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Automatic merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6.git/

This commit is contained in:
Linus Torvalds 2005-05-19 15:31:18 -07:00
parent 804c64ea86 4b40033ef1
commit 66e60f9251
5 changed files with 162 additions and 152 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

165
arch/sparc64/kernel/pci_iommu.c
View File

@ -8,6 +8,7 @@
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <asm/pbm.h>
@ -379,6 +380,54 @@ bad:
return PCI_DMA_ERROR_CODE;
}
static void pci_strbuf_flush(struct pci_strbuf *strbuf, struct pci_iommu *iommu, u32 vaddr, unsigned long ctx, unsigned long npages)
{
int limit;
PCI_STC_FLUSHFLAG_INIT(strbuf);
if (strbuf->strbuf_ctxflush &&
iommu->iommu_ctxflush) {
unsigned long matchreg, flushreg;
flushreg = strbuf->strbuf_ctxflush;
matchreg = PCI_STC_CTXMATCH_ADDR(strbuf, ctx);
limit = 10000;
do {
pci_iommu_write(flushreg, ctx);
udelay(10);
limit--;
if (!limit)
break;
} while(((long)pci_iommu_read(matchreg)) < 0L);
if (!limit)
printk(KERN_WARNING "pci_strbuf_flush: ctx flush "
"timeout vaddr[%08x] ctx[%lx]\n",
vaddr, ctx);
} else {
unsigned long i;
for (i = 0; i < npages; i++, vaddr += IO_PAGE_SIZE)
pci_iommu_write(strbuf->strbuf_pflush, vaddr);
}
pci_iommu_write(strbuf->strbuf_fsync, strbuf->strbuf_flushflag_pa);
(void) pci_iommu_read(iommu->write_complete_reg);
limit = 10000;
while (!PCI_STC_FLUSHFLAG_SET(strbuf)) {
limit--;
if (!limit)
break;
udelay(10);
membar("#LoadLoad");
}
if (!limit)
printk(KERN_WARNING "pci_strbuf_flush: flushflag timeout "
"vaddr[%08x] ctx[%lx] npages[%ld]\n",
vaddr, ctx, npages);
}
/* Unmap a single streaming mode DMA translation. */
void pci_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction)
{
@ -386,7 +435,7 @@ void pci_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int
struct pci_iommu *iommu;
struct pci_strbuf *strbuf;
iopte_t *base;
unsigned long flags, npages, i, ctx;
unsigned long flags, npages, ctx;
if (direction == PCI_DMA_NONE)
BUG();
@ -414,29 +463,8 @@ void pci_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int
ctx = (iopte_val(*base) & IOPTE_CONTEXT) >> 47UL;
/* Step 1: Kick data out of streaming buffers if necessary. */
if (strbuf->strbuf_enabled) {
u32 vaddr = bus_addr;
PCI_STC_FLUSHFLAG_INIT(strbuf);
if (strbuf->strbuf_ctxflush &&
iommu->iommu_ctxflush) {
unsigned long matchreg, flushreg;
flushreg = strbuf->strbuf_ctxflush;
matchreg = PCI_STC_CTXMATCH_ADDR(strbuf, ctx);
do {
pci_iommu_write(flushreg, ctx);
} while(((long)pci_iommu_read(matchreg)) < 0L);
} else {
for (i = 0; i < npages; i++, vaddr += IO_PAGE_SIZE)
pci_iommu_write(strbuf->strbuf_pflush, vaddr);
}
pci_iommu_write(strbuf->strbuf_fsync, strbuf->strbuf_flushflag_pa);
(void) pci_iommu_read(iommu->write_complete_reg);
while (!PCI_STC_FLUSHFLAG_SET(strbuf))
membar("#LoadLoad");
}
if (strbuf->strbuf_enabled)
pci_strbuf_flush(strbuf, iommu, bus_addr, ctx, npages);
/* Step 2: Clear out first TSB entry. */
iopte_make_dummy(iommu, base);
@ -647,29 +675,8 @@ void pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems,
ctx = (iopte_val(*base) & IOPTE_CONTEXT) >> 47UL;
/* Step 1: Kick data out of streaming buffers if necessary. */
if (strbuf->strbuf_enabled) {
u32 vaddr = (u32) bus_addr;
PCI_STC_FLUSHFLAG_INIT(strbuf);
