1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Andreas Heppel <aheppel@sysgo.de>
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * Copyright (c) 2021 Maciej W. Rozycki <macro@orcam.me.uk>
14 #define PCI_CFG_SPACE_SIZE 256
15 #define PCI_CFG_SPACE_EXP_SIZE 4096
18 * Under PCI, each device has 256 bytes of configuration address space,
19 * of which the first 64 bytes are standardized as follows:
21 #define PCI_STD_HEADER_SIZEOF 64
22 #define PCI_VENDOR_ID 0x00 /* 16 bits */
23 #define PCI_DEVICE_ID 0x02 /* 16 bits */
24 #define PCI_COMMAND 0x04 /* 16 bits */
25 #define PCI_COMMAND_IO 0x1 /* Enable response in I/O space */
26 #define PCI_COMMAND_MEMORY 0x2 /* Enable response in Memory space */
27 #define PCI_COMMAND_MASTER 0x4 /* Enable bus mastering */
28 #define PCI_COMMAND_SPECIAL 0x8 /* Enable response to special cycles */
29 #define PCI_COMMAND_INVALIDATE 0x10 /* Use memory write and invalidate */
30 #define PCI_COMMAND_VGA_PALETTE 0x20 /* Enable palette snooping */
31 #define PCI_COMMAND_PARITY 0x40 /* Enable parity checking */
32 #define PCI_COMMAND_WAIT 0x80 /* Enable address/data stepping */
33 #define PCI_COMMAND_SERR 0x100 /* Enable SERR */
34 #define PCI_COMMAND_FAST_BACK 0x200 /* Enable back-to-back writes */
36 #define PCI_STATUS 0x06 /* 16 bits */
37 #define PCI_STATUS_CAP_LIST 0x10 /* Support Capability List */
38 #define PCI_STATUS_66MHZ 0x20 /* Support 66 Mhz PCI 2.1 bus */
39 #define PCI_STATUS_UDF 0x40 /* Support User Definable Features [obsolete] */
40 #define PCI_STATUS_FAST_BACK 0x80 /* Accept fast-back to back */
41 #define PCI_STATUS_PARITY 0x100 /* Detected parity error */
42 #define PCI_STATUS_DEVSEL_MASK 0x600 /* DEVSEL timing */
43 #define PCI_STATUS_DEVSEL_FAST 0x000
44 #define PCI_STATUS_DEVSEL_MEDIUM 0x200
45 #define PCI_STATUS_DEVSEL_SLOW 0x400
46 #define PCI_STATUS_SIG_TARGET_ABORT 0x800 /* Set on target abort */
47 #define PCI_STATUS_REC_TARGET_ABORT 0x1000 /* Master ack of " */
48 #define PCI_STATUS_REC_MASTER_ABORT 0x2000 /* Set on master abort */
49 #define PCI_STATUS_SIG_SYSTEM_ERROR 0x4000 /* Set when we drive SERR */
50 #define PCI_STATUS_DETECTED_PARITY 0x8000 /* Set on parity error */
52 #define PCI_CLASS_REVISION 0x08 /* High 24 bits are class, low 8
54 #define PCI_REVISION_ID 0x08 /* Revision ID */
55 #define PCI_CLASS_PROG 0x09 /* Reg. Level Programming Interface */
56 #define PCI_CLASS_DEVICE 0x0a /* Device class */
57 #define PCI_CLASS_CODE 0x0b /* Device class code */
58 #define PCI_CLASS_SUB_CODE 0x0a /* Device sub-class code */
60 #define PCI_CACHE_LINE_SIZE 0x0c /* 8 bits */
61 #define PCI_LATENCY_TIMER 0x0d /* 8 bits */
62 #define PCI_HEADER_TYPE 0x0e /* 8 bits */
63 #define PCI_HEADER_TYPE_NORMAL 0
64 #define PCI_HEADER_TYPE_BRIDGE 1
65 #define PCI_HEADER_TYPE_CARDBUS 2
67 #define PCI_BIST 0x0f /* 8 bits */
68 #define PCI_BIST_CODE_MASK 0x0f /* Return result */
69 #define PCI_BIST_START 0x40 /* 1 to start BIST, 2 secs or less */
70 #define PCI_BIST_CAPABLE 0x80 /* 1 if BIST capable */
73 * Base addresses specify locations in memory or I/O space.
74 * Decoded size can be determined by writing a value of
75 * 0xffffffff to the register, and reading it back. Only
78 #define PCI_BASE_ADDRESS_0 0x10 /* 32 bits */
79 #define PCI_BASE_ADDRESS_1 0x14 /* 32 bits [htype 0,1 only] */
80 #define PCI_BASE_ADDRESS_2 0x18 /* 32 bits [htype 0 only] */
81 #define PCI_BASE_ADDRESS_3 0x1c /* 32 bits */
82 #define PCI_BASE_ADDRESS_4 0x20 /* 32 bits */
83 #define PCI_BASE_ADDRESS_5 0x24 /* 32 bits */
84 #define PCI_BASE_ADDRESS_SPACE 0x01 /* 0 = memory, 1 = I/O */
85 #define PCI_BASE_ADDRESS_SPACE_IO 0x01
86 #define PCI_BASE_ADDRESS_SPACE_MEMORY 0x00
87 #define PCI_BASE_ADDRESS_MEM_TYPE_MASK 0x06
88 #define PCI_BASE_ADDRESS_MEM_TYPE_32 0x00 /* 32 bit address */
89 #define PCI_BASE_ADDRESS_MEM_TYPE_1M 0x02 /* Below 1M [obsolete] */
90 #define PCI_BASE_ADDRESS_MEM_TYPE_64 0x04 /* 64 bit address */
91 #define PCI_BASE_ADDRESS_MEM_PREFETCH 0x08 /* prefetchable? */
92 #define PCI_BASE_ADDRESS_MEM_MASK (~0x0fULL)
93 #define PCI_BASE_ADDRESS_IO_MASK (~0x03ULL)
94 /* bit 1 is reserved if address_space = 1 */
96 /* Convert a regsister address (e.g. PCI_BASE_ADDRESS_1) to a bar # (e.g. 1) */
97 #define pci_offset_to_barnum(offset) \
98 (((offset) - PCI_BASE_ADDRESS_0) / sizeof(u32))
100 /* Header type 0 (normal devices) */
101 #define PCI_CARDBUS_CIS 0x28
102 #define PCI_SUBSYSTEM_VENDOR_ID 0x2c
103 #define PCI_SUBSYSTEM_ID 0x2e
104 #define PCI_ROM_ADDRESS 0x30 /* Bits 31..11 are address, 10..1 reserved */
105 #define PCI_ROM_ADDRESS_ENABLE 0x01
106 #define PCI_ROM_ADDRESS_MASK (~0x7ffULL)
108 #define PCI_CAPABILITY_LIST 0x34 /* Offset of first capability list entry */
110 /* 0x35-0x3b are reserved */
111 #define PCI_INTERRUPT_LINE 0x3c /* 8 bits */
112 #define PCI_INTERRUPT_PIN 0x3d /* 8 bits */
113 #define PCI_MIN_GNT 0x3e /* 8 bits */
114 #define PCI_MAX_LAT 0x3f /* 8 bits */
116 #define PCI_INTERRUPT_LINE_DISABLE 0xff
118 /* Header type 1 (PCI-to-PCI bridges) */
119 #define PCI_PRIMARY_BUS 0x18 /* Primary bus number */
120 #define PCI_SECONDARY_BUS 0x19 /* Secondary bus number */
121 #define PCI_SUBORDINATE_BUS 0x1a /* Highest bus number behind the bridge */
122 #define PCI_SEC_LATENCY_TIMER 0x1b /* Latency timer for secondary interface */
123 #define PCI_IO_BASE 0x1c /* I/O range behind the bridge */
124 #define PCI_IO_LIMIT 0x1d
125 #define PCI_IO_RANGE_TYPE_MASK 0x0f /* I/O bridging type */
126 #define PCI_IO_RANGE_TYPE_16 0x00
127 #define PCI_IO_RANGE_TYPE_32 0x01
128 #define PCI_IO_RANGE_MASK ~0x0f
129 #define PCI_SEC_STATUS 0x1e /* Secondary status register, only bit 14 used */
130 #define PCI_MEMORY_BASE 0x20 /* Memory range behind */
131 #define PCI_MEMORY_LIMIT 0x22
132 #define PCI_MEMORY_RANGE_TYPE_MASK 0x0f
133 #define PCI_MEMORY_RANGE_MASK ~0x0f
134 #define PCI_PREF_MEMORY_BASE 0x24 /* Prefetchable memory range behind */
135 #define PCI_PREF_MEMORY_LIMIT 0x26
136 #define PCI_PREF_RANGE_TYPE_MASK 0x0f
137 #define PCI_PREF_RANGE_TYPE_32 0x00
138 #define PCI_PREF_RANGE_TYPE_64 0x01
139 #define PCI_PREF_RANGE_MASK ~0x0f
140 #define PCI_PREF_BASE_UPPER32 0x28 /* Upper half of prefetchable memory range */
141 #define PCI_PREF_LIMIT_UPPER32 0x2c
142 #define PCI_IO_BASE_UPPER16 0x30 /* Upper half of I/O addresses */
143 #define PCI_IO_LIMIT_UPPER16 0x32
144 /* 0x34 same as for htype 0 */
145 /* 0x35-0x3b is reserved */
146 #define PCI_ROM_ADDRESS1 0x38 /* Same as PCI_ROM_ADDRESS, but for htype 1 */
147 /* 0x3c-0x3d are same as for htype 0 */
148 #define PCI_BRIDGE_CONTROL 0x3e
149 #define PCI_BRIDGE_CTL_PARITY 0x01 /* Enable parity detection on secondary interface */
150 #define PCI_BRIDGE_CTL_SERR 0x02 /* The same for SERR forwarding */
151 #define PCI_BRIDGE_CTL_NO_ISA 0x04 /* Disable bridging of ISA ports */
152 #define PCI_BRIDGE_CTL_VGA 0x08 /* Forward VGA addresses */
153 #define PCI_BRIDGE_CTL_MASTER_ABORT 0x20 /* Report master aborts */
154 #define PCI_BRIDGE_CTL_BUS_RESET 0x40 /* Secondary bus reset */
155 #define PCI_BRIDGE_CTL_FAST_BACK 0x80 /* Fast Back2Back enabled on secondary interface */
157 /* Header type 2 (CardBus bridges) */
158 #define PCI_CB_CAPABILITY_LIST 0x14
160 #define PCI_CB_SEC_STATUS 0x16 /* Secondary status */
161 #define PCI_CB_PRIMARY_BUS 0x18 /* PCI bus number */
162 #define PCI_CB_CARD_BUS 0x19 /* CardBus bus number */
163 #define PCI_CB_SUBORDINATE_BUS 0x1a /* Subordinate bus number */
164 #define PCI_CB_LATENCY_TIMER 0x1b /* CardBus latency timer */
165 #define PCI_CB_MEMORY_BASE_0 0x1c
166 #define PCI_CB_MEMORY_LIMIT_0 0x20
167 #define PCI_CB_MEMORY_BASE_1 0x24
