xref: /openbmc/linux/drivers/ata/ahci.h (revision bbaf1ff0)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  ahci.h - Common AHCI SATA definitions and declarations
4  *
5  *  Maintained by:  Tejun Heo <tj@kernel.org>
6  *    		    Please ALWAYS copy linux-ide@vger.kernel.org
7  *		    on emails.
8  *
9  *  Copyright 2004-2005 Red Hat, Inc.
10  *
11  * libata documentation is available via 'make {ps|pdf}docs',
12  * as Documentation/driver-api/libata.rst
13  *
14  * AHCI hardware documentation:
15  * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
16  * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
17  */
18 
19 #ifndef _AHCI_H
20 #define _AHCI_H
21 
22 #include <linux/pci.h>
23 #include <linux/clk.h>
24 #include <linux/libata.h>
25 #include <linux/phy/phy.h>
26 #include <linux/regulator/consumer.h>
27 #include <linux/bits.h>
28 
29 /* Enclosure Management Control */
30 #define EM_CTRL_MSG_TYPE              0x000f0000
31 
32 /* Enclosure Management LED Message Type */
33 #define EM_MSG_LED_HBA_PORT           0x0000000f
34 #define EM_MSG_LED_PMP_SLOT           0x0000ff00
35 #define EM_MSG_LED_VALUE              0xffff0000
36 #define EM_MSG_LED_VALUE_ACTIVITY     0x00070000
37 #define EM_MSG_LED_VALUE_OFF          0xfff80000
38 #define EM_MSG_LED_VALUE_ON           0x00010000
39 
40 enum {
41 	AHCI_MAX_PORTS		= 32,
42 	AHCI_MAX_SG		= 168, /* hardware max is 64K */
43 	AHCI_DMA_BOUNDARY	= 0xffffffff,
44 	AHCI_MAX_CMDS		= 32,
45 	AHCI_CMD_SZ		= 32,
46 	AHCI_CMD_SLOT_SZ	= AHCI_MAX_CMDS * AHCI_CMD_SZ,
47 	AHCI_RX_FIS_SZ		= 256,
48 	AHCI_CMD_TBL_CDB	= 0x40,
49 	AHCI_CMD_TBL_HDR_SZ	= 0x80,
50 	AHCI_CMD_TBL_SZ		= AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
51 	AHCI_CMD_TBL_AR_SZ	= AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
52 	AHCI_PORT_PRIV_DMA_SZ	= AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
53 				  AHCI_RX_FIS_SZ,
54 	AHCI_PORT_PRIV_FBS_DMA_SZ	= AHCI_CMD_SLOT_SZ +
55 					  AHCI_CMD_TBL_AR_SZ +
56 					  (AHCI_RX_FIS_SZ * 16),
57 	AHCI_IRQ_ON_SG		= BIT(31),
58 	AHCI_CMD_ATAPI		= BIT(5),
59 	AHCI_CMD_WRITE		= BIT(6),
60 	AHCI_CMD_PREFETCH	= BIT(7),
61 	AHCI_CMD_RESET		= BIT(8),
62 	AHCI_CMD_CLR_BUSY	= BIT(10),
63 
64 	RX_FIS_PIO_SETUP	= 0x20,	/* offset of PIO Setup FIS data */
65 	RX_FIS_D2H_REG		= 0x40,	/* offset of D2H Register FIS data */
66 	RX_FIS_SDB		= 0x58, /* offset of SDB FIS data */
67 	RX_FIS_UNK		= 0x60, /* offset of Unknown FIS data */
68 
69 	/* global controller registers */
70 	HOST_CAP		= 0x00, /* host capabilities */
71 	HOST_CTL		= 0x04, /* global host control */
72 	HOST_IRQ_STAT		= 0x08, /* interrupt status */
