2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/queue.h>
35 /* some PCI bus constants */
37 #define PCI_BUSMAX 255 /* highest supported bus number */
38 #define PCI_SLOTMAX 31 /* highest supported slot number */
39 #define PCI_FUNCMAX 7 /* highest supported function number */
40 #define PCI_REGMAX 255 /* highest supported config register addr. */
42 #define PCI_MAXMAPS_0 6 /* max. no. of memory/port maps */
43 #define PCI_MAXMAPS_1 2 /* max. no. of maps for PCI to PCI bridge */
44 #define PCI_MAXMAPS_2 1 /* max. no. of maps for CardBus bridge */
46 typedef uint64_t pci_addr_t;
48 /* Interesting values for PCI power management */
50 uint16_t pp_cap; /* PCI power management capabilities */
51 uint8_t pp_status; /* config space address of PCI power status reg */
52 uint8_t pp_pmcsr; /* config space address of PMCSR reg */
53 uint8_t pp_data; /* config space address of PCI power data reg */
69 uint8_t vpd_reg; /* base register, + 2 for addr, + 4 data */
70 char *vpd_ident; /* string identifier */
72 struct vpd_readonly *vpd_ros;
74 struct vpd_write *vpd_w;
77 /* Interesting values for PCI MSI */
79 uint16_t msi_ctrl; /* Message Control */
80 uint8_t msi_msgnum; /* Number of messages */
81 uint16_t msi_data; /* Location of MSI data word */
84 /* config header information common to all header types */
85 typedef struct pcicfg {
86 struct device *dev; /* device which owns this */
88 uint32_t bar[PCI_MAXMAPS_0]; /* BARs */
89 uint32_t bios; /* BIOS mapping */
91 uint16_t subvendor; /* card vendor ID */
92 uint16_t subdevice; /* card device ID, assigned by card vendor */
93 uint16_t vendor; /* chip vendor ID */
94 uint16_t device; /* chip device ID, assigned by chip vendor */
96 uint16_t cmdreg; /* disable/enable chip and PCI options */
97 uint16_t statreg; /* supported PCI features and error state */
99 uint8_t baseclass; /* chip PCI class */
100 uint8_t subclass; /* chip PCI subclass */
101 uint8_t progif; /* chip PCI programming interface */
102 uint8_t revid; /* chip revision ID */
104 uint8_t hdrtype; /* chip config header type */
105 uint8_t cachelnsz; /* cache line size in 4byte units */
106 uint8_t intpin; /* PCI interrupt pin */
107 uint8_t intline; /* interrupt line (IRQ for PC arch) */
109 uint8_t mingnt; /* min. useful bus grant time in 250ns units */
110 uint8_t maxlat; /* max. tolerated bus grant latency in 250ns */
111 uint8_t lattimer; /* latency timer in units of 30ns bus cycles */
113 uint8_t mfdev; /* multi-function device (from hdrtype reg) */
114 uint8_t nummaps; /* actual number of PCI maps used */
116 uint8_t bus; /* config space bus address */
117 uint8_t slot; /* config space slot address */
118 uint8_t func; /* config space function number */
120 struct pcicfg_pp pp; /* pci power management */
121 struct pcicfg_vpd vpd; /* pci vital product data */
122 struct pcicfg_msi msi; /* pci msi */
125 /* additional type 1 device config header information (PCI to PCI bridge) */
127 #define PCI_PPBMEMBASE(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) & ~0xfffff)
128 #define PCI_PPBMEMLIMIT(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) | 0xfffff)
129 #define PCI_PPBIOBASE(h,l) ((((h)<<16) + ((l)<<8)) & ~0xfff)
