X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fnet%2Fwireless%2Fiwlwifi%2Fiwl-io.h;h=c719baf2585a49583f2cef7a4b02107e044830a5;hb=33e2bf6aa16061bae1253514e7c32af27d2b4b31;hp=083ea1ffbe87296f8533a2e5ab55d7498d5e4290;hpb=18d426c4a8991d1d6c0dc33a62b610b8a6ffc1d2;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/net/wireless/iwlwifi/iwl-io.h b/drivers/net/wireless/iwlwifi/iwl-io.h
index 083ea1f..c719baf 100644
--- a/drivers/net/wireless/iwlwifi/iwl-io.h
+++ b/drivers/net/wireless/iwlwifi/iwl-io.h
@@ -1,6 +1,6 @@
 /******************************************************************************
  *
- * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
+ * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
  *
  * Portions of this file are derived from the ipw3945 project.
  *
@@ -32,6 +32,7 @@
 #include <linux/io.h>
 
 #include "iwl-debug.h"
+#include "iwl-devtrace.h"
 
 /*
  * IO, register, and NIC memory access functions
@@ -61,7 +62,32 @@
  *
  */
 
-#define _iwl_write32(priv, ofs, val) iowrite32((val), (priv)->hw_base + (ofs))
+static inline void _iwl_write8(struct iwl_priv *priv, u32 ofs, u8 val)
+{
+	trace_iwlwifi_dev_iowrite8(priv, ofs, val);
+	iowrite8(val, priv->hw_base + ofs);
+}
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+static inline void __iwl_write8(const char *f, u32 l, struct iwl_priv *priv,
+				 u32 ofs, u8 val)
+{
+	IWL_DEBUG_IO(priv, "write8(0x%08X, 0x%02X) - %s %d\n", ofs, val, f, l);
+	_iwl_write8(priv, ofs, val);
+}
+#define iwl_write8(priv, ofs, val) \
+	__iwl_write8(__FILE__, __LINE__, priv, ofs, val)
+#else
+#define iwl_write8(priv, ofs, val) _iwl_write8(priv, ofs, val)
+#endif
+
+
+static inline void _iwl_write32(struct iwl_priv *priv, u32 ofs, u32 val)
+{
+	trace_iwlwifi_dev_iowrite32(priv, ofs, val);
+	iowrite32(val, priv->hw_base + ofs);
+}
+
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_write32(const char *f, u32 l, struct iwl_priv *priv,
 				 u32 ofs, u32 val)
@@ -75,7 +101,13 @@ static inline void __iwl_write32(const char *f, u32 l, struct iwl_priv *priv,
 #define iwl_write32(priv, ofs, val) _iwl_write32(priv, ofs, val)
 #endif
 
-#define _iwl_read32(priv, ofs) ioread32((priv)->hw_base + (ofs))
+static inline u32 _iwl_read32(struct iwl_priv *priv, u32 ofs)
+{
+	u32 val = ioread32(priv->hw_base + ofs);
+	trace_iwlwifi_dev_ioread32(priv, ofs, val);
+	return val;
+}
+
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline u32 __iwl_read32(char *f, u32 l, struct iwl_priv *priv, u32 ofs)
 {
@@ -131,9 +163,23 @@ static inline void __iwl_set_bit(const char *f, u32 l,
 	IWL_DEBUG_IO(priv, "set_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
 	_iwl_write32(priv, reg, val);
 }
-#define iwl_set_bit(p, r, m) __iwl_set_bit(__FILE__, __LINE__, p, r, m)
+static inline void iwl_set_bit(struct iwl_priv *p, u32 r, u32 m)
+{
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&p->reg_lock, reg_flags);
+	__iwl_set_bit(__FILE__, __LINE__, p, r, m);
+	spin_unlock_irqrestore(&p->reg_lock, reg_flags);
+}
 #else
-#define iwl_set_bit(p, r, m) _iwl_set_bit(p, r, m)
+static inline void iwl_set_bit(struct iwl_priv *p, u32 r, u32 m)
+{
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&p->reg_lock, reg_flags);
+	_iwl_set_bit(p, r, m);
+	spin_unlock_irqrestore(&p->reg_lock, reg_flags);
+}
 #endif
 
