Quelle lba_pci.c
Sprache: C
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* *
* * PCI Lower Bus Adapter ( LBA ) manager
* *
* * ( c ) Copyright 1999 , 2000 Grant Grundler
* * ( c ) Copyright 1999 , 2000 Hewlett - Packard Company
* *
* *
* *
* * This module primarily provides access to PCI bus ( config / IOport
* * spaces ) on platforms with an SBA / LBA chipset . A / B / C / J / L / N - class
* * with 4 digit model numbers - eg C3000 ( and A400 . . . sigh ) .
* *
* * LBA driver isn ' t as simple as the Dino driver because :
* * ( a ) this chip has substantial bug fixes between revisions
* * ( Only one Dino bug has a software workaround : ^ ( )
* * ( b ) has more options which we don ' t ( yet ) support ( DMA hints , OLARD )
* * ( c ) IRQ support lives in the I / O SAPIC driver ( not with PCI driver )
* * ( d ) play nicely with both PAT and " Legacy " PA - RISC firmware ( PDC ) .
* * ( dino only deals with " Legacy " PDC )
* *
* * LBA driver passes the I / O SAPIC HPA to the I / O SAPIC driver .
* * ( I / O SAPIC is integratd in the LBA chip ) .
* *
* * FIXME : Add support to SBA and LBA drivers for DMA hint sets
* * FIXME : Add support for PCI card hot - plug ( OLARD ) .
*/
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/init.h> /* for __init */
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <asm /byteorder.h>
#include <asm /pdc.h>
#include <asm /pdcpat.h>
#include <asm /page.h>
#include <asm /ropes.h>
#include <asm /hardware.h> /* for register_parisc_driver() stuff */
#include <asm /parisc-device.h>
#include <asm /io.h> /* read/write stuff */
#include "iommu.h"
#undef DEBUG_LBA /* general stuff */
#undef DEBUG_LBA_PORT /* debug I/O Port access */
#undef DEBUG_LBA_CFG /* debug Config Space Access (ie PCI Bus walk) */
#undef DEBUG_LBA_PAT /* debug PCI Resource Mgt code - PDC PAT only */
#undef FBB_SUPPORT /* Fast Back-Back xfers - NOT READY YET */
#ifdef DEBUG_LBA
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
#ifdef DEBUG_LBA_PORT
#define DBG_PORT(x...) printk(x)
#else
#define DBG_PORT(x...)
#endif
#ifdef DEBUG_LBA_CFG
#define DBG_CFG(x...) printk(x)
#else
#define DBG_CFG(x...)
#endif
#ifdef DEBUG_LBA_PAT
#define DBG_PAT(x...) printk(x)
#else
#define DBG_PAT(x...)
#endif
/*
* * Config accessor functions only pass in the 8 - bit bus number and not
* * the 8 - bit " PCI Segment " number . Each LBA will be assigned a PCI bus
* * number based on what firmware wrote into the scratch register .
* *
* * The " secondary " bus number is set to this before calling
* * pci_register_ops ( ) . If any PPB ' s are present , the scan will
* * discover them and update the " secondary " and " subordinate "
* * fields in the pci_bus structure .
* *
* * Changes in the configuration * may * result in a different
* * bus number for each LBA depending on what firmware does .
*/
#define MODULE_NAME "LBA"
/* non-postable I/O port space, densely packed */
#define LBA_PORT_BASE (PCI_F_EXTEND | 0 xfee00000UL)
static void __iomem *astro_iop_base __read_mostly;
static u32 lba_t32;
/* lba flags */
#define LBA_FLAG_SKIP_PROBE 0 x10
#define LBA_SKIP_PROBE(d) ((d)->flags & LBA_FLAG_SKIP_PROBE)
static inline struct lba_device *LBA_DEV(struct pci_hba_data *hba)
{
return container_of(hba, struct lba_device, hba);
}
/*
* * Only allow 8 subsidiary busses per LBA
* * Problem is the PCI bus numbering is globally shared .
*/
#define LBA_MAX_NUM_BUSES 8
/************************************
* LBA register read and write support
*
* BE WARNED : register writes are posted .
* ( ie follow writes which must reach HW with a read )
*/
#define READ_U8(addr) __raw_readb(addr)
#define READ_U16(addr) __raw_readw(addr)
#define READ_U32(addr) __raw_readl(addr)
#define WRITE_U8(value, addr) __raw_writeb(value, addr)
#define WRITE_U16(value, addr) __raw_writew(value, addr)
#define WRITE_U32(value, addr) __raw_writel(value, addr)
#define READ_REG8(addr) readb(addr)
#define READ_REG16(addr) readw(addr)
#define READ_REG32(addr) readl(addr)
#define READ_REG64(addr) readq(addr)
#define WRITE_REG8(value, addr) writeb(value, addr)
#define WRITE_REG16(value, addr) writew(value, addr)
#define WRITE_REG32(value, addr) writel(value, addr)
#define LBA_CFG_TOK(bus,dfn) ((u32) ((bus)<<16 | (dfn)<<8 ))
#define LBA_CFG_BUS(tok) ((u8) ((tok)>>16 ))
#define LBA_CFG_DEV(tok) ((u8) ((tok)>>11 ) & 0 x1f)
#define LBA_CFG_FUNC(tok) ((u8) ((tok)>>8 ) & 0 x7)
/*
* * Extract LBA ( Rope ) number from HPA
* * REVISIT : 16 ropes for Stretch / Ike ?
*/
#define ROPES_PER_IOC 8
#define LBA_NUM(x) ((((unsigned long ) x) >> 13 ) & (ROPES_PER_IOC-1 ))
static void
lba_dump_res(struct resource *r, int d)
{
int i;
if (NULL == r)
return ;
printk(KERN_DEBUG "(%p)" , r->parent);
for (i = d; i ; --i) printk(" " );
printk(KERN_DEBUG "%p [%lx,%lx]/%lx\n" , r,
(long )r->start, (long )r->end, r->flags);
lba_dump_res(r->child, d+2 );
lba_dump_res(r->sibling, d);
}
/*
* * LBA rev 2 . 0 , 2 . 1 , 2 . 2 , and 3 . 0 bus walks require a complex
* * workaround for cfg cycles :
* * - - preserve LBA state
* * - - prevent any DMA from occurring
* * - - turn on smart mode
* * - - probe with config writes before doing config reads
* * - - check ERROR_STATUS
* * - - clear ERROR_STATUS
* * - - restore LBA state
* *
* * The workaround is only used for device discovery .
*/
static int lba_device_present(u8 bus, u8 dfn, struct lba_device *d)
{
u8 first_bus = d->hba.hba_bus->busn_res.start;
u8 last_sub_bus = d->hba.hba_bus->busn_res.end;
if ((bus < first_bus) ||
(bus > last_sub_bus) ||
((bus - first_bus) >= LBA_MAX_NUM_BUSES)) {
return 0 ;
}
return 1 ;
}
#define LBA_CFG_SETUP(d, tok) { \
/* Save contents of error config register. */ \
error_config = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG); \
\
/* Save contents of status control register. */ \
status_control = READ_REG32(d->hba.base_addr + LBA_STAT_CTL); \
\
/* For LBA rev 2.0, 2.1, 2.2, and 3.0, we must disable DMA \
* * arbitration for full bus walks . \
*/ \
/* Save contents of arb mask register. */ \
arb_mask = READ_REG32(d->hba.base_addr + LBA_ARB_MASK); \
\
/* \
* Turn off all device arbitration bits ( i . e . everything \
* except arbitration enable bit ) . \
*/ \
WRITE_REG32(0 x1, d->hba.base_addr + LBA_ARB_MASK); \
\
/* \
* Set the smart mode bit so that master aborts don ' t cause \
* LBA to go into PCI fatal mode ( required ) . \
*/ \
WRITE_REG32(error_config | LBA_SMART_MODE, d->hba.base_addr + LBA_ERROR_CONFIG); \
}
#define LBA_CFG_PROBE(d, tok) { \
/* \
* Setup Vendor ID write and read back the address register \
* to make sure that LBA is the bus master . \
*/ \
WRITE_REG32(tok | PCI_VENDOR_ID, (d)->hba.base_addr + LBA_PCI_CFG_ADDR);\
/* \
* Read address register to ensure that LBA is the bus master , \
* which implies that DMA traffic has stopped when DMA arb is off . \
*/ \
lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
/* \
* Generate a cfg write cycle ( will have no affect on \
* Vendor ID register since read - only ) . \
*/ \
WRITE_REG32(~0 , (d)->hba.base_addr + LBA_PCI_CFG_DATA); \
/* \
* Make sure write has completed before proceeding further , \
* i . e . before setting clear enable . \
*/ \
lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
}
/*
* HPREVISIT :
* - - Can ' t tell if config cycle got the error .