73 	HOST_PORTS_IMPL		= 0x0c, /* bitmap of implemented ports */
74 	HOST_VERSION		= 0x10, /* AHCI spec. version compliancy */
75 	HOST_EM_LOC		= 0x1c, /* Enclosure Management location */
76 	HOST_EM_CTL		= 0x20, /* Enclosure Management Control */
77 	HOST_CAP2		= 0x24, /* host capabilities, extended */
78 
79 	/* HOST_CTL bits */
80 	HOST_RESET		= BIT(0),  /* reset controller; self-clear */
81 	HOST_IRQ_EN		= BIT(1),  /* global IRQ enable */
82 	HOST_MRSM		= BIT(2),  /* MSI Revert to Single Message */
83 	HOST_AHCI_EN		= BIT(31), /* AHCI enabled */
84 
85 	/* HOST_CAP bits */
86 	HOST_CAP_SXS		= BIT(5),  /* Supports External SATA */
87 	HOST_CAP_EMS		= BIT(6),  /* Enclosure Management support */
88 	HOST_CAP_CCC		= BIT(7),  /* Command Completion Coalescing */
89 	HOST_CAP_PART		= BIT(13), /* Partial state capable */
90 	HOST_CAP_SSC		= BIT(14), /* Slumber state capable */
91 	HOST_CAP_PIO_MULTI	= BIT(15), /* PIO multiple DRQ support */
92 	HOST_CAP_FBS		= BIT(16), /* FIS-based switching support */
93 	HOST_CAP_PMP		= BIT(17), /* Port Multiplier support */
94 	HOST_CAP_ONLY		= BIT(18), /* Supports AHCI mode only */
95 	HOST_CAP_CLO		= BIT(24), /* Command List Override support */
96 	HOST_CAP_LED		= BIT(25), /* Supports activity LED */
97 	HOST_CAP_ALPM		= BIT(26), /* Aggressive Link PM support */
98 	HOST_CAP_SSS		= BIT(27), /* Staggered Spin-up */
99 	HOST_CAP_MPS		= BIT(28), /* Mechanical presence switch */
100 	HOST_CAP_SNTF		= BIT(29), /* SNotification register */
101 	HOST_CAP_NCQ		= BIT(30), /* Native Command Queueing */
102 	HOST_CAP_64		= BIT(31), /* PCI DAC (64-bit DMA) support */
103 
104 	/* HOST_CAP2 bits */
105 	HOST_CAP2_BOH		= BIT(0),  /* BIOS/OS handoff supported */
106 	HOST_CAP2_NVMHCI	= BIT(1),  /* NVMHCI supported */
107 	HOST_CAP2_APST		= BIT(2),  /* Automatic partial to slumber */
108 	HOST_CAP2_SDS		= BIT(3),  /* Support device sleep */
109 	HOST_CAP2_SADM		= BIT(4),  /* Support aggressive DevSlp */
110 	HOST_CAP2_DESO		= BIT(5),  /* DevSlp from slumber only */
111 
112 	/* registers for each SATA port */
113 	PORT_LST_ADDR		= 0x00, /* command list DMA addr */
114 	PORT_LST_ADDR_HI	= 0x04, /* command list DMA addr hi */
115 	PORT_FIS_ADDR		= 0x08, /* FIS rx buf addr */
116 	PORT_FIS_ADDR_HI	= 0x0c, /* FIS rx buf addr hi */
117 	PORT_IRQ_STAT		= 0x10, /* interrupt status */
118 	PORT_IRQ_MASK		= 0x14, /* interrupt enable/disable mask */
119 	PORT_CMD		= 0x18, /* port command */
120 	PORT_TFDATA		= 0x20,	/* taskfile data */
121 	PORT_SIG		= 0x24,	/* device TF signature */
122 	PORT_CMD_ISSUE		= 0x38, /* command issue */
123 	PORT_SCR_STAT		= 0x28, /* SATA phy register: SStatus */
