/*
* 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) 2001-2003 Silicon Graphics, Inc. All rights reserved.
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <asm/sn/sgi.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/iograph.h>
#include <asm/sn/pci/pciio.h>
#include <asm/sn/pci/pcibr.h>
#include <asm/sn/pci/pcibr_private.h>
#include <asm/sn/pci/pci_defs.h>
#include <asm/sn/prio.h>
#include <asm/sn/sn_private.h>
/*
* global variables to toggle the different levels of pcibr debugging.
* -pcibr_debug_mask is the mask of the different types of debugging
* you want to enable. See sys/PCI/pcibr_private.h
* -pcibr_debug_module is the module you want to trace. By default
* all modules are trace. The format is something like "001c10".
* -pcibr_debug_widget is the widget you want to trace. For TIO
* based bricks use the corelet id.
* -pcibr_debug_slot is the pci slot you want to trace.
*/
uint32_t pcibr_debug_mask; /* 0x00000000 to disable */
static char *pcibr_debug_module = "all"; /* 'all' for all modules */
static int pcibr_debug_widget = -1; /* '-1' for all widgets */
static int pcibr_debug_slot = -1; /* '-1' for all slots */
#if PCIBR_SOFT_LIST
pcibr_list_p pcibr_list;
#endif
extern char *pci_space[];
/* =====================================================================
* Function Table of Contents
*
* The order of functions in this file has stopped
* making much sense. We might want to take a look
* at it some time and bring back some sanity, or
* perhaps bust this file into smaller chunks.
*/
extern void do_pcibr_rrb_free_all(pcibr_soft_t, pciio_slot_t);
extern void do_pcibr_rrb_autoalloc(pcibr_soft_t, int, int, int);
extern void pcibr_rrb_alloc_more(pcibr_soft_t pcibr_soft, int slot,
int vchan, int more_rrbs);
extern int pcibr_wrb_flush(vertex_hdl_t);
extern int pcibr_rrb_alloc(vertex_hdl_t, int *, int *);
void pcibr_rrb_alloc_more(pcibr_soft_t, int, int, int);
extern void pcibr_rrb_flush(vertex_hdl_t);
static int pcibr_try_set_device(pcibr_soft_t, pciio_slot_t, unsigned, uint64_t);
void pcibr_release_device(pcibr_soft_t, pciio_slot_t, uint64_t);
extern iopaddr_t pcibr_bus_addr_alloc(pcibr_soft_t, pciio_win_info_t,
pciio_space_t, int, int, int);
extern int hwgraph_vertex_name_get(vertex_hdl_t vhdl, char *buf,
uint buflen);
int pcibr_detach(vertex_hdl_t);
void pcibr_directmap_init(pcibr_soft_t);
int pcibr_pcix_rbars_calc(pcibr_soft_t);
extern int pcibr_ate_alloc(pcibr_soft_t, int, struct resource *);
extern void pcibr_ate_free(pcibr_soft_t, int, int, struct resource *);
extern pciio_dmamap_t get_free_pciio_dmamap(vertex_hdl_t);
extern void free_pciio_dmamap(pcibr_dmamap_t);
extern int pcibr_widget_to_bus(vertex_hdl_t pcibr_vhdl);
extern void ate_write(pcibr_soft_t, int, int, bridge_ate_t);
pcibr_info_t pcibr_info_get(vertex_hdl_t);
static iopaddr_t pcibr_addr_pci_to_xio(vertex_hdl_t, pciio_slot_t, pciio_space_t, iopaddr_t, size_t, unsigned);
pcibr_piomap_t pcibr_piomap_alloc(vertex_hdl_t, device_desc_t, pciio_space_t, iopaddr_t, size_t, size_t, unsigned);
void pcibr_piomap_free(pcibr_piomap_t);
caddr_t pcibr_piomap_addr(pcibr_piomap_t, iopaddr_t, size_t);
void pcibr_piomap_done(pcibr_piomap_t);
caddr_t pcibr_piotrans_addr(vertex_hdl_t, device_desc_t, pciio_space_t, iopaddr_t, size_t, unsigned);
iopaddr_t pcibr_piospace_alloc(vertex_hdl_t, device_desc_t, pciio_space_t, size_t, size_t);
void pcibr_piospace_free(vertex_hdl_t, pciio_space_t, iopaddr_t, size_t);
static iopaddr_t pcibr_flags_to_d64(unsigned, pcibr_soft_t);
extern bridge_ate_t pcibr_flags_to_ate(pcibr_soft_t, unsigned);
pcibr_dmamap_t pcibr_dmamap_alloc(vertex_hdl_t, device_desc_t, size_t, unsigned);
void pcibr_dmamap_free(pcibr_dmamap_t);
extern bridge_ate_p pcibr_ate_addr(pcibr_soft_t, int);
static iopaddr_t pcibr_addr_xio_to_pci(pcibr_soft_t, iopaddr_t, size_t);
iopaddr_t pcibr_dmamap_addr(pcibr_dmamap_t, paddr_t, size_t);
void pcibr_dmamap_done(pcibr_dmamap_t);
cnodeid_t pcibr_get_dmatrans_node(vertex_hdl_t);
iopaddr_t pcibr_dmatrans_addr(vertex_hdl_t, device_desc_t, paddr_t, size_t, unsigned);
void pcibr_dmamap_drain(pcibr_dmamap_t);
void pcibr_dmaaddr_drain(vertex_hdl_t, paddr_t, size_t);
iopaddr_t pcibr_dmamap_pciaddr_get(pcibr_dmamap_t);
void pcibr_provider_startup(vertex_hdl_t);
void pcibr_provider_shutdown(vertex_hdl_t);
int pcibr_reset(vertex_hdl_t);
pciio_endian_t pcibr_endian_set(vertex_hdl_t, pciio_endian_t, pciio_endian_t);
int pcibr_device_flags_set(vertex_hdl_t, pcibr_device_flags_t);
extern int pcibr_slot_info_free(vertex_hdl_t,pciio_slot_t);
extern int pcibr_slot_detach(vertex_hdl_t, pciio_slot_t, int,
char *, int *);
pciio_businfo_t pcibr_businfo_get(vertex_hdl_t);
/* =====================================================================
* Device(x) register management
*/
/* pcibr_try_set_device: attempt to modify Device(x)
* for the specified slot on the specified bridge
* as requested in flags, limited to the specified
* bits. Returns which BRIDGE bits were in conflict,
* or ZERO if everything went OK.
*
* Caller MUST hold pcibr_lock when calling this function.
*/
static int
pcibr_try_set_device(pcibr_soft_t pcibr_soft,
pciio_slot_t slot,
unsigned flags,
uint64_t mask)
{
pcibr_soft_slot_t slotp;
uint64_t old;
uint64_t new;
uint64_t chg;
uint64_t bad;
uint64_t badpmu;
uint64_t badd32;
uint64_t badd64;
uint64_t fix;
unsigned long s;
slotp = &pcibr_soft->bs_slot[slot];
s = pcibr_lock(pcibr_soft);
old = slotp->bss_device;
/* figure out what the desired
* Device(x) bits are based on
* the flags specified.
*/
new = old;
/* Currently, we inherit anything that
* the new caller has not specified in
* one way or another, unless we take
* action here to not inherit.
*
* This is needed for the "swap" stuff,
* since it could have been set via
* pcibr_endian_set -- altho note that
* any explicit PCIBR_BYTE_STREAM or
* PCIBR_WORD_VALUES will freely override
* the effect of that call (and vice
* versa, no protection either way).
*
* I want to get rid of pcibr_endian_set
* in favor of tracking DMA endianness
* using the flags specified when DMA
* channels are created.
*/
#define BRIDGE_DEV_WRGA_BITS (BRIDGE_DEV_PMU_WRGA_EN | BRIDGE_DEV_DIR_WRGA_EN)
#define BRIDGE_DEV_SWAP_BITS (BRIDGE_DEV_SWAP_PMU | BRIDGE_DEV_SWAP_DIR)
/* Do not use Barrier, Write Gather,
* or Prefetch unless asked.
* Leave everything else as it
* was from the last time.
*/
new = new
& ~BRIDGE_DEV_BARRIER
& ~BRIDGE_DEV_WRGA_BITS
& ~BRIDGE_DEV_PREF
;
/* Generic macro flags
*/
if (flags & PCIIO_DMA_DATA) {
new = (new
& ~BRIDGE_DEV_BARRIER) /* barrier off */
| BRIDGE_DEV_PREF; /* prefetch on */
}
if (flags & PCIIO_DMA_CMD) {
new = ((new
& ~BRIDGE_DEV_PREF) /* prefetch off */
& ~BRIDGE_DEV_WRGA_BITS) /* write gather off */
| BRIDGE_DEV_BARRIER; /* barrier on */
}
/* Generic detail flags
*/
if (flags & PCIIO_WRITE_GATHER)
new |= BRIDGE_DEV_WRGA_BITS;
if (flags & PCIIO_NOWRITE_GATHER)
new &= ~BRIDGE_DEV_WRGA_BITS;
if (flags & PCIIO_PREFETCH)
new |= BRIDGE_DEV_PREF;
if (flags & PCIIO_NOPREFETCH)
new &= ~BRIDGE_DEV_PREF;
if (flags & PCIBR_WRITE_GATHER)
new |= BRIDGE_DEV_WRGA_BITS;
if (flags & PCIBR_NOWRITE_GATHER)
new &= ~BRIDGE_DEV_WRGA_BITS;
if (flags & PCIIO_BYTE_STREAM)
new |= BRIDGE_DEV_SWAP_DIR;
if (flags & PCIIO_WORD_VALUES)
new &= ~BRIDGE_DEV_SWAP_DIR;
/* Provider-specific flags
*/
if (flags & PCIBR_PREFETCH)
new |= BRIDGE_DEV_PREF;
if (flags & PCIBR_NOPREFETCH)
new &= ~BRIDGE_DEV_PREF;
if (flags & PCIBR_PRECISE)
new |= BRIDGE_DEV_PRECISE;
if (flags & PCIBR_NOPRECISE)
new &= ~BRIDGE_DEV_PRECISE;
if (flags & PCIBR_BARRIER)
new |= BRIDGE_DEV_BARRIER;
if (flags & PCIBR_NOBARRIER)
new &= ~BRIDGE_DEV_BARRIER;
if (flags & PCIBR_64BIT)
new |= BRIDGE_DEV_DEV_SIZE;
if (flags & PCIBR_NO64BIT)
new &= ~BRIDGE_DEV_DEV_SIZE;
/*
* PIC BRINGUP WAR (PV# 855271):
* Allow setting BRIDGE_DEV_VIRTUAL_EN on PIC iff we're a 64-bit
* device. The bit is only intended for 64-bit devices and, on
* PIC, can cause problems for 32-bit devices.
*/
if (mask == BRIDGE_DEV_D64_BITS &&
PCIBR_WAR_ENABLED(PV855271, pcibr_soft)) {
if (flags & PCIBR_VCHAN1) {
new |= BRIDGE_DEV_VIRTUAL_EN;
mask |= BRIDGE_DEV_VIRTUAL_EN;
}
}
/* PIC BRINGUP WAR (PV# 878674): Don't allow 64bit PIO accesses */
if ((flags & PCIBR_64BIT) &&
PCIBR_WAR_ENABLED(PV878674, pcibr_soft)) {
new &= ~(1ull << 22);
}
chg = old ^ new; /* what are we changing, */
chg &= mask; /* of the interesting bits */
if (chg) {
badd32 = slotp->bss_d32_uctr ? (BRIDGE_DEV_D32_BITS & chg) : 0;
badpmu = slotp->bss_pmu_uctr ? (XBRIDGE_DEV_PMU_BITS & chg) : 0;
badd64 = slotp->bss_d64_uctr ? (XBRIDGE_DEV_D64_BITS & chg) : 0;
bad = badpmu | badd32 | badd64;
if (bad) {
/* some conflicts can be resolved by
* forcing the bit on. this may cause
* some performance degredation in
* the stream(s) that want the bit off,
* but the alternative is not allowing
* the new stream at all.
