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 * This is where port 0's rcvhdrtail register is written back; we also
136 * want nothing else sharing the cache line, so make it a cache line
137 * in size. Used for all units.
139 volatile __le64
*ipath_port0_rcvhdrtail
;
140 dma_addr_t ipath_port0_rcvhdrtail_dma
;
141 static int port0_rcvhdrtail_refs
;
143 static inline void read_bars(struct ipath_devdata
*dd
, struct pci_dev
*dev
,
144 u32
*bar0
, u32
*bar1
)
148 ret
= pci_read_config_dword(dev
, PCI_BASE_ADDRESS_0
, bar0
);
150 ipath_dev_err(dd
, "failed to read bar0 before enable: "
153 ret
= pci_read_config_dword(dev
, PCI_BASE_ADDRESS_1
, bar1
);
155 ipath_dev_err(dd
, "failed to read bar1 before enable: "
158 ipath_dbg("Read bar0 %x bar1 %x\n", *bar0
, *bar1
);
161 static void ipath_free_devdata(struct pci_dev
*pdev
,
162 struct ipath_devdata
*dd
)
166 pci_set_drvdata(pdev
, NULL
);
168 if (dd
->ipath_unit
!= -1) {
169 spin_lock_irqsave(&ipath_devs_lock
, flags
);
170 idr_remove(&unit_table
, dd
->ipath_unit
);
171 list_del(&dd
->ipath_list
);
172 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
174 dma_free_coherent(&pdev
->dev
, sizeof(*dd
), dd
, dd
->ipath_dma_addr
);
177 static struct ipath_devdata
*ipath_alloc_devdata(struct pci_dev
*pdev
)
180 struct ipath_devdata
*dd
;
184 if (!idr_pre_get(&unit_table
, GFP_KERNEL
)) {
185 dd
= ERR_PTR(-ENOMEM
);
189 dd
= dma_alloc_coherent(&pdev
->dev
, sizeof(*dd
), &dma_addr
,
193 dd
= ERR_PTR(-ENOMEM
);
197 dd
->ipath_dma_addr
= dma_addr
;
200 spin_lock_irqsave(&ipath_devs_lock
, flags
);
202 ret
= idr_get_new(&unit_table
, dd
, &dd
->ipath_unit
);
204 printk(KERN_ERR IPATH_DRV_NAME
205 ": Could not allocate unit ID: error %d\n", -ret
);
206 ipath_free_devdata(pdev
, dd
);
212 pci_set_drvdata(pdev
, dd
);
214 list_add(&dd
->ipath_list
, &ipath_dev_list
);
217 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
223 static inline struct ipath_devdata
*__ipath_lookup(int unit
)
225 return idr_find(&unit_table
, unit
);
228 struct ipath_devdata
*ipath_lookup(int unit
)
230 struct ipath_devdata
*dd
;
233 spin_lock_irqsave(&ipath_devs_lock
, flags
);
234 dd
= __ipath_lookup(unit
);
235 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
240 int ipath_count_units(int *npresentp
, int *nupp
, u32
*maxportsp
)
242 int nunits
, npresent
, nup
;
243 struct ipath_devdata
*dd
;
247 nunits
= npresent
= nup
= maxports
= 0;
249 spin_lock_irqsave(&ipath_devs_lock
, flags
);
251 list_for_each_entry(dd
, &ipath_dev_list
, ipath_list
) {
253 if ((dd
->ipath_flags
& IPATH_PRESENT
) && dd
->ipath_kregbase
)
256 !(dd
->ipath_flags
& (IPATH_DISABLED
| IPATH_LINKDOWN
259 if (dd
->ipath_cfgports
> maxports
)
260 maxports
= dd
->ipath_cfgports
;
263 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
266 *npresentp
= npresent
;
270 *maxportsp
= maxports
;
275 static int init_port0_rcvhdrtail(struct pci_dev
*pdev
)
279 mutex_lock(&ipath_mutex
);
281 if (!ipath_port0_rcvhdrtail
) {
282 ipath_port0_rcvhdrtail
=
283 dma_alloc_coherent(&pdev
->dev
,
284 IPATH_PORT0_RCVHDRTAIL_SIZE
,
285 &ipath_port0_rcvhdrtail_dma
,
288 if (!ipath_port0_rcvhdrtail
) {
293 port0_rcvhdrtail_refs
++;
297 mutex_unlock(&ipath_mutex
);
302 static void cleanup_port0_rcvhdrtail(struct pci_dev
*pdev
)
304 mutex_lock(&ipath_mutex
);
306 if (!--port0_rcvhdrtail_refs
) {
307 dma_free_coherent(&pdev
->dev
, IPATH_PORT0_RCVHDRTAIL_SIZE
,
308 (void *) ipath_port0_rcvhdrtail
,
309 ipath_port0_rcvhdrtail_dma
);
310 ipath_port0_rcvhdrtail
= NULL
;
313 mutex_unlock(&ipath_mutex
);
317 * These next two routines are placeholders in case we don't have per-arch
318 * code for controlling write combining. If explicit control of write
319 * combining is not available, performance will probably be awful.
322 int __attribute__((weak
)) ipath_enable_wc(struct ipath_devdata
*dd
)
327 void __attribute__((weak
)) ipath_disable_wc(struct ipath_devdata
*dd
)
331 static int __devinit
ipath_init_one(struct pci_dev
*pdev
,
332 const struct pci_device_id
*ent
)
335 struct ipath_devdata
*dd
;
336 unsigned long long addr
;
337 u32 bar0
= 0, bar1
= 0;
340 ret
= init_port0_rcvhdrtail(pdev
);
342 printk(KERN_ERR IPATH_DRV_NAME
343 ": Could not allocate port0_rcvhdrtail: error %d\n",
348 dd
= ipath_alloc_devdata(pdev
);
351 printk(KERN_ERR IPATH_DRV_NAME
352 ": Could not allocate devdata: error %d\n", -ret
);
353 goto bail_rcvhdrtail
;
356 ipath_cdbg(VERBOSE
, "initializing unit #%u\n", dd
->ipath_unit
);
358 read_bars(dd
, pdev
, &bar0
, &bar1
);
360 ret
= pci_enable_device(pdev
);
362 /* This can happen iff:
364 * We did a chip reset, and then failed to reprogram the
365 * BAR, or the chip reset due to an internal error. We then
366 * unloaded the driver and reloaded it.
368 * Both reset cases set the BAR back to initial state. For
369 * the latter case, the AER sticky error bit at offset 0x718
370 * should be set, but the Linux kernel doesn't yet know
371 * about that, it appears. If the original BAR was retained
372 * in the kernel data structures, this may be OK.