124 	PORT_SCR_CTL		= 0x2c, /* SATA phy register: SControl */
125 	PORT_SCR_ERR		= 0x30, /* SATA phy register: SError */
126 	PORT_SCR_ACT		= 0x34, /* SATA phy register: SActive */
127 	PORT_SCR_NTF		= 0x3c, /* SATA phy register: SNotification */
128 	PORT_FBS		= 0x40, /* FIS-based Switching */
129 	PORT_DEVSLP		= 0x44, /* device sleep */
130 
131 	/* PORT_IRQ_{STAT,MASK} bits */
132 	PORT_IRQ_COLD_PRES	= BIT(31), /* cold presence detect */
133 	PORT_IRQ_TF_ERR		= BIT(30), /* task file error */
134 	PORT_IRQ_HBUS_ERR	= BIT(29), /* host bus fatal error */
135 	PORT_IRQ_HBUS_DATA_ERR	= BIT(28), /* host bus data error */
136 	PORT_IRQ_IF_ERR		= BIT(27), /* interface fatal error */
137 	PORT_IRQ_IF_NONFATAL	= BIT(26), /* interface non-fatal error */
138 	PORT_IRQ_OVERFLOW	= BIT(24), /* xfer exhausted available S/G */
139 	PORT_IRQ_BAD_PMP	= BIT(23), /* incorrect port multiplier */
140 
141 	PORT_IRQ_PHYRDY		= BIT(22), /* PhyRdy changed */
142 	PORT_IRQ_DMPS		= BIT(7),  /* mechanical presence status */
143 	PORT_IRQ_CONNECT	= BIT(6),  /* port connect change status */
144 	PORT_IRQ_SG_DONE	= BIT(5),  /* descriptor processed */
145 	PORT_IRQ_UNK_FIS	= BIT(4),  /* unknown FIS rx'd */
146 	PORT_IRQ_SDB_FIS	= BIT(3),  /* Set Device Bits FIS rx'd */
147 	PORT_IRQ_DMAS_FIS	= BIT(2),  /* DMA Setup FIS rx'd */
148 	PORT_IRQ_PIOS_FIS	= BIT(1),  /* PIO Setup FIS rx'd */
149 	PORT_IRQ_D2H_REG_FIS	= BIT(0),  /* D2H Register FIS rx'd */
150 
151 	PORT_IRQ_FREEZE		= PORT_IRQ_HBUS_ERR |
152 				  PORT_IRQ_IF_ERR |
153 				  PORT_IRQ_CONNECT |
154 				  PORT_IRQ_PHYRDY |
155 				  PORT_IRQ_UNK_FIS |
156 				  PORT_IRQ_BAD_PMP,
157 	PORT_IRQ_ERROR		= PORT_IRQ_FREEZE |
158 				  PORT_IRQ_TF_ERR |
159 				  PORT_IRQ_HBUS_DATA_ERR,
160 	DEF_PORT_IRQ		= PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
161 				  PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
162 				  PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
163 
164 	/* PORT_CMD bits */
165 	PORT_CMD_ASP		= BIT(27), /* Aggressive Slumber/Partial */
166 	PORT_CMD_ALPE		= BIT(26), /* Aggressive Link PM enable */
167 	PORT_CMD_ATAPI		= BIT(24), /* Device is ATAPI */
168 	PORT_CMD_FBSCP		= BIT(22), /* FBS Capable Port */
169 	PORT_CMD_ESP		= BIT(21), /* External Sata Port */
170 	PORT_CMD_CPD		= BIT(20), /* Cold Presence Detection */
171 	PORT_CMD_MPSP		= BIT(19), /* Mechanical Presence Switch */
172 	PORT_CMD_HPCP		= BIT(18), /* HotPlug Capable Port */
173 	PORT_CMD_PMP		= BIT(17), /* PMP attached */
174 	PORT_CMD_LIST_ON	= BIT(15), /* cmd list DMA engine running */
175 	PORT_CMD_FIS_ON		= BIT(14), /* FIS DMA engine running */