*/
if ( (fix = bad & (BRIDGE_DEV_PRECISE |
BRIDGE_DEV_BARRIER)) ) {
bad &= ~fix;
/* don't change these bits if
* they are already set in "old"
*/
chg &= ~(fix & old);
}
/* some conflicts can be resolved by
* forcing the bit off. this may cause
* some performance degredation in
* the stream(s) that want the bit on,
* but the alternative is not allowing
* the new stream at all.
*/
if ( (fix = bad & (BRIDGE_DEV_WRGA_BITS |
BRIDGE_DEV_PREF)) ) {
bad &= ~fix;
/* don't change these bits if
* we wanted to turn them on.
*/
chg &= ~(fix & new);
}
/* conflicts in other bits mean
* we can not establish this DMA
* channel while the other(s) are
* still present.
*/
if (bad) {
pcibr_unlock(pcibr_soft, s);
PCIBR_DEBUG((PCIBR_DEBUG_DEVREG, pcibr_soft->bs_vhdl,
"pcibr_try_set_device: mod blocked by 0x%x\n", bad));
return bad;
}
}
}
if (mask == BRIDGE_DEV_PMU_BITS)
slotp->bss_pmu_uctr++;
if (mask == BRIDGE_DEV_D32_BITS)
slotp->bss_d32_uctr++;
if (mask == BRIDGE_DEV_D64_BITS)
slotp->bss_d64_uctr++;
/* the value we want to write is the
* original value, with the bits for
* our selected changes flipped, and
* with any disabled features turned off.
*/
new = old ^ chg; /* only change what we want to change */
if (slotp->bss_device == new) {
pcibr_unlock(pcibr_soft, s);
return 0;
}
pcireg_device_set(pcibr_soft, slot, new);
slotp->bss_device = new;
pcireg_tflush_get(pcibr_soft); /* wait until Bridge PIO complete */
pcibr_unlock(pcibr_soft, s);
PCIBR_DEBUG((PCIBR_DEBUG_DEVREG, pcibr_soft->bs_vhdl,
"pcibr_try_set_device: Device(%d): 0x%x\n", slot, new));
return 0;
}
void
pcibr_release_device(pcibr_soft_t pcibr_soft,
pciio_slot_t slot,
uint64_t mask)
{
pcibr_soft_slot_t slotp;
unsigned long s;
slotp = &pcibr_soft->bs_slot[slot];
s = pcibr_lock(pcibr_soft);
if (mask == BRIDGE_DEV_PMU_BITS)
slotp->bss_pmu_uctr--;
if (mask == BRIDGE_DEV_D32_BITS)
slotp->bss_d32_uctr--;
if (mask == BRIDGE_DEV_D64_BITS)
slotp->bss_d64_uctr--;
pcibr_unlock(pcibr_soft, s);
}
/* =====================================================================
* Bridge (pcibr) "Device Driver" entry points
*/
static int
pcibr_mmap(struct file * file, struct vm_area_struct * vma)
{
vertex_hdl_t pcibr_vhdl = file->f_dentry->d_fsdata;
pcibr_soft_t pcibr_soft;
void *bridge;
unsigned long phys_addr;
int error = 0;
pcibr_soft = pcibr_soft_get(pcibr_vhdl);
bridge = pcibr_soft->bs_base;
phys_addr = (unsigned long)bridge & ~0xc000000000000000; /* Mask out the Uncache bits */
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
vma->vm_flags |= VM_RESERVED | VM_IO;
error = io_remap_page_range(vma, phys_addr, vma->vm_start,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
return error;
}
/*
* This is the file operation table for the pcibr driver.
* As each of the functions are implemented, put the
* appropriate function name below.
*/
static int pcibr_mmap(struct file * file, struct vm_area_struct * vma);
struct file_operations pcibr_fops = {
.owner = THIS_MODULE,
.mmap = pcibr_mmap,
};
/* This is special case code used by grio. There are plans to make
* this a bit more general in the future, but till then this should
* be sufficient.
*/
pciio_slot_t
pcibr_device_slot_get(vertex_hdl_t dev_vhdl)
{
char devname[MAXDEVNAME];
vertex_hdl_t tdev;
pciio_info_t pciio_info;
pciio_slot_t slot = PCIIO_SLOT_NONE;
vertex_to_name(dev_vhdl, devname, MAXDEVNAME);
/* run back along the canonical path
* until we find a PCI connection point.
*/
tdev = hwgraph_connectpt_get(dev_vhdl);
while (tdev != GRAPH_VERTEX_NONE) {
pciio_info = pciio_info_chk(tdev);
if (pciio_info) {
slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
break;
}
hwgraph_vertex_unref(tdev);
tdev = hwgraph_connectpt_get(tdev);
}
hwgraph_vertex_unref(tdev);
return slot;
}
pcibr_info_t
pcibr_info_get(vertex_hdl_t vhdl)
{
return (pcibr_info_t) pciio_info_get(vhdl);
}
pcibr_info_t
pcibr_device_info_new(
pcibr_soft_t pcibr_soft,
pciio_slot_t slot,
pciio_function_t rfunc,
pciio_vendor_id_t vendor,
pciio_device_id_t device)
{
pcibr_info_t pcibr_info;
pciio_function_t func;
int ibit;
func = (rfunc == PCIIO_FUNC_NONE) ? 0 : rfunc;
/*
* Create a pciio_info_s for this device. pciio_device_info_new()
* will set the c_slot (which is suppose to represent the external
* slot (i.e the slot number silk screened on the back of the I/O
* brick)). So for PIC we need to adjust this "internal slot" num
* passed into us, into its external representation. See comment
* for the PCIBR_DEVICE_TO_SLOT macro for more information.
*/
pcibr_info = kmalloc(sizeof (*(pcibr_info)), GFP_KERNEL);
if ( !pcibr_info ) {
return NULL;
}
memset(pcibr_info, 0, sizeof (*(pcibr_info)));
pciio_device_info_new(&pcibr_info->f_c, pcibr_soft->bs_vhdl,
PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot),
rfunc, vendor, device);
pcibr_info->f_dev = slot;
/* Set PCI bus number */
pcibr_info->f_bus = pcibr_widget_to_bus(pcibr_soft->bs_vhdl);
if (slot != PCIIO_SLOT_NONE) {
/*
* Currently favored mapping from PCI
* slot number and INTA/B/C/D to Bridge
* PCI Interrupt Bit Number:
*
* SLOT A B C D
* 0 0 4 0 4
* 1 1 5 1 5
* 2 2 6 2 6
* 3 3 7 3 7
* 4 4 0 4 0
* 5 5 1 5 1
* 6 6 2 6 2
* 7 7 3 7 3
*
* XXX- allow pcibr_hints to override default
* XXX- allow ADMIN to override pcibr_hints
*/
for (ibit = 0; ibit < 4; ++ibit)
pcibr_info->f_ibit[ibit] =
(slot + 4 * ibit) & 7;
/*
* Record the info in the sparse func info space.
*/
if (func < pcibr_soft->bs_slot[slot].bss_ninfo)
pcibr_soft->bs_slot[slot].bss_infos[func] = pcibr_info;
}
return pcibr_info;
}
/*
* pcibr_device_unregister
* This frees up any hardware resources reserved for this PCI device
* and removes any PCI infrastructural information setup for it.
* This is usually used at the time of shutting down of the PCI card.
*/
int
pcibr_device_unregister(vertex_hdl_t pconn_vhdl)
{
pciio_info_t pciio_info;
vertex_hdl_t pcibr_vhdl;
pciio_slot_t slot;
pcibr_soft_t pcibr_soft;
int count_vchan0, count_vchan1;
unsigned long s;
int error_call;
int error = 0;
pciio_info = pciio_info_get(pconn_vhdl);
pcibr_vhdl = pciio_info_master_get(pciio_info);
slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_soft = pcibr_soft_get(pcibr_vhdl);
/* Clear all the hardware xtalk resources for this device */
xtalk_widgetdev_shutdown(pcibr_soft->bs_conn, slot);
/* Flush all the rrbs */
pcibr_rrb_flush(pconn_vhdl);
/*
* If the RRB configuration for this slot has changed, set it
* back to the boot-time default
*/
if (pcibr_soft->bs_rrb_valid_dflt[slot][VCHAN0] >= 0) {
s = pcibr_lock(pcibr_soft);
pcibr_soft->bs_rrb_res[slot] = pcibr_soft->bs_rrb_res[slot] +
pcibr_soft->bs_rrb_valid[slot][VCHAN0] +
pcibr_soft->bs_rrb_valid[slot][VCHAN1] +
pcibr_soft->bs_rrb_valid[slot][VCHAN2] +
pcibr_soft->bs_rrb_valid[slot][VCHAN3];
/* Free the rrbs allocated to this slot, both the normal & virtual */
do_pcibr_rrb_free_all(pcibr_soft, slot);
count_vchan0 = pcibr_soft->bs_rrb_valid_dflt[slot][VCHAN0];
count_vchan1 = pcibr_soft->bs_rrb_valid_dflt[slot][VCHAN1];
pcibr_unlock(pcibr_soft, s);
pcibr_rrb_alloc(pconn_vhdl, &count_vchan0, &count_vchan1);
}
/* Flush the write buffers !! */
error_call = pcibr_wrb_flush(pconn_vhdl);
if (error_call)
error = error_call;
/* Clear the information specific to the slot */
error_call = pcibr_slot_info_free(pcibr_vhdl, slot);
if (error_call)
error = error_call;
return error;
}
/*
* pcibr_driver_reg_callback
* CDL will call this function for each device found in the PCI
* registry that matches the vendor/device IDs supported by
* the driver being registered. The device's connection vertex
* and the driver's attach function return status enable the
* slot's device status to be set.
*/
void
pcibr_driver_reg_callback(vertex_hdl_t pconn_vhdl,
int key1, int key2, int error)
{
pciio_info_t pciio_info;
pcibr_info_t pcibr_info;
vertex_hdl_t pcibr_vhdl;
pciio_slot_t slot;
pcibr_soft_t pcibr_soft;
/* Do not set slot status for vendor/device ID wildcard drivers */
if ((key1 == -1) || (key2 == -1))
return;
pciio_info = pciio_info_get(pconn_vhdl);
pcibr_info = pcibr_info_get(pconn_vhdl);
pcibr_vhdl = pciio_info_master_get(pciio_info);
slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_soft = pcibr_soft_get(pcibr_vhdl);
pcibr_info->f_att_det_error = error;
pcibr_soft->bs_slot[slot].slot_status &= ~SLOT_STATUS_MASK;
if (error) {
pcibr_soft->bs_slot[slot].slot_status |= SLOT_STARTUP_INCMPLT;
} else {
pcibr_soft->bs_slot[slot].slot_status |= SLOT_STARTUP_CMPLT;
}
}
/*
* pcibr_driver_unreg_callback
* CDL will call this function for each device found in the PCI
* registry that matches the vendor/device IDs supported by
* the driver being unregistered. The device's connection vertex
* and the driver's detach function return status enable the
* slot's device status to be set.
