Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
/* $Id$
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1992-1997, 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
 */

#ident  "$Revision: 1.167 $"

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <asm/smp.h>
#include <asm/irq.h>
#include <asm/hw_irq.h>
#include <asm/system.h>
#include <asm/sn/sgi.h>
#include <asm/sn/iograph.h>
#include <asm/sn/invent.h>
#include <asm/sn/hcl.h>
#include <asm/sn/labelcl.h>
#include <asm/sn/io.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/pci/pciio.h>
#include <asm/sn/pci/pcibr.h>
#include <asm/sn/xtalk/xtalk.h>
#include <asm/sn/pci/pcibr_private.h>
#include <asm/sn/intr.h>
#include <asm/sn/sn2/shub_mmr_t.h>
#include <asm/sal.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/sndrv.h>
#include <asm/sn/sn2/shubio.h>
#include <asm/sn/sn2/shub_mmr.h>

/*
 * Shub WAR for Xbridge Little Endian problem:
 *	Xbridge has to run in BIG ENDIAN even with Shub.
 */


/*
 * io_sh_swapper: Turn on Shub byte swapping.
 *	All data destined to and from Shub to XIO are byte-swapped.
 */
void
io_sh_swapper(nasid_t nasid, int onoff)
{
    ii_iwc_u_t      ii_iwc;

    ii_iwc.ii_iwc_regval = REMOTE_HUB_L(nasid, IIO_IWC);

    ii_iwc.ii_iwc_fld_s.i_dma_byte_swap = onoff;
    REMOTE_HUB_S(nasid, IIO_IWC, ii_iwc.ii_iwc_regval);
    ii_iwc.ii_iwc_regval = REMOTE_HUB_L(nasid, IIO_IWC);

}

/*
 * io_get_sh_swapper: Return current Swap mode.
 *	1 = Swap on, 0 = Swap off.
 */
int
io_get_sh_swapper(nasid_t nasid)
{
    ii_iwc_u_t      ii_iwc;

    ii_iwc.ii_iwc_regval = REMOTE_HUB_L(nasid, IIO_IWC);
    return(ii_iwc.ii_iwc_fld_s.i_dma_byte_swap);

}

#define SHUB_NUM_ECF_REGISTERS 8

static uint32_t	shub_perf_counts[SHUB_NUM_ECF_REGISTERS];

static shubreg_t shub_perf_counts_regs[SHUB_NUM_ECF_REGISTERS] = {
	SH_PERFORMANCE_COUNTER0,
	SH_PERFORMANCE_COUNTER1,
	SH_PERFORMANCE_COUNTER2,
	SH_PERFORMANCE_COUNTER3,
	SH_PERFORMANCE_COUNTER4,
	SH_PERFORMANCE_COUNTER5,
	SH_PERFORMANCE_COUNTER6,
	SH_PERFORMANCE_COUNTER7
};

static inline void
shub_mmr_write(cnodeid_t cnode, shubreg_t reg, uint64_t val)
{
	int		   nasid = cnodeid_to_nasid(cnode);
	volatile uint64_t *addr = (uint64_t *)(GLOBAL_MMR_ADDR(nasid, reg));

	*addr = val;
	__ia64_mf_a();
}

static inline void
shub_mmr_write_iospace(cnodeid_t cnode, shubreg_t reg, uint64_t val)
{
	int		   nasid = cnodeid_to_nasid(cnode);

	REMOTE_HUB_S(nasid, reg, val);
}

static inline void
shub_mmr_write32(cnodeid_t cnode, shubreg_t reg, uint32_t val)
{
	int		   nasid = cnodeid_to_nasid(cnode);
	volatile uint32_t *addr = (uint32_t *)(GLOBAL_MMR_ADDR(nasid, reg));

	*addr = val;
	__ia64_mf_a();
}

static inline uint64_t
shub_mmr_read(cnodeid_t cnode, shubreg_t reg)
{
	int		  nasid = cnodeid_to_nasid(cnode);
	volatile uint64_t val;

	val = *(uint64_t *)(GLOBAL_MMR_ADDR(nasid, reg));
	__ia64_mf_a();

	return val;
}

static inline uint64_t
shub_mmr_read_iospace(cnodeid_t cnode, shubreg_t reg)
{
	int		  nasid = cnodeid_to_nasid(cnode);

	return REMOTE_HUB_L(nasid, reg);
}

static inline uint32_t
shub_mmr_read32(cnodeid_t cnode, shubreg_t reg)
{
	int		  nasid = cnodeid_to_nasid(cnode);
	volatile uint32_t val;

	val = *(uint32_t *)(GLOBAL_MMR_ADDR(nasid, reg));
	__ia64_mf_a();

	return val;
}

static int
reset_shub_stats(cnodeid_t cnode)
{
	int i;

