xref: /linux/drivers/scsi/qla2xxx/qla_inline.h (revision 48dea9a700c8728cc31a1dd44588b97578de86ee) 
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  * @vha: HA context
14  * @dsds: number of data segment descriptors needed
15  *
16  * Returns the number of IOCB entries needed to store @dsds.
17  */
18 static inline uint16_t
19 qla24xx_calc_iocbs(scsi_qla_host_t *vha, uint16_t dsds)
20 {
21 	uint16_t iocbs;
22 
23 	iocbs = 1;
24 	if (dsds > 1) {
25 		iocbs += (dsds - 1) / 5;
26 		if ((dsds - 1) % 5)
27 			iocbs++;
28 	}
29 	return iocbs;
30 }
31 
32 /*
33  * qla2x00_debounce_register
34  *      Debounce register.
35  *
36  * Input:
37  *      port = register address.
38  *
39  * Returns:
40  *      register value.
41  */
42 static __inline__ uint16_t
43 qla2x00_debounce_register(volatile __le16 __iomem *addr)
44 {
45 	volatile uint16_t first;
46 	volatile uint16_t second;
47 
48 	do {
49 		first = rd_reg_word(addr);
50 		barrier();
51 		cpu_relax();
52 		second = rd_reg_word(addr);
53 	} while (first != second);
54 
55 	return (first);
56 }
57 
58 static inline void
59 qla2x00_poll(struct rsp_que *rsp)
60 {
61 	struct qla_hw_data *ha = rsp->hw;
62 
63 	if (IS_P3P_TYPE(ha))
64 		qla82xx_poll(0, rsp);
65 	else
66 		ha->isp_ops->intr_handler(0, rsp);
67 }
68 
69 static inline uint8_t *
70 host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
71 {
72        uint32_t *ifcp = (uint32_t *) fcp;
73        uint32_t *ofcp = (uint32_t *) fcp;
74        uint32_t iter = bsize >> 2;
75 
76        for (; iter ; iter--)
77                *ofcp++ = swab32(*ifcp++);
78 
79        return fcp;
80 }
81 
82 static inline void
83 host_to_adap(uint8_t *src, uint8_t *dst, uint32_t bsize)
84 {
85 	uint32_t *isrc = (uint32_t *) src;
86 	__le32 *odest = (__le32 *) dst;
87 	uint32_t iter = bsize >> 2;
88 
89 	for ( ; iter--; isrc++)
90 		*odest++ = cpu_to_le32(*isrc);
91 }
92 
93 static inline void
94 qla2x00_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx)
95 {
96 	struct dsd_dma *dsd, *tdsd;
97 
98 	/* clean up allocated prev pool */
99 	list_for_each_entry_safe(dsd, tdsd, &ctx->dsd_list, list) {
100 		dma_pool_free(ha->dl_dma_pool, dsd->dsd_addr,
101 		    dsd->dsd_list_dma);
102 		list_del(&dsd->list);
103 		kfree(dsd);
104 	}
105 	INIT_LIST_HEAD(&ctx->dsd_list);
106 }
107 
108 static inline void
109 qla2x00_set_fcport_disc_state(fc_port_t *fcport, int state)
110 {
111 	int old_val;
112 	uint8_t shiftbits, mask;
113 
114 	/* This will have to change when the max no. of states > 16 */
115 	shiftbits = 4;
116 	mask = (1 << shiftbits) - 1;
117 
118 	fcport->disc_state = state;
119 	while (1) {
120 		old_val = atomic_read(&fcport->shadow_disc_state);
121 		if (old_val == atomic_cmpxchg(&fcport->shadow_disc_state,
122 		    old_val, (old_val << shiftbits) | state)) {
123 			ql_dbg(ql_dbg_disc, fcport->vha, 0x2134,
124 			    "FCPort %8phC disc_state transition: %s to %s - portid=%06x.\n",
125 			    fcport->port_name, port_dstate_str[old_val & mask],
126 			    port_dstate_str[state], fcport->d_id.b24);
127 			return;
128 		}
129 	}
130 }
131 
132 static inline int
133 qla2x00_hba_err_chk_enabled(srb_t *sp)
134 {
135 	/*
136 	 * Uncomment when corresponding SCSI changes are done.
