2 * Copyright (c) 2006 QLogic, Inc. All rights reserved.
3 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/spinlock.h>
35 #include <linux/idr.h>
36 #include <linux/pci.h>
37 #include <linux/delay.h>
38 #include <linux/netdevice.h>
39 #include <linux/vmalloc.h>
41 #include "ipath_kernel.h"
42 #include "ips_common.h"
43 #include "ipath_layer.h"
45 static void ipath_update_pio_bufs(struct ipath_devdata
*);
47 const char *ipath_get_unit_name(int unit
)
49 static char iname
[16];
50 snprintf(iname
, sizeof iname
, "infinipath%u", unit
);
54 EXPORT_SYMBOL_GPL(ipath_get_unit_name
);
56 #define DRIVER_LOAD_MSG "QLogic " IPATH_DRV_NAME " loaded: "
57 #define PFX IPATH_DRV_NAME ": "
60 * The size has to be longer than this string, so we can append
61 * board/chip information to it in the init code.
63 const char ipath_core_version
[] = IPATH_IDSTR
"\n";
65 static struct idr unit_table
;
66 DEFINE_SPINLOCK(ipath_devs_lock
);
67 LIST_HEAD(ipath_dev_list
);
69 wait_queue_head_t ipath_sma_state_wait
;
71 unsigned ipath_debug
= __IPATH_INFO
;
73 module_param_named(debug
, ipath_debug
, uint
, S_IWUSR
| S_IRUGO
);
74 MODULE_PARM_DESC(debug
, "mask for debug prints");
75 EXPORT_SYMBOL_GPL(ipath_debug
);
77 MODULE_LICENSE("GPL");
78 MODULE_AUTHOR("QLogic <support@pathscale.com>");
79 MODULE_DESCRIPTION("QLogic InfiniPath driver");
81 const char *ipath_ibcstatus_str
[] = {
88 "LState6", /* unused */
89 "LState7", /* unused */
95 "LState0xD", /* unused */
101 * These variables are initialized in the chip-specific files
102 * but are defined here.
104 u16 ipath_gpio_sda_num
, ipath_gpio_scl_num
;
105 u64 ipath_gpio_sda
, ipath_gpio_scl
;
106 u64 infinipath_i_bitsextant
;
107 ipath_err_t infinipath_e_bitsextant
, infinipath_hwe_bitsextant
;
108 u32 infinipath_i_rcvavail_mask
, infinipath_i_rcvurg_mask
;
110 static void __devexit
ipath_remove_one(struct pci_dev
*);
111 static int __devinit
ipath_init_one(struct pci_dev
*,
112 const struct pci_device_id
*);
114 /* Only needed for registration, nothing else needs this info */
115 #define PCI_VENDOR_ID_PATHSCALE 0x1fc1
116 #define PCI_DEVICE_ID_INFINIPATH_HT 0xd
117 #define PCI_DEVICE_ID_INFINIPATH_PE800 0x10
119 static const struct pci_device_id ipath_pci_tbl
[] = {
120 { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE
, PCI_DEVICE_ID_INFINIPATH_HT
) },
121 { PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE
, PCI_DEVICE_ID_INFINIPATH_PE800
) },
125 MODULE_DEVICE_TABLE(pci
, ipath_pci_tbl
);
127 static struct pci_driver ipath_driver
= {
128 .name
= IPATH_DRV_NAME
,
129 .probe
= ipath_init_one
,
130 .remove
= __devexit_p(ipath_remove_one
),
131 .id_table
= ipath_pci_tbl
,
135 static inline void read_bars(struct ipath_devdata
*dd
, struct pci_dev
*dev
,
136 u32
*bar0
, u32
*bar1
)
140 ret
= pci_read_config_dword(dev
, PCI_BASE_ADDRESS_0
, bar0
);
142 ipath_dev_err(dd
, "failed to read bar0 before enable: "
145 ret
= pci_read_config_dword(dev
, PCI_BASE_ADDRESS_1
, bar1
);
147 ipath_dev_err(dd
, "failed to read bar1 before enable: "
150 ipath_dbg("Read bar0 %x bar1 %x\n", *bar0
, *bar1
);
153 static void ipath_free_devdata(struct pci_dev
*pdev
,
154 struct ipath_devdata
*dd
)
158 pci_set_drvdata(pdev
, NULL
);
160 if (dd
->ipath_unit
!= -1) {
161 spin_lock_irqsave(&ipath_devs_lock
, flags
);
162 idr_remove(&unit_table
, dd
->ipath_unit
);
163 list_del(&dd
->ipath_list
);
164 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
169 static struct ipath_devdata
*ipath_alloc_devdata(struct pci_dev
*pdev
)
172 struct ipath_devdata
*dd
;
175 if (!idr_pre_get(&unit_table
, GFP_KERNEL
)) {
176 dd
= ERR_PTR(-ENOMEM
);
180 dd
= vmalloc(sizeof(*dd
));
182 dd
= ERR_PTR(-ENOMEM
);
185 memset(dd
, 0, sizeof(*dd
));
188 spin_lock_irqsave(&ipath_devs_lock
, flags
);
190 ret
= idr_get_new(&unit_table
, dd
, &dd
->ipath_unit
);
192 printk(KERN_ERR IPATH_DRV_NAME
193 ": Could not allocate unit ID: error %d\n", -ret
);
194 ipath_free_devdata(pdev
, dd
);
200 pci_set_drvdata(pdev
, dd
);
202 list_add(&dd
->ipath_list
, &ipath_dev_list
);
205 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
211 static inline struct ipath_devdata
*__ipath_lookup(int unit
)
213 return idr_find(&unit_table
, unit
);
216 struct ipath_devdata
*ipath_lookup(int unit
)
218 struct ipath_devdata
*dd
;
221 spin_lock_irqsave(&ipath_devs_lock
, flags
);
222 dd
= __ipath_lookup(unit
);
223 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
228 int ipath_count_units(int *npresentp
, int *nupp
, u32
*maxportsp
)
230 int nunits
, npresent
, nup
;
231 struct ipath_devdata
*dd
;
235 nunits
= npresent
= nup
= maxports
= 0;
237 spin_lock_irqsave(&ipath_devs_lock
, flags
);
239 list_for_each_entry(dd
, &ipath_dev_list
, ipath_list
) {
241 if ((dd
->ipath_flags
& IPATH_PRESENT
) && dd
->ipath_kregbase
)
244 !(dd
->ipath_flags
& (IPATH_DISABLED
| IPATH_LINKDOWN
247 if (dd
->ipath_cfgports
> maxports
)
248 maxports
= dd
->ipath_cfgports
;
251 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
254 *npresentp
= npresent
;
258 *maxportsp
= maxports
;
264 * These next two routines are placeholders in case we don't have per-arch
265 * code for controlling write combining. If explicit control of write
266 * combining is not available, performance will probably be awful.
269 int __attribute__((weak
)) ipath_enable_wc(struct ipath_devdata
*dd
)
274 void __attribute__((weak
)) ipath_disable_wc(struct ipath_devdata
*dd
)
278 static int __devinit
ipath_init_one(struct pci_dev
*pdev
,
279 const struct pci_device_id
*ent
)
282 struct ipath_devdata
*dd
;
283 unsigned long long addr
;
284 u32 bar0
= 0, bar1
= 0;
287 dd
= ipath_alloc_devdata(pdev
);
290 printk(KERN_ERR IPATH_DRV_NAME
291 ": Could not allocate devdata: error %d\n", -ret
);
295 ipath_cdbg(VERBOSE
, "initializing unit #%u\n", dd
->ipath_unit
);
297 read_bars(dd
, pdev
, &bar0
, &bar1
);
299 ret
= pci_enable_device(pdev
);
301 /* This can happen iff:
303 * We did a chip reset, and then failed to reprogram the
304 * BAR, or the chip reset due to an internal error. We then
305 * unloaded the driver and reloaded it.
307 * Both reset cases set the BAR back to initial state. For
308 * the latter case, the AER sticky error bit at offset 0x718
309 * should be set, but the Linux kernel doesn't yet know
310 * about that, it appears. If the original BAR was retained
311 * in the kernel data structures, this may be OK.
