xref: /linux/drivers/scsi/qla2xxx/qla_inline.h (revision 6f52b16c5b29b89d92c0e7236f4655dc8491ad70) 
1 /*
2  * QLogic Fibre Channel HBA Driver
3  * Copyright (c)  2003-2014 QLogic Corporation
4  *
5  * See LICENSE.qla2xxx for copyright and licensing details.
6  */
7 
8 #include "qla_target.h"
9 /**
10  * qla24xx_calc_iocbs() - Determine number of Command Type 3 and
11  * Continuation Type 1 IOCBs to allocate.
12  *
13  * @dsds: number of data segment decriptors needed
14  *
15  * Returns the number of IOCB entries needed to store @dsds.
16  */
17 static inline uint16_t
18 qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
19 {
20 	uint16_t iocbs;
21 
22 	iocbs = 1;
23 	if (dsds > 1) {
24 		iocbs += (dsds - 1) / 5;
25 		if ((dsds - 1) % 5)
26 			iocbs++;
27 	}
28 	return iocbs;
29 }
30 
31 /*
32  * qla2x00_debounce_register
33  *      Debounce register.
34  *
35  * Input:
36  *      port = register address.
37  *
38  * Returns:
39  *      register value.
40  */
41 static __inline__ uint16_t
42 qla2x00_debounce_register(volatile uint16_t __iomem *addr)
43 {
44 	volatile uint16_t first;
45 	volatile uint16_t second;
46 
47 	do {
48 		first = RD_REG_WORD(addr);
49 		barrier();
50 		cpu_relax();
51 		second = RD_REG_WORD(addr);
52 	} while (first != second);
53 
54 	return (first);
55 }
56 
57 static inline void
58 qla2x00_poll(struct rsp_que *rsp)
59 {
60 	unsigned long flags;
61 	struct qla_hw_data *ha = rsp->hw;
62 	local_irq_save(flags);
63 	if (IS_P3P_TYPE(ha))
64 		qla82xx_poll(0, rsp);
65 	else
66 		ha->isp_ops->intr_handler(0, rsp);
67 	local_irq_restore(flags);
68 }
69 
70 static inline uint8_t *
71 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
72 {
73        uint32_t *ifcp = (uint32_t *) fcp;
74        uint32_t *ofcp = (uint32_t *) fcp;
75        uint32_t iter = bsize >> 2;
76 
77        for (; iter ; iter--)
78                *ofcp++ = swab32(*ifcp++);
79 
80        return fcp;
81 }
82 
83 static inline void
84 host_to_adap(uint8_t *src, uint8_t *dst, uint32_t bsize)
85 {
86 	uint32_t *isrc = (uint32_t *) src;
87 	__le32 *odest = (__le32 *) dst;
88 	uint32_t iter = bsize >> 2;
89 
90 	for ( ; iter--; isrc++)
91 		*odest++ = cpu_to_le32(*isrc);
92 }
93 
94 static inline void
95 qla2x00_set_reserved_loop_ids(struct qla_hw_data *ha)
96 {
97 	int i;
98 
99 	if (IS_FWI2_CAPABLE(ha))
100 		return;
101 
102 	for (i = 0; i < SNS_FIRST_LOOP_ID; i++)
103 		set_bit(i, ha->loop_id_map);
104 	set_bit(MANAGEMENT_SERVER, ha->loop_id_map);
105 	set_bit(BROADCAST, ha->loop_id_map);
106 }
107 
108 static inline int
109 qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id)
110 {
111 	struct qla_hw_data *ha = vha->hw;
112 	if (IS_FWI2_CAPABLE(ha))
113 		return (loop_id > NPH_LAST_HANDLE);
114 
115 	return ((loop_id > ha->max_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
116 	    loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
117 }
118 
119 static inline void
120 qla2x00_clear_loop_id(fc_port_t *fcport) {
121 	struct qla_hw_data *ha = fcport->vha->hw;
122 
123 	if (fcport->loop_id == FC_NO_LOOP_ID ||
124 	    qla2x00_is_reserved_id(fcport->vha, fcport->loop_id))
125 		return;
126 
127 	clear_bit(fcport->loop_id, ha->loop_id_map);
128 	fcport->loop_id = FC_NO_LOOP_ID;
129 }
130 
131 static inline void