176 	PORT_CMD_FIS_RX		= BIT(4),  /* Enable FIS receive DMA engine */
177 	PORT_CMD_CLO		= BIT(3),  /* Command list override */
178 	PORT_CMD_POWER_ON	= BIT(2),  /* Power up device */
179 	PORT_CMD_SPIN_UP	= BIT(1),  /* Spin up device */
180 	PORT_CMD_START		= BIT(0),  /* Enable port DMA engine */
181 
182 	PORT_CMD_ICC_MASK	= (0xfu << 28), /* i/f ICC state mask */
183 	PORT_CMD_ICC_ACTIVE	= (0x1u << 28), /* Put i/f in active state */
184 	PORT_CMD_ICC_PARTIAL	= (0x2u << 28), /* Put i/f in partial state */
185 	PORT_CMD_ICC_SLUMBER	= (0x6u << 28), /* Put i/f in slumber state */
186 
187 	/* PORT_CMD capabilities mask */
188 	PORT_CMD_CAP		= PORT_CMD_HPCP | PORT_CMD_MPSP |
189 				  PORT_CMD_CPD | PORT_CMD_ESP | PORT_CMD_FBSCP,
190 
191 	/* PORT_FBS bits */
192 	PORT_FBS_DWE_OFFSET	= 16, /* FBS device with error offset */
193 	PORT_FBS_ADO_OFFSET	= 12, /* FBS active dev optimization offset */
194 	PORT_FBS_DEV_OFFSET	= 8,  /* FBS device to issue offset */
195 	PORT_FBS_DEV_MASK	= (0xf << PORT_FBS_DEV_OFFSET),  /* FBS.DEV */
196 	PORT_FBS_SDE		= BIT(2), /* FBS single device error */
197 	PORT_FBS_DEC		= BIT(1), /* FBS device error clear */
198 	PORT_FBS_EN		= BIT(0), /* Enable FBS */
199 
200 	/* PORT_DEVSLP bits */
201 	PORT_DEVSLP_DM_OFFSET	= 25,             /* DITO multiplier offset */
202 	PORT_DEVSLP_DM_MASK	= (0xf << 25),    /* DITO multiplier mask */
203 	PORT_DEVSLP_DITO_OFFSET	= 15,             /* DITO offset */
204 	PORT_DEVSLP_MDAT_OFFSET	= 10,             /* Minimum assertion time */
205 	PORT_DEVSLP_DETO_OFFSET	= 2,              /* DevSlp exit timeout */
206 	PORT_DEVSLP_DSP		= BIT(1),         /* DevSlp present */
207 	PORT_DEVSLP_ADSE	= BIT(0),         /* Aggressive DevSlp enable */
208 
209 	/* hpriv->flags bits */
210 
211 #define AHCI_HFLAGS(flags)		.private_data	= (void *)(flags)
212 
213 	AHCI_HFLAG_NO_NCQ		= BIT(0),
214 	AHCI_HFLAG_IGN_IRQ_IF_ERR	= BIT(1), /* ignore IRQ_IF_ERR */
215 	AHCI_HFLAG_IGN_SERR_INTERNAL	= BIT(2), /* ignore SERR_INTERNAL */
216 	AHCI_HFLAG_32BIT_ONLY		= BIT(3), /* force 32bit */
217 	AHCI_HFLAG_MV_PATA		= BIT(4), /* PATA port */
218 	AHCI_HFLAG_NO_MSI		= BIT(5), /* no PCI MSI */
219 	AHCI_HFLAG_NO_PMP		= BIT(6), /* no PMP */
220 	AHCI_HFLAG_SECT255		= BIT(8), /* max 255 sectors */
221 	AHCI_HFLAG_YES_NCQ		= BIT(9), /* force NCQ cap on */
222 	AHCI_HFLAG_NO_SUSPEND		= BIT(10), /* don't suspend */
223 	AHCI_HFLAG_SRST_TOUT_IS_OFFLINE	= BIT(11), /* treat SRST timeout as
224 						      link offline */
225 	AHCI_HFLAG_NO_SNTF		= BIT(12), /* no sntf */
226 	AHCI_HFLAG_NO_FPDMA_AA		= BIT(13), /* no FPDMA AA */