374 ipath_dev_err(dd
, "enable unit %d failed: error %d\n",
375 dd
->ipath_unit
, -ret
);
378 addr
= pci_resource_start(pdev
, 0);
379 len
= pci_resource_len(pdev
, 0);
380 ipath_cdbg(VERBOSE
, "regbase (0) %llx len %d irq %x, vend %x/%x "
381 "driver_data %lx\n", addr
, len
, pdev
->irq
, ent
->vendor
,
382 ent
->device
, ent
->driver_data
);
384 read_bars(dd
, pdev
, &bar0
, &bar1
);
386 if (!bar1
&& !(bar0
& ~0xf)) {
388 dev_info(&pdev
->dev
, "BAR is 0 (probable RESET), "
389 "rewriting as %llx\n", addr
);
390 ret
= pci_write_config_dword(
391 pdev
, PCI_BASE_ADDRESS_0
, addr
);
393 ipath_dev_err(dd
, "rewrite of BAR0 "
394 "failed: err %d\n", -ret
);
397 ret
= pci_write_config_dword(
398 pdev
, PCI_BASE_ADDRESS_1
, addr
>> 32);
400 ipath_dev_err(dd
, "rewrite of BAR1 "
401 "failed: err %d\n", -ret
);
405 ipath_dev_err(dd
, "BAR is 0 (probable RESET), "
406 "not usable until reboot\n");
412 ret
= pci_request_regions(pdev
, IPATH_DRV_NAME
);
414 dev_info(&pdev
->dev
, "pci_request_regions unit %u fails: "
415 "err %d\n", dd
->ipath_unit
, -ret
);
419 ret
= pci_set_dma_mask(pdev
, DMA_64BIT_MASK
);
422 * if the 64 bit setup fails, try 32 bit. Some systems
423 * do not setup 64 bit maps on systems with 2GB or less
426 ret
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
);
428 dev_info(&pdev
->dev
, "pci_set_dma_mask unit %u "
429 "fails: %d\n", dd
->ipath_unit
, ret
);
433 ipath_dbg("No 64bit DMA mask, used 32 bit mask\n");
436 pci_set_master(pdev
);
439 * Save BARs to rewrite after device reset. Save all 64 bits of
442 dd
->ipath_pcibar0
= addr
;
443 dd
->ipath_pcibar1
= addr
>> 32;
444 dd
->ipath_deviceid
= ent
->device
; /* save for later use */
445 dd
->ipath_vendorid
= ent
->vendor
;
447 /* setup the chip-specific functions, as early as possible. */
448 switch (ent
->device
) {
449 case PCI_DEVICE_ID_INFINIPATH_HT
:
450 ipath_init_ht400_funcs(dd
);
452 case PCI_DEVICE_ID_INFINIPATH_PE800
:
453 ipath_init_pe800_funcs(dd
);
456 ipath_dev_err(dd
, "Found unknown QLogic deviceid 0x%x, "
457 "failing\n", ent
->device
);
461 for (j
= 0; j
< 6; j
++) {
462 if (!pdev
->resource
[j
].start
)
464 ipath_cdbg(VERBOSE
, "BAR %d start %llx, end %llx, len %llx\n",
465 j
, (unsigned long long)pdev
->resource
[j
].start
,
466 (unsigned long long)pdev
->resource
[j
].end
,
467 (unsigned long long)pci_resource_len(pdev
, j
));
471 ipath_dev_err(dd
, "No valid address in BAR 0!\n");
476 dd
->ipath_deviceid
= ent
->device
; /* save for later use */
477 dd
->ipath_vendorid
= ent
->vendor
;
479 ret
= pci_read_config_byte(pdev
, PCI_REVISION_ID
, &rev
);
481 ipath_dev_err(dd
, "Failed to read PCI revision ID unit "
482 "%u: err %d\n", dd
->ipath_unit
, -ret
);
483 goto bail_regions
; /* shouldn't ever happen */
485 dd
->ipath_pcirev
= rev
;
487 dd
->ipath_kregbase
= ioremap_nocache(addr
, len
);
489 if (!dd
->ipath_kregbase
) {
490 ipath_dbg("Unable to map io addr %llx to kvirt, failing\n",
495 dd
->ipath_kregend
= (u64 __iomem
*)
496 ((void __iomem
*)dd
->ipath_kregbase
+ len
);
497 dd
->ipath_physaddr
= addr
; /* used for io_remap, etc. */
499 dd
->ipath_kregvirt
= (u64 __iomem
*) phys_to_virt(addr
);
500 ipath_cdbg(VERBOSE
, "mapped io addr %llx to kregbase %p "
501 "kregvirt %p\n", addr
, dd
->ipath_kregbase
,
505 * clear ipath_flags here instead of in ipath_init_chip as it is set
506 * by ipath_setup_htconfig.
510 if (dd
->ipath_f_bus(dd
, pdev
))
511 ipath_dev_err(dd
, "Failed to setup config space; "
512 "continuing anyway\n");
515 * set up our interrupt handler; SA_SHIRQ probably not needed,
516 * since MSI interrupts shouldn't be shared but won't hurt for now.
517 * check 0 irq after we return from chip-specific bus setup, since
518 * that can affect this due to setup
521 ipath_dev_err(dd
, "irq is 0, BIOS error? Interrupts won't "
524 ret
= request_irq(pdev
->irq
, ipath_intr
, SA_SHIRQ
,
527 ipath_dev_err(dd
, "Couldn't setup irq handler, "
528 "irq=%u: %d\n", pdev
->irq
, ret
);
533 ret
= ipath_init_chip(dd
, 0); /* do the chip-specific init */
537 ret
= ipath_enable_wc(dd
);
540 ipath_dev_err(dd
, "Write combining not enabled "
541 "(err %d): performance may be poor\n",
546 ipath_device_create_group(&pdev
->dev
, dd
);
547 ipathfs_add_device(dd
);
555 iounmap((volatile void __iomem
*) dd
->ipath_kregbase
);
558 pci_release_regions(pdev
);
561 pci_disable_device(pdev
);
564 ipath_free_devdata(pdev
, dd
);
567 cleanup_port0_rcvhdrtail(pdev
);
573 static void __devexit
ipath_remove_one(struct pci_dev
*pdev
)
575 struct ipath_devdata
*dd
;
577 ipath_cdbg(VERBOSE
, "removing, pdev=%p\n", pdev
);
581 dd
= pci_get_drvdata(pdev
);
582 ipath_layer_remove(dd
);
583 ipath_diag_remove(dd
);
584 ipath_user_remove(dd
);
585 ipathfs_remove_device(dd
);
586 ipath_device_remove_group(&pdev
->dev
, dd
);
587 ipath_cdbg(VERBOSE
, "Releasing pci memory regions, dd %p, "
588 "unit %u\n", dd
, (u32
) dd
->ipath_unit
);
589 if (dd
->ipath_kregbase
) {
590 ipath_cdbg(VERBOSE
, "Unmapping kregbase %p\n",
592 iounmap((volatile void __iomem
*) dd
->ipath_kregbase
);
593 dd
->ipath_kregbase
= NULL
;
595 pci_release_regions(pdev
);
596 ipath_cdbg(VERBOSE
, "calling pci_disable_device\n");
597 pci_disable_device(pdev
);
599 ipath_free_devdata(pdev
, dd
);
600 cleanup_port0_rcvhdrtail(pdev
);
603 /* general driver use */
604 DEFINE_MUTEX(ipath_mutex
);
606 static DEFINE_SPINLOCK(ipath_pioavail_lock
);
609 * ipath_disarm_piobufs - cancel a range of PIO buffers
610 * @dd: the infinipath device
611 * @first: the first PIO buffer to cancel
612 * @cnt: the number of PIO buffers to cancel
614 * cancel a range of PIO buffers, used when they might be armed, but
615 * not triggered. Used at init to ensure buffer state, and also user
616 * process close, in case it died while writing to a PIO buffer
619 void ipath_disarm_piobufs(struct ipath_devdata
*dd
, unsigned first
,
622 unsigned i
, last
= first
+ cnt
;
623 u64 sendctrl
, sendorig
;
625 ipath_cdbg(PKT
, "disarm %u PIObufs first=%u\n", cnt
, first
);
626 sendorig
= dd
->ipath_sendctrl
| INFINIPATH_S_DISARM
;
627 for (i
= first
; i
< last
; i
++) {
628 sendctrl
= sendorig
|
629 (i
<< INFINIPATH_S_DISARMPIOBUF_SHIFT
);
630 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
635 * Write it again with current value, in case ipath_sendctrl changed
636 * while we were looping; no critical bits that would require
639 * Write a 0, and then the original value, reading scratch in
640 * between. This seems to avoid a chip timing race that causes
641 * pioavail updates to memory to stop.
