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.
26 * $FreeBSD: src/sys/dev/pci/pcivar.h,v 1.80.2.1.4.1 2009/04/15 03:14:26 kensmith Exp $
34 #include <sys/queue.h>
37 #include <bus/pci/pcireg.h>
39 extern const char *pcib_owner; /* arbitrate who owns the pci device arch */
41 /* some PCI bus constants */
43 #define PCI_DOMAINMAX 65535 /* highest supported domain number */
44 #define PCI_BUSMAX 255 /* highest supported bus number */
45 #define PCI_SLOTMAX 31 /* highest supported slot number */
46 #define PCI_FUNCMAX 7 /* highest supported function number */
47 #define PCI_REGMAX 255 /* highest supported config register addr. */
49 #define PCI_MAXMAPS_0 6 /* max. no. of memory/port maps */
50 #define PCI_MAXMAPS_1 2 /* max. no. of maps for PCI to PCI bridge */
51 #define PCI_MAXMAPS_2 1 /* max. no. of maps for CardBus bridge */
53 typedef uint64_t pci_addr_t;
55 /* Interesting values for PCI power management */
57 uint16_t pp_cap; /* PCI power management capabilities */
58 uint8_t pp_status; /* config space address of PCI power status reg */
59 uint8_t pp_pmcsr; /* config space address of PMCSR reg */
60 uint8_t pp_data; /* config space address of PCI power data reg */
76 uint8_t vpd_reg; /* base register, + 2 for addr, + 4 data */
78 char *vpd_ident; /* string identifier */
80 struct vpd_readonly *vpd_ros;
82 struct vpd_write *vpd_w;
85 /* Interesting values for PCI MSI */
87 uint16_t msi_ctrl; /* Message Control */
88 uint8_t msi_location; /* Offset of MSI capability registers. */
89 uint8_t msi_msgnum; /* Number of messages */
90 int msi_alloc; /* Number of allocated messages. */
91 uint64_t msi_addr; /* Contents of address register. */
92 uint16_t msi_data; /* Contents of data register. */
96 /* Interesting values for PCI MSI-X */
98 uint64_t mv_address; /* Contents of address register. */
99 uint32_t mv_data; /* Contents of data register. */
103 struct msix_table_entry {
104 u_int mte_vector; /* 1-based index into msix_vectors array. */
109 uint16_t msix_ctrl; /* Message Control */
110 uint16_t msix_msgnum; /* Number of messages */
111 uint8_t msix_location; /* Offset of MSI-X capability registers. */
112 uint8_t msix_table_bar; /* BAR containing vector table. */
113 uint8_t msix_pba_bar; /* BAR containing PBA. */
114 uint32_t msix_table_offset;
115 uint32_t msix_pba_offset;
116 int msix_alloc; /* Number of allocated vectors. */
117 int msix_table_len; /* Length of virtual table. */
118 struct msix_table_entry *msix_table; /* Virtual table. */
119 struct msix_vector *msix_vectors; /* Array of allocated vectors. */
120 struct resource *msix_table_res; /* Resource containing vector table. */
121 struct resource *msix_pba_res; /* Resource containing PBA. */
124 /* Interesting values for HyperTransport */
126 uint8_t ht_msimap; /* Offset of MSI mapping cap registers. */
127 uint16_t ht_msictrl; /* MSI mapping control */
128 uint64_t ht_msiaddr; /* MSI mapping base address */
131 /* config header information common to all header types */
132 typedef struct pcicfg {
133 struct device *dev; /* device which owns this */
135 uint32_t bar[PCI_MAXMAPS_0]; /* BARs */
136 uint32_t bios; /* BIOS mapping */
138 uint16_t subvendor; /* card vendor ID */
139 uint16_t subdevice; /* card device ID, assigned by card vendor */
140 uint16_t vendor; /* chip vendor ID */
141 uint16_t device; /* chip device ID, assigned by chip vendor */