227 	AHCI_HFLAG_YES_FBS		= BIT(14), /* force FBS cap on */
228 	AHCI_HFLAG_DELAY_ENGINE		= BIT(15), /* do not start engine on
229 						      port start (wait until
230 						      error-handling stage) */
231 	AHCI_HFLAG_NO_DEVSLP		= BIT(17), /* no device sleep */
232 	AHCI_HFLAG_NO_FBS		= BIT(18), /* no FBS */
233 
234 #ifdef CONFIG_PCI_MSI
235 	AHCI_HFLAG_MULTI_MSI		= BIT(20), /* per-port MSI(-X) */
236 #else
237 	/* compile out MSI infrastructure */
238 	AHCI_HFLAG_MULTI_MSI		= 0,
239 #endif
240 	AHCI_HFLAG_WAKE_BEFORE_STOP	= BIT(22), /* wake before DMA stop */
241 	AHCI_HFLAG_YES_ALPM		= BIT(23), /* force ALPM cap on */
242 	AHCI_HFLAG_NO_WRITE_TO_RO	= BIT(24), /* don't write to read
243 						      only registers */
244 	AHCI_HFLAG_USE_LPM_POLICY	= BIT(25), /* chipset that should use
245 						      SATA_MOBILE_LPM_POLICY
246 						      as default lpm_policy */
247 	AHCI_HFLAG_SUSPEND_PHYS		= BIT(26), /* handle PHYs during
248 						      suspend/resume */
249 	AHCI_HFLAG_NO_SXS		= BIT(28), /* SXS not supported */
250 
251 	/* ap->flags bits */
252 
253 	AHCI_FLAG_COMMON		= ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
254 					  ATA_FLAG_ACPI_SATA | ATA_FLAG_AN,
255 
256 	ICH_MAP				= 0x90, /* ICH MAP register */
257 	PCS_6				= 0x92, /* 6 port PCS */
258 	PCS_7				= 0x94, /* 7+ port PCS (Denverton) */
259 
260 	/* em constants */
261 	EM_MAX_SLOTS			= SATA_PMP_MAX_PORTS,
262 	EM_MAX_RETRY			= 5,
263 
264 	/* em_ctl bits */
265 	EM_CTL_RST		= BIT(9), /* Reset */
266 	EM_CTL_TM		= BIT(8), /* Transmit Message */
267 	EM_CTL_MR		= BIT(0), /* Message Received */
268 	EM_CTL_ALHD		= BIT(26), /* Activity LED */
269 	EM_CTL_XMT		= BIT(25), /* Transmit Only */
270 	EM_CTL_SMB		= BIT(24), /* Single Message Buffer */
271 	EM_CTL_SGPIO		= BIT(19), /* SGPIO messages supported */
272 	EM_CTL_SES		= BIT(18), /* SES-2 messages supported */
273 	EM_CTL_SAFTE		= BIT(17), /* SAF-TE messages supported */
274 	EM_CTL_LED		= BIT(16), /* LED messages supported */
275 
276 	/* em message type */
277 	EM_MSG_TYPE_LED		= BIT(0), /* LED */
278 	EM_MSG_TYPE_SAFTE	= BIT(1), /* SAF-TE */
279 	EM_MSG_TYPE_SES2	= BIT(2), /* SES-2 */
280 	EM_MSG_TYPE_SGPIO	= BIT(3), /* SGPIO */
281 };
282 
283 struct ahci_cmd_hdr {
284 	__le32			opts;
285 	__le32			status;
286 	__le32			tbl_addr;
287 	__le32			tbl_addr_hi;
288 	__le32			reserved[4];
289 };
290 
291 struct ahci_sg {
292 	__le32			addr;
293 	__le32			addr_hi;
294 	__le32			reserved;
295 	__le32			flags_size;
296 };
297 
298 struct ahci_em_priv {
299 	enum sw_activity blink_policy;
300 	struct timer_list timer;
301 	unsigned long saved_activity;