313 ipath_dev_err(dd
, "enable unit %d failed: error %d\n",
314 dd
->ipath_unit
, -ret
);
317 addr
= pci_resource_start(pdev
, 0);
318 len
= pci_resource_len(pdev
, 0);
319 ipath_cdbg(VERBOSE
, "regbase (0) %llx len %d irq %x, vend %x/%x "
320 "driver_data %lx\n", addr
, len
, pdev
->irq
, ent
->vendor
,
321 ent
->device
, ent
->driver_data
);
323 read_bars(dd
, pdev
, &bar0
, &bar1
);
325 if (!bar1
&& !(bar0
& ~0xf)) {
327 dev_info(&pdev
->dev
, "BAR is 0 (probable RESET), "
328 "rewriting as %llx\n", addr
);
329 ret
= pci_write_config_dword(
330 pdev
, PCI_BASE_ADDRESS_0
, addr
);
332 ipath_dev_err(dd
, "rewrite of BAR0 "
333 "failed: err %d\n", -ret
);
336 ret
= pci_write_config_dword(
337 pdev
, PCI_BASE_ADDRESS_1
, addr
>> 32);
339 ipath_dev_err(dd
, "rewrite of BAR1 "
340 "failed: err %d\n", -ret
);
344 ipath_dev_err(dd
, "BAR is 0 (probable RESET), "
345 "not usable until reboot\n");
351 ret
= pci_request_regions(pdev
, IPATH_DRV_NAME
);
353 dev_info(&pdev
->dev
, "pci_request_regions unit %u fails: "
354 "err %d\n", dd
->ipath_unit
, -ret
);
358 ret
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
);
361 * if the 64 bit setup fails, try 32 bit. Some systems
362 * do not setup 64 bit maps on systems with 2GB or less
365 ret
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
);
368 "Unable to set DMA mask for unit %u: %d\n",
369 dd
->ipath_unit
, ret
);
373 ipath_dbg("No 64bit DMA mask, used 32 bit mask\n");
374 ret
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
);
377 "Unable to set DMA consistent mask "
379 dd
->ipath_unit
, ret
);
384 ret
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
);
387 "Unable to set DMA consistent mask "
389 dd
->ipath_unit
, ret
);
392 pci_set_master(pdev
);
395 * Save BARs to rewrite after device reset. Save all 64 bits of
398 dd
->ipath_pcibar0
= addr
;
399 dd
->ipath_pcibar1
= addr
>> 32;
400 dd
->ipath_deviceid
= ent
->device
; /* save for later use */
401 dd
->ipath_vendorid
= ent
->vendor
;
403 /* setup the chip-specific functions, as early as possible. */
404 switch (ent
->device
) {
405 case PCI_DEVICE_ID_INFINIPATH_HT
:
406 ipath_init_ht400_funcs(dd
);
408 case PCI_DEVICE_ID_INFINIPATH_PE800
:
409 ipath_init_pe800_funcs(dd
);
412 ipath_dev_err(dd
, "Found unknown QLogic deviceid 0x%x, "
413 "failing\n", ent
->device
);
417 for (j
= 0; j
< 6; j
++) {
418 if (!pdev
->resource
[j
].start
)
420 ipath_cdbg(VERBOSE
, "BAR %d start %llx, end %llx, len %llx\n",
421 j
, (unsigned long long)pdev
->resource
[j
].start
,
422 (unsigned long long)pdev
->resource
[j
].end
,
423 (unsigned long long)pci_resource_len(pdev
, j
));
427 ipath_dev_err(dd
, "No valid address in BAR 0!\n");
432 dd
->ipath_deviceid
= ent
->device
; /* save for later use */
433 dd
->ipath_vendorid
= ent
->vendor
;
435 ret
= pci_read_config_byte(pdev
, PCI_REVISION_ID
, &rev
);
437 ipath_dev_err(dd
, "Failed to read PCI revision ID unit "
438 "%u: err %d\n", dd
->ipath_unit
, -ret
);
439 goto bail_regions
; /* shouldn't ever happen */
441 dd
->ipath_pcirev
= rev
;
443 dd
->ipath_kregbase
= ioremap_nocache(addr
, len
);
445 if (!dd
->ipath_kregbase
) {
446 ipath_dbg("Unable to map io addr %llx to kvirt, failing\n",
451 dd
->ipath_kregend
= (u64 __iomem
*)
452 ((void __iomem
*)dd
->ipath_kregbase
+ len
);
453 dd
->ipath_physaddr
= addr
; /* used for io_remap, etc. */
455 ipath_cdbg(VERBOSE
, "mapped io addr %llx to kregbase %p\n",
456 addr
, dd
->ipath_kregbase
);
459 * clear ipath_flags here instead of in ipath_init_chip as it is set
460 * by ipath_setup_htconfig.
464 if (dd
->ipath_f_bus(dd
, pdev
))
465 ipath_dev_err(dd
, "Failed to setup config space; "
466 "continuing anyway\n");
469 * set up our interrupt handler; SA_SHIRQ probably not needed,
470 * since MSI interrupts shouldn't be shared but won't hurt for now.
471 * check 0 irq after we return from chip-specific bus setup, since
472 * that can affect this due to setup
475 ipath_dev_err(dd
, "irq is 0, BIOS error? Interrupts won't "
478 ret
= request_irq(pdev
->irq
, ipath_intr
, SA_SHIRQ
,
481 ipath_dev_err(dd
, "Couldn't setup irq handler, "
482 "irq=%u: %d\n", pdev
->irq
, ret
);
487 ret
= ipath_init_chip(dd
, 0); /* do the chip-specific init */
491 ret
= ipath_enable_wc(dd
);
494 ipath_dev_err(dd
, "Write combining not enabled "
495 "(err %d): performance may be poor\n",
500 ipath_device_create_group(&pdev
->dev
, dd
);
501 ipathfs_add_device(dd
);
509 iounmap((volatile void __iomem
*) dd
->ipath_kregbase
);
512 pci_release_regions(pdev
);
515 pci_disable_device(pdev
);
518 ipath_free_devdata(pdev
, dd
);
524 static void __devexit
ipath_remove_one(struct pci_dev
*pdev
)
526 struct ipath_devdata
*dd
;
528 ipath_cdbg(VERBOSE
, "removing, pdev=%p\n", pdev
);
532 dd
= pci_get_drvdata(pdev
);
533 ipath_layer_remove(dd
);
534 ipath_diag_remove(dd
);
535 ipath_user_remove(dd
);
536 ipathfs_remove_device(dd
);
537 ipath_device_remove_group(&pdev
->dev
, dd
);
538 ipath_cdbg(VERBOSE
, "Releasing pci memory regions, dd %p, "
539 "unit %u\n", dd
, (u32
) dd
->ipath_unit
);
540 if (dd
->ipath_kregbase
) {
541 ipath_cdbg(VERBOSE
, "Unmapping kregbase %p\n",
543 iounmap((volatile void __iomem
*) dd
->ipath_kregbase
);
544 dd
->ipath_kregbase
= NULL
;
546 pci_release_regions(pdev
);
547 ipath_cdbg(VERBOSE
, "calling pci_disable_device\n");
548 pci_disable_device(pdev
);
550 ipath_free_devdata(pdev
, dd
);
553 /* general driver use */
554 DEFINE_MUTEX(ipath_mutex
);
556 static DEFINE_SPINLOCK(ipath_pioavail_lock
);
559 * ipath_disarm_piobufs - cancel a range of PIO buffers
560 * @dd: the infinipath device
561 * @first: the first PIO buffer to cancel
562 * @cnt: the number of PIO buffers to cancel
564 * cancel a range of PIO buffers, used when they might be armed, but
565 * not triggered. Used at init to ensure buffer state, and also user
566 * process close, in case it died while writing to a PIO buffer
569 void ipath_disarm_piobufs(struct ipath_devdata
*dd
, unsigned first
,
572 unsigned i
, last
= first
+ cnt
;
573 u64 sendctrl
, sendorig
;
575 ipath_cdbg(PKT
, "disarm %u PIObufs first=%u\n", cnt
, first
);
576 sendorig
= dd
->ipath_sendctrl
| INFINIPATH_S_DISARM
;
577 for (i
= first
; i
< last
; i
++) {
578 sendctrl
= sendorig
|
579 (i
<< INFINIPATH_S_DISARMPIOBUF_SHIFT
);
580 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
585 * Write it again with current value, in case ipath_sendctrl changed
586 * while we were looping; no critical bits that would require
589 * Write a 0, and then the original value, reading scratch in
590 * between. This seems to avoid a chip timing race that causes
591 * pioavail updates to memory to stop.