168 #define PCI_CB_MEMORY_LIMIT_1 0x28
169 #define PCI_CB_IO_BASE_0 0x2c
170 #define PCI_CB_IO_BASE_0_HI 0x2e
171 #define PCI_CB_IO_LIMIT_0 0x30
172 #define PCI_CB_IO_LIMIT_0_HI 0x32
173 #define PCI_CB_IO_BASE_1 0x34
174 #define PCI_CB_IO_BASE_1_HI 0x36
175 #define PCI_CB_IO_LIMIT_1 0x38
176 #define PCI_CB_IO_LIMIT_1_HI 0x3a
177 #define PCI_CB_IO_RANGE_MASK ~0x03
178 /* 0x3c-0x3d are same as for htype 0 */
179 #define PCI_CB_BRIDGE_CONTROL 0x3e
180 #define PCI_CB_BRIDGE_CTL_PARITY 0x01 /* Similar to standard bridge control register */
181 #define PCI_CB_BRIDGE_CTL_SERR 0x02
182 #define PCI_CB_BRIDGE_CTL_ISA 0x04
183 #define PCI_CB_BRIDGE_CTL_VGA 0x08
184 #define PCI_CB_BRIDGE_CTL_MASTER_ABORT 0x20
185 #define PCI_CB_BRIDGE_CTL_CB_RESET 0x40 /* CardBus reset */
186 #define PCI_CB_BRIDGE_CTL_16BIT_INT 0x80 /* Enable interrupt for 16-bit cards */
187 #define PCI_CB_BRIDGE_CTL_PREFETCH_MEM0 0x100 /* Prefetch enable for both memory regions */
188 #define PCI_CB_BRIDGE_CTL_PREFETCH_MEM1 0x200
189 #define PCI_CB_BRIDGE_CTL_POST_WRITES 0x400
190 #define PCI_CB_SUBSYSTEM_VENDOR_ID 0x40
191 #define PCI_CB_SUBSYSTEM_ID 0x42
192 #define PCI_CB_LEGACY_MODE_BASE 0x44 /* 16-bit PC Card legacy mode base address (ExCa) */
193 /* 0x48-0x7f reserved */
195 /* Capability lists */
197 #define PCI_CAP_LIST_ID 0 /* Capability ID */
198 #define PCI_CAP_ID_PM 0x01 /* Power Management */
199 #define PCI_CAP_ID_AGP 0x02 /* Accelerated Graphics Port */
200 #define PCI_CAP_ID_VPD 0x03 /* Vital Product Data */
201 #define PCI_CAP_ID_SLOTID 0x04 /* Slot Identification */
202 #define PCI_CAP_ID_MSI 0x05 /* Message Signalled Interrupts */
203 #define PCI_CAP_ID_CHSWP 0x06 /* CompactPCI HotSwap */
204 #define PCI_CAP_ID_PCIX 0x07 /* PCI-X */
205 #define PCI_CAP_ID_HT 0x08 /* HyperTransport */
206 #define PCI_CAP_ID_VNDR 0x09 /* Vendor-Specific */
207 #define PCI_CAP_ID_DBG 0x0A /* Debug port */
208 #define PCI_CAP_ID_CCRC 0x0B /* CompactPCI Central Resource Control */
209 #define PCI_CAP_ID_SHPC 0x0C /* PCI Standard Hot-Plug Controller */
210 #define PCI_CAP_ID_SSVID 0x0D /* Bridge subsystem vendor/device ID */
211 #define PCI_CAP_ID_AGP3 0x0E /* AGP Target PCI-PCI bridge */
212 #define PCI_CAP_ID_SECDEV 0x0F /* Secure Device */
213 #define PCI_CAP_ID_EXP 0x10 /* PCI Express */
214 #define PCI_CAP_ID_MSIX 0x11 /* MSI-X */
215 #define PCI_CAP_ID_SATA 0x12 /* SATA Data/Index Conf. */
216 #define PCI_CAP_ID_AF 0x13 /* PCI Advanced Features */
217 #define PCI_CAP_ID_EA 0x14 /* PCI Enhanced Allocation */
218 #define PCI_CAP_ID_MAX PCI_CAP_ID_EA
219 #define PCI_CAP_LIST_NEXT 1 /* Next capability in the list */
220 #define PCI_CAP_FLAGS 2 /* Capability defined flags (16 bits) */
221 #define PCI_CAP_SIZEOF 4
223 /* Power Management Registers */
225 #define PCI_PM_CAP_VER_MASK 0x0007 /* Version */
226 #define PCI_PM_CAP_PME_CLOCK 0x0008 /* PME clock required */
227 #define PCI_PM_CAP_AUX_POWER 0x0010 /* Auxilliary power support */
228 #define PCI_PM_CAP_DSI 0x0020 /* Device specific initialization */
229 #define PCI_PM_CAP_D1 0x0200 /* D1 power state support */
230 #define PCI_PM_CAP_D2 0x0400 /* D2 power state support */
231 #define PCI_PM_CAP_PME 0x0800 /* PME pin supported */
232 #define PCI_PM_CTRL 4 /* PM control and status register */
233 #define PCI_PM_CTRL_STATE_MASK 0x0003 /* Current power state (D0 to D3) */
234 #define PCI_PM_CTRL_PME_ENABLE 0x0100 /* PME pin enable */
235 #define PCI_PM_CTRL_DATA_SEL_MASK 0x1e00 /* Data select (??) */
236 #define PCI_PM_CTRL_DATA_SCALE_MASK 0x6000 /* Data scale (??) */
237 #define PCI_PM_CTRL_PME_STATUS 0x8000 /* PME pin status */
238 #define PCI_PM_PPB_EXTENSIONS 6 /* PPB support extensions (??) */
239 #define PCI_PM_PPB_B2_B3 0x40 /* Stop clock when in D3hot (??) */
240 #define PCI_PM_BPCC_ENABLE 0x80 /* Bus power/clock control enable (??) */
241 #define PCI_PM_DATA_REGISTER 7 /* (??) */
242 #define PCI_PM_SIZEOF 8
246 #define PCI_AGP_VERSION 2 /* BCD version number */
247 #define PCI_AGP_RFU 3 /* Rest of capability flags */
248 #define PCI_AGP_STATUS 4 /* Status register */
249 #define PCI_AGP_STATUS_RQ_MASK 0xff000000 /* Maximum number of requests - 1 */
250 #define PCI_AGP_STATUS_SBA 0x0200 /* Sideband addressing supported */
251 #define PCI_AGP_STATUS_64BIT 0x0020 /* 64-bit addressing supported */
252 #define PCI_AGP_STATUS_FW 0x0010 /* FW transfers supported */
253 #define PCI_AGP_STATUS_RATE4 0x0004 /* 4x transfer rate supported */
254 #define PCI_AGP_STATUS_RATE2 0x0002 /* 2x transfer rate supported */
255 #define PCI_AGP_STATUS_RATE1 0x0001 /* 1x transfer rate supported */
256 #define PCI_AGP_COMMAND 8 /* Control register */
257 #define PCI_AGP_COMMAND_RQ_MASK 0xff000000 /* Master: Maximum number of requests */
258 #define PCI_AGP_COMMAND_SBA 0x0200 /* Sideband addressing enabled */
259 #define PCI_AGP_COMMAND_AGP 0x0100 /* Allow processing of AGP transactions */
260 #define PCI_AGP_COMMAND_64BIT 0x0020 /* Allow processing of 64-bit addresses */
261 #define PCI_AGP_COMMAND_FW 0x0010 /* Force FW transfers */
262 #define PCI_AGP_COMMAND_RATE4 0x0004 /* Use 4x rate */
263 #define PCI_AGP_COMMAND_RATE2 0x0002 /* Use 4x rate */
264 #define PCI_AGP_COMMAND_RATE1 0x0001 /* Use 4x rate */
265 #define PCI_AGP_SIZEOF 12
267 /* PCI-X registers */
269 #define PCI_X_CMD_DPERR_E 0x0001 /* Data Parity Error Recovery Enable */
270 #define PCI_X_CMD_ERO 0x0002 /* Enable Relaxed Ordering */
271 #define PCI_X_CMD_MAX_READ 0x0000 /* Max Memory Read Byte Count */
272 #define PCI_X_CMD_MAX_SPLIT 0x0030 /* Max Outstanding Split Transactions */
273 #define PCI_X_CMD_VERSION(x) (((x) >> 12) & 3) /* Version */
276 /* Slot Identification */
278 #define PCI_SID_ESR 2 /* Expansion Slot Register */
279 #define PCI_SID_ESR_NSLOTS 0x1f /* Number of expansion slots available */
280 #define PCI_SID_ESR_FIC 0x20 /* First In Chassis Flag */
281 #define PCI_SID_CHASSIS_NR 3 /* Chassis Number */
283 /* Message Signalled Interrupts registers */
285 #define PCI_MSI_FLAGS 2 /* Various flags */
286 #define PCI_MSI_FLAGS_64BIT 0x80 /* 64-bit addresses allowed */
287 #define PCI_MSI_FLAGS_QSIZE 0x70 /* Message queue size configured */
288 #define PCI_MSI_FLAGS_QMASK 0x0e /* Maximum queue size available */
289 #define PCI_MSI_FLAGS_ENABLE 0x01 /* MSI feature enabled */
290 #define PCI_MSI_FLAGS_MASKBIT 0x0100 /* Per-vector masking capable */
291 #define PCI_MSI_RFU 3 /* Rest of capability flags */
292 #define PCI_MSI_ADDRESS_LO 4 /* Lower 32 bits */
293 #define PCI_MSI_ADDRESS_HI 8 /* Upper 32 bits (if PCI_MSI_FLAGS_64BIT set) */
294 #define PCI_MSI_DATA_32 8 /* 16 bits of data for 32-bit devices */
295 #define PCI_MSI_DATA_64 12 /* 16 bits of data for 64-bit devices */
297 #define PCI_MAX_PCI_DEVICES 32
298 #define PCI_MAX_PCI_FUNCTIONS 8
300 #define PCI_FIND_CAP_TTL 0x48
301 #define CAP_START_POS 0x40
303 /* Extended Capabilities (PCI-X 2.0 and Express) */
304 #define PCI_EXT_CAP_ID(header) (header & 0x0000ffff)
305 #define PCI_EXT_CAP_VER(header) ((header >> 16) & 0xf)
306 #define PCI_EXT_CAP_NEXT(header) ((header >> 20) & 0xffc)
308 #define PCI_EXT_CAP_ID_ERR 0x01 /* Advanced Error Reporting */
309 #define PCI_EXT_CAP_ID_VC 0x02 /* Virtual Channel Capability */
310 #define PCI_EXT_CAP_ID_DSN 0x03 /* Device Serial Number */
311 #define PCI_EXT_CAP_ID_PWR 0x04 /* Power Budgeting */
312 #define PCI_EXT_CAP_ID_RCLD 0x05 /* Root Complex Link Declaration */
313 #define PCI_EXT_CAP_ID_RCILC 0x06 /* Root Complex Internal Link Control */
314 #define PCI_EXT_CAP_ID_RCEC 0x07 /* Root Complex Event Collector */
315 #define PCI_EXT_CAP_ID_MFVC 0x08 /* Multi-Function VC Capability */
