tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
3 * All rights reserved
4 * www.brocade.com
5 *
6 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License (GPL) Version 2 as
10 * published by the Free Software Foundation
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 */
17
18#include "bfad_drv.h"
19#include "bfa_ioc.h"
20#include "bfi_reg.h"
21#include "bfa_defs.h"
22
23BFA_TRC_FILE(CNA, IOC_CB);
24
25#define bfa_ioc_cb_join_pos(__ioc) ((u32) (1 << BFA_IOC_CB_JOIN_SH))
26
27/*
28 * forward declarations
29 */
30static bfa_boolean_t bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc);
31static void bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc);
32static void bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc);
33static void bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc);
34static void bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix);
35static void bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc);
36static void bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc);
37static bfa_boolean_t bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc);
38static void bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc);
39static void bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc);
40static void bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc);
41static bfa_boolean_t bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc);
42static void bfa_ioc_cb_set_cur_ioc_fwstate(
43 struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
44static enum bfi_ioc_state bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc);
45static void bfa_ioc_cb_set_alt_ioc_fwstate(
46 struct bfa_ioc_s *ioc, enum bfi_ioc_state fwstate);
47static enum bfi_ioc_state bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc);
48
49static struct bfa_ioc_hwif_s hwif_cb;
50
51/*
52 * Called from bfa_ioc_attach() to map asic specific calls.
53 */
54void
55bfa_ioc_set_cb_hwif(struct bfa_ioc_s *ioc)
56{
57 hwif_cb.ioc_pll_init = bfa_ioc_cb_pll_init;
58 hwif_cb.ioc_firmware_lock = bfa_ioc_cb_firmware_lock;
59 hwif_cb.ioc_firmware_unlock = bfa_ioc_cb_firmware_unlock;
60 hwif_cb.ioc_reg_init = bfa_ioc_cb_reg_init;
61 hwif_cb.ioc_map_port = bfa_ioc_cb_map_port;
62 hwif_cb.ioc_isr_mode_set = bfa_ioc_cb_isr_mode_set;
63 hwif_cb.ioc_notify_fail = bfa_ioc_cb_notify_fail;
64 hwif_cb.ioc_ownership_reset = bfa_ioc_cb_ownership_reset;
65 hwif_cb.ioc_sync_start = bfa_ioc_cb_sync_start;
66 hwif_cb.ioc_sync_join = bfa_ioc_cb_sync_join;
67 hwif_cb.ioc_sync_leave = bfa_ioc_cb_sync_leave;
68 hwif_cb.ioc_sync_ack = bfa_ioc_cb_sync_ack;
69 hwif_cb.ioc_sync_complete = bfa_ioc_cb_sync_complete;
70 hwif_cb.ioc_set_fwstate = bfa_ioc_cb_set_cur_ioc_fwstate;
71 hwif_cb.ioc_get_fwstate = bfa_ioc_cb_get_cur_ioc_fwstate;
72 hwif_cb.ioc_set_alt_fwstate = bfa_ioc_cb_set_alt_ioc_fwstate;
73 hwif_cb.ioc_get_alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate;
74
75 ioc->ioc_hwif = &hwif_cb;
76}
77
78/*
79 * Return true if firmware of current driver matches the running firmware.
80 */
81static bfa_boolean_t
82bfa_ioc_cb_firmware_lock(struct bfa_ioc_s *ioc)
83{
84 enum bfi_ioc_state alt_fwstate, cur_fwstate;
85 struct bfi_ioc_image_hdr_s fwhdr;
86
87 cur_fwstate = bfa_ioc_cb_get_cur_ioc_fwstate(ioc);
88 bfa_trc(ioc, cur_fwstate);
89 alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate(ioc);
90 bfa_trc(ioc, alt_fwstate);
91
92 /*
93 * Uninit implies this is the only driver as of now.
94 */
95 if (cur_fwstate == BFI_IOC_UNINIT)
96 return BFA_TRUE;
97 /*
98 * Check if another driver with a different firmware is active
99 */
100 bfa_ioc_fwver_get(ioc, &fwhdr);
101 if (!bfa_ioc_fwver_cmp(ioc, &fwhdr) &&
102 alt_fwstate != BFI_IOC_DISABLED) {
103 bfa_trc(ioc, alt_fwstate);
104 return BFA_FALSE;
105 }
106
107 return BFA_TRUE;
108}
109
110static void
111bfa_ioc_cb_firmware_unlock(struct bfa_ioc_s *ioc)
112{
113}
114
115/*
116 * Notify other functions on HB failure.