if (strbuf->strbuf_ctxflush &&
iommu->iommu_ctxflush) {
unsigned long matchreg, flushreg;
flushreg = strbuf->strbuf_ctxflush;
matchreg = PCI_STC_CTXMATCH_ADDR(strbuf, ctx);
do {
pci_iommu_write(flushreg, ctx);
} while(((long)pci_iommu_read(matchreg)) < 0L);
} else {
for (i = 0; i < npages; i++, vaddr += IO_PAGE_SIZE)
pci_iommu_write(strbuf->strbuf_pflush, vaddr);
}
pci_iommu_write(strbuf->strbuf_fsync, strbuf->strbuf_flushflag_pa);
(void) pci_iommu_read(iommu->write_complete_reg);
while (!PCI_STC_FLUSHFLAG_SET(strbuf))
membar("#LoadLoad");
}
if (strbuf->strbuf_enabled)
pci_strbuf_flush(strbuf, iommu, bus_addr, ctx, npages);
/* Step 2: Clear out first TSB entry. */
iopte_make_dummy(iommu, base);
@ -715,28 +722,7 @@ void pci_dma_sync_single_for_cpu(struct pci_dev *pdev, dma_addr_t bus_addr, size
}
/* Step 2: Kick data out of streaming buffers. */
PCI_STC_FLUSHFLAG_INIT(strbuf);
if (iommu->iommu_ctxflush &&
strbuf->strbuf_ctxflush) {
unsigned long matchreg, flushreg;
flushreg = strbuf->strbuf_ctxflush;
matchreg = PCI_STC_CTXMATCH_ADDR(strbuf, ctx);
do {
pci_iommu_write(flushreg, ctx);
} while(((long)pci_iommu_read(matchreg)) < 0L);
} else {
unsigned long i;
for (i = 0; i < npages; i++, bus_addr += IO_PAGE_SIZE)
pci_iommu_write(strbuf->strbuf_pflush, bus_addr);
}
/* Step 3: Perform flush synchronization sequence. */
pci_iommu_write(strbuf->strbuf_fsync, strbuf->strbuf_flushflag_pa);
(void) pci_iommu_read(iommu->write_complete_reg);
while (!PCI_STC_FLUSHFLAG_SET(strbuf))
membar("#LoadLoad");
pci_strbuf_flush(strbuf, iommu, bus_addr, ctx, npages);
spin_unlock_irqrestore(&iommu->lock, flags);
}
@ -749,7 +735,8 @@ void pci_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist *sglist, i
struct pcidev_cookie *pcp;
struct pci_iommu *iommu;
struct pci_strbuf *strbuf;
unsigned long flags, ctx;
unsigned long flags, ctx, npages, i;
u32 bus_addr;
pcp = pdev->sysdata;
iommu = pcp->pbm->iommu;
@ -772,36 +759,14 @@ void pci_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist *sglist, i
}
/* Step 2: Kick data out of streaming buffers. */
PCI_STC_FLUSHFLAG_INIT(strbuf);
if (iommu->iommu_ctxflush &&
strbuf->strbuf_ctxflush) {
unsigned long matchreg, flushreg;
flushreg = strbuf->strbuf_ctxflush;
matchreg = PCI_STC_CTXMATCH_ADDR(strbuf, ctx);
do {
pci_iommu_write(flushreg, ctx);
} while (((long)pci_iommu_read(matchreg)) < 0L);
} else {
unsigned long i, npages;
u32 bus_addr;
bus_addr = sglist[0].dma_address & IO_PAGE_MASK;
for(i = 1; i < nelems; i++)
if (!sglist[i].dma_length)
break;
i--;
npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length) - bus_addr) >> IO_PAGE_SHIFT;
for (i = 0; i < npages; i++, bus_addr += IO_PAGE_SIZE)
pci_iommu_write(strbuf->strbuf_pflush, bus_addr);
}
/* Step 3: Perform flush synchronization sequence. */
pci_iommu_write(strbuf->strbuf_fsync, strbuf->strbuf_flushflag_pa);
(void) pci_iommu_read(iommu->write_complete_reg);
while (!PCI_STC_FLUSHFLAG_SET(strbuf))
membar("#LoadLoad");
bus_addr = sglist[0].dma_address & IO_PAGE_MASK;
for(i = 1; i < nelems; i++)
if (!sglist[i].dma_length)
break;
i--;
npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length)
- bus_addr) >> IO_PAGE_SHIFT;
pci_strbuf_flush(strbuf, iommu, bus_addr, ctx, npages);
spin_unlock_irqrestore(&iommu->lock, flags);
}

