/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
*/
#include <asm/sn/pci/pci_bus_cvlink.h>
#include <asm/sn/simulator.h>
char pciio_info_fingerprint[] = "pciio_info";
/* =====================================================================
* PCI Generic Bus Provider
* Implement PCI provider operations. The pciio* layer provides a
* platform-independent interface for PCI devices. This layer
* switches among the possible implementations of a PCI adapter.
*/
/* =====================================================================
* Provider Function Location
*
* If there is more than one possible provider for
* this platform, we need to examine the master
* vertex of the current vertex for a provider
* function structure, and indirect through the
* appropriately named member.
*/
pciio_provider_t *
pciio_to_provider_fns(vertex_hdl_t dev)
{
pciio_info_t card_info;
pciio_provider_t *provider_fns;
/*
* We're called with two types of vertices, one is
* the bridge vertex (ends with "pci") and the other is the
* pci slot vertex (ends with "pci/[0-8]"). For the first type
* we need to get the provider from the PFUNCS label. For
* the second we get it from fastinfo/c_pops.
*/
provider_fns = pciio_provider_fns_get(dev);
if (provider_fns == NULL) {
card_info = pciio_info_get(dev);
if (card_info != NULL) {
provider_fns = pciio_info_pops_get(card_info);
}
}
if (provider_fns == NULL) {
char devname[MAXDEVNAME];
panic("%s: provider_fns == NULL", vertex_to_name(dev, devname, MAXDEVNAME));
}
return provider_fns;
}
#define DEV_FUNC(dev,func) pciio_to_provider_fns(dev)->func
#define CAST_PIOMAP(x) ((pciio_piomap_t)(x))
#define CAST_DMAMAP(x) ((pciio_dmamap_t)(x))
#define CAST_INTR(x) ((pciio_intr_t)(x))
/*
* Many functions are not passed their vertex
* information directly; rather, they must
* dive through a resource map. These macros
* are available to coordinate this detail.
*/
#define PIOMAP_FUNC(map,func) DEV_FUNC((map)->pp_dev,func)
#define DMAMAP_FUNC(map,func) DEV_FUNC((map)->pd_dev,func)
#define INTR_FUNC(intr_hdl,func) DEV_FUNC((intr_hdl)->pi_dev,func)
/* =====================================================================
* PIO MANAGEMENT
*
* For mapping system virtual address space to
* pciio space on a specified card
*/
pciio_piomap_t
pciio_piomap_alloc(vertex_hdl_t dev, /* set up mapping for this device */
device_desc_t dev_desc, /* device descriptor */
pciio_space_t space, /* CFG, MEM, IO, or a device-decoded window */
iopaddr_t addr, /* lowest address (or offset in window) */
size_t byte_count, /* size of region containing our mappings */
size_t byte_count_max, /* maximum size of a mapping */
unsigned flags)
{ /* defined in sys/pio.h */
return (pciio_piomap_t) DEV_FUNC(dev, piomap_alloc)
(dev, dev_desc, space, addr, byte_count, byte_count_max, flags);
}
void
pciio_piomap_free(pciio_piomap_t pciio_piomap)
{
PIOMAP_FUNC(pciio_piomap, piomap_free)
(CAST_PIOMAP(pciio_piomap));
}
caddr_t
pciio_piomap_addr(pciio_piomap_t pciio_piomap, /* mapping resources */
iopaddr_t pciio_addr, /* map for this pciio address */
size_t byte_count)
{ /* map this many bytes */
pciio_piomap->pp_kvaddr = PIOMAP_FUNC(pciio_piomap, piomap_addr)
(CAST_PIOMAP(pciio_piomap), pciio_addr, byte_count);
return pciio_piomap->pp_kvaddr;
}
void
pciio_piomap_done(pciio_piomap_t pciio_piomap)
{
PIOMAP_FUNC(pciio_piomap, piomap_done)
(CAST_PIOMAP(pciio_piomap));
}
caddr_t