302 	unsigned long activity;
303 	unsigned long led_state;
304 	struct ata_link *link;
305 };
306 
307 struct ahci_port_priv {
308 	struct ata_link		*active_link;
309 	struct ahci_cmd_hdr	*cmd_slot;
310 	dma_addr_t		cmd_slot_dma;
311 	void			*cmd_tbl;
312 	dma_addr_t		cmd_tbl_dma;
313 	void			*rx_fis;
314 	dma_addr_t		rx_fis_dma;
315 	/* for NCQ spurious interrupt analysis */
316 	unsigned int		ncq_saw_d2h:1;
317 	unsigned int		ncq_saw_dmas:1;
318 	unsigned int		ncq_saw_sdb:1;
319 	spinlock_t		lock;		/* protects parent ata_port */
320 	u32 			intr_mask;	/* interrupts to enable */
321 	bool			fbs_supported;	/* set iff FBS is supported */
322 	bool			fbs_enabled;	/* set iff FBS is enabled */
323 	int			fbs_last_dev;	/* save FBS.DEV of last FIS */
324 	/* enclosure management info per PM slot */
325 	struct ahci_em_priv	em_priv[EM_MAX_SLOTS];
326 	char			*irq_desc;	/* desc in /proc/interrupts */
327 };
328 
329 struct ahci_host_priv {
330 	/* Input fields */
331 	unsigned int		flags;		/* AHCI_HFLAG_* */
332 	u32			mask_port_map;	/* mask out particular bits */
333 
334 	void __iomem *		mmio;		/* bus-independent mem map */
335 	u32			cap;		/* cap to use */
336 	u32			cap2;		/* cap2 to use */
337 	u32			version;	/* cached version */
338 	u32			port_map;	/* port map to use */
339 	u32			saved_cap;	/* saved initial cap */
340 	u32			saved_cap2;	/* saved initial cap2 */
341 	u32			saved_port_map;	/* saved initial port_map */
342 	u32			saved_port_cap[AHCI_MAX_PORTS]; /* saved port_cap */
343 	u32 			em_loc; /* enclosure management location */
344 	u32			em_buf_sz;	/* EM buffer size in byte */
345 	u32			em_msg_type;	/* EM message type */
346 	u32			remapped_nvme;	/* NVMe remapped device count */
347 	bool			got_runtime_pm; /* Did we do pm_runtime_get? */
348 	unsigned int		n_clks;
349 	struct clk_bulk_data	*clks;		/* Optional */
350 	unsigned int		f_rsts;
351 	struct reset_control	*rsts;		/* Optional */
352 	struct regulator	**target_pwrs;	/* Optional */
353 	struct regulator	*ahci_regulator;/* Optional */
354 	struct regulator	*phy_regulator;/* Optional */
355 	/*
356 	 * If platform uses PHYs. There is a 1:1 relation between the port number and
357 	 * the PHY position in this array.
358 	 */
359 	struct phy		**phys;
360 	unsigned		nports;		/* Number of ports */
361 	void			*plat_data;	/* Other platform data */
362 	unsigned int		irq;		/* interrupt line */
363 	/*
364 	 * Optional ahci_start_engine override, if not set this gets set to the
365 	 * default ahci_start_engine during ahci_save_initial_config, this can
366 	 * be overridden anytime before the host is activated.