	for (i=0; i < SHUB_NUM_ECF_REGISTERS; i++) {
		shub_perf_counts[i] = 0;
		shub_mmr_write32(cnode, shub_perf_counts_regs[i], 0);
	}
	return 0;
}

static int
configure_shub_stats(cnodeid_t cnode, unsigned long arg)
{
	uint64_t	*p = (uint64_t *)arg;
	uint64_t	i;
	uint64_t	regcnt;
	uint64_t	regval[2];

	if (copy_from_user((void *)&regcnt, p, sizeof(regcnt)))
	    return -EFAULT;

	for (p++, i=0; i < regcnt; i++, p += 2) {
		if (copy_from_user((void *)regval, (void *)p, sizeof(regval)))
		    return -EFAULT;
		if (regval[0] & 0x7) {
		    printk("Error: configure_shub_stats: unaligned address 0x%016lx\n", regval[0]);
		    return -EINVAL;
		}
		shub_mmr_write(cnode, (shubreg_t)regval[0], regval[1]);
	}
	return 0;
}

static int
capture_shub_stats(cnodeid_t cnode, uint32_t *counts)
{
	int 		i;

	for (i=0; i < SHUB_NUM_ECF_REGISTERS; i++) {
		counts[i] = shub_mmr_read32(cnode, shub_perf_counts_regs[i]);
	}
	return 0;
}

static int
shubstats_ioctl(struct inode *inode, struct file *file,
        unsigned int cmd, unsigned long arg)
{
        cnodeid_t       cnode;
        uint64_t        longarg;
	int		nasid;

        cnode = (cnodeid_t)file->f_dentry->d_fsdata;

        switch (cmd) {
	case SNDRV_SHUB_CONFIGURE:
		return configure_shub_stats(cnode, arg);
		break;

	case SNDRV_SHUB_RESETSTATS:
		reset_shub_stats(cnode);
		break;

	case SNDRV_SHUB_INFOSIZE:
		longarg = sizeof(shub_perf_counts);
		if (copy_to_user((void *)arg, &longarg, sizeof(longarg))) {
		    return -EFAULT;
		}
		break;

	case SNDRV_SHUB_GETSTATS:
		capture_shub_stats(cnode, shub_perf_counts);
		if (copy_to_user((void *)arg, shub_perf_counts,
				       	sizeof(shub_perf_counts))) {
		    return -EFAULT;
		}
		break;

	case SNDRV_SHUB_GETNASID:
		nasid = cnodeid_to_nasid(cnode);
		if (copy_to_user((void *)arg, &nasid,
				       	sizeof(nasid))) {
		    return -EFAULT;
		}
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

struct file_operations shub_mon_fops = {
	        .ioctl          = shubstats_ioctl,
};

/*
 * "linkstatd" kernel thread to export SGI Numalink
 * stats via /proc/sgi_sn/linkstats
 */
static struct s_linkstats {
	uint64_t	hs_ni_sn_errors[2];
	uint64_t	hs_ni_cb_errors[2];
	uint64_t	hs_ni_retry_errors[2];
	int		hs_ii_up;
	uint64_t	hs_ii_sn_errors;
	uint64_t	hs_ii_cb_errors;
	uint64_t	hs_ii_retry_errors;
} *sn_linkstats;

static spinlock_t    sn_linkstats_lock;
static unsigned long sn_linkstats_starttime;
static unsigned long sn_linkstats_samples;
static unsigned long sn_linkstats_overflows;
static unsigned long sn_linkstats_update_msecs;

void
sn_linkstats_reset(unsigned long msecs)
{
	int		    cnode;
	uint64_t	    iio_wstat;
	uint64_t	    llp_csr_reg;

	spin_lock(&sn_linkstats_lock);
	memset(sn_linkstats, 0, numnodes * sizeof(struct s_linkstats));
	for (cnode=0; cnode < numnodes; cnode++) {
	    shub_mmr_write(cnode, SH_NI0_LLP_ERR, 0L);
	    shub_mmr_write(cnode, SH_NI1_LLP_ERR, 0L);
	    shub_mmr_write_iospace(cnode, IIO_LLP_LOG, 0L);

	    /* zero the II retry counter */
	    iio_wstat = shub_mmr_read_iospace(cnode, IIO_WSTAT);
	    iio_wstat &= 0xffffffffff00ffff; /* bits 23:16 */
	    shub_mmr_write_iospace(cnode, IIO_WSTAT, iio_wstat);

