1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
4 * Copyright (c) 2014- QLogic Corporation.
5 * All rights reserved
6 * www.qlogic.com
7 *
8 * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
9 */
10
11#include "bfad_drv.h"
12#include "bfa_ioc.h"
13#include "bfi_reg.h"
14#include "bfa_defs.h"
15
16BFA_TRC_FILE(CNA, IOC_CB);
17
18#define bfa_ioc_cb_join_pos(__ioc) ((u32) (1 << BFA_IOC_CB_JOIN_SH))
19
20/*
21 * forward declarations
22 */
23static bfa_boolean_t bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc);
24static void bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc);
25static void bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc);
26static void bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc);
27static void bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix);
28static void bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc);
29static void bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc);
30static bfa_boolean_t bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc);
31static void bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc);
32static void bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc);
33static void bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc);
34static bfa_boolean_t bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc);
35static void bfa_ioc_cb_set_cur_ioc_fwstate(
36 struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
37static enum bfi_ioc_state bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc);
38static void bfa_ioc_cb_set_alt_ioc_fwstate(
39 struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
40static enum bfi_ioc_state bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc);
41
42static struct bfa_ioc_hwif_s hwif_cb;
43
44/*
45 * Called from bfa_ioc_attach() to map asic specific calls.
46 */
47void
48bfa_ioc_set_cb_hwif(struct bfa_ioc_s *ioc)
49{
50 hwif_cb.ioc_pll_init = bfa_ioc_cb_pll_init;
51 hwif_cb.ioc_firmware_lock = bfa_ioc_cb_firmware_lock;
52 hwif_cb.ioc_firmware_unlock = bfa_ioc_cb_firmware_unlock;
53 hwif_cb.ioc_reg_init = bfa_ioc_cb_reg_init;
54 hwif_cb.ioc_map_port = bfa_ioc_cb_map_port;
55 hwif_cb.ioc_isr_mode_set = bfa_ioc_cb_isr_mode_set;
56 hwif_cb.ioc_notify_fail = bfa_ioc_cb_notify_fail;
57 hwif_cb.ioc_ownership_reset = bfa_ioc_cb_ownership_reset;
58 hwif_cb.ioc_sync_start = bfa_ioc_cb_sync_start;
59 hwif_cb.ioc_sync_join = bfa_ioc_cb_sync_join;
60 hwif_cb.ioc_sync_leave = bfa_ioc_cb_sync_leave;
61 hwif_cb.ioc_sync_ack = bfa_ioc_cb_sync_ack;
62 hwif_cb.ioc_sync_complete = bfa_ioc_cb_sync_complete;
63 hwif_cb.ioc_set_fwstate = bfa_ioc_cb_set_cur_ioc_fwstate;
64 hwif_cb.ioc_get_fwstate = bfa_ioc_cb_get_cur_ioc_fwstate;
65 hwif_cb.ioc_set_alt_fwstate = bfa_ioc_cb_set_alt_ioc_fwstate;
66 hwif_cb.ioc_get_alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate;
67
68 ioc->ioc_hwif = &hwif_cb;
69}
70
71/*
72 * Return true if firmware of current driver matches the running firmware.
73 */
74static bfa_boolean_t
75bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc)
76{
77 enum bfi_ioc_state alt_fwstate, cur_fwstate;
78 struct bfi_ioc_image_hdr_s fwhdr;
79
80 cur_fwstate = bfa_ioc_cb_get_cur_ioc_fwstate(ioc);
81 bfa_trc(ioc, cur_fwstate);
82 alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate(ioc);
83 bfa_trc(ioc, alt_fwstate);
84
85 /*
86 * Uninit implies this is the only driver as of now.
87 */
88 if (cur_fwstate == BFI_IOC_UNINIT)
89 return BFA_TRUE;
90 /*
91 * Check if another driver with a different firmware is active
92 */
93 bfa_ioc_fwver_get(ioc, fwhdr: &fwhdr);
94 if (!bfa_ioc_fwver_cmp(ioc, fwhdr: &fwhdr) &&
95 alt_fwstate != BFI_IOC_DISABLED) {
96 bfa_trc(ioc, alt_fwstate);
97 return BFA_FALSE;
98 }
99
100 return BFA_TRUE;
101}
102
103static void
104bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc)
105{
106}
107
108/*
109 * Notify other functions on HB failure.
