aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/aic94xx/aic94xx_hwi.h
blob: 150f6706d23f8d95a024fbd5836da76bcd8ac91c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
/*
 * Aic94xx SAS/SATA driver hardware interface header file.
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * This file is part of the aic94xx driver.
 *
 * The aic94xx driver is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of the
 * License.
 *
 * The aic94xx driver is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the aic94xx driver; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef _AIC94XX_HWI_H_
#define _AIC94XX_HWI_H_

#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>

#include <scsi/libsas.h>

#include "aic94xx.h"
#include "aic94xx_sas.h"

/* Define ASD_MAX_PHYS to the maximum phys ever. Currently 8. */
#define ASD_MAX_PHYS       8
#define ASD_PCBA_SN_SIZE   12

struct asd_ha_addrspace {
	void __iomem  *addr;
	unsigned long  start;       /* pci resource start */
	unsigned long  len;         /* pci resource len */
	unsigned long  flags;       /* pci resource flags */

	/* addresses internal to the host adapter */
	u32 swa_base; /* mmspace 1 (MBAR1) uses this only */
	u32 swb_base;
	u32 swc_base;
};

struct bios_struct {
	int    present;
	u8     maj;
	u8     min;
	u32    bld;
};

struct unit_element_struct {
	u16    num;
	u16    size;
	void   *area;
};

struct flash_struct {
	u32    bar;
	int    present;
	int    wide;
	u8     manuf;
	u8     dev_id;
	u8     sec_prot;
	u8     method;

	u32    dir_offs;
};

struct asd_phy_desc {
	/* From CTRL-A settings, then set to what is appropriate */
	u8     sas_addr[SAS_ADDR_SIZE];
	u8     max_sas_lrate;
	u8     min_sas_lrate;
	u8     max_sata_lrate;
	u8     min_sata_lrate;
	u8     flags;
#define ASD_CRC_DIS  1
#define ASD_SATA_SPINUP_HOLD 2

	u8     phy_control_0; /* mode 5 reg 0x160 */
	u8     phy_control_1; /* mode 5 reg 0x161 */
	u8     phy_control_2; /* mode 5 reg 0x162 */
	u8     phy_control_3; /* mode 5 reg 0x163 */
};

struct asd_dma_tok {
	void *vaddr;
	dma_addr_t dma_handle;
	size_t size;
};

struct hw_profile {
	struct bios_struct bios;
	struct unit_element_struct ue;
	struct flash_struct flash;

	u8     sas_addr[SAS_ADDR_SIZE];
	char   pcba_sn[ASD_PCBA_SN_SIZE+1];

	u8     enabled_phys;	  /* mask of enabled phys */
	struct asd_phy_desc phy_desc[ASD_MAX_PHYS];
	u32    max_scbs;	  /* absolute sequencer scb queue size */
	struct asd_dma_tok *scb_ext;
	u32    max_ddbs;
	struct asd_dma_tok *ddb_ext;

	spinlock_t ddb_lock;
	void  *ddb_bitmap;

	int    num_phys;	  /* ENABLEABLE */
	int    max_phys;	  /* REPORTED + ENABLEABLE */

	unsigned addr_range;	  /* max # of addrs; max # of possible ports */
	unsigned port_name_base;
	unsigned dev_name_base;
	unsigned sata_name_base;
};

struct asd_ascb {
	struct list_head list;
	struct asd_ha_struct *ha;

	struct scb *scb;	  /* equals dma_scb->vaddr */
	struct asd_dma_tok dma_scb;
	struct asd_dma_tok *sg_arr;

	void (*tasklet_complete)(struct asd_ascb *, struct done_list_struct *);
	u8     uldd_timer:1;

	/* internally generated command */
	struct timer_list timer;
	struct completion completion;
	u8        tag_valid:1;
	__be16    tag;		  /* error recovery only */

	/* If this is an Empty SCB, index of first edb in seq->edb_arr. */
	int    edb_index;

	/* Used by the timer timeout function. */
	int    tc_index;

	void   *uldd_task;
};