pciio_piotrans_addr(vertex_hdl_t dev, /* translate for this device */
device_desc_t dev_desc, /* device descriptor */
pciio_space_t space, /* CFG, MEM, IO, or a device-decoded window */
iopaddr_t addr, /* starting address (or offset in window) */
size_t byte_count, /* map this many bytes */
unsigned flags)
{ /* (currently unused) */
return DEV_FUNC(dev, piotrans_addr)
(dev, dev_desc, space, addr, byte_count, flags);
}
caddr_t
pciio_pio_addr(vertex_hdl_t dev, /* translate for this device */
device_desc_t dev_desc, /* device descriptor */
pciio_space_t space, /* CFG, MEM, IO, or a device-decoded window */
iopaddr_t addr, /* starting address (or offset in window) */
size_t byte_count, /* map this many bytes */
pciio_piomap_t *mapp, /* where to return the map pointer */
unsigned flags)
{ /* PIO flags */
pciio_piomap_t map = 0;
int errfree = 0;
caddr_t res;
if (mapp) {
map = *mapp; /* possible pre-allocated map */
*mapp = 0; /* record "no map used" */
}
res = pciio_piotrans_addr
(dev, dev_desc, space, addr, byte_count, flags);
if (res)
return res; /* pciio_piotrans worked */
if (!map) {
map = pciio_piomap_alloc
(dev, dev_desc, space, addr, byte_count, byte_count, flags);
if (!map)
return res; /* pciio_piomap_alloc failed */
errfree = 1;
}
res = pciio_piomap_addr
(map, addr, byte_count);
if (!res) {
if (errfree)
pciio_piomap_free(map);
return res; /* pciio_piomap_addr failed */
}
if (mapp)
*mapp = map; /* pass back map used */
return res; /* pciio_piomap_addr succeeded */
}
iopaddr_t
pciio_piospace_alloc(vertex_hdl_t dev, /* Device requiring space */
device_desc_t dev_desc, /* Device descriptor */
pciio_space_t space, /* MEM32/MEM64/IO */
size_t byte_count, /* Size of mapping */
size_t align)
{ /* Alignment needed */
if (align < PAGE_SIZE)
align = PAGE_SIZE;
return DEV_FUNC(dev, piospace_alloc)
(dev, dev_desc, space, byte_count, align);
}
void
pciio_piospace_free(vertex_hdl_t dev, /* Device freeing space */
pciio_space_t space, /* Type of space */
iopaddr_t pciaddr, /* starting address */
size_t byte_count)
{ /* Range of address */
DEV_FUNC(dev, piospace_free)
(dev, space, pciaddr, byte_count);
}
/* =====================================================================
* DMA MANAGEMENT
*
* For mapping from pci space to system
* physical space.
*/
pciio_dmamap_t
pciio_dmamap_alloc(vertex_hdl_t dev, /* set up mappings for this device */
device_desc_t dev_desc, /* device descriptor */
size_t byte_count_max, /* max size of a mapping */
unsigned flags)
{ /* defined in dma.h */
return (pciio_dmamap_t) DEV_FUNC(dev, dmamap_alloc)
(dev, dev_desc, byte_count_max, flags);
}
void
pciio_dmamap_free(pciio_dmamap_t pciio_dmamap)
{
DMAMAP_FUNC(pciio_dmamap, dmamap_free)
(CAST_DMAMAP(pciio_dmamap));
}
iopaddr_t
pciio_dmamap_addr(pciio_dmamap_t pciio_dmamap, /* use these mapping resources */
paddr_t paddr, /* map for this address */
size_t byte_count)
{ /* map this many bytes */
return DMAMAP_FUNC(pciio_dmamap, dmamap_addr)
(CAST_DMAMAP(pciio_dmamap), paddr, byte_count);
}
void
pciio_dmamap_done(pciio_dmamap_t pciio_dmamap)
{
DMAMAP_FUNC(pciio_dmamap, dmamap_done)
(CAST_DMAMAP(pciio_dmamap));
}
iopaddr_t
pciio_dmatrans_addr(vertex_hdl_t dev, /* translate for this device */
device_desc_t dev_desc, /* device descriptor */
paddr_t paddr, /* system physical address */
size_t byte_count, /* length */
unsigned flags)
{ /* defined in dma.h */
return DEV_FUNC(dev, dmatrans_addr)