110 */
111static void
112bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc)
113{
114 writel(val: ~0U, addr: ioc->ioc_regs.err_set);
115 readl(addr: ioc->ioc_regs.err_set);
116}
117
118/*
119 * Host to LPU mailbox message addresses
120 */
121static struct { u32 hfn_mbox, lpu_mbox, hfn_pgn; } iocreg_fnreg[] = {
122 { HOSTFN0_LPU_MBOX0_0, LPU_HOSTFN0_MBOX0_0, HOST_PAGE_NUM_FN0 },
123 { HOSTFN1_LPU_MBOX0_8, LPU_HOSTFN1_MBOX0_8, HOST_PAGE_NUM_FN1 }
124};
125
126/*
127 * Host <-> LPU mailbox command/status registers
128 */
129static struct { u32 hfn, lpu; } iocreg_mbcmd[] = {
130
131 { HOSTFN0_LPU0_CMD_STAT, LPU0_HOSTFN0_CMD_STAT },
132 { HOSTFN1_LPU1_CMD_STAT, LPU1_HOSTFN1_CMD_STAT }
133};
134
135static void
136bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc)
137{
138 void __iomem *rb;
139 int pcifn = bfa_ioc_pcifn(ioc);
140
141 rb = bfa_ioc_bar0(ioc);
142
143 ioc->ioc_regs.hfn_mbox = rb + iocreg_fnreg[pcifn].hfn_mbox;
144 ioc->ioc_regs.lpu_mbox = rb + iocreg_fnreg[pcifn].lpu_mbox;
145 ioc->ioc_regs.host_page_num_fn = rb + iocreg_fnreg[pcifn].hfn_pgn;
146
147 if (ioc->port_id == 0) {
148 ioc->ioc_regs.heartbeat = rb + BFA_IOC0_HBEAT_REG;
149 ioc->ioc_regs.ioc_fwstate = rb + BFA_IOC0_STATE_REG;
150 ioc->ioc_regs.alt_ioc_fwstate = rb + BFA_IOC1_STATE_REG;
151 } else {
152 ioc->ioc_regs.heartbeat = (rb + BFA_IOC1_HBEAT_REG);
153 ioc->ioc_regs.ioc_fwstate = (rb + BFA_IOC1_STATE_REG);
154 ioc->ioc_regs.alt_ioc_fwstate = (rb + BFA_IOC0_STATE_REG);
155 }
156
157 /*
158 * Host <-> LPU mailbox command/status registers
159 */
160 ioc->ioc_regs.hfn_mbox_cmd = rb + iocreg_mbcmd[pcifn].hfn;
161 ioc->ioc_regs.lpu_mbox_cmd = rb + iocreg_mbcmd[pcifn].lpu;
162
163 /*
164 * PSS control registers
165 */
166 ioc->ioc_regs.pss_ctl_reg = (rb + PSS_CTL_REG);
167 ioc->ioc_regs.pss_err_status_reg = (rb + PSS_ERR_STATUS_REG);
168 ioc->ioc_regs.app_pll_fast_ctl_reg = (rb + APP_PLL_LCLK_CTL_REG);
169 ioc->ioc_regs.app_pll_slow_ctl_reg = (rb + APP_PLL_SCLK_CTL_REG);
170
171 /*
172 * IOC semaphore registers and serialization
173 */
174 ioc->ioc_regs.ioc_sem_reg = (rb + HOST_SEM0_REG);
175 ioc->ioc_regs.ioc_init_sem_reg = (rb + HOST_SEM2_REG);
176
177 /*
178 * sram memory access
179 */
180 ioc->ioc_regs.smem_page_start = (rb + PSS_SMEM_PAGE_START);
181 ioc->ioc_regs.smem_pg0 = BFI_IOC_SMEM_PG0_CB;
182
183 /*
184 * err set reg : for notification of hb failure
185 */
186 ioc->ioc_regs.err_set = (rb + ERR_SET_REG);
187}
188
189/*
190 * Initialize IOC to port mapping.
191 */
192
193static void
194bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc)
195{
196 /*
197 * For crossbow, port id is same as pci function.
198 */
199 ioc->port_id = bfa_ioc_pcifn(ioc);
200
201 bfa_trc(ioc, ioc->port_id);
202}
203
204/*
205 * Set interrupt mode for a function: INTX or MSIX
206 */
207static void
208bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix)
209{
210}
211
212/*
213 * Synchronized IOC failure processing routines
214 */
215static bfa_boolean_t
216bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc)
217{
218 u32 ioc_fwstate = readl(addr: ioc->ioc_regs.ioc_fwstate);
219
220 /**
221 * Driver load time. If the join bit is set,
222 * it is due to an unclean exit by the driver for this
223 * PCI fn in the previous incarnation. Whoever comes here first
224 * should clean it up, no matter which PCI fn.
