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ALPHA: support graphics on non-zero PCI domains

Browse Source 
This code replaces earlier and incomplete handling of graphics on non-zero PCI
domains (aka hoses or peer PCI buses).

An option (CONFIG_VGA_HOSE) is set TRUE if configuring a GENERIC kernel, or a
kernel for MARVEL, TITAN, or TSUNAMI machines, as these are the machines whose
SRM consoles are capable of configuring and handling graphics options on
non-zero hoses.  All other machines have the option set FALSE.

A routine, "find_console_vga_hose()", is used to find the graphics device
which the machine's firmware believes is the console device, and it sets a
global (pci_vga_hose) for later use in managing access to the device.  This is
called in "init_arch" on TITAN and TSUNAMI machines; MARVEL machines use a
custom version of this routine because of extra complexity.

A routine, "locate_and_init_vga()", is used to find the graphics device and
set a global (pci_vga_hose) for later use in managing access to the device, in
the case where "find_console_vga_hose" has failed.

Various adjustments are made to the ioremap and ioportmap routines for
detecting and translating "legacy" VGA register and memory references to the
real PCI domain.

[akpm@linux-foundation.org: don't statically init bss]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Jay Estabrook <jay.estabrook@hp.com>
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jay Estabrook 2007-06-01 00:47:03 -07:00 committed by Linus Torvalds
parent 8778beb981
commit 025a22151c
12 changed files with 190 additions and 112 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/alpha/Kconfig
View File

@ -481,6 +481,15 @@ config ALPHA_BROKEN_IRQ_MASK
depends on ALPHA_GENERIC || ALPHA_PC164
default y
config VGA_HOSE
bool
depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI
default y
help
Support VGA on an arbitrary hose; needed for several platforms
which always have multiple hoses, and whose consoles support it.
config ALPHA_SRM
bool "Use SRM as bootloader" if ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS || ALPHA_NONAME
default y if ALPHA_JENSEN || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
@ -644,6 +653,13 @@ source "arch/alpha/oprofile/Kconfig"
source "arch/alpha/Kconfig.debug"
# DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
# but we also need it if VGA_HOSE is set
config DUMMY_CONSOLE
bool
depends on VGA_HOSE
default y
source "security/Kconfig"
source "crypto/Kconfig"

70
arch/alpha/kernel/console.c
View File

@ -9,16 +9,20 @@
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/vt.h>
#include <asm/vga.h>
#include <asm/machvec.h>
#include "pci_impl.h"
#ifdef CONFIG_VGA_HOSE
/*
* Externally-visible vga hose bases
*/
unsigned long __vga_hose_io_base = 0; /* base for default hose */
unsigned long __vga_hose_mem_base = 0; /* base for default hose */
struct pci_controller *pci_vga_hose;
static struct resource alpha_vga = {
.name = "alpha-vga+",
.start = 0x3C0,
.end = 0x3DF
};
static struct pci_controller * __init
default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2)
@ -29,37 +33,59 @@ default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2)
return h1;
}
void __init
set_vga_hose(struct pci_controller *hose)
{
if (hose) {
__vga_hose_io_base = hose->io_space->start;
__vga_hose_mem_base = hose->mem_space->start;
}
}
void __init
locate_and_init_vga(void *(*sel_func)(void *, void *))
{
struct pci_controller *hose = NULL;
struct pci_dev *dev = NULL;
/* Default the select function */
if (!sel_func) sel_func = (void *)default_vga_hose_select;
/* Find the console VGA device */
for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) {
if (!hose) hose = dev->sysdata;
else hose = sel_func(hose, dev->sysdata);
if (!hose)
hose = dev->sysdata;
else
hose = sel_func(hose, dev->sysdata);
}
/* Did we already inititialize the correct one? */
if (conswitchp == &vga_con &&
__vga_hose_io_base == hose->io_space->start &&
__vga_hose_mem_base == hose->mem_space->start)
/* Did we already initialize the correct one? Is there one? */
if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose))
return;
/* Set the VGA hose and init the new console */
set_vga_hose(hose);
/* Create a new VGA ioport resource WRT the hose it is on. */
alpha_vga.start += hose->io_space->start;
alpha_vga.end += hose->io_space->start;
request_resource(hose->io_space, &alpha_vga);
/* Set the VGA hose and init the new console. */
pci_vga_hose = hose;
take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1);
}
void __init
find_console_vga_hose(void)
{
u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
if (pu64[7] == 3) { /* TERM_TYPE == graphics */
struct pci_controller *hose;
int h = (pu64[30] >> 24) & 0xff; /* console hose # */
/*
* Our hose numbering DOES match the console's, so find
* the right one...
*/
for (hose = hose_head; hose; hose = hose->next) {
if (hose->index == h) break;
}
if (hose) {
printk("Console graphics on hose %d\n", h);
pci_vga_hose = hose;
}
}
}
#endif