(dev, dev_desc, paddr, byte_count, flags);
}
iopaddr_t
pciio_dma_addr(vertex_hdl_t dev, /* translate for this device */
device_desc_t dev_desc, /* device descriptor */
paddr_t paddr, /* system physical address */
size_t byte_count, /* length */
pciio_dmamap_t *mapp, /* map to use, then map we used */
unsigned flags)
{ /* PIO flags */
pciio_dmamap_t map = 0;
int errfree = 0;
iopaddr_t res;
if (mapp) {
map = *mapp; /* possible pre-allocated map */
*mapp = 0; /* record "no map used" */
}
res = pciio_dmatrans_addr
(dev, dev_desc, paddr, byte_count, flags);
if (res)
return res; /* pciio_dmatrans worked */
if (!map) {
map = pciio_dmamap_alloc
(dev, dev_desc, byte_count, flags);
if (!map)
return res; /* pciio_dmamap_alloc failed */
errfree = 1;
}
res = pciio_dmamap_addr
(map, paddr, byte_count);
if (!res) {
if (errfree)
pciio_dmamap_free(map);
return res; /* pciio_dmamap_addr failed */
}
if (mapp)
*mapp = map; /* pass back map used */
return res; /* pciio_dmamap_addr succeeded */
}
void
pciio_dmamap_drain(pciio_dmamap_t map)
{
DMAMAP_FUNC(map, dmamap_drain)
(CAST_DMAMAP(map));
}
void
pciio_dmaaddr_drain(vertex_hdl_t dev, paddr_t addr, size_t size)
{
DEV_FUNC(dev, dmaaddr_drain)
(dev, addr, size);
}
/* =====================================================================
* INTERRUPT MANAGEMENT
*
* Allow crosstalk devices to establish interrupts
*/
/*
* Allocate resources required for an interrupt as specified in intr_desc.
* Return resource handle in intr_hdl.
*/
pciio_intr_t
pciio_intr_alloc(vertex_hdl_t dev, /* which Crosstalk device */
device_desc_t dev_desc, /* device descriptor */
pciio_intr_line_t lines, /* INTR line(s) to attach */
vertex_hdl_t owner_dev)
{ /* owner of this interrupt */
return (pciio_intr_t) DEV_FUNC(dev, intr_alloc)
(dev, dev_desc, lines, owner_dev);
}
/*
* Free resources consumed by intr_alloc.
*/
void
pciio_intr_free(pciio_intr_t intr_hdl)
{
INTR_FUNC(intr_hdl, intr_free)
(CAST_INTR(intr_hdl));
}
/*
* Associate resources allocated with a previous pciio_intr_alloc call with the
* described handler, arg, name, etc.
*
* Returns 0 on success, returns <0 on failure.
*/
int
pciio_intr_connect(pciio_intr_t intr_hdl,
intr_func_t intr_func, intr_arg_t intr_arg) /* pciio intr resource handle */
{
return INTR_FUNC(intr_hdl, intr_connect)
(CAST_INTR(intr_hdl), intr_func, intr_arg);
}
/*
* Disassociate handler with the specified interrupt.
*/
void
pciio_intr_disconnect(pciio_intr_t intr_hdl)
{
INTR_FUNC(intr_hdl, intr_disconnect)
(CAST_INTR(intr_hdl));
}
/*
* Return a hwgraph vertex that represents the CPU currently
* targeted by an interrupt.
*/
vertex_hdl_t
pciio_intr_cpu_get(pciio_intr_t intr_hdl)
{
return INTR_FUNC(intr_hdl, intr_cpu_get)
(CAST_INTR(intr_hdl));
}
void
pciio_slot_func_to_name(char *name,
pciio_slot_t slot,
pciio_function_t func)
{
/*
* standard connection points:
*
* PCIIO_SLOT_NONE: .../pci/direct
* PCIIO_FUNC_NONE: .../pci/<SLOT> ie. .../pci/3
* multifunction: .../pci/<SLOT><FUNC> ie. .../pci/3c
*/
if (slot == PCIIO_SLOT_NONE)
sprintf(name, EDGE_LBL_DIRECT);
else if (func == PCIIO_FUNC_NONE)
sprintf(name, "%d", slot);
else
sprintf(name, "%d%c", slot, 'a'+func);
}
/*
* pciio_cardinfo_get
*
* Get the pciio info structure corresponding to the
* specified PCI "slot" (we like it when the same index
* number is used for the PCI IDSEL, the REQ/GNT pair,
* and the interrupt line being used for INTA. We like
* it so much we call it the slot number).
