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Commit 99c3e9ac authored by Ravi Gummadidala's avatar Ravi Gummadidala
Browse files

msm: ipa: optimize cpu usage 



Use additional interrupt mitigation techniques on top of
aggregation to reduce interrupt frequency. Also, increase
size of buffer pool on LAN (and WAN) input pipes. These
changes improve throughput for WLAN STA to APPS use-cases.

Change-Id: I25a7ed77a4cd282ca27f886908dbcb2598baae44
Signed-off-by: default avatarRavi Gummadidala <rgummadi@codeaurora.org>
parent c4251672

drivers/platform/msm/ipa/ipa_dp.c

+11 −6
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ 
	list_entry(pos->member.next, typeof(*pos), member)

#define IPA_LAST_DESC_CNT 0xFFFF

#define POLLING_INACTIVITY_RX 40

#define POLLING_MIN_SLEEP_RX 950

#define POLLING_MIN_SLEEP_RX 1010

#define POLLING_MAX_SLEEP_RX 1050

#define POLLING_INACTIVITY_TX 40

#define POLLING_MIN_SLEEP_TX 400
@@ -31,7 +31,7 @@ 
#define IPA_GENERIC_AGGR_BYTE_LIMIT 6

#define IPA_GENERIC_AGGR_TIME_LIMIT 1

#define IPA_GENERIC_AGGR_PKT_LIMIT 0

#define IPA_GENERIC_RX_POOL_SZ 7

#define IPA_GENERIC_RX_POOL_SZ 32

/* 8K less the headroom (NET_SKB_PAD) and skb_shared_info which are implicitly

 * part of the data buffer */

#define IPA_LAN_RX_BUFF_SZ 7936
@@ -2044,7 +2044,7 @@ static void ipa_wq_rx_avail(struct work_struct *work) 
 *

 * This function defer the work for this event to a workqueue.

 */

static void ipa_sps_irq_rx_no_aggr_notify(struct sps_event_notify *notify)

void ipa_sps_irq_rx_no_aggr_notify(struct sps_event_notify *notify)

{

	struct ipa_rx_pkt_wrapper *rx_pkt;
@@ -2124,13 +2124,18 @@ static int ipa_assign_policy(struct ipa_sys_connect_params *in, 
					ipa_sps_irq_tx_no_aggr_notify;

			}

		} else {

			sys->policy = IPA_POLICY_INTR_MODE;

			sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT);

			sys->sps_callback = ipa_sps_irq_rx_no_aggr_notify;

			if (in->client == IPA_CLIENT_APPS_LAN_CONS ||

			    in->client == IPA_CLIENT_APPS_WAN_CONS) {

				sys->policy = IPA_POLICY_INTR_POLL_MODE;

				sys->sps_option = (SPS_O_AUTO_ENABLE | SPS_O_EOT

						| SPS_O_ACK_TRANSFERS);

				sys->sps_callback = ipa_sps_irq_rx_notify;

				INIT_WORK(&sys->work, ipa_wq_handle_rx);

				INIT_DELAYED_WORK(&sys->switch_to_intr_work,

					switch_to_intr_rx_work_func);

				INIT_DELAYED_WORK(&sys->replenish_rx_work,

						replenish_rx_work_func);

				atomic_set(&sys->curr_polling_state, 0);

				sys->rx_buff_sz = IPA_LAN_RX_BUFF_SZ;

				sys->rx_pool_sz = IPA_GENERIC_RX_POOL_SZ;

				sys->get_skb = ipa_get_skb_ipa_rx;