225 */
226 if (ioc_fwstate & BFA_IOC_CB_JOIN_MASK) {
227 writel(val: BFI_IOC_UNINIT, addr: ioc->ioc_regs.ioc_fwstate);
228 writel(val: BFI_IOC_UNINIT, addr: ioc->ioc_regs.alt_ioc_fwstate);
229 return BFA_TRUE;
230 }
231
232 return bfa_ioc_cb_sync_complete(ioc);
233}
234
235/*
236 * Cleanup hw semaphore and usecnt registers
237 */
238static void
239bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc)
240{
241
242 /*
243 * Read the hw sem reg to make sure that it is locked
244 * before we clear it. If it is not locked, writing 1
245 * will lock it instead of clearing it.
246 */
247 readl(addr: ioc->ioc_regs.ioc_sem_reg);
248 writel(val: 1, addr: ioc->ioc_regs.ioc_sem_reg);
249}
250
251/*
252 * Synchronized IOC failure processing routines
253 */
254static void
255bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc)
256{
257 u32 r32 = readl(addr: ioc->ioc_regs.ioc_fwstate);
258 u32 join_pos = bfa_ioc_cb_join_pos(ioc);
259
260 writel(val: (r32 | join_pos), addr: ioc->ioc_regs.ioc_fwstate);
261}
262
263static void
264bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc)
265{
266 u32 r32 = readl(addr: ioc->ioc_regs.ioc_fwstate);
267 u32 join_pos = bfa_ioc_cb_join_pos(ioc);
268
269 writel(val: (r32 & ~join_pos), addr: ioc->ioc_regs.ioc_fwstate);
270}
271
272static void
273bfa_ioc_cb_set_cur_ioc_fwstate(struct bfa_ioc_s *ioc,
274 enum bfi_ioc_state fwstate)
275{
276 u32 r32 = readl(addr: ioc->ioc_regs.ioc_fwstate);
277
278 writel(val: (fwstate | (r32 & BFA_IOC_CB_JOIN_MASK)),
279 addr: ioc->ioc_regs.ioc_fwstate);
280}
281
282static enum bfi_ioc_state
283bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc)
284{
285 return (enum bfi_ioc_state)(readl(addr: ioc->ioc_regs.ioc_fwstate) &
286 BFA_IOC_CB_FWSTATE_MASK);
287}
288
289static void
290bfa_ioc_cb_set_alt_ioc_fwstate(struct bfa_ioc_s *ioc,
291 enum bfi_ioc_state fwstate)
292{
293 u32 r32 = readl(addr: ioc->ioc_regs.alt_ioc_fwstate);
294
295 writel(val: (fwstate | (r32 & BFA_IOC_CB_JOIN_MASK)),
296 addr: ioc->ioc_regs.alt_ioc_fwstate);
297}
298
299static enum bfi_ioc_state
300bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc)
301{
302 return (enum bfi_ioc_state)(readl(addr: ioc->ioc_regs.alt_ioc_fwstate) &
303 BFA_IOC_CB_FWSTATE_MASK);
304}
305
306static void
307bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc)
308{
309 bfa_ioc_cb_set_cur_ioc_fwstate(ioc, fwstate: BFI_IOC_FAIL);
310}
311
312static bfa_boolean_t
313bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc)
314{
315 u32 fwstate, alt_fwstate;
316 fwstate = bfa_ioc_cb_get_cur_ioc_fwstate(ioc);
317
318 /*
319 * At this point, this IOC is hoding the hw sem in the
320 * start path (fwcheck) OR in the disable/enable path
321 * OR to check if the other IOC has acknowledged failure.
322 *
323 * So, this IOC can be in UNINIT, INITING, DISABLED, FAIL
324 * or in MEMTEST states. In a normal scenario, this IOC
325 * can not be in OP state when this function is called.
326 *
327 * However, this IOC could still be in OP state when
328 * the OS driver is starting up, if the OptROM code has
329 * left it in that state.
330 *
331 * If we had marked this IOC's fwstate as BFI_IOC_FAIL
332 * in the failure case and now, if the fwstate is not
333 * BFI_IOC_FAIL it implies that the other PCI fn have
334 * reinitialized the ASIC or this IOC got disabled, so
335 * return TRUE.