43
arch/alpha/kernel/core_marvel.c
View File

@ -25,6 +25,7 @@
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/rtc.h>
#include <asm/vga.h>
#include "proto.h"
#include "pci_impl.h"
@ -367,9 +368,8 @@ marvel_io7_present(gct6_node *node)
}
static void __init
marvel_init_vga_hose(void)
marvel_find_console_vga_hose(void)
{
#ifdef CONFIG_VGA_HOSE
u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
if (pu64[7] == 3) { /* TERM_TYPE == graphics */
@ -403,7 +403,6 @@ marvel_init_vga_hose(void)
pci_vga_hose = hose;
}
}
#endif /* CONFIG_VGA_HOSE */
}
gct6_search_struct gct_wanted_node_list[] = {
@ -459,7 +458,7 @@ marvel_init_arch(void)
marvel_init_io7(io7);
/* Check for graphic console location (if any). */
marvel_init_vga_hose();
marvel_find_console_vga_hose();
}
void
@ -684,9 +683,6 @@ __marvel_rtc_io(u8 b, unsigned long addr, int write)
/*
* IO map support.
*/
#define __marvel_is_mem_vga(a) (((a) >= 0xa0000) && ((a) <= 0xc0000))
void __iomem *
marvel_ioremap(unsigned long addr, unsigned long size)
{
@ -698,13 +694,9 @@ marvel_ioremap(unsigned long addr, unsigned long size)
unsigned long pfn;
/*
* Adjust the addr.
* Adjust the address.
*/
#ifdef CONFIG_VGA_HOSE
if (pci_vga_hose && __marvel_is_mem_vga(addr)) {
addr += pci_vga_hose->mem_space->start;
}
#endif
FIXUP_MEMADDR_VGA(addr);
/*
* Find the hose.
@ -781,7 +773,9 @@ marvel_ioremap(unsigned long addr, unsigned long size)
return (void __iomem *) vaddr;
}
return NULL;
/* Assume it was already a reasonable address */
vaddr = baddr + hose->mem_space->start;
return (void __iomem *) vaddr;
}
void
@ -803,21 +797,12 @@ marvel_is_mmio(const volatile void __iomem *xaddr)
return (addr & 0xFF000000UL) == 0;
}
#define __marvel_is_port_vga(a) \
(((a) >= 0x3b0) && ((a) < 0x3e0) && ((a) != 0x3b3) && ((a) != 0x3d3))
#define __marvel_is_port_kbd(a) (((a) == 0x60) || ((a) == 0x64))
#define __marvel_is_port_rtc(a) (((a) == 0x70) || ((a) == 0x71))
void __iomem *marvel_ioportmap (unsigned long addr)
{
if (__marvel_is_port_rtc (addr) || __marvel_is_port_kbd(addr))
;
#ifdef CONFIG_VGA_HOSE
else if (__marvel_is_port_vga (addr) && pci_vga_hose)
addr += pci_vga_hose->io_space->start;
#endif
else
return NULL;
FIXUP_IOADDR_VGA(addr);
return (void __iomem *)addr;
}
@ -829,8 +814,14 @@ marvel_ioread8(void __iomem *xaddr)
return 0;
else if (__marvel_is_port_rtc(addr))
return __marvel_rtc_io(0, addr, 0);
else
else if (marvel_is_ioaddr(addr))
return __kernel_ldbu(*(vucp)addr);
else
/* this should catch other legacy addresses
that would normally fail on MARVEL,
because there really is nothing there...
*/
return ~0;
}
void
@ -841,7 +832,7 @@ marvel_iowrite8(u8 b, void __iomem *xaddr)
return;
else if (__marvel_is_port_rtc(addr))
__marvel_rtc_io(b, addr, 1);
else
else if (marvel_is_ioaddr(addr))
__kernel_stb(b, *(vucp)addr);
}

