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Anton Vorontsov365cfa12010-03-28 00:22:14 -04001/*
2 * ahci.h - Common AHCI SATA definitions and declarations
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2004-2005 Red Hat, Inc.
9 *
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 *
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
28 *
29 * AHCI hardware documentation:
30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
32 *
33 */
34
35#ifndef _AHCI_H
36#define _AHCI_H
37
Viresh Kumarf1e70c22012-08-27 10:37:19 +053038#include <linux/clk.h>
Anton Vorontsov365cfa12010-03-28 00:22:14 -040039#include <linux/libata.h>
40
41/* Enclosure Management Control */
42#define EM_CTRL_MSG_TYPE 0x000f0000
43
44/* Enclosure Management LED Message Type */
45#define EM_MSG_LED_HBA_PORT 0x0000000f
46#define EM_MSG_LED_PMP_SLOT 0x0000ff00
47#define EM_MSG_LED_VALUE 0xffff0000
48#define EM_MSG_LED_VALUE_ACTIVITY 0x00070000
49#define EM_MSG_LED_VALUE_OFF 0xfff80000
50#define EM_MSG_LED_VALUE_ON 0x00010000
51
52enum {
53 AHCI_MAX_PORTS = 32,
54 AHCI_MAX_SG = 168, /* hardware max is 64K */
55 AHCI_DMA_BOUNDARY = 0xffffffff,
56 AHCI_MAX_CMDS = 32,
57 AHCI_CMD_SZ = 32,
58 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
59 AHCI_RX_FIS_SZ = 256,
60 AHCI_CMD_TBL_CDB = 0x40,
61 AHCI_CMD_TBL_HDR_SZ = 0x80,
62 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
63 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
64 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
65 AHCI_RX_FIS_SZ,
66 AHCI_PORT_PRIV_FBS_DMA_SZ = AHCI_CMD_SLOT_SZ +
67 AHCI_CMD_TBL_AR_SZ +
68 (AHCI_RX_FIS_SZ * 16),
69 AHCI_IRQ_ON_SG = (1 << 31),
70 AHCI_CMD_ATAPI = (1 << 5),
71 AHCI_CMD_WRITE = (1 << 6),
72 AHCI_CMD_PREFETCH = (1 << 7),
73 AHCI_CMD_RESET = (1 << 8),
74 AHCI_CMD_CLR_BUSY = (1 << 10),
75
Tejun Heo6ad60192010-10-15 11:00:08 +020076 RX_FIS_PIO_SETUP = 0x20, /* offset of PIO Setup FIS data */
Anton Vorontsov365cfa12010-03-28 00:22:14 -040077 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
78 RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
79 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
80
81 /* global controller registers */
82 HOST_CAP = 0x00, /* host capabilities */
83 HOST_CTL = 0x04, /* global host control */
84 HOST_IRQ_STAT = 0x08, /* interrupt status */
85 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
86 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
87 HOST_EM_LOC = 0x1c, /* Enclosure Management location */
88 HOST_EM_CTL = 0x20, /* Enclosure Management Control */
89 HOST_CAP2 = 0x24, /* host capabilities, extended */
90
91 /* HOST_CTL bits */
92 HOST_RESET = (1 << 0), /* reset controller; self-clear */
93 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
94 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
95
96 /* HOST_CAP bits */
97 HOST_CAP_SXS = (1 << 5), /* Supports External SATA */
98 HOST_CAP_EMS = (1 << 6), /* Enclosure Management support */
99 HOST_CAP_CCC = (1 << 7), /* Command Completion Coalescing */
100 HOST_CAP_PART = (1 << 13), /* Partial state capable */
101 HOST_CAP_SSC = (1 << 14), /* Slumber state capable */
102 HOST_CAP_PIO_MULTI = (1 << 15), /* PIO multiple DRQ support */
103 HOST_CAP_FBS = (1 << 16), /* FIS-based switching support */
104 HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
105 HOST_CAP_ONLY = (1 << 18), /* Supports AHCI mode only */
106 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
107 HOST_CAP_LED = (1 << 25), /* Supports activity LED */
108 HOST_CAP_ALPM = (1 << 26), /* Aggressive Link PM support */
109 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
110 HOST_CAP_MPS = (1 << 28), /* Mechanical presence switch */
111 HOST_CAP_SNTF = (1 << 29), /* SNotification register */
112 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
113 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
114
115 /* HOST_CAP2 bits */
116 HOST_CAP2_BOH = (1 << 0), /* BIOS/OS handoff supported */
117 HOST_CAP2_NVMHCI = (1 << 1), /* NVMHCI supported */
118 HOST_CAP2_APST = (1 << 2), /* Automatic partial to slumber */
Shane Huang65fe1f02012-09-07 22:40:01 +0800119 HOST_CAP2_SDS = (1 << 3), /* Support device sleep */
120 HOST_CAP2_SADM = (1 << 4), /* Support aggressive DevSlp */