643 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
645 sendorig
= ipath_read_kreg64(dd
, dd
->ipath_kregs
->kr_scratch
);
646 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
651 * ipath_wait_linkstate - wait for an IB link state change to occur
652 * @dd: the infinipath device
653 * @state: the state to wait for
654 * @msecs: the number of milliseconds to wait
656 * wait up to msecs milliseconds for IB link state change to occur for
657 * now, take the easy polling route. Currently used only by
658 * ipath_layer_set_linkstate. Returns 0 if state reached, otherwise
659 * -ETIMEDOUT state can have multiple states set, for any of several
662 int ipath_wait_linkstate(struct ipath_devdata
*dd
, u32 state
, int msecs
)
664 dd
->ipath_sma_state_wanted
= state
;
665 wait_event_interruptible_timeout(ipath_sma_state_wait
,
666 (dd
->ipath_flags
& state
),
667 msecs_to_jiffies(msecs
));
668 dd
->ipath_sma_state_wanted
= 0;
670 if (!(dd
->ipath_flags
& state
)) {
672 ipath_cdbg(SMA
, "Didn't reach linkstate %s within %u ms\n",
673 /* test INIT ahead of DOWN, both can be set */
674 (state
& IPATH_LINKINIT
) ? "INIT" :
675 ((state
& IPATH_LINKDOWN
) ? "DOWN" :
676 ((state
& IPATH_LINKARMED
) ? "ARM" : "ACTIVE")),
678 val
= ipath_read_kreg64(dd
, dd
->ipath_kregs
->kr_ibcstatus
);
679 ipath_cdbg(VERBOSE
, "ibcc=%llx ibcstatus=%llx (%s)\n",
680 (unsigned long long) ipath_read_kreg64(
681 dd
, dd
->ipath_kregs
->kr_ibcctrl
),
682 (unsigned long long) val
,
683 ipath_ibcstatus_str
[val
& 0xf]);
685 return (dd
->ipath_flags
& state
) ? 0 : -ETIMEDOUT
;
688 void ipath_decode_err(char *buf
, size_t blen
, ipath_err_t err
)
691 if (err
& INFINIPATH_E_RHDRLEN
)
692 strlcat(buf
, "rhdrlen ", blen
);
693 if (err
& INFINIPATH_E_RBADTID
)
694 strlcat(buf
, "rbadtid ", blen
);
695 if (err
& INFINIPATH_E_RBADVERSION
)
696 strlcat(buf
, "rbadversion ", blen
);
697 if (err
& INFINIPATH_E_RHDR
)
698 strlcat(buf
, "rhdr ", blen
);
699 if (err
& INFINIPATH_E_RLONGPKTLEN
)
700 strlcat(buf
, "rlongpktlen ", blen
);
701 if (err
& INFINIPATH_E_RSHORTPKTLEN
)
702 strlcat(buf
, "rshortpktlen ", blen
);
703 if (err
& INFINIPATH_E_RMAXPKTLEN
)
704 strlcat(buf
, "rmaxpktlen ", blen
);
705 if (err
& INFINIPATH_E_RMINPKTLEN
)
706 strlcat(buf
, "rminpktlen ", blen
);
707 if (err
& INFINIPATH_E_RFORMATERR
)
708 strlcat(buf
, "rformaterr ", blen
);
709 if (err
& INFINIPATH_E_RUNSUPVL
)
710 strlcat(buf
, "runsupvl ", blen
);
711 if (err
& INFINIPATH_E_RUNEXPCHAR
)
712 strlcat(buf
, "runexpchar ", blen
);
713 if (err
& INFINIPATH_E_RIBFLOW
)
714 strlcat(buf
, "ribflow ", blen
);
715 if (err
& INFINIPATH_E_REBP
)
716 strlcat(buf
, "EBP ", blen
);
717 if (err
& INFINIPATH_E_SUNDERRUN
)
718 strlcat(buf
, "sunderrun ", blen
);
719 if (err
& INFINIPATH_E_SPIOARMLAUNCH
)
720 strlcat(buf
, "spioarmlaunch ", blen
);
721 if (err
& INFINIPATH_E_SUNEXPERRPKTNUM
)
722 strlcat(buf
, "sunexperrpktnum ", blen
);
723 if (err
& INFINIPATH_E_SDROPPEDDATAPKT
)
724 strlcat(buf
, "sdroppeddatapkt ", blen
);
725 if (err
& INFINIPATH_E_SDROPPEDSMPPKT
)
726 strlcat(buf
, "sdroppedsmppkt ", blen
);
727 if (err
& INFINIPATH_E_SMAXPKTLEN
)
728 strlcat(buf
, "smaxpktlen ", blen
);
729 if (err
& INFINIPATH_E_SMINPKTLEN
)
730 strlcat(buf
, "sminpktlen ", blen
);
731 if (err
& INFINIPATH_E_SUNSUPVL
)
732 strlcat(buf
, "sunsupVL ", blen
);
733 if (err
& INFINIPATH_E_SPKTLEN
)
734 strlcat(buf
, "spktlen ", blen
);
735 if (err
& INFINIPATH_E_INVALIDADDR
)
736 strlcat(buf
, "invalidaddr ", blen
);
737 if (err
& INFINIPATH_E_RICRC
)
738 strlcat(buf
, "CRC ", blen
);
739 if (err
& INFINIPATH_E_RVCRC
)
740 strlcat(buf
, "VCRC ", blen
);
741 if (err
& INFINIPATH_E_RRCVEGRFULL
)
742 strlcat(buf
, "rcvegrfull ", blen
);
743 if (err
& INFINIPATH_E_RRCVHDRFULL
)
744 strlcat(buf
, "rcvhdrfull ", blen
);
745 if (err
& INFINIPATH_E_IBSTATUSCHANGED
)
746 strlcat(buf
, "ibcstatuschg ", blen
);
747 if (err
& INFINIPATH_E_RIBLOSTLINK
)
748 strlcat(buf
, "riblostlink ", blen
);
749 if (err
& INFINIPATH_E_HARDWARE
)
750 strlcat(buf
, "hardware ", blen
);
751 if (err
& INFINIPATH_E_RESET
)
752 strlcat(buf
, "reset ", blen
);
756 * get_rhf_errstring - decode RHF errors
757 * @err: the err number
758 * @msg: the output buffer
759 * @len: the length of the output buffer
761 * only used one place now, may want more later
763 static void get_rhf_errstring(u32 err
, char *msg
, size_t len
)
765 /* if no errors, and so don't need to check what's first */
768 if (err
& INFINIPATH_RHF_H_ICRCERR
)
769 strlcat(msg
, "icrcerr ", len
);
770 if (err
& INFINIPATH_RHF_H_VCRCERR
)
771 strlcat(msg
, "vcrcerr ", len
);
772 if (err
& INFINIPATH_RHF_H_PARITYERR
)
773 strlcat(msg
, "parityerr ", len
);
774 if (err
& INFINIPATH_RHF_H_LENERR
)
775 strlcat(msg
, "lenerr ", len
);
776 if (err
& INFINIPATH_RHF_H_MTUERR
)
777 strlcat(msg
, "mtuerr ", len
);
778 if (err
& INFINIPATH_RHF_H_IHDRERR
)
779 /* infinipath hdr checksum error */
780 strlcat(msg
, "ipathhdrerr ", len
);
781 if (err
& INFINIPATH_RHF_H_TIDERR
)
782 strlcat(msg
, "tiderr ", len
);
783 if (err
& INFINIPATH_RHF_H_MKERR
)
784 /* bad port, offset, etc. */
785 strlcat(msg
, "invalid ipathhdr ", len
);
786 if (err
& INFINIPATH_RHF_H_IBERR
)
787 strlcat(msg
, "iberr ", len
);
788 if (err
& INFINIPATH_RHF_L_SWA
)
789 strlcat(msg
, "swA ", len
);
790 if (err
& INFINIPATH_RHF_L_SWB
)
791 strlcat(msg
, "swB ", len
);
795 * ipath_get_egrbuf - get an eager buffer
796 * @dd: the infinipath device
797 * @bufnum: the eager buffer to get
800 * must only be called if ipath_pd[port] is known to be allocated
802 static inline void *ipath_get_egrbuf(struct ipath_devdata
*dd
, u32 bufnum
,
805 return dd
->ipath_port0_skbs
?
806 (void *)dd
->ipath_port0_skbs
[bufnum
]->data
: NULL
;
810 * ipath_alloc_skb - allocate an skb and buffer with possible constraints
811 * @dd: the infinipath device
812 * @gfp_mask: the sk_buff SFP mask
814 struct sk_buff
*ipath_alloc_skb(struct ipath_devdata
*dd
,
821 * Only fully supported way to handle this is to allocate lots
822 * extra, align as needed, and then do skb_reserve(). That wastes
823 * a lot of memory... I'll have to hack this into infinipath_copy
828 * We need 4 extra bytes for unaligned transfer copying
830 if (dd
->ipath_flags
& IPATH_4BYTE_TID
) {
831 /* we need a 4KB multiple alignment, and there is no way
832 * to do it except to allocate extra and then skb_reserve
833 * enough to bring it up to the right alignment.