*
* OV bit is broken until rev 4 . 0 , so can ' t use OV bit and
* LBA_ERROR_LOG_ADDR to tell if error belongs to config cycle .
*
* As of rev 4 . 0 , no longer need the error check .
*
* - - Even if we could tell , we still want to return - 1
* for * * ANY * * error ( not just master abort ) .
*
* - - Only clear non - fatal errors ( we don ' t want to bring
* LBA out of pci - fatal mode ) .
*
* Actually , there is still a race in which
* we could be clearing a fatal error . We will
* live with this during our initial bus walk
* until rev 4 . 0 ( no driver activity during
* initial bus walk ) . The initial bus walk
* has race conditions concerning the use of
* smart mode as well .
*/
#define LBA_MASTER_ABORT_ERROR 0 xc
#define LBA_FATAL_ERROR 0 x10
#define LBA_CFG_MASTER_ABORT_CHECK(d, base, tok, error) { \
u32 error_status = 0 ; \
/* \
* Set clear enable ( CE ) bit . Unset by HW when new \
* errors are logged - - LBA HW ERS section 14 . 3 . 3 ) . \
*/ \
WRITE_REG32(status_control | CLEAR_ERRLOG_ENABLE, base + LBA_STAT_CTL); \
error_status = READ_REG32(base + LBA_ERROR_STATUS); \
if ((error_status & 0 x1f) != 0 ) { \
/* \
* Fail the config read request . \
*/ \
error = 1 ; \
if ((error_status & LBA_FATAL_ERROR) == 0 ) { \
/* \
* Clear error status ( if fatal bit not set ) by setting \
* clear error log bit ( CL ) . \
*/ \
WRITE_REG32(status_control | CLEAR_ERRLOG, base + LBA_STAT_CTL); \
} \
} \
}
#define LBA_CFG_TR4_ADDR_SETUP(d, addr) \
WRITE_REG32(((addr) & ~3 ), (d)->hba.base_addr + LBA_PCI_CFG_ADDR);
#define LBA_CFG_ADDR_SETUP(d, addr) { \
WRITE_REG32(((addr) & ~3 ), (d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
/* \
* Read address register to ensure that LBA is the bus master , \
* which implies that DMA traffic has stopped when DMA arb is off . \
*/ \
lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
}
#define LBA_CFG_RESTORE(d, base) { \
/* \
* Restore status control register ( turn off clear enable ) . \
*/ \
WRITE_REG32(status_control, base + LBA_STAT_CTL); \
/* \
* Restore error config register ( turn off smart mode ) . \
*/ \
WRITE_REG32(error_config, base + LBA_ERROR_CONFIG); \
/* \
* Restore arb mask register ( reenables DMA arbitration ) . \
*/ \
WRITE_REG32(arb_mask, base + LBA_ARB_MASK); \
}
static unsigned int
lba_rd_cfg(struct lba_device *d, u32 tok, u8 reg, u32 size)
{
u32 data = ~0 U;
int error = 0 ;
u32 arb_mask = 0 ; /* used by LBA_CFG_SETUP/RESTORE */
u32 error_config = 0 ; /* used by LBA_CFG_SETUP/RESTORE */
u32 status_control = 0 ; /* used by LBA_CFG_SETUP/RESTORE */
LBA_CFG_SETUP(d, tok);
LBA_CFG_PROBE(d, tok);
LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error);
if (!error) {
void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
LBA_CFG_ADDR_SETUP(d, tok | reg);
switch (size) {
case 1 : data = (u32) READ_REG8(data_reg + (reg & 3 )); break ;
case 2 : data = (u32) READ_REG16(data_reg+ (reg & 2 )); break ;
case 4 : data = READ_REG32(data_reg); break ;
}
}
LBA_CFG_RESTORE(d, d->hba.base_addr);
return (data);
}
static int elroy_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
{
struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
u32 tok = LBA_CFG_TOK(local_bus, devfn);
void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
if ((pos > 255 ) || (devfn > 255 ))
return -EINVAL;
/* FIXME: B2K/C3600 workaround is always use old method... */
/* if (!LBA_SKIP_PROBE(d)) */ {
/* original - Generate config cycle on broken elroy
with risk we will miss PCI bus errors. */
*data = lba_rd_cfg(d, tok, pos, size);
DBG_CFG("%s(%x+%2x) -> 0x%x (a)\n" , __func__, tok, pos, *data);
return 0 ;
}
if (LBA_SKIP_PROBE(d) && !lba_device_present(bus->busn_res.start, devfn, d)) {
DBG_CFG("%s(%x+%2x) -> -1 (b)\n" , __func__, tok, pos);
/* either don't want to look or know device isn't present. */
*data = ~0 U;
return (0 );
}
/* Basic Algorithm
* * Should only get here on fully working LBA rev .
* * This is how simple the code should have been .
*/
LBA_CFG_ADDR_SETUP(d, tok | pos);
switch (size) {
case 1 : *data = READ_REG8 (data_reg + (pos & 3 )); break ;
case 2 : *data = READ_REG16(data_reg + (pos & 2 )); break ;
case 4 : *data = READ_REG32(data_reg); break ;
}
DBG_CFG("%s(%x+%2x) -> 0x%x (c)\n" , __func__, tok, pos, *data);
return 0 ;
}
static void
lba_wr_cfg(struct lba_device *d, u32 tok, u8 reg, u32 data, u32 size)
{
int error __maybe_unused = 0 ;
u32 arb_mask = 0 ;
u32 error_config = 0 ;
u32 status_control = 0 ;
void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
LBA_CFG_SETUP(d, tok);
LBA_CFG_ADDR_SETUP(d, tok | reg);
switch (size) {
case 1 : WRITE_REG8 (data, data_reg + (reg & 3 )); break ;
case 2 : WRITE_REG16(data, data_reg + (reg & 2 )); break ;
case 4 : WRITE_REG32(data, data_reg); break ;
}
LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error);
LBA_CFG_RESTORE(d, d->hba.base_addr);
}
/*
* LBA 4 . 0 config write code implements non - postable semantics
* by doing a read of CONFIG ADDR after the write .