121 HOST_CAP2_DESO = (1 << 5), /* DevSlp from slumber only */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400122
123 /* registers for each SATA port */
124 PORT_LST_ADDR = 0x00, /* command list DMA addr */
125 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
126 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
127 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
128 PORT_IRQ_STAT = 0x10, /* interrupt status */
129 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
130 PORT_CMD = 0x18, /* port command */
131 PORT_TFDATA = 0x20, /* taskfile data */
132 PORT_SIG = 0x24, /* device TF signature */
133 PORT_CMD_ISSUE = 0x38, /* command issue */
134 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
135 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
136 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
137 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
138 PORT_SCR_NTF = 0x3c, /* SATA phy register: SNotification */
139 PORT_FBS = 0x40, /* FIS-based Switching */
Shane Huang65fe1f02012-09-07 22:40:01 +0800140 PORT_DEVSLP = 0x44, /* device sleep */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400141
142 /* PORT_IRQ_{STAT,MASK} bits */
143 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
144 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
145 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
146 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
147 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
148 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
149 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
150 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
151
152 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
153 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
154 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
155 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
156 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
157 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
158 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
159 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
160 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
161
162 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
163 PORT_IRQ_IF_ERR |
164 PORT_IRQ_CONNECT |
165 PORT_IRQ_PHYRDY |
166 PORT_IRQ_UNK_FIS |
167 PORT_IRQ_BAD_PMP,
168 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
169 PORT_IRQ_TF_ERR |
170 PORT_IRQ_HBUS_DATA_ERR,
171 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
172 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
173 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
174
175 /* PORT_CMD bits */
176 PORT_CMD_ASP = (1 << 27), /* Aggressive Slumber/Partial */
177 PORT_CMD_ALPE = (1 << 26), /* Aggressive Link PM enable */
178 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
179 PORT_CMD_FBSCP = (1 << 22), /* FBS Capable Port */
180 PORT_CMD_PMP = (1 << 17), /* PMP attached */
181 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
182 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
183 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
184 PORT_CMD_CLO = (1 << 3), /* Command list override */
185 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
186 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
187 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
188
189 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
190 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
191 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
192 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
193
Shane Huang65fe1f02012-09-07 22:40:01 +0800194 /* PORT_FBS bits */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400195 PORT_FBS_DWE_OFFSET = 16, /* FBS device with error offset */
196 PORT_FBS_ADO_OFFSET = 12, /* FBS active dev optimization offset */
197 PORT_FBS_DEV_OFFSET = 8, /* FBS device to issue offset */
198 PORT_FBS_DEV_MASK = (0xf << PORT_FBS_DEV_OFFSET), /* FBS.DEV */
199 PORT_FBS_SDE = (1 << 2), /* FBS single device error */
200 PORT_FBS_DEC = (1 << 1), /* FBS device error clear */
201 PORT_FBS_EN = (1 << 0), /* Enable FBS */
202
Shane Huang65fe1f02012-09-07 22:40:01 +0800203 /* PORT_DEVSLP bits */
204 PORT_DEVSLP_DM_OFFSET = 25, /* DITO multiplier offset */
