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_SUSPEND_PHYS		= BIT(25), /* handle PHYs during
245  						      suspend/resume */
246  	AHCI_HFLAG_NO_SXS		= BIT(26), /* SXS not supported */
247  	AHCI_HFLAG_43BIT_ONLY		= BIT(27), /* 43bit DMA addr limit */
248  	AHCI_HFLAG_INTEL_PCS_QUIRK	= BIT(28), /* apply Intel PCS quirk */
249  
250  	/* ap->flags bits */
251  
252  	AHCI_FLAG_COMMON		= ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
253  					  ATA_FLAG_ACPI_SATA | ATA_FLAG_AN,
254  
255  	ICH_MAP				= 0x90, /* ICH MAP register */
256  	PCS_6				= 0x92, /* 6 port PCS */
257  	PCS_7				= 0x94, /* 7+ port PCS (Denverton) */
258  
259  	/* em constants */
260  	EM_MAX_SLOTS			= SATA_PMP_MAX_PORTS,
261  	EM_MAX_RETRY			= 5,
262  
263  	/* em_ctl bits */
264  	EM_CTL_RST		= BIT(9), /* Reset */
265  	EM_CTL_TM		= BIT(8), /* Transmit Message */
266  	EM_CTL_MR		= BIT(0), /* Message Received */
267  	EM_CTL_ALHD		= BIT(26), /* Activity LED */
268  	EM_CTL_XMT		= BIT(25), /* Transmit Only */
269  	EM_CTL_SMB		= BIT(24), /* Single Message Buffer */
270  	EM_CTL_SGPIO		= BIT(19), /* SGPIO messages supported */
271  	EM_CTL_SES		= BIT(18), /* SES-2 messages supported */
272  	EM_CTL_SAFTE		= BIT(17), /* SAF-TE messages supported */
273  	EM_CTL_LED		= BIT(16), /* LED messages supported */
274  
275  	/* em message type */
276  	EM_MSG_TYPE_LED		= BIT(0), /* LED */
277  	EM_MSG_TYPE_SAFTE	= BIT(1), /* SAF-TE */
278  	EM_MSG_TYPE_SES2	= BIT(2), /* SES-2 */
279  	EM_MSG_TYPE_SGPIO	= BIT(3), /* SGPIO */
280  };
281  
282  struct ahci_cmd_hdr {
283  	__le32			opts;
284  	__le32			status;
285  	__le32			tbl_addr;
286  	__le32			tbl_addr_hi;
287  	__le32			reserved[4];
288  };
289  
290  struct ahci_sg {
291  	__le32			addr;
292  	__le32			addr_hi;
293  	__le32			reserved;
294  	__le32			flags_size;
295  };
296  
297  struct ahci_em_priv {
298  	enum sw_activity blink_policy;
299  	struct timer_list timer;
300  	unsigned long saved_activity;
301  	unsigned long activity;
302  	unsigned long led_state;
303  	struct ata_link *link;
304  };
305  
306  struct ahci_port_priv {
307  	struct ata_link		*active_link;
308  	struct ahci_cmd_hdr	*cmd_slot;
309  	dma_addr_t		cmd_slot_dma;
310  	void			*cmd_tbl;
311  	dma_addr_t		cmd_tbl_dma;
312  	void			*rx_fis;
313  	dma_addr_t		rx_fis_dma;
314  	/* for NCQ spurious interrupt analysis */
315  	unsigned int		ncq_saw_d2h:1;
316  	unsigned int		ncq_saw_dmas:1;
317  	unsigned int		ncq_saw_sdb:1;
318  	spinlock_t		lock;		/* protects parent ata_port */
319  	u32 			intr_mask;	/* interrupts to enable */
320  	bool			fbs_supported;	/* set iff FBS is supported */
321  	bool			fbs_enabled;	/* set iff FBS is enabled */
322  	int			fbs_last_dev;	/* save FBS.DEV of last FIS */
323  	/* enclosure management info per PM slot */
324  	struct ahci_em_priv	em_priv[EM_MAX_SLOTS];
325  	char			*irq_desc;	/* desc in /proc/interrupts */
326  };
327  
328  struct ahci_host_priv {
329  	/* Input fields */
330  	unsigned int		flags;		/* AHCI_HFLAG_* */
331  	u32			mask_port_map;	/* mask out particular bits */
332  
333  	void __iomem *		mmio;		/* bus-independent mem map */
334  	u32			cap;		/* cap to use */
335  	u32			cap2;		/* cap2 to use */
336  	u32			version;	/* cached version */
337  	u32			port_map;	/* port map to use */
338  	u32			saved_cap;	/* saved initial cap */
339  	u32			saved_cap2;	/* saved initial cap2 */
340  	u32			saved_port_map;	/* saved initial port_map */
341  	u32			saved_port_cap[AHCI_MAX_PORTS]; /* saved port_cap */
342  	u32 			em_loc; /* enclosure management location */
343  	u32			em_buf_sz;	/* EM buffer size in byte */
344  	u32			em_msg_type;	/* EM message type */
345  	u32			remapped_nvme;	/* NVMe remapped device count */
346  	bool			got_runtime_pm; /* Did we do pm_runtime_get? */
347  	unsigned int		n_clks;
348  	struct clk_bulk_data	*clks;		/* Optional */
349  	unsigned int		f_rsts;
350  	struct reset_control	*rsts;		/* Optional */
351  	struct regulator	**target_pwrs;	/* Optional */
352  	struct regulator	*ahci_regulator;/* Optional */
353  	struct regulator	*phy_regulator;/* Optional */
354  	/*
355  	 * If platform uses PHYs. There is a 1:1 relation between the port number and
356  	 * the PHY position in this array.
