[PATCH v2 1/6] mfd: intel-m10-bmc: support for MAX10 BMC Security Engine
From: Russ Weight
Date: Fri Oct 02 2020 - 21:24:26 EST
Add macros and definitions required by the MAX10 BMC
Security Engine driver.
Signed-off-by: Russ Weight <russell.h.weight@xxxxxxxxx>
---
v2:
- These functions and macros were previously distributed among
the patches that needed them. They are now grouped together
in a single patch containing changes to the Intel MAX10 BMC
driver.
- Added DRBL_ prefix to some definitions
- Some address definitions were moved here from the .c files that
use them.
---
include/linux/mfd/intel-m10-bmc.h | 134 ++++++++++++++++++++++++++++++
1 file changed, 134 insertions(+)
diff --git a/include/linux/mfd/intel-m10-bmc.h b/include/linux/mfd/intel-m10-bmc.h
index c8ef2f1654a4..880f907302eb 100644
--- a/include/linux/mfd/intel-m10-bmc.h
+++ b/include/linux/mfd/intel-m10-bmc.h
@@ -13,6 +13,9 @@
#define M10BMC_SYS_BASE 0x300800
#define M10BMC_MEM_END 0x200000fc
+#define M10BMC_STAGING_BASE 0x18000000
+#define M10BMC_STAGING_SIZE 0x3800000
+
/* Register offset of system registers */
#define NIOS2_FW_VERSION 0x0
#define M10BMC_TEST_REG 0x3c
@@ -21,6 +24,88 @@
#define M10BMC_VER_PCB_INFO_MSK GENMASK(31, 24)
#define M10BMC_VER_LEGACY_INVALID 0xffffffff
+/* Secure update doorbell register, in system register region */
+#define M10BMC_DOORBELL 0x400
+
+/* Authorization Result register, in system register region */
+#define M10BMC_AUTH_RESULT 0x404
+
+/* Doorbell register fields */
+#define DRBL_RSU_REQUEST BIT(0)
+#define DRBL_RSU_PROGRESS GENMASK(7, 4)
+#define DRBL_HOST_STATUS GENMASK(11, 8)
+#define DRBL_RSU_STATUS GENMASK(23, 16)
+#define DRBL_PKVL_EEPROM_LOAD_SEC BIT(24)
+#define DRBL_PKVL1_POLL_EN BIT(25)
+#define DRBL_PKVL2_POLL_EN BIT(26)
+#define DRBL_CONFIG_SEL BIT(28)
+#define DRBL_REBOOT_REQ BIT(29)
+#define DRBL_REBOOT_DISABLED BIT(30)
+
+/* Progress states */
+#define RSU_PROG_IDLE 0x0
+#define RSU_PROG_PREPARE 0x1
+#define RSU_PROG_READY 0x3
+#define RSU_PROG_AUTHENTICATING 0x4
+#define RSU_PROG_COPYING 0x5
+#define RSU_PROG_UPDATE_CANCEL 0x6
+#define RSU_PROG_PROGRAM_KEY_HASH 0x7
+#define RSU_PROG_RSU_DONE 0x8
+#define RSU_PROG_PKVL_PROM_DONE 0x9
+
+/* Device and error states */
+#define RSU_STAT_NORMAL 0x0
+#define RSU_STAT_TIMEOUT 0x1
+#define RSU_STAT_AUTH_FAIL 0x2
+#define RSU_STAT_COPY_FAIL 0x3
+#define RSU_STAT_FATAL 0x4
+#define RSU_STAT_PKVL_REJECT 0x5
+#define RSU_STAT_NON_INC 0x6
+#define RSU_STAT_ERASE_FAIL 0x7
+#define RSU_STAT_WEAROUT 0x8
+#define RSU_STAT_NIOS_OK 0x80
+#define RSU_STAT_USER_OK 0x81
+#define RSU_STAT_FACTORY_OK 0x82
+#define RSU_STAT_USER_FAIL 0x83
+#define RSU_STAT_FACTORY_FAIL 0x84
+#define RSU_STAT_NIOS_FLASH_ERR 0x85
+#define RSU_STAT_FPGA_FLASH_ERR 0x86
+
+#define HOST_STATUS_IDLE 0x0
+#define HOST_STATUS_WRITE_DONE 0x1
+#define HOST_STATUS_ABORT_RSU 0x2
+
+#define rsu_prog(doorbell) FIELD_GET(DRBL_RSU_PROGRESS, doorbell)
+#define rsu_stat(doorbell) FIELD_GET(DRBL_RSU_STATUS, doorbell)
+
+/* interval 100ms and timeout 5s */