593 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
595 sendorig
= ipath_read_kreg64(dd
, dd
->ipath_kregs
->kr_scratch
);
596 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
601 * ipath_wait_linkstate - wait for an IB link state change to occur
602 * @dd: the infinipath device
603 * @state: the state to wait for
604 * @msecs: the number of milliseconds to wait
606 * wait up to msecs milliseconds for IB link state change to occur for
607 * now, take the easy polling route. Currently used only by
608 * ipath_layer_set_linkstate. Returns 0 if state reached, otherwise
609 * -ETIMEDOUT state can have multiple states set, for any of several
612 int ipath_wait_linkstate(struct ipath_devdata
*dd
, u32 state
, int msecs
)
614 dd
->ipath_sma_state_wanted
= state
;
615 wait_event_interruptible_timeout(ipath_sma_state_wait
,
616 (dd
->ipath_flags
& state
),
617 msecs_to_jiffies(msecs
));
618 dd
->ipath_sma_state_wanted
= 0;
620 if (!(dd
->ipath_flags
& state
)) {
622 ipath_cdbg(SMA
, "Didn't reach linkstate %s within %u ms\n",
623 /* test INIT ahead of DOWN, both can be set */
624 (state
& IPATH_LINKINIT
) ? "INIT" :
625 ((state
& IPATH_LINKDOWN
) ? "DOWN" :
626 ((state
& IPATH_LINKARMED
) ? "ARM" : "ACTIVE")),
628 val
= ipath_read_kreg64(dd
, dd
->ipath_kregs
->kr_ibcstatus
);
629 ipath_cdbg(VERBOSE
, "ibcc=%llx ibcstatus=%llx (%s)\n",
630 (unsigned long long) ipath_read_kreg64(
631 dd
, dd
->ipath_kregs
->kr_ibcctrl
),
632 (unsigned long long) val
,
633 ipath_ibcstatus_str
[val
& 0xf]);
635 return (dd
->ipath_flags
& state
) ? 0 : -ETIMEDOUT
;
638 void ipath_decode_err(char *buf
, size_t blen
, ipath_err_t err
)
641 if (err
& INFINIPATH_E_RHDRLEN
)
642 strlcat(buf
, "rhdrlen ", blen
);
643 if (err
& INFINIPATH_E_RBADTID
)
644 strlcat(buf
, "rbadtid ", blen
);
645 if (err
& INFINIPATH_E_RBADVERSION
)
646 strlcat(buf
, "rbadversion ", blen
);
647 if (err
& INFINIPATH_E_RHDR
)
648 strlcat(buf
, "rhdr ", blen
);
649 if (err
& INFINIPATH_E_RLONGPKTLEN
)
650 strlcat(buf
, "rlongpktlen ", blen
);
651 if (err
& INFINIPATH_E_RSHORTPKTLEN
)
652 strlcat(buf
, "rshortpktlen ", blen
);
653 if (err
& INFINIPATH_E_RMAXPKTLEN
)
654 strlcat(buf
, "rmaxpktlen ", blen
);
655 if (err
& INFINIPATH_E_RMINPKTLEN
)
656 strlcat(buf
, "rminpktlen ", blen
);
657 if (err
& INFINIPATH_E_RFORMATERR
)
658 strlcat(buf
, "rformaterr ", blen
);
659 if (err
& INFINIPATH_E_RUNSUPVL
)
660 strlcat(buf
, "runsupvl ", blen
);
661 if (err
& INFINIPATH_E_RUNEXPCHAR
)
662 strlcat(buf
, "runexpchar ", blen
);
663 if (err
& INFINIPATH_E_RIBFLOW
)
664 strlcat(buf
, "ribflow ", blen
);
665 if (err
& INFINIPATH_E_REBP
)
666 strlcat(buf
, "EBP ", blen
);
667 if (err
& INFINIPATH_E_SUNDERRUN
)
668 strlcat(buf
, "sunderrun ", blen
);
669 if (err
& INFINIPATH_E_SPIOARMLAUNCH
)
670 strlcat(buf
, "spioarmlaunch ", blen
);
671 if (err
& INFINIPATH_E_SUNEXPERRPKTNUM
)
672 strlcat(buf
, "sunexperrpktnum ", blen
);
673 if (err
& INFINIPATH_E_SDROPPEDDATAPKT
)
674 strlcat(buf
, "sdroppeddatapkt ", blen
);
675 if (err
& INFINIPATH_E_SDROPPEDSMPPKT
)
676 strlcat(buf
, "sdroppedsmppkt ", blen
);
677 if (err
& INFINIPATH_E_SMAXPKTLEN
)
678 strlcat(buf
, "smaxpktlen ", blen
);
679 if (err
& INFINIPATH_E_SMINPKTLEN
)
680 strlcat(buf
, "sminpktlen ", blen
);
681 if (err
& INFINIPATH_E_SUNSUPVL
)
682 strlcat(buf
, "sunsupVL ", blen
);
683 if (err
& INFINIPATH_E_SPKTLEN
)
684 strlcat(buf
, "spktlen ", blen
);
685 if (err
& INFINIPATH_E_INVALIDADDR
)
686 strlcat(buf
, "invalidaddr ", blen
);
687 if (err
& INFINIPATH_E_RICRC
)
688 strlcat(buf
, "CRC ", blen
);
689 if (err
& INFINIPATH_E_RVCRC
)
690 strlcat(buf
, "VCRC ", blen
);
691 if (err
& INFINIPATH_E_RRCVEGRFULL
)
692 strlcat(buf
, "rcvegrfull ", blen
);
693 if (err
& INFINIPATH_E_RRCVHDRFULL
)
694 strlcat(buf
, "rcvhdrfull ", blen
);
695 if (err
& INFINIPATH_E_IBSTATUSCHANGED
)
696 strlcat(buf
, "ibcstatuschg ", blen
);
697 if (err
& INFINIPATH_E_RIBLOSTLINK
)
698 strlcat(buf
, "riblostlink ", blen
);
699 if (err
& INFINIPATH_E_HARDWARE
)
700 strlcat(buf
, "hardware ", blen
);
701 if (err
& INFINIPATH_E_RESET
)
702 strlcat(buf
, "reset ", blen
);
706 * get_rhf_errstring - decode RHF errors
707 * @err: the err number
708 * @msg: the output buffer
709 * @len: the length of the output buffer
711 * only used one place now, may want more later
713 static void get_rhf_errstring(u32 err
, char *msg
, size_t len
)
715 /* if no errors, and so don't need to check what's first */
718 if (err
& INFINIPATH_RHF_H_ICRCERR
)
719 strlcat(msg
, "icrcerr ", len
);
720 if (err
& INFINIPATH_RHF_H_VCRCERR
)
721 strlcat(msg
, "vcrcerr ", len
);
722 if (err
& INFINIPATH_RHF_H_PARITYERR
)
723 strlcat(msg
, "parityerr ", len
);
724 if (err
& INFINIPATH_RHF_H_LENERR
)
725 strlcat(msg
, "lenerr ", len
);
726 if (err
& INFINIPATH_RHF_H_MTUERR
)
727 strlcat(msg
, "mtuerr ", len
);
728 if (err
& INFINIPATH_RHF_H_IHDRERR
)
729 /* infinipath hdr checksum error */
730 strlcat(msg
, "ipathhdrerr ", len
);
731 if (err
& INFINIPATH_RHF_H_TIDERR
)
732 strlcat(msg
, "tiderr ", len
);
733 if (err
& INFINIPATH_RHF_H_MKERR
)
734 /* bad port, offset, etc. */
735 strlcat(msg
, "invalid ipathhdr ", len
);
736 if (err
& INFINIPATH_RHF_H_IBERR
)
737 strlcat(msg
, "iberr ", len
);
738 if (err
& INFINIPATH_RHF_L_SWA
)
739 strlcat(msg
, "swA ", len
);
740 if (err
& INFINIPATH_RHF_L_SWB
)
741 strlcat(msg
, "swB ", len
);
745 * ipath_get_egrbuf - get an eager buffer
746 * @dd: the infinipath device
747 * @bufnum: the eager buffer to get
750 * must only be called if ipath_pd[port] is known to be allocated
752 static inline void *ipath_get_egrbuf(struct ipath_devdata
*dd
, u32 bufnum
,
755 return dd
->ipath_port0_skbs
?
756 (void *)dd
->ipath_port0_skbs
[bufnum
]->data
: NULL
;
760 * ipath_alloc_skb - allocate an skb and buffer with possible constraints
761 * @dd: the infinipath device
762 * @gfp_mask: the sk_buff SFP mask
764 struct sk_buff
*ipath_alloc_skb(struct ipath_devdata
*dd
,
771 * Only fully supported way to handle this is to allocate lots
772 * extra, align as needed, and then do skb_reserve(). That wastes
773 * a lot of memory... I'll have to hack this into infinipath_copy
778 * We need 4 extra bytes for unaligned transfer copying
780 if (dd
->ipath_flags
& IPATH_4BYTE_TID
) {
781 /* we need a 4KB multiple alignment, and there is no way
782 * to do it except to allocate extra and then skb_reserve
783 * enough to bring it up to the right alignment.
