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Commit a1d89b75 authored by Chaitanya Pratapa's avatar Chaitanya Pratapa
Browse files

msm: ipa: Fix updating the doobell for WDI3 



For WDI3, requirement is to ring the event ring DB
with a value outside of the ring. Currently we are taking the
event_ring_size from non SMMU structure which is incorrect.
Make a chane to use the value based on SMMU enablement.
Also make change to ring the DB with the below logic.
Event ring base addr + Event ring size + 1 element size.

Change-Id: Ie9e4cad63070d1488d0a36f9d08279d2d566055a
Signed-off-by: default avatarChaitanya Pratapa <cpratapa@codeaurora.org>
parent 942aa8f8

drivers/platform/msm/ipa/ipa_v3/ipa_wdi3_i.c

+20 −5
Original line number Diff line number Diff line
@@ -459,7 +459,7 @@ int ipa3_conn_wdi3_pipes(struct ipa_wdi_conn_in_params *in, 
	int result = 0;

	u32 gsi_db_addr_low, gsi_db_addr_high;

	void __iomem *db_addr;

	u32 evt_ring_db_addr_low, evt_ring_db_addr_high;

	u32 evt_ring_db_addr_low, evt_ring_db_addr_high, db_val = 0;



	/* wdi3 only support over gsi */

	if (!ipa3_ctx->ipa_wdi3_over_gsi) {
@@ -627,11 +627,18 @@ int ipa3_conn_wdi3_pipes(struct ipa_wdi_conn_in_params *in, 
	 * initialization of the event, with a value that is

	 * outside of the ring range. Eg: ring base = 0x1000,

	 * ring size = 0x100 => AP can write value > 0x1100

	 * into the doorbell address. Eg: 0x 1110

	 * into the doorbell address. Eg: 0x 1110.

	 * Use event ring base addr + event ring size + 1 element size.

	 */

	iowrite32(in->u_rx.rx.event_ring_size / 4 + 10, db_addr);

	db_val = (u32)ep_rx->gsi_mem_info.evt_ring_base_addr;

	db_val += ((in->is_smmu_enabled) ? in->u_rx.rx_smmu.event_ring_size :

		in->u_rx.rx.event_ring_size);

	db_val += GSI_EVT_RING_RE_SIZE_8B;

	iowrite32(db_val, db_addr);

	gsi_query_evt_ring_db_addr(ep_tx->gsi_evt_ring_hdl,

		&evt_ring_db_addr_low, &evt_ring_db_addr_high);

	IPADBG("RX base_addr 0x%x evt wp val: 0x%x\n",

		ep_rx->gsi_mem_info.evt_ring_base_addr, db_val);



	/* only 32 bit lsb is used */

	db_addr = ioremap((phys_addr_t)(evt_ring_db_addr_low), 4);
@@ -641,9 +648,17 @@ int ipa3_conn_wdi3_pipes(struct ipa_wdi_conn_in_params *in, 
	 * outside of the ring range. Eg: ring base = 0x1000,

	 * ring size = 0x100 => AP can write value > 0x1100

	 * into the doorbell address. Eg: 0x 1110

	 * Use event ring base addr + event ring size + 1 element size.

	 */

	iowrite32(in->u_tx.tx.event_ring_size / 4 + 10, db_addr);



	db_val = (u32)ep_tx->gsi_mem_info.evt_ring_base_addr;

	db_val += ((in->is_smmu_enabled) ? in->u_tx.tx_smmu.event_ring_size :

		in->u_tx.tx.event_ring_size);

	db_val += ((ipa3_ctx->ipa_hw_type >= IPA_HW_v4_9) ?

		GSI_EVT_RING_RE_SIZE_32B : GSI_EVT_RING_RE_SIZE_16B);

	iowrite32(db_val, db_addr);

	IPADBG("db_addr %u  TX base_addr 0x%x evt wp val: 0x%x\n",

		evt_ring_db_addr_low,

		ep_tx->gsi_mem_info.evt_ring_base_addr, db_val);

fail:

	IPA_ACTIVE_CLIENTS_DEC_SIMPLE();

	return result;