ipath_kernel.h

来自「LINUX 2.6.17.4的源码」· C头文件 代码 · 共 884 行 · 第 1/2 页

	u32 ipath_rcvegrbase;
	/* kr_rcvegrcnt value */
	u32 ipath_rcvegrcnt;
	/* kr_rcvtidbase value */
	u32 ipath_rcvtidbase;
	/* kr_rcvtidcnt value */
	u32 ipath_rcvtidcnt;
	/* kr_sendregbase */
	u32 ipath_sregbase;
	/* kr_userregbase */
	u32 ipath_uregbase;
	/* kr_counterregbase */
	u32 ipath_cregbase;
	/* shadow the control register contents */
	u32 ipath_control;
	/* shadow the gpio output contents */
	u32 ipath_extctrl;
	/* PCI revision register (HTC rev on FPGA) */
	u32 ipath_pcirev;

	/* chip address space used by 4k pio buffers */
	u32 ipath_4kalign;
	/* The MTU programmed for this unit */
	u32 ipath_ibmtu;
	/*
	 * The max size IB packet, included IB headers that we can send.
	 * Starts same as ipath_piosize, but is affected when ibmtu is
	 * changed, or by size of eager buffers
	 */
	u32 ipath_ibmaxlen;
	/*
	 * ibmaxlen at init time, limited by chip and by receive buffer
	 * size.  Not changed after init.
	 */
	u32 ipath_init_ibmaxlen;
	/* size of each rcvegrbuffer */
	u32 ipath_rcvegrbufsize;
	/* width (2,4,8,16,32) from HT config reg */
	u32 ipath_htwidth;
	/* HT speed (200,400,800,1000) from HT config */
	u32 ipath_htspeed;
	/* ports waiting for PIOavail intr */
	unsigned long ipath_portpiowait;
	/*
	 * number of sequential ibcstatus change for polling active/quiet
	 * (i.e., link not coming up).
	 */
	u32 ipath_ibpollcnt;
	/* low and high portions of MSI capability/vector */
	u32 ipath_msi_lo;
	/* saved after PCIe init for restore after reset */
	u32 ipath_msi_hi;
	/* MSI data (vector) saved for restore */
	u16 ipath_msi_data;
	/* MLID programmed for this instance */
	u16 ipath_mlid;
	/* LID programmed for this instance */
	u16 ipath_lid;
	/* list of pkeys programmed; 0 if not set */
	u16 ipath_pkeys[4];
	/* ASCII serial number, from flash */
	u8 ipath_serial[12];
	/* human readable board version */
	u8 ipath_boardversion[80];
	/* chip major rev, from ipath_revision */
	u8 ipath_majrev;
	/* chip minor rev, from ipath_revision */
	u8 ipath_minrev;
	/* board rev, from ipath_revision */
	u8 ipath_boardrev;
	/* unit # of this chip, if present */
	int ipath_unit;
	/* saved for restore after reset */
	u8 ipath_pci_cacheline;
	/* LID mask control */
	u8 ipath_lmc;
};

extern volatile __le64 *ipath_port0_rcvhdrtail;
extern dma_addr_t ipath_port0_rcvhdrtail_dma;

#define IPATH_PORT0_RCVHDRTAIL_SIZE PAGE_SIZE

extern struct list_head ipath_dev_list;
extern spinlock_t ipath_devs_lock;
extern struct ipath_devdata *ipath_lookup(int unit);

extern u16 ipath_layer_rcv_opcode;
extern int __ipath_layer_intr(struct ipath_devdata *, u32);
extern int ipath_layer_intr(struct ipath_devdata *, u32);
extern int __ipath_layer_rcv(struct ipath_devdata *, void *,
			     struct sk_buff *);
extern int __ipath_layer_rcv_lid(struct ipath_devdata *, void *);
extern int __ipath_verbs_piobufavail(struct ipath_devdata *);
extern int __ipath_verbs_rcv(struct ipath_devdata *, void *, void *, u32);

void ipath_layer_add(struct ipath_devdata *);
void ipath_layer_del(struct ipath_devdata *);

int ipath_init_chip(struct ipath_devdata *, int);
int ipath_enable_wc(struct ipath_devdata *dd);
void ipath_disable_wc(struct ipath_devdata *dd);
int ipath_count_units(int *npresentp, int *nupp, u32 *maxportsp);
void ipath_shutdown_device(struct ipath_devdata *);

