xref: /illumos-gate/usr/src/uts/common/sys/pcie_pwr.h (revision e762302f03f5529f83d98085b915143b08d3ae1b)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef _SYS_PCIE_PWR_H
27 #define	_SYS_PCIE_PWR_H
28 
29 #ifdef	__cplusplus
30 extern "C" {
31 #endif
32 
33 /* index of counters for each level */
34 #define	PCIE_D3_INDEX		PM_LEVEL_D3
35 #define	PCIE_D2_INDEX 		PM_LEVEL_D2
36 #define	PCIE_D1_INDEX		PM_LEVEL_D1
37 #define	PCIE_D0_INDEX		PM_LEVEL_D0
38 #define	PCIE_UNKNOWN_INDEX	PM_LEVEL_D0 + 1
39 #define	PCIE_MAX_PWR_LEVELS 	5
40 
41 /*
42  * PCIe nexus power management data structure
43  */
44 typedef struct pcie_pwr {
45 	/*
46 	 * general data structure fields
47 	 */
48 	kmutex_t	pwr_lock;	/* to protect the counters and  */
49 					/* power level change		*/
50 	int		pwr_pmcaps;	/* pm capability */
51 	ddi_acc_handle_t pwr_conf_hdl;	/* for config access */
52 	uint8_t		pwr_pmcsr_offset; /* PMCSR offset */
53 	int		pwr_link_lvl;	/* link level. Currently not used */
54 	int		pwr_func_lvl;	/* function power level */
55 	int		pwr_flags;	/* flags */
56 	int		pwr_hold;	/* for temporarily keeping busy */
57 	/*
58 	 * counters to keep track of child's power level.
59 	 * D3,D2,D1,D0 and unknown respectively.
60 	 */
61 	int		pwr_counters[PCIE_MAX_PWR_LEVELS];
62 
63 } pcie_pwr_t;
64 
65 typedef struct pcie_pwr_child {
66 	/*
67 	 * Per child dip counters decsribing
68 	 * a child's components
69 	 */
70 	int	pwr_child_counters[PCIE_MAX_PWR_LEVELS];
71 } pcie_pwr_child_t;
72 
73 typedef struct pcie_pm {
74 	pcie_pwr_t	*pcie_pwr_p;	/* nexus PM info */
75 	pcie_pwr_child_t *pcie_par_pminfo; /* PM info created by the parent */
76 } pcie_pm_t;
77 
78 #define	PCIE_PMINFO(dip)	\
79 	((pcie_pm_t *)(DEVI(dip)->devi_nex_pm))
80 
81 #define	PCIE_NEXUS_PMINFO(dip)	\
82 	(PCIE_PMINFO(dip)->pcie_pwr_p)
83 
84 #define	PCIE_PAR_PMINFO(dip)	\
85 	(PCIE_PMINFO(dip)->pcie_par_pminfo)
86 
87 #define	PCIE_CHILD_COUNTERS(cdip)	\
88 	(PCIE_PAR_PMINFO(cdip)->pwr_child_counters)
89 
90 #define	PCIE_SET_PMINFO(dip, pminfo_p)	\
91 	(DEVI(dip)->devi_nex_pm = (pminfo_p))
92 
93 #define	PCIE_RESET_PMINFO(dip)	\
94 	(DEVI(dip)->devi_nex_pm = NULL)
95 
96 #define	PCIE_IS_COMPS_COUNTED(cdip)	\
97 	(PCIE_PMINFO(cdip) && PCIE_PAR_PMINFO(cdip))
98 
99 /*
100  * pmcap field: device power management capability.
101  * First 4 bits must indicate support for D3, D2, D1 and D0
102  * respectively. Their bit position matches with their index
103  * into the counters array.
