From 7a4e5281d1b3335a3dc90841415390473cccebf3 Mon Sep 17 00:00:00 2001 From: Wey-Yi Guy Date: Fri, 6 May 2011 10:21:28 -0700 Subject: [PATCH] iwlagn: add testmode trace command Adding testmode trace/debug capability Signed-off-by: Wey-Yi Guy --- drivers/net/wireless/iwlwifi/iwl-agn.c | 1 + drivers/net/wireless/iwlwifi/iwl-agn.h | 5 ++ drivers/net/wireless/iwlwifi/iwl-dev.h | 11 +++ drivers/net/wireless/iwlwifi/iwl-sv-open.c | 133 ++++++++++++++++++++++++++++ drivers/net/wireless/iwlwifi/iwl-testmode.h | 15 ++++ 5 files changed, 165 insertions(+) diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index a7054a5..e027f99 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -3659,6 +3659,7 @@ static void __devexit iwl_pci_remove(struct pci_dev *pdev) */ set_bit(STATUS_EXIT_PENDING, &priv->status); + iwl_testmode_cleanup(priv); iwl_leds_exit(priv); if (priv->mac80211_registered) { diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.h b/drivers/net/wireless/iwlwifi/iwl-agn.h index fc7dc06..2495fe7 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.h +++ b/drivers/net/wireless/iwlwifi/iwl-agn.h @@ -343,6 +343,7 @@ extern int iwl_alive_start(struct iwl_priv *priv); #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL extern int iwl_testmode_cmd(struct ieee80211_hw *hw, void *data, int len); extern void iwl_testmode_init(struct iwl_priv *priv); +extern void iwl_testmode_cleanup(struct iwl_priv *priv); #else static inline int iwl_testmode_cmd(struct ieee80211_hw *hw, void *data, int len) @@ -353,6 +354,10 @@ static inline void iwl_testmode_init(struct iwl_priv *priv) { } +static inline +void iwl_testmode_cleanup(struct iwl_priv *priv) +{ +} #endif #endif /* __iwl_agn_h__ */ diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h index 3e3b8b8..12fb2f4 100644 --- a/drivers/net/wireless/iwlwifi/iwl-dev.h +++ b/drivers/net/wireless/iwlwifi/iwl-dev.h @@ -1179,6 +1179,14 @@ enum iwl_scan_type { IWL_SCAN_OFFCH_TX, }; +#ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL +struct iwl_testmode_trace { + u8 *cpu_addr; + u8 *trace_addr; + dma_addr_t dma_addr; + bool trace_enabled; +}; +#endif struct iwl_priv { /* ieee device used by generic ieee processing code */ @@ -1510,6 +1518,9 @@ struct iwl_priv { struct led_classdev led; unsigned long blink_on, blink_off; bool led_registered; +#ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL + struct iwl_testmode_trace testmode_trace; +#endif }; /*iwl_priv */ static inline void iwl_txq_ctx_activate(struct iwl_priv *priv, int txq_id) diff --git a/drivers/net/wireless/iwlwifi/iwl-sv-open.c b/drivers/net/wireless/iwlwifi/iwl-sv-open.c index dd2904a..b778c3f 100644 --- a/drivers/net/wireless/iwlwifi/iwl-sv-open.c +++ b/drivers/net/wireless/iwlwifi/iwl-sv-open.c @@ -97,6 +97,10 @@ struct nla_policy iwl_testmode_gnl_msg_policy[IWL_TM_ATTR_MAX] = { [IWL_TM_ATTR_SYNC_RSP] = { .type = NLA_UNSPEC, }, [IWL_TM_ATTR_UCODE_RX_PKT] = { .type = NLA_UNSPEC, }, + + [IWL_TM_ATTR_TRACE_ADDR] = { .type = NLA_UNSPEC, }, + [IWL_TM_ATTR_TRACE_DATA] = { .type = NLA_UNSPEC, }, + }; /* @@ -167,6 +171,31 @@ nla_put_failure: void iwl_testmode_init(struct iwl_priv *priv) { priv->pre_rx_handler = iwl_testmode_ucode_rx_pkt; + priv->testmode_trace.trace_enabled = false; +} + +static void iwl_trace_cleanup(struct iwl_priv *priv) +{ + struct device *dev = &priv->pci_dev->dev; + + if (priv->testmode_trace.trace_enabled) { + if (priv->testmode_trace.cpu_addr && + priv->testmode_trace.dma_addr) + dma_free_coherent(dev, + TRACE_TOTAL_SIZE, + priv->testmode_trace.cpu_addr, + priv->testmode_trace.dma_addr); + priv->testmode_trace.trace_enabled = false; + priv->testmode_trace.cpu_addr = NULL; + priv->testmode_trace.trace_addr = NULL; + priv->testmode_trace.dma_addr = 0; + } +} + + +void iwl_testmode_cleanup(struct iwl_priv *priv) +{ + iwl_trace_cleanup(priv); } /* @@ -400,6 +429,102 @@ nla_put_failure: return -EMSGSIZE; } + +/* + * This function handles the user application commands for uCode trace + * + * It retrieves command ID carried with IWL_TM_ATTR_COMMAND and calls to the + * handlers respectively. + * + * If it's an unknown commdn ID, -ENOSYS is