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Commit a1b21049 authored by Ghanim Fodi's avatar Ghanim Fodi
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msm: ipa3: Flush Filtering and Routing cache on SSR event 



As part of SSR logic, APPS cleans Q6 Filtering and Routing
tables so they point to empty tables.
At IPA3 connection cache is stored at IPA H/W so packets
may get rule hit at the cache and bypass the rules scan.
Flushing the cache is needed to ensure handling integrity.

CRs-Fixed: 1007738
Change-Id: I80e16f8cd449f6183810304bd92cc5f302125237
Signed-off-by: default avatarGhanim Fodi <gfodi@codeaurora.org>
parent 0579c67d

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

+29 −0
Original line number Diff line number Diff line
@@ -1652,6 +1652,9 @@ static u32 ipa3_get_max_flt_rt_cmds(u32 num_pipes) 
	max_cmds += ((IPA_MEM_PART(v6_modem_rt_index_hi) -

		     IPA_MEM_PART(v6_modem_rt_index_lo) + 1) * 2);



	/* One cmd for Hash flushing */

	max_cmds++;



	return max_cmds;

}
@@ -1660,11 +1663,14 @@ static int ipa3_q6_clean_q6_tables(void) 
	struct ipa3_desc *desc;

	struct ipahal_imm_cmd_dma_shared_mem cmd;

	struct ipahal_imm_cmd_pyld **cmd_pyld;

	struct ipahal_imm_cmd_register_write reg_write_cmd = {0};

	int pipe_idx;

	int num_cmds = 0;

	int index;

	int retval;

	struct ipa3_mem_buffer mem = { 0 };

	struct ipahal_reg_fltrt_hash_flush flush;

	struct ipahal_reg_valmask valmask;

	u64 *entry;

	u32 max_cmds = ipa3_get_max_flt_rt_cmds(ipa3_ctx->ipa_num_pipes);

	int flt_idx = 0;
@@ -1695,6 +1701,29 @@ static int ipa3_q6_clean_q6_tables(void) 
		goto bail_desc;

	}



	flush.v4_flt = true;

	flush.v4_rt = true;

	flush.v6_flt = true;

	flush.v6_rt = true;

	ipahal_get_fltrt_hash_flush_valmask(&flush, &valmask);

	reg_write_cmd.skip_pipeline_clear = false;

	reg_write_cmd.pipeline_clear_options = IPAHAL_HPS_CLEAR;

	reg_write_cmd.offset = ipahal_get_reg_ofst(IPA_FILT_ROUT_HASH_FLUSH);

	reg_write_cmd.value = valmask.val;

	reg_write_cmd.value_mask = valmask.mask;

	cmd_pyld[num_cmds] = ipahal_construct_imm_cmd(

		IPA_IMM_CMD_REGISTER_WRITE, &reg_write_cmd, false);

	if (!cmd_pyld[num_cmds]) {

		IPAERR("fail construct register_write imm cmd\n");

		goto bail_cmd;

	}

	desc[num_cmds].opcode =

		ipahal_imm_cmd_get_opcode(IPA_IMM_CMD_REGISTER_WRITE);

	desc[num_cmds].pyld = cmd_pyld[num_cmds]->data;

	desc[num_cmds].len = cmd_pyld[num_cmds]->len;

	desc[num_cmds].type = IPA_IMM_CMD_DESC;

	num_cmds++;



	/*

	 * Iterating over all the filtering pipes which are

	 * either invalid but connected or connected but not configured by AP.