70
arch/alpha/kernel/core_titan.c
View File

@ -21,6 +21,7 @@
#include <asm/smp.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/vga.h>
#include "proto.h"
#include "pci_impl.h"
@ -34,6 +35,11 @@ struct
unsigned long tba[4];
} saved_config[4] __attribute__((common));
/*
* Is PChip 1 present? No need to query it more than once.
*/
static int titan_pchip1_present;
/*
* BIOS32-style PCI interface:
*/
@ -344,43 +350,17 @@ titan_init_one_pachip_port(titan_pachip_port *port, int index)
static void __init
titan_init_pachips(titan_pachip *pachip0, titan_pachip *pachip1)
{
int pchip1_present = TITAN_cchip->csc.csr & 1L<<14;
titan_pchip1_present = TITAN_cchip->csc.csr & 1L<<14;
/* Init the ports in hose order... */
titan_init_one_pachip_port(&pachip0->g_port, 0); /* hose 0 */
if (pchip1_present)
if (titan_pchip1_present)
titan_init_one_pachip_port(&pachip1->g_port, 1);/* hose 1 */
titan_init_one_pachip_port(&pachip0->a_port, 2); /* hose 2 */
if (pchip1_present)
if (titan_pchip1_present)
titan_init_one_pachip_port(&pachip1->a_port, 3);/* hose 3 */
}
static void __init
titan_init_vga_hose(void)
{
#ifdef CONFIG_VGA_HOSE
u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
if (pu64[7] == 3) { /* TERM_TYPE == graphics */
struct pci_controller *hose;
int h = (pu64[30] >> 24) & 0xff; /* console hose # */
/*
* Our hose numbering matches the console's, so just find
* the right one...
*/
for (hose = hose_head; hose; hose = hose->next) {
if (hose->index == h) break;
}
if (hose) {
printk("Console graphics on hose %d\n", hose->index);
pci_vga_hose = hose;
}
}
#endif /* CONFIG_VGA_HOSE */
}
void __init
titan_init_arch(void)
{
@ -406,6 +386,7 @@ titan_init_arch(void)
/* With multiple PCI busses, we play with I/O as physical addrs. */
ioport_resource.end = ~0UL;
iomem_resource.end = ~0UL;
/* PCI DMA Direct Mapping is 1GB at 2GB. */
__direct_map_base = 0x80000000;
@ -415,7 +396,7 @@ titan_init_arch(void)
titan_init_pachips(TITAN_pachip0, TITAN_pachip1);
/* Check for graphic console location (if any). */
titan_init_vga_hose();
find_console_vga_hose();
}
static void
@ -441,9 +422,7 @@ titan_kill_one_pachip_port(titan_pachip_port *port, int index)
static void
titan_kill_pachips(titan_pachip *pachip0, titan_pachip *pachip1)
{
int pchip1_present = TITAN_cchip->csc.csr & 1L<<14;
if (pchip1_present) {
if (titan_pchip1_present) {
titan_kill_one_pachip_port(&pachip1->g_port, 1);
titan_kill_one_pachip_port(&pachip1->a_port, 3);
}
@ -462,6 +441,14 @@ titan_kill_arch(int mode)
* IO map support.
*/
void __iomem *
titan_ioportmap(unsigned long addr)
{
FIXUP_IOADDR_VGA(addr);
return (void __iomem *)(addr + TITAN_IO_BIAS);
}
void __iomem *
titan_ioremap(unsigned long addr, unsigned long size)
{
@ -475,14 +462,12 @@ titan_ioremap(unsigned long addr, unsigned long size)
unsigned long pfn;
/*
* Adjust the addr.
* Adjust the address and hose, if necessary.
*/
#ifdef CONFIG_VGA_HOSE
if (pci_vga_hose && __titan_is_mem_vga(addr)) {
if (pci_vga_hose && __is_mem_vga(addr)) {
h = pci_vga_hose->index;
addr += pci_vga_hose->mem_space->start;
}
#endif
/*
* Find the hose.
@ -521,8 +506,10 @@ titan_ioremap(unsigned long addr, unsigned long size)
* Map it
*/
area = get_vm_area(size, VM_IOREMAP);
if (!area)
if (!area) {
printk("ioremap failed... no vm_area...\n");
return NULL;
}
ptes = hose->sg_pci->ptes;
for (vaddr = (unsigned long)area->addr;
@ -539,7 +526,7 @@ titan_ioremap(unsigned long addr, unsigned long size)
if (__alpha_remap_area_pages(vaddr,
pfn << PAGE_SHIFT,
PAGE_SIZE, 0)) {
printk("FAILED to map...\n");
printk("FAILED to remap_area_pages...\n");
vfree(area->addr);
return NULL;
}
@ -551,7 +538,8 @@ titan_ioremap(unsigned long addr, unsigned long size)
return (void __iomem *) vaddr;
}
return NULL;
/* Assume a legacy (read: VGA) address, and return appropriately. */
return (void __iomem *)(addr + TITAN_MEM_BIAS);
}
void
@ -574,6 +562,7 @@ titan_is_mmio(const volatile void __iomem *xaddr)
}
#ifndef CONFIG_ALPHA_GENERIC
EXPORT_SYMBOL(titan_ioportmap);
EXPORT_SYMBOL(titan_ioremap);
EXPORT_SYMBOL(titan_iounmap);
EXPORT_SYMBOL(titan_is_mmio);
@ -750,6 +739,7 @@ titan_agp_info(void)
if (titan_query_agp(port))
hosenum = 2;
if (hosenum < 0 &&
titan_pchip1_present &&
titan_query_agp(port = &TITAN_pachip1->a_port))
hosenum = 3;

