1 #ifndef _IPATH_KERNEL_H
2 #define _IPATH_KERNEL_H
4 * Copyright (c) 2006 QLogic, Inc. All rights reserved.
5 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
37 * This header file is the base header file for infinipath kernel code
38 * ipath_user.h serves a similar purpose for user code.
41 #include <linux/interrupt.h>
44 #include "ipath_common.h"
45 #include "ipath_debug.h"
46 #include "ipath_registers.h"
48 /* only s/w major version of InfiniPath we can handle */
49 #define IPATH_CHIP_VERS_MAJ 2U
51 /* don't care about this except printing */
52 #define IPATH_CHIP_VERS_MIN 0U
54 /* temporary, maybe always */
55 extern struct infinipath_stats ipath_stats;
57 #define IPATH_CHIP_SWVERSION IPATH_CHIP_VERS_MAJ
59 struct ipath_portdata {
60 void **port_rcvegrbuf;
61 dma_addr_t *port_rcvegrbuf_phys;
62 /* rcvhdrq base, needs mmap before useful */
64 /* kernel virtual address where hdrqtail is updated */
65 volatile __le64 *port_rcvhdrtail_kvaddr;
67 * temp buffer for expected send setup, allocated at open, instead
70 void *port_tid_pg_list;
71 /* when waiting for rcv or pioavail */
72 wait_queue_head_t port_wait;
74 * rcvegr bufs base, physical, must fit
75 * in 44 bits so 32 bit programs mmap64 44 bit works)
77 dma_addr_t port_rcvegr_phys;
78 /* mmap of hdrq, must fit in 44 bits */
79 dma_addr_t port_rcvhdrq_phys;
80 dma_addr_t port_rcvhdrqtailaddr_phys;
82 * number of opens on this instance (0 or 1; ignoring forks, dup,
87 * how much space to leave at start of eager TID entries for
88 * protocol use, on each TID
90 /* instead of calculating it */
92 /* chip offset of PIO buffers for this port */
94 /* how many alloc_pages() chunks in port_rcvegrbuf_pages */
95 u32 port_rcvegrbuf_chunks;
96 /* how many egrbufs per chunk */
97 u32 port_rcvegrbufs_perchunk;
98 /* order for port_rcvegrbuf_pages */
99 size_t port_rcvegrbuf_size;
100 /* rcvhdrq size (for freeing) */
101 size_t port_rcvhdrq_size;
102 /* next expected TID to check when looking for free */
104 /* next expected TID to check */
105 unsigned long port_flag;
106 /* WAIT_RCV that timed out, no interrupt */
108 /* WAIT_PIO that timed out, no interrupt */
110 /* WAIT_RCV already happened, no wait */
112 /* WAIT_PIO already happened, no wait */
114 /* total number of rcvhdrqfull errors */
116 /* pid of process using this port */
118 /* same size as task_struct .comm[] */
120 /* pkeys set by this use of this port */
122 /* so file ops can get at unit */
123 struct ipath_devdata *port_dd;
129 * control information for layered drivers
131 struct _ipath_layer {
135 /* Verbs layer interface */
136 struct _verbs_layer {
138 struct timer_list l_timer;
141 struct ipath_devdata {
142 struct list_head ipath_list;
144 struct ipath_kregs const *ipath_kregs;
145 struct ipath_cregs const *ipath_cregs;
147 /* mem-mapped pointer to base of chip regs */
148 u64 __iomem *ipath_kregbase;
149 /* end of mem-mapped chip space; range checking */
150 u64 __iomem *ipath_kregend;
151 /* physical address of chip for io_remap, etc. */
152 unsigned long ipath_physaddr;
153 /* base of memory alloced for ipath_kregbase, for free */
154 u64 *ipath_kregalloc;
156 * virtual address where port0 rcvhdrqtail updated for this unit.
157 * only written to by the chip, not the driver.
159 volatile __le64 *ipath_hdrqtailptr;
160 /* ipath_cfgports pointers */
161 struct ipath_portdata **ipath_pd;
162 /* sk_buffs used by port 0 eager receive queue */
163 struct sk_buff **ipath_port0_skbs;
164 /* kvirt address of 1st 2k pio buffer */
165 void __iomem *ipath_pio2kbase;
166 /* kvirt address of 1st 4k pio buffer */
167 void __iomem *ipath_pio4kbase;
169 * points to area where PIOavail registers will be DMA'ed.
