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 
16 BFA_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  */
23 static bfa_boolean_t bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc);
24 static void bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc);
25 static void bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc);
26 static void bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc);
27 static void bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix);
28 static void bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc);
29 static void bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc);
30 static bfa_boolean_t bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc);
31 static void bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc);
32 static void bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc);
33 static void bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc);
34 static bfa_boolean_t bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc);
35 static void bfa_ioc_cb_set_cur_ioc_fwstate(
36 			struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
37 static enum bfi_ioc_state bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc);
38 static void bfa_ioc_cb_set_alt_ioc_fwstate(
39 			struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
40 static enum bfi_ioc_state bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc);
41 
42 static struct bfa_ioc_hwif_s hwif_cb;
43 
44 /*
45  * Called from bfa_ioc_attach() to map asic specific calls.
46  */
47 void
bfa_ioc_set_cb_hwif(struct bfa_ioc_s * ioc)48 bfa_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  */
74 static bfa_boolean_t
bfa_ioc_cb_firmware_lock(struct bfa_ioc_s * ioc)75 bfa_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);
94 	if (!bfa_ioc_fwver_cmp(ioc, &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 
103 static void
bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s * ioc)104 bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc)
105 {
106 }
107 
108 /*
109  * Notify other functions on HB failure.
110  */
111 static void
bfa_ioc_cb_notify_fail(struct bfa_ioc_s * ioc)112 bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc)
113 {
114 	writel(~0U, ioc->ioc_regs.err_set);
115 	readl(ioc->ioc_regs.err_set);
116 }
117 
118 /*
119  * Host to LPU mailbox message addresses
120  */
121 static 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  */
129 static 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 
135 static void
bfa_ioc_cb_reg_init(struct bfa_ioc_s * ioc)136 bfa_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 
193 static void
bfa_ioc_cb_map_port(struct bfa_ioc_s * ioc)194 bfa_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  */
207 static void
bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s * ioc,bfa_boolean_t msix)208 bfa_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  */
215 static bfa_boolean_t
bfa_ioc_cb_sync_start(struct bfa_ioc_s * ioc)216 bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc)
217 {
218 	u32 ioc_fwstate = readl(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(BFI_IOC_UNINIT, ioc->ioc_regs.ioc_fwstate);
228 		writel(BFI_IOC_UNINIT, 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  */
238 static void
bfa_ioc_cb_ownership_reset(struct bfa_ioc_s * ioc)239 bfa_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(ioc->ioc_regs.ioc_sem_reg);
248 	writel(1, ioc->ioc_regs.ioc_sem_reg);
249 }
250 
251 /*
252  * Synchronized IOC failure processing routines
253  */
254 static void
bfa_ioc_cb_sync_join(struct bfa_ioc_s * ioc)255 bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc)
256 {
257 	u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
