Merge "msm: kernel: rndis_ipa: data path packet dump" (69556ccb) · Commits · e / devices / samsung / android_kernel_samsung_msm8916

drivers/net/ethernet/msm/rndis_ipa.c

+50 −0

Original line number	Diff line number	Diff line
		@@ -154,8 +154,10 @@ struct rndis_loopback_pipe {
		* @directory: debugfs directory for various debugging switches
		* @tx_filter: flag that enable/disable Tx path to continue to IPA
		* @tx_dropped: number of filtered out Tx packets
		* @tx_dump_enable: dump all Tx packets
		* @rx_filter: flag that enable/disable Rx path to continue to IPA
		* @rx_dropped: number of filtered out Rx packets
		* @rx_dump_enable: dump all Rx packets
		* @icmp_filter: allow all ICMP packet to pass through the filters
		* @rm_enable: flag that enable/disable Resource manager request prior to Tx
		* @loopback_enable: flag that enable/disable USB stub loopback
		@@ -180,8 +182,10 @@ struct rndis_ipa_dev {
		struct net_device *net;
		u32 tx_filter;
		u32 tx_dropped;
		u32 tx_dump_enable;
		u32 rx_filter;
		u32 rx_dropped;
		u32 rx_dump_enable;
		u32 icmp_filter;
		u32 rm_enable;
		bool loopback_enable;
		@@ -270,6 +274,7 @@ static ssize_t rndis_ipa_debugfs_loopback_read(struct file *file,
		char __user ubuf, size_t count, loff_t ppos);
		static ssize_t rndis_ipa_debugfs_atomic_read(struct file *file,
		char __user ubuf, size_t count, loff_t ppos);
		static void rndis_ipa_dump_skb(struct sk_buff *skb);
		static int rndis_ipa_debugfs_init(struct rndis_ipa_dev *rndis_ipa_ctx);
		static void rndis_ipa_debugfs_destroy(struct rndis_ipa_dev *rndis_ipa_ctx);
		static int rndis_ipa_ep_registers_cfg(u32 usb_to_ipa_hdl,
		@@ -473,6 +478,8 @@ int rndis_ipa_init(struct ipa_usb_init_params *params)
		rndis_ipa_ctx->rm_enable = false;
		rndis_ipa_ctx->tx_dropped = 0;
		rndis_ipa_ctx->rx_dropped = 0;
		rndis_ipa_ctx->tx_dump_enable = false;
		rndis_ipa_ctx->rx_dump_enable = false;
		rndis_ipa_ctx->outstanding_high = DEFAULT_OUTSTANDING_HIGH;
		rndis_ipa_ctx->outstanding_low = DEFAULT_OUTSTANDING_LOW;
		atomic_set(&rndis_ipa_ctx->outstanding_pkts, 0);
		@@ -747,6 +754,9 @@ static netdev_tx_t rndis_ipa_start_xmit(struct sk_buff *skb,
		goto out;
		}

		if (unlikely(rndis_ipa_ctx->tx_dump_enable))
		rndis_ipa_dump_skb(skb);

		if (unlikely(rndis_ipa_ctx->state != RNDIS_IPA_CONNECTED_AND_UP)) {
		RNDIS_IPA_ERROR("Missing pipe connected and/or iface up\n");
		return -NETDEV_TX_BUSY;
		@@ -820,6 +830,9 @@ static void rndis_ipa_tx_complete_notify(void *private,

		NULL_CHECK_NO_RETVAL(private);

		RNDIS_IPA_DEBUG("packet Tx-complete, len=%d, skb->protocol=%d",
		skb->len, skb->protocol);

		if (unlikely((evt != IPA_WRITE_DONE))) {
		RNDIS_IPA_ERROR("unsupported event on TX call-back\n");
		return;
		@@ -929,6 +942,9 @@ static void rndis_ipa_packet_receive_notify(void *private,
		RNDIS_IPA_DEBUG("packet Rx, len=%d",
		skb->len);

		if (unlikely(rndis_ipa_ctx->rx_dump_enable))
		rndis_ipa_dump_skb(skb);

		if (unlikely(rndis_ipa_ctx->state != RNDIS_IPA_CONNECTED_AND_UP)) {
		RNDIS_IPA_DEBUG("use connect()/up() before receive()\n");
		RNDIS_IPA_DEBUG("packet dropped (length=%d)\n",
		@@ -1752,6 +1768,24 @@ static const char *rndis_ipa_state_string(enum rndis_ipa_state state)
		}
		}

		static void rndis_ipa_dump_skb(struct sk_buff *skb)
		{
		int i;
		u32 cur = (u32 )skb->data;
		u8 *byte;

		RNDIS_IPA_DEBUG("packet dump start for skb->len=%d\n",
		skb->len);

		for (i = 0; i < (skb->len/4); i++) {
		byte = (u8 *)(cur + i);
		pr_info("%2d %08x %02x %02x %02x %02x\n",
		i, *(cur + i),
		byte[0], byte[1], byte[2], byte[3]);
		}
		RNDIS_IPA_DEBUG("packet dump ended for skb->len=%d\n",
		skb->len);
		}

		/**
		* Creates the root folder for the driver
		@@ -1909,6 +1943,22 @@ static int rndis_ipa_debugfs_init(struct rndis_ipa_dev *rndis_ipa_ctx)
		goto fail_file;
		}

		file = debugfs_create_bool("tx_dump_enable", flags_read_write,
		rndis_ipa_ctx->directory,
		&rndis_ipa_ctx->tx_dump_enable);
		if (!file) {
		RNDIS_IPA_ERROR("fail to create tx_dump_enable file\n");
		goto fail_file;
		}

		file = debugfs_create_bool("rx_dump_enable", flags_read_write,
		rndis_ipa_ctx->directory,
		&rndis_ipa_ctx->rx_dump_enable);
		if (!file) {
		RNDIS_IPA_ERROR("fail to create rx_dump_enable file\n");
		goto fail_file;
		}

		RNDIS_IPA_LOG_EXIT();

		return 0;