*/
static int elroy_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
{
struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
u32 tok = LBA_CFG_TOK(local_bus,devfn);
if ((pos > 255 ) || (devfn > 255 ))
return -EINVAL;
if (!LBA_SKIP_PROBE(d)) {
/* Original Workaround */
lba_wr_cfg(d, tok, pos, (u32) data, size);
DBG_CFG("%s(%x+%2x) = 0x%x (a)\n" , __func__, tok, pos,data);
return 0 ;
}
if (LBA_SKIP_PROBE(d) && (!lba_device_present(bus->busn_res.start, devfn, d))) {
DBG_CFG("%s(%x+%2x) = 0x%x (b)\n" , __func__, tok, pos,data);
return 1 ; /* New Workaround */
}
DBG_CFG("%s(%x+%2x) = 0x%x (c)\n" , __func__, tok, pos, data);
/* Basic Algorithm */
LBA_CFG_ADDR_SETUP(d, tok | pos);
switch (size) {
case 1 : WRITE_REG8 (data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 3 ));
break ;
case 2 : WRITE_REG16(data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 2 ));
break ;
case 4 : WRITE_REG32(data, d->hba.base_addr + LBA_PCI_CFG_DATA);
break ;
}
/* flush posted write */
lba_t32 = READ_REG32(d->hba.base_addr + LBA_PCI_CFG_ADDR);
return 0 ;
}
static struct pci_ops elroy_cfg_ops = {
.read = elroy_cfg_read,
.write = elroy_cfg_write,
};
/*
* The mercury_cfg_ops are slightly misnamed ; they ' re also used for Elroy
* TR4 . 0 as no additional bugs were found in this areea between Elroy and
* Mercury
*/
static int mercury_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
{
struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
u32 tok = LBA_CFG_TOK(local_bus, devfn);
void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
if ((pos > 255 ) || (devfn > 255 ))
return -EINVAL;
LBA_CFG_TR4_ADDR_SETUP(d, tok | pos);
switch (size) {
case 1 :
*data = READ_REG8(data_reg + (pos & 3 ));
break ;
case 2 :
*data = READ_REG16(data_reg + (pos & 2 ));
break ;
case 4 :
*data = READ_REG32(data_reg); break ;
break ;
}
DBG_CFG("mercury_cfg_read(%x+%2x) -> 0x%x\n" , tok, pos, *data);
return 0 ;
}
/*
* LBA 4 . 0 config write code implements non - postable semantics
* by doing a read of CONFIG ADDR after the write .
*/
static int mercury_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
{
struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
u32 tok = LBA_CFG_TOK(local_bus,devfn);
if ((pos > 255 ) || (devfn > 255 ))
return -EINVAL;
DBG_CFG("%s(%x+%2x) <- 0x%x (c)\n" , __func__, tok, pos, data);
LBA_CFG_TR4_ADDR_SETUP(d, tok | pos);
switch (size) {
case 1 :
WRITE_REG8 (data, data_reg + (pos & 3 ));
break ;
case 2 :
WRITE_REG16(data, data_reg + (pos & 2 ));
break ;
case 4 :
WRITE_REG32(data, data_reg);
break ;
}
/* flush posted write */
lba_t32 = READ_U32(d->hba.base_addr + LBA_PCI_CFG_ADDR);
return 0 ;
}
static struct pci_ops mercury_cfg_ops = {
.read = mercury_cfg_read,
.write = mercury_cfg_write,
};
static void
lba_bios_init(void )
{
DBG(MODULE_NAME ": lba_bios_init\n" );
}
#ifdef CONFIG_64BIT
/*
* truncate_pat_collision : Deal with overlaps or outright collisions
* between PAT PDC reported ranges .
*
* Broken PA8800 firmware will report lmmio range that
* overlaps with CPU HPA . Just truncate the lmmio range .
*
* BEWARE : conflicts with this lmmio range may be an
* elmmio range which is pointing down another rope .
*
* FIXME : only deals with one collision per range . . . theoretically we
* could have several . Supporting more than one collision will get messy .
*/
static unsigned long
truncate_pat_collision(struct resource *root, struct resource *new )
{
unsigned long start = new ->start;
unsigned long end = new ->end;
struct resource *tmp = root->child;
if (end <= start || start < root->start || !tmp)
return 0 ;
/* find first overlap */
while (tmp && tmp->end < start)
tmp = tmp->sibling;
/* no entries overlap */
if (!tmp) return 0 ;
/* found one that starts behind the new one
* * Don ' t need to do anything .
*/
if (tmp->start >= end) return 0 ;
if (tmp->start <= start) {
/* "front" of new one overlaps */
new ->start = tmp->end + 1 ;
if (tmp->end >= end) {
/* AACCKK! totally overlaps! drop this range. */
return 1 ;
}
}
if (tmp->end < end ) {
/* "end" of new one overlaps */
new ->end = tmp->start - 1 ;
}
printk(KERN_WARNING "LBA: Truncating lmmio_space [%lx/%lx] "
"to [%lx,%lx]\n" ,
start, end,
(long )new ->start, (long )new ->end );
return 0 ; /* truncation successful */
}
/*
* extend_lmmio_len : extend lmmio range to maximum length
*
* This is needed at least on C8000 systems to get the ATI FireGL card
* working . On other systems we will currently not extend the lmmio space .
*/
static unsigned long
extend_lmmio_len(unsigned long start, unsigned long end, unsigned long lba_len)
{
struct resource *tmp;
/* exit if not a C8000 */
if (boot_cpu_data.cpu_type < mako)
return end;
pr_debug("LMMIO mismatch: PAT length = 0x%lx, MASK register = 0x%lx\n" ,
end - start, lba_len);
lba_len = min(lba_len+1 , 256 UL*1024 *1024 ); /* limit to 256 MB */
pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - original\n" , start, end);
end += lba_len;
if (end < start) /* fix overflow */
end = -1 ULL;
pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - current\n" , start, end);
/* first overlap */
for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
pr_debug("LBA: testing %pR\n" , tmp);
if (tmp->start == start)
continue ; /* ignore ourself */
if (tmp->end < start)
continue ;
if (tmp->start > end)
continue ;
if (end >= tmp->start)
end = tmp->start - 1 ;
}
pr_info("LBA: lmmio_space [0x%lx-0x%lx] - new\n" , start, end);
/* return new end */
return end;
}
#else
#define truncate_pat_collision(r,n) (0 )
#endif
static void pcibios_allocate_bridge_resources(struct pci_dev *dev)
{
int idx;
struct resource *r;
for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
r = &dev->resource[idx];
if (!r->flags)
continue ;
if (r->parent) /* Already allocated */
continue ;
if (!r->start || pci_claim_bridge_resource(dev, idx) < 0 ) {
/*
* Something is wrong with the region .
* Invalidate the resource to prevent
* child resource allocations in this
* range .
*/
r->start = r->end = 0 ;
r->flags = 0 ;
}
}
}
static void pcibios_allocate_bus_resources(struct pci_bus *bus)
{
struct pci_bus *child;
/* Depth-First Search on bus tree */
if (bus->self)
pcibios_allocate_bridge_resources(bus->self);
list_for_each_entry(child, &bus->children, node)
pcibios_allocate_bus_resources(child);
}
/*
* * The algorithm is generic code .
* * But it needs to access local data structures to get the IRQ base .
* * Could make this a " pci_fixup_irq ( bus , region ) " but not sure
* * it ' s worth it .
* *
* * Called by do_pci_scan_bus ( ) immediately after each PCI bus is walked .
* * Resources aren ' t allocated until recursive buswalk below HBA is completed .
*/
static void
lba_fixup_bus(struct pci_bus *bus)
{
struct pci_dev *dev;
#ifdef FBB_SUPPORT
u16 status;
#endif
struct lba_device *ldev = LBA_DEV(parisc_walk_tree(bus->bridge));
DBG("lba_fixup_bus(0x%p) bus %d platform_data 0x%p\n" ,
bus, (int )bus->busn_res.start, bus->bridge->platform_data);
/*
* * Properly Setup MMIO resources for this bus .