205 PORT_DEVSLP_DM_MASK = (0xf << 25), /* DITO multiplier mask */
206 PORT_DEVSLP_DITO_OFFSET = 15, /* DITO offset */
207 PORT_DEVSLP_MDAT_OFFSET = 10, /* Minimum assertion time */
208 PORT_DEVSLP_DETO_OFFSET = 2, /* DevSlp exit timeout */
209 PORT_DEVSLP_DSP = (1 << 1), /* DevSlp present */
210 PORT_DEVSLP_ADSE = (1 << 0), /* Aggressive DevSlp enable */
211
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400212 /* hpriv->flags bits */
Brian Norris55d5ec312012-02-21 10:38:43 -0800213
214#define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
215
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400216 AHCI_HFLAG_NO_NCQ = (1 << 0),
217 AHCI_HFLAG_IGN_IRQ_IF_ERR = (1 << 1), /* ignore IRQ_IF_ERR */
218 AHCI_HFLAG_IGN_SERR_INTERNAL = (1 << 2), /* ignore SERR_INTERNAL */
219 AHCI_HFLAG_32BIT_ONLY = (1 << 3), /* force 32bit */
220 AHCI_HFLAG_MV_PATA = (1 << 4), /* PATA port */
221 AHCI_HFLAG_NO_MSI = (1 << 5), /* no PCI MSI */
222 AHCI_HFLAG_NO_PMP = (1 << 6), /* no PMP */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400223 AHCI_HFLAG_SECT255 = (1 << 8), /* max 255 sectors */
224 AHCI_HFLAG_YES_NCQ = (1 << 9), /* force NCQ cap on */
225 AHCI_HFLAG_NO_SUSPEND = (1 << 10), /* don't suspend */
226 AHCI_HFLAG_SRST_TOUT_IS_OFFLINE = (1 << 11), /* treat SRST timeout as
227 link offline */
228 AHCI_HFLAG_NO_SNTF = (1 << 12), /* no sntf */
Tejun Heo83f2b962010-03-30 10:28:32 +0900229 AHCI_HFLAG_NO_FPDMA_AA = (1 << 13), /* no FPDMA AA */
Tejun Heo5f173102010-07-24 16:53:48 +0200230 AHCI_HFLAG_YES_FBS = (1 << 14), /* force FBS cap on */
Brian Norris66583c92012-02-21 10:38:42 -0800231 AHCI_HFLAG_DELAY_ENGINE = (1 << 15), /* do not start engine on
232 port start (wait until
233 error-handling stage) */
Alexander Gordeev5ca72c42012-11-19 16:02:48 +0100234 AHCI_HFLAG_MULTI_MSI = (1 << 16), /* multiple PCI MSIs */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400235
236 /* ap->flags bits */
237
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300238 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
Sergei Shtylyov1a0f6b72011-02-04 22:08:22 +0300239 ATA_FLAG_ACPI_SATA | ATA_FLAG_AN,
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400240
241 ICH_MAP = 0x90, /* ICH MAP register */
242
243 /* em constants */
244 EM_MAX_SLOTS = 8,
245 EM_MAX_RETRY = 5,
246
247 /* em_ctl bits */
Harry Zhangc0623162010-04-23 17:28:38 +0800248 EM_CTL_RST = (1 << 9), /* Reset */
249 EM_CTL_TM = (1 << 8), /* Transmit Message */
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300250 EM_CTL_MR = (1 << 0), /* Message Received */
Harry Zhangc0623162010-04-23 17:28:38 +0800251 EM_CTL_ALHD = (1 << 26), /* Activity LED */
252 EM_CTL_XMT = (1 << 25), /* Transmit Only */
253 EM_CTL_SMB = (1 << 24), /* Single Message Buffer */
Hannes Reinecke6e5fe5b12011-03-04 09:54:52 +0100254 EM_CTL_SGPIO = (1 << 19), /* SGPIO messages supported */
255 EM_CTL_SES = (1 << 18), /* SES-2 messages supported */
256 EM_CTL_SAFTE = (1 << 17), /* SAF-TE messages supported */
257 EM_CTL_LED = (1 << 16), /* LED messages supported */
Harry Zhang008dbd62010-04-23 17:27:19 +0800258
259 /* em message type */
260 EM_MSG_TYPE_LED = (1 << 0), /* LED */
261 EM_MSG_TYPE_SAFTE = (1 << 1), /* SAF-TE */
262 EM_MSG_TYPE_SES2 = (1 << 2), /* SES-2 */
263 EM_MSG_TYPE_SGPIO = (1 << 3), /* SGPIO */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400264};
265
266struct ahci_cmd_hdr {
267 __le32 opts;
268 __le32 status;
269 __le32 tbl_addr;
270 __le32 tbl_addr_hi;
271 __le32 reserved[4];
272};
273
274struct ahci_sg {
275 __le32 addr;
276 __le32 addr_hi;
277 __le32 reserved;
278 __le32 flags_size;
279};
280
281struct ahci_em_priv {
282 enum sw_activity blink_policy;
283 struct timer_list timer;
284 unsigned long saved_activity;
285 unsigned long activity;
286 unsigned long led_state;
287};
288
289struct ahci_port_priv {
290 struct ata_link *active_link;
291 struct ahci_cmd_hdr *cmd_slot;
292 dma_addr_t cmd_slot_dma;
293 void *cmd_tbl;
294 dma_addr_t cmd_tbl_dma;
295 void *rx_fis;
296 dma_addr_t rx_fis_dma;
297 /* for NCQ spurious interrupt analysis */
298 unsigned int ncq_saw_d2h:1;
299 unsigned int ncq_saw_dmas:1;
300 unsigned int ncq_saw_sdb:1;
Alexander Gordeev5ca72c42012-11-19 16:02:48 +0100301 u32 intr_status; /* interrupts to handle */