367 	 */
368 	void			(*start_engine)(struct ata_port *ap);
369 	/*
370 	 * Optional ahci_stop_engine override, if not set this gets set to the
371 	 * default ahci_stop_engine during ahci_save_initial_config, this can
372 	 * be overridden anytime before the host is activated.
373 	 */
374 	int			(*stop_engine)(struct ata_port *ap);
375 
376 	irqreturn_t 		(*irq_handler)(int irq, void *dev_instance);
377 
378 	/* only required for per-port MSI(-X) support */
379 	int			(*get_irq_vector)(struct ata_host *host,
380 						  int port);
381 };
382 
383 extern int ahci_ignore_sss;
384 
385 extern const struct attribute_group *ahci_shost_groups[];
386 extern const struct attribute_group *ahci_sdev_groups[];
387 
388 /*
389  * This must be instantiated by the edge drivers.  Read the comments
390  * for ATA_BASE_SHT
391  */
392 #define AHCI_SHT(drv_name)						\
393 	__ATA_BASE_SHT(drv_name),					\
394 	.can_queue		= AHCI_MAX_CMDS,			\
395 	.sg_tablesize		= AHCI_MAX_SG,				\
396 	.dma_boundary		= AHCI_DMA_BOUNDARY,			\
397 	.shost_groups		= ahci_shost_groups,			\
398 	.sdev_groups		= ahci_sdev_groups,			\
399 	.change_queue_depth     = ata_scsi_change_queue_depth,		\
400 	.tag_alloc_policy       = BLK_TAG_ALLOC_RR,             	\
401 	.slave_configure        = ata_scsi_slave_config
402 
403 extern struct ata_port_operations ahci_ops;
404 extern struct ata_port_operations ahci_platform_ops;
405 extern struct ata_port_operations ahci_pmp_retry_srst_ops;
406 
407 unsigned int ahci_dev_classify(struct ata_port *ap);
408 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
409 			u32 opts);
410 void ahci_save_initial_config(struct device *dev,
411 			      struct ahci_host_priv *hpriv);
412 void ahci_init_controller(struct ata_host *host);
413 int ahci_reset_controller(struct ata_host *host);
414 
415 int ahci_do_softreset(struct ata_link *link, unsigned int *class,
416 		      int pmp, unsigned long deadline,
417 		      int (*check_ready)(struct ata_link *link));
418 
419 int ahci_do_hardreset(struct ata_link *link, unsigned int *class,
420 		      unsigned long deadline, bool *online);
421 
422 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
423 int ahci_stop_engine(struct ata_port *ap);
424 void ahci_start_fis_rx(struct ata_port *ap);
425 void ahci_start_engine(struct ata_port *ap);
426 int ahci_check_ready(struct ata_link *link);
427 int ahci_kick_engine(struct ata_port *ap);
428 int ahci_port_resume(struct ata_port *ap);
429 void ahci_set_em_messages(struct ahci_host_priv *hpriv,
430 			  struct ata_port_info *pi);
431 int ahci_reset_em(struct ata_host *host);
432 void ahci_print_info(struct ata_host *host, const char *scc_s);
433 int ahci_host_activate(struct ata_host *host, const struct scsi_host_template *sht);
434 void ahci_error_handler(struct ata_port *ap);
435 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked);
436 
437 static inline void __iomem *__ahci_port_base(struct ahci_host_priv *hpriv,
438 					     unsigned int port_no)
439 {
440 	void __iomem *mmio = hpriv->mmio;
441 
442 	return mmio + 0x100 + (port_no * 0x80);
443 }
444 
445 static inline void __iomem *ahci_port_base(struct ata_port *ap)
446 {
447 	struct ahci_host_priv *hpriv = ap->host->private_data;
448 
449 	return __ahci_port_base(hpriv, ap->port_no);
450 }
451 
452 static inline int ahci_nr_ports(u32 cap)
453 {
454 	return (cap & 0x1f) + 1;
455 }
456 
457 #endif /* _AHCI_H */
458