* * pci_alloc_primary_bus ( ) mangles this .
*/
if (bus->parent) {
/* PCI-PCI Bridge */
pci_read_bridge_bases(bus);
/* check and allocate bridge resources */
pcibios_allocate_bus_resources(bus);
} else {
/* Host-PCI Bridge */
int err;
DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n" ,
ldev->hba.io_space.name,
ldev->hba.io_space.start, ldev->hba.io_space.end,
ldev->hba.io_space.flags);
DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n" ,
ldev->hba.lmmio_space.name,
ldev->hba.lmmio_space.start, ldev->hba.lmmio_space.end,
ldev->hba.lmmio_space.flags);
err = request_resource(&ioport_resource, &(ldev->hba.io_space));
if (err < 0 ) {
lba_dump_res(&ioport_resource, 2 );
BUG();
}
if (ldev->hba.elmmio_space.flags) {
err = request_resource(&iomem_resource,
&(ldev->hba.elmmio_space));
if (err < 0 ) {
printk("FAILED: lba_fixup_bus() request for "
"elmmio_space [%lx/%lx]\n" ,
(long )ldev->hba.elmmio_space.start,
(long )ldev->hba.elmmio_space.end);
/* lba_dump_res(&iomem_resource, 2); */
/* BUG(); */
}
}
if (ldev->hba.lmmio_space.flags) {
err = request_resource(&iomem_resource, &(ldev->hba.lmmio_space));
if (err < 0 ) {
printk(KERN_ERR "FAILED: lba_fixup_bus() request for "
"lmmio_space [%lx/%lx]\n" ,
(long )ldev->hba.lmmio_space.start,
(long )ldev->hba.lmmio_space.end);
}
}
#ifdef CONFIG_64BIT
/* GMMIO is distributed range. Every LBA/Rope gets part it. */
if (ldev->hba.gmmio_space.flags) {
err = request_resource(&iomem_resource, &(ldev->hba.gmmio_space));
if (err < 0 ) {
printk("FAILED: lba_fixup_bus() request for "
"gmmio_space [%lx/%lx]\n" ,
(long )ldev->hba.gmmio_space.start,
(long )ldev->hba.gmmio_space.end);
lba_dump_res(&iomem_resource, 2 );
BUG();
}
}
#endif
}
list_for_each_entry(dev, &bus->devices, bus_list) {
int i;
DBG("lba_fixup_bus() %s\n" , pci_name(dev));
/* Virtualize Device/Bridge Resources. */
for (i = 0 ; i < PCI_BRIDGE_RESOURCES; i++) {
struct resource *res = &dev->resource[i];
/* If resource not allocated - skip it */
if (!res->start)
continue ;
/*
* * FIXME : this will result in whinging for devices
* * that share expansion ROMs ( think quad tulip ) , but
* * isn ' t harmful .
*/
pci_claim_resource(dev, i);
}
#ifdef FBB_SUPPORT
/*
* * If one device does not support FBB transfers ,
* * No one on the bus can be allowed to use them .
*/
(void ) pci_read_config_word(dev, PCI_STATUS, &status);
bus->bridge_ctl &= ~(status & PCI_STATUS_FAST_BACK);
#endif
/*
* * P2PB ' s have no IRQs . ignore them .
*/
if ((dev->class >> 8 ) == PCI_CLASS_BRIDGE_PCI) {
pcibios_init_bridge(dev);
continue ;
}
/* Adjust INTERRUPT_LINE for this dev */
iosapic_fixup_irq(ldev->iosapic_obj, dev);
}
#ifdef FBB_SUPPORT
/* FIXME/REVISIT - finish figuring out to set FBB on both
* * pci_setup_bridge ( ) clobbers PCI_BRIDGE_CONTROL .
* * Can ' t fixup here anyway . . . . garr . . .
*/
if (fbb_enable) {
if (bus->parent) {
u8 control;
/* enable on PPB */
(void ) pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &control);
(void ) pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, control | PCI_STATUS_FAST_BACK);
} else {
/* enable on LBA */
}
fbb_enable = PCI_COMMAND_FAST_BACK;
}
/* Lastly enable FBB/PERR/SERR on all devices too */
list_for_each_entry(dev, &bus->devices, bus_list) {
(void ) pci_read_config_word(dev, PCI_COMMAND, &status);
status |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR | fbb_enable;
(void ) pci_write_config_word(dev, PCI_COMMAND, status);
}
#endif
}
static struct pci_bios_ops lba_bios_ops = {
.init = lba_bios_init,
.fixup_bus = lba_fixup_bus,
};
/*******************************************************
* *
* * LBA Sprockets " I / O Port " Space Accessor Functions
* *
* * This set of accessor functions is intended for use with
* * " legacy firmware " ( ie Sprockets on Allegro / Forte boxes ) .
* *
* * Many PCI devices don ' t require use of I / O port space ( eg Tulip ,
* * NCR720 ) since they export the same registers to both MMIO and
* * I / O port space . In general I / O port space is slower than
* * MMIO since drivers are designed so PIO writes can be posted .
* *
********************************************************/
#define LBA_PORT_IN(size, mask) \
static u## size lba_astro_in## size (struct pci_hba_data *d, u16 addr) \
{ \
u## size t; \
t = READ_REG## size(astro_iop_base + addr); \
DBG_PORT(" 0x%x\n" , t); \
return (t); \
}
LBA_PORT_IN( 8 , 3 )
LBA_PORT_IN(16 , 2 )
LBA_PORT_IN(32 , 0 )
/*
* * BUG X4107 : Ordering broken - DMA RD return can bypass PIO WR
* *
* * Fixed in Elroy 2 . 2 . The READ_U32 ( . . . , LBA_FUNC_ID ) below is
* * guarantee non - postable completion semantics - not avoid X4107 .
* * The READ_U32 only guarantees the write data gets to elroy but
* * out to the PCI bus . We can ' t read stuff from I / O port space
* * since we don ' t know what has side - effects . Attempting to read
* * from configuration space would be suicidal given the number of
* * bugs in that elroy functionality .
* *
* * Description :
* * DMA read results can improperly pass PIO writes ( X4107 ) . The
* * result of this bug is that if a processor modifies a location in
* * memory after having issued PIO writes , the PIO writes are not
* * guaranteed to be completed before a PCI device is allowed to see
* * the modified data in a DMA read .
* *
* * Note that IKE bug X3719 in TR1 IKEs will result in the same
* * symptom .
* *
* * Workaround :
* * The workaround for this bug is to always follow a PIO write with
* * a PIO read to the same bus before starting DMA on that PCI bus .
* *
*/
#define LBA_PORT_OUT(size, mask) \
static void lba_astro_out## size (struct pci_hba_data *d, u16 addr, u## size val) \
{ \
DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n" , __func__, d, addr, val); \
WRITE_REG## size(val, astro_iop_base + addr); \
if (LBA_DEV(d)->hw_rev < 3 ) \
lba_t32 = READ_U32(d->base_addr + LBA_FUNC_ID); \
}
LBA_PORT_OUT( 8 , 3 )
LBA_PORT_OUT(16 , 2 )
LBA_PORT_OUT(32 , 0 )
static struct pci_port_ops lba_astro_port_ops = {
.inb = lba_astro_in8,
.inw = lba_astro_in16,
.inl = lba_astro_in32,
.outb = lba_astro_out8,
.outw = lba_astro_out16,
.outl = lba_astro_out32
};
#ifdef CONFIG_64BIT
#define PIOP_TO_GMMIO(lba, addr) \
((lba)->iop_base + (((addr)&0 xFFFC)<<10 ) + ((addr)&3 ))
/*******************************************************
* *
* * LBA PAT " I / O Port " Space Accessor Functions
* *
* * This set of accessor functions is intended for use with
* * " PAT PDC " firmware ( ie Prelude / Rhapsody / Piranha boxes ) .