#define ASD_DL_SIZE_BITS   0x8
#define ASD_DL_SIZE        (1<<(2+ASD_DL_SIZE_BITS))
#define ASD_DEF_DL_TOGGLE  0x01

struct asd_seq_data {
	spinlock_t pend_q_lock;
	u16    scbpro;
	int    pending;
	struct list_head pend_q;
	int    can_queue;	  /* per adapter */
	struct asd_dma_tok next_scb; /* next scb to be delivered to CSEQ */

	spinlock_t tc_index_lock;
	void **tc_index_array;
	void *tc_index_bitmap;
	int   tc_index_bitmap_bits;

	struct tasklet_struct dl_tasklet;
	struct done_list_struct *dl; /* array of done list entries, equals */
	struct asd_dma_tok *actual_dl; /* actual_dl->vaddr */
	int    dl_toggle;
	int    dl_next;

	int    num_edbs;
	struct asd_dma_tok **edb_arr;
	int    num_escbs;
	struct asd_ascb **escb_arr; /* array of pointers to escbs */
};

/* This is an internal port structure. These are used to get accurate
 * phy_mask for updating DDB 0.
 */
struct asd_port {
	u8  sas_addr[SAS_ADDR_SIZE];
	u8  attached_sas_addr[SAS_ADDR_SIZE];
	u32 phy_mask;
	int num_phys;
};

/* This is the Host Adapter structure.  It describes the hardware
 * SAS adapter.
 */
struct asd_ha_struct {
	struct pci_dev   *pcidev;
	const char       *name;

	struct sas_ha_struct sas_ha;

	u8                revision_id;

	int               iospace;
	spinlock_t        iolock;
	struct asd_ha_addrspace io_handle[2];

	struct hw_profile hw_prof;

	struct asd_phy    phys[ASD_MAX_PHYS];
	spinlock_t        asd_ports_lock;
	struct asd_port   asd_ports[ASD_MAX_PHYS];
	struct asd_sas_port   ports[ASD_MAX_PHYS];

	struct dma_pool  *scb_pool;

	struct asd_seq_data  seq; /* sequencer related */
	u32    bios_status;
	const struct firmware *bios_image;
};

/* ---------- Common macros ---------- */

#define ASD_BUSADDR_LO(__dma_handle) ((u32)(__dma_handle))
#define ASD_BUSADDR_HI(__dma_handle) (((sizeof(dma_addr_t))==8)     \
                                    ? ((u32)((__dma_handle) >> 32)) \
                                    : ((u32)0))

#define dev_to_asd_ha(__dev)  pci_get_drvdata(to_pci_dev(__dev))
#define SCB_SITE_VALID(__site_no) (((__site_no) & 0xF0FF) != 0x00FF   \
				 && ((__site_no) & 0xF0FF) > 0x001F)
/* For each bit set in __lseq_mask, set __lseq to equal the bit
 * position of the set bit and execute the statement following.
 * __mc is the temporary mask, used as a mask "counter".
 */
#define for_each_sequencer(__lseq_mask, __mc, __lseq)                        \
	for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
		if (((__mc) & 1))
#define for_each_phy(__lseq_mask, __mc, __lseq)                              \
	for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
		if (((__mc) & 1))

#define PHY_ENABLED(_HA, _I) ((_HA)->hw_prof.enabled_phys & (1<<(_I)))

/* ---------- DMA allocs ---------- */

static inline struct asd_dma_tok *asd_dmatok_alloc(gfp_t flags)
{
	return kmem_cache_alloc(asd_dma_token_cache, flags);
}

static inline void asd_dmatok_free(struct asd_dma_tok *token)
{
	kmem_cache_free(asd_dma_token_cache, token);
}

static inline struct asd_dma_tok *asd_alloc_coherent(struct asd_ha_struct *
						     asd_ha, size_t size,
						     gfp_t flags)
{
	struct asd_dma_tok *token = asd_dmatok_alloc(flags);
	if (token) {
		token->size = size;
		token->vaddr = dma_alloc_coherent(&asd_ha->pcidev->dev,
						  token->size,
						  &token->dma_handle,
						  flags);
		if (!token->vaddr) {
			asd_dmatok_free(token);
			token = NULL;
		}
	}
	return token;
}

