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Diffstat (limited to 'arch/arm/mach-ixp4xx/ixp4xx_qmgr.c')
-rw-r--r--arch/arm/mach-ixp4xx/ixp4xx_qmgr.c135
1 files changed, 109 insertions, 26 deletions
diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
index bfddc73d0a2..bfdbe4b5a3c 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
@@ -18,8 +18,8 @@ struct qmgr_regs __iomem *qmgr_regs;
static struct resource *mem_res;
static spinlock_t qmgr_lock;
static u32 used_sram_bitmap[4]; /* 128 16-dword pages */
-static void (*irq_handlers[HALF_QUEUES])(void *pdev);
-static void *irq_pdevs[HALF_QUEUES];
+static void (*irq_handlers[QUEUES])(void *pdev);
+static void *irq_pdevs[QUEUES];
#if DEBUG_QMGR
char qmgr_queue_descs[QUEUES][32];
@@ -28,51 +28,112 @@ char qmgr_queue_descs[QUEUES][32];
void qmgr_set_irq(unsigned int queue, int src,
void (*handler)(void *pdev), void *pdev)
{
- u32 __iomem *reg = &qmgr_regs->irqsrc[queue / 8]; /* 8 queues / u32 */
- int bit = (queue % 8) * 4; /* 3 bits + 1 reserved bit per queue */
unsigned long flags;
- src &= 7;
spin_lock_irqsave(&qmgr_lock, flags);
- __raw_writel((__raw_readl(reg) & ~(7 << bit)) | (src << bit), reg);
+ if (queue < HALF_QUEUES) {
+ u32 __iomem *reg;
+ int bit;
+ BUG_ON(src > QUEUE_IRQ_SRC_NOT_FULL);
+ reg = &qmgr_regs->irqsrc[queue >> 3]; /* 8 queues per u32 */
+ bit = (queue % 8) * 4; /* 3 bits + 1 reserved bit per queue */
+ __raw_writel((__raw_readl(reg) & ~(7 << bit)) | (src << bit),
+ reg);
+ } else
+ /* IRQ source for queues 32-63 is fixed */
+ BUG_ON(src != QUEUE_IRQ_SRC_NOT_NEARLY_EMPTY);
+
irq_handlers[queue] = handler;
irq_pdevs[queue] = pdev;
spin_unlock_irqrestore(&qmgr_lock, flags);
}
-static irqreturn_t qmgr_irq1(int irq, void *pdev)
+static irqreturn_t qmgr_irq1_a0(int irq, void *pdev)
{
- int i;
- u32 val = __raw_readl(&qmgr_regs->irqstat[0]);
- __raw_writel(val, &qmgr_regs->irqstat[0]); /* ACK */
-
- for (i = 0; i < HALF_QUEUES; i++)
- if (val & (1 << i))
+ int i, ret = 0;
+ u32 en_bitmap, src, stat;
+
+ /* ACK - it may clear any bits so don't rely on it */
+ __raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[0]);
+
+ en_bitmap = qmgr_regs->irqen[0];
+ while (en_bitmap) {
+ i = __fls(en_bitmap); /* number of the last "low" queue */
+ en_bitmap &= ~BIT(i);
+ src = qmgr_regs->irqsrc[i >> 3];
+ stat = qmgr_regs->stat1[i >> 3];
+ if (src & 4) /* the IRQ condition is inverted */
+ stat = ~stat;
+ if (stat & BIT(src & 3)) {
irq_handlers[i](irq_pdevs[i]);
+ ret = IRQ_HANDLED;
+ }
+ }
+ return ret;
+}
+
+
+static irqreturn_t qmgr_irq2_a0(int irq, void *pdev)
+{
+ int i, ret = 0;
+ u32 req_bitmap;
+
+ /* ACK - it may clear any bits so don't rely on it */
+ __raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[1]);
+
+ req_bitmap = qmgr_regs->irqen[1] & qmgr_regs->statne_h;
+ while (req_bitmap) {
+ i = __fls(req_bitmap); /* number of the last "high" queue */
+ req_bitmap &= ~BIT(i);
+ irq_handlers[HALF_QUEUES + i](irq_pdevs[HALF_QUEUES + i]);
+ ret = IRQ_HANDLED;
+ }
+ return ret;
+}
- return val ? IRQ_HANDLED : 0;
+
+static irqreturn_t qmgr_irq(int irq, void *pdev)
+{
+ int i, half = (irq == IRQ_IXP4XX_QM1 ? 0 : 1);
+ u32 req_bitmap = __raw_readl(&qmgr_regs->irqstat[half]);
+
+ if (!req_bitmap)
+ return 0;
+ __raw_writel(req_bitmap, &qmgr_regs->irqstat[half]); /* ACK */
+
