Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking changes from David Miller:

 1) GRE now works over ipv6, from Dmitry Kozlov.

 2) Make SCTP more network namespace aware, from Eric Biederman.

 3) TEAM driver now works with non-ethernet devices, from Jiri Pirko.

 4) Make openvswitch network namespace aware, from Pravin B Shelar.

 5) IPV6 NAT implementation, from Patrick McHardy.

 6) Server side support for TCP Fast Open, from Jerry Chu and others.

 7) Packet BPF filter supports MOD and XOR, from Eric Dumazet and Daniel
    Borkmann.

 8) Increate the loopback default MTU to 64K, from Eric Dumazet.

 9) Use a per-task rather than per-socket page fragment allocator for
    outgoing networking traffic.  This benefits processes that have very
    many mostly idle sockets, which is quite common.

    From Eric Dumazet.

10) Use up to 32K for page fragment allocations, with fallbacks to
    smaller sizes when higher order page allocations fail.  Benefits are
    a) less segments for driver to process b) less calls to page
    allocator c) less waste of space.

    From Eric Dumazet.

11) Allow GRO to be used on GRE tunnels, from Eric Dumazet.

12) VXLAN device driver, one way to handle VLAN issues such as the
    limitation of 4096 VLAN IDs yet still have some level of isolation.
    From Stephen Hemminger.

13) As usual there is a large boatload of driver changes, with the scale
    perhaps tilted towards the wireless side this time around.

Fix up various fairly trivial conflicts, mostly caused by the user
namespace changes.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1012 commits)
  hyperv: Add buffer for extended info after the RNDIS response message.
  hyperv: Report actual status in receive completion packet
  hyperv: Remove extra allocated space for recv_pkt_list elements
  hyperv: Fix page buffer handling in rndis_filter_send_request()
  hyperv: Fix the missing return value in rndis_filter_set_packet_filter()
  hyperv: Fix the max_xfer_size in RNDIS initialization
  vxlan: put UDP socket in correct namespace
  vxlan: Depend on CONFIG_INET
  sfc: Fix the reported priorities of different filter types
  sfc: Remove EFX_FILTER_FLAG_RX_OVERRIDE_IP
  sfc: Fix loopback self-test with separate_tx_channels=1
  sfc: Fix MCDI structure field lookup
  sfc: Add parentheses around use of bitfield macro arguments
  sfc: Fix null function pointer in efx_sriov_channel_type
  vxlan: virtual extensible lan
  igmp: export symbol ip_mc_leave_group
  netlink: add attributes to fdb interface
  tg3: unconditionally select HWMON support when tg3 is enabled.
  Revert "net: ti cpsw ethernet: allow reading phy interface mode from DT"
  gre: fix sparse warning
  ...

1 files changed, 133 insertions, 34 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-drv.c b/drivers/net/wireless/iwlwifi/iwl-drv.c
index cc41cfaedfbd..198634b75ed0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-drv.c
+++ b/drivers/net/wireless/iwlwifi/iwl-drv.c
@@ -64,6 +64,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/firmware.h>
 #include <linux/module.h>
+#include <linux/vmalloc.h>
 
 #include "iwl-drv.h"
 #include "iwl-debug.h"
@@ -101,6 +102,10 @@ MODULE_VERSION(DRV_VERSION);
 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
 MODULE_LICENSE("GPL");
 
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+static struct dentry *iwl_dbgfs_root;
+#endif
+
 /**
  * struct iwl_drv - drv common data
  * @list: list of drv structures using this opmode
@@ -126,6 +131,12 @@ struct iwl_drv {
 	char firmware_name[25];         /* name of firmware file to load */
 
 	struct completion request_firmware_complete;
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	struct dentry *dbgfs_drv;
+	struct dentry *dbgfs_trans;
+	struct dentry *dbgfs_op_mode;
+#endif
 };
 
 #define DVM_OP_MODE	0
@@ -154,10 +165,8 @@ struct fw_sec {
 
 static void iwl_free_fw_desc(struct iwl_drv *drv, struct fw_desc *desc)
 {
-	if (desc->v_addr)
-		dma_free_coherent(drv->trans->dev, desc->len,
-				  desc->v_addr, desc->p_addr);
-	desc->v_addr = NULL;
+	vfree(desc->data);
+	desc->data = NULL;
 	desc->len = 0;
 }
 