*/
void
pcibr_driver_unreg_callback(vertex_hdl_t pconn_vhdl,
int key1, int key2, int error)
{
pciio_info_t pciio_info;
pcibr_info_t pcibr_info;
vertex_hdl_t pcibr_vhdl;
pciio_slot_t slot;
pcibr_soft_t pcibr_soft;
/* Do not set slot status for vendor/device ID wildcard drivers */
if ((key1 == -1) || (key2 == -1))
return;
pciio_info = pciio_info_get(pconn_vhdl);
pcibr_info = pcibr_info_get(pconn_vhdl);
pcibr_vhdl = pciio_info_master_get(pciio_info);
slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_soft = pcibr_soft_get(pcibr_vhdl);
pcibr_info->f_att_det_error = error;
pcibr_soft->bs_slot[slot].slot_status &= ~SLOT_STATUS_MASK;
if (error) {
pcibr_soft->bs_slot[slot].slot_status |= SLOT_SHUTDOWN_INCMPLT;
} else {
pcibr_soft->bs_slot[slot].slot_status |= SLOT_SHUTDOWN_CMPLT;
}
}
/*
* pcibr_detach:
* Detach the bridge device from the hwgraph after cleaning out all the
* underlying vertices.
*/
int
pcibr_detach(vertex_hdl_t xconn)
{
pciio_slot_t slot;
vertex_hdl_t pcibr_vhdl;
pcibr_soft_t pcibr_soft;
unsigned long s;
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DETACH, xconn, "pcibr_detach\n"));
/* Get the bridge vertex from its xtalk connection point */
if (hwgraph_traverse(xconn, EDGE_LBL_PCI, &pcibr_vhdl) != GRAPH_SUCCESS)
return 1;
pcibr_soft = pcibr_soft_get(pcibr_vhdl);
/* Disable the interrupts from the bridge */
s = pcibr_lock(pcibr_soft);
pcireg_intr_enable_set(pcibr_soft, 0);
pcibr_unlock(pcibr_soft, s);
/* Detach all the PCI devices talking to this bridge */
for (slot = pcibr_soft->bs_min_slot;
slot < PCIBR_NUM_SLOTS(pcibr_soft); ++slot) {
pcibr_slot_detach(pcibr_vhdl, slot, 0, (char *)NULL, (int *)NULL);
}
/* Unregister the no-slot connection point */
pciio_device_info_unregister(pcibr_vhdl,
&(pcibr_soft->bs_noslot_info->f_c));
kfree(pcibr_soft->bs_name);
/* Disconnect the error interrupt and free the xtalk resources
* associated with it.
*/
xtalk_intr_disconnect(pcibr_soft->bsi_err_intr);
xtalk_intr_free(pcibr_soft->bsi_err_intr);
/* Clear the software state maintained by the bridge driver for this
* bridge.
*/
kfree(pcibr_soft);
/* Remove the Bridge revision labelled info */
(void)hwgraph_info_remove_LBL(pcibr_vhdl, INFO_LBL_PCIBR_ASIC_REV, NULL);
return 0;
}
/*
* Set the Bridge's 32-bit PCI to XTalk Direct Map register to the most useful
* value we can determine. Note that we must use a single xid for all of:
* -direct-mapped 32-bit DMA accesses
* -direct-mapped 64-bit DMA accesses
* -DMA accesses through the PMU
* -interrupts
* This is the only way to guarantee that completion interrupts will reach a
* CPU after all DMA data has reached memory.
*/
void
pcibr_directmap_init(pcibr_soft_t pcibr_soft)
{
paddr_t paddr;
iopaddr_t xbase;
uint64_t diroff;
cnodeid_t cnodeid = 0; /* We need api for diroff api */
nasid_t nasid;
nasid = COMPACT_TO_NASID_NODEID(cnodeid);
paddr = NODE_OFFSET(nasid) + 0;
/* Assume that if we ask for a DMA mapping to zero the XIO host will
* transmute this into a request for the lowest hunk of memory.
*/
xbase = xtalk_dmatrans_addr(pcibr_soft->bs_conn, 0, paddr, PAGE_SIZE, 0);
diroff = xbase >> BRIDGE_DIRMAP_OFF_ADDRSHFT;
pcireg_dirmap_diroff_set(pcibr_soft, diroff);
pcireg_dirmap_wid_set(pcibr_soft, pcibr_soft->bs_mxid);
pcibr_soft->bs_dir_xport = pcibr_soft->bs_mxid;
if (xbase == (512 << 20)) { /* 512Meg */
pcireg_dirmap_add512_set(pcibr_soft);
pcibr_soft->bs_dir_xbase = (512 << 20);
} else {
pcireg_dirmap_add512_clr(pcibr_soft);
pcibr_soft->bs_dir_xbase = diroff << BRIDGE_DIRMAP_OFF_ADDRSHFT;
}
}
int
pcibr_asic_rev(vertex_hdl_t pconn_vhdl)
{
vertex_hdl_t pcibr_vhdl;
int rc;
arbitrary_info_t ainfo;
if (GRAPH_SUCCESS !=
hwgraph_traverse(pconn_vhdl, EDGE_LBL_MASTER, &pcibr_vhdl))
return -1;
rc = hwgraph_info_get_LBL(pcibr_vhdl, INFO_LBL_PCIBR_ASIC_REV, &ainfo);
/*
* Any hwgraph function that returns a vertex handle will implicity
* increment that vertex's reference count. The caller must explicity
* decrement the vertex's referece count after the last reference to
* that vertex.
*
* Decrement reference count incremented by call to hwgraph_traverse().
*
*/
hwgraph_vertex_unref(pcibr_vhdl);
if (rc != GRAPH_SUCCESS)
return -1;
return (int) ainfo;
}
/* =====================================================================
* PIO MANAGEMENT
*/
static iopaddr_t
pcibr_addr_pci_to_xio(vertex_hdl_t pconn_vhdl,
pciio_slot_t slot,
pciio_space_t space,
iopaddr_t pci_addr,
size_t req_size,
unsigned flags)
{
pcibr_info_t pcibr_info = pcibr_info_get(pconn_vhdl);
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
unsigned bar; /* which BASE reg on device is decoding */
iopaddr_t xio_addr = XIO_NOWHERE;
iopaddr_t base = 0;
iopaddr_t limit = 0;
pciio_space_t wspace; /* which space device is decoding */
iopaddr_t wbase; /* base of device decode on PCI */
size_t wsize; /* size of device decode on PCI */
int try; /* DevIO(x) window scanning order control */
int maxtry, halftry;
int win; /* which DevIO(x) window is being used */
pciio_space_t mspace; /* target space for devio(x) register */
iopaddr_t mbase; /* base of devio(x) mapped area on PCI */
size_t msize; /* size of devio(x) mapped area on PCI */
size_t mmask; /* addr bits stored in Device(x) */
unsigned long s;
s = pcibr_lock(pcibr_soft);
if (pcibr_soft->bs_slot[slot].has_host) {
slot = pcibr_soft->bs_slot[slot].host_slot;
pcibr_info = pcibr_soft->bs_slot[slot].bss_infos[0];
/*
* Special case for dual-slot pci devices such as ioc3 on IP27
* baseio. In these cases, pconn_vhdl should never be for a pci
* function on a subordiate PCI bus, so we can safely reset pciio_info
* to be the info struct embedded in pcibr_info. Failure to do this
* results in using a bogus pciio_info_t for calculations done later
* in this routine.
*/
pciio_info = &pcibr_info->f_c;
}
if (space == PCIIO_SPACE_NONE)
goto done;
if (space == PCIIO_SPACE_CFG) {
/*
* Usually, the first mapping
* established to a PCI device
* is to its config space.
*
* In any case, we definitely
* do NOT need to worry about
* PCI BASE registers, and
* MUST NOT attempt to point
* the DevIO(x) window at
* this access ...
*/
if (((flags & PCIIO_BYTE_STREAM) == 0) &&
((pci_addr + req_size) <= BRIDGE_TYPE0_CFG_FUNC_OFF))
xio_addr = pci_addr + PCIBR_TYPE0_CFG_DEV(pcibr_soft, slot);
goto done;
}
if (space == PCIIO_SPACE_ROM) {
/* PIO to the Expansion Rom.
* Driver is responsible for
* enabling and disabling
* decodes properly.
*/
wbase = pciio_info->c_rbase;
wsize = pciio_info->c_rsize;
/*
* While the driver should know better
* than to attempt to map more space
* than the device is decoding, he might
* do it; better to bail out here.
*/
if ((pci_addr + req_size) > wsize)
goto done;
pci_addr += wbase;
space = PCIIO_SPACE_MEM;
}
/*
* reduce window mappings to raw
* space mappings (maybe allocating
* windows), and try for DevIO(x)
* usage (setting it if it is available).
*/
bar = space - PCIIO_SPACE_WIN0;
if (bar < 6) {
wspace = pciio_info->c_window[bar].w_space;
if (wspace == PCIIO_SPACE_NONE)
goto done;
/* get PCI base and size */
wbase = pciio_info->c_window[bar].w_base;
wsize = pciio_info->c_window[bar].w_size;
/*
* While the driver should know better
* than to attempt to map more space
* than the device is decoding, he might
* do it; better to bail out here.
*/
if ((pci_addr + req_size) > wsize)
goto done;
/* shift from window relative to
* decoded space relative.
*/
pci_addr += wbase;
space = wspace;
} else
bar = -1;
/* Scan all the DevIO(x) windows twice looking for one
* that can satisfy our request. The first time through,
* only look at assigned windows; the second time, also
* look at PCIIO_SPACE_NONE windows. Arrange the order
* so we always look at our own window first.
*
* We will not attempt to satisfy a single request
* by concatinating multiple windows.
*/
maxtry = PCIBR_NUM_SLOTS(pcibr_soft) * 2;
halftry = PCIBR_NUM_SLOTS(pcibr_soft) - 1;
for (try = 0; try < maxtry; ++try) {
uint64_t devreg;
unsigned offset;
/* calculate win based on slot, attempt, and max possible
devices on bus */
win = (try + slot) % PCIBR_NUM_SLOTS(pcibr_soft);
/* If this DevIO(x) mapping area can provide
* a mapping to this address, use it.
*/
msize = (win < 2) ? 0x200000 : 0x100000;
mmask = -msize;
if (space != PCIIO_SPACE_IO)
mmask &= 0x3FFFFFFF;
offset = pci_addr & (msize - 1);
/* If this window can't possibly handle that request,
* go on to the next window.
*/
if (((pci_addr & (msize - 1)) + req_size) > msize)
continue;
devreg = pcibr_soft->bs_slot[win].bss_device;
/* Is this window "nailed down"?
* If not, maybe we can use it.
* (only check this the second time through)
*/
mspace = pcibr_soft->bs_slot[win].bss_devio.bssd_space;
if ((try > halftry) && (mspace == PCIIO_SPACE_NONE)) {
/* If this is the primary DevIO(x) window
* for some other device, skip it.
*/
if ((win != slot) &&
(PCIIO_VENDOR_ID_NONE !=
pcibr_soft->bs_slot[win].bss_vendor_id))
continue;
/* It's a free window, and we fit in it.
* Set up Device(win) to our taste.
*/
mbase = pci_addr & mmask;
/* check that we would really get from
* here to there.
*/
if ((mbase | offset) != pci_addr)
continue;
devreg &= ~BRIDGE_DEV_OFF_MASK;
if (space != PCIIO_SPACE_IO)
devreg |= BRIDGE_DEV_DEV_IO_MEM;
else
devreg &= ~BRIDGE_DEV_DEV_IO_MEM;
devreg |= (mbase >> 20) & BRIDGE_DEV_OFF_MASK;
/* default is WORD_VALUES.
* if you specify both,
* operation is undefined.