130 #define PCI_PPBIOLIMIT(h,l) ((((h)<<16) + ((l)<<8)) | 0xfff)
133 pci_addr_t pmembase; /* base address of prefetchable memory */
134 pci_addr_t pmemlimit; /* topmost address of prefetchable memory */
135 uint32_t membase; /* base address of memory window */
136 uint32_t memlimit; /* topmost address of memory window */
137 uint32_t iobase; /* base address of port window */
138 uint32_t iolimit; /* topmost address of port window */
139 uint16_t secstat; /* secondary bus status register */
140 uint16_t bridgectl; /* bridge control register */
141 uint8_t seclat; /* CardBus latency timer */
144 /* additional type 2 device config header information (CardBus bridge) */
147 uint32_t membase0; /* base address of memory window */
148 uint32_t memlimit0; /* topmost address of memory window */
149 uint32_t membase1; /* base address of memory window */
150 uint32_t memlimit1; /* topmost address of memory window */
151 uint32_t iobase0; /* base address of port window */
152 uint32_t iolimit0; /* topmost address of port window */
153 uint32_t iobase1; /* base address of port window */
154 uint32_t iolimit1; /* topmost address of port window */
155 uint32_t pccardif; /* PC Card 16bit IF legacy more base addr. */
156 uint16_t secstat; /* secondary bus status register */
157 uint16_t bridgectl; /* bridge control register */
158 uint8_t seclat; /* CardBus latency timer */
161 extern uint32_t pci_numdevs;
163 /* Only if the prerequisites are present */
164 #if defined(_SYS_BUS_H_) && defined(_SYS_PCIIO_H_)
166 STAILQ_ENTRY(pci_devinfo) pci_links;
167 struct resource_list resources;
169 struct pci_conf conf;
178 * Define pci-specific resource flags for accessing memory via dense
179 * or bwx memory spaces. These flags are ignored on i386.
181 #define PCI_RF_DENSE 0x10000
182 #define PCI_RF_BWX 0x20000
184 enum pci_device_ivars {
208 * Simplified accessors for pci devices
210 #define PCI_ACCESSOR(var, ivar, type) \
211 __BUS_ACCESSOR(pci, var, PCI, ivar, type)
213 PCI_ACCESSOR(subvendor, SUBVENDOR, uint16_t)
214 PCI_ACCESSOR(subdevice, SUBDEVICE, uint16_t)
215 PCI_ACCESSOR(vendor, VENDOR, uint16_t)
216 PCI_ACCESSOR(device, DEVICE, uint16_t)
217 PCI_ACCESSOR(devid, DEVID, uint32_t)
218 PCI_ACCESSOR(class, CLASS, uint8_t)
219 PCI_ACCESSOR(subclass, SUBCLASS, uint8_t)
220 PCI_ACCESSOR(progif, PROGIF, uint8_t)
221 PCI_ACCESSOR(revid, REVID, uint8_t)
222 PCI_ACCESSOR(intpin, INTPIN, uint8_t)
223 PCI_ACCESSOR(irq, IRQ, uint8_t)
224 PCI_ACCESSOR(bus, BUS, uint8_t)
225 PCI_ACCESSOR(slot, SLOT, uint8_t)
226 PCI_ACCESSOR(function, FUNCTION, uint8_t)
227 PCI_ACCESSOR(ether, ETHADDR, uint8_t *)
228 PCI_ACCESSOR(cmdreg, CMDREG, uint8_t)
229 PCI_ACCESSOR(cachelnsz, CACHELNSZ, uint8_t)
230 PCI_ACCESSOR(mingnt, MINGNT, uint8_t)
231 PCI_ACCESSOR(maxlat, MAXLAT, uint8_t)
232 PCI_ACCESSOR(lattimer, LATTIMER, uint8_t)
237 * Operations on configuration space.
239 static __inline uint32_t
240 pci_read_config(device_t dev, int reg, int width)
242 return PCI_READ_CONFIG(device_get_parent(dev), dev, reg, width);
246 pci_write_config(device_t dev, int reg, uint32_t val, int width)
248 PCI_WRITE_CONFIG(device_get_parent(dev), dev, reg, val, width);
252 * Ivars for pci bridges.