static inline void asd_free_coherent(struct asd_ha_struct *asd_ha,
				     struct asd_dma_tok *token)
{
	if (token) {
		dma_free_coherent(&asd_ha->pcidev->dev, token->size,
				  token->vaddr, token->dma_handle);
		asd_dmatok_free(token);
	}
}

static inline void asd_init_ascb(struct asd_ha_struct *asd_ha,
				 struct asd_ascb *ascb)
{
	INIT_LIST_HEAD(&ascb->list);
	ascb->scb = ascb->dma_scb.vaddr;
	ascb->ha = asd_ha;
	ascb->timer.function = NULL;
	init_timer(&ascb->timer);
	ascb->tc_index = -1;
	init_completion(&ascb->completion);
}

/* Must be called with the tc_index_lock held!
 */
static inline void asd_tc_index_release(struct asd_seq_data *seq, int index)
{
	seq->tc_index_array[index] = NULL;
	clear_bit(index, seq->tc_index_bitmap);
}

/* Must be called with the tc_index_lock held!
 */
static inline int asd_tc_index_get(struct asd_seq_data *seq, void *ptr)
{
	int index;

	index = find_first_zero_bit(seq->tc_index_bitmap,
				    seq->tc_index_bitmap_bits);
	if (index == seq->tc_index_bitmap_bits)
		return -1;

	seq->tc_index_array[index] = ptr;
	set_bit(index, seq->tc_index_bitmap);

	return index;
}

/* Must be called with the tc_index_lock held!
 */
static inline void *asd_tc_index_find(struct asd_seq_data *seq, int index)
{
	return seq->tc_index_array[index];
}

/**
 * asd_ascb_free -- free a single aSCB after is has completed
 * @ascb: pointer to the aSCB of interest
 *
 * This frees an aSCB after it has been executed/completed by
 * the sequencer.
 */
static inline void asd_ascb_free(struct asd_ascb *ascb)
{
	if (ascb) {
		struct asd_ha_struct *asd_ha = ascb->ha;
		unsigned long flags;

		BUG_ON(!list_empty(&ascb->list));
		spin_lock_irqsave(&ascb->ha->seq.tc_index_lock, flags);
		asd_tc_index_release(&ascb->ha->seq, ascb->tc_index);
		spin_unlock_irqrestore(&ascb->ha->seq.tc_index_lock, flags);
		dma_pool_free(asd_ha->scb_pool, ascb->dma_scb.vaddr,
			      ascb->dma_scb.dma_handle);
		kmem_cache_free(asd_ascb_cache, ascb);
	}
}

/**
 * asd_ascb_list_free -- free a list of ascbs
 * @ascb_list: a list of ascbs
 *
 * This function will free a list of ascbs allocated by asd_ascb_alloc_list.
 * It is used when say the scb queueing function returned QUEUE_FULL,
 * and we do not need the ascbs any more.
 */
static inline void asd_ascb_free_list(struct asd_ascb *ascb_list)
{
	LIST_HEAD(list);
	struct list_head *n, *pos;

	__list_add(&list, ascb_list->list.prev, &ascb_list->list);
	list_for_each_safe(pos, n, &list) {
		list_del_init(pos);
		asd_ascb_free(list_entry(pos, struct asd_ascb, list));
	}
}

/* ---------- Function declarations ---------- */

int  asd_init_hw(struct asd_ha_struct *asd_ha);
irqreturn_t asd_hw_isr(int irq, void *dev_id);


struct asd_ascb *asd_ascb_alloc_list(struct asd_ha_struct
				     *asd_ha, int *num,
				     gfp_t gfp_mask);

int  asd_post_ascb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb,
			int num);
int  asd_post_escb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb,
			int num);

int  asd_init_post_escbs(struct asd_ha_struct *asd_ha);
void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc);
void asd_control_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
void asd_turn_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
int  asd_enable_phys(struct asd_ha_struct *asd_ha, const u8 phy_mask);
void asd_build_initiate_link_adm_task(struct asd_ascb *ascb, int phy_id,
				      u8 subfunc);

void asd_ascb_timedout(unsigned long data);
int  asd_chip_hardrst(struct asd_ha_struct *asd_ha);

#endif