143 uint16_t cmdreg; /* disable/enable chip and PCI options */
144 uint16_t statreg; /* supported PCI features and error state */
146 uint8_t baseclass; /* chip PCI class */
147 uint8_t subclass; /* chip PCI subclass */
148 uint8_t progif; /* chip PCI programming interface */
149 uint8_t revid; /* chip revision ID */
151 uint8_t hdrtype; /* chip config header type */
152 uint8_t cachelnsz; /* cache line size in 4byte units */
153 uint8_t intpin; /* PCI interrupt pin */
154 uint8_t intline; /* interrupt line (IRQ for PC arch) */
156 uint8_t mingnt; /* min. useful bus grant time in 250ns units */
157 uint8_t maxlat; /* max. tolerated bus grant latency in 250ns */
158 uint8_t lattimer; /* latency timer in units of 30ns bus cycles */
160 uint8_t mfdev; /* multi-function device (from hdrtype reg) */
161 uint8_t nummaps; /* actual number of PCI maps used */
163 uint32_t domain; /* PCI domain */
164 uint8_t bus; /* config space bus address */
165 uint8_t slot; /* config space slot address */
166 uint8_t func; /* config space function number */
168 struct pcicfg_pp pp; /* pci power management */
169 struct pcicfg_vpd vpd; /* pci vital product data */
170 struct pcicfg_msi msi; /* pci msi */
171 struct pcicfg_msix msix; /* pci msi-x */
172 struct pcicfg_ht ht; /* HyperTransport */
175 /* additional type 1 device config header information (PCI to PCI bridge) */
177 #define PCI_PPBMEMBASE(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) & ~0xfffff)
178 #define PCI_PPBMEMLIMIT(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) | 0xfffff)
179 #define PCI_PPBIOBASE(h,l) ((((h)<<16) + ((l)<<8)) & ~0xfff)
180 #define PCI_PPBIOLIMIT(h,l) ((((h)<<16) + ((l)<<8)) | 0xfff)
183 pci_addr_t pmembase; /* base address of prefetchable memory */
184 pci_addr_t pmemlimit; /* topmost address of prefetchable memory */
185 uint32_t membase; /* base address of memory window */
186 uint32_t memlimit; /* topmost address of memory window */
187 uint32_t iobase; /* base address of port window */
188 uint32_t iolimit; /* topmost address of port window */
189 uint16_t secstat; /* secondary bus status register */
190 uint16_t bridgectl; /* bridge control register */
191 uint8_t seclat; /* CardBus latency timer */
194 /* additional type 2 device config header information (CardBus bridge) */
197 uint32_t membase0; /* base address of memory window */
198 uint32_t memlimit0; /* topmost address of memory window */
199 uint32_t membase1; /* base address of memory window */
200 uint32_t memlimit1; /* topmost address of memory window */
201 uint32_t iobase0; /* base address of port window */
202 uint32_t iolimit0; /* topmost address of port window */
203 uint32_t iobase1; /* base address of port window */
204 uint32_t iolimit1; /* topmost address of port window */
205 uint32_t pccardif; /* PC Card 16bit IF legacy more base addr. */
206 uint16_t secstat; /* secondary bus status register */
207 uint16_t bridgectl; /* bridge control register */
208 uint8_t seclat; /* CardBus latency timer */
211 extern uint32_t pci_numdevs;
213 /* Only if the prerequisites are present */
214 #if defined(_SYS_BUS_H_) && defined(_SYS_PCIIO_H_)
216 STAILQ_ENTRY(pci_devinfo) pci_links;
217 struct resource_list resources;
219 struct pci_conf conf;
228 * Define pci-specific resource flags for accessing memory via dense
229 * or bwx memory spaces. These flags are ignored on i386.