255 /*typedef enum pci_device_ivars pcib_device_ivars;*/
256 enum pcib_device_ivars {
260 #define PCIB_ACCESSOR(var, ivar, type) \
261 __BUS_ACCESSOR(pcib, var, PCIB, ivar, type)
263 PCIB_ACCESSOR(bus, BUS, uint32_t)
268 * PCI interrupt validation. Invalid interrupt values such as 0 or 128
269 * on i386 or other platforms should be mapped out in the MD pcireadconf
270 * code and not here, since the only MI invalid IRQ is 255.
272 #define PCI_INVALID_IRQ 255
273 #define PCI_INTERRUPT_VALID(x) ((x) != PCI_INVALID_IRQ)
276 * Convenience functions.
278 * These should be used in preference to manually manipulating
279 * configuration space.
282 pci_enable_busmaster(device_t dev)
284 return(PCI_ENABLE_BUSMASTER(device_get_parent(dev), dev));
288 pci_disable_busmaster(device_t dev)
290 return(PCI_DISABLE_BUSMASTER(device_get_parent(dev), dev));
294 pci_enable_io(device_t dev, int space)
296 return(PCI_ENABLE_IO(device_get_parent(dev), dev, space));
300 pci_disable_io(device_t dev, int space)
302 return(PCI_DISABLE_IO(device_get_parent(dev), dev, space));
306 pci_get_vpd_ident(device_t dev, const char **identptr)
308 return(PCI_GET_VPD_IDENT(device_get_parent(dev), dev, identptr));
312 pci_get_vpd_readonly(device_t dev, const char *kw, const char **identptr)
314 return(PCI_GET_VPD_READONLY(device_get_parent(dev), dev, kw, identptr));
318 * Check if the address range falls within the VGA defined address range(s)
321 pci_is_vga_ioport_range(u_long start, u_long end)
324 return (((start >= 0x3b0 && end <= 0x3bb) ||
325 (start >= 0x3c0 && end <= 0x3df)) ? 1 : 0);
329 pci_is_vga_memory_range(u_long start, u_long end)
332 return ((start >= 0xa0000 && end <= 0xbffff) ? 1 : 0);
336 * PCI power states are as defined by ACPI:
338 * D0 State in which device is on and running. It is receiving full
339 * power from the system and delivering full functionality to the user.
340 * D1 Class-specific low-power state in which device context may or may not
341 * be lost. Buses in D1 cannot do anything to the bus that would force
342 * devices on that bus to lose context.
343 * D2 Class-specific low-power state in which device context may or may
344 * not be lost. Attains greater power savings than D1. Buses in D2
345 * can cause devices on that bus to lose some context. Devices in D2
346 * must be prepared for the bus to be in D2 or higher.
347 * D3 State in which the device is off and not running. Device context is
348 * lost. Power can be removed from the device.
350 #define PCI_POWERSTATE_D0 0
351 #define PCI_POWERSTATE_D1 1
352 #define PCI_POWERSTATE_D2 2
353 #define PCI_POWERSTATE_D3 3
354 #define PCI_POWERSTATE_UNKNOWN -1
357 pci_set_powerstate(device_t dev, int state)
359 return PCI_SET_POWERSTATE(device_get_parent(dev), dev, state);
363 pci_get_powerstate(device_t dev)
365 return PCI_GET_POWERSTATE(device_get_parent(dev), dev);
369 pci_find_extcap(device_t dev, int capability, int *capreg)
371 return PCI_FIND_EXTCAP(device_get_parent(dev), dev, capability, capreg);
374 device_t pci_find_bsf(uint8_t, uint8_t, uint8_t);
375 device_t pci_find_device(uint16_t, uint16_t);
376 #endif /* _SYS_BUS_H_ */
379 * cdev switch for control device, initialised in generic PCI code
381 extern struct cdevsw pcicdev;
384 * List of all PCI devices, generation count for the list.
386 STAILQ_HEAD(devlist, pci_devinfo);
388 extern struct devlist pci_devq;
389 extern uint32_t pci_generation;
391 #endif /* _PCIVAR_H_ */