785 len
= dd
->ipath_ibmaxlen
+ 4 + (1 << 11) - 1;
788 len
= dd
->ipath_ibmaxlen
+ 4;
789 skb
= __dev_alloc_skb(len
, gfp_mask
);
791 ipath_dev_err(dd
, "Failed to allocate skbuff, length %u\n",
795 if (dd
->ipath_flags
& IPATH_4BYTE_TID
) {
796 u32 una
= ((1 << 11) - 1) & (unsigned long)(skb
->data
+ 4);
798 skb_reserve(skb
, 4 + (1 << 11) - una
);
809 * ipath_rcv_layer - receive a packet for the layered (ethernet) driver
810 * @dd: the infinipath device
811 * @etail: the sk_buff number
812 * @tlen: the total packet length
813 * @hdr: the ethernet header
815 * Separate routine for better overall optimization
817 static void ipath_rcv_layer(struct ipath_devdata
*dd
, u32 etail
,
818 u32 tlen
, struct ether_header
*hdr
)
822 struct sk_buff
*skb
, *nskb
;
824 if (dd
->ipath_port0_skbs
&& hdr
->sub_opcode
== OPCODE_ENCAP
) {
826 * Allocate a new sk_buff to replace the one we give
827 * to the network stack.
829 nskb
= ipath_alloc_skb(dd
, GFP_ATOMIC
);
831 /* count OK packets that we drop */
832 ipath_stats
.sps_krdrops
++;
836 bthbytes
= (u8
*) hdr
->bth
;
837 pad
= (bthbytes
[1] >> 4) & 3;
839 elen
= tlen
- (sizeof(*hdr
) + pad
+ sizeof(u32
));
841 skb
= dd
->ipath_port0_skbs
[etail
];
842 dd
->ipath_port0_skbs
[etail
] = nskb
;
845 dd
->ipath_f_put_tid(dd
, etail
+ (u64 __iomem
*)
846 ((char __iomem
*) dd
->ipath_kregbase
847 + dd
->ipath_rcvegrbase
), 0,
848 virt_to_phys(nskb
->data
));
850 __ipath_layer_rcv(dd
, hdr
, skb
);
852 /* another ether packet received */
853 ipath_stats
.sps_ether_rpkts
++;
855 else if (hdr
->sub_opcode
== OPCODE_LID_ARP
)
856 __ipath_layer_rcv_lid(dd
, hdr
);
860 * ipath_kreceive - receive a packet
861 * @dd: the infinipath device
863 * called from interrupt handler for errors or receive interrupt
865 void ipath_kreceive(struct ipath_devdata
*dd
)
869 const u32 rsize
= dd
->ipath_rcvhdrentsize
; /* words */
870 const u32 maxcnt
= dd
->ipath_rcvhdrcnt
* rsize
; /* words */
871 u32 etail
= -1, l
, hdrqtail
;
872 struct ips_message_header
*hdr
;
873 u32 eflags
, i
, etype
, tlen
, pkttot
= 0, updegr
=0;
874 static u64 totcalls
; /* stats, may eventually remove */
877 if (!dd
->ipath_hdrqtailptr
) {
879 "hdrqtailptr not set, can't do receives\n");
883 /* There is already a thread processing this queue. */
884 if (test_and_set_bit(0, &dd
->ipath_rcv_pending
))
887 l
= dd
->ipath_port0head
;
888 if (l
== (u32
)le64_to_cpu(*dd
->ipath_hdrqtailptr
))
891 /* read only once at start for performance */
892 hdrqtail
= (u32
)le64_to_cpu(*dd
->ipath_hdrqtailptr
);
894 for (i
= 0; l
!= hdrqtail
; i
++) {
898 rc
= (u64
*) (dd
->ipath_pd
[0]->port_rcvhdrq
+ (l
<< 2));
899 hdr
= (struct ips_message_header
*)&rc
[1];
901 * could make a network order version of IPATH_KD_QP, and
902 * do the obvious shift before masking to speed this up.
904 qp
= ntohl(hdr
->bth
[1]) & 0xffffff;
905 bthbytes
= (u8
*) hdr
->bth
;
907 eflags
= ips_get_hdr_err_flags((__le32
*) rc
);
908 etype
= ips_get_rcv_type((__le32
*) rc
);
910 tlen
= ips_get_length_in_bytes((__le32
*) rc
);
912 if (etype
!= RCVHQ_RCV_TYPE_EXPECTED
) {
914 * it turns out that the chips uses an eager buffer
915 * for all non-expected packets, whether it "needs"
916 * one or not. So always get the index, but don't
917 * set ebuf (so we try to copy data) unless the
918 * length requires it.
920 etail
= ips_get_index((__le32
*) rc
);
921 if (tlen
> sizeof(*hdr
) ||
922 etype
== RCVHQ_RCV_TYPE_NON_KD
)
923 ebuf
= ipath_get_egrbuf(dd
, etail
, 0);
927 * both tiderr and ipathhdrerr are set for all plain IB
928 * packets; only ipathhdrerr should be set.
931 if (etype
!= RCVHQ_RCV_TYPE_NON_KD
&& etype
!=
932 RCVHQ_RCV_TYPE_ERROR
&& ips_get_ipath_ver(
933 hdr
->iph
.ver_port_tid_offset
) !=
935 ipath_cdbg(PKT
, "Bad InfiniPath protocol version "
939 if (eflags
& ~(INFINIPATH_RHF_H_TIDERR
|
940 INFINIPATH_RHF_H_IHDRERR
)) {
941 get_rhf_errstring(eflags
, emsg
, sizeof emsg
);
942 ipath_cdbg(PKT
, "RHFerrs %x hdrqtail=%x typ=%u "
943 "tlen=%x opcode=%x egridx=%x: %s\n",
944 eflags
, l
, etype
, tlen
, bthbytes
[0],
945 ips_get_index((__le32
*) rc
), emsg
);
946 } else if (etype
== RCVHQ_RCV_TYPE_NON_KD
) {
947 int ret
= __ipath_verbs_rcv(dd
, rc
+ 1,
951 "received IB packet, "
952 "not SMA (QP=%x)\n", qp
);
953 } else if (etype
== RCVHQ_RCV_TYPE_EAGER
) {
954 if (qp
== IPATH_KD_QP
&&
955 bthbytes
[0] == ipath_layer_rcv_opcode
&&
957 ipath_rcv_layer(dd
, etail
, tlen
,
958 (struct ether_header
*)hdr
);
960 ipath_cdbg(PKT
, "typ %x, opcode %x (eager, "
961 "qp=%x), len %x; ignored\n",
962 etype
, bthbytes
[0], qp
, tlen
);
964 else if (etype
== RCVHQ_RCV_TYPE_EXPECTED
)
965 ipath_dbg("Bug: Expected TID, opcode %x; ignored\n",
966 be32_to_cpu(hdr
->bth
[0]) & 0xff);
967 else if (eflags
& (INFINIPATH_RHF_H_TIDERR
|
968 INFINIPATH_RHF_H_IHDRERR
)) {
970 * This is a type 3 packet, only the LRH is in the
971 * rcvhdrq, the rest of the header is in the eager
976 bthbytes
= (u8
*) ebuf
;
981 get_rhf_errstring(eflags
, emsg
, sizeof emsg
);
982 ipath_dbg("Err %x (%s), opcode %x, egrbuf %x, "
983 "len %x\n", eflags
, emsg
, opcode
, etail
,
987 * error packet, type of error unknown.
988 * Probably type 3, but we don't know, so don't
989 * even try to print the opcode, etc.
991 ipath_dbg("Error Pkt, but no eflags! egrbuf %x, "
992 "len %x\nhdrq@%lx;hdrq+%x rhf: %llx; "
993 "hdr %llx %llx %llx %llx %llx\n",
994 etail
, tlen
, (unsigned long) rc
, l
,
995 (unsigned long long) rc
[0],
996 (unsigned long long) rc
[1],
997 (unsigned long long) rc
[2],
998 (unsigned long long) rc
[3],
999 (unsigned long long) rc
[4],
1000 (unsigned long long) rc
[5]);
1005 if (etype
!= RCVHQ_RCV_TYPE_EXPECTED
)
1008 * update head regs on last packet, and every 16 packets.
