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Commit c5ca6535 authored by Chinmay Agarwal's avatar Chinmay Agarwal
Browse files

Revert "drivers: rmnet_perf: Update logic for nonlinear SKBs" 



This reverts commit 72a8f8d6 .

Change-Id: Icc38d51a1a785ecfa533e4f53b312fa7016b2e11

Signed-off-by: default avatarChinmay Agarwal <chinagar@codeaurora.org>
parent 638b0c23

drivers/rmnet/perf/rmnet_perf_config.c

+19 −33
Original line number Diff line number Diff line
@@ -116,15 +116,16 @@ rmnet_perf_config_free_resources(struct rmnet_perf *perf) 
	}



	/* Free everything flow nodes currently hold */

	rmnet_perf_opt_flush_all_flow_nodes();

	rmnet_perf_opt_flush_all_flow_nodes(perf);



	/* Get rid of 64k sk_buff cache */

	rmnet_perf_config_free_64k_buffs(perf);

	/* Before we free tcp_opt's structures, make sure we arent holding

	 * any SKB's hostage

	 */

	rmnet_perf_core_free_held_skbs();

	rmnet_perf_core_free_held_skbs(perf);



	//rmnet_perf_core_timer_exit(perf->core_meta);

	/* Since we allocated in one chunk, we will also free in one chunk */

	kfree(perf);
@@ -192,11 +193,11 @@ static int rmnet_perf_config_allocate_resources(struct rmnet_perf **perf) 
		*flow_node = buffer_head;

		buffer_head += flow_node_size;

		(*flow_node)->num_pkts_held = 0;

		(*flow_node)->len = 0;

	}



	local_perf->core_meta = buffer_head;

	core_meta = local_perf->core_meta;

	//rmnet_perf_core_timer_init(core_meta);

	buffer_head += core_meta_size;



	/* Assign common (not specific to something like opt) structures */
@@ -344,18 +345,6 @@ rmnet_perf_dereg_callbacks(struct net_device *dev, 
	return return_val_final;

}



static bool rmnet_perf_config_hook_registered(void)

{

	int (*deag_entry)(struct sk_buff *skb);

	void (*frag_entry)(struct rmnet_frag_descriptor *frag_desc,

			   struct rmnet_port *port);



	deag_entry = rcu_dereference(rmnet_perf_deag_entry);

	frag_entry = rcu_dereference(rmnet_perf_desc_entry);



	return deag_entry || frag_entry;

}



/* TODO Needs modifying*/

static int rmnet_perf_config_notify_cb(struct notifier_block *nb,

				       unsigned long event, void *data)
@@ -371,12 +360,11 @@ static int rmnet_perf_config_notify_cb(struct notifier_block *nb, 
	switch (event) {

	case NETDEV_UNREGISTER:

		if (rmnet_is_real_dev_registered(dev) &&

		    rmnet_perf_config_hook_registered() &&

		    (!strncmp(dev->name, "rmnet_ipa0", 10) ||

		     !strncmp(dev->name, "rmnet_mhi0", 10))) {

		    rmnet_perf_deag_entry &&

		    !strncmp(dev->name, "rmnet_ipa0", 10)) {

			struct rmnet_perf_core_meta *core_meta =

				perf->core_meta;

			pr_info("%s(): rmnet_perf netdevice unregister\n",

			pr_err("%s(): rmnet_perf netdevice unregister\n",

			       __func__);

			return_val = rmnet_perf_dereg_callbacks(dev, core_meta);

			return_val |= rmnet_perf_netdev_down();
@@ -384,22 +372,19 @@ static int rmnet_perf_config_notify_cb(struct notifier_block *nb, 
				pr_err("%s(): Error on netdev down event\n",

				       __func__);

			RCU_INIT_POINTER(rmnet_perf_deag_entry, NULL);

			RCU_INIT_POINTER(rmnet_perf_desc_entry, NULL);

			RCU_INIT_POINTER(rmnet_perf_chain_end, NULL);