231 #define PCI_RF_DENSE 0x10000
232 #define PCI_RF_BWX 0x20000
234 enum pci_device_ivars {
259 * Simplified accessors for pci devices
261 #define PCI_ACCESSOR(var, ivar, type) \
262 __BUS_ACCESSOR(pci, var, PCI, ivar, type)
264 PCI_ACCESSOR(subvendor, SUBVENDOR, uint16_t)
265 PCI_ACCESSOR(subdevice, SUBDEVICE, uint16_t)
266 PCI_ACCESSOR(vendor, VENDOR, uint16_t)
267 PCI_ACCESSOR(device, DEVICE, uint16_t)
268 PCI_ACCESSOR(devid, DEVID, uint32_t)
269 PCI_ACCESSOR(class, CLASS, uint8_t)
270 PCI_ACCESSOR(subclass, SUBCLASS, uint8_t)
271 PCI_ACCESSOR(progif, PROGIF, uint8_t)
272 PCI_ACCESSOR(revid, REVID, uint8_t)
273 PCI_ACCESSOR(intpin, INTPIN, uint8_t)
274 PCI_ACCESSOR(irq, IRQ, uint8_t)
275 PCI_ACCESSOR(domain, DOMAIN, uint32_t)
276 PCI_ACCESSOR(bus, BUS, uint8_t)
277 PCI_ACCESSOR(slot, SLOT, uint8_t)
278 PCI_ACCESSOR(function, FUNCTION, uint8_t)
279 PCI_ACCESSOR(ether, ETHADDR, uint8_t *)
280 PCI_ACCESSOR(cmdreg, CMDREG, uint8_t)
281 PCI_ACCESSOR(cachelnsz, CACHELNSZ, uint8_t)
282 PCI_ACCESSOR(mingnt, MINGNT, uint8_t)
283 PCI_ACCESSOR(maxlat, MAXLAT, uint8_t)
284 PCI_ACCESSOR(lattimer, LATTIMER, uint8_t)
289 * Operations on configuration space.
291 static __inline uint32_t
292 pci_read_config(device_t dev, int reg, int width)
294 return PCI_READ_CONFIG(device_get_parent(dev), dev, reg, width);
298 pci_write_config(device_t dev, int reg, uint32_t val, int width)
300 PCI_WRITE_CONFIG(device_get_parent(dev), dev, reg, val, width);
304 * Ivars for pci bridges.
307 /*typedef enum pci_device_ivars pcib_device_ivars;*/
308 enum pcib_device_ivars {
313 #define PCIB_ACCESSOR(var, ivar, type) \
314 __BUS_ACCESSOR(pcib, var, PCIB, ivar, type)
316 PCIB_ACCESSOR(domain, DOMAIN, uint32_t)
317 PCIB_ACCESSOR(bus, BUS, uint32_t)
322 * PCI interrupt validation. Invalid interrupt values such as 0 or 128
323 * on i386 or other platforms should be mapped out in the MD pcireadconf
324 * code and not here, since the only MI invalid IRQ is 255.
326 #define PCI_INVALID_IRQ 255
327 #define PCI_INTERRUPT_VALID(x) ((x) != PCI_INVALID_IRQ)
330 * Convenience functions.
332 * These should be used in preference to manually manipulating
333 * configuration space.
336 pci_enable_busmaster(device_t dev)
338 return(PCI_ENABLE_BUSMASTER(device_get_parent(dev), dev));
342 pci_disable_busmaster(device_t dev)
344 return(PCI_DISABLE_BUSMASTER(device_get_parent(dev), dev));
348 pci_enable_io(device_t dev, int space)
350 return(PCI_ENABLE_IO(device_get_parent(dev), dev, space));
354 pci_disable_io(device_t dev, int space)
356 return(PCI_DISABLE_IO(device_get_parent(dev), dev, space));
360 pci_get_vpd_ident(device_t dev, const char **identptr)
362 return(PCI_GET_VPD_IDENT(device_get_parent(dev), dev, identptr));
366 pci_get_vpd_readonly(device_t dev, const char *kw, const char **identptr)
368 return(PCI_GET_VPD_READONLY(device_get_parent(dev), dev, kw, identptr));
372 * Check if the address range falls within the VGA defined address range(s)
375 pci_is_vga_ioport_range(u_long start, u_long end)
378 return (((start >= 0x3b0 && end <= 0x3bb) ||
379 (start >= 0x3c0 && end <= 0x3df)) ? 1 : 0);
383 pci_is_vga_memory_range(u_long start, u_long end)
386 return ((start >= 0xa0000 && end <= 0xbffff) ? 1 : 0);
389 void pcie_set_max_readrq(device_t, uint16_t);
391 * PCI power states are as defined by ACPI:
393 * D0 State in which device is on and running. It is receiving full
394 * power from the system and delivering full functionality to the user.