316 #define PCI_EXT_CAP_ID_VC9 0x09 /* same as _VC */
317 #define PCI_EXT_CAP_ID_RCRB 0x0A /* Root Complex RB? */
318 #define PCI_EXT_CAP_ID_VNDR 0x0B /* Vendor-Specific */
319 #define PCI_EXT_CAP_ID_CAC 0x0C /* Config Access - obsolete */
320 #define PCI_EXT_CAP_ID_ACS 0x0D /* Access Control Services */
321 #define PCI_EXT_CAP_ID_ARI 0x0E /* Alternate Routing ID */
322 #define PCI_EXT_CAP_ID_ATS 0x0F /* Address Translation Services */
323 #define PCI_EXT_CAP_ID_SRIOV 0x10 /* Single Root I/O Virtualization */
324 #define PCI_EXT_CAP_ID_MRIOV 0x11 /* Multi Root I/O Virtualization */
325 #define PCI_EXT_CAP_ID_MCAST 0x12 /* Multicast */
326 #define PCI_EXT_CAP_ID_PRI 0x13 /* Page Request Interface */
327 #define PCI_EXT_CAP_ID_AMD_XXX 0x14 /* Reserved for AMD */
328 #define PCI_EXT_CAP_ID_REBAR 0x15 /* Resizable BAR */
329 #define PCI_EXT_CAP_ID_DPA 0x16 /* Dynamic Power Allocation */
330 #define PCI_EXT_CAP_ID_TPH 0x17 /* TPH Requester */
331 #define PCI_EXT_CAP_ID_LTR 0x18 /* Latency Tolerance Reporting */
332 #define PCI_EXT_CAP_ID_SECPCI 0x19 /* Secondary PCIe Capability */
333 #define PCI_EXT_CAP_ID_PMUX 0x1A /* Protocol Multiplexing */
334 #define PCI_EXT_CAP_ID_PASID 0x1B /* Process Address Space ID */
335 #define PCI_EXT_CAP_ID_DPC 0x1D /* Downstream Port Containment */
336 #define PCI_EXT_CAP_ID_L1SS 0x1E /* L1 PM Substates */
337 #define PCI_EXT_CAP_ID_PTM 0x1F /* Precision Time Measurement */
338 #define PCI_EXT_CAP_ID_MAX PCI_EXT_CAP_ID_PTM
340 /* Enhanced Allocation Registers */
341 #define PCI_EA_NUM_ENT 2 /* Number of Capability Entries */
342 #define PCI_EA_NUM_ENT_MASK 0x3f /* Num Entries Mask */
343 #define PCI_EA_FIRST_ENT 4 /* First EA Entry in List */
344 #define PCI_EA_ES 0x00000007 /* Entry Size */
345 #define PCI_EA_BEI 0x000000f0 /* BAR Equivalent Indicator */
346 /* 9-14 map to VF BARs 0-5 respectively */
347 #define PCI_EA_BEI_VF_BAR0 9
348 #define PCI_EA_BEI_VF_BAR5 14
349 /* Base, MaxOffset registers */
350 /* bit 0 is reserved */
351 #define PCI_EA_IS_64 0x00000002 /* 64-bit field flag */
352 #define PCI_EA_FIELD_MASK 0xfffffffc /* For Base & Max Offset */
354 /* PCI Express capabilities */
355 #define PCI_EXP_FLAGS 2 /* Capabilities register */
356 #define PCI_EXP_FLAGS_VERS 0x000f /* Capability Version */
357 #define PCI_EXP_FLAGS_TYPE 0x00f0 /* Device/Port type */
358 #define PCI_EXP_TYPE_ROOT_PORT 0x4 /* Root Port */
359 #define PCI_EXP_TYPE_DOWNSTREAM 0x6 /* Downstream Port */
360 #define PCI_EXP_TYPE_PCIE_BRIDGE 0x8 /* PCI/PCI-X to PCIe Bridge */
361 #define PCI_EXP_DEVCAP 4 /* Device capabilities */
362 #define PCI_EXP_DEVCAP_FLR 0x10000000 /* Function Level Reset */
363 #define PCI_EXP_DEVCTL 8 /* Device Control */
364 #define PCI_EXP_DEVCTL_PAYLOAD 0x00e0 /* Max_Payload_Size */
365 #define PCI_EXP_DEVCTL_PAYLOAD_128B 0x0000 /* 128 Bytes */
366 #define PCI_EXP_DEVCTL_PAYLOAD_256B 0x0020 /* 256 Bytes */
367 #define PCI_EXP_DEVCTL_PAYLOAD_512B 0x0040 /* 512 Bytes */
368 #define PCI_EXP_DEVCTL_PAYLOAD_1024B 0x0060 /* 1024 Bytes */
369 #define PCI_EXP_DEVCTL_PAYLOAD_2048B 0x0080 /* 2048 Bytes */
370 #define PCI_EXP_DEVCTL_PAYLOAD_4096B 0x00a0 /* 4096 Bytes */
371 #define PCI_EXP_DEVCTL_RELAX_EN 0x0010 /* Enable relaxed ordering */
372 #define PCI_EXP_DEVCTL_NOSNOOP_EN 0x0800 /* Enable No Snoop */
373 #define PCI_EXP_DEVCTL_READRQ 0x7000 /* Max_Read_Request_Size */
374 #define PCI_EXP_DEVCTL_READRQ_128B 0x0000 /* 128 Bytes */
375 #define PCI_EXP_DEVCTL_READRQ_256B 0x1000 /* 256 Bytes */
376 #define PCI_EXP_DEVCTL_READRQ_512B 0x2000 /* 512 Bytes */
377 #define PCI_EXP_DEVCTL_READRQ_1024B 0x3000 /* 1024 Bytes */
378 #define PCI_EXP_DEVCTL_READRQ_2048B 0x4000 /* 2048 Bytes */
379 #define PCI_EXP_DEVCTL_READRQ_4096B 0x5000 /* 4096 Bytes */
380 #define PCI_EXP_DEVCTL_BCR_FLR 0x8000 /* Bridge Configuration Retry / FLR */
381 #define PCI_EXP_LNKCAP 12 /* Link Capabilities */
382 #define PCI_EXP_LNKCAP_SLS 0x0000000f /* Supported Link Speeds */
383 #define PCI_EXP_LNKCAP_SLS_2_5GB 0x00000001 /* LNKCAP2 SLS Vector bit 0 */
384 #define PCI_EXP_LNKCAP_SLS_5_0GB 0x00000002 /* LNKCAP2 SLS Vector bit 1 */
385 #define PCI_EXP_LNKCAP_SLS_8_0GB 0x00000003 /* LNKCAP2 SLS Vector bit 2 */
386 #define PCI_EXP_LNKCAP_MLW 0x000003f0 /* Maximum Link Width */
387 #define PCI_EXP_LNKCAP_DLLLARC 0x00100000 /* Data Link Layer Link Active Reporting Capable */
388 #define PCI_EXP_LNKCTL 16 /* Link Control */
389 #define PCI_EXP_LNKCTL_RL 0x0020 /* Retrain Link */
390 #define PCI_EXP_LNKSTA 18 /* Link Status */
391 #define PCI_EXP_LNKSTA_CLS 0x000f /* Current Link Speed */
392 #define PCI_EXP_LNKSTA_CLS_2_5GB 0x0001 /* Current Link Speed 2.5GT/s */
393 #define PCI_EXP_LNKSTA_CLS_5_0GB 0x0002 /* Current Link Speed 5.0GT/s */
394 #define PCI_EXP_LNKSTA_CLS_8_0GB 0x0003 /* Current Link Speed 8.0GT/s */
395 #define PCI_EXP_LNKSTA_NLW 0x03f0 /* Negotiated Link Width */
396 #define PCI_EXP_LNKSTA_NLW_SHIFT 4 /* start of NLW mask in link status */
397 #define PCI_EXP_LNKSTA_LT 0x0800 /* Link Training */
398 #define PCI_EXP_LNKSTA_DLLLA 0x2000 /* Data Link Layer Link Active */
399 #define PCI_EXP_LNKSTA_LBMS 0x4000 /* Link Bandwidth Management Status */
400 #define PCI_EXP_SLTCAP 20 /* Slot Capabilities */
401 #define PCI_EXP_SLTCAP_PSN 0xfff80000 /* Physical Slot Number */
402 #define PCI_EXP_RTCTL 28 /* Root Control */
403 #define PCI_EXP_RTCTL_CRSSVE 0x0010 /* CRS Software Visibility Enable */
404 #define PCI_EXP_RTCAP 30 /* Root Capabilities */
405 #define PCI_EXP_RTCAP_CRSVIS 0x0001 /* CRS Software Visibility capability */
406 #define PCI_EXP_DEVCAP2 36 /* Device Capabilities 2 */
407 #define PCI_EXP_DEVCAP2_ARI 0x00000020 /* ARI Forwarding Supported */
408 #define PCI_EXP_DEVCTL2 40 /* Device Control 2 */
409 #define PCI_EXP_DEVCTL2_ARI 0x0020 /* Alternative Routing-ID */
410 #define PCI_EXP_LNKCAP2 44 /* Link Capability 2 */
411 #define PCI_EXP_LNKCAP2_SLS 0x000000fe /* Supported Link Speeds Vector */
412 #define PCI_EXP_LNKCTL2 48 /* Link Control 2 */
413 #define PCI_EXP_LNKCTL2_TLS 0x000f /* Target Link Speed */
414 #define PCI_EXP_LNKCTL2_TLS_2_5GT 0x0001 /* Target Link Speed 2.5GT/s */
415 #define PCI_EXP_LNKCTL2_TLS_5_0GT 0x0002 /* Target Link Speed 5.0GT/s */
416 #define PCI_EXP_LNKCTL2_TLS_8_0GT 0x0003 /* Target Link Speed 8.0GT/s */
418 /* Advanced Error Reporting */
419 #define PCI_ERR_CAP 24 /* Advanced Error Capabilities */
420 #define PCI_ERR_CAP_FEP(x) ((x) & 31) /* First Error Pointer */
421 #define PCI_ERR_CAP_ECRC_GENC 0x00000020 /* ECRC Generation Capable */
422 #define PCI_ERR_CAP_ECRC_GENE 0x00000040 /* ECRC Generation Enable */
423 #define PCI_ERR_CAP_ECRC_CHKC 0x00000080 /* ECRC Check Capable */
424 #define PCI_ERR_CAP_ECRC_CHKE 0x00000100 /* ECRC Check Enable */
426 /* Single Root I/O Virtualization Registers */
427 #define PCI_SRIOV_CAP 0x04 /* SR-IOV Capabilities */
428 #define PCI_SRIOV_CTRL 0x08 /* SR-IOV Control */
429 #define PCI_SRIOV_CTRL_VFE 0x01 /* VF Enable */
430 #define PCI_SRIOV_CTRL_MSE 0x08 /* VF Memory Space Enable */
431 #define PCI_SRIOV_CTRL_ARI 0x10 /* ARI Capable Hierarchy */
432 #define PCI_SRIOV_INITIAL_VF 0x0c /* Initial VFs */
433 #define PCI_SRIOV_TOTAL_VF 0x0e /* Total VFs */
434 #define PCI_SRIOV_NUM_VF 0x10 /* Number of VFs */
435 #define PCI_SRIOV_VF_OFFSET 0x14 /* First VF Offset */
436 #define PCI_SRIOV_VF_STRIDE 0x16 /* Following VF Stride */
437 #define PCI_SRIOV_VF_DID 0x1a /* VF Device ID */
439 /* Include the ID list */
444 * Config Address for PCI Configuration Mechanism #1
446 * See PCI Local Bus Specification, Revision 3.0,
447 * Section 3.2.2.3.2, Figure 3-2, p. 50.