 static inline void _iwl_clear_bit(struct iwl_priv *priv, u32 reg, u32 mask)
@@ -148,21 +194,52 @@ static inline void __iwl_clear_bit(const char *f, u32 l,
 	IWL_DEBUG_IO(priv, "clear_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
 	_iwl_write32(priv, reg, val);
 }
-#define iwl_clear_bit(p, r, m) __iwl_clear_bit(__FILE__, __LINE__, p, r, m)
+static inline void iwl_clear_bit(struct iwl_priv *p, u32 r, u32 m)
+{
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&p->reg_lock, reg_flags);
+	__iwl_clear_bit(__FILE__, __LINE__, p, r, m);
+	spin_unlock_irqrestore(&p->reg_lock, reg_flags);
+}
 #else
-#define iwl_clear_bit(p, r, m) _iwl_clear_bit(p, r, m)
+static inline void iwl_clear_bit(struct iwl_priv *p, u32 r, u32 m)
+{
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&p->reg_lock, reg_flags);
+	_iwl_clear_bit(p, r, m);
+	spin_unlock_irqrestore(&p->reg_lock, reg_flags);
+}
 #endif
 
 static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
 {
 	int ret;
 	u32 val;
-#ifdef CONFIG_IWLWIFI_DEBUG
-	if (atomic_read(&priv->restrict_refcnt))
-		return 0;
-#endif
+
 	/* this bit wakes up the NIC */
 	_iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+
+	/*
+	 * These bits say the device is running, and should keep running for
+	 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
+	 * but they do not indicate that embedded SRAM is restored yet;
+	 * 3945 and 4965 have volatile SRAM, and must save/restore contents
+	 * to/from host DRAM when sleeping/waking for power-saving.
+	 * Each direction takes approximately 1/4 millisecond; with this
+	 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
+	 * series of register accesses are expected (e.g. reading Event Log),
+	 * to keep device from sleeping.
+	 *
+	 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
+	 * SRAM is okay/restored.  We don't check that here because this call
+	 * is just for hardware register access; but GP1 MAC_SLEEP check is a
+	 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
+	 *
+	 * 5000 series and later (including 1000 series) have non-volatile SRAM,
+	 * and do not save/restore SRAM when power cycling.
+	 */
 	ret = _iwl_poll_bit(priv, CSR_GP_CNTRL,
 			   CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
 			   (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
@@ -170,12 +247,10 @@ static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
 	if (ret < 0) {
 		val = _iwl_read32(priv, CSR_GP_CNTRL);
 		IWL_ERR(priv, "MAC is in deep sleep!.  CSR_GP_CNTRL = 0x%08X\n", val);
+		_iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
 		return -EIO;
 	}
 
-#ifdef CONFIG_IWLWIFI_DEBUG
-	atomic_inc(&priv->restrict_refcnt);
-#endif
 	return 0;
 }
 
@@ -183,9 +258,6 @@ static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
 static inline int __iwl_grab_nic_access(const char *f, u32 l,
 					       struct iwl_priv *priv)
 {
-	if (atomic_read(&priv->restrict_refcnt))
-		IWL_ERR(priv, "Grabbing access while already held %s %d.\n", f, l);
-
 	IWL_DEBUG_IO(priv, "grabbing nic access - %s %d\n", f, l);
 	return _iwl_grab_nic_access(priv);
 }
@@ -198,18 +270,13 @@ static inline int __iwl_grab_nic_access(const char *f, u32 l,
 
 static inline void _iwl_release_nic_access(struct iwl_priv *priv)
 {
-#ifdef CONFIG_IWLWIFI_DEBUG
-	if (atomic_dec_and_test(&priv->restrict_refcnt))
-#endif
-		_iwl_clear_bit(priv, CSR_GP_CNTRL,
-			       CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+	_iwl_clear_bit(priv, CSR_GP_CNTRL,
+			CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_release_nic_access(const char *f, u32 l,
 					    struct iwl_priv *priv)
 {
-	if (atomic_read(&priv->restrict_refcnt) <= 0)
-		IWL_ERR(priv, "Release unheld nic access at line %s %d.\n", f, l);
 
 	IWL_DEBUG_IO(priv, "releasing nic access - %s %d\n", f, l);
 	_iwl_release_nic_access(priv);
@@ -230,16 +297,37 @@ static inline u32 __iwl_read_direct32(const char *f, u32 l,
 					struct iwl_priv *priv, u32 reg)
 {
 	u32 value = _iwl_read_direct32(priv, reg);
-	if (!atomic_read(&priv->restrict_refcnt))
-		IWL_ERR(priv, "Nic access not held from %s %d\n", f, l);
 	IWL_DEBUG_IO(priv, "read_direct32(0x%4X) = 0x%08x - %s %d \n", reg, value,
 		     f, l);
 	return value;
 }
-#define iwl_read_direct32(priv, reg) \
-	__iwl_read_direct32(__FILE__, __LINE__, priv, reg)
+static inline u32 iwl_read_direct32(struct iwl_priv *priv, u32 reg)
+{
+	u32 value;
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	iwl_grab_nic_access(priv);
+	value = __iwl_read_direct32(__FILE__, __LINE__, priv, reg);
+	iwl_release_nic_access(priv);
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
+	return value;
+}
+
 #else
-#define iwl_read_direct32 _iwl_read_direct32
+static inline u32 iwl_read_direct32(struct iwl_priv *priv, u32 reg)
+{
+	u32 value;
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	iwl_grab_nic_access(priv);
+	value = _iwl_read_direct32(priv, reg);
+	iwl_release_nic_access(priv);
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
+	return value;
+
+}
 #endif
 
