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2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/drivers/scsi/qla2xxx/qla_inline.h
..
..
@@ -1,8 +1,7 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
1
2
 /*
2
3
  * QLogic Fibre Channel HBA Driver
3
4
  * Copyright (c)  2003-2014 QLogic Corporation
4
- *
5
- * See LICENSE.qla2xxx for copyright and licensing details.
6
5
  */
7
6
 
8
7
 #include "qla_target.h"
..
..
@@ -11,7 +10,7 @@
11
10
  * Continuation Type 1 IOCBs to allocate.
12
11
  *
13
12
  * @vha: HA context
14
- * @dsds: number of data segment decriptors needed
13
+ * @dsds: number of data segment descriptors needed
15
14
  *
16
15
  * Returns the number of IOCB entries needed to store @dsds.
17
16
  */
..
..
@@ -40,16 +39,16 @@
40
39
  *      register value.
41
40
  */
42
41
 static __inline__ uint16_t
43
-qla2x00_debounce_register(volatile uint16_t __iomem *addr)
42
+qla2x00_debounce_register(volatile __le16 __iomem *addr)
44
43
 {
45
44
 	volatile uint16_t first;
46
45
 	volatile uint16_t second;
47
46
 
48
47
 	do {
49
-		first = RD_REG_WORD(addr);
48
+		first = rd_reg_word(addr);
50
49
 		barrier();
51
50
 		cpu_relax();
52
-		second = RD_REG_WORD(addr);
51
+		second = rd_reg_word(addr);
53
52
 	} while (first != second);
54
53
 
55
54
 	return (first);
..
..
@@ -91,43 +90,6 @@
91
90
 }
92
91
 
93
92
 static inline void
94
-qla2x00_set_reserved_loop_ids(struct qla_hw_data *ha)
95
-{
96
-	int i;
97
-
98
-	if (IS_FWI2_CAPABLE(ha))
99
-		return;
100
-
101
-	for (i = 0; i < SNS_FIRST_LOOP_ID; i++)
102
-		set_bit(i, ha->loop_id_map);
103
-	set_bit(MANAGEMENT_SERVER, ha->loop_id_map);
104
-	set_bit(BROADCAST, ha->loop_id_map);
105
-}
106
-
107
-static inline int
108
-qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id)
109
-{
110
-	struct qla_hw_data *ha = vha->hw;
111
-	if (IS_FWI2_CAPABLE(ha))
112
-		return (loop_id > NPH_LAST_HANDLE);
113
-
114
-	return ((loop_id > ha->max_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
115
-	    loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
116
-}
117
-
118
-static inline void
119
-qla2x00_clear_loop_id(fc_port_t *fcport) {
120
-	struct qla_hw_data *ha = fcport->vha->hw;
121
-
122
-	if (fcport->loop_id == FC_NO_LOOP_ID ||
123
-	    qla2x00_is_reserved_id(fcport->vha, fcport->loop_id))
124
-		return;
125
-
126
-	clear_bit(fcport->loop_id, ha->loop_id_map);
127
-	fcport->loop_id = FC_NO_LOOP_ID;
128
-}
129
-
130
-static inline void
131
93
 qla2x00_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx)
132
94
 {
133
95
 	struct dsd_dma *dsd, *tdsd;
..
..
@@ -143,21 +105,26 @@
143
105
 }
144
106
 
145
107
 static inline void
146
-qla2x00_set_fcport_state(fc_port_t *fcport, int state)
108
+qla2x00_set_fcport_disc_state(fc_port_t *fcport, int state)
147
109
 {
148
-	int old_state;
110
+	int old_val;
111
+	uint8_t shiftbits, mask;
149
112
 
150
-	old_state = atomic_read(&fcport->state);
151
-	atomic_set(&fcport->state, state);
113
+	/* This will have to change when the max no. of states > 16 */
114
+	shiftbits = 4;
115
+	mask = (1 << shiftbits) - 1;
152
116
 
153
-	/* Don't print state transitions during initial allocation of fcport */
154
-	if (old_state && old_state != state) {
155
-		ql_dbg(ql_dbg_disc, fcport->vha, 0x207d,
156
-		    "FCPort %8phC state transitioned from %s to %s - "
157
-			"portid=%02x%02x%02x.\n", fcport->port_name,
158
-		    port_state_str[old_state], port_state_str[state],
159
-		    fcport->d_id.b.domain, fcport->d_id.b.area,
160
-		    fcport->d_id.b.al_pa);
117
+	fcport->disc_state = state;
118
+	while (1) {
119
+		old_val = atomic_read(&fcport->shadow_disc_state);
120
+		if (old_val == atomic_cmpxchg(&fcport->shadow_disc_state,
121
+		    old_val, (old_val << shiftbits) | state)) {
122
+			ql_dbg(ql_dbg_disc, fcport->vha, 0x2134,
123
+			    "FCPort %8phC disc_state transition: %s to %s - portid=%06x.\n",
124
+			    fcport->port_name, port_dstate_str[old_val & mask],
125
+			    port_dstate_str[state], fcport->d_id.b24);
126
+			return;
127
+		}
161
128
 	}
162
129
 }
163
130
 