170 * Has to be on a page of it's own, because the page will be
171 * mapped into user program space. This copy is *ONLY* ever
172 * written by DMA, not by the driver! Need a copy per device
173 * when we get to multiple devices
175 volatile __le64 *ipath_pioavailregs_dma;
176 /* physical address where updates occur */
177 dma_addr_t ipath_pioavailregs_phys;
178 struct _ipath_layer ipath_layer;
180 int (*ipath_f_intrsetup)(struct ipath_devdata *);
181 /* setup on-chip bus config */
182 int (*ipath_f_bus)(struct ipath_devdata *, struct pci_dev *);
183 /* hard reset chip */
184 int (*ipath_f_reset)(struct ipath_devdata *);
185 int (*ipath_f_get_boardname)(struct ipath_devdata *, char *,
187 void (*ipath_f_init_hwerrors)(struct ipath_devdata *);
188 void (*ipath_f_handle_hwerrors)(struct ipath_devdata *, char *,
190 void (*ipath_f_quiet_serdes)(struct ipath_devdata *);
191 int (*ipath_f_bringup_serdes)(struct ipath_devdata *);
192 int (*ipath_f_early_init)(struct ipath_devdata *);
193 void (*ipath_f_clear_tids)(struct ipath_devdata *, unsigned);
194 void (*ipath_f_put_tid)(struct ipath_devdata *, u64 __iomem*,
196 void (*ipath_f_tidtemplate)(struct ipath_devdata *);
197 void (*ipath_f_cleanup)(struct ipath_devdata *);
198 void (*ipath_f_setextled)(struct ipath_devdata *, u64, u64);
199 /* fill out chip-specific fields */
200 int (*ipath_f_get_base_info)(struct ipath_portdata *, void *);
201 struct _verbs_layer verbs_layer;
202 /* total dwords sent (summed from counter) */
204 /* total dwords rcvd (summed from counter) */
206 /* total packets sent (summed from counter) */
208 /* total packets rcvd (summed from counter) */
210 /* ipath_statusp initially points to this. */
212 /* GUID for this interface, in network order */
215 * aggregrate of error bits reported since last cleared, for
216 * limiting of error reporting
218 ipath_err_t ipath_lasterror;
220 * aggregrate of error bits reported since last cleared, for
221 * limiting of hwerror reporting
223 ipath_err_t ipath_lasthwerror;
225 * errors masked because they occur too fast, also includes errors
226 * that are always ignored (ipath_ignorederrs)
228 ipath_err_t ipath_maskederrs;
229 /* time in jiffies at which to re-enable maskederrs */
230 unsigned long ipath_unmasktime;
232 * errors always ignored (masked), at least for a given
233 * chip/device, because they are wrong or not useful
235 ipath_err_t ipath_ignorederrs;
236 /* count of egrfull errors, combined for all ports */
237 u64 ipath_last_tidfull;
238 /* for ipath_qcheck() */
239 u64 ipath_lastport0rcv_cnt;
240 /* template for writing TIDs */
241 u64 ipath_tidtemplate;
242 /* value to write to free TIDs */
243 u64 ipath_tidinvalid;
244 /* PE-800 rcv interrupt setup */
245 u64 ipath_rhdrhead_intr_off;
247 /* size of memory at ipath_kregbase */
249 /* number of registers used for pioavail */
251 /* IPATH_POLL, etc. */
253 /* ipath_flags sma is waiting for */
254 u32 ipath_sma_state_wanted;
255 /* last buffer for user use, first buf for kernel use is this
257 u32 ipath_lastport_piobuf;
258 /* is a stats timer active */
259 u32 ipath_stats_timer_active;
260 /* dwords sent read from counter */
262 /* dwords received read from counter */
264 /* sent packets read from counter */
266 /* received packets read from counter */
268 /* pio bufs allocated per port */
271 * number of ports configured as max; zero is set to number chip
272 * supports, less gives more pio bufs/port, etc.
