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Commit dd984e87 authored by Jinesh K. Jayakumar's avatar Jinesh K. Jayakumar
Browse files

msm: ipa: Enable support for bandwidth voting 



Enable support for bandwidth voting in IPA offload sub-system based on
link speed of managed ethernet devices.

CRs-Fixed: 2369661
Change-Id: Ibd2d8dc8d002e87a6a8ac51ef547c4d75c1b1600
Signed-off-by: default avatarJinesh K. Jayakumar <jineshk@codeaurora.org>
parent 005f8763

drivers/platform/msm/ipa/ipa_v3/ethernet/ipa_eth_pm.c

+29 −1
Original line number Diff line number Diff line
@@ -10,9 +10,12 @@ 
 * GNU General Public License for more details.

 */



#include <linux/ethtool.h>



#include "ipa_eth_i.h"



#define IPA_ETH_MIN_BW_MBPS 1

#define IPA_ETH_MAX_BW_MBPS 100000



static void ipa_eth_pm_callback(void *arg, enum ipa_pm_cb_event event)

{
@@ -92,10 +95,35 @@ int ipa_eth_pm_deactivate(struct ipa_eth_device *eth_dev) 
	return ipa_pm_deactivate_sync(eth_dev->pm_handle);

}



static u32 __fetch_ethtool_link_speed(struct ipa_eth_device *eth_dev)

{

	int rc;

	struct ethtool_link_ksettings link_ksettings;



	rc = __ethtool_get_link_ksettings(eth_dev->net_dev, &link_ksettings);

	if (rc) {

		ipa_eth_dev_err(eth_dev,

			"Failed to obtain link settings via ethtool");

		return 0;

	}



	return link_ksettings.base.speed;

}



int ipa_eth_pm_vote_bw(struct ipa_eth_device *eth_dev)

{

	u32 link_speed;

	int throughput;



	if (!ipa_pm_is_used())

		return 0;



	return ipa_pm_set_throughput(eth_dev->pm_handle, IPA_ETH_MIN_BW_MBPS);

	link_speed = __fetch_ethtool_link_speed(eth_dev);

	throughput = clamp_val(link_speed,

				IPA_ETH_MIN_BW_MBPS, IPA_ETH_MAX_BW_MBPS);



	ipa_eth_dev_log(eth_dev, "Link speed is %u, setting throughput as %d",

			link_speed, throughput);



	return ipa_pm_set_throughput(eth_dev->pm_handle, throughput);

}