* *
* * This uses the PIOP space located in the first 64 MB of GMMIO .
* * Each rope gets a full 64 * KB * ( ie 4 bytes per page ) this way .
* * bits 1 : 0 stay the same . bits 15 : 2 become 25 : 12 .
* * Then add the base and we can generate an I / O Port cycle .
********************************************************/
#undef LBA_PORT_IN
#define LBA_PORT_IN(size, mask) \
static u## size lba_pat_in## size (struct pci_hba_data *l, u16 addr) \
{ \
u## size t; \
DBG_PORT("%s(0x%p, 0x%x) ->" , __func__, l, addr); \
t = READ_REG## size(PIOP_TO_GMMIO(LBA_DEV(l), addr)); \
DBG_PORT(" 0x%x\n" , t); \
return (t); \
}
LBA_PORT_IN( 8 , 3 )
LBA_PORT_IN(16 , 2 )
LBA_PORT_IN(32 , 0 )
#undef LBA_PORT_OUT
#define LBA_PORT_OUT(size, mask) \
static void lba_pat_out## size (struct pci_hba_data *l, u16 addr, u## size val) \
{ \
void __iomem *where = PIOP_TO_GMMIO(LBA_DEV(l), addr); \
DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n" , __func__, l, addr, val); \
WRITE_REG## size(val, where); \
/* flush the I/O down to the elroy at least */ \
lba_t32 = READ_U32(l->base_addr + LBA_FUNC_ID); \
}
LBA_PORT_OUT( 8 , 3 )
LBA_PORT_OUT(16 , 2 )
LBA_PORT_OUT(32 , 0 )
static struct pci_port_ops lba_pat_port_ops = {
.inb = lba_pat_in8,
.inw = lba_pat_in16,
.inl = lba_pat_in32,
.outb = lba_pat_out8,
.outw = lba_pat_out16,
.outl = lba_pat_out32
};
/*
* * make range information from PDC available to PCI subsystem .
* * We make the PDC call here in order to get the PCI bus range
* * numbers . The rest will get forwarded in pcibios_fixup_bus ( ) .
* * We don ' t have a struct pci_bus assigned to us yet .
*/
static void
lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
{
unsigned long bytecnt;
long io_count __maybe_unused;
long status; /* PDC return status */
long pa_count;
pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; /* PA_VIEW */
pdc_pat_cell_mod_maddr_block_t *io_pdc_cell; /* IO_VIEW */
int i;
pa_pdc_cell = kzalloc(sizeof (pdc_pat_cell_mod_maddr_block_t), GFP_KERNEL);
if (!pa_pdc_cell)
return ;
io_pdc_cell = kzalloc(sizeof (pdc_pat_cell_mod_maddr_block_t), GFP_KERNEL);
if (!io_pdc_cell) {
kfree(pa_pdc_cell);
return ;
}
/* return cell module (IO view) */
status = pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index,
PA_VIEW, pa_pdc_cell);
pa_count = pa_pdc_cell->mod[1 ];
status |= pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index,
IO_VIEW, io_pdc_cell);
io_count = io_pdc_cell->mod[1 ];
/* We've already done this once for device discovery...*/
if (status != PDC_OK) {
panic("pdc_pat_cell_module() call failed for LBA!\n" );
}
if (PAT_GET_ENTITY(pa_pdc_cell->mod_info) != PAT_ENTITY_LBA) {
panic("pdc_pat_cell_module() entity returned != PAT_ENTITY_LBA!\n" );
}
/*
* * Inspect the resources PAT tells us about
*/
for (i = 0 ; i < pa_count; i++) {
struct {
unsigned long type;
unsigned long start;
unsigned long end; /* aka finish */
} *p, *io;
struct resource *r;
p = (void *) &(pa_pdc_cell->mod[2 +i*3 ]);
io = (void *) &(io_pdc_cell->mod[2 +i*3 ]);
/* Convert the PAT range data to PCI "struct resource" */
switch (p->type & 0 xff) {
case PAT_PBNUM:
lba_dev->hba.bus_num.start = p->start;
lba_dev->hba.bus_num.end = p->end;
lba_dev->hba.bus_num.flags = IORESOURCE_BUS;
break ;
case PAT_LMMIO:
/* used to fix up pre-initialized MEM BARs */
if (!lba_dev->hba.lmmio_space.flags) {
unsigned long lba_len;
lba_len = ~READ_REG32(lba_dev->hba.base_addr
+ LBA_LMMIO_MASK);
if ((p->end - p->start) != lba_len)
p->end = extend_lmmio_len(p->start,
p->end, lba_len);
sprintf(lba_dev->hba.lmmio_name,
"PCI%02x LMMIO" ,
(int )lba_dev->hba.bus_num.start);
lba_dev->hba.lmmio_space_offset = p->start -
io->start;
r = &lba_dev->hba.lmmio_space;
r->name = lba_dev->hba.lmmio_name;
} else if (!lba_dev->hba.elmmio_space.flags) {
sprintf(lba_dev->hba.elmmio_name,
"PCI%02x ELMMIO" ,
(int )lba_dev->hba.bus_num.start);
r = &lba_dev->hba.elmmio_space;
r->name = lba_dev->hba.elmmio_name;
} else {
printk(KERN_WARNING MODULE_NAME
" only supports 2 LMMIO resources!\n" );
break ;
}
r->start = p->start;
r->end = p->end;
r->flags = IORESOURCE_MEM;
r->parent = r->sibling = r->child = NULL;
break ;
case PAT_GMMIO:
/* MMIO space > 4GB phys addr; for 64-bit BAR */
sprintf(lba_dev->hba.gmmio_name, "PCI%02x GMMIO" ,
(int )lba_dev->hba.bus_num.start);
r = &lba_dev->hba.gmmio_space;
r->name = lba_dev->hba.gmmio_name;
r->start = p->start;
r->end = p->end;
r->flags = IORESOURCE_MEM;
r->parent = r->sibling = r->child = NULL;
break ;
case PAT_NPIOP:
printk(KERN_WARNING MODULE_NAME
" range[%d] : ignoring NPIOP (0x%lx)\n" ,
i, p->start);
break ;
case PAT_PIOP:
/*
* * Postable I / O port space is per PCI host adapter .
* * base of 64 MB PIOP region
*/
lba_dev->iop_base = ioremap(p->start, 64 * 1024 * 1024 );
sprintf(lba_dev->hba.io_name, "PCI%02x Ports" ,
(int )lba_dev->hba.bus_num.start);
r = &lba_dev->hba.io_space;
r->name = lba_dev->hba.io_name;
r->start = HBA_PORT_BASE(lba_dev->hba.hba_num);
r->end = r->start + HBA_PORT_SPACE_SIZE - 1 ;
r->flags = IORESOURCE_IO;
r->parent = r->sibling = r->child = NULL;
break ;
default :
printk(KERN_WARNING MODULE_NAME
" range[%d] : unknown pat range type (0x%lx)\n" ,
i, p->type & 0 xff);
break ;
}
}
kfree(pa_pdc_cell);
kfree(io_pdc_cell);
}
#else
/* keep compiler from complaining about missing declarations */
#define lba_pat_port_ops lba_astro_port_ops
#define lba_pat_resources(pa_dev, lba_dev)
#endif /* CONFIG_64BIT */
static void
lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
{
struct resource *r;
int lba_num;
lba_dev->hba.lmmio_space_offset = PCI_F_EXTEND;
/*
* * With " legacy " firmware , the lowest byte of FW_SCRATCH
* * represents bus - > secondary and the second byte represents
* * bus - > subsidiary ( i . e . highest PPB programmed by firmware ) .