450 #define PCI_CONF1_BUS_SHIFT 16 /* Bus number */
451 #define PCI_CONF1_DEV_SHIFT 11 /* Device number */
452 #define PCI_CONF1_FUNC_SHIFT 8 /* Function number */
454 #define PCI_CONF1_BUS_MASK 0xff
455 #define PCI_CONF1_DEV_MASK 0x1f
456 #define PCI_CONF1_FUNC_MASK 0x7
457 #define PCI_CONF1_REG_MASK 0xfc /* Limit aligned offset to a maximum of 256B */
459 #define PCI_CONF1_ENABLE BIT(31)
460 #define PCI_CONF1_BUS(x) (((x) & PCI_CONF1_BUS_MASK) << PCI_CONF1_BUS_SHIFT)
461 #define PCI_CONF1_DEV(x) (((x) & PCI_CONF1_DEV_MASK) << PCI_CONF1_DEV_SHIFT)
462 #define PCI_CONF1_FUNC(x) (((x) & PCI_CONF1_FUNC_MASK) << PCI_CONF1_FUNC_SHIFT)
463 #define PCI_CONF1_REG(x) ((x) & PCI_CONF1_REG_MASK)
465 #define PCI_CONF1_ADDRESS(bus, dev, func, reg) \
466 (PCI_CONF1_ENABLE | \
467 PCI_CONF1_BUS(bus) | \
468 PCI_CONF1_DEV(dev) | \
469 PCI_CONF1_FUNC(func) | \
473 * Extension of PCI Config Address for accessing extended PCIe registers
475 * No standardized specification, but used on lot of non-ECAM-compliant ARM SoCs
476 * or on AMD Barcelona and new CPUs. Reserved bits [27:24] of PCI Config Address
477 * are used for specifying additional 4 high bits of PCI Express register.
480 #define PCI_CONF1_EXT_REG_SHIFT 16
481 #define PCI_CONF1_EXT_REG_MASK 0xf00
482 #define PCI_CONF1_EXT_REG(x) (((x) & PCI_CONF1_EXT_REG_MASK) << PCI_CONF1_EXT_REG_SHIFT)
484 #define PCI_CONF1_EXT_ADDRESS(bus, dev, func, reg) \
485 (PCI_CONF1_ADDRESS(bus, dev, func, reg) | \
486 PCI_CONF1_EXT_REG(reg))
489 * Enhanced Configuration Access Mechanism (ECAM)
491 * See PCI Express Base Specification, Revision 5.0, Version 1.0,
492 * Section 7.2.2, Table 7-1, p. 677.
494 #define PCIE_ECAM_BUS_SHIFT 20 /* Bus number */
495 #define PCIE_ECAM_DEV_SHIFT 15 /* Device number */
496 #define PCIE_ECAM_FUNC_SHIFT 12 /* Function number */
498 #define PCIE_ECAM_BUS_MASK 0xff
499 #define PCIE_ECAM_DEV_MASK 0x1f
500 #define PCIE_ECAM_FUNC_MASK 0x7
501 #define PCIE_ECAM_REG_MASK 0xfff /* Limit offset to a maximum of 4K */
503 #define PCIE_ECAM_BUS(x) (((x) & PCIE_ECAM_BUS_MASK) << PCIE_ECAM_BUS_SHIFT)
504 #define PCIE_ECAM_DEV(x) (((x) & PCIE_ECAM_DEV_MASK) << PCIE_ECAM_DEV_SHIFT)
505 #define PCIE_ECAM_FUNC(x) (((x) & PCIE_ECAM_FUNC_MASK) << PCIE_ECAM_FUNC_SHIFT)
506 #define PCIE_ECAM_REG(x) ((x) & PCIE_ECAM_REG_MASK)
508 #define PCIE_ECAM_OFFSET(bus, dev, func, where) \
509 (PCIE_ECAM_BUS(bus) | \
510 PCIE_ECAM_DEV(dev) | \
511 PCIE_ECAM_FUNC(func) | \
512 PCIE_ECAM_REG(where))
518 #ifdef CONFIG_SYS_PCI_64BIT
519 typedef u64 pci_addr_t;
520 typedef u64 pci_size_t;
522 typedef unsigned long pci_addr_t;
523 typedef unsigned long pci_size_t;
527 pci_addr_t bus_start; /* Start on the bus */
528 phys_addr_t phys_start; /* Start in physical address space */
529 pci_size_t size; /* Size */
530 unsigned long flags; /* Resource flags */
532 pci_addr_t bus_lower;
535 #define PCI_REGION_MEM 0x00000000 /* PCI memory space */
536 #define PCI_REGION_IO 0x00000001 /* PCI IO space */
537 #define PCI_REGION_TYPE 0x00000001
538 #define PCI_REGION_PREFETCH 0x00000008 /* prefetchable PCI memory */
540 #define PCI_REGION_SYS_MEMORY 0x00000100 /* System memory */
541 #define PCI_REGION_RO 0x00000200 /* Read-only memory */
543 static inline void pci_set_region(struct pci_region *reg,
544 pci_addr_t bus_start,
545 phys_addr_t phys_start,
547 unsigned long flags) {
548 reg->bus_start = bus_start;
549 reg->phys_start = phys_start;
554 typedef int pci_dev_t;
556 #define PCI_BUS(d) (((d) >> 16) & 0xff)
559 * Please note the difference in DEVFN usage in U-Boot vs Linux. U-Boot
560 * uses DEVFN in bits 15-8 but Linux instead expects DEVFN in bits 7-0.
561 * Please see the Linux header include/uapi/linux/pci.h for more details.
562 * This is relevant for the following macros:
563 * PCI_DEV, PCI_FUNC, PCI_DEVFN
564 * The U-Boot macro PCI_DEV is equivalent to the Linux PCI_SLOT version with
565 * the remark from above (input is in bits 15-8 instead of 7-0.
567 #define PCI_DEV(d) (((d) >> 11) & 0x1f)
568 #define PCI_FUNC(d) (((d) >> 8) & 0x7)
569 #define PCI_DEVFN(d, f) ((d) << 11 | (f) << 8)
571 #define PCI_MASK_BUS(bdf) ((bdf) & 0xffff)
572 #define PCI_ADD_BUS(bus, devfn) (((bus) << 16) | (devfn))
573 #define PCI_BDF(b, d, f) ((b) << 16 | PCI_DEVFN(d, f))
574 #define PCI_ANY_ID (~0)
576 /* Convert from Linux format to U-Boot format */
577 #define PCI_TO_BDF(val) ((val) << 8)
579 struct pci_device_id {
580 unsigned int vendor, device; /* Vendor and device ID or PCI_ANY_ID */
581 unsigned int subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
582 unsigned int class, class_mask; /* (class,subclass,prog-if) triplet */
583 unsigned long driver_data; /* Data private to the driver */
586 struct pci_controller;
588 struct pci_config_table {
589 unsigned int vendor, device; /* Vendor and device ID or PCI_ANY_ID */
590 unsigned int class; /* Class ID, or PCI_ANY_ID */
591 unsigned int bus; /* Bus number, or PCI_ANY_ID */
592 unsigned int dev; /* Device number, or PCI_ANY_ID */
593 unsigned int func; /* Function number, or PCI_ANY_ID */
595 void (*config_device)(struct pci_controller* hose, pci_dev_t dev,
596 struct pci_config_table *);
597 unsigned long priv[3];
600 extern void pci_cfgfunc_do_nothing(struct pci_controller* hose, pci_dev_t dev,
601 struct pci_config_table *);
602 extern void pci_cfgfunc_config_device(struct pci_controller* hose, pci_dev_t dev,
603 struct pci_config_table *);
605 #define INDIRECT_TYPE_NO_PCIE_LINK 1
608 * Structure of a PCI controller (host bridge)
610 * With driver model this is dev_get_uclass_priv(bus)
612 * @skip_auto_config_until_reloc: true to avoid auto-config until U-Boot has
613 * relocated. Normally if PCI is used before relocation, this happens
614 * before relocation also. Some platforms set up static configuration in
615 * TPL/SPL to reduce code size and boot time, since these phases only know
616 * about a small subset of PCI devices. This is normally false.
