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Commit 9cedc35a authored by Michael Adisumarta's avatar Michael Adisumarta
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msm: ipa3: map ipa-uc doorbell to PCIE-SMMU-CB for RNDIS direct flowcontrol 



Map the ipa-uc flow-control doorbell to the
PCIE-SMMU-CB for TN A7 to be able to access
the Doorbell on APQ side and put in reserved2
channel scratch.

Change-Id: I3b1ffa5770d9579b1dc0ec3b04774fcf0d530921
Signed-off-by: default avatarMichael Adisumarta <madisuma@codeaurora.org>
parent 74879d9a

drivers/platform/msm/ipa/ipa_v3/ipa_mpm.c

+26 −2
Original line number Diff line number Diff line
@@ -73,6 +73,7 @@ 
#define IPA_MPM_FLOW_CTRL_ADD 1

#define IPA_MPM_FLOW_CTRL_DELETE 0

#define IPA_MPM_NUM_OF_INIT_CMD_DESC 2

#define IPA_UC_FC_DB_ADDR 0x1EC2088



enum mhip_re_type {

	MHIP_RE_XFER = 0x2,
@@ -403,6 +404,9 @@ struct ipa_mpm_context { 
	struct device *parent_pdev;

	struct ipa_smmu_cb_ctx carved_smmu_cb;

	struct device *mhi_parent_dev;

	/* for ipa_uc_fc_db*/

	phys_addr_t uc_fc_db;

	unsigned long uc_fc_db_iova;

};



#define IPA_MPM_DESC_SIZE (sizeof(struct mhi_p_desc))
@@ -2248,6 +2252,18 @@ static int ipa_mpm_mhi_probe_cb(struct mhi_device *mhi_dev, 
			ipa_mpm_ctx->dev_info.erdb_base +

			ch->chan_props.ch_ctx.erindex * 8;



		/* Map uc-db and put in reserve2 */

		if (probe_id == IPA_MPM_MHIP_CH_ID_0) {

			/* map uc-fc-mb */

			ipa_mpm_ctx->uc_fc_db_iova =

				ipa_mpm_smmu_map_doorbell(MHIP_SMMU_DOMAIN_PCIE,

				ipa_mpm_ctx->uc_fc_db);

			ch->chan_props.ch_ctx.reserved2 =

				ipa_mpm_ctx->uc_fc_db_iova;

			IPA_MPM_DBG("configure reserved2 %lx\n",

				ch->chan_props.ch_ctx.reserved2);

		}



		/* connect Host GSI pipes with MHI' protocol */

		ret = ipa_mpm_connect_mhip_gsi_pipe(ul_prod,

			probe_id, &ul_out_params);
@@ -2569,8 +2585,9 @@ static int ipa_mpm_mhi_probe_cb(struct mhi_device *mhi_dev, 
	if (probe_id == IPA_MPM_MHIP_CH_ID_0) {

		ipa_ep_idx = ipa3_get_ep_mapping(ul_prod);

		ep = &ipa3_ctx->ep[ipa_ep_idx];

		/* not enable threshold based uc-flow-control */

		ret = ipa3_uc_send_enable_flow_control(ep->gsi_chan_hdl,

			ipa3_ctx->mpm_uc_thresh);

			0);

		IPA_MPM_DBG("Updated uc threshold to %d",

			ipa3_ctx->mpm_uc_thresh);

		if (ret) {
@@ -2677,8 +2694,12 @@ static void ipa_mpm_mhi_remove_cb(struct mhi_device *mhi_dev) 
	ipa_mpm_ctx->md[mhip_idx].init_complete = false;

	mutex_unlock(&ipa_mpm_ctx->md[mhip_idx].mhi_mutex);



	if (mhip_idx == IPA_MPM_MHIP_CH_ID_0)

	if (mhip_idx == IPA_MPM_MHIP_CH_ID_0) {

		ipa3_uc_send_disable_flow_control();

		/* unmap uc-fc-mb */

		ipa_mpm_smmu_unmap_doorbell(MHIP_SMMU_DOMAIN_PCIE,

			ipa_mpm_ctx->uc_fc_db_iova);

	}



	ipa_mpm_mhip_shutdown(mhip_idx);
@@ -3176,6 +3197,9 @@ static int ipa_mpm_probe(struct platform_device *pdev) 
	ipa_mpm_ctx->dev_info.pdev = pdev;

	ipa_mpm_ctx->dev_info.dev = &pdev->dev;



	/* uc_fc_fb, might define in dtsi */

	ipa_mpm_ctx->uc_fc_db = IPA_UC_FC_DB_ADDR;



	ipa_mpm_init_mhip_channel_info();



	if (of_property_read_u32(pdev->dev.of_node, "qcom,mhi-chdb-base",