* * PCI bus walk * should * end up with the same result .
* * FIXME : But we don ' t have sanity checks in PCI or LBA .
*/
lba_num = READ_REG32(lba_dev->hba.base_addr + LBA_FW_SCRATCH);
r = &(lba_dev->hba.bus_num);
r->name = "LBA PCI Busses" ;
r->start = lba_num & 0 xff;
r->end = (lba_num>>8 ) & 0 xff;
r->flags = IORESOURCE_BUS;
/* Set up local PCI Bus resources - we don't need them for
* * Legacy boxes but it ' s nice to see in / proc / iomem .
*/
r = &(lba_dev->hba.lmmio_space);
sprintf(lba_dev->hba.lmmio_name, "PCI%02x LMMIO" ,
(int )lba_dev->hba.bus_num.start);
r->name = lba_dev->hba.lmmio_name;
#if 1
/* We want the CPU -> IO routing of addresses.
* The SBA BASE / MASK registers control CPU - > IO routing .
* Ask SBA what is routed to this rope / LBA .
*/
sba_distributed_lmmio(pa_dev, r);
#else
/*
* The LBA BASE / MASK registers control IO - > System routing .
*
* The following code works but doesn ' t get us what we want .
* Well , only because firmware ( v5 . 0 ) on C3000 doesn ' t program
* the LBA BASE / MASE registers to be the exact inverse of
* the corresponding SBA registers . Other Astro / Pluto
* based platform firmware may do it right .
*
* Should someone want to mess with MSI , they may need to
* reprogram LBA BASE / MASK registers . Thus preserve the code
* below until MSI is known to work on C3000 / A500 / N4000 / RP3440 .
*
* Using the code below , / proc / iomem shows :
* . . .
* f0000000 - f0ffffff : PCI00 LMMIO
* f05d0000 - f05d0000 : lcd_data
* f05d0008 - f05d0008 : lcd_cmd
* f1000000 - f1ffffff : PCI01 LMMIO
* f4000000 - f4ffffff : PCI02 LMMIO
* f4000000 - f4001fff : sym53c8xx
* f4002000 - f4003fff : sym53c8xx
* f4004000 - f40043ff : sym53c8xx
* f4005000 - f40053ff : sym53c8xx
* f4007000 - f4007fff : ohci_hcd
* f4008000 - f40083ff : tulip
* f6000000 - f6ffffff : PCI03 LMMIO
* f8000000 - fbffffff : PCI00 ELMMIO
* fa100000 - fa4fffff : stifb mmio
* fb000000 - fb1fffff : stifb fb
*
* But everything listed under PCI02 actually lives under PCI00 .
* This is clearly wrong .
*
* Asking SBA how things are routed tells the correct story :
* LMMIO_BASE / MASK / ROUTE f4000001 fc000000 00000000
* DIR0_BASE / MASK / ROUTE fa000001 fe000000 00000006
* DIR1_BASE / MASK / ROUTE f9000001 ff000000 00000004
* DIR2_BASE / MASK / ROUTE f0000000 fc000000 00000000
* DIR3_BASE / MASK / ROUTE f0000000 fc000000 00000000
*
* Which looks like this in / proc / iomem :
* f4000000 - f47fffff : PCI00 LMMIO
* f4000000 - f4001fff : sym53c8xx
* . . . [ deteled core devices - same as above ] . . .
* f4008000 - f40083ff : tulip
* f4800000 - f4ffffff : PCI01 LMMIO
* f6000000 - f67fffff : PCI02 LMMIO
* f7000000 - f77fffff : PCI03 LMMIO
* f9000000 - f9ffffff : PCI02 ELMMIO
* fa000000 - fbffffff : PCI03 ELMMIO
* fa100000 - fa4fffff : stifb mmio
* fb000000 - fb1fffff : stifb fb
*
* ie all Built - in core are under now correctly under PCI00 .
* The " PCI02 ELMMIO " directed range is for :
* + - [ 02 ] - - - 03 . 0 3 Dfx Interactive , Inc . Voodoo 2
*
* All is well now .
*/
r->start = READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_BASE);
if (r->start & 1 ) {
unsigned long rsize;
r->flags = IORESOURCE_MEM;
/* mmio_mask also clears Enable bit */
r->start &= mmio_mask;
r->start = PCI_HOST_ADDR(&lba_dev->hba, r->start);
rsize = ~ READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_MASK);
/*
* * Each rope only gets part of the distributed range .
* * Adjust " window " for this rope .
*/
rsize /= ROPES_PER_IOC;
r->start += (rsize + 1 ) * LBA_NUM(pa_dev->hpa.start);
r->end = r->start + rsize;
} else {
r->end = r->start = 0 ; /* Not enabled. */
}
#endif
/*
* * " Directed " ranges are used when the " distributed range " isn ' t
* * sufficient for all devices below a given LBA . Typically devices
* * like graphics cards or X25 may need a directed range when the
* * bus has multiple slots ( ie multiple devices ) or the device
* * needs more than the typical 4 or 8 MB a distributed range offers .
* *
* * The main reason for ignoring it now frigging complications .
* * Directed ranges may overlap ( and have precedence ) over
* * distributed ranges . Or a distributed range assigned to a unused
* * rope may be used by a directed range on a different rope .
* * Support for graphics devices may require fixing this
* * since they may be assigned a directed range which overlaps
* * an existing ( but unused portion of ) distributed range .
*/
r = &(lba_dev->hba.elmmio_space);
sprintf(lba_dev->hba.elmmio_name, "PCI%02x ELMMIO" ,
(int )lba_dev->hba.bus_num.start);
r->name = lba_dev->hba.elmmio_name;
#if 1
/* See comment which precedes call to sba_directed_lmmio() */
sba_directed_lmmio(pa_dev, r);
#else
r->start = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_BASE);
if (r->start & 1 ) {
unsigned long rsize;
r->flags = IORESOURCE_MEM;
/* mmio_mask also clears Enable bit */
r->start &= mmio_mask;
r->start = PCI_HOST_ADDR(&lba_dev->hba, r->start);
rsize = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_MASK);
r->end = r->start + ~rsize;
}
#endif
r = &(lba_dev->hba.io_space);
sprintf(lba_dev->hba.io_name, "PCI%02x Ports" ,
(int )lba_dev->hba.bus_num.start);
r->name = lba_dev->hba.io_name;
r->flags = IORESOURCE_IO;
r->start = READ_REG32(lba_dev->hba.base_addr + LBA_IOS_BASE) & ~1 L;
r->end = r->start + (READ_REG32(lba_dev->hba.base_addr + LBA_IOS_MASK) ^ (HBA_PORT_SPACE_SIZE - 1 ));
/* Virtualize the I/O Port space ranges */
lba_num = HBA_PORT_BASE(lba_dev->hba.hba_num);
r->start |= lba_num;
r->end |= lba_num;
}
/**************************************************************************
* *
* * LBA initialization code ( HW and SW )
* *
* * o identify LBA chip itself
* * o initialize LBA chip modes ( HardFail )
* * o FIXME : initialize DMA hints for reasonable defaults
* * o enable configuration functions
* * o call pci_register_ops ( ) to discover devs ( fixup / fixup_bus get invoked )
* *
**************************************************************************/
static int __init
lba_hw_init(struct lba_device *d)
{
u32 stat;
u32 bus_reset; /* PDC_PAT_BUG */
#if 0
printk(KERN_DEBUG "LBA %lx STAT_CTL %Lx ERROR_CFG %Lx STATUS %Lx DMA_CTL %Lx\n" ,
d->hba.base_addr,
READ_REG64(d->hba.base_addr + LBA_STAT_CTL),
READ_REG64(d->hba.base_addr + LBA_ERROR_CONFIG),
READ_REG64(d->hba.base_addr + LBA_ERROR_STATUS),
READ_REG64(d->hba.base_addr + LBA_DMA_CTL) );
printk(KERN_DEBUG " ARB mask %Lx pri %Lx mode %Lx mtlt %Lx\n" ,
READ_REG64(d->hba.base_addr + LBA_ARB_MASK),
READ_REG64(d->hba.base_addr + LBA_ARB_PRI),
READ_REG64(d->hba.base_addr + LBA_ARB_MODE),
READ_REG64(d->hba.base_addr + LBA_ARB_MTLT) );
printk(KERN_DEBUG " HINT cfg 0x%Lx\n" ,
READ_REG64(d->hba.base_addr + LBA_HINT_CFG));
printk(KERN_DEBUG " HINT reg " );
{ int i;
for (i=LBA_HINT_BASE; i< (14 *8 + LBA_HINT_BASE); i+=8 )
printk(" %Lx" , READ_REG64(d->hba.base_addr + i));
}
printk("\n" );
#endif /* DEBUG_LBA_PAT */
#ifdef CONFIG_64BIT
/*
* FIXME add support for PDC_PAT_IO " Get slot status " - OLAR support
* Only N - Class and up can really make use of Get slot status .
