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IXP4xx: Always ioremap() Queue Manager MMIO region at boot.

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It doesn't make much sense to map QMgr dynamically - we almost always need it
and the static mapping will be needed for little-endian data-coherent operation
(to make QMgr region value-coherent).

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
Krzysztof Hałasa 2010-03-26 16:38:52 +01:00 committed by Jason Cooper
parent 05cd3db0df
commit f0cdb15329
4 changed files with 17 additions and 21 deletions
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5
arch/arm/mach-ixp4xx/common.c
View File

@ -67,6 +67,11 @@ static struct map_desc ixp4xx_io_desc[] __initdata = {
.pfn = __phys_to_pfn(IXP4XX_PCI_CFG_BASE_PHYS),
.length = IXP4XX_PCI_CFG_REGION_SIZE,
.type = MT_DEVICE
}, { /* Queue Manager */
.virtual = (unsigned long)IXP4XX_QMGR_BASE_VIRT,
.pfn = __phys_to_pfn(IXP4XX_QMGR_BASE_PHYS),
.length = IXP4XX_QMGR_REGION_SIZE,
.type = MT_DEVICE
},
#ifdef CONFIG_DEBUG_LL
{ /* Debug UART mapping */

7
arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
View File

@ -30,19 +30,20 @@
*
* 0x50000000 0x10000000 ioremap'd EXP BUS
*
* 0x6000000 0x00004000 ioremap'd QMgr
* 0x60000000 0x00004000 0xffbe7000 QMgr
*
* 0xC0000000 0x00001000 0xffbff000 PCI CFG
* 0xC8000000 0x00013000 0xffbeb000 On-Chip Peripherals
*
* 0xC4000000 0x00001000 0xffbfe000 EXP CFG
*
* 0xC8000000 0x00013000 0xffbeb000 On-Chip Peripherals
* 0xC0000000 0x00001000 0xffbff000 PCI CFG
*/
/*
* Queue Manager
*/
#define IXP4XX_QMGR_BASE_PHYS (0x60000000)
#define IXP4XX_QMGR_BASE_VIRT IOMEM(0xFFBE7000)
#define IXP4XX_QMGR_REGION_SIZE (0x00004000)
/*

12
arch/arm/mach-ixp4xx/include/mach/qmgr.h
View File

@ -86,7 +86,7 @@ void qmgr_release_queue(unsigned int queue);
static inline void qmgr_put_entry(unsigned int queue, u32 val)
{
extern struct qmgr_regs __iomem *qmgr_regs;
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
#if DEBUG_QMGR
BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
@ -99,7 +99,7 @@ static inline void qmgr_put_entry(unsigned int queue, u32 val)
static inline u32 qmgr_get_entry(unsigned int queue)
{
u32 val;
extern struct qmgr_regs __iomem *qmgr_regs;
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
val = __raw_readl(&qmgr_regs->acc[queue][0]);
#if DEBUG_QMGR
BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
@ -112,14 +112,14 @@ static inline u32 qmgr_get_entry(unsigned int queue)
static inline int __qmgr_get_stat1(unsigned int queue)
{
extern struct qmgr_regs __iomem *qmgr_regs;
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
return (__raw_readl(&qmgr_regs->stat1[queue >> 3])
>> ((queue & 7) << 2)) & 0xF;
}
static inline int __qmgr_get_stat2(unsigned int queue)
{
extern struct qmgr_regs __iomem *qmgr_regs;
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
BUG_ON(queue >= HALF_QUEUES);
return (__raw_readl(&qmgr_regs->stat2[queue >> 4])
>> ((queue & 0xF) << 1)) & 0x3;
@ -145,7 +145,7 @@ static inline int qmgr_stat_empty(unsigned int queue)
*/
static inline int qmgr_stat_below_low_watermark(unsigned int queue)
{
extern struct qmgr_regs __iomem *qmgr_regs;
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
if (queue >= HALF_QUEUES)
return (__raw_readl(&qmgr_regs->statne_h) >>
(queue - HALF_QUEUES)) & 0x01;
@ -172,7 +172,7 @@ static inline int qmgr_stat_above_high_watermark(unsigned int queue)
*/
static inline int qmgr_stat_full(unsigned int queue)
{
extern struct qmgr_regs __iomem *qmgr_regs;
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
if (queue >= HALF_QUEUES)
return (__raw_readl(&qmgr_regs->statf_h) >>
(queue - HALF_QUEUES)) & 0x01;

14
arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
View File

@ -14,7 +14,7 @@
#include <linux/module.h>
#include <mach/qmgr.h>
struct qmgr_regs __iomem *qmgr_regs;
static const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
static struct resource *mem_res;
static spinlock_t qmgr_lock;
static u32 used_sram_bitmap[4]; /* 128 16-dword pages */
@ -32,7 +32,7 @@ void qmgr_set_irq(unsigned int queue, int src,
spin_lock_irqsave(&qmgr_lock, flags);
if (queue < HALF_QUEUES) {
u32 __iomem *reg;
const u32 __iomem *reg;
int bit;
BUG_ON(src > QUEUE_IRQ_SRC_NOT_FULL);
reg = &qmgr_regs->irqsrc[queue >> 3]; /* 8 queues per u32 */
@ -293,12 +293,6 @@ static int qmgr_init(void)
if (mem_res == NULL)
return -EBUSY;
qmgr_regs = ioremap(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
if (qmgr_regs == NULL) {
err = -ENOMEM;
goto error_map;
}
/* reset qmgr registers */
for (i = 0; i < 4; i++) {
__raw_writel(0x33333333, &qmgr_regs->stat1[i]);
@ -347,8 +341,6 @@ static int qmgr_init(void)
error_irq2:
free_irq(IRQ_IXP4XX_QM1, NULL);
error_irq:
iounmap(qmgr_regs);
error_map:
release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
return err;
}
@ -359,7 +351,6 @@ static void qmgr_remove(void)
free_irq(IRQ_IXP4XX_QM2, NULL);
synchronize_irq(IRQ_IXP4XX_QM1);
synchronize_irq(IRQ_IXP4XX_QM2);
iounmap(qmgr_regs);
release_mem_region(IXP4XX_QMGR_BASE_PHYS, IXP4XX_QMGR_REGION_SIZE);
}
@ -369,7 +360,6 @@ module_exit(qmgr_remove);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Krzysztof Halasa");
EXPORT_SYMBOL(qmgr_regs);
EXPORT_SYMBOL(qmgr_set_irq);
EXPORT_SYMBOL(qmgr_enable_irq);
EXPORT_SYMBOL(qmgr_disable_irq);