31
arch/sparc64/kernel/sbus.c
View File

@ -117,19 +117,34 @@ static void iommu_flush(struct sbus_iommu *iommu, u32 base, unsigned long npages
#define STRBUF_TAG_VALID 0x02UL
static void strbuf_flush(struct sbus_iommu *iommu, u32 base, unsigned long npages)
static void sbus_strbuf_flush(struct sbus_iommu *iommu, u32 base, unsigned long npages)
{
unsigned long n;
int limit;
iommu->strbuf_flushflag = 0UL;
while (npages--)
upa_writeq(base + (npages << IO_PAGE_SHIFT),
n = npages;
while (n--)
upa_writeq(base + (n << IO_PAGE_SHIFT),
iommu->strbuf_regs + STRBUF_PFLUSH);
/* Whoopee cushion! */
upa_writeq(__pa(&iommu->strbuf_flushflag),
iommu->strbuf_regs + STRBUF_FSYNC);
upa_readq(iommu->sbus_control_reg);
while (iommu->strbuf_flushflag == 0UL)
limit = 10000;
while (iommu->strbuf_flushflag == 0UL) {
limit--;
if (!limit)
break;
udelay(10);
membar("#LoadLoad");
}
if (!limit)
printk(KERN_WARNING "sbus_strbuf_flush: flushflag timeout "
"vaddr[%08x] npages[%ld]\n",
base, npages);
}
static iopte_t *alloc_streaming_cluster(struct sbus_iommu *iommu, unsigned long npages)
@ -406,7 +421,7 @@ void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t dma_addr, size_t size,
spin_lock_irqsave(&iommu->lock, flags);
free_streaming_cluster(iommu, dma_base, size >> IO_PAGE_SHIFT);
strbuf_flush(iommu, dma_base, size >> IO_PAGE_SHIFT);
sbus_strbuf_flush(iommu, dma_base, size >> IO_PAGE_SHIFT);
spin_unlock_irqrestore(&iommu->lock, flags);
}
@ -569,7 +584,7 @@ void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int
iommu = sdev->bus->iommu;
spin_lock_irqsave(&iommu->lock, flags);
free_streaming_cluster(iommu, dvma_base, size >> IO_PAGE_SHIFT);
strbuf_flush(iommu, dvma_base, size >> IO_PAGE_SHIFT);
sbus_strbuf_flush(iommu, dvma_base, size >> IO_PAGE_SHIFT);
spin_unlock_irqrestore(&iommu->lock, flags);
}
@ -581,7 +596,7 @@ void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev, dma_addr_t base, size_t
size = (IO_PAGE_ALIGN(base + size) - (base & IO_PAGE_MASK));
spin_lock_irqsave(&iommu->lock, flags);
strbuf_flush(iommu, base & IO_PAGE_MASK, size >> IO_PAGE_SHIFT);
sbus_strbuf_flush(iommu, base & IO_PAGE_MASK, size >> IO_PAGE_SHIFT);
spin_unlock_irqrestore(&iommu->lock, flags);
}
@ -605,7 +620,7 @@ void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sg, int
size = IO_PAGE_ALIGN(sg[i].dma_address + sg[i].dma_length) - base;
spin_lock_irqsave(&iommu->lock, flags);
strbuf_flush(iommu, base, size >> IO_PAGE_SHIFT);
sbus_strbuf_flush(iommu, base, size >> IO_PAGE_SHIFT);
spin_unlock_irqrestore(&iommu->lock, flags);
}