..
..
@@ -208,8 +175,21 @@
208
175
 	return (qla2x00_reset_active(vha) || !vha->hw->flags.fw_started);
209
176
 }
210
177
 
178
+static void qla2xxx_init_sp(srb_t *sp, scsi_qla_host_t *vha,
179
+			    struct qla_qpair *qpair, fc_port_t *fcport)
180
+{
181
+	memset(sp, 0, sizeof(*sp));
182
+	sp->fcport = fcport;
183
+	sp->iocbs = 1;
184
+	sp->vha = vha;
185
+	sp->qpair = qpair;
186
+	sp->cmd_type = TYPE_SRB;
187
+	INIT_LIST_HEAD(&sp->elem);
188
+}
189
+
211
190
 static inline srb_t *
212
-qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
191
+qla2xxx_get_qpair_sp(scsi_qla_host_t *vha, struct qla_qpair *qpair,
192
+    fc_port_t *fcport, gfp_t flag)
213
193
 {
214
194
 	srb_t *sp = NULL;
215
195
 	uint8_t bail;
..
..
@@ -219,24 +199,22 @@
219
199
 		return NULL;
220
200
 
221
201
 	sp = mempool_alloc(qpair->srb_mempool, flag);
222
-	if (!sp)
223
-		goto done;
224
-
225
-	memset(sp, 0, sizeof(*sp));
226
-	sp->fcport = fcport;
227
-	sp->iocbs = 1;
228
-	sp->vha = qpair->vha;
229
-	INIT_LIST_HEAD(&sp->elem);
230
-
231
-done:
232
-	if (!sp)
202
+	if (sp)
203
+		qla2xxx_init_sp(sp, vha, qpair, fcport);
204
+	else
233
205
 		QLA_QPAIR_MARK_NOT_BUSY(qpair);
234
206
 	return sp;
235
207
 }
236
208
 
209
+void qla2xxx_rel_done_warning(srb_t *sp, int res);
210
+void qla2xxx_rel_free_warning(srb_t *sp);
211
+
237
212
 static inline void
238
213
 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
239
214
 {
215
+	sp->qpair = NULL;
216
+	sp->done = qla2xxx_rel_done_warning;
217
+	sp->free = qla2xxx_rel_free_warning;
240
218
 	mempool_free(sp, qpair->srb_mempool);
241
219
 	QLA_QPAIR_MARK_NOT_BUSY(qpair);
242
220
 }
..
..
@@ -246,19 +224,17 @@
246
224
 {
247
225
 	srb_t *sp = NULL;
248
226
 	uint8_t bail;
227
+	struct qla_qpair *qpair;
249
228
 
250
229
 	QLA_VHA_MARK_BUSY(vha, bail);
251
230
 	if (unlikely(bail))
252
231
 		return NULL;
253
232
 
254
-	sp = mempool_alloc(vha->hw->srb_mempool, flag);
233
+	qpair = vha->hw->base_qpair;
234
+	sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, flag);
255
235
 	if (!sp)
256
236
 		goto done;
257
237
 
258
-	memset(sp, 0, sizeof(*sp));
259
-	sp->fcport = fcport;
260
-	sp->cmd_type = TYPE_SRB;
261
-	sp->iocbs = 1;
262
238
 	sp->vha = vha;
263
239
 done:
264
240
 	if (!sp)
..
..
@@ -270,19 +246,7 @@
270
246
 qla2x00_rel_sp(srb_t *sp)
271
247
 {
272
248
 	QLA_VHA_MARK_NOT_BUSY(sp->vha);
273
-	mempool_free(sp, sp->vha->hw->srb_mempool);
274
-}
275
-
276
-static inline void
277
-qla2x00_init_timer(srb_t *sp, unsigned long tmo)
278
-{
279
-	timer_setup(&sp->u.iocb_cmd.timer, qla2x00_sp_timeout, 0);
280
-	sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
281
-	sp->free = qla2x00_sp_free;
282
-	init_completion(&sp->comp);
283
-	if (IS_QLAFX00(sp->vha->hw) && (sp->type == SRB_FXIOCB_DCMD))
284
-		init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
285
-	add_timer(&sp->u.iocb_cmd.timer);
249
+	qla2xxx_rel_qpair_sp(sp->qpair, sp);
286
250
 }
287
251
 