117 */
118static void
119bfa_ioc_cb_notify_fail(struct bfa_ioc_s *ioc)
120{
121 writel(~0U, ioc->ioc_regs.err_set);
122 readl(ioc->ioc_regs.err_set);
123}
124
125/*
126 * Host to LPU mailbox message addresses
127 */
128static struct { u32 hfn_mbox, lpu_mbox, hfn_pgn; } iocreg_fnreg[] = {
129 { HOSTFN0_LPU_MBOX0_0, LPU_HOSTFN0_MBOX0_0, HOST_PAGE_NUM_FN0 },
130 { HOSTFN1_LPU_MBOX0_8, LPU_HOSTFN1_MBOX0_8, HOST_PAGE_NUM_FN1 }
131};
132
133/*
134 * Host <-> LPU mailbox command/status registers
135 */
136static struct { u32 hfn, lpu; } iocreg_mbcmd[] = {
137
138 { HOSTFN0_LPU0_CMD_STAT, LPU0_HOSTFN0_CMD_STAT },
139 { HOSTFN1_LPU1_CMD_STAT, LPU1_HOSTFN1_CMD_STAT }
140};
141
142static void
143bfa_ioc_cb_reg_init(struct bfa_ioc_s *ioc)
144{
145 void __iomem *rb;
146 int pcifn = bfa_ioc_pcifn(ioc);
147
148 rb = bfa_ioc_bar0(ioc);
149
150 ioc->ioc_regs.hfn_mbox = rb + iocreg_fnreg[pcifn].hfn_mbox;
151 ioc->ioc_regs.lpu_mbox = rb + iocreg_fnreg[pcifn].lpu_mbox;
152 ioc->ioc_regs.host_page_num_fn = rb + iocreg_fnreg[pcifn].hfn_pgn;
153
154 if (ioc->port_id == 0) {
155 ioc->ioc_regs.heartbeat = rb + BFA_IOC0_HBEAT_REG;
156 ioc->ioc_regs.ioc_fwstate = rb + BFA_IOC0_STATE_REG;
157 ioc->ioc_regs.alt_ioc_fwstate = rb + BFA_IOC1_STATE_REG;
158 } else {
159 ioc->ioc_regs.heartbeat = (rb + BFA_IOC1_HBEAT_REG);
160 ioc->ioc_regs.ioc_fwstate = (rb + BFA_IOC1_STATE_REG);
161 ioc->ioc_regs.alt_ioc_fwstate = (rb + BFA_IOC0_STATE_REG);
162 }
163
164 /*
165 * Host <-> LPU mailbox command/status registers
166 */
167 ioc->ioc_regs.hfn_mbox_cmd = rb + iocreg_mbcmd[pcifn].hfn;
168 ioc->ioc_regs.lpu_mbox_cmd = rb + iocreg_mbcmd[pcifn].lpu;
169
170 /*
171 * PSS control registers
172 */
173 ioc->ioc_regs.pss_ctl_reg = (rb + PSS_CTL_REG);
174 ioc->ioc_regs.pss_err_status_reg = (rb + PSS_ERR_STATUS_REG);
175 ioc->ioc_regs.app_pll_fast_ctl_reg = (rb + APP_PLL_LCLK_CTL_REG);
176 ioc->ioc_regs.app_pll_slow_ctl_reg = (rb + APP_PLL_SCLK_CTL_REG);
177
178 /*
179 * IOC semaphore registers and serialization
180 */
181 ioc->ioc_regs.ioc_sem_reg = (rb + HOST_SEM0_REG);
182 ioc->ioc_regs.ioc_init_sem_reg = (rb + HOST_SEM2_REG);
183
184 /*
185 * sram memory access
186 */
187 ioc->ioc_regs.smem_page_start = (rb + PSS_SMEM_PAGE_START);
188 ioc->ioc_regs.smem_pg0 = BFI_IOC_SMEM_PG0_CB;
189
190 /*
191 * err set reg : for notification of hb failure
192 */
193 ioc->ioc_regs.err_set = (rb + ERR_SET_REG);
194}
195
196/*
197 * Initialize IOC to port mapping.
198 */
199
200static void
201bfa_ioc_cb_map_port(struct bfa_ioc_s *ioc)
202{
203 /*
204 * For crossbow, port id is same as pci function.