* maybe L - class too but I ' ve never played with it there .
*/
#endif
/* PDC_PAT_BUG: exhibited in rev 40.48 on L2000 */
bus_reset = READ_REG32(d->hba.base_addr + LBA_STAT_CTL + 4 ) & 1 ;
if (bus_reset) {
printk(KERN_DEBUG "NOTICE: PCI bus reset still asserted! (clearing)\n" );
}
stat = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG);
if (stat & LBA_SMART_MODE) {
printk(KERN_DEBUG "NOTICE: LBA in SMART mode! (cleared)\n" );
stat &= ~LBA_SMART_MODE;
WRITE_REG32(stat, d->hba.base_addr + LBA_ERROR_CONFIG);
}
/*
* Hard Fail vs . Soft Fail on PCI " Master Abort " .
*
* " Master Abort " means the MMIO transaction timed out - usually due to
* the device not responding to an MMIO read . We would like HF to be
* enabled to find driver problems , though it means the system will
* crash with a HPMC .
*
* In SoftFail mode " ~ 0 L " is returned as a result of a timeout on the
* pci bus . This is like how PCI busses on x86 and most other
* architectures behave . In order to increase compatibility with
* existing ( x86 ) PCI hardware and existing Linux drivers we enable
* Soft Faul mode on PA - RISC now too .
*/
stat = READ_REG32(d->hba.base_addr + LBA_STAT_CTL);
#if defined (ENABLE_HARDFAIL)
WRITE_REG32(stat | HF_ENABLE, d->hba.base_addr + LBA_STAT_CTL);
#else
WRITE_REG32(stat & ~HF_ENABLE, d->hba.base_addr + LBA_STAT_CTL);
#endif
/*
* * Writing a zero to STAT_CTL . rf ( bit 0 ) will clear reset signal
* * if it ' s not already set . If we just cleared the PCI Bus Reset
* * signal , wait a bit for the PCI devices to recover and setup .
*/
if (bus_reset)
mdelay(pci_post_reset_delay);
if (0 == READ_REG32(d->hba.base_addr + LBA_ARB_MASK)) {
/*
* * PDC_PAT_BUG : PDC rev 40 . 48 on L2000 .
* * B2000 / C3600 / J6000 also have this problem ?
* *
* * Elroys with hot pluggable slots don ' t get configured
* * correctly if the slot is empty . ARB_MASK is set to 0
* * and we can ' t master transactions on the bus if it ' s
* * not at least one . 0 x3 enables elroy and first slot .
*/
printk(KERN_DEBUG "NOTICE: Enabling PCI Arbitration\n" );
WRITE_REG32(0 x3, d->hba.base_addr + LBA_ARB_MASK);
}
/*
* * FIXME : Hint registers are programmed with default hint
* * values by firmware . Hints should be sane even if we
* * can ' t reprogram them the way drivers want .
*/
return 0 ;
}
/*
* Unfortunately , when firmware numbers busses , it doesn ' t take into account
* Cardbus bridges . So we have to renumber the busses to suit ourselves .
* Elroy / Mercury don ' t actually know what bus number they ' re attached to ;
* we use bus 0 to indicate the directly attached bus and any other bus
* number will be taken care of by the PCI - PCI bridge .
*/
static unsigned int lba_next_bus = 0 ;
/*
* Determine if lba should claim this chip ( return 0 ) or not ( return 1 ) .
* If so , initialize the chip and tell other partners in crime they
* have work to do .
*/
static int __init
lba_driver_probe(struct parisc_device *dev)
{
struct lba_device *lba_dev;
LIST_HEAD(resources);
struct pci_bus *lba_bus;
struct pci_ops *cfg_ops;
u32 func_class;
void *tmp_obj;
char *version;
void __iomem *addr;
int max;
addr = ioremap(dev->hpa.start, 4096 );
if (addr == NULL)
return -ENOMEM;
/* Read HW Rev First */
func_class = READ_REG32(addr + LBA_FCLASS);
if (IS_ELROY(dev)) {
func_class &= 0 xf;
switch (func_class) {
case 0 : version = "TR1.0" ; break ;
case 1 : version = "TR2.0" ; break ;
case 2 : version = "TR2.1" ; break ;
case 3 : version = "TR2.2" ; break ;
case 4 : version = "TR3.0" ; break ;
case 5 : version = "TR4.0" ; break ;
default : version = "TR4+" ;
}
printk(KERN_INFO "Elroy version %s (0x%x) found at 0x%lx\n" ,
version, func_class & 0 xf, (long )dev->hpa.start);
if (func_class < 2 ) {
printk(KERN_WARNING "Can't support LBA older than "
"TR2.1 - continuing under adversity.\n" );
}
#if 0
/* Elroy TR4.0 should work with simple algorithm.
But it doesn ' t . Still missing something . * sigh *
*/
if (func_class > 4 ) {
cfg_ops = &mercury_cfg_ops;
} else
#endif
{
cfg_ops = &elroy_cfg_ops;
}
} else if (IS_MERCURY(dev) || IS_QUICKSILVER(dev)) {
int major, minor;
func_class &= 0 xff;
major = func_class >> 4 , minor = func_class & 0 xf;
/* We could use one printk for both Elroy and Mercury,
* but for the mask for func_class .
*/
printk(KERN_INFO "%s version TR%d.%d (0x%x) found at 0x%lx\n" ,
IS_MERCURY(dev) ? "Mercury" : "Quicksilver" , major,
minor, func_class, (long )dev->hpa.start);
cfg_ops = &mercury_cfg_ops;
} else {
printk(KERN_ERR "Unknown LBA found at 0x%lx\n" ,
(long )dev->hpa.start);
return -ENODEV;
}
/* Tell I/O SAPIC driver we have a IRQ handler/region. */
tmp_obj = iosapic_register(dev->hpa.start + LBA_IOSAPIC_BASE,
addr + LBA_IOSAPIC_BASE);
/* NOTE: PCI devices (e.g. 103c:1005 graphics card) which don't
* * have an IRT entry will get NULL back from iosapic code .