275 /* port0 rcvhdrq head offset */
277 /* count of port 0 hdrqfull errors */
278 u32 ipath_p0_hdrqfull;
281 * (*cfgports) used to suppress multiple instances of same
282 * port staying stuck at same point
284 u32 *ipath_lastrcvhdrqtails;
286 * (*cfgports) used to suppress multiple instances of same
287 * port staying stuck at same point
289 u32 *ipath_lastegrheads;
291 * index of last piobuffer we used. Speeds up searching, by
292 * starting at this point. Doesn't matter if multiple cpu's use and
293 * update, last updater is only write that matters. Whenever it
294 * wraps, we update shadow copies. Need a copy per device when we
295 * get to multiple devices
297 u32 ipath_lastpioindex;
298 /* max length of freezemsg */
301 * consecutive times we wanted a PIO buffer but were unable to
304 u32 ipath_consec_nopiobuf;
306 * hint that we should update ipath_pioavailshadow before
307 * looking for a PIO buffer
309 u32 ipath_upd_pio_shadow;
310 /* so we can rewrite it after a chip reset */
312 /* so we can rewrite it after a chip reset */
314 /* sequential tries for SMA send and no bufs */
315 u32 ipath_nosma_bufs;
316 /* duration (seconds) ipath_nosma_bufs set */
317 u32 ipath_nosma_secs;
319 /* HT/PCI Vendor ID (here for NodeInfo) */
321 /* HT/PCI Device ID (here for NodeInfo) */
323 /* offset in HT config space of slave/primary interface block */
324 u8 ipath_ht_slave_off;
325 /* for write combining settings */
326 unsigned long ipath_wc_cookie;
327 /* ref count for each pkey */
328 atomic_t ipath_pkeyrefs[4];
329 /* shadow copy of all exptids physaddr; used only by funcsim */
330 u64 *ipath_tidsimshadow;
331 /* shadow copy of struct page *'s for exp tid pages */
332 struct page **ipath_pageshadow;
333 /* lock to workaround chip bug 9437 */
334 spinlock_t ipath_tid_lock;
338 * this address is mapped readonly into user processes so they can
339 * get status cheaply, whenever they want.
342 /* freeze msg if hw error put chip in freeze */
343 char *ipath_freezemsg;
344 /* pci access data structure */
345 struct pci_dev *pcidev;
346 struct cdev *user_cdev;
347 struct cdev *diag_cdev;
348 struct class_device *user_class_dev;
349 struct class_device *diag_class_dev;
350 /* timer used to prevent stats overflow, error throttling, etc. */
351 struct timer_list ipath_stats_timer;
352 /* check for stale messages in rcv queue */
353 /* only allow one intr at a time. */
354 unsigned long ipath_rcv_pending;
355 void *ipath_dummy_hdrq; /* used after port close */
356 dma_addr_t ipath_dummy_hdrq_phys;
359 * Shadow copies of registers; size indicates read access size.
360 * Most of them are readonly, but some are write-only register,
361 * where we manipulate the bits in the shadow copy, and then write
362 * the shadow copy to infinipath.