@@ -176,25 +185,29 @@ static void iwl_dealloc_ucode(struct iwl_drv *drv)
 }
 
 static int iwl_alloc_fw_desc(struct iwl_drv *drv, struct fw_desc *desc,
-		      struct fw_sec *sec)
+			     struct fw_sec *sec)
 {
-	if (!sec || !sec->size) {
-		desc->v_addr = NULL;
+	void *data;
+
+	desc->data = NULL;
+
+	if (!sec || !sec->size)
 		return -EINVAL;
-	}
 
-	desc->v_addr = dma_alloc_coherent(drv->trans->dev, sec->size,
-					  &desc->p_addr, GFP_KERNEL);
-	if (!desc->v_addr)
+	data = vmalloc(sec->size);
+	if (!data)
 		return -ENOMEM;
 
 	desc->len = sec->size;
 	desc->offset = sec->offset;
-	memcpy(desc->v_addr, sec->data, sec->size);
+	memcpy(data, sec->data, desc->len);
+	desc->data = data;
+
 	return 0;
 }
 
-static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context);
+static void iwl_req_fw_callback(const struct firmware *ucode_raw,
+				void *context);
 
 #define UCODE_EXPERIMENTAL_INDEX	100
 #define UCODE_EXPERIMENTAL_TAG		"exp"
@@ -231,7 +244,7 @@ static int iwl_request_firmware(struct iwl_drv *drv, bool first)
 
 	return request_firmware_nowait(THIS_MODULE, 1, drv->firmware_name,
 				       drv->trans->dev,
-				       GFP_KERNEL, drv, iwl_ucode_callback);
+				       GFP_KERNEL, drv, iwl_req_fw_callback);
 }
 
 struct fw_img_parsing {
@@ -759,13 +772,57 @@ static int validate_sec_sizes(struct iwl_drv *drv,
 	return 0;
 }
 
+static struct iwl_op_mode *
+_iwl_op_mode_start(struct iwl_drv *drv, struct iwlwifi_opmode_table *op)
+{
+	const struct iwl_op_mode_ops *ops = op->ops;
+	struct dentry *dbgfs_dir = NULL;
+	struct iwl_op_mode *op_mode = NULL;
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	drv->dbgfs_op_mode = debugfs_create_dir(op->name,
+						drv->dbgfs_drv);
+	if (!drv->dbgfs_op_mode) {
+		IWL_ERR(drv,
+			"failed to create opmode debugfs directory\n");
+		return op_mode;
+	}
+	dbgfs_dir = drv->dbgfs_op_mode;
+#endif
+
+	op_mode = ops->start(drv->trans, drv->cfg, &drv->fw, dbgfs_dir);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	if (!op_mode) {
+		debugfs_remove_recursive(drv->dbgfs_op_mode);
+		drv->dbgfs_op_mode = NULL;
+	}
+#endif
+
+	return op_mode;
+}
+
+static void _iwl_op_mode_stop(struct iwl_drv *drv)
+{
+	/* op_mode can be NULL if its start failed */
+	if (drv->op_mode) {
+		iwl_op_mode_stop(drv->op_mode);
+		drv->op_mode = NULL;
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+		debugfs_remove_recursive(drv->dbgfs_op_mode);
+		drv->dbgfs_op_mode = NULL;
+#endif
+	}
+}
+
 /**
- * iwl_ucode_callback - callback when firmware was loaded
+ * iwl_req_fw_callback - callback when firmware was loaded
  *
  * If loaded successfully, copies the firmware into buffers
  * for the card to fetch (via DMA).
  */
-static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
+static void iwl_req_fw_callback(const struct firmware *ucode_raw, void *context)
 {
 	struct iwl_drv *drv = context;
 	struct iwl_fw *fw = &drv->fw;
@@ -908,8 +965,7 @@ static void iwl_ucode_callback(const struct firmware *ucode_raw, void *context)
 	list_add_tail(&drv->list, &op->drv);
 
 	if (op->ops) {
-		const struct iwl_op_mode_ops *ops = op->ops;
-		drv->op_mode = ops->start(drv->trans, drv->cfg, &drv->fw);
+		drv->op_mode = _iwl_op_mode_start(drv, op);
 
 		if (!drv->op_mode) {
 			mutex_unlock(&iwlwifi_opmode_table_mtx);
@@ -969,24 +1025,51 @@ struct iwl_drv *iwl_drv_start(struct iwl_trans *trans,
 	init_completion(&drv->request_firmware_complete);
 	INIT_LIST_HEAD(&drv->list);
 