struct file_operations;
int ipath_cdev_init(int minor, char *name, struct file_operations *fops,
		    struct cdev **cdevp, struct class_device **class_devp);
void ipath_cdev_cleanup(struct cdev **cdevp,
			struct class_device **class_devp);

int ipath_diag_init(void);
void ipath_diag_cleanup(void);
void ipath_diag_bringup_link(struct ipath_devdata *);

extern wait_queue_head_t ipath_sma_state_wait;

int ipath_user_add(struct ipath_devdata *dd);
void ipath_user_del(struct ipath_devdata *dd);

struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, gfp_t);

extern int ipath_diag_inuse;

irqreturn_t ipath_intr(int irq, void *devid, struct pt_regs *regs);
void ipath_decode_err(char *buf, size_t blen, ipath_err_t err);
#if __IPATH_INFO || __IPATH_DBG
extern const char *ipath_ibcstatus_str[];
#endif

/* clean up any per-chip chip-specific stuff */
void ipath_chip_cleanup(struct ipath_devdata *);
/* clean up any chip type-specific stuff */
void ipath_chip_done(void);

/* check to see if we have to force ordering for write combining */
int ipath_unordered_wc(void);

void ipath_disarm_piobufs(struct ipath_devdata *, unsigned first,
			  unsigned cnt);

int ipath_create_rcvhdrq(struct ipath_devdata *, struct ipath_portdata *);
void ipath_free_pddata(struct ipath_devdata *, u32, int);

int ipath_parse_ushort(const char *str, unsigned short *valp);

int ipath_wait_linkstate(struct ipath_devdata *, u32, int);
void ipath_set_ib_lstate(struct ipath_devdata *, int);
void ipath_kreceive(struct ipath_devdata *);
int ipath_setrcvhdrsize(struct ipath_devdata *, unsigned);
int ipath_reset_device(int);
void ipath_get_faststats(unsigned long);

/* for use in system calls, where we want to know device type, etc. */
#define port_fp(fp) ((struct ipath_portdata *) (fp)->private_data)

/*
 * values for ipath_flags
 */
/* The chip is up and initted */
#define IPATH_INITTED       0x2
		/* set if any user code has set kr_rcvhdrsize */
#define IPATH_RCVHDRSZ_SET  0x4
		/* The chip is present and valid for accesses */
#define IPATH_PRESENT       0x8
		/* HT link0 is only 8 bits wide, ignore upper byte crc
		 * errors, etc. */
#define IPATH_8BIT_IN_HT0   0x10
		/* HT link1 is only 8 bits wide, ignore upper byte crc
		 * errors, etc. */
#define IPATH_8BIT_IN_HT1   0x20
		/* The link is down */
#define IPATH_LINKDOWN      0x40
		/* The link level is up (0x11) */
#define IPATH_LINKINIT      0x80
		/* The link is in the armed (0x21) state */
#define IPATH_LINKARMED     0x100
		/* The link is in the active (0x31) state */
#define IPATH_LINKACTIVE    0x200
		/* link current state is unknown */
#define IPATH_LINKUNK       0x400
		/* no IB cable, or no device on IB cable */
#define IPATH_NOCABLE       0x4000
		/* Supports port zero per packet receive interrupts via
		 * GPIO */
#define IPATH_GPIO_INTR     0x8000
		/* uses the coded 4byte TID, not 8 byte */
#define IPATH_4BYTE_TID     0x10000
		/* packet/word counters are 32 bit, else those 4 counters
		 * are 64bit */
#define IPATH_32BITCOUNTERS 0x20000
		/* can miss port0 rx interrupts */
#define IPATH_POLL_RX_INTR  0x40000
#define IPATH_DISABLED      0x80000 /* administratively disabled */

/* portdata flag bit offsets */
		/* waiting for a packet to arrive */
#define IPATH_PORT_WAITING_RCV   2
		/* waiting for a PIO buffer to be available */
#define IPATH_PORT_WAITING_PIO   3