288
252
 static inline int
..
..
@@ -306,24 +270,54 @@
306
270
 }
307
271
 
308
272
 static inline void
309
-qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
273
+qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t sts_qual)
310
274
 {
311
-	if (retry_delay)
312
-		fcport->retry_delay_timestamp = jiffies +
313
-		    (retry_delay * HZ / 10);
275
+	u8 scope;
276
+	u16 qual;
277
+#define SQ_SCOPE_MASK		0xc000 /* SAM-6 rev5 5.3.2 */
278
+#define SQ_SCOPE_SHIFT		14
279
+#define SQ_QUAL_MASK		0x3fff
280
+
281
+#define SQ_MAX_WAIT_SEC		60 /* Max I/O hold off time in seconds. */
282
+#define SQ_MAX_WAIT_TIME	(SQ_MAX_WAIT_SEC * 10) /* in 100ms. */
283
+
284
+	if (!sts_qual) /* Common case. */
285
+		return;
286
+
287
+	scope = (sts_qual & SQ_SCOPE_MASK) >> SQ_SCOPE_SHIFT;
288
+	/* Handle only scope 1 or 2, which is for I-T nexus. */
289
+	if (scope != 1 && scope != 2)
290
+		return;
291
+
292
+	/* Skip processing, if retry delay timer is already in effect. */
293
+	if (fcport->retry_delay_timestamp &&
294
+	    time_before(jiffies, fcport->retry_delay_timestamp))
295
+		return;
296
+
297
+	qual = sts_qual & SQ_QUAL_MASK;
298
+	if (qual < 1 || qual > 0x3fef)
299
+		return;
300
+	qual = min(qual, (u16)SQ_MAX_WAIT_TIME);
301
+
302
+	/* qual is expressed in 100ms increments. */
303
+	fcport->retry_delay_timestamp = jiffies + (qual * HZ / 10);
304
+
305
+	ql_log(ql_log_warn, fcport->vha, 0x5101,
306
+	       "%8phC: I/O throttling requested (status qualifier = %04xh), holding off I/Os for %ums.\n",
307
+	       fcport->port_name, sts_qual, qual * 100);
314
308
 }
315
309
 
316
310
 static inline bool
317
311
 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
318
312
 {
319
313
 	if (qla_ini_mode_enabled(vha) &&
320
-	    (ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
314
+	    (vha->ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
321
315
 		return true;
322
316
 	else if (qla_tgt_mode_enabled(vha) &&
323
-	    (ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
317
+	    (vha->ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
324
318
 		return true;
325
319
 	else if (qla_dual_mode_enabled(vha) &&
326
-	    ((ql2xiniexchg + ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
320
+	    ((vha->ql2xiniexchg + vha->ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
327
321
 		return true;
328
322
 	else
329
323
 		return false;
..
..
@@ -369,5 +363,72 @@
369
363
 	} else
370
364
 		req->ring_ptr++;
371
365
 
372
-	WRT_REG_DWORD(req->req_q_in, req->ring_index);
366
+	wrt_reg_dword(req->req_q_in, req->ring_index);
367
+}
368
+
369
+static inline int
370
+qla2xxx_get_fc4_priority(struct scsi_qla_host *vha)
371
+{
372
+	uint32_t data;
373
+
374
+	data =
375
+	    ((uint8_t *)vha->hw->nvram)[NVRAM_DUAL_FCP_NVME_FLAG_OFFSET];
376
+
377
+
378
+	return (data >> 6) & BIT_0 ? FC4_PRIORITY_FCP : FC4_PRIORITY_NVME;
379
+}
380
+
381
+enum {
382
+	RESOURCE_NONE,
383
+	RESOURCE_INI,
384
+};
385
+
386
+static inline int
387
+qla_get_iocbs(struct qla_qpair *qp, struct iocb_resource *iores)
388
+{
389
+	u16 iocbs_used, i;
390
+	struct qla_hw_data *ha = qp->vha->hw;
391
+
392
+	if (!ql2xenforce_iocb_limit) {
393
+		iores->res_type = RESOURCE_NONE;
394
+		return 0;
395
+	}
396
+
397
+	if ((iores->iocb_cnt + qp->fwres.iocbs_used) < qp->fwres.iocbs_qp_limit) {
398
+		qp->fwres.iocbs_used += iores->iocb_cnt;
399
+		return 0;
400
+	} else {
401
+		/* no need to acquire qpair lock. It's just rough calculation */
402
+		iocbs_used = ha->base_qpair->fwres.iocbs_used;
403
+		for (i = 0; i < ha->max_qpairs; i++) {
404
+			if (ha->queue_pair_map[i])
405
+				iocbs_used += ha->queue_pair_map[i]->fwres.iocbs_used;
406
+		}
407
+
408
+		if ((iores->iocb_cnt + iocbs_used) < qp->fwres.iocbs_limit) {
409
+			qp->fwres.iocbs_used += iores->iocb_cnt;
410
+			return 0;
411
+		} else {
412
+			iores->res_type = RESOURCE_NONE;
413
+			return -ENOSPC;
414
+		}
415
+	}
416
+}
417
+
418
+static inline void
419
+qla_put_iocbs(struct qla_qpair *qp, struct iocb_resource *iores)
420
+{
421
+	switch (iores->res_type) {
422
+	case RESOURCE_NONE:
423
+		break;
424
+	default:
425
+		if (qp->fwres.iocbs_used >= iores->iocb_cnt) {
426
+			qp->fwres.iocbs_used -= iores->iocb_cnt;
427
+		} else {
428
+			// should not happen
429
+			qp->fwres.iocbs_used = 0;
430
+		}
431
+		break;
432
+	}
433
+	iores->res_type = RESOURCE_NONE;
373
434
 }