364 * We deliberately make most of these 32 bits, since they have
365 * restricted range. For any that we read, we won't to generate 32
366 * bit accesses, since Opteron will generate 2 separate 32 bit HT
367 * transactions for a 64 bit read, and we want to avoid unnecessary
371 /* This is the 64 bit group */
374 * shadow of pioavail, check to be sure it's large enough at
377 unsigned long ipath_pioavailshadow[8];
378 /* shadow of kr_gpio_out, for rmw ops */
380 /* kr_revision shadow */
383 * shadow of ibcctrl, for interrupt handling of link changes,
388 * last ibcstatus, to suppress "duplicate" status change messages,
391 u64 ipath_lastibcstat;
392 /* hwerrmask shadow */
393 ipath_err_t ipath_hwerrmask;
394 /* interrupt config reg shadow */
396 /* kr_sendpiobufbase value */
397 u64 ipath_piobufbase;
399 /* these are the "32 bit" regs */
402 * number of GUIDs in the flash for this interface; may need some
403 * rethinking for setting on other ifaces
407 * the following two are 32-bit bitmasks, but {test,clear,set}_bit
408 * all expect bit fields to be "unsigned long"
410 /* shadow kr_rcvctrl */
411 unsigned long ipath_rcvctrl;
412 /* shadow kr_sendctrl */
413 unsigned long ipath_sendctrl;
415 /* value we put in kr_rcvhdrcnt */
417 /* value we put in kr_rcvhdrsize */
418 u32 ipath_rcvhdrsize;
419 /* value we put in kr_rcvhdrentsize */
420 u32 ipath_rcvhdrentsize;
421 /* offset of last entry in rcvhdrq */
423 /* kr_portcnt value */
425 /* kr_pagealign value */
427 /* number of "2KB" PIO buffers */
429 /* size in bytes of "2KB" PIO buffers */
431 /* number of "4KB" PIO buffers */
433 /* size in bytes of "4KB" PIO buffers */
435 /* kr_rcvegrbase value */
436 u32 ipath_rcvegrbase;
437 /* kr_rcvegrcnt value */
439 /* kr_rcvtidbase value */
440 u32 ipath_rcvtidbase;
441 /* kr_rcvtidcnt value */
447 /* kr_counterregbase */
449 /* shadow the control register contents */
451 /* shadow the gpio output contents */
453 /* PCI revision register (HTC rev on FPGA) */
456 /* chip address space used by 4k pio buffers */
458 /* The MTU programmed for this unit */
461 * The max size IB packet, included IB headers that we can send.
462 * Starts same as ipath_piosize, but is affected when ibmtu is
463 * changed, or by size of eager buffers
467 * ibmaxlen at init time, limited by chip and by receive buffer
468 * size. Not changed after init.
470 u32 ipath_init_ibmaxlen;
471 /* size of each rcvegrbuffer */
472 u32 ipath_rcvegrbufsize;
473 /* width (2,4,8,16,32) from HT config reg */
475 /* HT speed (200,400,800,1000) from HT config */
477 /* ports waiting for PIOavail intr */
478 unsigned long ipath_portpiowait;
480 * number of sequential ibcstatus change for polling active/quiet
481 * (i.e., link not coming up).
484 /* low and high portions of MSI capability/vector */
486 /* saved after PCIe init for restore after reset */
488 /* MSI data (vector) saved for restore */
490 /* MLID programmed for this instance */
492 /* LID programmed for this instance */
494 /* list of pkeys programmed; 0 if not set */
497 * ASCII serial number, from flash, large enough for original
498 * all digit strings, and longer QLogic serial number format
501 /* human readable board version */
502 u8 ipath_boardversion[80];
503 /* chip major rev, from ipath_revision */
505 /* chip minor rev, from ipath_revision */
507 /* board rev, from ipath_revision */
509 /* unit # of this chip, if present */
511 /* saved for restore after reset */
512 u8 ipath_pci_cacheline;
513 /* LID mask control */
516 /* local link integrity counter */
517 u32 ipath_lli_counter;
518 /* local link integrity errors */
519 u32 ipath_lli_errors;
522 extern struct list_head ipath_dev_list;
523 extern spinlock_t ipath_devs_lock;
524 extern struct ipath_devdata *ipath_lookup(int unit);
526 extern u16 ipath_layer_rcv_opcode;
527 extern int __ipath_layer_intr(struct ipath_devdata *, u32);