8
drivers/sbus/char/aurora.c
View File

@ -81,10 +81,6 @@ unsigned char irqs[4] = {
int irqhit=0;
#endif
#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
static struct tty_driver *aurora_driver;
static struct Aurora_board aurora_board[AURORA_NBOARD] = {
{0,},
@ -594,7 +590,7 @@ static void aurora_transmit(struct Aurora_board const * bp, int chip)
&bp->r[chip]->r[CD180_TDR]);
port->COR2 &= ~COR2_ETC;
}
count = MIN(port->break_length, 0xff);
count = min(port->break_length, 0xff);
sbus_writeb(CD180_C_ESC,
&bp->r[chip]->r[CD180_TDR]);
sbus_writeb(CD180_C_DELAY,
@ -1575,7 +1571,7 @@ static int aurora_write(struct tty_struct * tty,
save_flags(flags);
while (1) {
cli();
c = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
c = min(count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
SERIAL_XMIT_SIZE - port->xmit_head));
if (c <= 0) {
restore_flags(flags);

109
drivers/serial/sunsab.c
View File

@ -61,6 +61,16 @@ struct uart_sunsab_port {
unsigned char pvr_dtr_bit; /* Which PVR bit is DTR */
unsigned char pvr_dsr_bit; /* Which PVR bit is DSR */
int type; /* SAB82532 version */
/* Setting configuration bits while the transmitter is active
* can cause garbage characters to get emitted by the chip.
* Therefore, we cache such writes here and do the real register
* write the next time the transmitter becomes idle.
*/
unsigned int cached_ebrg;
unsigned char cached_mode;
unsigned char cached_pvr;
unsigned char cached_dafo;
};
/*
@ -236,6 +246,7 @@ receive_chars(struct uart_sunsab_port *up,
}
static void sunsab_stop_tx(struct uart_port *, unsigned int);
static void sunsab_tx_idle(struct uart_sunsab_port *);
static void transmit_chars(struct uart_sunsab_port *up,
union sab82532_irq_status *stat)
@ -258,6 +269,7 @@ static void transmit_chars(struct uart_sunsab_port *up,
return;
set_bit(SAB82532_XPR, &up->irqflags);
sunsab_tx_idle(up);
if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
up->interrupt_mask1 |= SAB82532_IMR1_XPR;
@ -397,21 +409,21 @@ static void sunsab_set_mctrl(struct uart_port *port, unsigned int mctrl)
struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
if (mctrl & TIOCM_RTS) {
writeb(readb(&up->regs->rw.mode) & ~SAB82532_MODE_FRTS,
&up->regs->rw.mode);
writeb(readb(&up->regs->rw.mode) | SAB82532_MODE_RTS,
&up->regs->rw.mode);
up->cached_mode &= ~SAB82532_MODE_FRTS;
up->cached_mode |= SAB82532_MODE_RTS;
} else {
writeb(readb(&up->regs->rw.mode) | SAB82532_MODE_FRTS,
&up->regs->rw.mode);
writeb(readb(&up->regs->rw.mode) | SAB82532_MODE_RTS,
&up->regs->rw.mode);
up->cached_mode |= (SAB82532_MODE_FRTS |
SAB82532_MODE_RTS);
}
if (mctrl & TIOCM_DTR) {
