From 3cd467a8ef49a2f1d047c24a50832b5c82c405c8 Mon Sep 17 00:00:00 2001
From: Min Xu <min.xu@min-info.net>
Date: Sat, 25 Oct 2014 21:05:37 +0200
Subject: req_ctx: Keep statistic about number of req_ctx in given state

... and print this from a debug statement.
---
 firmware/src/os/pcd_enumerate.c |  4 ++--
 firmware/src/os/req_ctx.c       | 18 ++++++++++++++++--
 firmware/src/os/req_ctx.h       |  1 +
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/firmware/src/os/pcd_enumerate.c b/firmware/src/os/pcd_enumerate.c
index 62f5809..a886377 100644
--- a/firmware/src/os/pcd_enumerate.c
+++ b/firmware/src/os/pcd_enumerate.c
@@ -180,8 +180,8 @@ int udp_refill_ep(int ep)
 			req_ctx_put(rctx);
 			return 0;
 		}
-		DEBUGPCR("USBTx %08X, Len = %04u, Head 4/Tail 4 bytes: %02X %02X %02X %02X / %02X %02X %02X %02X",
-			 rctx->data, rctx->tot_len,
+		DEBUGPCR("USBT(D=%08X, L=%04u, P=$02u) H4/T4: %02X %02X %02X %02X / %02X %02X %02X %02X",
+			 rctx->data, rctx->tot_len, req_ctx_count(epstate[ep].state_pending),
 			 rctx->data[4], rctx->data[5], rctx->data[6], rctx->data[7],
 			 rctx->data[rctx->tot_len - 4], rctx->data[rctx->tot_len - 3],
 			 rctx->data[rctx->tot_len - 2], rctx->data[rctx->tot_len - 1]);
diff --git a/firmware/src/os/req_ctx.c b/firmware/src/os/req_ctx.c
index 2411f62..a1495d9 100644
--- a/firmware/src/os/req_ctx.c
+++ b/firmware/src/os/req_ctx.c
@@ -49,6 +49,7 @@ static struct req_ctx req_ctx[NUM_REQ_CTX];
 
 /* queue of RCTX indexed by their current state */
 static struct req_ctx *req_ctx_queues[RCTX_STATE_COUNT], *req_ctx_tails[RCTX_STATE_COUNT];
+static unsigned req_counts[RCTX_STATE_COUNT];
 
 struct req_ctx __ramfunc *req_ctx_find_get(int large,
 				 unsigned long old_state, 
@@ -68,6 +69,7 @@ struct req_ctx __ramfunc *req_ctx_find_get(int large,
 			toReturn->next->prev = NULL;
 		else
 			req_ctx_tails[old_state] = NULL;
+		req_counts[old_state]--;
 		if ((toReturn->prev = req_ctx_tails[new_state]))
 			toReturn->prev->next = toReturn;
 		else
@@ -75,6 +77,7 @@ struct req_ctx __ramfunc *req_ctx_find_get(int large,
 		req_ctx_tails[new_state] = toReturn;
 		toReturn->state = new_state;
 		toReturn->next = NULL;
+		req_counts[new_state]++;
 	}
 	local_irq_restore(flags);
 	return toReturn;
@@ -104,7 +107,7 @@ void req_ctx_set_state(struct req_ctx *ctx, unsigned long new_state)
 		ctx->next->prev = ctx->prev;
 	else
 		req_ctx_tails[old_state] = ctx->prev;
-
+	req_counts[old_state]--;
 	if ((ctx->prev = req_ctx_tails[new_state]))
 		ctx->prev->next = ctx;
 	else
@@ -112,6 +115,7 @@ void req_ctx_set_state(struct req_ctx *ctx, unsigned long new_state)
 	req_ctx_tails[new_state] = ctx;
 	ctx->state = new_state;
 	ctx->next = NULL;
+	req_counts[new_state]++;
 	local_irq_restore(flags);
 }
 
@@ -158,7 +162,7 @@ void req_ctx_put(struct req_ctx *ctx)
 		ctx->next->prev = ctx->prev;
 	else
 		req_ctx_tails[old_state] = ctx->prev;
-
+	req_counts[old_state]--;
 	if ((ctx->prev = req_ctx_tails[RCTX_STATE_FREE]))
 		ctx->prev->next = ctx;
 	else
@@ -166,9 +170,17 @@ void req_ctx_put(struct req_ctx *ctx)
 	req_ctx_tails[RCTX_STATE_FREE] = ctx;
 	ctx->state = RCTX_STATE_FREE;
 	ctx->next = NULL;
+	req_counts[RCTX_STATE_FREE]++;
 	local_irq_restore(intcFlags);
 }
 
+unsigned int req_ctx_count(unsigned long state)
+{
+	if (state >= RCTX_STATE_COUNT)
+		return 0;
+	return req_counts[state];
+}
+
 void req_ctx_init(void)
 {
 	int i;
@@ -198,8 +210,10 @@ void req_ctx_init(void)
 
 	req_ctx_queues[RCTX_STATE_FREE] = req_ctx;
 	req_ctx_tails[RCTX_STATE_FREE] = req_ctx + NUM_REQ_CTX - 1;
+	req_counts[RCTX_STATE_FREE] = NUM_REQ_CTX;
 
 	for (i = RCTX_STATE_FREE + 1; i < RCTX_STATE_COUNT; i++) {
 		req_ctx_queues[i] = req_ctx_tails[i] = NULL;
+		req_counts[i] = 0;
 	}
 }
diff --git a/firmware/src/os/req_ctx.h b/firmware/src/os/req_ctx.h
index 1e53fa4..b576ffe 100644
--- a/firmware/src/os/req_ctx.h
+++ b/firmware/src/os/req_ctx.h
@@ -47,5 +47,6 @@ extern struct req_ctx *req_ctx_find_busy(void);
 extern void req_ctx_set_state(struct req_ctx *ctx, unsigned long new_state);
 extern void req_ctx_put(struct req_ctx *ctx);
 extern u_int8_t req_ctx_num(struct req_ctx *ctx);
+unsigned int req_ctx_count(unsigned long state);
 
 #endif /* _REQ_CTX_H */
-- 
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