*/
static pciio_info_t
pciio_cardinfo_get(
vertex_hdl_t pciio_vhdl,
pciio_slot_t pci_slot)
{
char namebuf[16];
pciio_info_t info = 0;
vertex_hdl_t conn;
pciio_slot_func_to_name(namebuf, pci_slot, PCIIO_FUNC_NONE);
if (GRAPH_SUCCESS ==
hwgraph_traverse(pciio_vhdl, namebuf, &conn)) {
info = pciio_info_chk(conn);
hwgraph_vertex_unref(conn);
}
return info;
}
/*
* pciio_error_handler:
* dispatch an error to the appropriate
* pciio connection point, or process
* it as a generic pci error.
* Yes, the first parameter is the
* provider vertex at the middle of
* the bus; we get to the pciio connect
* point using the ioerror widgetdev field.
*
* This function is called by the
* specific PCI provider, after it has figured
* out where on the PCI bus (including which slot,
* if it can tell) the error came from.
*/
/*ARGSUSED */
int
pciio_error_handler(
vertex_hdl_t pciio_vhdl,
int error_code,
ioerror_mode_t mode,
ioerror_t *ioerror)
{
pciio_info_t pciio_info;
vertex_hdl_t pconn_vhdl;
pciio_slot_t slot;
int retval;
#if DEBUG && ERROR_DEBUG
printk("%v: pciio_error_handler\n", pciio_vhdl);
#endif
IOERR_PRINTF(printk(KERN_NOTICE "%v: PCI Bus Error: Error code: %d Error mode: %d\n",
pciio_vhdl, error_code, mode));
/* If there is an error handler sitting on
* the "no-slot" connection point, give it
* first crack at the error. NOTE: it is
* quite possible that this function may
* do further refining of the ioerror.
*/
pciio_info = pciio_cardinfo_get(pciio_vhdl, PCIIO_SLOT_NONE);
if (pciio_info && pciio_info->c_efunc) {
pconn_vhdl = pciio_info_dev_get(pciio_info);
retval = pciio_info->c_efunc
(pciio_info->c_einfo, error_code, mode, ioerror);
if (retval != IOERROR_UNHANDLED)
return retval;
}
/* Is the error associated with a particular slot?
*/
if (IOERROR_FIELDVALID(ioerror, widgetdev)) {
short widgetdev;
/*
* NOTE :
* widgetdev is a 4byte value encoded as slot in the higher order
* 2 bytes and function in the lower order 2 bytes.
*/
IOERROR_GETVALUE(widgetdev, ioerror, widgetdev);
slot = pciio_widgetdev_slot_get(widgetdev);
/* If this slot has an error handler,
* deliver the error to it.
*/
pciio_info = pciio_cardinfo_get(pciio_vhdl, slot);
if (pciio_info != NULL) {
if (pciio_info->c_efunc != NULL) {
pconn_vhdl = pciio_info_dev_get(pciio_info);
retval = pciio_info->c_efunc
(pciio_info->c_einfo, error_code, mode, ioerror);
if (retval != IOERROR_UNHANDLED)
return retval;
}
}
}
return (mode == MODE_DEVPROBE)
? IOERROR_HANDLED /* probes are OK */
: IOERROR_UNHANDLED; /* otherwise, foo! */
}
/* =====================================================================
* CONFIGURATION MANAGEMENT
*/
/*
* Startup a crosstalk provider
*/
void
pciio_provider_startup(vertex_hdl_t pciio_provider)
{
DEV_FUNC(pciio_provider, provider_startup)
(pciio_provider);
}
/*
* Shutdown a crosstalk provider
*/
void
pciio_provider_shutdown(vertex_hdl_t pciio_provider)
{
DEV_FUNC(pciio_provider, provider_shutdown)
(pciio_provider);
}
/*
* Read value of configuration register
*/
uint64_t
pciio_config_get(vertex_hdl_t dev,
unsigned reg,
unsigned size)
{
uint64_t value = 0;
unsigned shift = 0;
/* handle accesses that cross words here,
* since that's common code between all
* possible providers.