835 len
= dd
->ipath_ibmaxlen
+ 4 + (1 << 11) - 1;
838 len
= dd
->ipath_ibmaxlen
+ 4;
839 skb
= __dev_alloc_skb(len
, gfp_mask
);
841 ipath_dev_err(dd
, "Failed to allocate skbuff, length %u\n",
845 if (dd
->ipath_flags
& IPATH_4BYTE_TID
) {
846 u32 una
= ((1 << 11) - 1) & (unsigned long)(skb
->data
+ 4);
848 skb_reserve(skb
, 4 + (1 << 11) - una
);
859 * ipath_rcv_layer - receive a packet for the layered (ethernet) driver
860 * @dd: the infinipath device
861 * @etail: the sk_buff number
862 * @tlen: the total packet length
863 * @hdr: the ethernet header
865 * Separate routine for better overall optimization
867 static void ipath_rcv_layer(struct ipath_devdata
*dd
, u32 etail
,
868 u32 tlen
, struct ether_header
*hdr
)
872 struct sk_buff
*skb
, *nskb
;
874 if (dd
->ipath_port0_skbs
&& hdr
->sub_opcode
== OPCODE_ENCAP
) {
876 * Allocate a new sk_buff to replace the one we give
877 * to the network stack.
879 nskb
= ipath_alloc_skb(dd
, GFP_ATOMIC
);
881 /* count OK packets that we drop */
882 ipath_stats
.sps_krdrops
++;
886 bthbytes
= (u8
*) hdr
->bth
;
887 pad
= (bthbytes
[1] >> 4) & 3;
889 elen
= tlen
- (sizeof(*hdr
) + pad
+ sizeof(u32
));
891 skb
= dd
->ipath_port0_skbs
[etail
];
892 dd
->ipath_port0_skbs
[etail
] = nskb
;
895 dd
->ipath_f_put_tid(dd
, etail
+ (u64 __iomem
*)
896 ((char __iomem
*) dd
->ipath_kregbase
897 + dd
->ipath_rcvegrbase
), 0,
898 virt_to_phys(nskb
->data
));
900 __ipath_layer_rcv(dd
, hdr
, skb
);
902 /* another ether packet received */
903 ipath_stats
.sps_ether_rpkts
++;
905 else if (hdr
->sub_opcode
== OPCODE_LID_ARP
)
906 __ipath_layer_rcv_lid(dd
, hdr
);
910 * ipath_kreceive - receive a packet
911 * @dd: the infinipath device
913 * called from interrupt handler for errors or receive interrupt
915 void ipath_kreceive(struct ipath_devdata
*dd
)
919 const u32 rsize
= dd
->ipath_rcvhdrentsize
; /* words */
920 const u32 maxcnt
= dd
->ipath_rcvhdrcnt
* rsize
; /* words */
921 u32 etail
= -1, l
, hdrqtail
;
922 struct ips_message_header
*hdr
;
923 u32 eflags
, i
, etype
, tlen
, pkttot
= 0;
924 static u64 totcalls
; /* stats, may eventually remove */
927 if (!dd
->ipath_hdrqtailptr
) {
929 "hdrqtailptr not set, can't do receives\n");
933 /* There is already a thread processing this queue. */
934 if (test_and_set_bit(0, &dd
->ipath_rcv_pending
))
937 if (dd
->ipath_port0head
==
938 (u32
)le64_to_cpu(*dd
->ipath_hdrqtailptr
))
943 * read only once at start. If in flood situation, this helps
944 * performance slightly. If more arrive while we are processing,
945 * we'll come back here and do them
947 hdrqtail
= (u32
)le64_to_cpu(*dd
->ipath_hdrqtailptr
);
949 for (i
= 0, l
= dd
->ipath_port0head
; l
!= hdrqtail
; i
++) {
953 rc
= (u64
*) (dd
->ipath_pd
[0]->port_rcvhdrq
+ (l
<< 2));
954 hdr
= (struct ips_message_header
*)&rc
[1];
956 * could make a network order version of IPATH_KD_QP, and
957 * do the obvious shift before masking to speed this up.
959 qp
= ntohl(hdr
->bth
[1]) & 0xffffff;
960 bthbytes
= (u8
*) hdr
->bth
;
962 eflags
= ips_get_hdr_err_flags((__le32
*) rc
);
963 etype
= ips_get_rcv_type((__le32
*) rc
);
965 tlen
= ips_get_length_in_bytes((__le32
*) rc
);
967 if (etype
!= RCVHQ_RCV_TYPE_EXPECTED
) {
969 * it turns out that the chips uses an eager buffer
970 * for all non-expected packets, whether it "needs"
971 * one or not. So always get the index, but don't
972 * set ebuf (so we try to copy data) unless the
973 * length requires it.
975 etail
= ips_get_index((__le32
*) rc
);
976 if (tlen
> sizeof(*hdr
) ||
977 etype
== RCVHQ_RCV_TYPE_NON_KD
)
978 ebuf
= ipath_get_egrbuf(dd
, etail
, 0);
982 * both tiderr and ipathhdrerr are set for all plain IB
983 * packets; only ipathhdrerr should be set.
986 if (etype
!= RCVHQ_RCV_TYPE_NON_KD
&& etype
!=
987 RCVHQ_RCV_TYPE_ERROR
&& ips_get_ipath_ver(
988 hdr
->iph
.ver_port_tid_offset
) !=
990 ipath_cdbg(PKT
, "Bad InfiniPath protocol version "
994 if (eflags
& ~(INFINIPATH_RHF_H_TIDERR
|
995 INFINIPATH_RHF_H_IHDRERR
)) {
996 get_rhf_errstring(eflags
, emsg
, sizeof emsg
);
997 ipath_cdbg(PKT
, "RHFerrs %x hdrqtail=%x typ=%u "
998 "tlen=%x opcode=%x egridx=%x: %s\n",
999 eflags
, l
, etype
, tlen
, bthbytes
[0],
1000 ips_get_index((__le32
*) rc
), emsg
);
1001 } else if (etype
== RCVHQ_RCV_TYPE_NON_KD
) {
1002 int ret
= __ipath_verbs_rcv(dd
, rc
+ 1,
1006 "received IB packet, "
1007 "not SMA (QP=%x)\n", qp
);
1008 } else if (etype
== RCVHQ_RCV_TYPE_EAGER
) {
1009 if (qp
== IPATH_KD_QP
&&
1010 bthbytes
[0] == ipath_layer_rcv_opcode
&&
1012 ipath_rcv_layer(dd
, etail
, tlen
,
1013 (struct ether_header
*)hdr
);
1015 ipath_cdbg(PKT
, "typ %x, opcode %x (eager, "
1016 "qp=%x), len %x; ignored\n",
1017 etype
, bthbytes
[0], qp
, tlen
);
1019 else if (etype
== RCVHQ_RCV_TYPE_EXPECTED
)
1020 ipath_dbg("Bug: Expected TID, opcode %x; ignored\n",
1021 be32_to_cpu(hdr
->bth
[0]) & 0xff);
1022 else if (eflags
& (INFINIPATH_RHF_H_TIDERR
|
1023 INFINIPATH_RHF_H_IHDRERR
)) {
1025 * This is a type 3 packet, only the LRH is in the
1026 * rcvhdrq, the rest of the header is in the eager
1031 bthbytes
= (u8
*) ebuf
;
1036 get_rhf_errstring(eflags
, emsg
, sizeof emsg
);
1037 ipath_dbg("Err %x (%s), opcode %x, egrbuf %x, "
1038 "len %x\n", eflags
, emsg
, opcode
, etail
,
1042 * error packet, type of error unknown.
1043 * Probably type 3, but we don't know, so don't
1044 * even try to print the opcode, etc.
1046 ipath_dbg("Error Pkt, but no eflags! egrbuf %x, "
1047 "len %x\nhdrq@%lx;hdrq+%x rhf: %llx; "
1048 "hdr %llx %llx %llx %llx %llx\n",
1049 etail
, tlen
, (unsigned long) rc
, l
,
1050 (unsigned long long) rc
[0],
1051 (unsigned long long) rc
[1],
1052 (unsigned long long) rc
[2],
1053 (unsigned long long) rc
[3],
1054 (unsigned long long) rc
[4],
1055 (unsigned long long) rc
[5]);
1061 * update for each packet, to help prevent overflows if we
1062 * have lots of packets.