/* free up any allocated data at closes */
void ipath_free_data(struct ipath_portdata *dd);
int ipath_waitfor_mdio_cmdready(struct ipath_devdata *);
int ipath_waitfor_complete(struct ipath_devdata *, ipath_kreg, u64, u64 *);
u32 __iomem *ipath_getpiobuf(struct ipath_devdata *, u32 *);
/* init PE-800-specific func */
void ipath_init_pe800_funcs(struct ipath_devdata *);
/* init HT-400-specific func */
void ipath_init_ht400_funcs(struct ipath_devdata *);
void ipath_get_eeprom_info(struct ipath_devdata *);
u64 ipath_snap_cntr(struct ipath_devdata *, ipath_creg);

/*
 * number of words used for protocol header if not set by ipath_userinit();
 */
#define IPATH_DFLT_RCVHDRSIZE 9

#define IPATH_MDIO_CMD_WRITE   1
#define IPATH_MDIO_CMD_READ    2
#define IPATH_MDIO_CLD_DIV     25	/* to get 2.5 Mhz mdio clock */
#define IPATH_MDIO_CMDVALID    0x40000000	/* bit 30 */
#define IPATH_MDIO_DATAVALID   0x80000000	/* bit 31 */
#define IPATH_MDIO_CTRL_STD    0x0

static inline u64 ipath_mdio_req(int cmd, int dev, int reg, int data)
{
	return (((u64) IPATH_MDIO_CLD_DIV) << 32) |
		(cmd << 26) |
		(dev << 21) |
		(reg << 16) |
		(data & 0xFFFF);
}

		/* signal and fifo status, in bank 31 */
#define IPATH_MDIO_CTRL_XGXS_REG_8  0x8
		/* controls loopback, redundancy */
#define IPATH_MDIO_CTRL_8355_REG_1  0x10
		/* premph, encdec, etc. */
#define IPATH_MDIO_CTRL_8355_REG_2  0x11
		/* Kchars, etc. */
#define IPATH_MDIO_CTRL_8355_REG_6  0x15
#define IPATH_MDIO_CTRL_8355_REG_9  0x18
#define IPATH_MDIO_CTRL_8355_REG_10 0x1D

int ipath_get_user_pages(unsigned long, size_t, struct page **);
int ipath_get_user_pages_nocopy(unsigned long, struct page **);
void ipath_release_user_pages(struct page **, size_t);
void ipath_release_user_pages_on_close(struct page **, size_t);
int ipath_eeprom_read(struct ipath_devdata *, u8, void *, int);
int ipath_eeprom_write(struct ipath_devdata *, u8, const void *, int);

/* these are used for the registers that vary with port */
void ipath_write_kreg_port(const struct ipath_devdata *, ipath_kreg,
			   unsigned, u64);
u64 ipath_read_kreg64_port(const struct ipath_devdata *, ipath_kreg,
			   unsigned);

/*
 * We could have a single register get/put routine, that takes a group type,
 * but this is somewhat clearer and cleaner.  It also gives us some error
 * checking.  64 bit register reads should always work, but are inefficient
 * on opteron (the northbridge always generates 2 separate HT 32 bit reads),
 * so we use kreg32 wherever possible.  User register and counter register
 * reads are always 32 bit reads, so only one form of those routines.
 */

/*
 * At the moment, none of the s-registers are writable, so no
 * ipath_write_sreg(), and none of the c-registers are writable, so no
 * ipath_write_creg().
 */

/**
 * ipath_read_ureg32 - read 32-bit virtualized per-port register
 * @dd: device
 * @regno: register number
 * @port: port number
 *
 * Return the contents of a register that is virtualized to be per port.
 * Prints a debug message and returns -1 on errors (not distinguishable from
 * valid contents at runtime; we may add a separate error variable at some
 * point).
 *
 * This is normally not used by the kernel, but may be for debugging, and
 * has a different implementation than user mode, which is why it's not in
 * _common.h.
 */
static inline u32 ipath_read_ureg32(const struct ipath_devdata *dd,
				    ipath_ureg regno, int port)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return 0;

	return readl(regno + (u64 __iomem *)
		     (dd->ipath_uregbase +
		      (char __iomem *)dd->ipath_kregbase +
		      dd->ipath_palign * port));
}