*/
if (flags & PCIIO_BYTE_STREAM)
devreg |= BRIDGE_DEV_DEV_SWAP;
else
devreg &= ~BRIDGE_DEV_DEV_SWAP;
if (pcibr_soft->bs_slot[win].bss_device != devreg) {
pcireg_device_set(pcibr_soft, win, devreg);
pcibr_soft->bs_slot[win].bss_device = devreg;
pcireg_tflush_get(pcibr_soft);
PCIBR_DEBUG((PCIBR_DEBUG_DEVREG, pconn_vhdl,
"pcibr_addr_pci_to_xio: Device(%d): 0x%x\n",
win, devreg));
}
pcibr_soft->bs_slot[win].bss_devio.bssd_space = space;
pcibr_soft->bs_slot[win].bss_devio.bssd_base = mbase;
xio_addr = PCIBR_BRIDGE_DEVIO(pcibr_soft, win) + (pci_addr - mbase);
/* Increment this DevIO's use count */
pcibr_soft->bs_slot[win].bss_devio.bssd_ref_cnt++;
/* Save the DevIO register index used to access this BAR */
if (bar != -1)
pcibr_info->f_window[bar].w_devio_index = win;
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_addr_pci_to_xio: map to space %s [0x%lx..0x%lx] "
"for slot %d allocates DevIO(%d) Device(%d) set to %lx\n",
pci_space[space], pci_addr, pci_addr + req_size - 1,
slot, win, win, devreg));
goto done;
} /* endif DevIO(x) not pointed */
mbase = pcibr_soft->bs_slot[win].bss_devio.bssd_base;
/* Now check for request incompat with DevIO(x)
*/
if ((mspace != space) ||
(pci_addr < mbase) ||
((pci_addr + req_size) > (mbase + msize)) ||
((flags & PCIIO_BYTE_STREAM) && !(devreg & BRIDGE_DEV_DEV_SWAP)) ||
(!(flags & PCIIO_BYTE_STREAM) && (devreg & BRIDGE_DEV_DEV_SWAP)))
continue;
/* DevIO(x) window is pointed at PCI space
* that includes our target. Calculate the
* final XIO address, release the lock and
* return.
*/
xio_addr = PCIBR_BRIDGE_DEVIO(pcibr_soft, win) + (pci_addr - mbase);
/* Increment this DevIO's use count */
pcibr_soft->bs_slot[win].bss_devio.bssd_ref_cnt++;
/* Save the DevIO register index used to access this BAR */
if (bar != -1)
pcibr_info->f_window[bar].w_devio_index = win;
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_addr_pci_to_xio: map to space %s [0x%lx..0x%lx] "
"for slot %d uses DevIO(%d)\n", pci_space[space],
pci_addr, pci_addr + req_size - 1, slot, win));
goto done;
}
switch (space) {
/*
* Accesses to device decode
* areas that do a not fit
* within the DevIO(x) space are
* modified to be accesses via
* the direct mapping areas.
*
* If necessary, drivers can
* explicitly ask for mappings
* into these address spaces,
* but this should never be needed.
*/
case PCIIO_SPACE_MEM: /* "mem space" */
case PCIIO_SPACE_MEM32: /* "mem, use 32-bit-wide bus" */
if (IS_PIC_BUSNUM_SOFT(pcibr_soft, 0)) { /* PIC bus 0 */
base = PICBRIDGE0_PCI_MEM32_BASE;
limit = PICBRIDGE0_PCI_MEM32_LIMIT;
} else if (IS_PIC_BUSNUM_SOFT(pcibr_soft, 1)) { /* PIC bus 1 */
base = PICBRIDGE1_PCI_MEM32_BASE;
limit = PICBRIDGE1_PCI_MEM32_LIMIT;
} else {
printk("pcibr_addr_pci_to_xio(): unknown bridge type");
return (iopaddr_t)0;
}
if ((pci_addr + base + req_size - 1) <= limit)
xio_addr = pci_addr + base;
break;
case PCIIO_SPACE_MEM64: /* "mem, use 64-bit-wide bus" */
if (IS_PIC_BUSNUM_SOFT(pcibr_soft, 0)) { /* PIC bus 0 */
base = PICBRIDGE0_PCI_MEM64_BASE;
limit = PICBRIDGE0_PCI_MEM64_LIMIT;
} else if (IS_PIC_BUSNUM_SOFT(pcibr_soft, 1)) { /* PIC bus 1 */
base = PICBRIDGE1_PCI_MEM64_BASE;
limit = PICBRIDGE1_PCI_MEM64_LIMIT;
} else {
printk("pcibr_addr_pci_to_xio(): unknown bridge type");
return (iopaddr_t)0;
}
if ((pci_addr + base + req_size - 1) <= limit)
xio_addr = pci_addr + base;
break;
case PCIIO_SPACE_IO: /* "i/o space" */
/*
* PIC bridges do not support big-window aliases into PCI I/O space
*/
xio_addr = XIO_NOWHERE;
break;
}
/* Check that "Direct PIO" byteswapping matches,
* try to change it if it does not.
*/
if (xio_addr != XIO_NOWHERE) {
unsigned bst; /* nonzero to set bytestream */
unsigned *bfp; /* addr of record of how swapper is set */
uint64_t swb; /* which control bit to mung */
unsigned bfo; /* current swapper setting */
unsigned bfn; /* desired swapper setting */
bfp = ((space == PCIIO_SPACE_IO)
? (&pcibr_soft->bs_pio_end_io)
: (&pcibr_soft->bs_pio_end_mem));
bfo = *bfp;
bst = flags & PCIIO_BYTE_STREAM;
bfn = bst ? PCIIO_BYTE_STREAM : PCIIO_WORD_VALUES;
if (bfn == bfo) { /* we already match. */
;
} else if (bfo != 0) { /* we have a conflict. */
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_addr_pci_to_xio: swap conflict in %s, "
"was%s%s, want%s%s\n", pci_space[space],
bfo & PCIIO_BYTE_STREAM ? " BYTE_STREAM" : "",
bfo & PCIIO_WORD_VALUES ? " WORD_VALUES" : "",
bfn & PCIIO_BYTE_STREAM ? " BYTE_STREAM" : "",
bfn & PCIIO_WORD_VALUES ? " WORD_VALUES" : ""));
xio_addr = XIO_NOWHERE;
} else { /* OK to make the change. */
swb = (space == PCIIO_SPACE_IO) ? 0: BRIDGE_CTRL_MEM_SWAP;
if (bst) {
pcireg_control_bit_set(pcibr_soft, swb);
} else {
pcireg_control_bit_clr(pcibr_soft, swb);
}
*bfp = bfn; /* record the assignment */
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_addr_pci_to_xio: swap for %s set to%s%s\n",
pci_space[space],
bfn & PCIIO_BYTE_STREAM ? " BYTE_STREAM" : "",
bfn & PCIIO_WORD_VALUES ? " WORD_VALUES" : ""));
}
}
done:
pcibr_unlock(pcibr_soft, s);
return xio_addr;
}
/*ARGSUSED6 */
pcibr_piomap_t
pcibr_piomap_alloc(vertex_hdl_t pconn_vhdl,
device_desc_t dev_desc,
pciio_space_t space,
iopaddr_t pci_addr,
size_t req_size,
size_t req_size_max,
unsigned flags)
{
pcibr_info_t pcibr_info = pcibr_info_get(pconn_vhdl);
pciio_info_t pciio_info = &pcibr_info->f_c;
pciio_slot_t pciio_slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
vertex_hdl_t xconn_vhdl = pcibr_soft->bs_conn;
pcibr_piomap_t *mapptr;
pcibr_piomap_t maplist;
pcibr_piomap_t pcibr_piomap;
iopaddr_t xio_addr;
xtalk_piomap_t xtalk_piomap;
unsigned long s;
/* Make sure that the req sizes are non-zero */
if ((req_size < 1) || (req_size_max < 1)) {
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piomap_alloc: req_size | req_size_max < 1\n"));
return NULL;
}
/*
* Code to translate slot/space/addr
* into xio_addr is common between
* this routine and pcibr_piotrans_addr.
*/
xio_addr = pcibr_addr_pci_to_xio(pconn_vhdl, pciio_slot, space, pci_addr, req_size, flags);
if (xio_addr == XIO_NOWHERE) {
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piomap_alloc: xio_addr == XIO_NOWHERE\n"));
return NULL;
}
/* Check the piomap list to see if there is already an allocated
* piomap entry but not in use. If so use that one. Otherwise
* allocate a new piomap entry and add it to the piomap list
*/
mapptr = &(pcibr_info->f_piomap);
s = pcibr_lock(pcibr_soft);
for (pcibr_piomap = *mapptr;
pcibr_piomap != NULL;
pcibr_piomap = pcibr_piomap->bp_next) {
if (pcibr_piomap->bp_mapsz == 0)
break;
}
if (pcibr_piomap)
mapptr = NULL;
else {
pcibr_unlock(pcibr_soft, s);
pcibr_piomap = kmalloc(sizeof (*(pcibr_piomap)), GFP_KERNEL);
if ( !pcibr_piomap ) {
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piomap_alloc: malloc fails\n"));
return NULL;
}
memset(pcibr_piomap, 0, sizeof (*(pcibr_piomap)));
}
pcibr_piomap->bp_dev = pconn_vhdl;
pcibr_piomap->bp_slot = PCIBR_DEVICE_TO_SLOT(pcibr_soft, pciio_slot);
pcibr_piomap->bp_flags = flags;
pcibr_piomap->bp_space = space;
pcibr_piomap->bp_pciaddr = pci_addr;
pcibr_piomap->bp_mapsz = req_size;
pcibr_piomap->bp_soft = pcibr_soft;
pcibr_piomap->bp_toc = ATOMIC_INIT(0);
if (mapptr) {
s = pcibr_lock(pcibr_soft);
maplist = *mapptr;
pcibr_piomap->bp_next = maplist;
*mapptr = pcibr_piomap;
}
pcibr_unlock(pcibr_soft, s);
if (pcibr_piomap) {
xtalk_piomap =
xtalk_piomap_alloc(xconn_vhdl, 0,
xio_addr,
req_size, req_size_max,
flags & PIOMAP_FLAGS);
if (xtalk_piomap) {
pcibr_piomap->bp_xtalk_addr = xio_addr;
pcibr_piomap->bp_xtalk_pio = xtalk_piomap;
} else {
pcibr_piomap->bp_mapsz = 0;
pcibr_piomap = 0;
}
}
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piomap_alloc: map=0x%lx\n", pcibr_piomap));
return pcibr_piomap;
}
/*ARGSUSED */
void
pcibr_piomap_free(pcibr_piomap_t pcibr_piomap)
{
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pcibr_piomap->bp_dev,
"pcibr_piomap_free: map=0x%lx\n", pcibr_piomap));
xtalk_piomap_free(pcibr_piomap->bp_xtalk_pio);
pcibr_piomap->bp_xtalk_pio = 0;
pcibr_piomap->bp_mapsz = 0;
}
/*ARGSUSED */
caddr_t
pcibr_piomap_addr(pcibr_piomap_t pcibr_piomap,
iopaddr_t pci_addr,
size_t req_size)
{
caddr_t addr;
addr = xtalk_piomap_addr(pcibr_piomap->bp_xtalk_pio,
pcibr_piomap->bp_xtalk_addr +
pci_addr - pcibr_piomap->bp_pciaddr,
req_size);
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pcibr_piomap->bp_dev,
"pcibr_piomap_addr: map=0x%lx, addr=0x%lx\n",
pcibr_piomap, addr));
return addr;
}
/*ARGSUSED */
void
pcibr_piomap_done(pcibr_piomap_t pcibr_piomap)
{
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pcibr_piomap->bp_dev,
"pcibr_piomap_done: map=0x%lx\n", pcibr_piomap));
xtalk_piomap_done(pcibr_piomap->bp_xtalk_pio);
}
/*ARGSUSED */
caddr_t
pcibr_piotrans_addr(vertex_hdl_t pconn_vhdl,
device_desc_t dev_desc,
pciio_space_t space,
iopaddr_t pci_addr,
size_t req_size,
unsigned flags)
{
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
pciio_slot_t pciio_slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
vertex_hdl_t xconn_vhdl = pcibr_soft->bs_conn;
iopaddr_t xio_addr;
caddr_t addr;
xio_addr = pcibr_addr_pci_to_xio(pconn_vhdl, pciio_slot, space, pci_addr, req_size, flags);
if (xio_addr == XIO_NOWHERE) {
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_PIODIR, pconn_vhdl,
"pcibr_piotrans_addr: xio_addr == XIO_NOWHERE\n"));
return NULL;
}
addr = xtalk_piotrans_addr(xconn_vhdl, 0, xio_addr, req_size, flags & PIOMAP_FLAGS);
PCIBR_DEBUG((PCIBR_DEBUG_PIODIR, pconn_vhdl,
"pcibr_piotrans_addr: xio_addr=0x%lx, addr=0x%lx\n",
xio_addr, addr));
return addr;
}
/*
* PIO Space allocation and management.
