evie/android_kernel_oneplus_msm8998
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msm: ipa3: enable smart prefetch control for GPI

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Enable smart prefetch control for GPI (sys) channels.
This is done by configuring the channel scratch in GSI.

CRs-Fixed: 1000819
Change-Id: Iac1687b9b26eed715a1055cca295daa7b46f8abd
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>
This commit is contained in:
Skylar Chang 2016-04-07 11:04:03 -07:00 • committed by Jeevan Shriram
parent fe52a162c9
commit 6ff62f5f51
1 changed files with 11 additions and 0 deletions
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11
drivers/platform/msm/ipa/ipa_v3/ipa_dp.c
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@ -3573,6 +3573,7 @@ static int ipa_gsi_setup_channel(struct ipa3_ep_context *ep)
{
struct gsi_evt_ring_props gsi_evt_ring_props;
struct gsi_chan_props gsi_channel_props;
union __packed gsi_channel_scratch ch_scratch;
struct ipa_gsi_ep_config *gsi_ep_info;
dma_addr_t dma_addr;
int result;
@ -3673,6 +3674,16 @@ static int ipa_gsi_setup_channel(struct ipa3_ep_context *ep)
if (result != GSI_STATUS_SUCCESS)
goto fail_alloc_channel;
memset(&ch_scratch, 0, sizeof(ch_scratch));
ch_scratch.gpi.max_outstanding_tre = gsi_ep_info->ipa_if_tlv *
GSI_CHAN_RE_SIZE_16B;
ch_scratch.gpi.outstanding_threshold = 2 * GSI_CHAN_RE_SIZE_16B;
result = gsi_write_channel_scratch(ep->gsi_chan_hdl, ch_scratch);
if (result != GSI_STATUS_SUCCESS) {
IPAERR("failed to write scratch %d\n", result);
goto fail_start_channel;
}
result = gsi_start_channel(ep->gsi_chan_hdl);
if (result != GSI_STATUS_SUCCESS)
goto fail_start_channel;