int xen_pcibk_read_config_byte(struct pci_dev dev, int offset, u8 value,
30edc14b	111	void *data);
a92336a1 KRW	112	int xen_pcibk_read_config_word(struct pci_dev dev, int offset, u16 value,
	113	void *data);
	114	int xen_pcibk_read_config_dword(struct pci_dev dev, int offset, u32 value,
	115	void *data);
	116	int xen_pcibk_write_config_byte(struct pci_dev *dev, int offset, u8 value,
	117	void *data);
	118	int xen_pcibk_write_config_word(struct pci_dev *dev, int offset, u16 value,
	119	void *data);
	120	int xen_pcibk_write_config_dword(struct pci_dev *dev, int offset, u32 value,
	121	void *data);
30edc14b	122
a92336a1	123	int xen_pcibk_config_capability_init(void);
30edc14b	124
a92336a1 KRW	125	int xen_pcibk_config_header_add_fields(struct pci_dev *dev);
a92336a1 KRW	126	int xen_pcibk_config_capability_add_fields(struct pci_dev *dev);
30edc14b KRW	127
30edc14b KRW	128	#endif /* __XEN_PCIBACK_CONF_SPACE_H__ */