132 qla2x00_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx)
133 {
134 	struct dsd_dma *dsd, *tdsd;
135 
136 	/* clean up allocated prev pool */
137 	list_for_each_entry_safe(dsd, tdsd, &ctx->dsd_list, list) {
138 		dma_pool_free(ha->dl_dma_pool, dsd->dsd_addr,
139 		    dsd->dsd_list_dma);
140 		list_del(&dsd->list);
141 		kfree(dsd);
142 	}
143 	INIT_LIST_HEAD(&ctx->dsd_list);
144 }
145 
146 static inline void
147 qla2x00_set_fcport_state(fc_port_t *fcport, int state)
148 {
149 	int old_state;
150 
151 	old_state = atomic_read(&fcport->state);
152 	atomic_set(&fcport->state, state);
153 
154 	/* Don't print state transitions during initial allocation of fcport */
155 	if (old_state && old_state != state) {
156 		ql_dbg(ql_dbg_disc, fcport->vha, 0x207d,
157 		    "FCPort %8phC state transitioned from %s to %s - "
158 			"portid=%02x%02x%02x.\n", fcport->port_name,
159 		    port_state_str[old_state], port_state_str[state],
160 		    fcport->d_id.b.domain, fcport->d_id.b.area,
161 		    fcport->d_id.b.al_pa);
162 	}
163 }
164 
165 static inline int
166 qla2x00_hba_err_chk_enabled(srb_t *sp)
167 {
168 	/*
169 	 * Uncomment when corresponding SCSI changes are done.
170 	 *
171 	if (!sp->cmd->prot_chk)
172 		return 0;
173 	 *
174 	 */
175 	switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
176 	case SCSI_PROT_READ_STRIP:
177 	case SCSI_PROT_WRITE_INSERT:
178 		if (ql2xenablehba_err_chk >= 1)
179 			return 1;
180 		break;
181 	case SCSI_PROT_READ_PASS:
182 	case SCSI_PROT_WRITE_PASS:
183 		if (ql2xenablehba_err_chk >= 2)
184 			return 1;
185 		break;
186 	case SCSI_PROT_READ_INSERT:
187 	case SCSI_PROT_WRITE_STRIP:
188 		return 1;
189 	}
190 	return 0;
191 }
192 
193 static inline int
194 qla2x00_reset_active(scsi_qla_host_t *vha)
195 {
196 	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
197 
198 	/* Test appropriate base-vha and vha flags. */
199 	return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
200 	    test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
201 	    test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
202 	    test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
203 	    test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
204 }
205 
206 static inline srb_t *
207 qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
208 {
209 	srb_t *sp = NULL;
210 	uint8_t bail;
211 
212 	QLA_QPAIR_MARK_BUSY(qpair, bail);
213 	if (unlikely(bail))
214 		return NULL;
215 
216 	sp = mempool_alloc(qpair->srb_mempool, flag);
217 	if (!sp)
218 		goto done;
219 
220 	memset(sp, 0, sizeof(*sp));
221 	sp->fcport = fcport;
222 	sp->iocbs = 1;
223 	sp->vha = qpair->vha;
224 done:
225 	if (!sp)
226 		QLA_QPAIR_MARK_NOT_BUSY(qpair);
227 	return sp;
228 }
229 
230 static inline void
231 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
232 {
233 	mempool_free(sp, qpair->srb_mempool);
234 	QLA_QPAIR_MARK_NOT_BUSY(qpair);
235 }
236 
237 static inline srb_t *
238 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
239 {
240 	srb_t *sp = NULL;
241 	uint8_t bail;
242 
243 	QLA_VHA_MARK_BUSY(vha, bail);
244 	if (unlikely(bail))
245 		return NULL;
246 
247 	sp = mempool_alloc(vha->hw->srb_mempool, flag);
248 	if (!sp)
249 		goto done;
250 
251 	memset(sp, 0, sizeof(*sp));