writeb(readb(&up->regs->rw.pvr) & ~(up->pvr_dtr_bit), &up->regs->rw.pvr);
up->cached_pvr &= ~(up->pvr_dtr_bit);
} else {
writeb(readb(&up->regs->rw.pvr) | up->pvr_dtr_bit, &up->regs->rw.pvr);
up->cached_pvr |= up->pvr_dtr_bit;
}
set_bit(SAB82532_REGS_PENDING, &up->irqflags);
if (test_bit(SAB82532_XPR, &up->irqflags))
sunsab_tx_idle(up);
}
/* port->lock is not held. */
@ -449,6 +461,25 @@ static void sunsab_stop_tx(struct uart_port *port, unsigned int tty_stop)
writeb(up->interrupt_mask1, &up->regs->w.imr1);
}
/* port->lock held by caller. */
static void sunsab_tx_idle(struct uart_sunsab_port *up)
{
if (test_bit(SAB82532_REGS_PENDING, &up->irqflags)) {
u8 tmp;
clear_bit(SAB82532_REGS_PENDING, &up->irqflags);
writeb(up->cached_mode, &up->regs->rw.mode);
writeb(up->cached_pvr, &up->regs->rw.pvr);
writeb(up->cached_dafo, &up->regs->w.dafo);
writeb(up->cached_ebrg & 0xff, &up->regs->w.bgr);
tmp = readb(&up->regs->rw.ccr2);
tmp &= ~0xc0;
tmp |= (up->cached_ebrg >> 2) & 0xc0;
writeb(tmp, &up->regs->rw.ccr2);
}
}
/* port->lock held by caller. */
static void sunsab_start_tx(struct uart_port *port, unsigned int tty_start)
{
@ -517,12 +548,16 @@ static void sunsab_break_ctl(struct uart_port *port, int break_state)
spin_lock_irqsave(&up->port.lock, flags);
val = readb(&up->regs->rw.dafo);
val = up->cached_dafo;
if (break_state)
val |= SAB82532_DAFO_XBRK;
else
val &= ~SAB82532_DAFO_XBRK;
writeb(val, &up->regs->rw.dafo);
up->cached_dafo = val;
set_bit(SAB82532_REGS_PENDING, &up->irqflags);
if (test_bit(SAB82532_XPR, &up->irqflags))
sunsab_tx_idle(up);
spin_unlock_irqrestore(&up->port.lock, flags);
}
@ -566,8 +601,9 @@ static int sunsab_startup(struct uart_port *port)
SAB82532_CCR2_TOE, &up->regs->w.ccr2);
writeb(0, &up->regs->w.ccr3);
writeb(SAB82532_CCR4_MCK4 | SAB82532_CCR4_EBRG, &up->regs->w.ccr4);
writeb(SAB82532_MODE_RTS | SAB82532_MODE_FCTS |
SAB82532_MODE_RAC, &up->regs->w.mode);
up->cached_mode = (SAB82532_MODE_RTS | SAB82532_MODE_FCTS |
SAB82532_MODE_RAC);
writeb(up->cached_mode, &up->regs->w.mode);
writeb(SAB82532_RFC_DPS|SAB82532_RFC_RFTH_32, &up->regs->w.rfc);
tmp = readb(&up->regs->rw.ccr0);
@ -598,7 +634,6 @@ static void sunsab_shutdown(struct uart_port *port)
{
struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
unsigned long flags;
unsigned char tmp;
spin_lock_irqsave(&up->port.lock, flags);
@ -609,14 +644,13 @@ static void sunsab_shutdown(struct uart_port *port)
writeb(up->interrupt_mask1, &up->regs->w.imr1);
/* Disable break condition */
tmp = readb(&up->regs->rw.dafo);
tmp &= ~SAB82532_DAFO_XBRK;
writeb(tmp, &up->regs->rw.dafo);