205 */
206 ioc->port_id = bfa_ioc_pcifn(ioc);
207
208 bfa_trc(ioc, ioc->port_id);
209}
210
211/*
212 * Set interrupt mode for a function: INTX or MSIX
213 */
214static void
215bfa_ioc_cb_isr_mode_set(struct bfa_ioc_s *ioc, bfa_boolean_t msix)
216{
217}
218
219/*
220 * Synchronized IOC failure processing routines
221 */
222static bfa_boolean_t
223bfa_ioc_cb_sync_start(struct bfa_ioc_s *ioc)
224{
225 u32 ioc_fwstate = readl(ioc->ioc_regs.ioc_fwstate);
226
227 /**
228 * Driver load time. If the join bit is set,
229 * it is due to an unclean exit by the driver for this
230 * PCI fn in the previous incarnation. Whoever comes here first
231 * should clean it up, no matter which PCI fn.
232 */
233 if (ioc_fwstate & BFA_IOC_CB_JOIN_MASK) {
234 writel(BFI_IOC_UNINIT, ioc->ioc_regs.ioc_fwstate);
235 writel(BFI_IOC_UNINIT, ioc->ioc_regs.alt_ioc_fwstate);
236 return BFA_TRUE;
237 }
238
239 return bfa_ioc_cb_sync_complete(ioc);
240}
241
242/*
243 * Cleanup hw semaphore and usecnt registers
244 */
245static void
246bfa_ioc_cb_ownership_reset(struct bfa_ioc_s *ioc)
247{
248
249 /*
250 * Read the hw sem reg to make sure that it is locked
251 * before we clear it. If it is not locked, writing 1
252 * will lock it instead of clearing it.
253 */
254 readl(ioc->ioc_regs.ioc_sem_reg);
255 writel(1, ioc->ioc_regs.ioc_sem_reg);
256}
257
258/*
259 * Synchronized IOC failure processing routines
260 */
261static void
262bfa_ioc_cb_sync_join(struct bfa_ioc_s *ioc)
263{
264 u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
265 u32 join_pos = bfa_ioc_cb_join_pos(ioc);
266
267 writel((r32 | join_pos), ioc->ioc_regs.ioc_fwstate);
268}
269
270static void
271bfa_ioc_cb_sync_leave(struct bfa_ioc_s *ioc)
272{
273 u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
274 u32 join_pos = bfa_ioc_cb_join_pos(ioc);
275
276 writel((r32 & ~join_pos), ioc->ioc_regs.ioc_fwstate);
277}
278
279static void
280bfa_ioc_cb_set_cur_ioc_fwstate(struct bfa_ioc_s *ioc,
281 enum bfi_ioc_state fwstate)
282{
283 u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);
284
285 writel((fwstate | (r32 & BFA_IOC_CB_JOIN_MASK)),
286 ioc->ioc_regs.ioc_fwstate);
287}
288
289static enum bfi_ioc_state
290bfa_ioc_cb_get_cur_ioc_fwstate(struct bfa_ioc_s *ioc)
291{
292 return (enum bfi_ioc_state)(readl(ioc->ioc_regs.ioc_fwstate) &
293 BFA_IOC_CB_FWSTATE_MASK);
294}
295
296static void
297bfa_ioc_cb_set_alt_ioc_fwstate(struct bfa_ioc_s *ioc,
298 enum bfi_ioc_state fwstate)
299{
300 u32 r32 = readl(ioc->ioc_regs.alt_ioc_fwstate);
301
302 writel((fwstate | (r32 & BFA_IOC_CB_JOIN_MASK)),
303 ioc->ioc_regs.alt_ioc_fwstate);
304}
305
306static enum bfi_ioc_state
307bfa_ioc_cb_get_alt_ioc_fwstate(struct bfa_ioc_s *ioc)
308{
309 return (enum bfi_ioc_state)(readl(ioc->ioc_regs.alt_ioc_fwstate) &
310 BFA_IOC_CB_FWSTATE_MASK);
311}
312
313static void
314bfa_ioc_cb_sync_ack(struct bfa_ioc_s *ioc)
315{
316 bfa_ioc_cb_set_cur_ioc_fwstate(ioc, BFI_IOC_FAIL);
317}
318
319static bfa_boolean_t
320bfa_ioc_cb_sync_complete(struct bfa_ioc_s *ioc)
321{
322 u32 fwstate, alt_fwstate;
323 fwstate = bfa_ioc_cb_get_cur_ioc_fwstate(ioc);
324
325 /*
326 * At this point, this IOC is hoding the hw sem in the
327 * start path (fwcheck) OR in the disable/enable path
328 * OR to check if the other IOC has acknowledged failure.
329 *
330 * So, this IOC can be in UNINIT, INITING, DISABLED, FAIL
331 * or in MEMTEST states. In a normal scenario, this IOC
332 * can not be in OP state when this function is called.
333 *
334 * However, this IOC could still be in OP state when
335 * the OS driver is starting up, if the OptROM code has
336 * left it in that state.