* Allocate and Manage the PCI PIO space (mem and io space)
* This routine is pretty simplistic at this time, and
* does pretty trivial management of allocation and freeing.
* The current scheme is prone for fragmentation.
* Change the scheme to use bitmaps.
*/
/*ARGSUSED */
iopaddr_t
pcibr_piospace_alloc(vertex_hdl_t pconn_vhdl,
device_desc_t dev_desc,
pciio_space_t space,
size_t req_size,
size_t alignment)
{
pcibr_info_t pcibr_info = pcibr_info_get(pconn_vhdl);
pciio_info_t pciio_info = &pcibr_info->f_c;
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
pciio_piospace_t piosp;
unsigned long s;
iopaddr_t start_addr;
size_t align_mask;
/*
* Check for proper alignment
*/
ASSERT(alignment >= PAGE_SIZE);
ASSERT((alignment & (alignment - 1)) == 0);
align_mask = alignment - 1;
s = pcibr_lock(pcibr_soft);
/*
* First look if a previously allocated chunk exists.
*/
piosp = pcibr_info->f_piospace;
if (piosp) {
/*
* Look through the list for a right sized free chunk.
*/
do {
if (piosp->free &&
(piosp->space == space) &&
(piosp->count >= req_size) &&
!(piosp->start & align_mask)) {
piosp->free = 0;
pcibr_unlock(pcibr_soft, s);
return piosp->start;
}
piosp = piosp->next;
} while (piosp);
}
ASSERT(!piosp);
/*
* Allocate PCI bus address, usually for the Universe chip driver;
* do not pass window info since the actual PCI bus address
* space will never be freed. The space may be reused after it
* is logically released by pcibr_piospace_free().
*/
switch (space) {
case PCIIO_SPACE_IO:
start_addr = pcibr_bus_addr_alloc(pcibr_soft, NULL,
PCIIO_SPACE_IO,
0, req_size, alignment);
break;
case PCIIO_SPACE_MEM:
case PCIIO_SPACE_MEM32:
start_addr = pcibr_bus_addr_alloc(pcibr_soft, NULL,
PCIIO_SPACE_MEM32,
0, req_size, alignment);
break;
default:
ASSERT(0);
pcibr_unlock(pcibr_soft, s);
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piospace_alloc: unknown space %d\n", space));
return 0;
}
/*
* If too big a request, reject it.
*/
if (!start_addr) {
pcibr_unlock(pcibr_soft, s);
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piospace_alloc: request 0x%lx to big\n", req_size));
return 0;
}
piosp = kmalloc(sizeof (*(piosp)), GFP_KERNEL);
if ( !piosp ) {
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piospace_alloc: malloc fails\n"));
return 0;
}
memset(piosp, 0, sizeof (*(piosp)));
piosp->free = 0;
piosp->space = space;
piosp->start = start_addr;
piosp->count = req_size;
piosp->next = pcibr_info->f_piospace;
pcibr_info->f_piospace = piosp;
pcibr_unlock(pcibr_soft, s);
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piospace_alloc: piosp=0x%lx\n", piosp));
return start_addr;
}
#define ERR_MSG "!Device %s freeing size (0x%lx) different than allocated (0x%lx)"
/*ARGSUSED */
void
pcibr_piospace_free(vertex_hdl_t pconn_vhdl,
pciio_space_t space,
iopaddr_t pciaddr,
size_t req_size)
{
pcibr_info_t pcibr_info = pcibr_info_get(pconn_vhdl);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pcibr_info->f_mfast;
pciio_piospace_t piosp;
unsigned long s;
char name[1024];
/*
* Look through the bridge data structures for the pciio_piospace_t
* structure corresponding to 'pciaddr'
*/
s = pcibr_lock(pcibr_soft);
piosp = pcibr_info->f_piospace;
while (piosp) {
/*
* Piospace free can only be for the complete
* chunk and not parts of it..
*/
if (piosp->start == pciaddr) {
if (piosp->count == req_size)
break;
/*
* Improper size passed for freeing..
* Print a message and break;
*/
hwgraph_vertex_name_get(pconn_vhdl, name, 1024);
printk(KERN_WARNING "pcibr_piospace_free: error");
printk(KERN_WARNING "Device %s freeing size (0x%lx) different than allocated (0x%lx)",
name, req_size, piosp->count);
printk(KERN_WARNING "Freeing 0x%lx instead", piosp->count);
break;
}
piosp = piosp->next;
}
if (!piosp) {
printk(KERN_WARNING
"pcibr_piospace_free: Address 0x%lx size 0x%lx - No match\n",
pciaddr, req_size);
pcibr_unlock(pcibr_soft, s);
return;
}
piosp->free = 1;
pcibr_unlock(pcibr_soft, s);
PCIBR_DEBUG((PCIBR_DEBUG_PIOMAP, pconn_vhdl,
"pcibr_piospace_free: piosp=0x%lx\n", piosp));
return;
}
/* =====================================================================
* DMA MANAGEMENT
*
* The Bridge ASIC provides three methods of doing
* DMA: via a "direct map" register available in
* 32-bit PCI space (which selects a contiguous 2G
* address space on some other widget), via
* "direct" addressing via 64-bit PCI space (all
* destination information comes from the PCI
* address, including transfer attributes), and via
* a "mapped" region that allows a bunch of
* different small mappings to be established with
* the PMU.
*
* For efficiency, we most prefer to use the 32-bit
* direct mapping facility, since it requires no
* resource allocations. The advantage of using the
* PMU over the 64-bit direct is that single-cycle
* PCI addressing can be used; the advantage of
* using 64-bit direct over PMU addressing is that
* we do not have to allocate entries in the PMU.
*/
/*
* Convert PCI-generic software flags and Bridge-specific software flags
* into Bridge-specific Direct Map attribute bits.
*/
static iopaddr_t
pcibr_flags_to_d64(unsigned flags, pcibr_soft_t pcibr_soft)
{
iopaddr_t attributes = 0;
/* Sanity check: Bridge only allows use of VCHAN1 via 64-bit addrs */
#ifdef LATER
ASSERT_ALWAYS(!(flags & PCIBR_VCHAN1) || (flags & PCIIO_DMA_A64));
#endif
/* Generic macro flags
*/
if (flags & PCIIO_DMA_DATA) { /* standard data channel */
attributes &= ~PCI64_ATTR_BAR; /* no barrier bit */
attributes |= PCI64_ATTR_PREF; /* prefetch on */
}
if (flags & PCIIO_DMA_CMD) { /* standard command channel */
attributes |= PCI64_ATTR_BAR; /* barrier bit on */
attributes &= ~PCI64_ATTR_PREF; /* disable prefetch */
}
/* Generic detail flags
*/
if (flags & PCIIO_PREFETCH)
attributes |= PCI64_ATTR_PREF;
if (flags & PCIIO_NOPREFETCH)
attributes &= ~PCI64_ATTR_PREF;
/* the swap bit is in the address attributes for xbridge */
if (flags & PCIIO_BYTE_STREAM)
attributes |= PCI64_ATTR_SWAP;
if (flags & PCIIO_WORD_VALUES)
attributes &= ~PCI64_ATTR_SWAP;
/* Provider-specific flags
*/
if (flags & PCIBR_BARRIER)
attributes |= PCI64_ATTR_BAR;
if (flags & PCIBR_NOBARRIER)
attributes &= ~PCI64_ATTR_BAR;
if (flags & PCIBR_PREFETCH)
attributes |= PCI64_ATTR_PREF;
if (flags & PCIBR_NOPREFETCH)
attributes &= ~PCI64_ATTR_PREF;
if (flags & PCIBR_PRECISE)
attributes |= PCI64_ATTR_PREC;
if (flags & PCIBR_NOPRECISE)
attributes &= ~PCI64_ATTR_PREC;
if (flags & PCIBR_VCHAN1)
attributes |= PCI64_ATTR_VIRTUAL;
if (flags & PCIBR_VCHAN0)
attributes &= ~PCI64_ATTR_VIRTUAL;
/* PIC in PCI-X mode only supports barrier & swap */
if (IS_PCIX(pcibr_soft)) {
attributes &= (PCI64_ATTR_BAR | PCI64_ATTR_SWAP);
}
return attributes;
}
/*ARGSUSED */
pcibr_dmamap_t
pcibr_dmamap_alloc(vertex_hdl_t pconn_vhdl,
device_desc_t dev_desc,
size_t req_size_max,
unsigned flags)
{
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
vertex_hdl_t xconn_vhdl = pcibr_soft->bs_conn;
pciio_slot_t slot;
xwidgetnum_t xio_port;
xtalk_dmamap_t xtalk_dmamap;
pcibr_dmamap_t pcibr_dmamap;
int ate_count;
int ate_index;
int vchan = VCHAN0;
unsigned long s;
/* merge in forced flags */
flags |= pcibr_soft->bs_dma_flags;
/*
* On SNIA64, these maps are pre-allocated because pcibr_dmamap_alloc()
* can be called within an interrupt thread.
*/
s = pcibr_lock(pcibr_soft);
pcibr_dmamap = (pcibr_dmamap_t)get_free_pciio_dmamap(pcibr_soft->bs_vhdl);
pcibr_unlock(pcibr_soft, s);
if (!pcibr_dmamap)
return 0;
xtalk_dmamap = xtalk_dmamap_alloc(xconn_vhdl, dev_desc, req_size_max,
flags & DMAMAP_FLAGS);
if (!xtalk_dmamap) {
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DMAMAP, pconn_vhdl,
"pcibr_dmamap_alloc: xtalk_dmamap_alloc failed\n"));
free_pciio_dmamap(pcibr_dmamap);
return 0;
}
xio_port = pcibr_soft->bs_mxid;
slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_dmamap->bd_dev = pconn_vhdl;
pcibr_dmamap->bd_slot = PCIBR_DEVICE_TO_SLOT(pcibr_soft, slot);
pcibr_dmamap->bd_soft = pcibr_soft;
pcibr_dmamap->bd_xtalk = xtalk_dmamap;
pcibr_dmamap->bd_max_size = req_size_max;
pcibr_dmamap->bd_xio_port = xio_port;
if (flags & PCIIO_DMA_A64) {
if (!pcibr_try_set_device(pcibr_soft, slot, flags, BRIDGE_DEV_D64_BITS)) {
iopaddr_t pci_addr;
int have_rrbs;
int min_rrbs;
/* Device is capable of A64 operations,
* and the attributes of the DMA are
* consistent with any previous DMA
* mappings using shared resources.