528 extern int ipath_layer_intr(struct ipath_devdata *, u32);
529 extern int __ipath_layer_rcv(struct ipath_devdata *, void *,
531 extern int __ipath_layer_rcv_lid(struct ipath_devdata *, void *);
532 extern int __ipath_verbs_piobufavail(struct ipath_devdata *);
533 extern int __ipath_verbs_rcv(struct ipath_devdata *, void *, void *, u32);
535 void ipath_layer_add(struct ipath_devdata *);
536 void ipath_layer_remove(struct ipath_devdata *);
538 int ipath_init_chip(struct ipath_devdata *, int);
539 int ipath_enable_wc(struct ipath_devdata *dd);
540 void ipath_disable_wc(struct ipath_devdata *dd);
541 int ipath_count_units(int *npresentp, int *nupp, u32 *maxportsp);
542 void ipath_shutdown_device(struct ipath_devdata *);
544 struct file_operations;
545 int ipath_cdev_init(int minor, char *name, struct file_operations *fops,
546 struct cdev **cdevp, struct class_device **class_devp);
547 void ipath_cdev_cleanup(struct cdev **cdevp,
548 struct class_device **class_devp);
550 int ipath_diag_add(struct ipath_devdata *);
551 void ipath_diag_remove(struct ipath_devdata *);
552 void ipath_diag_bringup_link(struct ipath_devdata *);
554 extern wait_queue_head_t ipath_sma_state_wait;
556 int ipath_user_add(struct ipath_devdata *dd);
557 void ipath_user_remove(struct ipath_devdata *dd);
559 struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, gfp_t);
561 extern int ipath_diag_inuse;
563 irqreturn_t ipath_intr(int irq, void *devid, struct pt_regs *regs);
564 void ipath_decode_err(char *buf, size_t blen, ipath_err_t err);
565 #if __IPATH_INFO || __IPATH_DBG
566 extern const char *ipath_ibcstatus_str[];
569 /* clean up any per-chip chip-specific stuff */
570 void ipath_chip_cleanup(struct ipath_devdata *);
571 /* clean up any chip type-specific stuff */
572 void ipath_chip_done(void);
574 /* check to see if we have to force ordering for write combining */
575 int ipath_unordered_wc(void);
577 void ipath_disarm_piobufs(struct ipath_devdata *, unsigned first,
580 int ipath_create_rcvhdrq(struct ipath_devdata *, struct ipath_portdata *);
581 void ipath_free_pddata(struct ipath_devdata *, struct ipath_portdata *);
583 int ipath_parse_ushort(const char *str, unsigned short *valp);
585 int ipath_wait_linkstate(struct ipath_devdata *, u32, int);
586 void ipath_set_ib_lstate(struct ipath_devdata *, int);
587 void ipath_kreceive(struct ipath_devdata *);
588 int ipath_setrcvhdrsize(struct ipath_devdata *, unsigned);
589 int ipath_reset_device(int);
590 void ipath_get_faststats(unsigned long);
592 /* for use in system calls, where we want to know device type, etc. */
593 #define port_fp(fp) ((struct ipath_portdata *) (fp)->private_data)
596 * values for ipath_flags
598 /* The chip is up and initted */
599 #define IPATH_INITTED 0x2
600 /* set if any user code has set kr_rcvhdrsize */
601 #define IPATH_RCVHDRSZ_SET 0x4
602 /* The chip is present and valid for accesses */
603 #define IPATH_PRESENT 0x8
604 /* HT link0 is only 8 bits wide, ignore upper byte crc
606 #define IPATH_8BIT_IN_HT0 0x10
607 /* HT link1 is only 8 bits wide, ignore upper byte crc
609 #define IPATH_8BIT_IN_HT1 0x20
610 /* The link is down */
611 #define IPATH_LINKDOWN 0x40
612 /* The link level is up (0x11) */
613 #define IPATH_LINKINIT 0x80
614 /* The link is in the armed (0x21) state */
615 #define IPATH_LINKARMED 0x100
616 /* The link is in the active (0x31) state */
617 #define IPATH_LINKACTIVE 0x200
618 /* link current state is unknown */
619 #define IPATH_LINKUNK 0x400
620 /* no IB cable, or no device on IB cable */
621 #define IPATH_NOCABLE 0x4000
622 /* Supports port zero per packet receive interrupts via
624 #define IPATH_GPIO_INTR 0x8000
625 /* uses the coded 4byte TID, not 8 byte */
626 #define IPATH_4BYTE_TID 0x10000
627 /* packet/word counters are 32 bit, else those 4 counters
629 #define IPATH_32BITCOUNTERS 0x20000
630 /* can miss port0 rx interrupts */