104  */
105 #define	PCIE_SUPPORTS_D3	0x01 /* Supports D1 */
106 #define	PCIE_SUPPORTS_D2	0x02 /* Supports D2 */
107 #define	PCIE_SUPPORTS_D1	0x04 /* Supports D2 */
108 #define	PCIE_SUPPORTS_D0	0x08 /* Supports D2 */
109 #define	PCIE_L2_CAP		0x10 /* if with Vaux, optional */
110 #define	PCIE_L0s_L1_CAP		0x20 /* ASPM, L0s must, L1 optional */
111 
112 #define	PCIE_DEFAULT_LEVEL_SUPPORTED	(PCIE_SUPPORTS_D3 | PCIE_SUPPORTS_D0)
113 
114 #define	PCIE_LEVEL_SUPPORTED(pmcaps, level)	\
115 	((pmcaps) & (1 << (level)))
116 
117 #define	PCIE_SUPPORTS_DEVICE_PM(dip)	\
118 	(ddi_prop_exists(DDI_DEV_T_ANY, (dip),	\
119 	    DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "pm-components") == 1)
120 /*
121  * flags field
122  */
123 #define	PCIE_ASPM_ENABLED		0x01
124 #define	PCIE_SLOT_LOADED		0x02
125 #define	PCIE_PM_BUSY			0x04
126 #define	PCIE_NO_CHILD_PM		0x08
127 
128 #define	PM_LEVEL_L3	0
129 #define	PM_LEVEL_L2	1
130 #define	PM_LEVEL_L1	2
131 #define	PM_LEVEL_L0	3
132 
133 /* ioctl definitions for ppm drivers */
134 #define	PPMREQ			(('P' << 24) | ('M' << 16))
135 #define	PPMREQ_MASK		0xffff
136 #define	PPMREQ_PRE_PWR_OFF	(PPMREQ | 1)
137 #define	PPMREQ_PRE_PWR_ON	(PPMREQ | 2)
138 #define	PPMREQ_POST_PWR_ON	(PPMREQ | 3)
139 
140 /* settle time in microseconds before PCI operation */
141 #define	PCI_CLK_SETTLE_TIME	10000
142 
143 /*
144  * Interface with other parts of the driver(s) code
145  */
146 
147 /*
148  * We link pcie_pwr.o into several drivers (px, pcieb, pcieb_bcm, pcieb_plx),
149  * which causes the symbols below to be duplicated.  This isn't an issue in
150  * practice, since they aren't used from outside the module that they're
151  * part of.  However, lint does not know this, and when it does global
152  * crosschecks for the kernel, it complains.  To prevent this, we rename the
153  * symbols to driver-specific names when we're doing a lint run.
154  */
155 
156 #if defined(lint)
157 #if defined(PX_MOD_NAME)
158 #define	pwr_common_setup	PX_MOD_NAME##_pwr_common_setup
159 #define	pwr_common_teardown	PX_MOD_NAME##_pwr_common_teardown
160 #define	pcie_bus_power		PX_MOD_NAME##_pcie_bus_power
161 #define	pcie_power		PX_MOD_NAME##_pcie_power
162 #define	pcie_pm_add_child	PX_MOD_NAME##_pcie_pm_add_child
163 #define	pcie_pm_remove_child	PX_MOD_NAME##_pcie_pm_remove_child
164 #define	pcie_pwr_suspend	PX_MOD_NAME##_pcie_pwr_suspend
165 #define	pcie_pwr_resume		PX_MOD_NAME##_pcie_pwr_resume
166 #define	pcie_pm_hold		PX_MOD_NAME##_pcie_pm_hold
167 #define	pcie_pm_release		PX_MOD_NAME##_pcie_pm_release
168 #endif /* PX_MOD_NAME */
169 
170 #if defined(PX_PLX)
171 #define	pwr_common_setup	PX_PLX##_pwr_common_setup
172 #define	pwr_common_teardown	PX_PLX##_pwr_common_teardown
173 #define	pcie_bus_power		PX_PLX##_pcie_bus_power
174 #define	pcie_power		PX_PLX##_pcie_power
175 #define	pcie_pm_add_child	PX_PLX##_pcie_pm_add_child
176 #define	pcie_pm_remove_child	PX_PLX##_pcie_pm_remove_child
177 #define	pcie_pwr_suspend	PX_PLX##_pcie_pwr_suspend
178 #define	pcie_pwr_resume		PX_PLX##_pcie_pwr_resume
179 #define	pcie_pm_hold		PX_PLX##_pcie_pm_hold
180 #define	pcie_pm_release		PX_PLX##_pcie_pm_release
181 #endif /* PX_PLX */
182 #endif /* lint */
183 
184 extern int pcie_plat_pwr_setup(dev_info_t *dip);
185 extern void pcie_plat_pwr_teardown(dev_info_t *dip);
186 extern int pwr_common_setup(dev_info_t *dip);
187 extern void pwr_common_teardown(dev_info_t *dip);
188 extern int pcie_bus_power(dev_info_t *dip, void *impl_arg, pm_bus_power_op_t op,
189     void *arg, void *result);
190 extern int pcie_power(dev_info_t *dip, int component, int level);
191 
192 extern int pcie_pm_add_child(dev_info_t *dip, dev_info_t *cdip);
193 extern int pcie_pm_remove_child(dev_info_t *dip, dev_info_t *cdip);
194 extern int pcie_pwr_suspend(dev_info_t *dip);
195 extern int pcie_pwr_resume(dev_info_t *dip);
196 extern int pcie_pm_hold(dev_info_t *dip);
197 extern void pcie_pm_release(dev_info_t *dip);
198 
199 #ifdef	__cplusplus
200 }
201 #endif
202 
203 #endif	/* _SYS_PCIE_PWR_H */
204