618 struct pci_controller {
620 struct udevice *ctlr;
621 bool skip_auto_config_until_reloc;
626 volatile unsigned int *cfg_addr;
627 volatile unsigned char *cfg_data;
632 * TODO(sjg@chromium.org): With driver model we use struct
633 * pci_controller for both the controller and any bridge devices
634 * attached to it. But there is only one region list and it is in the
635 * top-level controller.
637 * This could be changed so that struct pci_controller is only used
638 * for PCI controllers and a separate UCLASS (or perhaps
639 * UCLASS_PCI_GENERIC) is used for bridges.
641 struct pci_region *regions;
644 struct pci_config_table *config_table;
646 void (*fixup_irq)(struct pci_controller *, pci_dev_t);
648 /* Used by auto config */
649 struct pci_region *pci_mem, *pci_io, *pci_prefetch;
652 #if defined(CONFIG_DM_PCI_COMPAT)
653 extern phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose,
654 pci_addr_t addr, unsigned long flags);
655 extern pci_addr_t pci_hose_phys_to_bus(struct pci_controller* hose,
656 phys_addr_t addr, unsigned long flags);
658 #define pci_phys_to_bus(dev, addr, flags) \
659 pci_hose_phys_to_bus(pci_bus_to_hose(PCI_BUS(dev)), (addr), (flags))
660 #define pci_bus_to_phys(dev, addr, flags) \
661 pci_hose_bus_to_phys(pci_bus_to_hose(PCI_BUS(dev)), (addr), (flags))
663 #define pci_virt_to_bus(dev, addr, flags) \
664 pci_hose_phys_to_bus(pci_bus_to_hose(PCI_BUS(dev)), \
665 (virt_to_phys(addr)), (flags))
666 #define pci_bus_to_virt(dev, addr, flags, len, map_flags) \
667 map_physmem(pci_hose_bus_to_phys(pci_bus_to_hose(PCI_BUS(dev)), \
671 #define pci_phys_to_mem(dev, addr) \
672 pci_phys_to_bus((dev), (addr), PCI_REGION_MEM)
673 #define pci_mem_to_phys(dev, addr) \
674 pci_bus_to_phys((dev), (addr), PCI_REGION_MEM)
675 #define pci_phys_to_io(dev, addr) pci_phys_to_bus((dev), (addr), PCI_REGION_IO)
676 #define pci_io_to_phys(dev, addr) pci_bus_to_phys((dev), (addr), PCI_REGION_IO)
678 #define pci_virt_to_mem(dev, addr) \
679 pci_virt_to_bus((dev), (addr), PCI_REGION_MEM)
680 #define pci_mem_to_virt(dev, addr, len, map_flags) \
681 pci_bus_to_virt((dev), (addr), PCI_REGION_MEM, (len), (map_flags))
682 #define pci_virt_to_io(dev, addr) \
683 pci_virt_to_bus((dev), (addr), PCI_REGION_IO)
684 #define pci_io_to_virt(dev, addr, len, map_flags) \
685 pci_bus_to_virt((dev), (addr), PCI_REGION_IO, (len), (map_flags))
687 /* For driver model these are defined in macros in pci_compat.c */
688 extern int pci_hose_read_config_byte(struct pci_controller *hose,
689 pci_dev_t dev, int where, u8 *val);
690 extern int pci_hose_read_config_word(struct pci_controller *hose,
691 pci_dev_t dev, int where, u16 *val);
692 extern int pci_hose_read_config_dword(struct pci_controller *hose,
693 pci_dev_t dev, int where, u32 *val);
694 extern int pci_hose_write_config_byte(struct pci_controller *hose,
695 pci_dev_t dev, int where, u8 val);
696 extern int pci_hose_write_config_word(struct pci_controller *hose,
697 pci_dev_t dev, int where, u16 val);
698 extern int pci_hose_write_config_dword(struct pci_controller *hose,
699 pci_dev_t dev, int where, u32 val);
702 void pciauto_region_init(struct pci_region *res);
703 void pciauto_region_align(struct pci_region *res, pci_size_t size);
704 void pciauto_config_init(struct pci_controller *hose);
707 * pciauto_region_allocate() - Allocate resources from a PCI resource region
709 * Allocates @size bytes from the PCI resource @res. If @supports_64bit is
710 * false, the result will be guaranteed to fit in 32 bits.
712 * @res: PCI region to allocate from
713 * @size: Amount of bytes to allocate
714 * @bar: Returns the PCI bus address of the allocated resource
715 * @supports_64bit: Whether to allow allocations above the 32-bit boundary
716 * Return: 0 if successful, -1 on failure
718 int pciauto_region_allocate(struct pci_region *res, pci_size_t size,
719 pci_addr_t *bar, bool supports_64bit);
720 int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev);
722 #if defined(CONFIG_DM_PCI_COMPAT)
723 extern int pci_hose_read_config_byte_via_dword(struct pci_controller *hose,
724 pci_dev_t dev, int where, u8 *val);
725 extern int pci_hose_read_config_word_via_dword(struct pci_controller *hose,
726 pci_dev_t dev, int where, u16 *val);
727 extern int pci_hose_write_config_byte_via_dword(struct pci_controller *hose,
728 pci_dev_t dev, int where, u8 val);
729 extern int pci_hose_write_config_word_via_dword(struct pci_controller *hose,
730 pci_dev_t dev, int where, u16 val);
732 extern void *pci_map_bar(pci_dev_t pdev, int bar, int flags);
733 extern void pci_register_hose(struct pci_controller* hose);
734 extern struct pci_controller* pci_bus_to_hose(int bus);
735 extern struct pci_controller *find_hose_by_cfg_addr(void *cfg_addr);
736 extern struct pci_controller *pci_get_hose_head(void);
738 extern int pci_hose_scan(struct pci_controller *hose);
739 extern int pci_hose_scan_bus(struct pci_controller *hose, int bus);
741 extern void pciauto_setup_device(struct pci_controller *hose,
742 pci_dev_t dev, int bars_num,
743 struct pci_region *mem,
744 struct pci_region *prefetch,
745 struct pci_region *io);
746 extern void pciauto_prescan_setup_bridge(struct pci_controller *hose,
747 pci_dev_t dev, int sub_bus);
748 extern void pciauto_postscan_setup_bridge(struct pci_controller *hose,
749 pci_dev_t dev, int sub_bus);
750 extern int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);
752 extern pci_dev_t pci_find_device (unsigned int vendor, unsigned int device, int index);
753 extern pci_dev_t pci_find_devices (struct pci_device_id *ids, int index);
754 pci_dev_t pci_find_class(unsigned int find_class, int index);
756 extern int pci_hose_find_capability(struct pci_controller *hose, pci_dev_t dev,
758 extern int pci_hose_find_cap_start(struct pci_controller *hose, pci_dev_t dev,
760 extern int pci_find_cap(struct pci_controller *hose, pci_dev_t dev, int pos,
763 int pci_find_next_ext_capability(struct pci_controller *hose,
764 pci_dev_t dev, int start, int cap);
765 int pci_hose_find_ext_capability(struct pci_controller *hose,
766 pci_dev_t dev, int cap);
768 #endif /* defined(CONFIG_DM_PCI_COMPAT) */
770 const char * pci_class_str(u8 class);
771 int pci_last_busno(void);
773 #ifdef CONFIG_MPC85xx
774 extern void pci_mpc85xx_init (struct pci_controller *hose);
778 * pci_write_bar32() - Write the address of a BAR including control bits
780 * This writes a raw address (with control bits) to a bar. This can be used
781 * with devices which require hard-coded addresses, not part of the normal
782 * PCI enumeration process.
784 * This is only available if CONFIG_DM_PCI_COMPAT is enabled
786 * @hose: PCI hose to use
787 * @dev: PCI device to update
788 * @barnum: BAR number (0-5)
789 * @addr: BAR address with control bits
791 void pci_write_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum,
795 * pci_read_bar32() - read the address of a bar
797 * This is only available if CONFIG_DM_PCI_COMPAT is enabled
799 * @hose: PCI hose to use
800 * @dev: PCI device to inspect
801 * @barnum: BAR number (0-5)
802 * Return: address of the bar, masking out any control bits
804 u32 pci_read_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum);
807 * pci_hose_find_devices() - Find devices by vendor/device ID
809 * This is only available if CONFIG_DM_PCI_COMPAT is enabled
811 * @hose: PCI hose to search
812 * @busnum: Bus number to search
813 * @ids: PCI vendor/device IDs to look for, terminated by 0, 0 record
814 * @indexp: Pointer to device index to find. To find the first matching
815 * device, pass 0; to find the second, pass 1, etc. This
816 * parameter is decremented for each non-matching device so
817 * can be called repeatedly.
819 pci_dev_t pci_hose_find_devices(struct pci_controller *hose, int busnum,
820 struct pci_device_id *ids, int *indexp);
822 /* Access sizes for PCI reads and writes */
832 * struct pci_child_plat - information stored about each PCI device
834 * Every device on a PCI bus has this per-child data.
836 * It can be accessed using dev_get_parent_plat(dev) if dev->parent is a
837 * PCI bus (i.e. UCLASS_PCI)
839 * @devfn: Encoded device and function index - see PCI_DEVFN()
840 * @vendor: PCI vendor ID (see pci_ids.h)
841 * @device: PCI device ID (see pci_ids.h)
842 * @class: PCI class, 3 bytes: (base, sub, prog-if)
843 * @is_virtfn: True for Virtual Function device
844 * @pfdev: Handle to Physical Function device
845 * @virtid: Virtual Function Index
847 struct pci_child_plat {
849 unsigned short vendor;
850 unsigned short device;
853 /* Variables for CONFIG_PCI_SRIOV */
855 struct udevice *pfdev;
859 /* PCI bus operations */
862 * read_config() - Read a PCI configuration value
864 * PCI buses must support reading and writing configuration values
865 * so that the bus can be scanned and its devices configured.
867 * Normally PCI_BUS(@bdf) is the same as @dev_seq(bus), but not always.