*/
pci_addr = pcibr_flags_to_d64(flags, pcibr_soft);
pcibr_dmamap->bd_flags = flags;
pcibr_dmamap->bd_xio_addr = 0;
pcibr_dmamap->bd_pci_addr = pci_addr;
/* If in PCI mode, make sure we have an RRB (or two).
*/
if (IS_PCI(pcibr_soft) &&
!(pcibr_soft->bs_rrb_fixed & (1 << slot))) {
if (flags & PCIBR_VCHAN1)
vchan = VCHAN1;
have_rrbs = pcibr_soft->bs_rrb_valid[slot][vchan];
if (have_rrbs < 2) {
if (pci_addr & PCI64_ATTR_PREF)
min_rrbs = 2;
else
min_rrbs = 1;
if (have_rrbs < min_rrbs)
pcibr_rrb_alloc_more(pcibr_soft, slot, vchan,
min_rrbs - have_rrbs);
}
}
PCIBR_DEBUG((PCIBR_DEBUG_DMAMAP | PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmamap_alloc: using direct64, map=0x%lx\n",
pcibr_dmamap));
return pcibr_dmamap;
}
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DMAMAP | PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmamap_alloc: unable to use direct64\n"));
/* PIC in PCI-X mode only supports 64-bit direct mapping so
* don't fall thru and try 32-bit direct mapping or 32-bit
* page mapping
*/
if (IS_PCIX(pcibr_soft)) {
kfree(pcibr_dmamap);
return 0;
}
flags &= ~PCIIO_DMA_A64;
}
if (flags & PCIIO_FIXED) {
/* warning: mappings may fail later,
* if direct32 can't get to the address.
*/
if (!pcibr_try_set_device(pcibr_soft, slot, flags, BRIDGE_DEV_D32_BITS)) {
/* User desires DIRECT A32 operations,
* and the attributes of the DMA are
* consistent with any previous DMA
* mappings using shared resources.
* Mapping calls may fail if target
* is outside the direct32 range.
*/
PCIBR_DEBUG((PCIBR_DEBUG_DMAMAP | PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmamap_alloc: using direct32, map=0x%lx\n",
pcibr_dmamap));
pcibr_dmamap->bd_flags = flags;
pcibr_dmamap->bd_xio_addr = pcibr_soft->bs_dir_xbase;
pcibr_dmamap->bd_pci_addr = PCI32_DIRECT_BASE;
return pcibr_dmamap;
}
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DMAMAP | PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmamap_alloc: unable to use direct32\n"));
/* If the user demands FIXED and we can't
* give it to him, fail.
*/
xtalk_dmamap_free(xtalk_dmamap);
free_pciio_dmamap(pcibr_dmamap);
return 0;
}
/*
* Allocate Address Translation Entries from the mapping RAM.
* Unless the PCIBR_NO_ATE_ROUNDUP flag is specified,
* the maximum number of ATEs is based on the worst-case
* scenario, where the requested target is in the
* last byte of an ATE; thus, mapping IOPGSIZE+2
* does end up requiring three ATEs.
*/
if (!(flags & PCIBR_NO_ATE_ROUNDUP)) {
ate_count = IOPG((IOPGSIZE - 1) /* worst case start offset */
+req_size_max /* max mapping bytes */
- 1) + 1; /* round UP */
} else { /* assume requested target is page aligned */
ate_count = IOPG(req_size_max /* max mapping bytes */
- 1) + 1; /* round UP */
}
ate_index = pcibr_ate_alloc(pcibr_soft, ate_count, &pcibr_dmamap->resource);
if (ate_index != -1) {
if (!pcibr_try_set_device(pcibr_soft, slot, flags, BRIDGE_DEV_PMU_BITS)) {
bridge_ate_t ate_proto;
int have_rrbs;
int min_rrbs;
PCIBR_DEBUG((PCIBR_DEBUG_DMAMAP, pconn_vhdl,
"pcibr_dmamap_alloc: using PMU, ate_index=%d, "
"pcibr_dmamap=0x%lx\n", ate_index, pcibr_dmamap));
ate_proto = pcibr_flags_to_ate(pcibr_soft, flags);
pcibr_dmamap->bd_flags = flags;
pcibr_dmamap->bd_pci_addr =
PCI32_MAPPED_BASE + IOPGSIZE * ate_index;
if (flags & PCIIO_BYTE_STREAM)
ATE_SWAP_ON(pcibr_dmamap->bd_pci_addr);
/*
* If swap was set in bss_device in pcibr_endian_set()
* we need to change the address bit.
*/
if (pcibr_soft->bs_slot[slot].bss_device &
BRIDGE_DEV_SWAP_PMU)
ATE_SWAP_ON(pcibr_dmamap->bd_pci_addr);
if (flags & PCIIO_WORD_VALUES)
ATE_SWAP_OFF(pcibr_dmamap->bd_pci_addr);
pcibr_dmamap->bd_xio_addr = 0;
pcibr_dmamap->bd_ate_ptr = pcibr_ate_addr(pcibr_soft, ate_index);
pcibr_dmamap->bd_ate_index = ate_index;
pcibr_dmamap->bd_ate_count = ate_count;
pcibr_dmamap->bd_ate_proto = ate_proto;
/* Make sure we have an RRB (or two).
*/
if (!(pcibr_soft->bs_rrb_fixed & (1 << slot))) {
have_rrbs = pcibr_soft->bs_rrb_valid[slot][vchan];
if (have_rrbs < 2) {
if (ate_proto & ATE_PREF)
min_rrbs = 2;
else
min_rrbs = 1;
if (have_rrbs < min_rrbs)
pcibr_rrb_alloc_more(pcibr_soft, slot, vchan,
min_rrbs - have_rrbs);
}
}
return pcibr_dmamap;
}
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DMAMAP, pconn_vhdl,
"pcibr_dmamap_alloc: PMU use failed, ate_index=%d\n",
ate_index));
pcibr_ate_free(pcibr_soft, ate_index, ate_count, &pcibr_dmamap->resource);
}
/* total failure: sorry, you just can't
* get from here to there that way.
*/
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DMAMAP, pconn_vhdl,
"pcibr_dmamap_alloc: complete failure.\n"));
xtalk_dmamap_free(xtalk_dmamap);
free_pciio_dmamap(pcibr_dmamap);
return 0;
}
/*ARGSUSED */
void
pcibr_dmamap_free(pcibr_dmamap_t pcibr_dmamap)
{
pcibr_soft_t pcibr_soft = pcibr_dmamap->bd_soft;
pciio_slot_t slot = PCIBR_SLOT_TO_DEVICE(pcibr_soft,
pcibr_dmamap->bd_slot);
xtalk_dmamap_free(pcibr_dmamap->bd_xtalk);
if (pcibr_dmamap->bd_flags & PCIIO_DMA_A64) {
pcibr_release_device(pcibr_soft, slot, BRIDGE_DEV_D64_BITS);
}
if (pcibr_dmamap->bd_ate_count) {
pcibr_ate_free(pcibr_dmamap->bd_soft,
pcibr_dmamap->bd_ate_index,
pcibr_dmamap->bd_ate_count,
&pcibr_dmamap->resource);
pcibr_release_device(pcibr_soft, slot, XBRIDGE_DEV_PMU_BITS);
}
PCIBR_DEBUG((PCIBR_DEBUG_DMAMAP, pcibr_dmamap->bd_dev,
"pcibr_dmamap_free: pcibr_dmamap=0x%lx\n", pcibr_dmamap));
free_pciio_dmamap(pcibr_dmamap);
}
/*
* pcibr_addr_xio_to_pci: given a PIO range, hand
* back the corresponding base PCI MEM address;
* this is used to short-circuit DMA requests that
* loop back onto this PCI bus.
*/
static iopaddr_t
pcibr_addr_xio_to_pci(pcibr_soft_t soft,
iopaddr_t xio_addr,
size_t req_size)
{
iopaddr_t xio_lim = xio_addr + req_size - 1;
iopaddr_t pci_addr;
pciio_slot_t slot;
if (IS_PIC_BUSNUM_SOFT(soft, 0)) {
if ((xio_addr >= PICBRIDGE0_PCI_MEM32_BASE) &&
(xio_lim <= PICBRIDGE0_PCI_MEM32_LIMIT)) {
pci_addr = xio_addr - PICBRIDGE0_PCI_MEM32_BASE;
return pci_addr;
}
if ((xio_addr >= PICBRIDGE0_PCI_MEM64_BASE) &&
(xio_lim <= PICBRIDGE0_PCI_MEM64_LIMIT)) {
pci_addr = xio_addr - PICBRIDGE0_PCI_MEM64_BASE;
return pci_addr;
}
} else if (IS_PIC_BUSNUM_SOFT(soft, 1)) {
if ((xio_addr >= PICBRIDGE1_PCI_MEM32_BASE) &&
(xio_lim <= PICBRIDGE1_PCI_MEM32_LIMIT)) {
pci_addr = xio_addr - PICBRIDGE1_PCI_MEM32_BASE;
return pci_addr;
}
if ((xio_addr >= PICBRIDGE1_PCI_MEM64_BASE) &&
(xio_lim <= PICBRIDGE1_PCI_MEM64_LIMIT)) {
pci_addr = xio_addr - PICBRIDGE1_PCI_MEM64_BASE;
return pci_addr;
}
} else {
printk("pcibr_addr_xio_to_pci(): unknown bridge type");
return (iopaddr_t)0;
}
for (slot = soft->bs_min_slot; slot < PCIBR_NUM_SLOTS(soft); ++slot)
if ((xio_addr >= PCIBR_BRIDGE_DEVIO(soft, slot)) &&
(xio_lim < PCIBR_BRIDGE_DEVIO(soft, slot + 1))) {
uint64_t dev;
dev = soft->bs_slot[slot].bss_device;
pci_addr = dev & BRIDGE_DEV_OFF_MASK;
pci_addr <<= BRIDGE_DEV_OFF_ADDR_SHFT;
pci_addr += xio_addr - PCIBR_BRIDGE_DEVIO(soft, slot);
return (dev & BRIDGE_DEV_DEV_IO_MEM) ? pci_addr : PCI_NOWHERE;
}
return 0;
}
/*ARGSUSED */
iopaddr_t
pcibr_dmamap_addr(pcibr_dmamap_t pcibr_dmamap,
paddr_t paddr,
size_t req_size)
{
pcibr_soft_t pcibr_soft;
iopaddr_t xio_addr;
xwidgetnum_t xio_port;
iopaddr_t pci_addr;
unsigned flags;
ASSERT(pcibr_dmamap != NULL);
ASSERT(req_size > 0);
ASSERT(req_size <= pcibr_dmamap->bd_max_size);
pcibr_soft = pcibr_dmamap->bd_soft;
flags = pcibr_dmamap->bd_flags;
xio_addr = xtalk_dmamap_addr(pcibr_dmamap->bd_xtalk, paddr, req_size);
if (XIO_PACKED(xio_addr)) {
xio_port = XIO_PORT(xio_addr);
xio_addr = XIO_ADDR(xio_addr);
} else
xio_port = pcibr_dmamap->bd_xio_port;
/* If this DMA is to an address that
* refers back to this Bridge chip,
* reduce it back to the correct
* PCI MEM address.
*/
if (xio_port == pcibr_soft->bs_xid) {
pci_addr = pcibr_addr_xio_to_pci(pcibr_soft, xio_addr, req_size);
} else if (flags & PCIIO_DMA_A64) {
/* A64 DMA:
* always use 64-bit direct mapping,
* which always works.
* Device(x) was set up during
* dmamap allocation.
*/
/* attributes are already bundled up into bd_pci_addr.
*/
pci_addr = pcibr_dmamap->bd_pci_addr
| ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT)
| xio_addr;
/* Bridge Hardware WAR #482836:
* If the transfer is not cache aligned
* and the Bridge Rev is <= B, force
* prefetch to be off.