1009 * Reduce bus traffic, while still trying to prevent
1010 * rcvhdrq overflows, for when the queue is nearly full
1012 if (l
== hdrqtail
|| (i
&& !(i
&0xf))) {
1014 if (l
== hdrqtail
) /* want interrupt only on last */
1015 lval
= dd
->ipath_rhdrhead_intr_off
| l
;
1018 (void)ipath_write_ureg(dd
, ur_rcvhdrhead
, lval
, 0);
1020 (void)ipath_write_ureg(dd
, ur_rcvegrindexhead
,
1029 dd
->ipath_port0head
= l
;
1031 if (pkttot
> ipath_stats
.sps_maxpkts_call
)
1032 ipath_stats
.sps_maxpkts_call
= pkttot
;
1033 ipath_stats
.sps_port0pkts
+= pkttot
;
1034 ipath_stats
.sps_avgpkts_call
=
1035 ipath_stats
.sps_port0pkts
/ ++totcalls
;
1038 clear_bit(0, &dd
->ipath_rcv_pending
);
1039 smp_mb__after_clear_bit();
1045 * ipath_update_pio_bufs - update shadow copy of the PIO availability map
1046 * @dd: the infinipath device
1048 * called whenever our local copy indicates we have run out of send buffers
1049 * NOTE: This can be called from interrupt context by some code
1050 * and from non-interrupt context by ipath_getpiobuf().
1053 static void ipath_update_pio_bufs(struct ipath_devdata
*dd
)
1055 unsigned long flags
;
1057 const unsigned piobregs
= (unsigned)dd
->ipath_pioavregs
;
1059 /* If the generation (check) bits have changed, then we update the
1060 * busy bit for the corresponding PIO buffer. This algorithm will
1061 * modify positions to the value they already have in some cases
1062 * (i.e., no change), but it's faster than changing only the bits
1063 * that have changed.
1065 * We would like to do this atomicly, to avoid spinlocks in the
1066 * critical send path, but that's not really possible, given the
1067 * type of changes, and that this routine could be called on
1068 * multiple cpu's simultaneously, so we lock in this routine only,
1069 * to avoid conflicting updates; all we change is the shadow, and
1070 * it's a single 64 bit memory location, so by definition the update
1071 * is atomic in terms of what other cpu's can see in testing the
1072 * bits. The spin_lock overhead isn't too bad, since it only
1073 * happens when all buffers are in use, so only cpu overhead, not
1074 * latency or bandwidth is affected.
1076 #define _IPATH_ALL_CHECKBITS 0x5555555555555555ULL
1077 if (!dd
->ipath_pioavailregs_dma
) {
1078 ipath_dbg("Update shadow pioavail, but regs_dma NULL!\n");
1081 if (ipath_debug
& __IPATH_VERBDBG
) {
1082 /* only if packet debug and verbose */
1083 volatile __le64
*dma
= dd
->ipath_pioavailregs_dma
;
1084 unsigned long *shadow
= dd
->ipath_pioavailshadow
;
1086 ipath_cdbg(PKT
, "Refill avail, dma0=%llx shad0=%lx, "
1087 "d1=%llx s1=%lx, d2=%llx s2=%lx, d3=%llx "
1089 (unsigned long long) le64_to_cpu(dma
[0]),
1091 (unsigned long long) le64_to_cpu(dma
[1]),
1093 (unsigned long long) le64_to_cpu(dma
[2]),
1095 (unsigned long long) le64_to_cpu(dma
[3]),
1099 PKT
, "2nd group, dma4=%llx shad4=%lx, "
1100 "d5=%llx s5=%lx, d6=%llx s6=%lx, "
1102 (unsigned long long) le64_to_cpu(dma
[4]),
1104 (unsigned long long) le64_to_cpu(dma
[5]),
1106 (unsigned long long) le64_to_cpu(dma
[6]),
1108 (unsigned long long) le64_to_cpu(dma
[7]),
1111 spin_lock_irqsave(&ipath_pioavail_lock
, flags
);
1112 for (i
= 0; i
< piobregs
; i
++) {
1113 u64 pchbusy
, pchg
, piov
, pnew
;
1115 * Chip Errata: bug 6641; even and odd qwords>3 are swapped
1120 dd
->ipath_pioavailregs_dma
[i
- 1]);
1123 dd
->ipath_pioavailregs_dma
[i
+ 1]);
1125 piov
= le64_to_cpu(dd
->ipath_pioavailregs_dma
[i
]);
1126 pchg
= _IPATH_ALL_CHECKBITS
&
1127 ~(dd
->ipath_pioavailshadow
[i
] ^ piov
);
1128 pchbusy
= pchg
<< INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT
;
1129 if (pchg
&& (pchbusy
& dd
->ipath_pioavailshadow
[i
])) {
1130 pnew
= dd
->ipath_pioavailshadow
[i
] & ~pchbusy
;
1131 pnew
|= piov
& pchbusy
;
1132 dd
->ipath_pioavailshadow
[i
] = pnew
;
1135 spin_unlock_irqrestore(&ipath_pioavail_lock
, flags
);
1139 * ipath_setrcvhdrsize - set the receive header size
1140 * @dd: the infinipath device
1141 * @rhdrsize: the receive header size
1143 * called from user init code, and also layered driver init
1145 int ipath_setrcvhdrsize(struct ipath_devdata
*dd
, unsigned rhdrsize
)
1149 if (dd
->ipath_flags
& IPATH_RCVHDRSZ_SET
) {
1150 if (dd
->ipath_rcvhdrsize
!= rhdrsize
) {
1151 dev_info(&dd
->pcidev
->dev
,
1152 "Error: can't set protocol header "
1153 "size %u, already %u\n",
1154 rhdrsize
, dd
->ipath_rcvhdrsize
);
1157 ipath_cdbg(VERBOSE
, "Reuse same protocol header "
1158 "size %u\n", dd
->ipath_rcvhdrsize
);
1159 } else if (rhdrsize
> (dd
->ipath_rcvhdrentsize
-
1160 (sizeof(u64
) / sizeof(u32
)))) {
1161 ipath_dbg("Error: can't set protocol header size %u "
1162 "(> max %u)\n", rhdrsize
,
1163 dd
->ipath_rcvhdrentsize
-
1164 (u32
) (sizeof(u64
) / sizeof(u32
)));
1167 dd
->ipath_flags
|= IPATH_RCVHDRSZ_SET
;
1168 dd
->ipath_rcvhdrsize
= rhdrsize
;
1169 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_rcvhdrsize
,
1170 dd
->ipath_rcvhdrsize
);
1171 ipath_cdbg(VERBOSE
, "Set protocol header size to %u\n",
1172 dd
->ipath_rcvhdrsize
);
1178 * ipath_getpiobuf - find an available pio buffer
1179 * @dd: the infinipath device
1180 * @pbufnum: the buffer number is placed here
1182 * do appropriate marking as busy, etc.
1183 * returns buffer number if one found (>=0), negative number is error.
1184 * Used by ipath_sma_send_pkt and ipath_layer_send
1186 u32 __iomem
*ipath_getpiobuf(struct ipath_devdata
*dd
, u32
* pbufnum
)
1188 int i
, j
, starti
, updated
= 0;
1189 unsigned piobcnt
, iter
;
1190 unsigned long flags
;
1191 unsigned long *shadow
= dd
->ipath_pioavailshadow
;
1194 piobcnt
= (unsigned)(dd
->ipath_piobcnt2k
1195 + dd
->ipath_piobcnt4k
);
1196 starti
= dd
->ipath_lastport_piobuf
;
1197 iter
= piobcnt
- starti
;
1198 if (dd
->ipath_upd_pio_shadow
) {
1200 * Minor optimization. If we had no buffers on last call,
1201 * start out by doing the update; continue and do scan even
1202 * if no buffers were updated, to be paranoid
1204 ipath_update_pio_bufs(dd
);
1205 /* we scanned here, don't do it at end of scan */
1209 i
= dd
->ipath_lastpioindex
;
1213 * while test_and_set_bit() is atomic, we do that and then the
1214 * change_bit(), and the pair is not. See if this is the cause
1215 * of the remaining armlaunch errors.
