soc/intel/common/block: Move cse common functions into block/cse

This patch cleans soc/intel/{cnl, icl, tgl} by moving common
soc code into common/block/cse.

Supported SoC can select existing HECI_DISABLE_USING_SMM option to
select common cse code block to make heci function disable using
sideband interface during SMM mode at preboot envionment.

BUG=b:78109109
TEST=Able to make HECI disable in SMM mode successfully without any hang
or errors in CNL, ICL and TGL platform.

Change-Id: I22a4cc05d3967c7653d2abe2c829b4876516d179
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/26133
Reviewed-by: V Sowmya <v.sowmya@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

4 files changed, 73 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/cse/Kconfig b/src/soc/intel/common/block/cse/Kconfig
index 321d34ce61..15de0b0536 100644
--- a/src/soc/intel/common/block/cse/Kconfig
+++ b/src/soc/intel/common/block/cse/Kconfig
@@ -4,3 +4,11 @@ config SOC_INTEL_COMMON_BLOCK_CSE
 	help
 	  Driver for communication with Converged Security Engine (CSE)
 	  over Host Embedded Controller Interface (HECI)
+
+config SOC_INTEL_COMMON_BLOCK_HECI_DISABLE_IN_SMM
+	bool
+	default y if HECI_DISABLE_USING_SMM
+	select SOC_INTEL_COMMON_BLOCK_P2SB
+	help
+	  Use this config to include common CSE block to make HECI function
+	  disable in SMM mode
diff --git a/src/soc/intel/common/block/cse/Makefile.inc b/src/soc/intel/common/block/cse/Makefile.inc
index 376f00f715..90f76d59b0 100644
--- a/src/soc/intel/common/block/cse/Makefile.inc
+++ b/src/soc/intel/common/block/cse/Makefile.inc
@@ -1,3 +1,4 @@
 bootblock-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += cse.c
 romstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += cse.c
 ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += cse.c
+smm-$(CONFIG_SOC_INTEL_COMMON_BLOCK_HECI_DISABLE_IN_SMM) += disable_heci.c
diff --git a/src/soc/intel/common/block/cse/disable_heci.c b/src/soc/intel/common/block/cse/disable_heci.c
new file mode 100644
index 0000000000..f560a37e9d
--- /dev/null
+++ b/src/soc/intel/common/block/cse/disable_heci.c
@@ -0,0 +1,62 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2020 Intel Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <commonlib/helpers.h>
+#include <console/console.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <intelblocks/cse.h>
+#include <intelblocks/p2sb.h>
+#include <intelblocks/pcr.h>
+#include <soc/pci_devs.h>
+#include <soc/pcr_ids.h>
+#include <string.h>
+
+#define CSME0_FBE	0xf
+#define CSME0_BAR	0x0
+#define CSME0_FID	0xb0
+
+/* Disable HECI using Sideband interface communication */
+void heci_disable(void)
+{
+	struct pcr_sbi_msg msg = {
+		.pid = PID_CSME0,
+		.offset = 0,
+		.opcode = PCR_WRITE,
+		.is_posted = false,
+		.fast_byte_enable = CSME0_FBE,
+		.bar = CSME0_BAR,
+		.fid = CSME0_FID
+	};
+	/* Bit 0: Set to make HECI#1 Function disable */
+	uint32_t data32 = 1;
+	uint8_t response;
+	int status;
+
+	/* unhide p2sb device */
+	p2sb_unhide();
+
+	/* Send SBI command to make HECI#1 function disable */
+	status = pcr_execute_sideband_msg(&msg, &data32, &response);
+	if (status || response)
+		printk(BIOS_ERR, "Fail to make CSME function disable\n");
+
+	/* Ensure to Lock SBI interface after this command */
+	p2sb_disable_sideband_access();
+
+	/* hide p2sb device */
+	p2sb_hide();
+}
diff --git a/src/soc/intel/common/block/include/intelblocks/cse.h b/src/soc/intel/common/block/include/intelblocks/cse.h
index c597a3f46f..59ddc5b5d5 100644
--- a/src/soc/intel/common/block/include/intelblocks/cse.h
+++ b/src/soc/intel/common/block/include/intelblocks/cse.h
@@ -97,6 +97,8 @@ int heci_send_receive(const void *snd_msg, size_t snd_sz, void *rcv_msg, size_t
  * Returns 0 on failure and 1 on success.
  */
 int heci_reset(void);
+/* Disable HECI using Sideband interface communication */
+void heci_disable(void);
 
 /* Reads config value from a specified offset in the CSE PCI Config space. */
 uint32_t me_read_config32(int offset);