	    /* Check if the II xtalk link is working */
	    llp_csr_reg = shub_mmr_read_iospace(cnode, IIO_LLP_CSR);
	    if (llp_csr_reg & IIO_LLP_CSR_IS_UP)
		sn_linkstats[cnode].hs_ii_up = 1;
	}

    	sn_linkstats_update_msecs = msecs;
	sn_linkstats_samples = 0;
	sn_linkstats_overflows = 0;
	sn_linkstats_starttime = jiffies;
	spin_unlock(&sn_linkstats_lock);
}

int
linkstatd_thread(void *unused)
{
	int		    cnode;
	int		    overflows;
	uint64_t	    reg[2];
	uint64_t	    iio_wstat = 0L;
	ii_illr_u_t	    illr;
	struct s_linkstats  *lsp;
	struct task_struct  *tsk = current;

	daemonize("linkstatd");
	set_user_nice(tsk, 19);
	sigfillset(&tsk->blocked);
	strcpy(tsk->comm, "linkstatd");

	while(1) {
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(sn_linkstats_update_msecs * HZ / 1000);

		spin_lock(&sn_linkstats_lock);

		overflows = 0;
		for (lsp=sn_linkstats, cnode=0; cnode < numnodes; cnode++, lsp++) {
			reg[0] = shub_mmr_read(cnode, SH_NI0_LLP_ERR);
			reg[1] = shub_mmr_read(cnode, SH_NI1_LLP_ERR);
			if (lsp->hs_ii_up) {
			    illr = (ii_illr_u_t)shub_mmr_read_iospace(cnode, IIO_LLP_LOG);
			    iio_wstat = shub_mmr_read_iospace(cnode, IIO_WSTAT);
			}

			if (!overflows && (
			    (reg[0] & SH_NI0_LLP_ERR_RX_SN_ERR_COUNT_MASK) == 
				     SH_NI0_LLP_ERR_RX_SN_ERR_COUNT_MASK ||
			    (reg[0] & SH_NI0_LLP_ERR_RX_CB_ERR_COUNT_MASK) ==
			             SH_NI0_LLP_ERR_RX_CB_ERR_COUNT_MASK ||
			    (reg[1] & SH_NI1_LLP_ERR_RX_SN_ERR_COUNT_MASK) ==
			             SH_NI1_LLP_ERR_RX_SN_ERR_COUNT_MASK ||
			    (reg[1] & SH_NI1_LLP_ERR_RX_CB_ERR_COUNT_MASK) ==
			             SH_NI1_LLP_ERR_RX_CB_ERR_COUNT_MASK ||
			    (lsp->hs_ii_up && illr.ii_illr_fld_s.i_sn_cnt == IIO_LLP_SN_MAX) ||
			    (lsp->hs_ii_up && illr.ii_illr_fld_s.i_cb_cnt == IIO_LLP_CB_MAX))) {
			    overflows = 1;
			}

#define LINKSTAT_UPDATE(reg, cnt, mask, shift) cnt += (reg & mask) >> shift

			LINKSTAT_UPDATE(reg[0], lsp->hs_ni_sn_errors[0],
					SH_NI0_LLP_ERR_RX_SN_ERR_COUNT_MASK,
					SH_NI0_LLP_ERR_RX_SN_ERR_COUNT_SHFT);

			LINKSTAT_UPDATE(reg[1], lsp->hs_ni_sn_errors[1],
					SH_NI1_LLP_ERR_RX_SN_ERR_COUNT_MASK,
					SH_NI1_LLP_ERR_RX_SN_ERR_COUNT_SHFT);

			LINKSTAT_UPDATE(reg[0], lsp->hs_ni_cb_errors[0],
					SH_NI0_LLP_ERR_RX_CB_ERR_COUNT_MASK,
					SH_NI0_LLP_ERR_RX_CB_ERR_COUNT_SHFT);

			LINKSTAT_UPDATE(reg[1], lsp->hs_ni_cb_errors[1],
					SH_NI1_LLP_ERR_RX_CB_ERR_COUNT_MASK,
					SH_NI1_LLP_ERR_RX_CB_ERR_COUNT_SHFT);

			LINKSTAT_UPDATE(reg[0], lsp->hs_ni_retry_errors[0],
					SH_NI0_LLP_ERR_RETRY_COUNT_MASK,
					SH_NI0_LLP_ERR_RETRY_COUNT_SHFT);

			LINKSTAT_UPDATE(reg[1], lsp->hs_ni_retry_errors[1],
					SH_NI1_LLP_ERR_RETRY_COUNT_MASK,
					SH_NI1_LLP_ERR_RETRY_COUNT_SHFT);

			if (lsp->hs_ii_up) {
			    /* II sn and cb errors */
			    lsp->hs_ii_sn_errors += illr.ii_illr_fld_s.i_sn_cnt;
			    lsp->hs_ii_cb_errors += illr.ii_illr_fld_s.i_cb_cnt;
			    lsp->hs_ii_retry_errors += (iio_wstat & 0x0000000000ff0000) >> 16;

			    shub_mmr_write(cnode, SH_NI0_LLP_ERR, 0L);
			    shub_mmr_write(cnode, SH_NI1_LLP_ERR, 0L);
			    shub_mmr_write_iospace(cnode, IIO_LLP_LOG, 0L);