*/
while (size > 0) {
unsigned biw = 4 - (reg&3);
if (biw > size)
biw = size;
value |= DEV_FUNC(dev, config_get)
(dev, reg, biw) << shift;
shift += 8*biw;
reg += biw;
size -= biw;
}
return value;
}
/*
* Change value of configuration register
*/
void
pciio_config_set(vertex_hdl_t dev,
unsigned reg,
unsigned size,
uint64_t value)
{
/* handle accesses that cross words here,
* since that's common code between all
* possible providers.
*/
while (size > 0) {
unsigned biw = 4 - (reg&3);
if (biw > size)
biw = size;
DEV_FUNC(dev, config_set)
(dev, reg, biw, value);
reg += biw;
size -= biw;
value >>= biw * 8;
}
}
/* =====================================================================
* GENERIC PCI SUPPORT FUNCTIONS
*/
/*
* Issue a hardware reset to a card.
*/
int
pciio_reset(vertex_hdl_t dev)
{
return DEV_FUNC(dev, reset) (dev);
}
/****** Generic pci slot information interfaces ******/
pciio_info_t
pciio_info_chk(vertex_hdl_t pciio)
{
arbitrary_info_t ainfo = 0;
hwgraph_info_get_LBL(pciio, INFO_LBL_PCIIO, &ainfo);
return (pciio_info_t) ainfo;
}
pciio_info_t
pciio_info_get(vertex_hdl_t pciio)
{
pciio_info_t pciio_info;
pciio_info = (pciio_info_t) hwgraph_fastinfo_get(pciio);
if ((pciio_info != NULL) &&
(pciio_info->c_fingerprint != pciio_info_fingerprint)
&& (pciio_info->c_fingerprint != NULL)) {
return((pciio_info_t)-1); /* Should panic .. */
}
return pciio_info;
}
void
pciio_info_set(vertex_hdl_t pciio, pciio_info_t pciio_info)
{
if (pciio_info != NULL)
pciio_info->c_fingerprint = pciio_info_fingerprint;
hwgraph_fastinfo_set(pciio, (arbitrary_info_t) pciio_info);
/* Also, mark this vertex as a PCI slot
* and use the pciio_info, so pciio_info_chk
* can work (and be fairly efficient).
*/
hwgraph_info_add_LBL(pciio, INFO_LBL_PCIIO,
(arbitrary_info_t) pciio_info);
}
vertex_hdl_t
pciio_info_dev_get(pciio_info_t pciio_info)
{
return (pciio_info->c_vertex);
}
/*ARGSUSED*/
pciio_bus_t
pciio_info_bus_get(pciio_info_t pciio_info)
{
return (pciio_info->c_bus);
}
pciio_slot_t
pciio_info_slot_get(pciio_info_t pciio_info)
{
return (pciio_info->c_slot);
}
pciio_function_t
pciio_info_function_get(pciio_info_t pciio_info)
{
return (pciio_info->c_func);
}
pciio_vendor_id_t
pciio_info_vendor_id_get(pciio_info_t pciio_info)
{
return (pciio_info->c_vendor);
}
pciio_device_id_t
pciio_info_device_id_get(pciio_info_t pciio_info)
{
return (pciio_info->c_device);
}
vertex_hdl_t
pciio_info_master_get(pciio_info_t pciio_info)
{
return (pciio_info->c_master);
}
arbitrary_info_t
pciio_info_mfast_get(pciio_info_t pciio_info)
{
return (pciio_info->c_mfast);
}
pciio_provider_t *
pciio_info_pops_get(pciio_info_t pciio_info)
{
return (pciio_info->c_pops);
}
/* =====================================================================
* GENERIC PCI INITIALIZATION FUNCTIONS
*/
/*
* pciioattach: called for each vertex in the graph
* that is a PCI provider.