1064 (void)ipath_write_ureg(dd
, ur_rcvhdrhead
,
1065 dd
->ipath_rhdrhead_intr_off
| l
, 0);
1066 if (etype
!= RCVHQ_RCV_TYPE_EXPECTED
)
1067 (void)ipath_write_ureg(dd
, ur_rcvegrindexhead
,
1073 dd
->ipath_port0head
= l
;
1075 if (hdrqtail
!= (u32
)le64_to_cpu(*dd
->ipath_hdrqtailptr
))
1076 /* more arrived while we handled first batch */
1079 if (pkttot
> ipath_stats
.sps_maxpkts_call
)
1080 ipath_stats
.sps_maxpkts_call
= pkttot
;
1081 ipath_stats
.sps_port0pkts
+= pkttot
;
1082 ipath_stats
.sps_avgpkts_call
=
1083 ipath_stats
.sps_port0pkts
/ ++totcalls
;
1086 clear_bit(0, &dd
->ipath_rcv_pending
);
1087 smp_mb__after_clear_bit();
1093 * ipath_update_pio_bufs - update shadow copy of the PIO availability map
1094 * @dd: the infinipath device
1096 * called whenever our local copy indicates we have run out of send buffers
1097 * NOTE: This can be called from interrupt context by some code
1098 * and from non-interrupt context by ipath_getpiobuf().
1101 static void ipath_update_pio_bufs(struct ipath_devdata
*dd
)
1103 unsigned long flags
;
1105 const unsigned piobregs
= (unsigned)dd
->ipath_pioavregs
;
1107 /* If the generation (check) bits have changed, then we update the
1108 * busy bit for the corresponding PIO buffer. This algorithm will
1109 * modify positions to the value they already have in some cases
1110 * (i.e., no change), but it's faster than changing only the bits
1111 * that have changed.
1113 * We would like to do this atomicly, to avoid spinlocks in the
1114 * critical send path, but that's not really possible, given the
1115 * type of changes, and that this routine could be called on
1116 * multiple cpu's simultaneously, so we lock in this routine only,
1117 * to avoid conflicting updates; all we change is the shadow, and
1118 * it's a single 64 bit memory location, so by definition the update
1119 * is atomic in terms of what other cpu's can see in testing the
1120 * bits. The spin_lock overhead isn't too bad, since it only
1121 * happens when all buffers are in use, so only cpu overhead, not
1122 * latency or bandwidth is affected.
1124 #define _IPATH_ALL_CHECKBITS 0x5555555555555555ULL
1125 if (!dd
->ipath_pioavailregs_dma
) {
1126 ipath_dbg("Update shadow pioavail, but regs_dma NULL!\n");
1129 if (ipath_debug
& __IPATH_VERBDBG
) {
1130 /* only if packet debug and verbose */
1131 volatile __le64
*dma
= dd
->ipath_pioavailregs_dma
;
1132 unsigned long *shadow
= dd
->ipath_pioavailshadow
;
1134 ipath_cdbg(PKT
, "Refill avail, dma0=%llx shad0=%lx, "
1135 "d1=%llx s1=%lx, d2=%llx s2=%lx, d3=%llx "
1137 (unsigned long long) le64_to_cpu(dma
[0]),
1139 (unsigned long long) le64_to_cpu(dma
[1]),
1141 (unsigned long long) le64_to_cpu(dma
[2]),
1143 (unsigned long long) le64_to_cpu(dma
[3]),
1147 PKT
, "2nd group, dma4=%llx shad4=%lx, "
1148 "d5=%llx s5=%lx, d6=%llx s6=%lx, "
1150 (unsigned long long) le64_to_cpu(dma
[4]),
1152 (unsigned long long) le64_to_cpu(dma
[5]),
1154 (unsigned long long) le64_to_cpu(dma
[6]),
1156 (unsigned long long) le64_to_cpu(dma
[7]),
1159 spin_lock_irqsave(&ipath_pioavail_lock
, flags
);
1160 for (i
= 0; i
< piobregs
; i
++) {
1161 u64 pchbusy
, pchg
, piov
, pnew
;
1163 * Chip Errata: bug 6641; even and odd qwords>3 are swapped
1168 dd
->ipath_pioavailregs_dma
[i
- 1]);
1171 dd
->ipath_pioavailregs_dma
[i
+ 1]);
1173 piov
= le64_to_cpu(dd
->ipath_pioavailregs_dma
[i
]);
1174 pchg
= _IPATH_ALL_CHECKBITS
&
1175 ~(dd
->ipath_pioavailshadow
[i
] ^ piov
);
1176 pchbusy
= pchg
<< INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT
;
1177 if (pchg
&& (pchbusy
& dd
->ipath_pioavailshadow
[i
])) {
1178 pnew
= dd
->ipath_pioavailshadow
[i
] & ~pchbusy
;
1179 pnew
|= piov
& pchbusy
;
1180 dd
->ipath_pioavailshadow
[i
] = pnew
;
1183 spin_unlock_irqrestore(&ipath_pioavail_lock
, flags
);
1187 * ipath_setrcvhdrsize - set the receive header size
1188 * @dd: the infinipath device
1189 * @rhdrsize: the receive header size
1191 * called from user init code, and also layered driver init
1193 int ipath_setrcvhdrsize(struct ipath_devdata
*dd
, unsigned rhdrsize
)
1197 if (dd
->ipath_flags
& IPATH_RCVHDRSZ_SET
) {
1198 if (dd
->ipath_rcvhdrsize
!= rhdrsize
) {
1199 dev_info(&dd
->pcidev
->dev
,
1200 "Error: can't set protocol header "
1201 "size %u, already %u\n",
1202 rhdrsize
, dd
->ipath_rcvhdrsize
);
1205 ipath_cdbg(VERBOSE
, "Reuse same protocol header "
1206 "size %u\n", dd
->ipath_rcvhdrsize
);
1207 } else if (rhdrsize
> (dd
->ipath_rcvhdrentsize
-
1208 (sizeof(u64
) / sizeof(u32
)))) {
1209 ipath_dbg("Error: can't set protocol header size %u "
1210 "(> max %u)\n", rhdrsize
,
1211 dd
->ipath_rcvhdrentsize
-
1212 (u32
) (sizeof(u64
) / sizeof(u32
)));
1215 dd
->ipath_flags
|= IPATH_RCVHDRSZ_SET
;
1216 dd
->ipath_rcvhdrsize
= rhdrsize
;
1217 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_rcvhdrsize
,
1218 dd
->ipath_rcvhdrsize
);
1219 ipath_cdbg(VERBOSE
, "Set protocol header size to %u\n",
1220 dd
->ipath_rcvhdrsize
);
1226 * ipath_getpiobuf - find an available pio buffer
1227 * @dd: the infinipath device
1228 * @pbufnum: the buffer number is placed here
1230 * do appropriate marking as busy, etc.
1231 * returns buffer number if one found (>=0), negative number is error.
1232 * Used by ipath_sma_send_pkt and ipath_layer_send
1234 u32 __iomem
*ipath_getpiobuf(struct ipath_devdata
*dd
, u32
* pbufnum
)
1236 int i
, j
, starti
, updated
= 0;
1237 unsigned piobcnt
, iter
;
1238 unsigned long flags
;
1239 unsigned long *shadow
= dd
->ipath_pioavailshadow
;
1242 piobcnt
= (unsigned)(dd
->ipath_piobcnt2k
1243 + dd
->ipath_piobcnt4k
);
1244 starti
= dd
->ipath_lastport_piobuf
;
1245 iter
= piobcnt
- starti
;
1246 if (dd
->ipath_upd_pio_shadow
) {
1248 * Minor optimization. If we had no buffers on last call,
1249 * start out by doing the update; continue and do scan even
1250 * if no buffers were updated, to be paranoid
1252 ipath_update_pio_bufs(dd
);
1253 /* we scanned here, don't do it at end of scan */
1257 i
= dd
->ipath_lastpioindex
;
1261 * while test_and_set_bit() is atomic, we do that and then the
1262 * change_bit(), and the pair is not. See if this is the cause
1263 * of the remaining armlaunch errors.