		}

		break;

	case NETDEV_REGISTER:

		pr_info("%s(): rmnet_perf netdevice register, name = %s\n",

		pr_err("%s(): rmnet_perf netdevice register, name = %s\n",

		       __func__, dev->name);

		/* Check prevents us from allocating resources for every

		 * interface

		 */

		if (!rmnet_perf_config_hook_registered() &&

		if (!rmnet_perf_deag_entry &&

		    strncmp(dev->name, "rmnet_data", 10) == 0) {

			struct rmnet_priv *priv = netdev_priv(dev);



			port = rmnet_get_port(priv->real_dev);

			return_val = rmnet_perf_netdev_up(priv->real_dev,

			return_val |= rmnet_perf_netdev_up(priv->real_dev,

							   port);

			if (return_val == RMNET_PERF_RESOURCE_MGMT_FAIL) {

				pr_err("%s(): rmnet_perf allocation "
@@ -413,9 +398,10 @@ static int rmnet_perf_config_notify_cb(struct notifier_block *nb, 
				       "failed. Continue without them\n",

					__func__);

			}

			rmnet_perf_core_set_ingress_hook();

			pr_info("%s(): rmnet_perf registered on name = %s\n",

				__func__, dev->name);

			RCU_INIT_POINTER(rmnet_perf_deag_entry,

					 rmnet_perf_core_deaggregate);

			pr_err("%s(): rmnet_perf registered on "

			       "name = %s\n", __func__, dev->name);

		}

		break;

	default:
@@ -431,13 +417,13 @@ static struct notifier_block rmnet_perf_dev_notifier __read_mostly = { 


int __init rmnet_perf_init(void)

{

	pr_info("%s(): initializing rmnet_perf\n", __func__);

	pr_err("%s(): initializing rmnet_perf\n", __func__);

	return register_netdevice_notifier(&rmnet_perf_dev_notifier);

}



void __exit rmnet_perf_exit(void)

{

	pr_info("%s(): exiting rmnet_perf\n", __func__);

	pr_err("%s(): exiting rmnet_perf\n", __func__);

	unregister_netdevice_notifier(&rmnet_perf_dev_notifier);

}

drivers/rmnet/perf/rmnet_perf_config.h

+18 −5
Original line number Diff line number Diff line
@@ -15,7 +15,6 @@ 


#include <linux/skbuff.h>

#include <../drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h>

#include <../drivers/net/ethernet/qualcomm/rmnet/rmnet_descriptor.h>

#include <../drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.h>

#include <../drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h>

#include <../drivers/net/ethernet/qualcomm/rmnet/rmnet_trace.h>
@@ -33,11 +32,25 @@ enum rmnet_perf_resource_management_e { 
};



/* rmnet based variables that we rely on*/

extern void rmnet_deliver_skb(struct sk_buff *skb, struct rmnet_port *port);

extern struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port,

						 u8 mux_id);

extern int rmnet_is_real_dev_registered(const struct net_device *real_dev);

extern void rmnet_set_skb_proto(struct sk_buff *skb);

extern int (*rmnet_perf_deag_entry)(struct sk_buff *skb);

extern void (*rmnet_perf_desc_entry)(struct rmnet_frag_descriptor *frag_desc,

				     struct rmnet_port *port);

extern void (*rmnet_perf_chain_end)(void);



extern int rmnet_map_checksum_downlink_packet(struct sk_buff *skb, u16 len);

extern struct napi_struct *get_current_napi_context(void);

//extern int napi_gro_complete(struct sk_buff *skb);



extern int rmnet_map_flow_command(struct sk_buff *skb, struct rmnet_port *port,

				bool rmnet_perf);

extern int rmnet_map_dl_ind_register(struct rmnet_port *port,

			      struct rmnet_map_dl_ind *dl_ind);

extern int rmnet_map_dl_ind_deregister(struct rmnet_port *port,

				struct rmnet_map_dl_ind *dl_ind);

extern struct rmnet_port *rmnet_get_port(struct net_device *real_dev);

extern void rmnet_map_cmd_init(struct rmnet_port *port);

extern void rmnet_map_cmd_exit(struct rmnet_port *port);



/* Function declarations */

struct rmnet_perf *rmnet_perf_config_get_perf(void);