			    /* zero the II retry counter */
			    iio_wstat = shub_mmr_read_iospace(cnode, IIO_WSTAT);
			    iio_wstat &= 0xffffffffff00ffff; /* bits 23:16 */
			    shub_mmr_write_iospace(cnode, IIO_WSTAT, iio_wstat);
			}
		}

		sn_linkstats_samples++;
		if (overflows)
		    sn_linkstats_overflows++;

		spin_unlock(&sn_linkstats_lock);
	}
}

static char *
rate_per_minute(uint64_t val, uint64_t secs)
{
	static char	buf[16];
	uint64_t	a=0, b=0, c=0, d=0;

	if (secs) {
		a = 60 * val / secs;
		b = 60 * 10 * val / secs - (10 * a);
		c = 60 * 100 * val / secs - (100 * a) - (10 * b);
		d = 60 * 1000 * val / secs - (1000 * a) - (100 * b) - (10 * c);
	}
	sprintf(buf, "%4lu.%lu%lu%lu", a, b, c, d);

	return buf;
}

int
sn_linkstats_get(char *page)
{
	int			n = 0;
	int			cnode;
	int			nlport;
	struct s_linkstats	*lsp;
	nodepda_t		*npda;
	uint64_t	    	snsum = 0;
	uint64_t	    	cbsum = 0;
	uint64_t	    	retrysum = 0;
	uint64_t	    	snsum_ii = 0;
	uint64_t	    	cbsum_ii = 0;
	uint64_t	    	retrysum_ii = 0;
	uint64_t		secs;

	spin_lock(&sn_linkstats_lock);
	secs = (jiffies - sn_linkstats_starttime) / HZ;

	n += sprintf(page, "# SGI Numalink stats v1 : %lu samples, %lu o/flows, update %lu msecs\n",
		sn_linkstats_samples, sn_linkstats_overflows, sn_linkstats_update_msecs);

	n += sprintf(page+n, "%-37s %8s %8s %8s %8s\n",
		"# Numalink", "sn errs", "cb errs", "cb/min", "retries");

	for (lsp=sn_linkstats, cnode=0; cnode < numnodes; cnode++, lsp++) {
		npda = NODEPDA(cnode);

		/* two NL links on each SHub */
		for (nlport=0; nlport < 2; nlport++) {
			cbsum += lsp->hs_ni_cb_errors[nlport];
			snsum += lsp->hs_ni_sn_errors[nlport];
			retrysum += lsp->hs_ni_retry_errors[nlport];

			/* avoid buffer overrun (should be using seq_read API) */
			if (numnodes > 64)
				continue;

			n += sprintf(page + n, "/%s/link/%d  %8lu %8lu %8s %8lu\n",
			    npda->hwg_node_name, nlport+1, lsp->hs_ni_sn_errors[nlport],
			    lsp->hs_ni_cb_errors[nlport], 
			    rate_per_minute(lsp->hs_ni_cb_errors[nlport], secs),
			    lsp->hs_ni_retry_errors[nlport]);
		}

		/* one II port on each SHub (may not be connected) */
		if (lsp->hs_ii_up) {
		    n += sprintf(page + n, "/%s/xtalk   %8lu %8lu %8s %8lu\n",
			npda->hwg_node_name, lsp->hs_ii_sn_errors,
			lsp->hs_ii_cb_errors, rate_per_minute(lsp->hs_ii_cb_errors, secs),
			lsp->hs_ii_retry_errors);

		    snsum_ii += lsp->hs_ii_sn_errors;
		    cbsum_ii += lsp->hs_ii_cb_errors;
		    retrysum_ii += lsp->hs_ii_retry_errors;
		}
	}

	n += sprintf(page + n, "%-37s %8lu %8lu %8s %8lu\n",
		"System wide NL totals", snsum, cbsum, 
		rate_per_minute(cbsum, secs), retrysum);

	n += sprintf(page + n, "%-37s %8lu %8lu %8s %8lu\n",
		"System wide II totals", snsum_ii, cbsum_ii, 
		rate_per_minute(cbsum_ii, secs), retrysum_ii);

	spin_unlock(&sn_linkstats_lock);

	return n;
}

static int __init
linkstatd_init(void)
{
	if (!ia64_platform_is("sn2"))
		return -ENODEV;

	spin_lock_init(&sn_linkstats_lock);
	sn_linkstats = kmalloc(numnodes * sizeof(struct s_linkstats), GFP_KERNEL);
	sn_linkstats_reset(60000UL); /* default 60 second update interval */
	kernel_thread(linkstatd_thread, NULL, CLONE_KERNEL);

	return 0;                                                                       
}

__initcall(linkstatd_init);