1 files changed, 95 insertions, 17 deletions

diff --git a/arch/arm/mach-ixp4xx/include/mach/qmgr.h b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
index 1e52b95cede..4de8da536db 100644
--- a/arch/arm/mach-ixp4xx/include/mach/qmgr.h
+++ b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
@@ -12,8 +12,10 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 
+#define DEBUG_QMGR	0
+
 #define HALF_QUEUES	32
-#define QUEUES		64	/* only 32 lower queues currently supported */
+#define QUEUES		64
 #define MAX_QUEUE_LENGTH 4	/* in dwords */
 
 #define QUEUE_STAT1_EMPTY		1 /* queue status bits */
@@ -61,66 +63,142 @@ void qmgr_enable_irq(unsigned int queue);
 void qmgr_disable_irq(unsigned int queue);
 
 /* request_ and release_queue() must be called from non-IRQ context */
+
+#if DEBUG_QMGR
+extern char qmgr_queue_descs[QUEUES][32];
+
 int qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
 		       unsigned int nearly_empty_watermark,
-		       unsigned int nearly_full_watermark);
+		       unsigned int nearly_full_watermark,
+		       const char *desc_format, const char* name);
+#else
+int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
+			 unsigned int nearly_empty_watermark,
+			 unsigned int nearly_full_watermark);
+#define qmgr_request_queue(queue, len, nearly_empty_watermark,		\
+			   nearly_full_watermark, desc_format, name)	\
+	__qmgr_request_queue(queue, len, nearly_empty_watermark,	\
+			     nearly_full_watermark)
+#endif
+
 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;
+	struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
+#if DEBUG_QMGR
+	BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
+
+	printk(KERN_DEBUG "Queue %s(%i) put %X\n",
+	       qmgr_queue_descs[queue], queue, val);
+#endif
 	__raw_writel(val, &qmgr_regs->acc[queue][0]);
 }
 
 static inline u32 qmgr_get_entry(unsigned int queue)
 {
-	extern struct qmgr_regs __iomem *qmgr_regs;
-	return __raw_readl(&qmgr_regs->acc[queue][0]);
+	u32 val;
+	const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
+	val = __raw_readl(&qmgr_regs->acc[queue][0]);
+#if DEBUG_QMGR
+	BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
+
+	printk(KERN_DEBUG "Queue %s(%i) get %X\n",
+	       qmgr_queue_descs[queue], queue, val);
+#endif
+	return val;
 }
 
-static inline int qmgr_get_stat1(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 = 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)
+static inline int __qmgr_get_stat2(unsigned int queue)
 {
-	extern struct qmgr_regs __iomem *qmgr_regs;
+	const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
+	BUG_ON(queue >= HALF_QUEUES);
 	return (__raw_readl(&qmgr_regs->stat2[queue >> 4])
 		>> ((queue & 0xF) << 1)) & 0x3;
 }
 
+/**
+ * qmgr_stat_empty() - checks if a hardware queue is empty
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is empty.
+ */
 static inline int qmgr_stat_empty(unsigned int queue)
 {
-	return !!(qmgr_get_stat1(queue) & QUEUE_STAT1_EMPTY);
+	BUG_ON(queue >= HALF_QUEUES);
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_EMPTY;
 }
 
-static inline int qmgr_stat_nearly_empty(unsigned int queue)
+/**
+ * qmgr_stat_below_low_watermark() - checks if a queue is below low watermark
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is below low watermark.
+ */
+static inline int qmgr_stat_below_low_watermark(unsigned int queue)
 {
-	return !!(qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_EMPTY);
+	const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
+	if (queue >= HALF_QUEUES)
+		return (__raw_readl(&qmgr_regs->statne_h) >>
+			(queue - HALF_QUEUES)) & 0x01;
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_EMPTY;
 }
 
-static inline int qmgr_stat_nearly_full(unsigned int queue)
+/**
+ * qmgr_stat_above_high_watermark() - checks if a queue is above high watermark
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is above high watermark
+ */
+static inline int qmgr_stat_above_high_watermark(unsigned int queue)
 {
-	return !!(qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_FULL);
+	BUG_ON(queue >= HALF_QUEUES);
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_NEARLY_FULL;
 }
 
+/**
+ * qmgr_stat_full() - checks if a hardware queue is full
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue is full.
+ */
 static inline int qmgr_stat_full(unsigned int queue)
 {
-	return !!(qmgr_get_stat1(queue) & QUEUE_STAT1_FULL);
+	const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
+	if (queue >= HALF_QUEUES)
+		return (__raw_readl(&qmgr_regs->statf_h) >>
+			(queue - HALF_QUEUES)) & 0x01;
+	return __qmgr_get_stat1(queue) & QUEUE_STAT1_FULL;
 }
 
+/**
+ * qmgr_stat_underflow() - checks if a hardware queue experienced underflow
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue experienced underflow.
+ */
 static inline int qmgr_stat_underflow(unsigned int queue)
 {
-	return !!(qmgr_get_stat2(queue) & QUEUE_STAT2_UNDERFLOW);
+	return __qmgr_get_stat2(queue) & QUEUE_STAT2_UNDERFLOW;
 }
 
+/**
+ * qmgr_stat_overflow() - checks if a hardware queue experienced overflow
+ * @queue:	queue number
+ *
+ * Returns non-zero value if the queue experienced overflow.
+ */
 static inline int qmgr_stat_overflow(unsigned int queue)
 {
-	return !!(qmgr_get_stat2(queue) & QUEUE_STAT2_OVERFLOW);
+	return __qmgr_get_stat2(queue) & QUEUE_STAT2_OVERFLOW;
 }
 
 #endif