*/
if (flags & PCIBR_NOPREFETCH)
pci_addr &= ~PCI64_ATTR_PREF;
PCIBR_DEBUG((PCIBR_DEBUG_DMAMAP | PCIBR_DEBUG_DMADIR,
pcibr_dmamap->bd_dev,
"pcibr_dmamap_addr: (direct64): wanted paddr [0x%lx..0x%lx] "
"XIO port 0x%x offset 0x%lx, returning PCI 0x%lx\n",
paddr, paddr + req_size - 1, xio_port, xio_addr, pci_addr));
} else if (flags & PCIIO_FIXED) {
/* A32 direct DMA:
* always use 32-bit direct mapping,
* which may fail.
* Device(x) was set up during
* dmamap allocation.
*/
if (xio_port != pcibr_soft->bs_dir_xport)
pci_addr = 0; /* wrong DIDN */
else if (xio_addr < pcibr_dmamap->bd_xio_addr)
pci_addr = 0; /* out of range */
else if ((xio_addr + req_size) >
(pcibr_dmamap->bd_xio_addr + BRIDGE_DMA_DIRECT_SIZE))
pci_addr = 0; /* out of range */
else
pci_addr = pcibr_dmamap->bd_pci_addr +
xio_addr - pcibr_dmamap->bd_xio_addr;
PCIBR_DEBUG((PCIBR_DEBUG_DMAMAP | PCIBR_DEBUG_DMADIR,
pcibr_dmamap->bd_dev,
"pcibr_dmamap_addr (direct32): wanted paddr [0x%lx..0x%lx] "
"XIO port 0x%x offset 0x%lx, returning PCI 0x%lx\n",
paddr, paddr + req_size - 1, xio_port, xio_addr, pci_addr));
} else {
iopaddr_t offset = IOPGOFF(xio_addr);
bridge_ate_t ate_proto = pcibr_dmamap->bd_ate_proto;
int ate_count = IOPG(offset + req_size - 1) + 1;
int ate_index = pcibr_dmamap->bd_ate_index;
bridge_ate_t ate;
ate = ate_proto | (xio_addr - offset);
ate |= (xio_port << ATE_TIDSHIFT);
pci_addr = pcibr_dmamap->bd_pci_addr + offset;
/* Fill in our mapping registers
* with the appropriate xtalk data,
* and hand back the PCI address.
*/
ASSERT(ate_count > 0);
if (ate_count <= pcibr_dmamap->bd_ate_count) {
ate_write(pcibr_soft, ate_index, ate_count, ate);
PCIBR_DEBUG((PCIBR_DEBUG_DMAMAP, pcibr_dmamap->bd_dev,
"pcibr_dmamap_addr (PMU) : wanted paddr "
"[0x%lx..0x%lx] returning PCI 0x%lx\n",
paddr, paddr + req_size - 1, pci_addr));
} else {
/* The number of ATE's required is greater than the number
* allocated for this map. One way this can happen is if
* pcibr_dmamap_alloc() was called with the PCIBR_NO_ATE_ROUNDUP
* flag, and then when that map is used (right now), the
* target address tells us we really did need to roundup.
* The other possibility is that the map is just plain too
* small to handle the requested target area.
*/
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DMAMAP, pcibr_dmamap->bd_dev,
"pcibr_dmamap_addr (PMU) : wanted paddr "
"[0x%lx..0x%lx] ate_count 0x%x bd_ate_count 0x%x "
"ATE's required > number allocated\n",
paddr, paddr + req_size - 1,
ate_count, pcibr_dmamap->bd_ate_count));
pci_addr = 0;
}
}
return pci_addr;
}
/*ARGSUSED */
void
pcibr_dmamap_done(pcibr_dmamap_t pcibr_dmamap)
{
xtalk_dmamap_done(pcibr_dmamap->bd_xtalk);
PCIBR_DEBUG((PCIBR_DEBUG_DMAMAP, pcibr_dmamap->bd_dev,
"pcibr_dmamap_done: pcibr_dmamap=0x%lx\n", pcibr_dmamap));
}
/*
* For each bridge, the DIR_OFF value in the Direct Mapping Register
* determines the PCI to Crosstalk memory mapping to be used for all
* 32-bit Direct Mapping memory accesses. This mapping can be to any
* node in the system. This function will return that compact node id.
*/
/*ARGSUSED */
cnodeid_t
pcibr_get_dmatrans_node(vertex_hdl_t pconn_vhdl)
{
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
return NASID_TO_COMPACT_NODEID(NASID_GET(pcibr_soft->bs_dir_xbase));
}
/*ARGSUSED */
iopaddr_t
pcibr_dmatrans_addr(vertex_hdl_t pconn_vhdl,
device_desc_t dev_desc,
paddr_t paddr,
size_t req_size,
unsigned flags)
{
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
vertex_hdl_t xconn_vhdl = pcibr_soft->bs_conn;
pciio_slot_t pciio_slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_soft_slot_t slotp = &pcibr_soft->bs_slot[pciio_slot];
xwidgetnum_t xio_port;
iopaddr_t xio_addr;
iopaddr_t pci_addr;
int have_rrbs;
int min_rrbs;
int vchan = VCHAN0;
/* merge in forced flags */
flags |= pcibr_soft->bs_dma_flags;
xio_addr = xtalk_dmatrans_addr(xconn_vhdl, 0, paddr, req_size,
flags & DMAMAP_FLAGS);
if (!xio_addr) {
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xtalk_dmatrans_addr failed with 0x%lx\n",
paddr, paddr + req_size - 1, xio_addr));
return 0;
}
/*
* find which XIO port this goes to.
*/
if (XIO_PACKED(xio_addr)) {
if (xio_addr == XIO_NOWHERE) {
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xtalk_dmatrans_addr failed with XIO_NOWHERE\n",
paddr, paddr + req_size - 1));
return 0;
}
xio_port = XIO_PORT(xio_addr);
xio_addr = XIO_ADDR(xio_addr);
} else
xio_port = pcibr_soft->bs_mxid;
/*
* If this DMA comes back to us,
* return the PCI MEM address on
* which it would land, or NULL
* if the target is something
* on bridge other than PCI MEM.
*/
if (xio_port == pcibr_soft->bs_xid) {
pci_addr = pcibr_addr_xio_to_pci(pcibr_soft, xio_addr, req_size);
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xio_port=0x%x, pci_addr=0x%lx\n",
paddr, paddr + req_size - 1, xio_port, pci_addr));
return pci_addr;
}
/* If the caller can use A64, try to
* satisfy the request with the 64-bit
* direct map. This can fail if the
* configuration bits in Device(x)
* conflict with our flags.
*/
if (flags & PCIIO_DMA_A64) {
pci_addr = slotp->bss_d64_base;
if (!(flags & PCIBR_VCHAN1))
flags |= PCIBR_VCHAN0;
if ((pci_addr != PCIBR_D64_BASE_UNSET) &&
(flags == slotp->bss_d64_flags)) {
pci_addr |= xio_addr |
((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT);
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xio_port=0x%x, direct64: pci_addr=0x%lx\n",
paddr, paddr + req_size - 1, xio_addr, pci_addr));
return pci_addr;
}
if (!pcibr_try_set_device(pcibr_soft, pciio_slot, flags, BRIDGE_DEV_D64_BITS)) {
pci_addr = pcibr_flags_to_d64(flags, pcibr_soft);
slotp->bss_d64_flags = flags;
slotp->bss_d64_base = pci_addr;
pci_addr |= xio_addr
| ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT);
/* If in PCI mode, make sure we have an RRB (or two).
*/
if (IS_PCI(pcibr_soft) &&
!(pcibr_soft->bs_rrb_fixed & (1 << pciio_slot))) {
if (flags & PCIBR_VCHAN1)
vchan = VCHAN1;
have_rrbs = pcibr_soft->bs_rrb_valid[pciio_slot][vchan];
if (have_rrbs < 2) {
if (pci_addr & PCI64_ATTR_PREF)
min_rrbs = 2;
else
min_rrbs = 1;
if (have_rrbs < min_rrbs)
pcibr_rrb_alloc_more(pcibr_soft, pciio_slot, vchan,
min_rrbs - have_rrbs);
}
}
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xio_port=0x%x, direct64: pci_addr=0x%lx, "
"new flags: 0x%x\n", paddr, paddr + req_size - 1,
xio_addr, pci_addr, (uint64_t) flags));
return pci_addr;
}
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xio_port=0x%x, Unable to set direct64 Device(x) bits\n",
paddr, paddr + req_size - 1, xio_addr));
/* PIC only supports 64-bit direct mapping in PCI-X mode */
if (IS_PCIX(pcibr_soft)) {
return 0;
}
/* our flags conflict with Device(x). try direct32*/
flags = flags & ~(PCIIO_DMA_A64 | PCIBR_VCHAN0);
} else {
/* BUS in PCI-X mode only supports 64-bit direct mapping */
if (IS_PCIX(pcibr_soft)) {
return 0;
}
}
/* Try to satisfy the request with the 32-bit direct
* map. This can fail if the configuration bits in
* Device(x) conflict with our flags, or if the
* target address is outside where DIR_OFF points.
*/
{
size_t map_size = 1ULL << 31;
iopaddr_t xio_base = pcibr_soft->bs_dir_xbase;
iopaddr_t offset = xio_addr - xio_base;
iopaddr_t endoff = req_size + offset;
if ((req_size > map_size) ||
(xio_addr < xio_base) ||
(xio_port != pcibr_soft->bs_dir_xport) ||
(endoff > map_size)) {
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xio_port=0x%x, xio region outside direct32 target\n",
paddr, paddr + req_size - 1, xio_addr));
} else {
pci_addr = slotp->bss_d32_base;
if ((pci_addr != PCIBR_D32_BASE_UNSET) &&
(flags == slotp->bss_d32_flags)) {
pci_addr |= offset;
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx],"
" xio_port=0x%x, direct32: pci_addr=0x%lx\n",
paddr, paddr + req_size - 1, xio_addr, pci_addr));
return pci_addr;
}
if (!pcibr_try_set_device(pcibr_soft, pciio_slot, flags, BRIDGE_DEV_D32_BITS)) {
pci_addr = PCI32_DIRECT_BASE;
slotp->bss_d32_flags = flags;
slotp->bss_d32_base = pci_addr;
pci_addr |= offset;
/* Make sure we have an RRB (or two).
*/
if (!(pcibr_soft->bs_rrb_fixed & (1 << pciio_slot))) {
have_rrbs = pcibr_soft->bs_rrb_valid[pciio_slot][vchan];
if (have_rrbs < 2) {
if (slotp->bss_device & BRIDGE_DEV_PREF)
min_rrbs = 2;
else
min_rrbs = 1;
if (have_rrbs < min_rrbs)
pcibr_rrb_alloc_more(pcibr_soft, pciio_slot,
vchan, min_rrbs - have_rrbs);
}
}
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx],"
" xio_port=0x%x, direct32: pci_addr=0x%lx, "
"new flags: 0x%x\n", paddr, paddr + req_size - 1,
xio_addr, pci_addr, (uint64_t) flags));
return pci_addr;
}
/* our flags conflict with Device(x).
*/
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xio_port=0x%x, Unable to set direct32 Device(x) bits\n",
paddr, paddr + req_size - 1, xio_port));
}
}
PCIBR_DEBUG((PCIBR_DEBUG_DMADIR, pconn_vhdl,
"pcibr_dmatrans_addr: wanted paddr [0x%lx..0x%lx], "
"xio_port=0x%x, No acceptable PCI address found\n",
paddr, paddr + req_size - 1, xio_port));
return 0;
}
void
pcibr_dmamap_drain(pcibr_dmamap_t map)
{
xtalk_dmamap_drain(map->bd_xtalk);
}
void
pcibr_dmaaddr_drain(vertex_hdl_t pconn_vhdl,
paddr_t paddr,
size_t bytes)
{
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
vertex_hdl_t xconn_vhdl = pcibr_soft->bs_conn;
xtalk_dmaaddr_drain(xconn_vhdl, paddr, bytes);
}
/*
* Get the starting PCIbus address out of the given DMA map.