replied; otherwise, the returned + * value of the actual command execution is replied to the user application. + * + * @hw: ieee80211_hw object that represents the device + * @tb: gnl message fields from the user space + */ +static int iwl_testmode_trace(struct ieee80211_hw *hw, struct nlattr **tb) +{ + struct iwl_priv *priv = hw->priv; + struct sk_buff *skb; + int status = 0; + struct device *dev = &priv->pci_dev->dev; + + switch (nla_get_u32(tb[IWL_TM_ATTR_COMMAND])) { + case IWL_TM_CMD_APP2DEV_BEGIN_TRACE: + if (priv->testmode_trace.trace_enabled) + return -EBUSY; + + priv->testmode_trace.cpu_addr = + dma_alloc_coherent(dev, + TRACE_TOTAL_SIZE, + &priv->testmode_trace.dma_addr, + GFP_KERNEL); + if (!priv->testmode_trace.cpu_addr) + return -ENOMEM; + priv->testmode_trace.trace_enabled = true; + priv->testmode_trace.trace_addr = (u8 *)PTR_ALIGN( + priv->testmode_trace.cpu_addr, 0x100); + memset(priv->testmode_trace.trace_addr, 0x03B, + TRACE_BUFF_SIZE); + skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, + sizeof(priv->testmode_trace.dma_addr) + 20); + if (!skb) { + IWL_DEBUG_INFO(priv, + "Error allocating memory\n"); + iwl_trace_cleanup(priv); + return -ENOMEM; + } + NLA_PUT(skb, IWL_TM_ATTR_TRACE_ADDR, + sizeof(priv->testmode_trace.dma_addr), + (u64 *)&priv->testmode_trace.dma_addr); + status = cfg80211_testmode_reply(skb); + if (status < 0) { + IWL_DEBUG_INFO(priv, + "Error sending msg : %d\n", + status); + } + break; + + case IWL_TM_CMD_APP2DEV_END_TRACE: + iwl_trace_cleanup(priv); + break; + + case IWL_TM_CMD_APP2DEV_READ_TRACE: + if (priv->testmode_trace.trace_enabled && + priv->testmode_trace.trace_addr) { + skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, + 20 + TRACE_BUFF_SIZE); + if (skb == NULL) { + IWL_DEBUG_INFO(priv, + "Error allocating memory\n"); + return -ENOMEM; + } + NLA_PUT(skb, IWL_TM_ATTR_TRACE_DATA, + TRACE_BUFF_SIZE, + priv->testmode_trace.trace_addr); + status = cfg80211_testmode_reply(skb); + if (status < 0) { + IWL_DEBUG_INFO(priv, + "Error sending msg : %d\n", status); + } + } else + return -EFAULT; + break; + + default: + IWL_DEBUG_INFO(priv, "Unknown testmode mem command ID\n"); + return -ENOSYS; + } + return status; + +nla_put_failure: + kfree_skb(skb); + if (nla_get_u32(tb[IWL_TM_ATTR_COMMAND]) == + IWL_TM_CMD_APP2DEV_BEGIN_TRACE) + iwl_trace_cleanup(priv); + return -EMSGSIZE; +} + /* The testmode gnl message handler that takes the gnl message from the * user space and parses it per the policy iwl_testmode_gnl_msg_policy, then * invoke the corresponding handlers. @@ -459,6 +584,14 @@ int iwl_testmode_cmd(struct ieee80211_hw *hw, void *data, int len) IWL_DEBUG_INFO(priv, "testmode cmd to driver\n"); result = iwl_testmode_driver(hw, tb); break; + + case IWL_TM_CMD_APP2DEV_BEGIN_TRACE: + case IWL_TM_CMD_APP2DEV_END_TRACE: + case IWL_TM_CMD_APP2DEV_READ_TRACE: + IWL_DEBUG_INFO(priv, "testmode uCode trace cmd to driver\n"); + result = iwl_testmode_trace(hw, tb); + break; + default: IWL_DEBUG_INFO(priv, "Unknown testmode command\n"); result = -ENOSYS; diff --git a/drivers/net/wireless/iwlwifi/iwl-testmode.h b/drivers/net/wireless/iwlwifi/iwl-testmode.h index 31f8949..34634ec 100644 --- a/drivers/net/wireless/iwlwifi/iwl-testmode.h +++ b/drivers/net/wireless/iwlwifi/iwl-testmode.h @@ -91,6 +91,10 @@ enum iwl_tm_cmd_t { /* if there is other new command for the driver layer operation, * append them here */ + /* commands fom user space for uCode trace operations */ + IWL_TM_CMD_APP2DEV_BEGIN_TRACE, + IWL_TM_CMD_APP2DEV_END_TRACE, + IWL_TM_CMD_APP2DEV_READ_TRACE, /* commands from kernel space to carry the synchronous response * to user application */ @@ -144,8 +148,19 @@ enum iwl_tm_attr_t { * application */ IWL_TM_ATTR_UCODE_RX_PKT, + /* When IWL_TM_ATTR_COMMAND is IWL_TM_CMD_APP2DEV_XXX_TRACE, + * The mandatory fields are: + * IWL_TM_ATTR_MEM_TRACE_ADDR for the trace address + */ + IWL_TM_ATTR_TRACE_ADDR, + IWL_TM_ATTR_TRACE_DATA, + IWL_TM_ATTR_MAX, }; +/* uCode trace buffer */ +#define TRACE_BUFF_SIZE 0x20000 +#define TRACE_BUFF_PADD 0x2000 +#define TRACE_TOTAL_SIZE (TRACE_BUFF_SIZE + TRACE_BUFF_PADD) #endif -- 2.7.4