336 */
337 if (fwstate == BFI_IOC_UNINIT ||
338 fwstate == BFI_IOC_INITING ||
339 fwstate == BFI_IOC_DISABLED ||
340 fwstate == BFI_IOC_MEMTEST ||
341 fwstate == BFI_IOC_OP)
342 return BFA_TRUE;
343 else {
344 alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate(ioc);
345 if (alt_fwstate == BFI_IOC_FAIL ||
346 alt_fwstate == BFI_IOC_DISABLED ||
347 alt_fwstate == BFI_IOC_UNINIT ||
348 alt_fwstate == BFI_IOC_INITING ||
349 alt_fwstate == BFI_IOC_MEMTEST)
350 return BFA_TRUE;
351 else
352 return BFA_FALSE;
353 }
354}
355
356bfa_status_t
357bfa_ioc_cb_pll_init(void __iomem *rb, enum bfi_asic_mode fcmode)
358{
359 u32 pll_sclk, pll_fclk, join_bits;
360
361 pll_sclk = __APP_PLL_SCLK_ENABLE | __APP_PLL_SCLK_LRESETN |
362 __APP_PLL_SCLK_P0_1(3U) |
363 __APP_PLL_SCLK_JITLMT0_1(3U) |
364 __APP_PLL_SCLK_CNTLMT0_1(3U);
365 pll_fclk = __APP_PLL_LCLK_ENABLE | __APP_PLL_LCLK_LRESETN |
366 __APP_PLL_LCLK_RSEL200500 | __APP_PLL_LCLK_P0_1(3U) |
367 __APP_PLL_LCLK_JITLMT0_1(3U) |
368 __APP_PLL_LCLK_CNTLMT0_1(3U);
369 join_bits = readl(addr: rb + BFA_IOC0_STATE_REG) &
370 BFA_IOC_CB_JOIN_MASK;
371 writel(val: (BFI_IOC_UNINIT | join_bits), addr: (rb + BFA_IOC0_STATE_REG));
372 join_bits = readl(addr: rb + BFA_IOC1_STATE_REG) &
373 BFA_IOC_CB_JOIN_MASK;
374 writel(val: (BFI_IOC_UNINIT | join_bits), addr: (rb + BFA_IOC1_STATE_REG));
375 writel(val: 0xffffffffU, addr: (rb + HOSTFN0_INT_MSK));
376 writel(val: 0xffffffffU, addr: (rb + HOSTFN1_INT_MSK));
377 writel(val: 0xffffffffU, addr: (rb + HOSTFN0_INT_STATUS));
378 writel(val: 0xffffffffU, addr: (rb + HOSTFN1_INT_STATUS));
379 writel(val: 0xffffffffU, addr: (rb + HOSTFN0_INT_MSK));
380 writel(val: 0xffffffffU, addr: (rb + HOSTFN1_INT_MSK));
381 writel(__APP_PLL_SCLK_LOGIC_SOFT_RESET, addr: rb + APP_PLL_SCLK_CTL_REG);
382 writel(__APP_PLL_SCLK_BYPASS | __APP_PLL_SCLK_LOGIC_SOFT_RESET,
383 addr: rb + APP_PLL_SCLK_CTL_REG);
384 writel(__APP_PLL_LCLK_LOGIC_SOFT_RESET, addr: rb + APP_PLL_LCLK_CTL_REG);
385 writel(__APP_PLL_LCLK_BYPASS | __APP_PLL_LCLK_LOGIC_SOFT_RESET,
386 addr: rb + APP_PLL_LCLK_CTL_REG);
387 udelay(2);
388 writel(__APP_PLL_SCLK_LOGIC_SOFT_RESET, addr: rb + APP_PLL_SCLK_CTL_REG);
389 writel(__APP_PLL_LCLK_LOGIC_SOFT_RESET, addr: rb + APP_PLL_LCLK_CTL_REG);
390 writel(val: pll_sclk | __APP_PLL_SCLK_LOGIC_SOFT_RESET,
391 addr: rb + APP_PLL_SCLK_CTL_REG);
392 writel(val: pll_fclk | __APP_PLL_LCLK_LOGIC_SOFT_RESET,
393 addr: rb + APP_PLL_LCLK_CTL_REG);
394 udelay(2000);
395 writel(val: 0xffffffffU, addr: (rb + HOSTFN0_INT_STATUS));
396 writel(val: 0xffffffffU, addr: (rb + HOSTFN1_INT_STATUS));
397 writel(val: pll_sclk, addr: (rb + APP_PLL_SCLK_CTL_REG));
398 writel(val: pll_fclk, addr: (rb + APP_PLL_LCLK_CTL_REG));
399
400 return BFA_STATUS_OK;
401}
402

source code of linux/drivers/scsi/bfa/bfa_ioc_cb.c