137 	 *
138 	if (!sp->cmd->prot_chk)
139 		return 0;
140 	 *
141 	 */
142 	switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
143 	case SCSI_PROT_READ_STRIP:
144 	case SCSI_PROT_WRITE_INSERT:
145 		if (ql2xenablehba_err_chk >= 1)
146 			return 1;
147 		break;
148 	case SCSI_PROT_READ_PASS:
149 	case SCSI_PROT_WRITE_PASS:
150 		if (ql2xenablehba_err_chk >= 2)
151 			return 1;
152 		break;
153 	case SCSI_PROT_READ_INSERT:
154 	case SCSI_PROT_WRITE_STRIP:
155 		return 1;
156 	}
157 	return 0;
158 }
159 
160 static inline int
161 qla2x00_reset_active(scsi_qla_host_t *vha)
162 {
163 	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
164 
165 	/* Test appropriate base-vha and vha flags. */
166 	return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
167 	    test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
168 	    test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
169 	    test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
170 	    test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
171 }
172 
173 static inline int
174 qla2x00_chip_is_down(scsi_qla_host_t *vha)
175 {
176 	return (qla2x00_reset_active(vha) || !vha->hw->flags.fw_started);
177 }
178 
179 static void qla2xxx_init_sp(srb_t *sp, scsi_qla_host_t *vha,
180 			    struct qla_qpair *qpair, fc_port_t *fcport)
181 {
182 	memset(sp, 0, sizeof(*sp));
183 	sp->fcport = fcport;
184 	sp->iocbs = 1;
185 	sp->vha = vha;
186 	sp->qpair = qpair;
187 	sp->cmd_type = TYPE_SRB;
188 	INIT_LIST_HEAD(&sp->elem);
189 }
190 
191 static inline srb_t *
192 qla2xxx_get_qpair_sp(scsi_qla_host_t *vha, struct qla_qpair *qpair,
193     fc_port_t *fcport, gfp_t flag)
194 {
195 	srb_t *sp = NULL;
196 	uint8_t bail;
197 
198 	QLA_QPAIR_MARK_BUSY(qpair, bail);
199 	if (unlikely(bail))
200 		return NULL;
201 
202 	sp = mempool_alloc(qpair->srb_mempool, flag);
203 	if (sp)
204 		qla2xxx_init_sp(sp, vha, qpair, fcport);
205 	else
206 		QLA_QPAIR_MARK_NOT_BUSY(qpair);
207 	return sp;
208 }
209 
210 static inline void
211 qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
212 {
213 	sp->qpair = NULL;
214 	mempool_free(sp, qpair->srb_mempool);
215 	QLA_QPAIR_MARK_NOT_BUSY(qpair);
216 }
217 
218 static inline srb_t *
219 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
220 {
221 	srb_t *sp = NULL;
222 	uint8_t bail;
223 	struct qla_qpair *qpair;
224 
225 	QLA_VHA_MARK_BUSY(vha, bail);
226 	if (unlikely(bail))
227 		return NULL;
228 
229 	qpair = vha->hw->base_qpair;
230 	sp = qla2xxx_get_qpair_sp(vha, qpair, fcport, flag);
231 	if (!sp)
232 		goto done;
233 
234 	sp->vha = vha;
235 done:
236 	if (!sp)
237 		QLA_VHA_MARK_NOT_BUSY(vha);
238 	return sp;
239 }
240 
241 static inline void
242 qla2x00_rel_sp(srb_t *sp)
243 {
244 	QLA_VHA_MARK_NOT_BUSY(sp->vha);
245 	qla2xxx_rel_qpair_sp(sp->qpair, sp);
246 }
247 
248 static inline int
249 qla2x00_gid_list_size(struct qla_hw_data *ha)
250 {
251 	if (IS_QLAFX00(ha))
252 		return sizeof(uint32_t) * 32;
253 	else
254 		return sizeof(struct gid_list_info) * ha->max_fibre_devices;
255 }
256 
257 static inline void
258 qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
259 {
260 	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
261 	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
262 		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
263 		clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
264 		complete(&ha->mbx_intr_comp);
265 	}
266 }
267 
268 static inline void
269 qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
270 {
271 	if (retry_delay)
272 		fcport->retry_delay_timestamp = jiffies +
273 		    (retry_delay * HZ / 10);
274 }
275 
276 static inline bool
277 qla_is_exch_offld_enabled(struct scsi_qla_host *vha)
278 {
279 	if (qla_ini_mode_enabled(vha) &&
280 	    (vha->ql2xiniexchg > FW_DEF_EXCHANGES_CNT))
281 		return true;
282 	else if (qla_tgt_mode_enabled(vha) &&
283 	    (vha->ql2xexchoffld > FW_DEF_EXCHANGES_CNT))
284 		return true;
285 	else if (qla_dual_mode_enabled(vha) &&
286 	    ((vha->ql2xiniexchg + vha->ql2xexchoffld) > FW_DEF_EXCHANGES_CNT))
287 		return true;
288 	else
289 		return false;
290 }
291 
292 static inline void
293 qla_cpu_update(struct qla_qpair *qpair, uint16_t cpuid)
294 {
295 	qpair->cpuid = cpuid;
296 
297 	if (!list_empty(&qpair->hints_list)) {
298 		struct qla_qpair_hint *h;
299 
300 		list_for_each_entry(h, &qpair->hints_list, hint_elem)
301 			h->cpuid = qpair->cpuid;
302 	}
303 }
304 
305 static inline struct qla_qpair_hint *
306 qla_qpair_to_hint(struct qla_tgt *tgt, struct qla_qpair *qpair)
307 {
308 	struct qla_qpair_hint *h;
309 	u16 i;
310 
311 	for (i = 0; i < tgt->ha->max_qpairs + 1; i++) {
312 		h = &tgt->qphints[i];
313 		if (h->qpair == qpair)
314 			return h;
315 	}
316 
317 	return NULL;
318 }
319 
320 static inline void
321 qla_83xx_start_iocbs(struct qla_qpair *qpair)
322 {
323 	struct req_que *req = qpair->req;
324 
325 	req->ring_index++;
326 	if (req->ring_index == req->length) {
327 		req->ring_index = 0;
328 		req->ring_ptr = req->ring;
329 	} else
330 		req->ring_ptr++;
331 
332 	wrt_reg_dword(req->req_q_in, req->ring_index);
333 }
334 
335 static inline int
336 qla2xxx_get_fc4_priority(struct scsi_qla_host *vha)
337 {
338 	uint32_t data;
339 
340 	data =
341 	    ((uint8_t *)vha->hw->nvram)[NVRAM_DUAL_FCP_NVME_FLAG_OFFSET];
342 
343 
344 	return (data >> 6) & BIT_0 ? FC4_PRIORITY_FCP : FC4_PRIORITY_NVME;
345 }
346