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	/* Create the device debugfs entries. */
+	drv->dbgfs_drv = debugfs_create_dir(dev_name(trans->dev),
+					    iwl_dbgfs_root);
+
+	if (!drv->dbgfs_drv) {
+		IWL_ERR(drv, "failed to create debugfs directory\n");
+		goto err_free_drv;
+	}
+
+	/* Create transport layer debugfs dir */
+	drv->trans->dbgfs_dir = debugfs_create_dir("trans", drv->dbgfs_drv);
+
+	if (!drv->trans->dbgfs_dir) {
+		IWL_ERR(drv, "failed to create transport debugfs directory\n");
+		goto err_free_dbgfs;
+	}
+#endif
+
 	ret = iwl_request_firmware(drv, true);
 
 	if (ret) {
 		IWL_ERR(trans, "Couldn't request the fw\n");
-		kfree(drv);
-		drv = NULL;
+		goto err_fw;
 	}
 
 	return drv;
+
+err_fw:
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+err_free_dbgfs:
+	debugfs_remove_recursive(drv->dbgfs_drv);
+err_free_drv:
+#endif
+	kfree(drv);
+	drv = NULL;
+
+	return drv;
 }
 
 void iwl_drv_stop(struct iwl_drv *drv)
 {
 	wait_for_completion(&drv->request_firmware_complete);
 
-	/* op_mode can be NULL if its start failed */
-	if (drv->op_mode)
-		iwl_op_mode_stop(drv->op_mode);
+	_iwl_op_mode_stop(drv);
 
 	iwl_dealloc_ucode(drv);
 
@@ -1000,6 +1083,10 @@ void iwl_drv_stop(struct iwl_drv *drv)
 		list_del(&drv->list);
 	mutex_unlock(&iwlwifi_opmode_table_mtx);
 
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	debugfs_remove_recursive(drv->dbgfs_drv);
+#endif
+
 	kfree(drv);
 }
 
@@ -1022,15 +1109,18 @@ int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops)
 {
 	int i;
 	struct iwl_drv *drv;
+	struct iwlwifi_opmode_table *op;
 
 	mutex_lock(&iwlwifi_opmode_table_mtx);
 	for (i = 0; i < ARRAY_SIZE(iwlwifi_opmode_table); i++) {
-		if (strcmp(iwlwifi_opmode_table[i].name, name))
+		op = &iwlwifi_opmode_table[i];
+		if (strcmp(op->name, name))
 			continue;
-		iwlwifi_opmode_table[i].ops = ops;
-		list_for_each_entry(drv, &iwlwifi_opmode_table[i].drv, list)
-			drv->op_mode = ops->start(drv->trans, drv->cfg,
-						  &drv->fw);
+		op->ops = ops;
+		/* TODO: need to handle exceptional case */
+		list_for_each_entry(drv, &op->drv, list)
+			drv->op_mode = _iwl_op_mode_start(drv, op);
+
 		mutex_unlock(&iwlwifi_opmode_table_mtx);
 		return 0;
 	}
@@ -1051,12 +1141,9 @@ void iwl_opmode_deregister(const char *name)
 		iwlwifi_opmode_table[i].ops = NULL;
 
 		/* call the stop routine for all devices */
-		list_for_each_entry(drv, &iwlwifi_opmode_table[i].drv, list) {
-			if (drv->op_mode) {
-				iwl_op_mode_stop(drv->op_mode);
-				drv->op_mode = NULL;
-			}
-		}
+		list_for_each_entry(drv, &iwlwifi_opmode_table[i].drv, list)
+			_iwl_op_mode_stop(drv);
+
 		mutex_unlock(&iwlwifi_opmode_table_mtx);
 		return;
 	}
@@ -1076,6 +1163,14 @@ static int __init iwl_drv_init(void)
 	pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
 	pr_info(DRV_COPYRIGHT "\n");
 
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	/* Create the root of iwlwifi debugfs subsystem. */
+	iwl_dbgfs_root = debugfs_create_dir(DRV_NAME, NULL);
+
+	if (!iwl_dbgfs_root)
+		return -EFAULT;
+#endif
+
 	return iwl_pci_register_driver();
 }
 module_init(iwl_drv_init);
@@ -1083,6 +1178,10 @@ module_init(iwl_drv_init);
 static void __exit iwl_drv_exit(void)
 {
 	iwl_pci_unregister_driver();
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	debugfs_remove_recursive(iwl_dbgfs_root);
+#endif
 }
 module_exit(iwl_drv_exit);