 static inline void _iwl_write_direct32(struct iwl_priv *priv,
@@ -247,19 +335,17 @@ static inline void _iwl_write_direct32(struct iwl_priv *priv,
 {
 	_iwl_write32(priv, reg, value);
 }
-#ifdef CONFIG_IWLWIFI_DEBUG
-static void __iwl_write_direct32(const char *f , u32 line,
-				   struct iwl_priv *priv, u32 reg, u32 value)
+static inline void iwl_write_direct32(struct iwl_priv *priv, u32 reg, u32 value)
 {
-	if (!atomic_read(&priv->restrict_refcnt))
-		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
-	_iwl_write_direct32(priv, reg, value);
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	if (!iwl_grab_nic_access(priv)) {
+		_iwl_write_direct32(priv, reg, value);
+		iwl_release_nic_access(priv);
+	}
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 }
-#define iwl_write_direct32(priv, reg, value) \
-	__iwl_write_direct32(__func__, __LINE__, priv, reg, value)
-#else
-#define iwl_write_direct32 _iwl_write_direct32
-#endif
 
 static inline void iwl_write_reg_buf(struct iwl_priv *priv,
 					       u32 reg, u32 len, u32 *values)
@@ -268,14 +354,23 @@ static inline void iwl_write_reg_buf(struct iwl_priv *priv,
 
 	if ((priv != NULL) && (values != NULL)) {
 		for (; 0 < len; len -= count, reg += count, values++)
-			_iwl_write_direct32(priv, reg, *values);
+			iwl_write_direct32(priv, reg, *values);
 	}
 }
 
 static inline int _iwl_poll_direct_bit(struct iwl_priv *priv, u32 addr,
 				       u32 mask, int timeout)
 {
-	return _iwl_poll_bit(priv, addr, mask, mask, timeout);
+	int t = 0;
+
+	do {
+		if ((iwl_read_direct32(priv, addr) & mask) == mask)
+			return t;
+		udelay(IWL_POLL_INTERVAL);
+		t += IWL_POLL_INTERVAL;
+	} while (t < timeout);
+
+	return -ETIMEDOUT;
 }
 
 #ifdef CONFIG_IWLWIFI_DEBUG
@@ -305,20 +400,18 @@ static inline u32 _iwl_read_prph(struct iwl_priv *priv, u32 reg)
 	rmb();
 	return _iwl_read_direct32(priv, HBUS_TARG_PRPH_RDAT);
 }
-#ifdef CONFIG_IWLWIFI_DEBUG
-static inline u32 __iwl_read_prph(const char *f, u32 line,
-				  struct iwl_priv *priv, u32 reg)
+static inline u32 iwl_read_prph(struct iwl_priv *priv, u32 reg)
 {
-	if (!atomic_read(&priv->restrict_refcnt))
-		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
-	return _iwl_read_prph(priv, reg);
-}
+	unsigned long reg_flags;
+	u32 val;
 
-#define iwl_read_prph(priv, reg) \
-	__iwl_read_prph(__func__, __LINE__, priv, reg)
-#else
-#define iwl_read_prph _iwl_read_prph
-#endif
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	iwl_grab_nic_access(priv);
+	val = _iwl_read_prph(priv, reg);
+	iwl_release_nic_access(priv);
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
+	return val;
+}
 
 static inline void _iwl_write_prph(struct iwl_priv *priv,
 					     u32 addr, u32 val)
@@ -328,83 +421,107 @@ static inline void _iwl_write_prph(struct iwl_priv *priv,
 	wmb();
 	_iwl_write_direct32(priv, HBUS_TARG_PRPH_WDAT, val);
 }
-#ifdef CONFIG_IWLWIFI_DEBUG
-static inline void __iwl_write_prph(const char *f, u32 line,
-				    struct iwl_priv *priv, u32 addr, u32 val)
+
+static inline void iwl_write_prph(struct iwl_priv *priv, u32 addr, u32 val)
 {
-	if (!atomic_read(&priv->restrict_refcnt))
-		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
-	_iwl_write_prph(priv, addr, val);
-}
+	unsigned long reg_flags;
 