868 * If bridges exist it is possible to use the top-level bus to
869 * access a sub-bus. In that case @bus will be the top-level bus
870 * and PCI_BUS(bdf) will be a different (higher) value
872 * @bus: Bus to read from
873 * @bdf: Bus, device and function to read
874 * @offset: Byte offset within the device's configuration space
875 * @valuep: Place to put the returned value
877 * @return 0 if OK, -ve on error
879 int (*read_config)(const struct udevice *bus, pci_dev_t bdf,
880 uint offset, ulong *valuep, enum pci_size_t size);
882 * write_config() - Write a PCI configuration value
884 * @bus: Bus to write to
885 * @bdf: Bus, device and function to write
886 * @offset: Byte offset within the device's configuration space
887 * @value: Value to write
889 * @return 0 if OK, -ve on error
891 int (*write_config)(struct udevice *bus, pci_dev_t bdf, uint offset,
892 ulong value, enum pci_size_t size);
895 /* Get access to a PCI bus' operations */
896 #define pci_get_ops(dev) ((struct dm_pci_ops *)(dev)->driver->ops)
899 * dm_pci_get_bdf() - Get the BDF value for a device
901 * @dev: Device to check
902 * Return: bus/device/function value (see PCI_BDF())
904 pci_dev_t dm_pci_get_bdf(const struct udevice *dev);
907 * pci_bind_bus_devices() - scan a PCI bus and bind devices
909 * Scan a PCI bus looking for devices. Bind each one that is found. If
910 * devices are already bound that match the scanned devices, just update the
911 * child data so that the device can be used correctly (this happens when
912 * the device tree describes devices we expect to see on the bus).
914 * Devices that are bound in this way will use a generic PCI driver which
915 * does nothing. The device can still be accessed but will not provide any
918 * @bus: Bus containing devices to bind
919 * Return: 0 if OK, -ve on error
921 int pci_bind_bus_devices(struct udevice *bus);
924 * pci_auto_config_devices() - configure bus devices ready for use
926 * This works through all devices on a bus by scanning the driver model
927 * data structures (normally these have been set up by pci_bind_bus_devices()
930 * Space is allocated for each PCI base address register (BAR) so that the
931 * devices are mapped into memory and I/O space ready for use.
933 * @bus: Bus containing devices to bind
934 * Return: 0 if OK, -ve on error
936 int pci_auto_config_devices(struct udevice *bus);
939 * dm_pci_bus_find_bdf() - Find a device given its PCI bus address
941 * @bdf: PCI device address: bus, device and function -see PCI_BDF()
942 * @devp: Returns the device for this address, if found
943 * Return: 0 if OK, -ENODEV if not found
945 int dm_pci_bus_find_bdf(pci_dev_t bdf, struct udevice **devp);
948 * pci_bus_find_devfn() - Find a device on a bus
950 * @find_devfn: PCI device address (device and function only)
951 * @devp: Returns the device for this address, if found
952 * Return: 0 if OK, -ENODEV if not found
954 int pci_bus_find_devfn(const struct udevice *bus, pci_dev_t find_devfn,
955 struct udevice **devp);
958 * pci_find_first_device() - return the first available PCI device
960 * This function and pci_find_first_device() allow iteration through all
961 * available PCI devices on all buses. Assuming there are any, this will
962 * return the first one.
964 * @devp: Set to the first available device, or NULL if no more are left
966 * Return: 0 if all is OK, -ve on error (e.g. a bus/bridge failed to probe)
968 int pci_find_first_device(struct udevice **devp);
971 * pci_find_next_device() - return the next available PCI device
973 * Finds the next available PCI device after the one supplied, or sets @devp
974 * to NULL if there are no more.
976 * @devp: On entry, the last device returned. Set to the next available
977 * device, or NULL if no more are left or we got an error
978 * Return: 0 if all is OK, -ve on error (e.g. a bus/bridge failed to probe)
980 int pci_find_next_device(struct udevice **devp);
983 * pci_get_ff() - Returns a mask for the given access size
986 * Return: 0xff for PCI_SIZE_8, 0xffff for PCI_SIZE_16, 0xffffffff for
989 int pci_get_ff(enum pci_size_t size);
992 * pci_bus_find_devices () - Find devices on a bus
994 * @bus: Bus to search
995 * @ids: PCI vendor/device IDs to look for, terminated by 0, 0 record
996 * @indexp: Pointer to device index to find. To find the first matching
997 * device, pass 0; to find the second, pass 1, etc. This
998 * parameter is decremented for each non-matching device so
999 * can be called repeatedly.
1000 * @devp: Returns matching device if found
1001 * Return: 0 if found, -ENODEV if not
1003 int pci_bus_find_devices(struct udevice *bus, const struct pci_device_id *ids,
1004 int *indexp, struct udevice **devp);
1007 * pci_find_device_id() - Find a device on any bus
1009 * @ids: PCI vendor/device IDs to look for, terminated by 0, 0 record
1010 * @index: Index number of device to find, 0 for the first match, 1 for
1012 * @devp: Returns matching device if found
1013 * Return: 0 if found, -ENODEV if not
1015 int pci_find_device_id(const struct pci_device_id *ids, int index,
1016 struct udevice **devp);
1019 * dm_pci_hose_probe_bus() - probe a subordinate bus, scanning it for devices
1021 * This probes the given bus which causes it to be scanned for devices. The
1022 * devices will be bound but not probed.
1024 * @hose specifies the PCI hose that will be used for the scan. This is
1025 * always a top-level bus with uclass UCLASS_PCI. The bus to scan is
1026 * in @bdf, and is a subordinate bus reachable from @hose.
1028 * @hose: PCI hose to scan
1029 * @bdf: PCI bus address to scan (PCI_BUS(bdf) is the bus number)
1030 * Return: 0 if OK, -ve on error
1032 int dm_pci_hose_probe_bus(struct udevice *bus);
1035 * pci_bus_read_config() - Read a configuration value from a device
1037 * TODO(sjg@chromium.org): We should be able to pass just a device and have
1038 * it do the right thing. It would be good to have that function also.
1040 * @bus: Bus to read from
1041 * @bdf: PCI device address: bus, device and function -see PCI_BDF()
1042 * @offset: Register offset to read
1043 * @valuep: Place to put the returned value
1044 * @size: Access size
1045 * Return: 0 if OK, -ve on error
1047 int pci_bus_read_config(const struct udevice *bus, pci_dev_t bdf, int offset,
1048 unsigned long *valuep, enum pci_size_t size);
1051 * pci_bus_write_config() - Write a configuration value to a device
1053 * @bus: Bus to write from
1054 * @bdf: PCI device address: bus, device and function -see PCI_BDF()
1055 * @offset: Register offset to write
1056 * @value: Value to write
1057 * @size: Access size
1058 * Return: 0 if OK, -ve on error
1060 int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset,
1061 unsigned long value, enum pci_size_t size);
1064 * pci_bus_clrset_config32() - Update a configuration value for a device
1066 * The register at @offset is updated to (oldvalue & ~clr) | set.
1068 * @bus: Bus to access
1069 * @bdf: PCI device address: bus, device and function -see PCI_BDF()
1070 * @offset: Register offset to update
1071 * @clr: Bits to clear
1073 * Return: 0 if OK, -ve on error
1075 int pci_bus_clrset_config32(struct udevice *bus, pci_dev_t bdf, int offset,
1079 * Driver model PCI config access functions. Use these in preference to others
1080 * when you have a valid device
1082 int dm_pci_read_config(const struct udevice *dev, int offset,
1083 unsigned long *valuep, enum pci_size_t size);
1085 int dm_pci_read_config8(const struct udevice *dev, int offset, u8 *valuep);
1086 int dm_pci_read_config16(const struct udevice *dev, int offset, u16 *valuep);
1087 int dm_pci_read_config32(const struct udevice *dev, int offset, u32 *valuep);
1089 int dm_pci_write_config(struct udevice *dev, int offset, unsigned long value,
1090 enum pci_size_t size);
1092 int dm_pci_write_config8(struct udevice *dev, int offset, u8 value);
1093 int dm_pci_write_config16(struct udevice *dev, int offset, u16 value);
1094 int dm_pci_write_config32(struct udevice *dev, int offset, u32 value);
1097 * These permit convenient read/modify/write on PCI configuration. The
1098 * register is updated to (oldvalue & ~clr) | set.
1100 int dm_pci_clrset_config8(struct udevice *dev, int offset, u32 clr, u32 set);
1101 int dm_pci_clrset_config16(struct udevice *dev, int offset, u32 clr, u32 set);
1102 int dm_pci_clrset_config32(struct udevice *dev, int offset, u32 clr, u32 set);
1105 * The following functions provide access to the above without needing the
1106 * size parameter. We are trying to encourage the use of the 8/16/32-style
1107 * functions, rather than byte/word/dword. But both are supported.
1109 int pci_write_config32(pci_dev_t pcidev, int offset, u32 value);
1110 int pci_write_config16(pci_dev_t pcidev, int offset, u16 value);
1111 int pci_write_config8(pci_dev_t pcidev, int offset, u8 value);
1112 int pci_read_config32(pci_dev_t pcidev, int offset, u32 *valuep);
1113 int pci_read_config16(pci_dev_t pcidev, int offset, u16 *valuep);
1114 int pci_read_config8(pci_dev_t pcidev, int offset, u8 *valuep);
1117 * pci_generic_mmap_write_config() - Generic helper for writing to
1118 * memory-mapped PCI configuration space.
1119 * @bus: Pointer to the PCI bus
1120 * @addr_f: Callback for calculating the config space address
1121 * @bdf: Identifies the PCI device to access
1122 * @offset: The offset into the device's configuration space
1123 * @value: The value to write
1124 * @size: Indicates the size of access to perform
1126 * Write the value @value of size @size from offset @offset within the
1127 * configuration space of the device identified by the bus, device & function
1128 * numbers in @bdf on the PCI bus @bus. The callback function @addr_f is
1129 * responsible for calculating the CPU address of the respective configuration
1132 * Return: 0 on success, else -EINVAL
1134 int pci_generic_mmap_write_config(
1135 const struct udevice *bus,
1136 int (*addr_f)(const struct udevice *bus, pci_dev_t bdf, uint offset,
1141 enum pci_size_t size);
1144 * pci_generic_mmap_read_config() - Generic helper for reading from
1145 * memory-mapped PCI configuration space.