395 * D1 Class-specific low-power state in which device context may or may not
396 * be lost. Buses in D1 cannot do anything to the bus that would force
397 * devices on that bus to lose context.
398 * D2 Class-specific low-power state in which device context may or may
399 * not be lost. Attains greater power savings than D1. Buses in D2
400 * can cause devices on that bus to lose some context. Devices in D2
401 * must be prepared for the bus to be in D2 or higher.
402 * D3 State in which the device is off and not running. Device context is
403 * lost. Power can be removed from the device.
405 #define PCI_POWERSTATE_D0 0
406 #define PCI_POWERSTATE_D1 1
407 #define PCI_POWERSTATE_D2 2
408 #define PCI_POWERSTATE_D3 3
409 #define PCI_POWERSTATE_UNKNOWN -1
412 pci_set_powerstate(device_t dev, int state)
414 return PCI_SET_POWERSTATE(device_get_parent(dev), dev, state);
418 pci_get_powerstate(device_t dev)
420 return PCI_GET_POWERSTATE(device_get_parent(dev), dev);
424 pci_find_extcap(device_t dev, int capability, int *capreg)
426 return PCI_FIND_EXTCAP(device_get_parent(dev), dev, capability, capreg);
430 pci_is_pcie(device_t dev)
433 return (pci_find_extcap(dev, PCIY_EXPRESS, ®) == 0);
437 pci_is_pcix(device_t dev)
440 return (pci_find_extcap(dev, PCIY_PCIX, ®) == 0);
443 #warning "this code is probably incorrect"
445 pci_get_vpdcap_ptr(device_t dev)
448 pci_find_extcap(dev, PCIY_VPD, reg);
453 pci_get_pciecap_ptr(device_t dev)
456 pci_find_extcap(dev, PCIY_EXPRESS, reg);
462 pci_get_pcixcap_ptr(device_t dev)
465 pci_find_extcap(dev, PCIY_PCIX, reg);
471 pci_alloc_msi(device_t dev, int *count)
473 return (PCI_ALLOC_MSI(device_get_parent(dev), dev, count));
477 pci_alloc_msix(device_t dev, int *count)
479 return (PCI_ALLOC_MSIX(device_get_parent(dev), dev, count));
483 pci_remap_msix(device_t dev, int count, const u_int *vectors)
485 return (PCI_REMAP_MSIX(device_get_parent(dev), dev, count, vectors));
489 pci_release_msi(device_t dev)
491 return (PCI_RELEASE_MSI(device_get_parent(dev), dev));
495 pci_msi_count(device_t dev)
497 return (PCI_MSI_COUNT(device_get_parent(dev), dev));
501 pci_msix_count(device_t dev)
503 return (PCI_MSIX_COUNT(device_get_parent(dev), dev));
506 device_t pci_find_bsf(uint8_t, uint8_t, uint8_t);
507 device_t pci_find_dbsf(uint32_t, uint8_t, uint8_t, uint8_t);
508 device_t pci_find_device(uint16_t, uint16_t);
511 * Can be used by MD code to request the PCI bus to re-map an MSI or
514 int pci_remap_msi_irq(device_t dev, u_int irq);
516 /* Can be used by drivers to manage the MSI-X table. */
517 int pci_pending_msix(device_t dev, u_int index);
519 int pci_msi_device_blacklisted(device_t dev);
521 void pci_ht_map_msi(device_t dev, uint64_t addr);
523 #endif /* _SYS_BUS_H_ */
526 * cdev switch for control device, initialised in generic PCI code
528 extern struct cdevsw pcicdev;
531 * List of all PCI devices, generation count for the list.
533 STAILQ_HEAD(devlist, pci_devinfo);
535 extern struct devlist pci_devq;
536 extern uint32_t pci_generation;
538 #endif /* _PCIVAR_H_ */