* This function is supposed to be used by a close friend of PCI bridge
* since it relies on the fact that the starting address of the map is fixed at
* the allocation time in the current implementation of PCI bridge.
*/
iopaddr_t
pcibr_dmamap_pciaddr_get(pcibr_dmamap_t pcibr_dmamap)
{
return pcibr_dmamap->bd_pci_addr;
}
/* =====================================================================
* CONFIGURATION MANAGEMENT
*/
/*ARGSUSED */
void
pcibr_provider_startup(vertex_hdl_t pcibr)
{
}
/*ARGSUSED */
void
pcibr_provider_shutdown(vertex_hdl_t pcibr)
{
}
int
pcibr_reset(vertex_hdl_t conn)
{
BUG();
return -1;
}
pciio_endian_t
pcibr_endian_set(vertex_hdl_t pconn_vhdl,
pciio_endian_t device_end,
pciio_endian_t desired_end)
{
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
pciio_slot_t pciio_slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
uint64_t devreg;
unsigned long s;
/*
* Bridge supports hardware swapping; so we can always
* arrange for the caller's desired endianness.
*/
s = pcibr_lock(pcibr_soft);
devreg = pcibr_soft->bs_slot[pciio_slot].bss_device;
if (device_end != desired_end)
devreg |= BRIDGE_DEV_SWAP_BITS;
else
devreg &= ~BRIDGE_DEV_SWAP_BITS;
/* NOTE- if we ever put SWAP bits
* onto the disabled list, we will
* have to change the logic here.
*/
if (pcibr_soft->bs_slot[pciio_slot].bss_device != devreg) {
pcireg_device_set(pcibr_soft, pciio_slot, devreg);
pcibr_soft->bs_slot[pciio_slot].bss_device = devreg;
pcireg_tflush_get(pcibr_soft);
}
pcibr_unlock(pcibr_soft, s);
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DEVREG, pconn_vhdl,
"pcibr_endian_set: Device(%d): 0x%x\n",
pciio_slot, devreg));
return desired_end;
}
/*
* Interfaces to allow special (e.g. SGI) drivers to set/clear
* Bridge-specific device flags. Many flags are modified through
* PCI-generic interfaces; we don't allow them to be directly
* manipulated here. Only flags that at this point seem pretty
* Bridge-specific can be set through these special interfaces.
* We may add more flags as the need arises, or remove flags and
* create PCI-generic interfaces as the need arises.
*
* Returns 0 on failure, 1 on success
*/
int
pcibr_device_flags_set(vertex_hdl_t pconn_vhdl,
pcibr_device_flags_t flags)
{
pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
pciio_slot_t pciio_slot = PCIBR_INFO_SLOT_GET_INT(pciio_info);
pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
uint64_t set = 0;
uint64_t clr = 0;
ASSERT((flags & PCIBR_DEVICE_FLAGS) == flags);
if (flags & PCIBR_WRITE_GATHER)
set |= BRIDGE_DEV_PMU_WRGA_EN;
if (flags & PCIBR_NOWRITE_GATHER)
clr |= BRIDGE_DEV_PMU_WRGA_EN;
if (flags & PCIBR_PREFETCH)
set |= BRIDGE_DEV_PREF;
if (flags & PCIBR_NOPREFETCH)
clr |= BRIDGE_DEV_PREF;
if (flags & PCIBR_PRECISE)
set |= BRIDGE_DEV_PRECISE;
if (flags & PCIBR_NOPRECISE)
clr |= BRIDGE_DEV_PRECISE;
if (flags & PCIBR_BARRIER)
set |= BRIDGE_DEV_BARRIER;
if (flags & PCIBR_NOBARRIER)
clr |= BRIDGE_DEV_BARRIER;
if (flags & PCIBR_64BIT)
set |= BRIDGE_DEV_DEV_SIZE;
if (flags & PCIBR_NO64BIT)
clr |= BRIDGE_DEV_DEV_SIZE;
/* PIC BRINGUP WAR (PV# 878674): Don't allow 64bit PIO accesses */
if ((flags & PCIBR_64BIT) && PCIBR_WAR_ENABLED(PV878674, pcibr_soft)) {
set &= ~BRIDGE_DEV_DEV_SIZE;
}
if (set || clr) {
uint64_t devreg;
unsigned long s;
s = pcibr_lock(pcibr_soft);
devreg = pcibr_soft->bs_slot[pciio_slot].bss_device;
devreg = (devreg & ~clr) | set;
if (pcibr_soft->bs_slot[pciio_slot].bss_device != devreg) {
pcireg_device_set(pcibr_soft, pciio_slot, devreg);
pcibr_soft->bs_slot[pciio_slot].bss_device = devreg;
pcireg_tflush_get(pcibr_soft);
}
pcibr_unlock(pcibr_soft, s);
PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_DEVREG, pconn_vhdl,
"pcibr_device_flags_set: Device(%d): 0x%x\n",
pciio_slot, devreg));
}
return 1;
}
/*
* PIC has 16 RBARs per bus; meaning it can have a total of 16 outstanding
* split transactions. If the functions on the bus have requested a total
* of 16 or less, then we can give them what they requested (ie. 100%).
* Otherwise we have make sure each function can get at least one buffer
* and then divide the rest of the buffers up among the functions as ``A
* PERCENTAGE OF WHAT THEY REQUESTED'' (i.e. 0% - 100% of a function's
* pcix_type0_status.max_out_split). This percentage does not include the
* one RBAR that all functions get by default.
*/
int
pcibr_pcix_rbars_calc(pcibr_soft_t pcibr_soft)
{
/* 'percent_allowed' is the percentage of requested RBARs that functions
* are allowed, ***less the 1 RBAR that all functions get by default***
*/
int percent_allowed;
if (pcibr_soft->bs_pcix_num_funcs) {
if (pcibr_soft->bs_pcix_num_funcs > NUM_RBAR) {
printk(KERN_WARNING
"%lx: Must oversubscribe Read Buffer Attribute Registers"
"(RBAR). Bus has %d RBARs but %d funcs need them.\n",
pcibr_soft->bs_name, NUM_RBAR, pcibr_soft->bs_pcix_num_funcs);
percent_allowed = 0;
} else {
percent_allowed = (((NUM_RBAR-pcibr_soft->bs_pcix_num_funcs)*100) /
pcibr_soft->bs_pcix_split_tot);
/* +1 to percentage to solve rounding errors that occur because
* we're not doing fractional math. (ie. ((3 * 66%) / 100) = 1)
* but should be "2" if doing true fractional math. NOTE: Since
* the greatest number of outstanding transactions a function
* can request is 32, this "+1" will always work (i.e. we won't
* accidentally oversubscribe the RBARs because of this rounding
* of the percentage).
*/
percent_allowed=(percent_allowed > 100) ? 100 : percent_allowed+1;
}
} else {
return -ENODEV;
}
return percent_allowed;
}
/*
* pcibr_debug() is used to print pcibr debug messages to the console. A
* user enables tracing by setting the following global variables:
*
* pcibr_debug_mask -Bitmask of what to trace. see pcibr_private.h
* pcibr_debug_module -Module to trace. 'all' means trace all modules
* pcibr_debug_widget -Widget to trace. '-1' means trace all widgets
* pcibr_debug_slot -Slot to trace. '-1' means trace all slots
*
* 'type' is the type of debugging that the current PCIBR_DEBUG macro is
* tracing. 'vhdl' (which can be NULL) is the vhdl associated with the
* debug statement. If there is a 'vhdl' associated with this debug
* statement, it is parsed to obtain the module, widget, and slot. If the
* globals above match the PCIBR_DEBUG params, then the debug info in the
* parameter 'format' is sent to the console.
*/
void
pcibr_debug(uint32_t type, vertex_hdl_t vhdl, char *format, ...)
{
char hwpath[MAXDEVNAME] = "\0";
char copy_of_hwpath[MAXDEVNAME];
char *buffer;
char *module = "all";
short widget = -1;
short slot = -1;
va_list ap;
if (pcibr_debug_mask & type) {
if (vhdl) {
if (!hwgraph_vertex_name_get(vhdl, hwpath, MAXDEVNAME)) {
char *cp;
if (strcmp(module, pcibr_debug_module)) {
/* use a copy */
(void)strcpy(copy_of_hwpath, hwpath);
cp = strstr(copy_of_hwpath, "/" EDGE_LBL_MODULE "/");
if (cp) {
cp += strlen("/" EDGE_LBL_MODULE "/");
module = strsep(&cp, "/");
}
}
if (pcibr_debug_widget != -1) {
cp = strstr(hwpath, "/" EDGE_LBL_XTALK "/");
if (cp) {
cp += strlen("/" EDGE_LBL_XTALK "/");
widget = simple_strtoul(cp, NULL, 0);
}
}
if (pcibr_debug_slot != -1) {
cp = strstr(hwpath, "/" EDGE_LBL_PCIX_0 "/");
if (!cp) {
cp = strstr(hwpath, "/" EDGE_LBL_PCIX_1 "/");
}
if (cp) {
cp += strlen("/" EDGE_LBL_PCIX_0 "/");
slot = simple_strtoul(cp, NULL, 0);
}
}
}
}
if ((vhdl == NULL) ||
(!strcmp(module, pcibr_debug_module) &&
(widget == pcibr_debug_widget) &&
(slot == pcibr_debug_slot))) {
buffer = kmalloc(1024, GFP_KERNEL);
if (buffer) {
printk("PCIBR_DEBUG<%d>\t: %s :", smp_processor_id(), hwpath);
/*
* KERN_MSG translates to this 3 line sequence. Since
* we have a variable length argument list, we need to
* call KERN_MSG this way rather than directly
*/
va_start(ap, format);
memset(buffer, 0, 1024);
vsnprintf(buffer, 1024, format, ap);
va_end(ap);
printk("", "%s", buffer);
kfree(buffer);
}
}
}
}
/*
* given a xconn_vhdl and a bus number under that widget, return a
* bridge_t pointer.
*/
void *
pcibr_bridge_ptr_get(vertex_hdl_t widget_vhdl, int bus_num)
{
void *bridge;
bridge = (void *)xtalk_piotrans_addr(widget_vhdl, 0, 0,
sizeof(bridge), 0);
/* PIC ASIC has two bridges (ie. two buses) under a single widget */
if (bus_num == 1) {
bridge = (void *)((char *)bridge + PIC_BUS1_OFFSET);
}
return bridge;
}
int
isIO9(nasid_t nasid)
{
lboard_t *brd = (lboard_t *)KL_CONFIG_INFO(nasid);
while (brd) {
if (brd->brd_flags & LOCAL_MASTER_IO6) {
return 1;
}
if (numionodes == numnodes)
brd = KLCF_NEXT_ANY(brd);
else
brd = KLCF_NEXT(brd);
}
/* if it's dual ported, check the peer also */
nasid = NODEPDA(NASID_TO_COMPACT_NODEID(nasid))->xbow_peer;
if (nasid < 0) return 0;
brd = (lboard_t *)KL_CONFIG_INFO(nasid);
while (brd) {
if (brd->brd_flags & LOCAL_MASTER_IO6) {
return 1;
}
if (numionodes == numnodes)
brd = KLCF_NEXT_ANY(brd);
else
brd = KLCF_NEXT(brd);
}
return 0;
}
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