1217 spin_lock_irqsave(&ipath_pioavail_lock
, flags
);
1218 for (j
= 0; j
< iter
; j
++, i
++) {
1222 * To avoid bus lock overhead, we first find a candidate
1223 * buffer, then do the test and set, and continue if that
1226 if (test_bit((2 * i
) + 1, shadow
) ||
1227 test_and_set_bit((2 * i
) + 1, shadow
))
1229 /* flip generation bit */
1230 change_bit(2 * i
, shadow
);
1233 spin_unlock_irqrestore(&ipath_pioavail_lock
, flags
);
1236 volatile __le64
*dma
= dd
->ipath_pioavailregs_dma
;
1239 * first time through; shadow exhausted, but may be real
1240 * buffers available, so go see; if any updated, rescan
1244 ipath_update_pio_bufs(dd
);
1249 dd
->ipath_upd_pio_shadow
= 1;
1251 * not atomic, but if we lose one once in a while, that's OK
1253 ipath_stats
.sps_nopiobufs
++;
1254 if (!(++dd
->ipath_consec_nopiobuf
% 100000)) {
1256 "%u pio sends with no bufavail; dmacopy: "
1257 "%llx %llx %llx %llx; shadow: "
1258 "%lx %lx %lx %lx\n",
1259 dd
->ipath_consec_nopiobuf
,
1260 (unsigned long long) le64_to_cpu(dma
[0]),
1261 (unsigned long long) le64_to_cpu(dma
[1]),
1262 (unsigned long long) le64_to_cpu(dma
[2]),
1263 (unsigned long long) le64_to_cpu(dma
[3]),
1264 shadow
[0], shadow
[1], shadow
[2],
1267 * 4 buffers per byte, 4 registers above, cover rest
1270 if ((dd
->ipath_piobcnt2k
+ dd
->ipath_piobcnt4k
) >
1271 (sizeof(shadow
[0]) * 4 * 4))
1272 ipath_dbg("2nd group: dmacopy: %llx %llx "
1273 "%llx %llx; shadow: %lx %lx "
1275 (unsigned long long)
1276 le64_to_cpu(dma
[4]),
1277 (unsigned long long)
1278 le64_to_cpu(dma
[5]),
1279 (unsigned long long)
1280 le64_to_cpu(dma
[6]),
1281 (unsigned long long)
1282 le64_to_cpu(dma
[7]),
1283 shadow
[4], shadow
[5],
1284 shadow
[6], shadow
[7]);
1292 * ran out of bufs, now some (at least this one we just
1293 * got) are now available, so tell the layered driver.
1295 __ipath_layer_intr(dd
, IPATH_LAYER_INT_SEND_CONTINUE
);
1298 * set next starting place. Since it's just an optimization,
1299 * it doesn't matter who wins on this, so no locking
1301 dd
->ipath_lastpioindex
= i
+ 1;
1302 if (dd
->ipath_upd_pio_shadow
)
1303 dd
->ipath_upd_pio_shadow
= 0;
1304 if (dd
->ipath_consec_nopiobuf
)
1305 dd
->ipath_consec_nopiobuf
= 0;
1306 if (i
< dd
->ipath_piobcnt2k
)
1307 buf
= (u32 __iomem
*) (dd
->ipath_pio2kbase
+
1308 i
* dd
->ipath_palign
);
1310 buf
= (u32 __iomem
*)
1311 (dd
->ipath_pio4kbase
+
1312 (i
- dd
->ipath_piobcnt2k
) * dd
->ipath_4kalign
);
1313 ipath_cdbg(VERBOSE
, "Return piobuf%u %uk @ %p\n",
1314 i
, (i
< dd
->ipath_piobcnt2k
) ? 2 : 4, buf
);
1323 * ipath_create_rcvhdrq - create a receive header queue
1324 * @dd: the infinipath device
1325 * @pd: the port data
1327 * this must be contiguous memory (from an i/o perspective), and must be
1328 * DMA'able (which means for some systems, it will go through an IOMMU,
1329 * or be forced into a low address range).
1331 int ipath_create_rcvhdrq(struct ipath_devdata
*dd
,
1332 struct ipath_portdata
*pd
)
1336 if (!pd
->port_rcvhdrq
) {
1337 dma_addr_t phys_hdrqtail
;
1338 gfp_t gfp_flags
= GFP_USER
| __GFP_COMP
;
1339 int amt
= ALIGN(dd
->ipath_rcvhdrcnt
* dd
->ipath_rcvhdrentsize
*
1340 sizeof(u32
), PAGE_SIZE
);
1342 pd
->port_rcvhdrq
= dma_alloc_coherent(
1343 &dd
->pcidev
->dev
, amt
, &pd
->port_rcvhdrq_phys
,
1346 if (!pd
->port_rcvhdrq
) {
1347 ipath_dev_err(dd
, "attempt to allocate %d bytes "
1348 "for port %u rcvhdrq failed\n",
1349 amt
, pd
->port_port
);
1353 pd
->port_rcvhdrtail_kvaddr
= dma_alloc_coherent(
1354 &dd
->pcidev
->dev
, PAGE_SIZE
, &phys_hdrqtail
, GFP_KERNEL
);
1355 if (!pd
->port_rcvhdrtail_kvaddr
) {
1356 ipath_dev_err(dd
, "attempt to allocate 1 page "
1357 "for port %u rcvhdrqtailaddr failed\n",
1362 pd
->port_rcvhdrqtailaddr_phys
= phys_hdrqtail
;
1364 pd
->port_rcvhdrq_size
= amt
;
1366 ipath_cdbg(VERBOSE
, "%d pages at %p (phys %lx) size=%lu "
1367 "for port %u rcvhdr Q\n",
1368 amt
>> PAGE_SHIFT
, pd
->port_rcvhdrq
,
1369 (unsigned long) pd
->port_rcvhdrq_phys
,
1370 (unsigned long) pd
->port_rcvhdrq_size
,
1373 ipath_cdbg(VERBOSE
, "port %d hdrtailaddr, %llx physical\n",
1375 (unsigned long long) phys_hdrqtail
);
1378 ipath_cdbg(VERBOSE
, "reuse port %d rcvhdrq @%p %llx phys; "
1379 "hdrtailaddr@%p %llx physical\n",
1380 pd
->port_port
, pd
->port_rcvhdrq
,
1381 pd
->port_rcvhdrq_phys
, pd
->port_rcvhdrtail_kvaddr
,
1382 (unsigned long long)pd
->port_rcvhdrqtailaddr_phys
);
1384 /* clear for security and sanity on each use */
1385 memset(pd
->port_rcvhdrq
, 0, pd
->port_rcvhdrq_size
);
1386 memset((void *)pd
->port_rcvhdrtail_kvaddr
, 0, PAGE_SIZE
);
1389 * tell chip each time we init it, even if we are re-using previous
1390 * memory (we zero the register at process close)
1392 ipath_write_kreg_port(dd
, dd
->ipath_kregs
->kr_rcvhdrtailaddr
,
1393 pd
->port_port
, pd
->port_rcvhdrqtailaddr_phys
);
1394 ipath_write_kreg_port(dd
, dd
->ipath_kregs
->kr_rcvhdraddr
,
1395 pd
->port_port
, pd
->port_rcvhdrq_phys
);
1402 int ipath_waitfor_complete(struct ipath_devdata
*dd
, ipath_kreg reg_id
,
1403 u64 bits_to_wait_for
, u64
* valp
)
1405 unsigned long timeout
;
1409 lastval
= ipath_read_kreg64(dd
, reg_id
);
1410 /* wait a ridiculously long time */
1411 timeout
= jiffies
+ msecs_to_jiffies(5);
1413 val
= ipath_read_kreg64(dd
, reg_id
);
1414 /* set so they have something, even on failures. */
1416 if ((val
& bits_to_wait_for
) == bits_to_wait_for
) {
1421 ipath_cdbg(VERBOSE
, "Changed from %llx to %llx, "
1422 "waiting for %llx bits\n",
1423 (unsigned long long) lastval
,
1424 (unsigned long long) val
,
1425 (unsigned long long) bits_to_wait_for
);
1427 if (time_after(jiffies
, timeout
)) {
1428 ipath_dbg("Didn't get bits %llx in register 0x%x, "
1430 (unsigned long long) bits_to_wait_for
,
1431 reg_id
, (unsigned long long) *valp
);
1441 * ipath_waitfor_mdio_cmdready - wait for last command to complete
1442 * @dd: the infinipath device
1444 * Like ipath_waitfor_complete(), but we wait for the CMDVALID bit to go
1445 * away indicating the last command has completed. It doesn't return data
1447 int ipath_waitfor_mdio_cmdready(struct ipath_devdata
*dd
)
1449 unsigned long timeout
;
1453 /* wait a ridiculously long time */
1454 timeout
= jiffies
+ msecs_to_jiffies(5);
1456 val
= ipath_read_kreg64(dd
, dd
->ipath_kregs
->kr_mdio
);
1457 if (!(val
& IPATH_MDIO_CMDVALID
)) {
1462 if (time_after(jiffies
, timeout
)) {
1463 ipath_dbg("CMDVALID stuck in mdio reg? (%llx)\n",
1464 (unsigned long long) val
);
1473 void ipath_set_ib_lstate(struct ipath_devdata
*dd
, int which
)
1475 static const char *what
[4] = {
1477 [INFINIPATH_IBCC_LINKCMD_INIT
] = "INIT",
1478 [INFINIPATH_IBCC_LINKCMD_ARMED
] = "ARMED",
1479 [INFINIPATH_IBCC_LINKCMD_ACTIVE
] = "ACTIVE"
1481 int linkcmd
= (which
>> INFINIPATH_IBCC_LINKCMD_SHIFT
) &
1482 INFINIPATH_IBCC_LINKCMD_MASK
;
1484 ipath_cdbg(SMA
, "Trying to move unit %u to %s, current ltstate "
1485 "is %s\n", dd
->ipath_unit
,
1487 ipath_ibcstatus_str
[
1489 (dd
, dd
->ipath_kregs
->kr_ibcstatus
) >>
1490 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT
) &