*/
lba_dev = kzalloc(sizeof (struct lba_device), GFP_KERNEL);
if (!lba_dev) {
printk(KERN_ERR "lba_init_chip - couldn't alloc lba_device\n" );
return (1 );
}
/* ---------- First : initialize data we already have --------- */
lba_dev->hw_rev = func_class;
lba_dev->hba.base_addr = addr;
lba_dev->hba.dev = dev;
lba_dev->iosapic_obj = tmp_obj; /* save interrupt handle */
lba_dev->hba.iommu = sba_get_iommu(dev); /* get iommu data */
parisc_set_drvdata(dev, lba_dev);
/* ------------ Second : initialize common stuff ---------- */
pci_bios = &lba_bios_ops;
pcibios_register_hba(&lba_dev->hba);
spin_lock_init(&lba_dev->lba_lock);
if (lba_hw_init(lba_dev))
return (1 );
/* ---------- Third : setup I/O Port and MMIO resources --------- */
if (is_pdc_pat()) {
/* PDC PAT firmware uses PIOP region of GMMIO space. */
pci_port = &lba_pat_port_ops;
/* Go ask PDC PAT what resources this LBA has */
lba_pat_resources(dev, lba_dev);
} else {
if (!astro_iop_base) {
/* Sprockets PDC uses NPIOP region */
astro_iop_base = ioremap(LBA_PORT_BASE, 64 * 1024 );
pci_port = &lba_astro_port_ops;
}
/* Poke the chip a bit for /proc output */
lba_legacy_resources(dev, lba_dev);
}
if (lba_dev->hba.bus_num.start < lba_next_bus)
lba_dev->hba.bus_num.start = lba_next_bus;
/* Overlaps with elmmio can (and should) fail here.
* We will prune ( or ignore ) the distributed range .
*
* FIXME : SBA code should register all elmmio ranges first .
* that would take care of elmmio ranges routed
* to a different rope ( already discovered ) from
* getting registered * after * LBA code has already
* registered it ' s distributed lmmio range .
*/
if (truncate_pat_collision(&iomem_resource,
&(lba_dev->hba.lmmio_space))) {
printk(KERN_WARNING "LBA: lmmio_space [%lx/%lx] duplicate!\n" ,
(long )lba_dev->hba.lmmio_space.start,
(long )lba_dev->hba.lmmio_space.end);
lba_dev->hba.lmmio_space.flags = 0 ;
}
pci_add_resource_offset(&resources, &lba_dev->hba.io_space,
HBA_PORT_BASE(lba_dev->hba.hba_num));
if (lba_dev->hba.elmmio_space.flags)
pci_add_resource_offset(&resources, &lba_dev->hba.elmmio_space,
lba_dev->hba.lmmio_space_offset);
if (lba_dev->hba.lmmio_space.flags)
pci_add_resource_offset(&resources, &lba_dev->hba.lmmio_space,
lba_dev->hba.lmmio_space_offset);
if (lba_dev->hba.gmmio_space.flags) {
/* Not registering GMMIO space - according to docs it's not
* even used on HP-UX. */
/* pci_add_resource(&resources, &lba_dev->hba.gmmio_space); */
}
pci_add_resource(&resources, &lba_dev->hba.bus_num);
dev->dev.platform_data = lba_dev;
lba_bus = lba_dev->hba.hba_bus =
pci_create_root_bus(&dev->dev, lba_dev->hba.bus_num.start,
cfg_ops, NULL, &resources);
if (!lba_bus) {
pci_free_resource_list(&resources);
return 0 ;
}
max = pci_scan_child_bus(lba_bus);
/* This is in lieu of calling pci_assign_unassigned_resources() */
if (is_pdc_pat()) {
/* assign resources to un-initialized devices */
DBG_PAT("LBA pci_bus_size_bridges()\n" );
pci_bus_size_bridges(lba_bus);
DBG_PAT("LBA pci_bus_assign_resources()\n" );
pci_bus_assign_resources(lba_bus);
#ifdef DEBUG_LBA_PAT
DBG_PAT("\nLBA PIOP resource tree\n" );
lba_dump_res(&lba_dev->hba.io_space, 2 );
DBG_PAT("\nLBA LMMIO resource tree\n" );
lba_dump_res(&lba_dev->hba.lmmio_space, 2 );
#endif
}
/*
* * Once PCI register ops has walked the bus , access to config
* * space is restricted . Avoids master aborts on config cycles .
* * Early LBA revs go fatal on * any * master abort .
*/
if (cfg_ops == &elroy_cfg_ops) {
lba_dev->flags |= LBA_FLAG_SKIP_PROBE;
}
lba_next_bus = max + 1 ;
pci_bus_add_devices(lba_bus);
/* Whew! Finally done! Tell services we got this one covered. */
return 0 ;
}
static const struct parisc_device_id lba_tbl[] __initconst = {
{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, ELROY_HVERS, 0 xa },
{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, MERCURY_HVERS, 0 xa },
{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, QUICKSILVER_HVERS, 0 xa },
{ 0 , }
};
static struct parisc_driver lba_driver __refdata = {
.name = MODULE_NAME,
.id_table = lba_tbl,
.probe = lba_driver_probe,
};
/*
* * One time initialization to let the world know the LBA was found .
* * Must be called exactly once before pci_init ( ) .
*/
static int __init lba_init(void )
{
return register_parisc_driver(&lba_driver);
}
arch_initcall(lba_init);
/*
* * Initialize the IBASE / IMASK registers for LBA ( Elroy ) .
* * Only called from sba_iommu . c in order to route ranges ( MMIO vs DMA ) .
* * sba_iommu is responsible for locking ( none needed at init time ) .
*/
void lba_set_iregs(struct parisc_device *lba, u32 ibase, u32 imask)
{
void __iomem * base_addr = ioremap(lba->hpa.start, 4096 );
imask <<= 2 ; /* adjust for hints - 2 more bits */
/* Make sure we aren't trying to set bits that aren't writeable. */
WARN_ON((ibase & 0 x001fffff) != 0 );
WARN_ON((imask & 0 x001fffff) != 0 );
DBG("%s() ibase 0x%x imask 0x%x\n" , __func__, ibase, imask);
WRITE_REG32( imask, base_addr + LBA_IMASK);
WRITE_REG32( ibase, base_addr + LBA_IBASE);
iounmap(base_addr);
}
/*
* The design of the Diva management card in rp34x0 machines ( rp3410 , rp3440 )
* seems rushed , so that many built - in components simply don ' t work .
* The following quirks disable the serial AUX port and the built - in ATI RV100
* Radeon 7000 graphics card which both don ' t have any external connectors and
* thus are useless , and even worse , e . g . the AUX port occupies ttyS0 and as
* such makes those machines the only PARISC machines on which we can ' t use
* ttyS0 as boot console .
*/
static void quirk_diva_ati_card(struct pci_dev *dev)
{
if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
dev->subsystem_device != 0 x1292)
return ;
dev_info(&dev->dev, "Hiding Diva built-in ATI card" );
dev->device = 0 ;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RADEON_QY,
quirk_diva_ati_card);
static void quirk_diva_aux_disable(struct pci_dev *dev)
{
if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
dev->subsystem_device != 0 x1291)
return ;
dev_info(&dev->dev, "Hiding Diva built-in AUX serial device" );
dev->device = 0 ;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA_AUX,
quirk_diva_aux_disable);
static void quirk_tosca_aux_disable(struct pci_dev *dev)
{
if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
dev->subsystem_device != 0 x104a)
return ;
dev_info(&dev->dev, "Hiding Tosca secondary built-in AUX serial device" );
dev->device = 0 ;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA,
quirk_tosca_aux_disable);
Messung V0.5 in Prozent C=92 H=94 G=92
¤ Dauer der Verarbeitung: 0.19 Sekunden
(vorverarbeitet am 2026-09-29)
¤
*© Formatika GbR, Deutschland
2026-10-10
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