302 spinlock_t lock; /* protects parent ata_port */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400303 u32 intr_mask; /* interrupts to enable */
304 bool fbs_supported; /* set iff FBS is supported */
305 bool fbs_enabled; /* set iff FBS is enabled */
306 int fbs_last_dev; /* save FBS.DEV of last FIS */
307 /* enclosure management info per PM slot */
308 struct ahci_em_priv em_priv[EM_MAX_SLOTS];
309};
310
311struct ahci_host_priv {
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300312 void __iomem * mmio; /* bus-independent mem map */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400313 unsigned int flags; /* AHCI_HFLAG_* */
314 u32 cap; /* cap to use */
315 u32 cap2; /* cap2 to use */
316 u32 port_map; /* port map to use */
317 u32 saved_cap; /* saved initial cap */
318 u32 saved_cap2; /* saved initial cap2 */
319 u32 saved_port_map; /* saved initial port_map */
320 u32 em_loc; /* enclosure management location */
Harry Zhangc0623162010-04-23 17:28:38 +0800321 u32 em_buf_sz; /* EM buffer size in byte */
Harry Zhang008dbd62010-04-23 17:27:19 +0800322 u32 em_msg_type; /* EM message type */
Viresh Kumarf1e70c22012-08-27 10:37:19 +0530323 struct clk *clk; /* Only for platforms supporting clk */
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400324};
325
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400326extern int ahci_ignore_sss;
327
Tejun Heofad16e72010-09-21 09:25:48 +0200328extern struct device_attribute *ahci_shost_attrs[];
329extern struct device_attribute *ahci_sdev_attrs[];
330
331#define AHCI_SHT(drv_name) \
332 ATA_NCQ_SHT(drv_name), \
333 .can_queue = AHCI_MAX_CMDS - 1, \
334 .sg_tablesize = AHCI_MAX_SG, \
335 .dma_boundary = AHCI_DMA_BOUNDARY, \
336 .shost_attrs = ahci_shost_attrs, \
337 .sdev_attrs = ahci_sdev_attrs
338
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400339extern struct ata_port_operations ahci_ops;
Yuan-Hsin Chen345347c2011-06-21 17:17:38 +0800340extern struct ata_port_operations ahci_pmp_retry_srst_ops;
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400341
Rob Herringbbb4ab42012-08-17 09:51:50 -0500342unsigned int ahci_dev_classify(struct ata_port *ap);
David Milburn02cdfcf2010-11-12 15:38:21 -0600343void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
344 u32 opts);
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400345void ahci_save_initial_config(struct device *dev,
346 struct ahci_host_priv *hpriv,
347 unsigned int force_port_map,
348 unsigned int mask_port_map);
349void ahci_init_controller(struct ata_host *host);
350int ahci_reset_controller(struct ata_host *host);
351
352int ahci_do_softreset(struct ata_link *link, unsigned int *class,
353 int pmp, unsigned long deadline,
354 int (*check_ready)(struct ata_link *link));
355
356int ahci_stop_engine(struct ata_port *ap);
357void ahci_start_engine(struct ata_port *ap);
358int ahci_check_ready(struct ata_link *link);
359int ahci_kick_engine(struct ata_port *ap);
David Milburn02cdfcf2010-11-12 15:38:21 -0600360int ahci_port_resume(struct ata_port *ap);
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400361void ahci_set_em_messages(struct ahci_host_priv *hpriv,
362 struct ata_port_info *pi);
363int ahci_reset_em(struct ata_host *host);
364irqreturn_t ahci_interrupt(int irq, void *dev_instance);
Alexander Gordeev5ca72c42012-11-19 16:02:48 +0100365irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance);
366irqreturn_t ahci_thread_fn(int irq, void *dev_instance);
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400367void ahci_print_info(struct ata_host *host, const char *scc_s);
Alexander Gordeev5ca72c42012-11-19 16:02:48 +0100368int ahci_host_activate(struct ata_host *host, int irq, unsigned int n_msis);
Anton Vorontsov365cfa12010-03-28 00:22:14 -0400369
370static inline void __iomem *__ahci_port_base(struct ata_host *host,
371 unsigned int port_no)
372{
373 struct ahci_host_priv *hpriv = host->private_data;
374 void __iomem *mmio = hpriv->mmio;
375
376 return mmio + 0x100 + (port_no * 0x80);
377}
378
379static inline void __iomem *ahci_port_base(struct ata_port *ap)
380{
381 return __ahci_port_base(ap->host, ap->port_no);
382}
383
384static inline int ahci_nr_ports(u32 cap)
385{
386 return (cap & 0x1f) + 1;
387}
388
389#endif /* _AHCI_H */