up->cached_dafo = readb(&up->regs->rw.dafo);
up->cached_dafo &= ~SAB82532_DAFO_XBRK;
writeb(up->cached_dafo, &up->regs->rw.dafo);
/* Disable Receiver */
tmp = readb(&up->regs->rw.mode);
tmp &= ~SAB82532_MODE_RAC;
writeb(tmp, &up->regs->rw.mode);
up->cached_mode &= ~SAB82532_MODE_RAC;
writeb(up->cached_mode, &up->regs->rw.mode);
/*
* XXX FIXME
@ -685,7 +719,6 @@ static void sunsab_convert_to_sab(struct uart_sunsab_port *up, unsigned int cfla
unsigned int iflag, unsigned int baud,
unsigned int quot)
{
unsigned int ebrg;
unsigned char dafo;
int bits, n, m;
@ -714,10 +747,11 @@ static void sunsab_convert_to_sab(struct uart_sunsab_port *up, unsigned int cfla
} else {
dafo |= SAB82532_DAFO_PAR_EVEN;
}
up->cached_dafo = dafo;
calc_ebrg(baud, &n, &m);
ebrg = n | (m << 6);
up->cached_ebrg = n | (m << 6);
up->tec_timeout = (10 * 1000000) / baud;
up->cec_timeout = up->tec_timeout >> 2;
@ -770,16 +804,13 @@ static void sunsab_convert_to_sab(struct uart_sunsab_port *up, unsigned int cfla
uart_update_timeout(&up->port, cflag,
(up->port.uartclk / (16 * quot)));
/* Now bang the new settings into the chip. */
sunsab_cec_wait(up);
sunsab_tec_wait(up);
writeb(dafo, &up->regs->w.dafo);
writeb(ebrg & 0xff, &up->regs->w.bgr);
writeb((readb(&up->regs->rw.ccr2) & ~0xc0) | ((ebrg >> 2) & 0xc0),
&up->regs->rw.ccr2);
writeb(readb(&up->regs->rw.mode) | SAB82532_MODE_RAC, &up->regs->rw.mode);
/* Now schedule a register update when the chip's
* transmitter is idle.
*/
up->cached_mode |= SAB82532_MODE_RAC;
set_bit(SAB82532_REGS_PENDING, &up->irqflags);
if (test_bit(SAB82532_XPR, &up->irqflags))
sunsab_tx_idle(up);
}
/* port->lock is not held. */
@ -1084,11 +1115,13 @@ static void __init sunsab_init_hw(void)
up->pvr_dsr_bit = (1 << 3);
up->pvr_dtr_bit = (1 << 2);
}
writeb((1 << 1) | (1 << 2) | (1 << 4), &up->regs->w.pvr);
writeb(readb(&up->regs->rw.mode) | SAB82532_MODE_FRTS,
&up->regs->rw.mode);
writeb(readb(&up->regs->rw.mode) | SAB82532_MODE_RTS,
&up->regs->rw.mode);
up->cached_pvr = (1 << 1) | (1 << 2) | (1 << 4);
writeb(up->cached_pvr, &up->regs->w.pvr);
up->cached_mode = readb(&up->regs->rw.mode);
up->cached_mode |= SAB82532_MODE_FRTS;
writeb(up->cached_mode, &up->regs->rw.mode);
up->cached_mode |= SAB82532_MODE_RTS;
writeb(up->cached_mode, &up->regs->rw.mode);
up->tec_timeout = SAB82532_MAX_TEC_TIMEOUT;
up->cec_timeout = SAB82532_MAX_CEC_TIMEOUT;

1
drivers/serial/sunsab.h
View File

@ -126,6 +126,7 @@ union sab82532_irq_status {
/* irqflags bits */
#define SAB82532_ALLS 0x00000001
#define SAB82532_XPR 0x00000002
#define SAB82532_REGS_PENDING 0x00000004
/* RFIFO Status Byte */
#define SAB82532_RSTAT_PE 0x80