*/
/*ARGSUSED */
int
pciio_attach(vertex_hdl_t pciio)
{
#if DEBUG && ATTACH_DEBUG
char devname[MAXDEVNAME];
printk("%s: pciio_attach\n", vertex_to_name(pciio, devname, MAXDEVNAME));
#endif
return 0;
}
/*
* Associate a set of pciio_provider functions with a vertex.
*/
void
pciio_provider_register(vertex_hdl_t provider, pciio_provider_t *pciio_fns)
{
hwgraph_info_add_LBL(provider, INFO_LBL_PFUNCS, (arbitrary_info_t) pciio_fns);
}
/*
* Disassociate a set of pciio_provider functions with a vertex.
*/
void
pciio_provider_unregister(vertex_hdl_t provider)
{
arbitrary_info_t ainfo;
hwgraph_info_remove_LBL(provider, INFO_LBL_PFUNCS, (long *) &ainfo);
}
/*
* Obtain a pointer to the pciio_provider functions for a specified Crosstalk
* provider.
*/
pciio_provider_t *
pciio_provider_fns_get(vertex_hdl_t provider)
{
arbitrary_info_t ainfo = 0;
(void) hwgraph_info_get_LBL(provider, INFO_LBL_PFUNCS, &ainfo);
return (pciio_provider_t *) ainfo;
}
pciio_info_t
pciio_device_info_new(
pciio_info_t pciio_info,
vertex_hdl_t master,
pciio_slot_t slot,
pciio_function_t func,
pciio_vendor_id_t vendor_id,
pciio_device_id_t device_id)
{
if (!pciio_info) {
pciio_info = kmalloc(sizeof (*(pciio_info)), GFP_KERNEL);
if ( pciio_info )
memset(pciio_info, 0, sizeof (*(pciio_info)));
else {
printk(KERN_WARNING "pciio_device_info_new(): Unable to "
"allocate memory\n");
return NULL;
}
}
pciio_info->c_slot = slot;
pciio_info->c_func = func;
pciio_info->c_vendor = vendor_id;
pciio_info->c_device = device_id;
pciio_info->c_master = master;
pciio_info->c_mfast = hwgraph_fastinfo_get(master);
pciio_info->c_pops = pciio_provider_fns_get(master);
pciio_info->c_efunc = 0;
pciio_info->c_einfo = 0;
return pciio_info;
}
void
pciio_device_info_free(pciio_info_t pciio_info)
{
/* NOTE : pciio_info is a structure within the pcibr_info
* and not a pointer to memory allocated on the heap !!
*/
memset((char *)pciio_info, 0, sizeof(pciio_info));
}
vertex_hdl_t
pciio_device_info_register(
vertex_hdl_t connectpt, /* vertex at center of bus */
pciio_info_t pciio_info) /* details about the connectpt */
{
char name[32];
vertex_hdl_t pconn;
int device_master_set(vertex_hdl_t, vertex_hdl_t);
pciio_slot_func_to_name(name,
pciio_info->c_slot,
pciio_info->c_func);
if (GRAPH_SUCCESS !=
hwgraph_path_add(connectpt, name, &pconn))
return pconn;
pciio_info->c_vertex = pconn;
pciio_info_set(pconn, pciio_info);
/*
* create link to our pci provider
*/
device_master_set(pconn, pciio_info->c_master);
return pconn;
}
void
pciio_device_info_unregister(vertex_hdl_t connectpt,
pciio_info_t pciio_info)
{
char name[32];
vertex_hdl_t pconn = NULL;
if (!pciio_info)
return;
pciio_slot_func_to_name(name,
pciio_info->c_slot,
pciio_info->c_func);
pciio_info_set(pconn,0);
hwgraph_vertex_unref(pconn);
hwgraph_vertex_destroy(pconn);
}
/*ARGSUSED */
int
pciio_device_attach(vertex_hdl_t pconn,
int drv_flags)
{
pciio_info_t pciio_info;
pciio_vendor_id_t vendor_id;
pciio_device_id_t device_id;
pciio_info = pciio_info_get(pconn);
vendor_id = pciio_info->c_vendor;
device_id = pciio_info->c_device;
/* we don't start attaching things until
* all the driver init routines (including
* pciio_init) have been called; so we
* can assume here that we have a registry.