1146 * @bus: Pointer to the PCI bus
1147 * @addr_f: Callback for calculating the config space address
1148 * @bdf: Identifies the PCI device to access
1149 * @offset: The offset into the device's configuration space
1150 * @valuep: A pointer at which to store the read value
1151 * @size: Indicates the size of access to perform
1153 * Read a value of size @size from offset @offset within the configuration
1154 * space of the device identified by the bus, device & function numbers in @bdf
1155 * on the PCI bus @bus. The callback function @addr_f is responsible for
1156 * calculating the CPU address of the respective configuration space offset.
1158 * Return: 0 on success, else -EINVAL
1160 int pci_generic_mmap_read_config(
1161 const struct udevice *bus,
1162 int (*addr_f)(const struct udevice *bus, pci_dev_t bdf, uint offset,
1167 enum pci_size_t size);
1169 #if defined(CONFIG_PCI_SRIOV)
1171 * pci_sriov_init() - Scan Virtual Function devices
1173 * @pdev: Physical Function udevice handle
1174 * @vf_en: Number of Virtual Function devices to enable
1175 * Return: 0 on success, -ve on error
1177 int pci_sriov_init(struct udevice *pdev, int vf_en);
1180 * pci_sriov_get_totalvfs() - Get total available Virtual Function devices
1182 * @pdev: Physical Function udevice handle
1183 * Return: count on success, -ve on error
1185 int pci_sriov_get_totalvfs(struct udevice *pdev);
1188 #ifdef CONFIG_DM_PCI_COMPAT
1189 /* Compatibility with old naming */
1190 static inline int pci_write_config_dword(pci_dev_t pcidev, int offset,
1193 return pci_write_config32(pcidev, offset, value);
1196 /* Compatibility with old naming */
1197 static inline int pci_write_config_word(pci_dev_t pcidev, int offset,
1200 return pci_write_config16(pcidev, offset, value);
1203 /* Compatibility with old naming */
1204 static inline int pci_write_config_byte(pci_dev_t pcidev, int offset,
1207 return pci_write_config8(pcidev, offset, value);
1210 /* Compatibility with old naming */
1211 static inline int pci_read_config_dword(pci_dev_t pcidev, int offset,
1214 return pci_read_config32(pcidev, offset, valuep);
1217 /* Compatibility with old naming */
1218 static inline int pci_read_config_word(pci_dev_t pcidev, int offset,
1221 return pci_read_config16(pcidev, offset, valuep);
1224 /* Compatibility with old naming */
1225 static inline int pci_read_config_byte(pci_dev_t pcidev, int offset,
1228 return pci_read_config8(pcidev, offset, valuep);
1230 #endif /* CONFIG_DM_PCI_COMPAT */
1233 * dm_pciauto_config_device() - configure a device ready for use
1235 * Space is allocated for each PCI base address register (BAR) so that the
1236 * devices are mapped into memory and I/O space ready for use.
1238 * @dev: Device to configure
1239 * Return: 0 if OK, -ve on error
1241 int dm_pciauto_config_device(struct udevice *dev);
1244 * pci_conv_32_to_size() - convert a 32-bit read value to the given size
1246 * Some PCI buses must always perform 32-bit reads. The data must then be
1247 * shifted and masked to reflect the required access size and offset. This
1248 * function performs this transformation.
1250 * @value: Value to transform (32-bit value read from @offset & ~3)
1251 * @offset: Register offset that was read
1252 * @size: Required size of the result
1253 * Return: the value that would have been obtained if the read had been
1254 * performed at the given offset with the correct size
1256 ulong pci_conv_32_to_size(ulong value, uint offset, enum pci_size_t size);
1259 * pci_conv_size_to_32() - update a 32-bit value to prepare for a write
1261 * Some PCI buses must always perform 32-bit writes. To emulate a smaller
1262 * write the old 32-bit data must be read, updated with the required new data
1263 * and written back as a 32-bit value. This function performs the
1264 * transformation from the old value to the new value.
1266 * @value: Value to transform (32-bit value read from @offset & ~3)
1267 * @offset: Register offset that should be written
1268 * @size: Required size of the write
1269 * Return: the value that should be written as a 32-bit access to @offset & ~3.
1271 ulong pci_conv_size_to_32(ulong old, ulong value, uint offset,
1272 enum pci_size_t size);
1275 * pci_get_controller() - obtain the controller to use for a bus
1277 * @dev: Device to check
1278 * Return: pointer to the controller device for this bus
1280 struct udevice *pci_get_controller(struct udevice *dev);
1283 * pci_get_regions() - obtain pointers to all the region types
1285 * @dev: Device to check
1286 * @iop: Returns a pointer to the I/O region, or NULL if none
1287 * @memp: Returns a pointer to the memory region, or NULL if none
1288 * @prefp: Returns a pointer to the pre-fetch region, or NULL if none
1289 * Return: the number of non-NULL regions returned, normally 3
1291 int pci_get_regions(struct udevice *dev, struct pci_region **iop,
1292 struct pci_region **memp, struct pci_region **prefp);
1294 pci_get_dma_regions(struct udevice *dev, struct pci_region *memp, int index);
1296 * dm_pci_write_bar32() - Write the address of a BAR
1298 * This writes a raw address to a bar
1300 * @dev: PCI device to update
1301 * @barnum: BAR number (0-5)
1302 * @addr: BAR address
1304 void dm_pci_write_bar32(struct udevice *dev, int barnum, u32 addr);
1307 * dm_pci_read_bar32() - read a base address register from a device
1309 * @dev: Device to check
1310 * @barnum: Bar number to read (numbered from 0)
1311 * @return: value of BAR
1313 u32 dm_pci_read_bar32(const struct udevice *dev, int barnum);
1316 * dm_pci_bus_to_phys() - convert a PCI bus address range to a physical address
1318 * @dev: Device containing the PCI address
1319 * @addr: PCI address to convert
1320 * @len: Length of the address range
1321 * @mask: Mask to match flags for the region type
1322 * @flags: Flags for the region type (PCI_REGION_...)
1323 * Return: physical address corresponding to that PCI bus address
1325 phys_addr_t dm_pci_bus_to_phys(struct udevice *dev, pci_addr_t addr, size_t len,
1326 unsigned long mask, unsigned long flags);
1329 * dm_pci_phys_to_bus() - convert a physical address to a PCI bus address
1331 * @dev: Device containing the bus address
1332 * @addr: Physical address to convert
1333 * @len: Length of the address range
1334 * @mask: Mask to match flags for the region type
1335 * @flags: Flags for the region type (PCI_REGION_...)
1336 * Return: PCI bus address corresponding to that physical address
1338 pci_addr_t dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t addr, size_t len,
1339 unsigned long mask, unsigned long flags);
1342 * dm_pci_map_bar() - get a virtual address associated with a BAR region
1344 * Looks up a base address register and finds the physical memory address
1345 * that corresponds to it.
1346 * Can be used for 32b BARs 0-5 on type 0 functions and for 32b BARs 0-1 on
1348 * Can also be used on type 0 functions that support Enhanced Allocation for
1349 * 32b/64b BARs. Note that duplicate BEI entries are not supported.
1351 * @dev: Device to check
1352 * @bar: Bar register offset (PCI_BASE_ADDRESS_...)
1353 * @offset: Offset from the base to map
1354 * @len: Length to map
1355 * @mask: Mask to match flags for the region type
1356 * @flags: Flags for the region type (PCI_REGION_...)
1357 * @return: pointer to the virtual address to use or 0 on error
1359 void *dm_pci_map_bar(struct udevice *dev, int bar, size_t offset, size_t len,
1360 unsigned long mask, unsigned long flags);
1363 * dm_pci_find_next_capability() - find a capability starting from an offset
1365 * Tell if a device supports a given PCI capability. Returns the
1366 * address of the requested capability structure within the device's
1367 * PCI configuration space or 0 in case the device does not support it.
1369 * Possible values for @cap:
1371 * %PCI_CAP_ID_MSI Message Signalled Interrupts
1372 * %PCI_CAP_ID_PCIX PCI-X
1373 * %PCI_CAP_ID_EXP PCI Express
1374 * %PCI_CAP_ID_MSIX MSI-X
1376 * See PCI_CAP_ID_xxx for the complete capability ID codes.
1378 * @dev: PCI device to query
1379 * @start: offset to start from
1380 * @cap: capability code
1381 * @return: capability address or 0 if not supported
1383 int dm_pci_find_next_capability(struct udevice *dev, u8 start, int cap);
1386 * dm_pci_find_capability() - find a capability
1388 * Tell if a device supports a given PCI capability. Returns the
1389 * address of the requested capability structure within the device's
1390 * PCI configuration space or 0 in case the device does not support it.
1392 * Possible values for @cap:
1394 * %PCI_CAP_ID_MSI Message Signalled Interrupts
1395 * %PCI_CAP_ID_PCIX PCI-X
1396 * %PCI_CAP_ID_EXP PCI Express
1397 * %PCI_CAP_ID_MSIX MSI-X
1399 * See PCI_CAP_ID_xxx for the complete capability ID codes.
1401 * @dev: PCI device to query
1402 * @cap: capability code
1403 * @return: capability address or 0 if not supported
1405 int dm_pci_find_capability(struct udevice *dev, int cap);
1408 * dm_pci_find_next_ext_capability() - find an extended capability
1409 * starting from an offset
1411 * Tell if a device supports a given PCI express extended capability.
1412 * Returns the address of the requested extended capability structure
1413 * within the device's PCI configuration space or 0 in case the device
1414 * does not support it.
1416 * Possible values for @cap:
1418 * %PCI_EXT_CAP_ID_ERR Advanced Error Reporting
1419 * %PCI_EXT_CAP_ID_VC Virtual Channel
1420 * %PCI_EXT_CAP_ID_DSN Device Serial Number
1421 * %PCI_EXT_CAP_ID_PWR Power Budgeting
1423 * See PCI_EXT_CAP_ID_xxx for the complete extended capability ID codes.
1425 * @dev: PCI device to query
1426 * @start: offset to start from
1427 * @cap: extended capability code
1428 * @return: extended capability address or 0 if not supported
1430 int dm_pci_find_next_ext_capability(struct udevice *dev, int start, int cap);
1433 * dm_pci_find_ext_capability() - find an extended capability
1435 * Tell if a device supports a given PCI express extended capability.
1436 * Returns the address of the requested extended capability structure
1437 * within the device's PCI configuration space or 0 in case the device
1438 * does not support it.