252 	sp->fcport = fcport;
253 	sp->cmd_type = TYPE_SRB;
254 	sp->iocbs = 1;
255 	sp->vha = vha;
256 done:
257 	if (!sp)
258 		QLA_VHA_MARK_NOT_BUSY(vha);
259 	return sp;
260 }
261 
262 static inline void
263 qla2x00_rel_sp(srb_t *sp)
264 {
265 	QLA_VHA_MARK_NOT_BUSY(sp->vha);
266 	mempool_free(sp, sp->vha->hw->srb_mempool);
267 }
268 
269 static inline void
270 qla2x00_init_timer(srb_t *sp, unsigned long tmo)
271 {
272 	init_timer(&sp->u.iocb_cmd.timer);
273 	sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
274 	sp->u.iocb_cmd.timer.data = (unsigned long)sp;
275 	sp->u.iocb_cmd.timer.function = qla2x00_sp_timeout;
276 	add_timer(&sp->u.iocb_cmd.timer);
277 	sp->free = qla2x00_sp_free;
278 	if (IS_QLAFX00(sp->vha->hw) && (sp->type == SRB_FXIOCB_DCMD))
279 		init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
280 	if (sp->type == SRB_ELS_DCMD)
281 		init_completion(&sp->u.iocb_cmd.u.els_logo.comp);
282 }
283 
284 static inline int
285 qla2x00_gid_list_size(struct qla_hw_data *ha)
286 {
287 	if (IS_QLAFX00(ha))
288 		return sizeof(uint32_t) * 32;
289 	else
290 		return sizeof(struct gid_list_info) * ha->max_fibre_devices;
291 }
292 
293 static inline void
294 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
295 {
296 	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
297 	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
298 		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
299 		clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
300 		complete(&ha->mbx_intr_comp);
301 	}
302 }
303 
304 static inline void
305 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
306 {
307 	if (retry_delay)
308 		fcport->retry_delay_timestamp = jiffies +
309 		    (retry_delay * HZ / 10);
310 }
311 
312 static inline bool
313 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
314 {
315 	if (qla_ini_mode_enabled(vha) &&
316 	    (ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
317 		return true;
318 	else if (qla_tgt_mode_enabled(vha) &&
319 	    (ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
320 		return true;
321 	else if (qla_dual_mode_enabled(vha) &&
322 	    ((ql2xiniexchg + ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
323 		return true;
324 	else
325 		return false;
326 }
327 
328 static inline void
329 qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
330 {
331 	qpair->cpuid = cpuid;
332 
333 	if (!list_empty(&qpair->hints_list)) {
334 		struct qla_qpair_hint *h;
335 
336 		list_for_each_entry(h, &qpair->hints_list, hint_elem)
337 			h->cpuid = qpair->cpuid;
338 	}
339 }
340 
341 static inline struct qla_qpair_hint *
342 qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
343 {
344 	struct qla_qpair_hint *h;
345 	u16 i;
346 
347 	for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
348 		h = &tgt->qphints[i];
349 		if (h->qpair == qpair)
350 			return h;
351 	}
352 
353 	return NULL;
354 }
355 
356 static inline void
357 qla_83xx_start_iocbs(struct qla_qpair *qpair)
358 {
359 	struct req_que *req = qpair->req;
360 
361 	req->ring_index++;
362 	if (req->ring_index == req->length) {
363 		req->ring_index = 0;
364 		req->ring_ptr = req->ring;
365 	} else
366 		req->ring_ptr++;
367 
368 	WRT_REG_DWORD(req->req_q_in, req->ring_index);
369 }
370