24
arch/alpha/kernel/core_tsunami.c
View File

@ -19,6 +19,7 @@
#include <asm/ptrace.h>
#include <asm/smp.h>
#include <asm/vga.h>
#include "proto.h"
#include "pci_impl.h"
@ -349,6 +350,26 @@ tsunami_init_one_pchip(tsunami_pchip *pchip, int index)
tsunami_pci_tbi(hose, 0, -1);
}
void __iomem *
tsunami_ioportmap(unsigned long addr)
{
FIXUP_IOADDR_VGA(addr);
return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
}
void __iomem *
tsunami_ioremap(unsigned long addr, unsigned long size)
{
FIXUP_MEMADDR_VGA(addr);
return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
}
#ifndef CONFIG_ALPHA_GENERIC
EXPORT_SYMBOL(tsunami_ioportmap);
EXPORT_SYMBOL(tsunami_ioremap);
#endif
void __init
tsunami_init_arch(void)
{
@ -393,6 +414,9 @@ tsunami_init_arch(void)
tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
if (TSUNAMI_cchip->csc.csr & 1L<<14)
tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
/* Check for graphic console location (if any). */
find_console_vga_hose();
}
static void

9
arch/alpha/kernel/proto.h
View File

@ -108,6 +108,15 @@ extern int wildfire_cpuid_to_nid(int);
extern unsigned long wildfire_node_mem_start(int);
extern unsigned long wildfire_node_mem_size(int);
/* console.c */
#ifdef CONFIG_VGA_HOSE
extern void find_console_vga_hose(void);
extern void locate_and_init_vga(void *(*)(void *, void *));
#else
static inline void find_console_vga_hose(void) { }
static inline void locate_and_init_vga(void *(*sel_func)(void *, void *)) { }
#endif
/* setup.c */
extern unsigned long srm_hae;
extern int boot_cpuid;

11
arch/alpha/kernel/sys_dp264.c
View File

@ -543,6 +543,7 @@ dp264_init_pci(void)
{
common_init_pci();
SMC669_Init(0);
locate_and_init_vga(NULL);
}
static void __init
@ -551,6 +552,14 @@ monet_init_pci(void)
common_init_pci();
SMC669_Init(1);
es1888_init();
locate_and_init_vga(NULL);
}
static void __init
clipper_init_pci(void)
{
common_init_pci();
locate_and_init_vga(NULL);
}
static void __init
@ -655,7 +664,7 @@ struct alpha_machine_vector clipper_mv __initmv = {
.init_arch = tsunami_init_arch,
.init_irq = clipper_init_irq,
.init_rtc = common_init_rtc,
.init_pci = common_init_pci,
.init_pci = clipper_init_pci,
.kill_arch = tsunami_kill_arch,
.pci_map_irq = clipper_map_irq,
.pci_swizzle = common_swizzle,