1265 spin_lock_irqsave(&ipath_pioavail_lock
, flags
);
1266 for (j
= 0; j
< iter
; j
++, i
++) {
1270 * To avoid bus lock overhead, we first find a candidate
1271 * buffer, then do the test and set, and continue if that
1274 if (test_bit((2 * i
) + 1, shadow
) ||
1275 test_and_set_bit((2 * i
) + 1, shadow
))
1277 /* flip generation bit */
1278 change_bit(2 * i
, shadow
);
1281 spin_unlock_irqrestore(&ipath_pioavail_lock
, flags
);
1284 volatile __le64
*dma
= dd
->ipath_pioavailregs_dma
;
1287 * first time through; shadow exhausted, but may be real
1288 * buffers available, so go see; if any updated, rescan
1292 ipath_update_pio_bufs(dd
);
1297 dd
->ipath_upd_pio_shadow
= 1;
1299 * not atomic, but if we lose one once in a while, that's OK
1301 ipath_stats
.sps_nopiobufs
++;
1302 if (!(++dd
->ipath_consec_nopiobuf
% 100000)) {
1304 "%u pio sends with no bufavail; dmacopy: "
1305 "%llx %llx %llx %llx; shadow: "
1306 "%lx %lx %lx %lx\n",
1307 dd
->ipath_consec_nopiobuf
,
1308 (unsigned long long) le64_to_cpu(dma
[0]),
1309 (unsigned long long) le64_to_cpu(dma
[1]),
1310 (unsigned long long) le64_to_cpu(dma
[2]),
1311 (unsigned long long) le64_to_cpu(dma
[3]),
1312 shadow
[0], shadow
[1], shadow
[2],
1315 * 4 buffers per byte, 4 registers above, cover rest
1318 if ((dd
->ipath_piobcnt2k
+ dd
->ipath_piobcnt4k
) >
1319 (sizeof(shadow
[0]) * 4 * 4))
1320 ipath_dbg("2nd group: dmacopy: %llx %llx "
1321 "%llx %llx; shadow: %lx %lx "
1323 (unsigned long long)
1324 le64_to_cpu(dma
[4]),
1325 (unsigned long long)
1326 le64_to_cpu(dma
[5]),
1327 (unsigned long long)
1328 le64_to_cpu(dma
[6]),
1329 (unsigned long long)
1330 le64_to_cpu(dma
[7]),
1331 shadow
[4], shadow
[5],
1332 shadow
[6], shadow
[7]);
1340 * ran out of bufs, now some (at least this one we just
1341 * got) are now available, so tell the layered driver.
1343 __ipath_layer_intr(dd
, IPATH_LAYER_INT_SEND_CONTINUE
);
1346 * set next starting place. Since it's just an optimization,
1347 * it doesn't matter who wins on this, so no locking
1349 dd
->ipath_lastpioindex
= i
+ 1;
1350 if (dd
->ipath_upd_pio_shadow
)
1351 dd
->ipath_upd_pio_shadow
= 0;
1352 if (dd
->ipath_consec_nopiobuf
)
1353 dd
->ipath_consec_nopiobuf
= 0;
1354 if (i
< dd
->ipath_piobcnt2k
)
1355 buf
= (u32 __iomem
*) (dd
->ipath_pio2kbase
+
1356 i
* dd
->ipath_palign
);
1358 buf
= (u32 __iomem
*)
1359 (dd
->ipath_pio4kbase
+
1360 (i
- dd
->ipath_piobcnt2k
) * dd
->ipath_4kalign
);
1361 ipath_cdbg(VERBOSE
, "Return piobuf%u %uk @ %p\n",
1362 i
, (i
< dd
->ipath_piobcnt2k
) ? 2 : 4, buf
);
1371 * ipath_create_rcvhdrq - create a receive header queue
1372 * @dd: the infinipath device
1373 * @pd: the port data
1375 * this *must* be physically contiguous memory, and for now,
1376 * that limits it to what kmalloc can do.
1378 int ipath_create_rcvhdrq(struct ipath_devdata
*dd
,
1379 struct ipath_portdata
*pd
)
1383 amt
= ALIGN(dd
->ipath_rcvhdrcnt
* dd
->ipath_rcvhdrentsize
*
1384 sizeof(u32
), PAGE_SIZE
);
1385 if (!pd
->port_rcvhdrq
) {
1387 * not using REPEAT isn't viable; at 128KB, we can easily
1388 * fail this. The problem with REPEAT is we can block here
1389 * "forever". There isn't an inbetween, unfortunately. We
1390 * could reduce the risk by never freeing the rcvhdrq except
1391 * at unload, but even then, the first time a port is used,
1392 * we could delay for some time...
1394 gfp_t gfp_flags
= GFP_USER
| __GFP_COMP
;
1396 pd
->port_rcvhdrq
= dma_alloc_coherent(
1397 &dd
->pcidev
->dev
, amt
, &pd
->port_rcvhdrq_phys
,
1400 if (!pd
->port_rcvhdrq
) {
1401 ipath_dev_err(dd
, "attempt to allocate %d bytes "
1402 "for port %u rcvhdrq failed\n",
1403 amt
, pd
->port_port
);
1408 pd
->port_rcvhdrq_size
= amt
;
1410 ipath_cdbg(VERBOSE
, "%d pages at %p (phys %lx) size=%lu "
1411 "for port %u rcvhdr Q\n",
1412 amt
>> PAGE_SHIFT
, pd
->port_rcvhdrq
,
1413 (unsigned long) pd
->port_rcvhdrq_phys
,
1414 (unsigned long) pd
->port_rcvhdrq_size
,
1418 * clear for security, sanity, and/or debugging, each
1421 memset(pd
->port_rcvhdrq
, 0, amt
);
1425 * tell chip each time we init it, even if we are re-using previous
1426 * memory (we zero it at process close)
1428 ipath_cdbg(VERBOSE
, "writing port %d rcvhdraddr as %lx\n",
1429 pd
->port_port
, (unsigned long) pd
->port_rcvhdrq_phys
);
1430 ipath_write_kreg_port(dd
, dd
->ipath_kregs
->kr_rcvhdraddr
,
1431 pd
->port_port
, pd
->port_rcvhdrq_phys
);
1438 int ipath_waitfor_complete(struct ipath_devdata
*dd
, ipath_kreg reg_id
,
1439 u64 bits_to_wait_for
, u64
* valp
)
1441 unsigned long timeout
;
1445 lastval
= ipath_read_kreg64(dd
, reg_id
);
1446 /* wait a ridiculously long time */
1447 timeout
= jiffies
+ msecs_to_jiffies(5);
1449 val
= ipath_read_kreg64(dd
, reg_id
);
1450 /* set so they have something, even on failures. */
1452 if ((val
& bits_to_wait_for
) == bits_to_wait_for
) {
1457 ipath_cdbg(VERBOSE
, "Changed from %llx to %llx, "
1458 "waiting for %llx bits\n",
1459 (unsigned long long) lastval
,
1460 (unsigned long long) val
,
1461 (unsigned long long) bits_to_wait_for
);
1463 if (time_after(jiffies
, timeout
)) {
1464 ipath_dbg("Didn't get bits %llx in register 0x%x, "
1466 (unsigned long long) bits_to_wait_for
,
1467 reg_id
, (unsigned long long) *valp
);
1477 * ipath_waitfor_mdio_cmdready - wait for last command to complete
1478 * @dd: the infinipath device
1480 * Like ipath_waitfor_complete(), but we wait for the CMDVALID bit to go
1481 * away indicating the last command has completed. It doesn't return data
1483 int ipath_waitfor_mdio_cmdready(struct ipath_devdata
*dd
)
1485 unsigned long timeout
;
1489 /* wait a ridiculously long time */
1490 timeout
= jiffies
+ msecs_to_jiffies(5);
1492 val
= ipath_read_kreg64(dd
, dd
->ipath_kregs
->kr_mdio
);
1493 if (!(val
& IPATH_MDIO_CMDVALID
)) {
1498 if (time_after(jiffies
, timeout
)) {
1499 ipath_dbg("CMDVALID stuck in mdio reg? (%llx)\n",
1500 (unsigned long long) val
);
1509 void ipath_set_ib_lstate(struct ipath_devdata
*dd
, int which
)
1511 static const char *what
[4] = {
1513 [INFINIPATH_IBCC_LINKCMD_INIT
] = "INIT",
1514 [INFINIPATH_IBCC_LINKCMD_ARMED
] = "ARMED",
1515 [INFINIPATH_IBCC_LINKCMD_ACTIVE
] = "ACTIVE"
1517 ipath_cdbg(SMA
, "Trying to move unit %u to %s, current ltstate "
1518 "is %s\n", dd
->ipath_unit
,
1519 what
[(which
>> INFINIPATH_IBCC_LINKCMD_SHIFT
) &
1520 INFINIPATH_IBCC_LINKCMD_MASK
],
1521 ipath_ibcstatus_str
[
1523 (dd
, dd
->ipath_kregs
->kr_ibcstatus
) >>
1524 INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT
) &