631 #define IPATH_POLL_RX_INTR 0x40000
632 #define IPATH_DISABLED 0x80000 /* administratively disabled */
634 /* portdata flag bit offsets */
635 /* waiting for a packet to arrive */
636 #define IPATH_PORT_WAITING_RCV 2
637 /* waiting for a PIO buffer to be available */
638 #define IPATH_PORT_WAITING_PIO 3
640 /* free up any allocated data at closes */
641 void ipath_free_data(struct ipath_portdata *dd);
642 int ipath_waitfor_mdio_cmdready(struct ipath_devdata *);
643 int ipath_waitfor_complete(struct ipath_devdata *, ipath_kreg, u64, u64 *);
644 u32 __iomem *ipath_getpiobuf(struct ipath_devdata *, u32 *);
645 /* init PE-800-specific func */
646 void ipath_init_pe800_funcs(struct ipath_devdata *);
647 /* init HT-400-specific func */
648 void ipath_init_ht400_funcs(struct ipath_devdata *);
649 void ipath_get_eeprom_info(struct ipath_devdata *);
650 u64 ipath_snap_cntr(struct ipath_devdata *, ipath_creg);
653 * number of words used for protocol header if not set by ipath_userinit();
655 #define IPATH_DFLT_RCVHDRSIZE 9
657 #define IPATH_MDIO_CMD_WRITE 1
658 #define IPATH_MDIO_CMD_READ 2
659 #define IPATH_MDIO_CLD_DIV 25 /* to get 2.5 Mhz mdio clock */
660 #define IPATH_MDIO_CMDVALID 0x40000000 /* bit 30 */
661 #define IPATH_MDIO_DATAVALID 0x80000000 /* bit 31 */
662 #define IPATH_MDIO_CTRL_STD 0x0
664 static inline u64 ipath_mdio_req(int cmd, int dev, int reg, int data)
666 return (((u64) IPATH_MDIO_CLD_DIV) << 32) |
673 /* signal and fifo status, in bank 31 */
674 #define IPATH_MDIO_CTRL_XGXS_REG_8 0x8
675 /* controls loopback, redundancy */
676 #define IPATH_MDIO_CTRL_8355_REG_1 0x10
677 /* premph, encdec, etc. */
678 #define IPATH_MDIO_CTRL_8355_REG_2 0x11
680 #define IPATH_MDIO_CTRL_8355_REG_6 0x15
681 #define IPATH_MDIO_CTRL_8355_REG_9 0x18
682 #define IPATH_MDIO_CTRL_8355_REG_10 0x1D
684 int ipath_get_user_pages(unsigned long, size_t, struct page **);
685 int ipath_get_user_pages_nocopy(unsigned long, struct page **);
686 void ipath_release_user_pages(struct page **, size_t);
687 void ipath_release_user_pages_on_close(struct page **, size_t);
688 int ipath_eeprom_read(struct ipath_devdata *, u8, void *, int);
689 int ipath_eeprom_write(struct ipath_devdata *, u8, const void *, int);
691 /* these are used for the registers that vary with port */
692 void ipath_write_kreg_port(const struct ipath_devdata *, ipath_kreg,
694 u64 ipath_read_kreg64_port(const struct ipath_devdata *, ipath_kreg,
698 * We could have a single register get/put routine, that takes a group type,
699 * but this is somewhat clearer and cleaner. It also gives us some error
700 * checking. 64 bit register reads should always work, but are inefficient
701 * on opteron (the northbridge always generates 2 separate HT 32 bit reads),
702 * so we use kreg32 wherever possible. User register and counter register
703 * reads are always 32 bit reads, so only one form of those routines.
707 * At the moment, none of the s-registers are writable, so no
708 * ipath_write_sreg(), and none of the c-registers are writable, so no
709 * ipath_write_creg().
713 * ipath_read_ureg32 - read 32-bit virtualized per-port register
715 * @regno: register number
718 * Return the contents of a register that is virtualized to be per port.
719 * Returns -1 on errors (not distinguishable from valid contents at
720 * runtime; we may add a separate error variable at some point).
722 static inline u32 ipath_read_ureg32(const struct ipath_devdata *dd,
723 ipath_ureg regno, int port)
725 if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
728 return readl(regno + (u64 __iomem *)
729 (dd->ipath_uregbase +
730 (char __iomem *)dd->ipath_kregbase +
731 dd->ipath_palign * port));
735 * ipath_write_ureg - write 32-bit virtualized per-port register
737 * @regno: register number
741 * Write the contents of a register that is virtualized to be per port.