337 *
338 * If we had marked this IOC's fwstate as BFI_IOC_FAIL
339 * in the failure case and now, if the fwstate is not
340 * BFI_IOC_FAIL it implies that the other PCI fn have
341 * reinitialized the ASIC or this IOC got disabled, so
342 * return TRUE.
343 */
344 if (fwstate == BFI_IOC_UNINIT ||
345 fwstate == BFI_IOC_INITING ||
346 fwstate == BFI_IOC_DISABLED ||
347 fwstate == BFI_IOC_MEMTEST ||
348 fwstate == BFI_IOC_OP)
349 return BFA_TRUE;
350 else {
351 alt_fwstate = bfa_ioc_cb_get_alt_ioc_fwstate(ioc);
352 if (alt_fwstate == BFI_IOC_FAIL ||
353 alt_fwstate == BFI_IOC_DISABLED ||
354 alt_fwstate == BFI_IOC_UNINIT ||
355 alt_fwstate == BFI_IOC_INITING ||
356 alt_fwstate == BFI_IOC_MEMTEST)
357 return BFA_TRUE;
358 else
359 return BFA_FALSE;
360 }
361}
362
363bfa_status_t
364bfa_ioc_cb_pll_init(void __iomem *rb, enum bfi_asic_mode fcmode)
365{
366 u32 pll_sclk, pll_fclk, join_bits;
367
368 pll_sclk = __APP_PLL_SCLK_ENABLE | __APP_PLL_SCLK_LRESETN |
369 __APP_PLL_SCLK_P0_1(3U) |
370 __APP_PLL_SCLK_JITLMT0_1(3U) |
371 __APP_PLL_SCLK_CNTLMT0_1(3U);
372 pll_fclk = __APP_PLL_LCLK_ENABLE | __APP_PLL_LCLK_LRESETN |
373 __APP_PLL_LCLK_RSEL200500 | __APP_PLL_LCLK_P0_1(3U) |
374 __APP_PLL_LCLK_JITLMT0_1(3U) |
375 __APP_PLL_LCLK_CNTLMT0_1(3U);
376 join_bits = readl(rb + BFA_IOC0_STATE_REG) &
377 BFA_IOC_CB_JOIN_MASK;
378 writel((BFI_IOC_UNINIT | join_bits), (rb + BFA_IOC0_STATE_REG));
379 join_bits = readl(rb + BFA_IOC1_STATE_REG) &
380 BFA_IOC_CB_JOIN_MASK;
381 writel((BFI_IOC_UNINIT | join_bits), (rb + BFA_IOC1_STATE_REG));
382 writel(0xffffffffU, (rb + HOSTFN0_INT_MSK));
383 writel(0xffffffffU, (rb + HOSTFN1_INT_MSK));
384 writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
385 writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
386 writel(0xffffffffU, (rb + HOSTFN0_INT_MSK));
387 writel(0xffffffffU, (rb + HOSTFN1_INT_MSK));
388 writel(__APP_PLL_SCLK_LOGIC_SOFT_RESET, rb + APP_PLL_SCLK_CTL_REG);
389 writel(__APP_PLL_SCLK_BYPASS | __APP_PLL_SCLK_LOGIC_SOFT_RESET,
390 rb + APP_PLL_SCLK_CTL_REG);
391 writel(__APP_PLL_LCLK_LOGIC_SOFT_RESET, rb + APP_PLL_LCLK_CTL_REG);
392 writel(__APP_PLL_LCLK_BYPASS | __APP_PLL_LCLK_LOGIC_SOFT_RESET,
393 rb + APP_PLL_LCLK_CTL_REG);
394 udelay(2);
395 writel(__APP_PLL_SCLK_LOGIC_SOFT_RESET, rb + APP_PLL_SCLK_CTL_REG);
396 writel(__APP_PLL_LCLK_LOGIC_SOFT_RESET, rb + APP_PLL_LCLK_CTL_REG);
397 writel(pll_sclk | __APP_PLL_SCLK_LOGIC_SOFT_RESET,
398 rb + APP_PLL_SCLK_CTL_REG);
399 writel(pll_fclk | __APP_PLL_LCLK_LOGIC_SOFT_RESET,
400 rb + APP_PLL_LCLK_CTL_REG);
401 udelay(2000);
402 writel(0xffffffffU, (rb + HOSTFN0_INT_STATUS));
403 writel(0xffffffffU, (rb + HOSTFN1_INT_STATUS));
404 writel(pll_sclk, (rb + APP_PLL_SCLK_CTL_REG));
405 writel(pll_fclk, (rb + APP_PLL_LCLK_CTL_REG));
406
407 return BFA_STATUS_OK;
408}