1525 INFINIPATH_IBCS_LINKTRAININGSTATE_MASK
]);
1527 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_ibcctrl
,
1528 dd
->ipath_ibcctrl
| which
);
1532 * ipath_read_kreg64_port - read a device's per-port 64-bit kernel register
1533 * @dd: the infinipath device
1534 * @regno: the register number to read
1535 * @port: the port containing the register
1537 * Registers that vary with the chip implementation constants (port)
1540 u64
ipath_read_kreg64_port(const struct ipath_devdata
*dd
, ipath_kreg regno
,
1545 if (port
< dd
->ipath_portcnt
&&
1546 (regno
== dd
->ipath_kregs
->kr_rcvhdraddr
||
1547 regno
== dd
->ipath_kregs
->kr_rcvhdrtailaddr
))
1548 where
= regno
+ port
;
1552 return ipath_read_kreg64(dd
, where
);
1556 * ipath_write_kreg_port - write a device's per-port 64-bit kernel register
1557 * @dd: the infinipath device
1558 * @regno: the register number to write
1559 * @port: the port containing the register
1560 * @value: the value to write
1562 * Registers that vary with the chip implementation constants (port)
1565 void ipath_write_kreg_port(const struct ipath_devdata
*dd
, ipath_kreg regno
,
1566 unsigned port
, u64 value
)
1570 if (port
< dd
->ipath_portcnt
&&
1571 (regno
== dd
->ipath_kregs
->kr_rcvhdraddr
||
1572 regno
== dd
->ipath_kregs
->kr_rcvhdrtailaddr
))
1573 where
= regno
+ port
;
1577 ipath_write_kreg(dd
, where
, value
);
1581 * ipath_shutdown_device - shut down a device
1582 * @dd: the infinipath device
1584 * This is called to make the device quiet when we are about to
1585 * unload the driver, and also when the device is administratively
1586 * disabled. It does not free any data structures.
1587 * Everything it does has to be setup again by ipath_init_chip(dd,1)
1589 void ipath_shutdown_device(struct ipath_devdata
*dd
)
1593 ipath_dbg("Shutting down the device\n");
1595 dd
->ipath_flags
|= IPATH_LINKUNK
;
1596 dd
->ipath_flags
&= ~(IPATH_INITTED
| IPATH_LINKDOWN
|
1597 IPATH_LINKINIT
| IPATH_LINKARMED
|
1599 *dd
->ipath_statusp
&= ~(IPATH_STATUS_IB_CONF
|
1600 IPATH_STATUS_IB_READY
);
1602 /* mask interrupts, but not errors */
1603 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_intmask
, 0ULL);
1605 dd
->ipath_rcvctrl
= 0;
1606 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_rcvctrl
,
1610 * gracefully stop all sends allowing any in progress to trickle out
1613 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
, 0ULL);
1615 val
= ipath_read_kreg64(dd
, dd
->ipath_kregs
->kr_scratch
);
1617 * enough for anything that's going to trickle out to have actually
1623 * abort any armed or launched PIO buffers that didn't go. (self
1624 * clearing). Will cause any packet currently being transmitted to
1625 * go out with an EBP, and may also cause a short packet error on
1628 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_sendctrl
,
1629 INFINIPATH_S_ABORT
);
1631 ipath_set_ib_lstate(dd
, INFINIPATH_IBCC_LINKINITCMD_DISABLE
<<
1632 INFINIPATH_IBCC_LINKINITCMD_SHIFT
);
1635 * we are shutting down, so tell the layered driver. We don't do
1636 * this on just a link state change, much like ethernet, a cable
1637 * unplug, etc. doesn't change driver state
1639 ipath_layer_intr(dd
, IPATH_LAYER_INT_IF_DOWN
);
1642 dd
->ipath_control
&= ~INFINIPATH_C_LINKENABLE
;
1643 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_control
,
1647 * clear SerdesEnable and turn the leds off; do this here because
1648 * we are unloading, so don't count on interrupts to move along
1649 * Turn the LEDs off explictly for the same reason.
1651 dd
->ipath_f_quiet_serdes(dd
);
1652 dd
->ipath_f_setextled(dd
, 0, 0);
1654 if (dd
->ipath_stats_timer_active
) {
1655 del_timer_sync(&dd
->ipath_stats_timer
);
1656 dd
->ipath_stats_timer_active
= 0;
1660 * clear all interrupts and errors, so that the next time the driver
1661 * is loaded or device is enabled, we know that whatever is set
1662 * happened while we were unloaded
1664 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_hwerrclear
,
1665 ~0ULL & ~INFINIPATH_HWE_MEMBISTFAILED
);
1666 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_errorclear
, -1LL);
1667 ipath_write_kreg(dd
, dd
->ipath_kregs
->kr_intclear
, -1LL);
1671 * ipath_free_pddata - free a port's allocated data
1672 * @dd: the infinipath device
1674 * @freehdrq: free the port data structure if true
1676 * when closing, free up any allocated data for a port, if the
1677 * reference count goes to zero
1678 * Note: this also optionally frees the portdata itself!
1679 * Any changes here have to be matched up with the reinit case
1680 * of ipath_init_chip(), which calls this routine on reinit after reset.
1682 void ipath_free_pddata(struct ipath_devdata
*dd
, u32 port
, int freehdrq
)
1684 struct ipath_portdata
*pd
= dd
->ipath_pd
[port
];
1690 * only clear and free portdata if we are going to also
1691 * release the hdrq, otherwise we leak the hdrq on each
1694 dd
->ipath_pd
[port
] = NULL
;
1695 if (freehdrq
&& pd
->port_rcvhdrq
) {
1696 ipath_cdbg(VERBOSE
, "free closed port %d rcvhdrq @ %p "
1697 "(size=%lu)\n", pd
->port_port
, pd
->port_rcvhdrq
,
1698 (unsigned long) pd
->port_rcvhdrq_size
);
1699 dma_free_coherent(&dd
->pcidev
->dev
, pd
->port_rcvhdrq_size
,
1700 pd
->port_rcvhdrq
, pd
->port_rcvhdrq_phys
);
1701 pd
->port_rcvhdrq
= NULL
;
1703 if (port
&& pd
->port_rcvegrbuf
) {
1704 /* always free this */
1705 if (pd
->port_rcvegrbuf
) {
1708 for (e
= 0; e
< pd
->port_rcvegrbuf_chunks
; e
++) {
1709 void *base
= pd
->port_rcvegrbuf
[e
];
1710 size_t size
= pd
->port_rcvegrbuf_size
;
1712 ipath_cdbg(VERBOSE
, "egrbuf free(%p, %lu), "
1713 "chunk %u/%u\n", base
,
1714 (unsigned long) size
,
1715 e
, pd
->port_rcvegrbuf_chunks
);
1717 &dd
->pcidev
->dev
, size
, base
,
1718 pd
->port_rcvegrbuf_phys
[e
]);
1720 vfree(pd
->port_rcvegrbuf
);
1721 pd
->port_rcvegrbuf
= NULL
;
1722 vfree(pd
->port_rcvegrbuf_phys
);
1723 pd
->port_rcvegrbuf_phys
= NULL
;
1725 pd
->port_rcvegrbuf_chunks
= 0;
1726 } else if (port
== 0 && dd
->ipath_port0_skbs
) {
1728 struct sk_buff
**skbs
= dd
->ipath_port0_skbs
;
1730 dd
->ipath_port0_skbs
= NULL
;
1731 ipath_cdbg(VERBOSE
, "free closed port %d ipath_port0_skbs "
1732 "@ %p\n", pd
->port_port
, skbs
);
1733 for (e
= 0; e
< dd
->ipath_rcvegrcnt
; e
++)
1735 dev_kfree_skb(skbs
[e
]);
1739 kfree(pd
->port_tid_pg_list
);
1744 static int __init
infinipath_init(void)
1748 ipath_dbg(KERN_INFO DRIVER_LOAD_MSG
"%s", ipath_core_version
);
1751 * These must be called before the driver is registered with
1752 * the PCI subsystem.