1491 INFINIPATH_IBCS_LINKTRAININGSTATE_MASK
]);
1492 /* flush all queued sends when going to DOWN or INIT, to be sure that
1493 * they don't block SMA and other MAD packets */
1494 if (!linkcmd
|| linkcmd
== INFINIPATH_IBCC_LINKCMD_INIT
) {
1495 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
1496 INFINIPATH_S_ABORT
);
1497 ipath_disarm_piobufs(dd
, dd
->ipath_lastport_piobuf
,
1498 (unsigned)(dd
->ipath_piobcnt2k
+
1499 dd
->ipath_piobcnt4k
) -
1500 dd
->ipath_lastport_piobuf
);
1503 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_ibcctrl
,
1504 dd
->ipath_ibcctrl
| which
);
1508 * ipath_read_kreg64_port - read a device's per-port 64-bit kernel register
1509 * @dd: the infinipath device
1510 * @regno: the register number to read
1511 * @port: the port containing the register
1513 * Registers that vary with the chip implementation constants (port)
1516 u64
ipath_read_kreg64_port(const struct ipath_devdata
*dd
, ipath_kreg regno
,
1521 if (port
< dd
->ipath_portcnt
&&
1522 (regno
== dd
->ipath_kregs
->kr_rcvhdraddr
||
1523 regno
== dd
->ipath_kregs
->kr_rcvhdrtailaddr
))
1524 where
= regno
+ port
;
1528 return ipath_read_kreg64(dd
, where
);
1532 * ipath_write_kreg_port - write a device's per-port 64-bit kernel register
1533 * @dd: the infinipath device
1534 * @regno: the register number to write
1535 * @port: the port containing the register
1536 * @value: the value to write
1538 * Registers that vary with the chip implementation constants (port)
1541 void ipath_write_kreg_port(const struct ipath_devdata
*dd
, ipath_kreg regno
,
1542 unsigned port
, u64 value
)
1546 if (port
< dd
->ipath_portcnt
&&
1547 (regno
== dd
->ipath_kregs
->kr_rcvhdraddr
||
1548 regno
== dd
->ipath_kregs
->kr_rcvhdrtailaddr
))
1549 where
= regno
+ port
;
1553 ipath_write_kreg(dd
, where
, value
);
1557 * ipath_shutdown_device - shut down a device
1558 * @dd: the infinipath device
1560 * This is called to make the device quiet when we are about to
1561 * unload the driver, and also when the device is administratively
1562 * disabled. It does not free any data structures.
1563 * Everything it does has to be setup again by ipath_init_chip(dd,1)
1565 void ipath_shutdown_device(struct ipath_devdata
*dd
)
1569 ipath_dbg("Shutting down the device\n");
1571 dd
->ipath_flags
|= IPATH_LINKUNK
;
1572 dd
->ipath_flags
&= ~(IPATH_INITTED
| IPATH_LINKDOWN
|
1573 IPATH_LINKINIT
| IPATH_LINKARMED
|
1575 *dd
->ipath_statusp
&= ~(IPATH_STATUS_IB_CONF
|
1576 IPATH_STATUS_IB_READY
);
1578 /* mask interrupts, but not errors */
1579 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_intmask
, 0ULL);
1581 dd
->ipath_rcvctrl
= 0;
1582 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_rcvctrl
,
1586 * gracefully stop all sends allowing any in progress to trickle out
1589 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
, 0ULL);
1591 val
= ipath_read_kreg64(dd
, dd
->ipath_kregs
->kr_scratch
);
1593 * enough for anything that's going to trickle out to have actually
1599 * abort any armed or launched PIO buffers that didn't go. (self
1600 * clearing). Will cause any packet currently being transmitted to
1601 * go out with an EBP, and may also cause a short packet error on
1604 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
1605 INFINIPATH_S_ABORT
);
1607 ipath_set_ib_lstate(dd
, INFINIPATH_IBCC_LINKINITCMD_DISABLE
<<
1608 INFINIPATH_IBCC_LINKINITCMD_SHIFT
);
1611 * we are shutting down, so tell the layered driver. We don't do
1612 * this on just a link state change, much like ethernet, a cable
1613 * unplug, etc. doesn't change driver state
1615 ipath_layer_intr(dd
, IPATH_LAYER_INT_IF_DOWN
);
1618 dd
->ipath_control
&= ~INFINIPATH_C_LINKENABLE
;
1619 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_control
,
1620 dd
->ipath_control
| INFINIPATH_C_FREEZEMODE
);
1623 * clear SerdesEnable and turn the leds off; do this here because
1624 * we are unloading, so don't count on interrupts to move along
1625 * Turn the LEDs off explictly for the same reason.
1627 dd
->ipath_f_quiet_serdes(dd
);
1628 dd
->ipath_f_setextled(dd
, 0, 0);
1630 if (dd
->ipath_stats_timer_active
) {
1631 del_timer_sync(&dd
->ipath_stats_timer
);
1632 dd
->ipath_stats_timer_active
= 0;
1636 * clear all interrupts and errors, so that the next time the driver
1637 * is loaded or device is enabled, we know that whatever is set
1638 * happened while we were unloaded
1640 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_hwerrclear
,
1641 ~0ULL & ~INFINIPATH_HWE_MEMBISTFAILED
);
1642 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_errorclear
, -1LL);
1643 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_intclear
, -1LL);
1647 * ipath_free_pddata - free a port's allocated data
1648 * @dd: the infinipath device
1649 * @pd: the portdata structure
1651 * free up any allocated data for a port
1652 * This should not touch anything that would affect a simultaneous
1653 * re-allocation of port data, because it is called after ipath_mutex
1654 * is released (and can be called from reinit as well).
1655 * It should never change any chip state, or global driver state.
1656 * (The only exception to global state is freeing the port0 port0_skbs.)
1658 void ipath_free_pddata(struct ipath_devdata
*dd
, struct ipath_portdata
*pd
)
1663 if (pd
->port_rcvhdrq
) {
1664 ipath_cdbg(VERBOSE
, "free closed port %d rcvhdrq @ %p "
1665 "(size=%lu)\n", pd
->port_port
, pd
->port_rcvhdrq
,
1666 (unsigned long) pd
->port_rcvhdrq_size
);
1667 dma_free_coherent(&dd
->pcidev
->dev
, pd
->port_rcvhdrq_size
,
1668 pd
->port_rcvhdrq
, pd
->port_rcvhdrq_phys
);
1669 pd
->port_rcvhdrq
= NULL
;
1670 if (pd
->port_rcvhdrtail_kvaddr
) {
1671 dma_free_coherent(&dd
->pcidev
->dev
, PAGE_SIZE
,
1672 (void *)pd
->port_rcvhdrtail_kvaddr
,
1673 pd
->port_rcvhdrqtailaddr_phys
);
1674 pd
->port_rcvhdrtail_kvaddr
= NULL
;
1677 if (pd
->port_port
&& pd
->port_rcvegrbuf
) {
1680 for (e
= 0; e
< pd
->port_rcvegrbuf_chunks
; e
++) {
1681 void *base
= pd
->port_rcvegrbuf
[e
];
1682 size_t size
= pd
->port_rcvegrbuf_size
;
1684 ipath_cdbg(VERBOSE
, "egrbuf free(%p, %lu), "
1685 "chunk %u/%u\n", base
,
1686 (unsigned long) size
,
1687 e
, pd
->port_rcvegrbuf_chunks
);
1688 dma_free_coherent(&dd
->pcidev
->dev
, size
,
1689 base
, pd
->port_rcvegrbuf_phys
[e
]);
1691 vfree(pd
->port_rcvegrbuf
);
1692 pd
->port_rcvegrbuf
= NULL
;
1693 vfree(pd
->port_rcvegrbuf_phys
);
1694 pd
->port_rcvegrbuf_phys
= NULL
;
1695 pd
->port_rcvegrbuf_chunks
= 0;
1696 } else if (pd
->port_port
== 0 && dd
->ipath_port0_skbs
) {
1698 struct sk_buff
**skbs
= dd
->ipath_port0_skbs
;
1700 dd
->ipath_port0_skbs
= NULL
;
1701 ipath_cdbg(VERBOSE
, "free closed port %d ipath_port0_skbs "
1702 "@ %p\n", pd
->port_port
, skbs
);
1703 for (e
= 0; e
< dd
->ipath_rcvegrcnt
; e
++)
1705 dev_kfree_skb(skbs
[e
]);
1708 kfree(pd
->port_tid_pg_list
);
1712 static int __init
infinipath_init(void)
1716 ipath_dbg(KERN_INFO DRIVER_LOAD_MSG
"%s", ipath_core_version
);
1719 * These must be called before the driver is registered with
1720 * the PCI subsystem.