+#define NIOS_HANDSHAKE_INTERVAL_US (100 * 1000)
+#define NIOS_HANDSHAKE_TIMEOUT_US (5 * 1000 * 1000)
+
+/* RSU PREP Timeout (2 minutes) to erase flash staging area */
+#define RSU_PREP_INTERVAL_MS 100
+#define RSU_PREP_TIMEOUT_MS (2 * 60 * 1000)
+
+/* RSU Complete Timeout (40 minutes) for full flash update */
+#define RSU_COMPLETE_INTERVAL_MS 1000
+#define RSU_COMPLETE_TIMEOUT_MS (40 * 60 * 1000)
+
+/* Addresses for security related data in FLASH */
+#define BMC_REH_ADDR 0x17ffc004
+#define BMC_PROG_ADDR 0x17ffc000
+#define BMC_PROG_MAGIC 0x5746
+
+#define SR_REH_ADDR 0x17ffd004
+#define SR_PROG_ADDR 0x17ffd000
+#define SR_PROG_MAGIC 0x5253
+
+#define PR_REH_ADDR 0x17ffe004
+#define PR_PROG_ADDR 0x17ffe000
+#define PR_PROG_MAGIC 0x5250
+
+/* Address of inverted bit vector containing user the image FLASH count */
+#define USER_FLASH_COUNT 0x17ffb000
+
/**
* struct intel_m10bmc - Intel MAX 10 BMC parent driver data structure
* @dev: this device
@@ -35,7 +120,11 @@ struct intel_m10bmc {
* register access helper functions.
*
* m10bmc_raw_read - read m10bmc register per addr
+ * m10bmc_raw_bulk_read - bulk read max10 registers per addr
+ * m10bmc_raw_bulk_write - bulk write max10 registers per addr
+ * m10bmc_raw_update_bits - update max10 register per addr
* m10bmc_sys_read - read m10bmc system register per offset
+ * m10bmc_sys_update_bits - update max10 system register per offset
*/
static inline int
m10bmc_raw_read(struct intel_m10bmc *m10bmc, unsigned int addr,
@@ -51,6 +140,48 @@ m10bmc_raw_read(struct intel_m10bmc *m10bmc, unsigned int addr,
return ret;
}
+static inline int
+m10bmc_raw_bulk_read(struct intel_m10bmc *m10bmc, unsigned int addr,
+ void *val, size_t cnt)
+{
+ int ret;
+
+ ret = regmap_bulk_read(m10bmc->regmap, addr, val, cnt);
+ if (ret)
+ dev_err(m10bmc->dev, "fail to read raw reg %x cnt %zx: %d\n",
+ addr, cnt, ret);
+
+ return ret;
+}
+
+static inline int
+m10bmc_raw_bulk_write(struct intel_m10bmc *m10bmc, unsigned int addr,
+ void *val, size_t cnt)
+{
+ int ret;
+
+ ret = regmap_bulk_write(m10bmc->regmap, addr, val, cnt);
+ if (ret)
+ dev_err(m10bmc->dev, "fail to write raw reg %x cnt %zx: %d\n",
+ addr, cnt, ret);
+
+ return ret;
+}
+
+static inline int
+m10bmc_raw_update_bits(struct intel_m10bmc *m10bmc, unsigned int addr,
+ unsigned int msk, unsigned int val)
+{
+ int ret;
+
+ ret = regmap_update_bits(m10bmc->regmap, addr, msk, val);
+ if (ret)
+ dev_err(m10bmc->dev, "fail to update raw reg %x: %d\n",
+ addr, ret);
+
+ return ret;
+}
+
/*
* The base of the system registers could be configured by HW developers, and
* in HW SPEC, the base is not added to the addresses of the system registers.
@@ -62,4 +193,7 @@ m10bmc_raw_read(struct intel_m10bmc *m10bmc, unsigned int addr,
#define m10bmc_sys_read(m10bmc, offset, val) \
m10bmc_raw_read(m10bmc, M10BMC_SYS_BASE + (offset), val)
+#define m10bmc_sys_update_bits(m10bmc, offset, msk, val) \
+ m10bmc_raw_update_bits(m10bmc, M10BMC_SYS_BASE + (offset), msk, val)
+
#endif /* __MFD_INTEL_M10_BMC_H */
--
2.17.1