1440 * Possible values for @cap:
1442 * %PCI_EXT_CAP_ID_ERR Advanced Error Reporting
1443 * %PCI_EXT_CAP_ID_VC Virtual Channel
1444 * %PCI_EXT_CAP_ID_DSN Device Serial Number
1445 * %PCI_EXT_CAP_ID_PWR Power Budgeting
1447 * See PCI_EXT_CAP_ID_xxx for the complete extended capability ID codes.
1449 * @dev: PCI device to query
1450 * @cap: extended capability code
1451 * @return: extended capability address or 0 if not supported
1453 int dm_pci_find_ext_capability(struct udevice *dev, int cap);
1456 * dm_pci_flr() - Perform FLR if the device suppoorts it
1458 * @dev: PCI device to reset
1459 * @return: 0 if OK, -ENOENT if FLR is not supported by dev
1461 int dm_pci_flr(struct udevice *dev);
1463 #define dm_pci_virt_to_bus(dev, addr, flags) \
1464 dm_pci_phys_to_bus(dev, (virt_to_phys(addr)), 0, PCI_REGION_TYPE, (flags))
1465 #define dm_pci_bus_to_virt(dev, addr, len, mask, flags, map_flags) \
1467 size_t _len = (len); \
1468 phys_addr_t phys_addr = dm_pci_bus_to_phys((dev), (addr), _len, \
1470 map_physmem(phys_addr, _len, (map_flags)); \
1473 #define dm_pci_phys_to_mem(dev, addr) \
1474 dm_pci_phys_to_bus((dev), (addr), 0, PCI_REGION_TYPE, PCI_REGION_MEM)
1475 #define dm_pci_mem_to_phys(dev, addr) \
1476 dm_pci_bus_to_phys((dev), (addr), 0, PCI_REGION_TYPE, PCI_REGION_MEM)
1477 #define dm_pci_phys_to_io(dev, addr) \
1478 dm_pci_phys_to_bus((dev), (addr), 0, PCI_REGION_TYPE, PCI_REGION_IO)
1479 #define dm_pci_io_to_phys(dev, addr) \
1480 dm_pci_bus_to_phys((dev), (addr), 0, PCI_REGION_TYPE, PCI_REGION_IO)
1482 #define dm_pci_virt_to_mem(dev, addr) \
1483 dm_pci_virt_to_bus((dev), (addr), PCI_REGION_MEM)
1484 #define dm_pci_mem_to_virt(dev, addr, len, map_flags) \
1485 dm_pci_bus_to_virt((dev), (addr), (len), PCI_REGION_TYPE, \
1486 PCI_REGION_MEM, (map_flags))
1487 #define dm_pci_virt_to_io(dev, addr) \
1488 dm_pci_virt_to_bus((dev), (addr), PCI_REGION_IO)
1489 #define dm_pci_io_to_virt(dev, addr, len, map_flags) \
1490 dm_pci_bus_to_virt((dev), (addr), (len), PCI_REGION_TYPE, \
1491 PCI_REGION_IO, (map_flags))
1494 * dm_pci_find_device() - find a device by vendor/device ID
1496 * @vendor: Vendor ID
1497 * @device: Device ID
1498 * @index: 0 to find the first match, 1 for second, etc.
1499 * @devp: Returns pointer to the device, if found
1500 * Return: 0 if found, -ve on error
1502 int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
1503 struct udevice **devp);
1506 * dm_pci_find_class() - find a device by class
1508 * @find_class: 3-byte (24-bit) class value to find
1509 * @index: 0 to find the first match, 1 for second, etc.
1510 * @devp: Returns pointer to the device, if found
1511 * Return: 0 if found, -ve on error
1513 int dm_pci_find_class(uint find_class, int index, struct udevice **devp);
1516 * struct pci_emul_uc_priv - holds info about an emulator device
1518 * There is always at most one emulator per client
1520 * @client: Client device if any, else NULL
1522 struct pci_emul_uc_priv {
1523 struct udevice *client;
1527 * struct dm_pci_emul_ops - PCI device emulator operations
1529 struct dm_pci_emul_ops {
1531 * read_config() - Read a PCI configuration value
1533 * @dev: Emulated device to read from
1534 * @offset: Byte offset within the device's configuration space
1535 * @valuep: Place to put the returned value
1536 * @size: Access size
1537 * @return 0 if OK, -ve on error
1539 int (*read_config)(const struct udevice *dev, uint offset,
1540 ulong *valuep, enum pci_size_t size);
1542 * write_config() - Write a PCI configuration value
1544 * @dev: Emulated device to write to
1545 * @offset: Byte offset within the device's configuration space
1546 * @value: Value to write
1547 * @size: Access size
1548 * @return 0 if OK, -ve on error
1550 int (*write_config)(struct udevice *dev, uint offset, ulong value,
1551 enum pci_size_t size);
1553 * read_io() - Read a PCI I/O value
1555 * @dev: Emulated device to read from
1556 * @addr: I/O address to read
1557 * @valuep: Place to put the returned value
1558 * @size: Access size
1559 * @return 0 if OK, -ENOENT if @addr is not mapped by this device,
1560 * other -ve value on error
1562 int (*read_io)(struct udevice *dev, unsigned int addr, ulong *valuep,
1563 enum pci_size_t size);
1565 * write_io() - Write a PCI I/O value
1567 * @dev: Emulated device to write from
1568 * @addr: I/O address to write
1569 * @value: Value to write
1570 * @size: Access size
1571 * @return 0 if OK, -ENOENT if @addr is not mapped by this device,
1572 * other -ve value on error
1574 int (*write_io)(struct udevice *dev, unsigned int addr,
1575 ulong value, enum pci_size_t size);
1577 * map_physmem() - Map a device into sandbox memory
1579 * @dev: Emulated device to map
1580 * @addr: Memory address, normally corresponding to a PCI BAR.
1581 * The device should have been configured to have a BAR
1583 * @lenp: On entry, the size of the area to map, On exit it is
1584 * updated to the size actually mapped, which may be less
1585 * if the device has less space
1586 * @ptrp: Returns a pointer to the mapped address. The device's
1587 * space can be accessed as @lenp bytes starting here
1588 * @return 0 if OK, -ENOENT if @addr is not mapped by this device,
1589 * other -ve value on error
1591 int (*map_physmem)(struct udevice *dev, phys_addr_t addr,
1592 unsigned long *lenp, void **ptrp);
1594 * unmap_physmem() - undo a memory mapping
1596 * This must be called after map_physmem() to undo the mapping.
1597 * Some devices can use this to check what has been written into
1598 * their mapped memory and perform an operations they require on it.
1599 * In this way, map/unmap can be used as a sort of handshake between
1600 * the emulated device and its users.
1602 * @dev: Emuated device to unmap
1603 * @vaddr: Mapped memory address, as passed to map_physmem()
1604 * @len: Size of area mapped, as returned by map_physmem()
1605 * @return 0 if OK, -ve on error
1607 int (*unmap_physmem)(struct udevice *dev, const void *vaddr,
1611 /* Get access to a PCI device emulator's operations */
1612 #define pci_get_emul_ops(dev) ((struct dm_pci_emul_ops *)(dev)->driver->ops)
1615 * sandbox_pci_get_emul() - Get the emulation device for a PCI device
1617 * Searches for a suitable emulator for the given PCI bus device
1619 * @bus: PCI bus to search
1620 * @find_devfn: PCI device and function address (PCI_DEVFN())
1621 * @containerp: Returns container device if found
1622 * @emulp: Returns emulated device if found
1623 * Return: 0 if found, -ENODEV if not found
1625 int sandbox_pci_get_emul(const struct udevice *bus, pci_dev_t find_devfn,
1626 struct udevice **containerp, struct udevice **emulp);
1629 * sandbox_pci_get_client() - Find the client for an emulation device
1631 * @emul: Emulation device to check
1632 * @devp: Returns the client device emulated by this device
1633 * Return: 0 if OK, -ENOENT if the device has no client yet
1635 int sandbox_pci_get_client(struct udevice *emul, struct udevice **devp);
1638 * board_pci_fixup_dev() - Board callback for PCI device fixups
1643 extern void board_pci_fixup_dev(struct udevice *bus, struct udevice *dev);
1646 * PCI_DEVICE - macro used to describe a specific pci device
1647 * @vend: the 16 bit PCI Vendor ID
1648 * @dev: the 16 bit PCI Device ID
1650 * This macro is used to create a struct pci_device_id that matches a
1651 * specific device. The subvendor and subdevice fields will be set to
1654 #define PCI_DEVICE(vend, dev) \
1655 .vendor = (vend), .device = (dev), \
1656 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
1659 * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
1660 * @vend: the 16 bit PCI Vendor ID
1661 * @dev: the 16 bit PCI Device ID
1662 * @subvend: the 16 bit PCI Subvendor ID
1663 * @subdev: the 16 bit PCI Subdevice ID
1665 * This macro is used to create a struct pci_device_id that matches a
1666 * specific device with subsystem information.
1668 #define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
1669 .vendor = (vend), .device = (dev), \
1670 .subvendor = (subvend), .subdevice = (subdev)
1673 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
1674 * @dev_class: the class, subclass, prog-if triple for this device
1675 * @dev_class_mask: the class mask for this device
1677 * This macro is used to create a struct pci_device_id that matches a
1678 * specific PCI class. The vendor, device, subvendor, and subdevice
1679 * fields will be set to PCI_ANY_ID.
1681 #define PCI_DEVICE_CLASS(dev_class, dev_class_mask) \
1682 .class = (dev_class), .class_mask = (dev_class_mask), \
1683 .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
1684 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID
1687 * PCI_VDEVICE - macro used to describe a specific pci device in short form
1688 * @vend: the vendor name
1689 * @dev: the 16 bit PCI Device ID
1691 * This macro is used to create a struct pci_device_id that matches a
1692 * specific PCI device. The subvendor, and subdevice fields will be set
1693 * to PCI_ANY_ID. The macro allows the next field to follow as the device
1697 #define PCI_VDEVICE(vend, dev) \
1698 .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
1699 .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
1702 * struct pci_driver_entry - Matches a driver to its pci_device_id list
1703 * @driver: Driver to use
1704 * @match: List of match records for this driver, terminated by {}
1706 struct pci_driver_entry {
1707 struct driver *driver;
1708 const struct pci_device_id *match;
1711 #define U_BOOT_PCI_DEVICE(__name, __match) \
1712 ll_entry_declare(struct pci_driver_entry, __name, pci_driver_entry) = {\
1713 .driver = llsym(struct driver, __name, driver), \
1717 #endif /* __ASSEMBLY__ */