1722 idr_init(&unit_table
);
1723 if (!idr_pre_get(&unit_table
, GFP_KERNEL
)) {
1728 ret
= pci_register_driver(&ipath_driver
);
1730 printk(KERN_ERR IPATH_DRV_NAME
1731 ": Unable to register driver: error %d\n", -ret
);
1735 ret
= ipath_driver_create_group(&ipath_driver
.driver
);
1737 printk(KERN_ERR IPATH_DRV_NAME
": Unable to create driver "
1738 "sysfs entries: error %d\n", -ret
);
1742 ret
= ipath_init_ipathfs();
1744 printk(KERN_ERR IPATH_DRV_NAME
": Unable to create "
1745 "ipathfs: error %d\n", -ret
);
1752 ipath_driver_remove_group(&ipath_driver
.driver
);
1755 pci_unregister_driver(&ipath_driver
);
1758 idr_destroy(&unit_table
);
1764 static void cleanup_device(struct ipath_devdata
*dd
)
1768 ipath_shutdown_device(dd
);
1770 if (*dd
->ipath_statusp
& IPATH_STATUS_CHIP_PRESENT
) {
1771 /* can't do anything more with chip; needs re-init */
1772 *dd
->ipath_statusp
&= ~IPATH_STATUS_CHIP_PRESENT
;
1773 if (dd
->ipath_kregbase
) {
1775 * if we haven't already cleaned up before these are
1776 * to ensure any register reads/writes "fail" until
1779 dd
->ipath_kregbase
= NULL
;
1780 dd
->ipath_uregbase
= 0;
1781 dd
->ipath_sregbase
= 0;
1782 dd
->ipath_cregbase
= 0;
1783 dd
->ipath_kregsize
= 0;
1785 ipath_disable_wc(dd
);
1788 if (dd
->ipath_pioavailregs_dma
) {
1789 dma_free_coherent(&dd
->pcidev
->dev
, PAGE_SIZE
,
1790 (void *) dd
->ipath_pioavailregs_dma
,
1791 dd
->ipath_pioavailregs_phys
);
1792 dd
->ipath_pioavailregs_dma
= NULL
;
1795 if (dd
->ipath_pageshadow
) {
1796 struct page
**tmpp
= dd
->ipath_pageshadow
;
1799 ipath_cdbg(VERBOSE
, "Unlocking any expTID pages still "
1801 for (port
= 0; port
< dd
->ipath_cfgports
; port
++) {
1802 int port_tidbase
= port
* dd
->ipath_rcvtidcnt
;
1803 int maxtid
= port_tidbase
+ dd
->ipath_rcvtidcnt
;
1804 for (i
= port_tidbase
; i
< maxtid
; i
++) {
1807 ipath_release_user_pages(&tmpp
[i
], 1);
1813 ipath_stats
.sps_pageunlocks
+= cnt
;
1814 ipath_cdbg(VERBOSE
, "There were still %u expTID "
1815 "entries locked\n", cnt
);
1817 if (ipath_stats
.sps_pagelocks
||
1818 ipath_stats
.sps_pageunlocks
)
1819 ipath_cdbg(VERBOSE
, "%llu pages locked, %llu "
1820 "unlocked via ipath_m{un}lock\n",
1821 (unsigned long long)
1822 ipath_stats
.sps_pagelocks
,
1823 (unsigned long long)
1824 ipath_stats
.sps_pageunlocks
);
1826 ipath_cdbg(VERBOSE
, "Free shadow page tid array at %p\n",
1827 dd
->ipath_pageshadow
);
1828 vfree(dd
->ipath_pageshadow
);
1829 dd
->ipath_pageshadow
= NULL
;
1833 * free any resources still in use (usually just kernel ports)
1834 * at unload; we do for portcnt, not cfgports, because cfgports
1835 * could have changed while we were loaded.
1837 for (port
= 0; port
< dd
->ipath_portcnt
; port
++) {
1838 struct ipath_portdata
*pd
= dd
->ipath_pd
[port
];
1839 dd
->ipath_pd
[port
] = NULL
;
1840 ipath_free_pddata(dd
, pd
);
1842 kfree(dd
->ipath_pd
);
1844 * debuggability, in case some cleanup path tries to use it
1847 dd
->ipath_pd
= NULL
;
1850 static void __exit
infinipath_cleanup(void)
1852 struct ipath_devdata
*dd
, *tmp
;
1853 unsigned long flags
;
1855 ipath_exit_ipathfs();
1857 ipath_driver_remove_group(&ipath_driver
.driver
);
1859 spin_lock_irqsave(&ipath_devs_lock
, flags
);
1862 * turn off rcv, send, and interrupts for all ports, all drivers
1863 * should also hard reset the chip here?
1864 * free up port 0 (kernel) rcvhdr, egr bufs, and eventually tid bufs
1865 * for all versions of the driver, if they were allocated
1867 list_for_each_entry_safe(dd
, tmp
, &ipath_dev_list
, ipath_list
) {
1868 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
1870 if (dd
->ipath_kregbase
)
1874 if (dd
->pcidev
->irq
) {
1876 "unit %u free_irq of irq %x\n",
1877 dd
->ipath_unit
, dd
->pcidev
->irq
);
1878 free_irq(dd
->pcidev
->irq
, dd
);
1880 ipath_dbg("irq is 0, not doing free_irq "
1881 "for unit %u\n", dd
->ipath_unit
);
1884 * we check for NULL here, because it's outside
1885 * the kregbase check, and we need to call it
1886 * after the free_irq. Thus it's possible that
1887 * the function pointers were never initialized.
1889 if (dd
->ipath_f_cleanup
)
1890 /* clean up chip-specific stuff */
1891 dd
->ipath_f_cleanup(dd
);
1895 spin_lock_irqsave(&ipath_devs_lock
, flags
);
1898 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
1900 ipath_cdbg(VERBOSE
, "Unregistering pci driver\n");
1901 pci_unregister_driver(&ipath_driver
);
1903 idr_destroy(&unit_table
);
1907 * ipath_reset_device - reset the chip if possible
1908 * @unit: the device to reset
1910 * Whether or not reset is successful, we attempt to re-initialize the chip
1911 * (that is, much like a driver unload/reload). We clear the INITTED flag
1912 * so that the various entry points will fail until we reinitialize. For
1913 * now, we only allow this if no user ports are open that use chip resources
1915 int ipath_reset_device(int unit
)
1918 struct ipath_devdata
*dd
= ipath_lookup(unit
);
1925 dev_info(&dd
->pcidev
->dev
, "Reset on unit %u requested\n", unit
);
1927 if (!dd
->ipath_kregbase
|| !(dd
->ipath_flags
& IPATH_PRESENT
)) {
1928 dev_info(&dd
->pcidev
->dev
, "Invalid unit number %u or "
1929 "not initialized or not present\n", unit
);
1935 for (i
= 1; i
< dd
->ipath_cfgports
; i
++) {
1936 if (dd
->ipath_pd
[i
] && dd
->ipath_pd
[i
]->port_cnt
) {
1937 ipath_dbg("unit %u port %d is in use "
1938 "(PID %u cmd %s), can't reset\n",
1940 dd
->ipath_pd
[i
]->port_pid
,
1941 dd
->ipath_pd
[i
]->port_comm
);
1947 dd
->ipath_flags
&= ~IPATH_INITTED
;
1948 ret
= dd
->ipath_f_reset(dd
);
1950 ipath_dbg("reset was not successful\n");
1951 ipath_dbg("Trying to reinitialize unit %u after reset attempt\n",
1953 ret
= ipath_init_chip(dd
, 1);
1955 ipath_dev_err(dd
, "Reinitialize unit %u after "
1956 "reset failed with %d\n", unit
, ret
);
1958 dev_info(&dd
->pcidev
->dev
, "Reinitialized unit %u after "
1959 "resetting\n", unit
);
1965 module_init(infinipath_init
);
1966 module_exit(infinipath_cleanup
);