1/*
2 * QLogic Fibre Channel HBA Driver
3 * Copyright (c)  2003-2011 QLogic Corporation
4 *
5 * See LICENSE.qla2xxx for copyright and licensing details.
6 */
7
8/*
9 * qla2x00_debounce_register
10 *      Debounce register.
11 *
12 * Input:
13 *      port = register address.
14 *
15 * Returns:
16 *      register value.
17 */
18static __inline__ uint16_t
19qla2x00_debounce_register(volatile uint16_t __iomem *addr)
20{
21	volatile uint16_t first;
22	volatile uint16_t second;
23
24	do {
25		first = RD_REG_WORD(addr);
26		barrier();
27		cpu_relax();
28		second = RD_REG_WORD(addr);
29	} while (first != second);
30
31	return (first);
32}
33
34static inline void
35qla2x00_poll(struct rsp_que *rsp)
36{
37	unsigned long flags;
38	struct qla_hw_data *ha = rsp->hw;
39	local_irq_save(flags);
40	if (IS_QLA82XX(ha))
41		qla82xx_poll(0, rsp);
42	else
43		ha->isp_ops->intr_handler(0, rsp);
44	local_irq_restore(flags);
45}
46
47static inline uint8_t *
48host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)
49{
50       uint32_t *ifcp = (uint32_t *) fcp;
51       uint32_t *ofcp = (uint32_t *) fcp;
52       uint32_t iter = bsize >> 2;
53
54       for (; iter ; iter--)
55               *ofcp++ = swab32(*ifcp++);
56
57       return fcp;
58}
59
60static inline int
61qla2x00_is_reserved_id(scsi_qla_host_t *vha, uint16_t loop_id)
62{
63	struct qla_hw_data *ha = vha->hw;
64	if (IS_FWI2_CAPABLE(ha))
65		return (loop_id > NPH_LAST_HANDLE);
66
67	return ((loop_id > ha->max_loop_id && loop_id < SNS_FIRST_LOOP_ID) ||
68	    loop_id == MANAGEMENT_SERVER || loop_id == BROADCAST);
69}
70
71static inline void
72qla2x00_clean_dsd_pool(struct qla_hw_data *ha, srb_t *sp)
73{
74	struct dsd_dma *dsd_ptr, *tdsd_ptr;
75	struct crc_context *ctx;
76
77	ctx = (struct crc_context *)GET_CMD_CTX_SP(sp);
78
79	/* clean up allocated prev pool */
80	list_for_each_entry_safe(dsd_ptr, tdsd_ptr,
81	    &ctx->dsd_list, list) {
82		dma_pool_free(ha->dl_dma_pool, dsd_ptr->dsd_addr,
83		    dsd_ptr->dsd_list_dma);
84		list_del(&dsd_ptr->list);
85		kfree(dsd_ptr);
86	}
87	INIT_LIST_HEAD(&ctx->dsd_list);
88}
89
90static inline void
91qla2x00_set_fcport_state(fc_port_t *fcport, int state)
92{
93	int old_state;
94
95	old_state = atomic_read(&fcport->state);
96	atomic_set(&fcport->state, state);
97
98	/* Don't print state transitions during initial allocation of fcport */
99	if (old_state && old_state != state) {
100		ql_dbg(ql_dbg_disc, fcport->vha, 0x207d,
101		    "FCPort state transitioned from %s to %s - "
102		    "portid=%02x%02x%02x.\n",
103		    port_state_str[old_state], port_state_str[state],
104		    fcport->d_id.b.domain, fcport->d_id.b.area,
105		    fcport->d_id.b.al_pa);
106	}
107}
108
109static inline int
110qla2x00_hba_err_chk_enabled(srb_t *sp)
111{
112	/*
113	 * Uncomment when corresponding SCSI changes are done.
114	 *
115	if (!sp->cmd->prot_chk)
116		return 0;
117	 *
118	 */
119	switch (scsi_get_prot_op(GET_CMD_SP(sp))) {
120	case SCSI_PROT_READ_STRIP:
121	case SCSI_PROT_WRITE_INSERT:
122		if (ql2xenablehba_err_chk >= 1)
123			return 1;
124		break;
125	case SCSI_PROT_READ_PASS:
126	case SCSI_PROT_WRITE_PASS:
127		if (ql2xenablehba_err_chk >= 2)
128			return 1;
129		break;
130	case SCSI_PROT_READ_INSERT:
131	case SCSI_PROT_WRITE_STRIP:
132		return 1;
133	}
134	return 0;
135}
136
137static inline int
138qla2x00_reset_active(scsi_qla_host_t *vha)
139{
140	scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
141
142	/* Test appropriate base-vha and vha flags. */
143	return test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags) ||
144	    test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
145	    test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
146	    test_bit(ISP_ABORT_NEEDED, &vha->dpc_flags) ||
147	    test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
148}
149
150static inline srb_t *
151qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
152{
153	srb_t *sp = NULL;
154	struct qla_hw_data *ha = vha->hw;
155	uint8_t bail;
156
157	QLA_VHA_MARK_BUSY(vha, bail);
158	if (unlikely(bail))
159		return NULL;
160
161	sp = mempool_alloc(ha->srb_mempool, flag);
162	if (!sp)
163		goto done;
164
165	memset(sp, 0, sizeof(*sp));
166	sp->fcport = fcport;
167	sp->iocbs = 1;
168done:
169	if (!sp)
170		QLA_VHA_MARK_NOT_BUSY(vha);
171	return sp;
172}
173
174static inline void
175qla2x00_init_timer(srb_t *sp, unsigned long tmo)
176{
177	init_timer(&sp->u.iocb_cmd.timer);
178	sp->u.iocb_cmd.timer.expires = jiffies + tmo * HZ;
179	sp->u.iocb_cmd.timer.data = (unsigned long)sp;
180	sp->u.iocb_cmd.timer.function = qla2x00_sp_timeout;
181	add_timer(&sp->u.iocb_cmd.timer);
182	sp->free = qla2x00_sp_free;
183}
184
185static inline int
186qla2x00_gid_list_size(struct qla_hw_data *ha)
187{
188	return sizeof(struct gid_list_info) * ha->max_fibre_devices;
189}
190