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 */
17static inline uint16_t
18qla24xx_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 */
41static __inline__ uint16_t
42qla2x00_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
57static inline void
58qla2x00_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
70static inline uint8_t *
71host_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
83static inline void
84host_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 ; iter--)
91		*odest++ = cpu_to_le32(*isrc++);
92}
93
94static inline void
95qla2x00_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
108static inline int
109qla2x00_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
119static inline void
120qla2x00_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
131static inline void
132qla2x00_clean_dsd_pool(struct qla_hw_data *ha, srb_t *sp,
133	struct qla_tgt_cmd *tc)
134{
135	struct dsd_dma *dsd_ptr, *tdsd_ptr;
136	struct crc_context *ctx;
137
138	if (sp)
139		ctx = (struct crc_context *)GET_CMD_CTX_SP(sp);
140	else if (tc)
141		ctx = (struct crc_context *)tc->ctx;
142	else {
143		BUG();
144		return;
145	}
146
147	/* clean up allocated prev pool */
148	list_for_each_entry_safe(dsd_ptr, tdsd_ptr,
149	    &ctx->dsd_list, list) {
150		dma_pool_free(ha->dl_dma_pool, dsd_ptr->dsd_addr,
151		    dsd_ptr->dsd_list_dma);
152		list_del(&dsd_ptr->list);
153		kfree(dsd_ptr);
154	}
155	INIT_LIST_HEAD(&ctx->dsd_list);
156}
157
158static inline void
159qla2x00_set_fcport_state(fc_port_t *fcport, int state)
160{
161	int old_state;
162
163	old_state = atomic_read(&fcport->state);
164	atomic_set(&fcport->state, state);
165
166	/* Don't print state transitions during initial allocation of fcport */
167	if (old_state && old_state != state) {
168		ql_dbg(ql_dbg_disc, fcport->vha, 0x207d,
169		    "FCPort state transitioned from %s to %s - "
170		    "portid=%02x%02x%02x.\n",
171		    port_state_str[old_state], port_state_str[state],
172		    fcport->d_id.b.domain, fcport->d_id.b.area,
173		    fcport->d_id.b.al_pa);
174	}
175}
176
177static inline int
178qla2x00_hba_err_chk_enabled(srb_t *sp)
179{
180	/*
181	 * Uncomment when corresponding SCSI changes are done.
182	 *
183	if (!sp->cmd->prot_chk)
184		return 0;
185	 *
186	 */
187	switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
188	case SCSI_PROT_READ_STRIP:
189	case SCSI_PROT_WRITE_INSERT:
190		if (ql2xenablehba_err_chk >= 1)
191			return 1;
192		break;
193	case SCSI_PROT_READ_PASS:
194	case SCSI_PROT_WRITE_PASS:
195		if (ql2xenablehba_err_chk >= 2)
196			return 1;
197		break;
198	case SCSI_PROT_READ_INSERT:
199	case SCSI_PROT_WRITE_STRIP:
200		return 1;
201	}
202	return 0;
203}
204
205static inline int
206qla2x00_reset_active(scsi_qla_host_t *vha)
207{
208	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
209
210	/* Test appropriate base-vha and vha flags. */
211	return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
212	    test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
213	    test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
214	    test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
215	    test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
216}
217
218static inline srb_t *
219qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
220{
221	srb_t *sp = NULL;
222	struct qla_hw_data *ha = vha->hw;
223	uint8_t bail;
224
225	QLA_VHA_MARK_BUSY(vha, bail);
226	if (unlikely(bail))
227		return NULL;
228
229	sp = mempool_alloc(ha->srb_mempool, flag);
230	if (!sp)
231		goto done;
232
233	memset(sp, 0, sizeof(*sp));
234	sp->fcport = fcport;
235	sp->iocbs = 1;
236done:
237	if (!sp)
238		QLA_VHA_MARK_NOT_BUSY(vha);
239	return sp;
240}
241
242static inline void
243qla2x00_rel_sp(scsi_qla_host_t *vha, srb_t *sp)
244{
245	mempool_free(sp, vha->hw->srb_mempool);
246	QLA_VHA_MARK_NOT_BUSY(vha);
247}
248
249static inline void
250qla2x00_init_timer(srb_t *sp, unsigned long tmo)
251{
252	init_timer(&sp->u.iocb_cmd.timer);
253	sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
254	sp->u.iocb_cmd.timer.data = (unsigned long)sp;
255	sp->u.iocb_cmd.timer.function = qla2x00_sp_timeout;
256	add_timer(&sp->u.iocb_cmd.timer);
257	sp->free = qla2x00_sp_free;
258	if ((IS_QLAFX00(sp->fcport->vha->hw)) &&
259	    (sp->type == SRB_FXIOCB_DCMD))
260		init_completion(&sp->u.iocb_cmd.u.fxiocb.fxiocb_comp);
261}
262
263static inline int
264qla2x00_gid_list_size(struct qla_hw_data *ha)
265{
266	if (IS_QLAFX00(ha))
267		return sizeof(uint32_t) * 32;
268	else
269		return sizeof(struct gid_list_info) * ha->max_fibre_devices;
270}
271
272static inline void
273qla2x00_handle_mbx_completion(struct qla_hw_data *ha, int status)
274{
275	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
276	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
277		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
278		clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
279		complete(&ha->mbx_intr_comp);
280	}
281}
282
283static inline void
284qla2x00_set_retry_delay_timestamp(fc_port_t *fcport, uint16_t retry_delay)
285{
286	if (retry_delay)
287		fcport->retry_delay_timestamp = jiffies +
288		    (retry_delay * HZ / 10);
289}
290