+ while (req_bitmap) {
+ i = __fls(req_bitmap); /* number of the last queue */
+ req_bitmap &= ~BIT(i);
+ i += half * HALF_QUEUES;
+ irq_handlers[i](irq_pdevs[i]);
+ }
+ return IRQ_HANDLED;
}
void qmgr_enable_irq(unsigned int queue)
{
unsigned long flags;
+ int half = queue / 32;
+ u32 mask = 1 << (queue & (HALF_QUEUES - 1));
spin_lock_irqsave(&qmgr_lock, flags);
- __raw_writel(__raw_readl(&qmgr_regs->irqen[0]) | (1 << queue),
- &qmgr_regs->irqen[0]);
+ __raw_writel(__raw_readl(&qmgr_regs->irqen[half]) | mask,
+ &qmgr_regs->irqen[half]);
spin_unlock_irqrestore(&qmgr_lock, flags);
}
void qmgr_disable_irq(unsigned int queue)
{
unsigned long flags;
+ int half = queue / 32;
+ u32 mask = 1 << (queue & (HALF_QUEUES - 1));
spin_lock_irqsave(&qmgr_lock, flags);
- __raw_writel(__raw_readl(&qmgr_regs->irqen[0]) & ~(1 << queue),
- &qmgr_regs->irqen[0]);
- __raw_writel(1 << queue, &qmgr_regs->irqstat[0]); /* clear */
+ __raw_writel(__raw_readl(&qmgr_regs->irqen[half]) & ~mask,
+ &qmgr_regs->irqen[half]);
+ __raw_writel(mask, &qmgr_regs->irqstat[half]); /* clear */
spin_unlock_irqrestore(&qmgr_lock, flags);
}
@@ -98,8 +159,7 @@ int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
u32 cfg, addr = 0, mask[4]; /* in 16-dwords */
int err;
- if (queue >= HALF_QUEUES)
- return -ERANGE;
+ BUG_ON(queue >= QUEUES);
if ((nearly_empty_watermark | nearly_full_watermark) & ~7)
return -EINVAL;
@@ -180,7 +240,7 @@ void qmgr_release_queue(unsigned int queue)
{
u32 cfg, addr, mask[4];
- BUG_ON(queue >= HALF_QUEUES); /* not in valid range */
+ BUG_ON(queue >= QUEUES); /* not in valid range */
spin_lock_irq(&qmgr_lock);
cfg = __raw_readl(&qmgr_regs->sram[queue]);
@@ -224,6 +284,8 @@ void qmgr_release_queue(unsigned int queue)
static int qmgr_init(void)
{
int i, err;
+ irq_handler_t handler1, handler2;
+
mem_res = request_mem_region(IXP4XX_QMGR_BASE_PHYS,
IXP4XX_QMGR_REGION_SIZE,
"IXP4xx Queue Manager");
@@ -247,23 +309,42 @@ static int qmgr_init(void)
__raw_writel(0, &qmgr_regs->irqen[i]);
}
+ __raw_writel(0xFFFFFFFF, &qmgr_regs->statne_h);
+ __raw_writel(0, &qmgr_regs->statf_h);
+
for (i = 0; i < QUEUES; i++)
__raw_writel(0, &qmgr_regs->sram[i]);
- err = request_irq(IRQ_IXP4XX_QM1, qmgr_irq1, 0,
- "IXP4xx Queue Manager", NULL);
+ if (cpu_is_ixp42x_rev_a0()) {
+ handler1 = qmgr_irq1_a0;
+ handler2 = qmgr_irq2_a0;
+ } else
+ handler1 = handler2 = qmgr_irq;
+
+ err = request_irq(IRQ_IXP4XX_QM1, handler1, 0, "IXP4xx Queue Manager",
+ NULL);
if (err) {
- printk(KERN_ERR "qmgr: failed to request IRQ%i\n",
- IRQ_IXP4XX_QM1);
+ printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
+ IRQ_IXP4XX_QM1, err);
goto error_irq;
}
+ err = request_irq(IRQ_IXP4XX_QM2, handler2, 0, "IXP4xx Queue Manager",
+ NULL);
+ if (err) {
+ printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
+ IRQ_IXP4XX_QM2, err);
+ goto error_irq2;
+ }
+
used_sram_bitmap[0] = 0xF; /* 4 first pages reserved for config */
spin_lock_init(&qmgr_lock);
printk(KERN_INFO "IXP4xx Queue Manager initialized.\n");
return 0;
+error_irq2:
+ free_irq(IRQ_IXP4XX_QM1, NULL);
error_irq:
iounmap(qmgr_regs);
error_map:
@@ -274,7 +355,9 @@ error_map:
static void qmgr_remove(void)
{
free_irq(IRQ_IXP4XX_QM1, NULL);
+ 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);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 09:10:53 +0000