-#define iwl_write_prph(priv, addr, val) \
-	__iwl_write_prph(__func__, __LINE__, priv, addr, val);
-#else
-#define iwl_write_prph _iwl_write_prph
-#endif
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	if (!iwl_grab_nic_access(priv)) {
+		_iwl_write_prph(priv, addr, val);
+		iwl_release_nic_access(priv);
+	}
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
+}
 
 #define _iwl_set_bits_prph(priv, reg, mask) \
 	_iwl_write_prph(priv, reg, (_iwl_read_prph(priv, reg) | mask))
-#ifdef CONFIG_IWLWIFI_DEBUG
-static inline void __iwl_set_bits_prph(const char *f, u32 line,
-				       struct iwl_priv *priv,
-				       u32 reg, u32 mask)
+
+static inline void iwl_set_bits_prph(struct iwl_priv *priv, u32 reg, u32 mask)
 {
-	if (!atomic_read(&priv->restrict_refcnt))
-		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
+	unsigned long reg_flags;
 
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	iwl_grab_nic_access(priv);
 	_iwl_set_bits_prph(priv, reg, mask);
+	iwl_release_nic_access(priv);
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 }
-#define iwl_set_bits_prph(priv, reg, mask) \
-	__iwl_set_bits_prph(__func__, __LINE__, priv, reg, mask)
-#else
-#define iwl_set_bits_prph _iwl_set_bits_prph
-#endif
 
 #define _iwl_set_bits_mask_prph(priv, reg, bits, mask) \
 	_iwl_write_prph(priv, reg, ((_iwl_read_prph(priv, reg) & mask) | bits))
 
-#ifdef CONFIG_IWLWIFI_DEBUG
-static inline void __iwl_set_bits_mask_prph(const char *f, u32 line,
-		struct iwl_priv *priv, u32 reg, u32 bits, u32 mask)
+static inline void iwl_set_bits_mask_prph(struct iwl_priv *priv, u32 reg,
+				u32 bits, u32 mask)
 {
-	if (!atomic_read(&priv->restrict_refcnt))
-		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	iwl_grab_nic_access(priv);
 	_iwl_set_bits_mask_prph(priv, reg, bits, mask);
+	iwl_release_nic_access(priv);
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 }
-#define iwl_set_bits_mask_prph(priv, reg, bits, mask) \
-	__iwl_set_bits_mask_prph(__func__, __LINE__, priv, reg, bits, mask)
-#else
-#define iwl_set_bits_mask_prph _iwl_set_bits_mask_prph
-#endif
 
 static inline void iwl_clear_bits_prph(struct iwl_priv
 						 *priv, u32 reg, u32 mask)
 {
-	u32 val = _iwl_read_prph(priv, reg);
+	unsigned long reg_flags;
+	u32 val;
+
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	iwl_grab_nic_access(priv);
+	val = _iwl_read_prph(priv, reg);
 	_iwl_write_prph(priv, reg, (val & ~mask));
+	iwl_release_nic_access(priv);
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 }
 
 static inline u32 iwl_read_targ_mem(struct iwl_priv *priv, u32 addr)
 {
-	iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, addr);
+	unsigned long reg_flags;
+	u32 value;
+
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	iwl_grab_nic_access(priv);
+
+	_iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, addr);
 	rmb();
-	return iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
+	value = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
+
+	iwl_release_nic_access(priv);
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
+	return value;
 }
 
 static inline void iwl_write_targ_mem(struct iwl_priv *priv, u32 addr, u32 val)
 {
-	iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
-	wmb();
-	iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, val);
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	if (!iwl_grab_nic_access(priv)) {
+		_iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
+		wmb();
+		_iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, val);
+		iwl_release_nic_access(priv);
+	}
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 }
 
 static inline void iwl_write_targ_mem_buf(struct iwl_priv *priv, u32 addr,
 					  u32 len, u32 *values)
 {
-	iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
-	wmb();
-	for (; 0 < len; len -= sizeof(u32), values++)
-		iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, *values);
+	unsigned long reg_flags;
+
+	spin_lock_irqsave(&priv->reg_lock, reg_flags);
+	if (!iwl_grab_nic_access(priv)) {
+		_iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
+		wmb();
+		for (; 0 < len; len -= sizeof(u32), values++)
+			_iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, *values);
+
+		iwl_release_nic_access(priv);
+	}
+	spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 }
 #endif