4
arch/alpha/kernel/sys_marvel.c
View File

@ -22,6 +22,7 @@
#include <asm/core_marvel.h>
#include <asm/hwrpb.h>
#include <asm/tlbflush.h>
#include <asm/vga.h>
#include "proto.h"
#include "err_impl.h"
@ -412,10 +413,7 @@ marvel_init_pci(void)
pci_probe_only = 1;
common_init_pci();
#ifdef CONFIG_VGA_HOSE
locate_and_init_vga(NULL);
#endif
/* Clear any io7 errors. */
for (io7 = NULL; (io7 = marvel_next_io7(io7)) != NULL; )

2
arch/alpha/kernel/sys_titan.c
View File

@ -331,9 +331,7 @@ titan_init_pci(void)
pci_probe_only = 1;
common_init_pci();
SMC669_Init(0);
#ifdef CONFIG_VGA_HOSE
locate_and_init_vga(NULL);
#endif
}

7
include/asm-alpha/core_titan.h
View File

@ -380,12 +380,7 @@ struct el_PRIVATEER_envdata_mcheck {
/*
* Memory functions. all accesses are done through linear space.
*/
__EXTERN_INLINE void __iomem *titan_ioportmap(unsigned long addr)
{
return (void __iomem *)(addr + TITAN_IO_BIAS);
}
extern void __iomem *titan_ioportmap(unsigned long addr);
extern void __iomem *titan_ioremap(unsigned long addr, unsigned long size);
extern void titan_iounmap(volatile void __iomem *addr);

15
include/asm-alpha/core_tsunami.h
View File

@ -2,6 +2,7 @@
#define __ALPHA_TSUNAMI__H__
#include <linux/types.h>
#include <linux/pci.h>
#include <asm/compiler.h>
/*
@ -302,18 +303,8 @@ struct el_TSUNAMI_sysdata_mcheck {
/*
* Memory functions. all accesses are done through linear space.
*/
__EXTERN_INLINE void __iomem *tsunami_ioportmap(unsigned long addr)
{
return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
}
__EXTERN_INLINE void __iomem *tsunami_ioremap(unsigned long addr,
unsigned long size)
{
return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
}
extern void __iomem *tsunami_ioportmap(unsigned long addr);
extern void __iomem *tsunami_ioremap(unsigned long addr, unsigned long size);
__EXTERN_INLINE int tsunami_is_ioaddr(unsigned long addr)
{
return addr >= TSUNAMI_BASE;

31
include/asm-alpha/vga.h
View File

@ -46,6 +46,37 @@ extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
#define vga_readb(a) readb((u8 __iomem *)(a))
#define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
#ifdef CONFIG_VGA_HOSE
#include <linux/ioport.h>
#include <linux/pci.h>
extern struct pci_controller *pci_vga_hose;
# define __is_port_vga(a) \
(((a) >= 0x3b0) && ((a) < 0x3e0) && \
((a) != 0x3b3) && ((a) != 0x3d3))
# define __is_mem_vga(a) \
(((a) >= 0xa0000) && ((a) <= 0xc0000))
# define FIXUP_IOADDR_VGA(a) do { \
if (pci_vga_hose && __is_port_vga(a)) \
(a) += pci_vga_hose->io_space->start; \
} while(0)
# define FIXUP_MEMADDR_VGA(a) do { \
if (pci_vga_hose && __is_mem_vga(a)) \
(a) += pci_vga_hose->mem_space->start; \
} while(0)
#else /* CONFIG_VGA_HOSE */
# define pci_vga_hose 0
# define __is_port_vga(a) 0
# define __is_mem_vga(a) 0
# define FIXUP_IOADDR_VGA(a)
# define FIXUP_MEMADDR_VGA(a)
#endif /* CONFIG_VGA_HOSE */
#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s))
#endif