/**
 * ipath_write_ureg - write 32-bit virtualized per-port register
 * @dd: device
 * @regno: register number
 * @value: value
 * @port: port
 *
 * Write the contents of a register that is virtualized to be per port.
 */
static inline void ipath_write_ureg(const struct ipath_devdata *dd,
				    ipath_ureg regno, u64 value, int port)
{
	u64 __iomem *ubase = (u64 __iomem *)
		(dd->ipath_uregbase + (char __iomem *) dd->ipath_kregbase +
		 dd->ipath_palign * port);
	if (dd->ipath_kregbase)
		writeq(value, &ubase[regno]);
}

static inline u32 ipath_read_kreg32(const struct ipath_devdata *dd,
				    ipath_kreg regno)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return -1;
	return readl((u32 __iomem *) & dd->ipath_kregbase[regno]);
}

static inline u64 ipath_read_kreg64(const struct ipath_devdata *dd,
				    ipath_kreg regno)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return -1;

	return readq(&dd->ipath_kregbase[regno]);
}

static inline void ipath_write_kreg(const struct ipath_devdata *dd,
				    ipath_kreg regno, u64 value)
{
	if (dd->ipath_kregbase)
		writeq(value, &dd->ipath_kregbase[regno]);
}

static inline u64 ipath_read_creg(const struct ipath_devdata *dd,
				  ipath_sreg regno)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return 0;

	return readq(regno + (u64 __iomem *)
		     (dd->ipath_cregbase +
		      (char __iomem *)dd->ipath_kregbase));
}

static inline u32 ipath_read_creg32(const struct ipath_devdata *dd,
					 ipath_sreg regno)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return 0;
	return readl(regno + (u64 __iomem *)
		     (dd->ipath_cregbase +
		      (char __iomem *)dd->ipath_kregbase));
}

/*
 * sysfs interface.
 */

struct device_driver;

extern const char ipath_core_version[];

int ipath_driver_create_group(struct device_driver *);
void ipath_driver_remove_group(struct device_driver *);

int ipath_device_create_group(struct device *, struct ipath_devdata *);
void ipath_device_remove_group(struct device *, struct ipath_devdata *);
int ipath_expose_reset(struct device *);

int ipath_init_ipathfs(void);
void ipath_exit_ipathfs(void);
int ipathfs_add_device(struct ipath_devdata *);
int ipathfs_remove_device(struct ipath_devdata *);

/*
 * Flush write combining store buffers (if present) and perform a write
 * barrier.
 */
#if defined(CONFIG_X86_64)
#define ipath_flush_wc() asm volatile("sfence" ::: "memory")
#else
#define ipath_flush_wc() wmb()
#endif

extern unsigned ipath_debug; /* debugging bit mask */

const char *ipath_get_unit_name(int unit);

extern struct mutex ipath_mutex;

#define IPATH_DRV_NAME		"ipath_core"
#define IPATH_MAJOR		233
#define IPATH_SMA_MINOR		128
#define IPATH_DIAG_MINOR	129
#define IPATH_NMINORS		130

#define ipath_dev_err(dd,fmt,...) \
	do { \
		const struct ipath_devdata *__dd = (dd); \
		if (__dd->pcidev) \
			dev_err(&__dd->pcidev->dev, "%s: " fmt, \
				ipath_get_unit_name(__dd->ipath_unit), \
				##__VA_ARGS__); \
		else \
			printk(KERN_ERR IPATH_DRV_NAME ": %s: " fmt, \
			       ipath_get_unit_name(__dd->ipath_unit), \
			       ##__VA_ARGS__); \
	} while (0)

#if _IPATH_DEBUGGING

# define __IPATH_DBG_WHICH(which,fmt,...) \
	do { \
		if(unlikely(ipath_debug&(which))) \
			printk(KERN_DEBUG IPATH_DRV_NAME ": %s: " fmt, \
			       __func__,##__VA_ARGS__); \
	} while(0)

# define ipath_dbg(fmt,...) \
	__IPATH_DBG_WHICH(__IPATH_DBG,fmt,##__VA_ARGS__)
# define ipath_cdbg(which,fmt,...) \
	__IPATH_DBG_WHICH(__IPATH_##which##DBG,fmt,##__VA_ARGS__)

#else /* ! _IPATH_DEBUGGING */

# define ipath_dbg(fmt,...)
# define ipath_cdbg(which,fmt,...)

#endif /* _IPATH_DEBUGGING */

#endif				/* _IPATH_KERNEL_H */