743 static inline void ipath_write_ureg(const struct ipath_devdata *dd,
744 ipath_ureg regno, u64 value, int port)
746 u64 __iomem *ubase = (u64 __iomem *)
747 (dd->ipath_uregbase + (char __iomem *) dd->ipath_kregbase +
748 dd->ipath_palign * port);
749 if (dd->ipath_kregbase)
750 writeq(value, &ubase[regno]);
753 static inline u32 ipath_read_kreg32(const struct ipath_devdata *dd,
756 if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
758 return readl((u32 __iomem *) & dd->ipath_kregbase[regno]);
761 static inline u64 ipath_read_kreg64(const struct ipath_devdata *dd,
764 if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
767 return readq(&dd->ipath_kregbase[regno]);
770 static inline void ipath_write_kreg(const struct ipath_devdata *dd,
771 ipath_kreg regno, u64 value)
773 if (dd->ipath_kregbase)
774 writeq(value, &dd->ipath_kregbase[regno]);
777 static inline u64 ipath_read_creg(const struct ipath_devdata *dd,
780 if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
783 return readq(regno + (u64 __iomem *)
784 (dd->ipath_cregbase +
785 (char __iomem *)dd->ipath_kregbase));
788 static inline u32 ipath_read_creg32(const struct ipath_devdata *dd,
791 if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
793 return readl(regno + (u64 __iomem *)
794 (dd->ipath_cregbase +
795 (char __iomem *)dd->ipath_kregbase));
802 struct device_driver;
804 extern const char ipath_core_version[];
806 int ipath_driver_create_group(struct device_driver *);
807 void ipath_driver_remove_group(struct device_driver *);
809 int ipath_device_create_group(struct device *, struct ipath_devdata *);
810 void ipath_device_remove_group(struct device *, struct ipath_devdata *);
811 int ipath_expose_reset(struct device *);
813 int ipath_init_ipathfs(void);
814 void ipath_exit_ipathfs(void);
815 int ipathfs_add_device(struct ipath_devdata *);
816 int ipathfs_remove_device(struct ipath_devdata *);
819 * Flush write combining store buffers (if present) and perform a write
822 #if defined(CONFIG_X86_64)
823 #define ipath_flush_wc() asm volatile("sfence" ::: "memory")
825 #define ipath_flush_wc() wmb()
828 extern unsigned ipath_debug; /* debugging bit mask */
830 const char *ipath_get_unit_name(int unit);
832 extern struct mutex ipath_mutex;
834 #define IPATH_DRV_NAME "ipath_core"
835 #define IPATH_MAJOR 233
836 #define IPATH_USER_MINOR_BASE 0
837 #define IPATH_SMA_MINOR 128
838 #define IPATH_DIAG_MINOR_BASE 129
839 #define IPATH_NMINORS 255
841 #define ipath_dev_err(dd,fmt,...) \
843 const struct ipath_devdata *__dd = (dd); \
845 dev_err(&__dd->pcidev->dev, "%s: " fmt, \
846 ipath_get_unit_name(__dd->ipath_unit), \
849 printk(KERN_ERR IPATH_DRV_NAME ": %s: " fmt, \
850 ipath_get_unit_name(__dd->ipath_unit), \
856 # define __IPATH_DBG_WHICH(which,fmt,...) \
858 if(unlikely(ipath_debug&(which))) \
859 printk(KERN_DEBUG IPATH_DRV_NAME ": %s: " fmt, \
860 __func__,##__VA_ARGS__); \
863 # define ipath_dbg(fmt,...) \
864 __IPATH_DBG_WHICH(__IPATH_DBG,fmt,##__VA_ARGS__)
865 # define ipath_cdbg(which,fmt,...) \
866 __IPATH_DBG_WHICH(__IPATH_##which##DBG,fmt,##__VA_ARGS__)
868 #else /* ! _IPATH_DEBUGGING */
870 # define ipath_dbg(fmt,...)
871 # define ipath_cdbg(which,fmt,...)
873 #endif /* _IPATH_DEBUGGING */
875 #endif /* _IPATH_KERNEL_H */