*/
return(cdl_add_connpt(vendor_id, device_id, pconn, drv_flags));
}
int
pciio_device_detach(vertex_hdl_t pconn,
int drv_flags)
{
return(0);
}
/*
* Allocate space from the specified PCI window mapping resource. On
* success record information about the allocation in the supplied window
* allocation cookie (if non-NULL) and return the address of the allocated
* window. On failure return NULL.
*
* The "size" parameter is usually from a PCI device's Base Address Register
* (BAR) decoder. As such, the allocation must be aligned to be a multiple of
* that. The "align" parameter acts as a ``minimum alignment'' allocation
* constraint. The alignment contraint reflects system or device addressing
* restrictions such as the inability to share higher level ``windows''
* between devices, etc. The returned PCI address allocation will be a
* multiple of the alignment constraint both in alignment and size. Thus, the
* returned PCI address block is aligned to the maximum of the requested size
* and alignment.
*/
iopaddr_t
pciio_device_win_alloc(struct resource *root_resource,
pciio_win_alloc_t win_alloc,
size_t start, size_t size, size_t align)
{
struct resource *new_res;
int status;
new_res = (struct resource *) kmalloc( sizeof(struct resource), GFP_KERNEL);
if (!new_res)
return 0;
if (start > 0) {
status = allocate_resource( root_resource, new_res,
size, start /* Min start addr. */,
(start + size) - 1, 1,
NULL, NULL);
} else {
if (size > align)
align = size;
status = allocate_resource( root_resource, new_res,
size, align /* Min start addr. */,
root_resource->end, align,
NULL, NULL);
}
if (status) {
kfree(new_res);
return((iopaddr_t) NULL);
}
/*
* If a window allocation cookie has been supplied, use it to keep
* track of all the allocated space assigned to this window.
*/
if (win_alloc) {
win_alloc->wa_resource = new_res;
win_alloc->wa_base = new_res->start;
win_alloc->wa_pages = size;
}
return new_res->start;
}
/*
* Free the specified window allocation back into the PCI window mapping
* resource. As noted above, we keep page addresses offset by 1 ...
*/
void
pciio_device_win_free(pciio_win_alloc_t win_alloc)
{
int status;
if (win_alloc->wa_resource) {
status = release_resource(win_alloc->wa_resource);
if (!status)
kfree(win_alloc->wa_resource);
else
BUG();
}
}
/*
* pciio_error_register:
* arrange for a function to be called with
* a specified first parameter plus other
* information when an error is encountered
* and traced to the pci slot corresponding
* to the connection point pconn.
*
* may also be called with a null function
* pointer to "unregister" the error handler.
*
* NOTE: subsequent calls silently overwrite
* previous data for this vertex. We assume that
* cooperating drivers, well, cooperate ...
*/
void
pciio_error_register(vertex_hdl_t pconn,
error_handler_f *efunc,
error_handler_arg_t einfo)
{
pciio_info_t pciio_info;
pciio_info = pciio_info_get(pconn);
ASSERT(pciio_info != NULL);
pciio_info->c_efunc = efunc;
pciio_info->c_einfo = einfo;
}
/*
* Check if any device has been found in this slot, and return
* true or false
* vhdl is the vertex for the slot
*/
int
pciio_slot_inuse(vertex_hdl_t pconn_vhdl)
{
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
ASSERT(pciio_info);
ASSERT(pciio_info->c_vertex == pconn_vhdl);
if (pciio_info->c_vendor) {
/*
* Non-zero value for vendor indicate
* a board being found in this slot.
*/
return 1;
}
return 0;
}
int
pciio_info_type1_get(pciio_info_t pci_info)
{
return (pci_info->c_type1);
}
![[BACK]](/icons/back.gif){kind=icon}
Return to pciio.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [Development] / linux-2.6-xfs / arch / ia64 / sn / io / sn2