258 	u32 join_pos = bfa_ioc_cb_join_pos(ioc);
259 
260 	writel((r32 | join_pos), ioc->ioc_regs.ioc_fwstate);
261 }
262 
263 static void
bfa_ioc_cb_sync_leave(struct bfa_ioc_s * ioc)264 bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc)
265 {
266 	u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
267 	u32 join_pos = bfa_ioc_cb_join_pos(ioc);
268 
269 	writel((r32 & ~join_pos), ioc->ioc_regs.ioc_fwstate);
270 }
271 
272 static void
bfa_ioc_cb_set_cur_ioc_fwstate(struct bfa_ioc_s * ioc,enum bfi_ioc_state fwstate)273 bfa_ioc_cb_set_cur_ioc_fwstate(struct bfa_ioc_s *ioc,
274 			enum bfi_ioc_state fwstate)
275 {
276 	u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
277 
278 	writel((fwstate | (r32 & BFA_IOC_CB_JOIN_MASK)),
279 				ioc->ioc_regs.ioc_fwstate);
280 }
281 
282 static enum bfi_ioc_state
bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s * ioc)283 bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc)
284 {
285 	return (enum bfi_ioc_state)(readl(ioc->ioc_regs.ioc_fwstate) &
286 			BFA_IOC_CB_FWSTATE_MASK);
287 }
288 
289 static void
bfa_ioc_cb_set_alt_ioc_fwstate(struct bfa_ioc_s * ioc,enum bfi_ioc_state fwstate)290 bfa_ioc_cb_set_alt_ioc_fwstate(struct bfa_ioc_s *ioc,
291 			enum bfi_ioc_state fwstate)
292 {
293 	u32 r32 = readl(ioc->ioc_regs.alt_ioc_fwstate);
294 
295 	writel((fwstate | (r32 & BFA_IOC_CB_JOIN_MASK)),
296 				ioc->ioc_regs.alt_ioc_fwstate);
297 }
298 
299 static enum bfi_ioc_state
bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s * ioc)300 bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc)
301 {
302 	return (enum bfi_ioc_state)(readl(ioc->ioc_regs.alt_ioc_fwstate) &
303 			BFA_IOC_CB_FWSTATE_MASK);
304 }
305 
306 static void
bfa_ioc_cb_sync_ack(struct bfa_ioc_s * ioc)307 bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc)
308 {
309 	bfa_ioc_cb_set_cur_ioc_fwstate(ioc, BFI_IOC_FAIL);
310 }
311 
312 static bfa_boolean_t
bfa_ioc_cb_sync_complete(struct bfa_ioc_s * ioc)313 bfa_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 
356 bfa_status_t
bfa_ioc_cb_pll_init(void __iomem * rb,enum bfi_asic_mode fcmode)357 bfa_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(rb + BFA_IOC0_STATE_REG) &
370 			BFA_IOC_CB_JOIN_MASK;
371 	writel((BFI_IOC_UNINIT | join_bits), (rb + BFA_IOC0_STATE_REG));
372 	join_bits = readl(rb + BFA_IOC1_STATE_REG) &
373 			BFA_IOC_CB_JOIN_MASK;
374 	writel((BFI_IOC_UNINIT | join_bits), (rb + BFA_IOC1_STATE_REG));
375 	writel(0xffffffffU, (rb + HOSTFN0_INT_MSK));
376 	writel(0xffffffffU, (rb + HOSTFN1_INT_MSK));
377 	writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
378 	writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
379 	writel(0xffffffffU, (rb + HOSTFN0_INT_MSK));
380 	writel(0xffffffffU, (rb + HOSTFN1_INT_MSK));
381 	writel(__APP_PLL_SCLK_LOGIC_SOFT_RESET, rb + APP_PLL_SCLK_CTL_REG);
382 	writel(__APP_PLL_SCLK_BYPASS | __APP_PLL_SCLK_LOGIC_SOFT_RESET,
383 			rb + APP_PLL_SCLK_CTL_REG);
384 	writel(__APP_PLL_LCLK_LOGIC_SOFT_RESET, rb + APP_PLL_LCLK_CTL_REG);
385 	writel(__APP_PLL_LCLK_BYPASS | __APP_PLL_LCLK_LOGIC_SOFT_RESET,
386 			rb + APP_PLL_LCLK_CTL_REG);
387 	udelay(2);
388 	writel(__APP_PLL_SCLK_LOGIC_SOFT_RESET, rb + APP_PLL_SCLK_CTL_REG);
389 	writel(__APP_PLL_LCLK_LOGIC_SOFT_RESET, rb + APP_PLL_LCLK_CTL_REG);
390 	writel(pll_sclk | __APP_PLL_SCLK_LOGIC_SOFT_RESET,
391 			rb + APP_PLL_SCLK_CTL_REG);
392 	writel(pll_fclk | __APP_PLL_LCLK_LOGIC_SOFT_RESET,
393 			rb + APP_PLL_LCLK_CTL_REG);
394 	udelay(2000);
395 	writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
396 	writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
397 	writel(pll_sclk, (rb + APP_PLL_SCLK_CTL_REG));
398 	writel(pll_fclk, (rb + APP_PLL_LCLK_CTL_REG));
399 
400 	return BFA_STATUS_OK;
401 }
402