357  	 */
358  	struct phy		**phys;
359  	unsigned		nports;		/* Number of ports */
360  	void			*plat_data;	/* Other platform data */
361  	unsigned int		irq;		/* interrupt line */
362  	/*
363  	 * Optional ahci_start_engine override, if not set this gets set to the
364  	 * default ahci_start_engine during ahci_save_initial_config, this can
365  	 * be overridden anytime before the host is activated.
366  	 */
367  	void			(*start_engine)(struct ata_port *ap);
368  	/*
369  	 * Optional ahci_stop_engine override, if not set this gets set to the
370  	 * default ahci_stop_engine during ahci_save_initial_config, this can
371  	 * be overridden anytime before the host is activated.
372  	 */
373  	int			(*stop_engine)(struct ata_port *ap);
374  
375  	irqreturn_t 		(*irq_handler)(int irq, void *dev_instance);
376  
377  	/* only required for per-port MSI(-X) support */
378  	int			(*get_irq_vector)(struct ata_host *host,
379  						  int port);
380  };
381  
382  extern int ahci_ignore_sss;
383  
384  extern const struct attribute_group *ahci_shost_groups[];
385  extern const struct attribute_group *ahci_sdev_groups[];
386  
387  /*
388   * This must be instantiated by the edge drivers.  Read the comments
389   * for ATA_BASE_SHT
390   */
391  #define AHCI_SHT(drv_name)						\
392  	__ATA_BASE_SHT(drv_name),					\
393  	.can_queue		= AHCI_MAX_CMDS,			\
394  	.sg_tablesize		= AHCI_MAX_SG,				\
395  	.dma_boundary		= AHCI_DMA_BOUNDARY,			\
396  	.shost_groups		= ahci_shost_groups,			\
397  	.sdev_groups		= ahci_sdev_groups,			\
398  	.change_queue_depth     = ata_scsi_change_queue_depth,		\
399  	.tag_alloc_policy       = BLK_TAG_ALLOC_RR,             	\
400  	.device_configure	= ata_scsi_device_configure
401  
402  extern struct ata_port_operations ahci_ops;
403  extern struct ata_port_operations ahci_platform_ops;
404  extern struct ata_port_operations ahci_pmp_retry_srst_ops;
405  
406  unsigned int ahci_dev_classify(struct ata_port *ap);
407  void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
408  			u32 opts);
409  void ahci_save_initial_config(struct device *dev,
410  			      struct ahci_host_priv *hpriv);
411  void ahci_init_controller(struct ata_host *host);
412  int ahci_reset_controller(struct ata_host *host);
413  
414  int ahci_do_softreset(struct ata_link *link, unsigned int *class,
415  		      int pmp, unsigned long deadline,
416  		      int (*check_ready)(struct ata_link *link));
417  
418  int ahci_do_hardreset(struct ata_link *link, unsigned int *class,
419  		      unsigned long deadline, bool *online);
420  
421  unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
422  int ahci_stop_engine(struct ata_port *ap);
423  void ahci_start_fis_rx(struct ata_port *ap);
424  void ahci_start_engine(struct ata_port *ap);
425  int ahci_check_ready(struct ata_link *link);
426  int ahci_kick_engine(struct ata_port *ap);
427  int ahci_port_resume(struct ata_port *ap);
428  void ahci_set_em_messages(struct ahci_host_priv *hpriv,
429  			  struct ata_port_info *pi);
430  int ahci_reset_em(struct ata_host *host);
431  void ahci_print_info(struct ata_host *host, const char *scc_s);
432  int ahci_host_activate(struct ata_host *host, const struct scsi_host_template *sht);
433  void ahci_error_handler(struct ata_port *ap);
434  u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked);
435  
__ahci_port_base(struct ahci_host_priv * hpriv,unsigned int port_no)436  static inline void __iomem *__ahci_port_base(struct ahci_host_priv *hpriv,
437  					     unsigned int port_no)
438  {
439  	void __iomem *mmio = hpriv->mmio;
440  
441  	return mmio + 0x100 + (port_no * 0x80);
442  }
443  
ahci_port_base(struct ata_port * ap)444  static inline void __iomem *ahci_port_base(struct ata_port *ap)
445  {
446  	struct ahci_host_priv *hpriv = ap->host->private_data;
447  
448  	return __ahci_port_base(hpriv, ap->port_no);
449  }
450  
ahci_nr_ports(u32 cap)451  static inline int ahci_nr_ports(u32 cap)
452  {
453  	return (cap & 0x1f) + 1;
454  }
455  
456  #endif /* _AHCI_H */
457