1754 idr_init(&unit_table
);
1755 if (!idr_pre_get(&unit_table
, GFP_KERNEL
)) {
1760 ret
= pci_register_driver(&ipath_driver
);
1762 printk(KERN_ERR IPATH_DRV_NAME
1763 ": Unable to register driver: error %d\n", -ret
);
1767 ret
= ipath_driver_create_group(&ipath_driver
.driver
);
1769 printk(KERN_ERR IPATH_DRV_NAME
": Unable to create driver "
1770 "sysfs entries: error %d\n", -ret
);
1774 ret
= ipath_init_ipathfs();
1776 printk(KERN_ERR IPATH_DRV_NAME
": Unable to create "
1777 "ipathfs: error %d\n", -ret
);
1784 ipath_driver_remove_group(&ipath_driver
.driver
);
1787 pci_unregister_driver(&ipath_driver
);
1790 idr_destroy(&unit_table
);
1796 static void cleanup_device(struct ipath_devdata
*dd
)
1800 ipath_shutdown_device(dd
);
1802 if (*dd
->ipath_statusp
& IPATH_STATUS_CHIP_PRESENT
) {
1803 /* can't do anything more with chip; needs re-init */
1804 *dd
->ipath_statusp
&= ~IPATH_STATUS_CHIP_PRESENT
;
1805 if (dd
->ipath_kregbase
) {
1807 * if we haven't already cleaned up before these are
1808 * to ensure any register reads/writes "fail" until
1811 dd
->ipath_kregbase
= NULL
;
1812 dd
->ipath_kregvirt
= NULL
;
1813 dd
->ipath_uregbase
= 0;
1814 dd
->ipath_sregbase
= 0;
1815 dd
->ipath_cregbase
= 0;
1816 dd
->ipath_kregsize
= 0;
1818 ipath_disable_wc(dd
);
1821 if (dd
->ipath_pioavailregs_dma
) {
1822 dma_free_coherent(&dd
->pcidev
->dev
, PAGE_SIZE
,
1823 (void *) dd
->ipath_pioavailregs_dma
,
1824 dd
->ipath_pioavailregs_phys
);
1825 dd
->ipath_pioavailregs_dma
= NULL
;
1828 if (dd
->ipath_pageshadow
) {
1829 struct page
**tmpp
= dd
->ipath_pageshadow
;
1832 ipath_cdbg(VERBOSE
, "Unlocking any expTID pages still "
1834 for (port
= 0; port
< dd
->ipath_cfgports
; port
++) {
1835 int port_tidbase
= port
* dd
->ipath_rcvtidcnt
;
1836 int maxtid
= port_tidbase
+ dd
->ipath_rcvtidcnt
;
1837 for (i
= port_tidbase
; i
< maxtid
; i
++) {
1840 ipath_release_user_pages(&tmpp
[i
], 1);
1846 ipath_stats
.sps_pageunlocks
+= cnt
;
1847 ipath_cdbg(VERBOSE
, "There were still %u expTID "
1848 "entries locked\n", cnt
);
1850 if (ipath_stats
.sps_pagelocks
||
1851 ipath_stats
.sps_pageunlocks
)
1852 ipath_cdbg(VERBOSE
, "%llu pages locked, %llu "
1853 "unlocked via ipath_m{un}lock\n",
1854 (unsigned long long)
1855 ipath_stats
.sps_pagelocks
,
1856 (unsigned long long)
1857 ipath_stats
.sps_pageunlocks
);
1859 ipath_cdbg(VERBOSE
, "Free shadow page tid array at %p\n",
1860 dd
->ipath_pageshadow
);
1861 vfree(dd
->ipath_pageshadow
);
1862 dd
->ipath_pageshadow
= NULL
;
1866 * free any resources still in use (usually just kernel ports)
1869 for (port
= 0; port
< dd
->ipath_cfgports
; port
++)
1870 ipath_free_pddata(dd
, port
, 1);
1871 kfree(dd
->ipath_pd
);
1873 * debuggability, in case some cleanup path tries to use it
1876 dd
->ipath_pd
= NULL
;
1879 static void __exit
infinipath_cleanup(void)
1881 struct ipath_devdata
*dd
, *tmp
;
1882 unsigned long flags
;
1884 ipath_exit_ipathfs();
1886 ipath_driver_remove_group(&ipath_driver
.driver
);
1888 spin_lock_irqsave(&ipath_devs_lock
, flags
);
1891 * turn off rcv, send, and interrupts for all ports, all drivers
1892 * should also hard reset the chip here?
1893 * free up port 0 (kernel) rcvhdr, egr bufs, and eventually tid bufs
1894 * for all versions of the driver, if they were allocated
1896 list_for_each_entry_safe(dd
, tmp
, &ipath_dev_list
, ipath_list
) {
1897 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
1899 if (dd
->ipath_kregbase
)
1903 if (dd
->pcidev
->irq
) {
1905 "unit %u free_irq of irq %x\n",
1906 dd
->ipath_unit
, dd
->pcidev
->irq
);
1907 free_irq(dd
->pcidev
->irq
, dd
);
1909 ipath_dbg("irq is 0, not doing free_irq "
1910 "for unit %u\n", dd
->ipath_unit
);
1913 * we check for NULL here, because it's outside
1914 * the kregbase check, and we need to call it
1915 * after the free_irq. Thus it's possible that
1916 * the function pointers were never initialized.
1918 if (dd
->ipath_f_cleanup
)
1919 /* clean up chip-specific stuff */
1920 dd
->ipath_f_cleanup(dd
);
1924 spin_lock_irqsave(&ipath_devs_lock
, flags
);
1927 spin_unlock_irqrestore(&ipath_devs_lock
, flags
);
1929 ipath_cdbg(VERBOSE
, "Unregistering pci driver\n");
1930 pci_unregister_driver(&ipath_driver
);
1932 idr_destroy(&unit_table
);
1936 * ipath_reset_device - reset the chip if possible
1937 * @unit: the device to reset
1939 * Whether or not reset is successful, we attempt to re-initialize the chip
1940 * (that is, much like a driver unload/reload). We clear the INITTED flag
1941 * so that the various entry points will fail until we reinitialize. For
1942 * now, we only allow this if no user ports are open that use chip resources
1944 int ipath_reset_device(int unit
)
1947 struct ipath_devdata
*dd
= ipath_lookup(unit
);
1954 dev_info(&dd
->pcidev
->dev
, "Reset on unit %u requested\n", unit
);
1956 if (!dd
->ipath_kregbase
|| !(dd
->ipath_flags
& IPATH_PRESENT
)) {
1957 dev_info(&dd
->pcidev
->dev
, "Invalid unit number %u or "
1958 "not initialized or not present\n", unit
);
1964 for (i
= 1; i
< dd
->ipath_cfgports
; i
++) {
1965 if (dd
->ipath_pd
[i
] && dd
->ipath_pd
[i
]->port_cnt
) {
1966 ipath_dbg("unit %u port %d is in use "
1967 "(PID %u cmd %s), can't reset\n",
1969 dd
->ipath_pd
[i
]->port_pid
,
1970 dd
->ipath_pd
[i
]->port_comm
);
1976 dd
->ipath_flags
&= ~IPATH_INITTED
;
1977 ret
= dd
->ipath_f_reset(dd
);
1979 ipath_dbg("reset was not successful\n");
1980 ipath_dbg("Trying to reinitialize unit %u after reset attempt\n",
1982 ret
= ipath_init_chip(dd
, 1);
1984 ipath_dev_err(dd
, "Reinitialize unit %u after "
1985 "reset failed with %d\n", unit
, ret
);
1987 dev_info(&dd
->pcidev
->dev
, "Reinitialized unit %u after "
1988 "resetting\n", unit
);
1994 module_init(infinipath_init
);
1995 module_exit(infinipath_cleanup
);