[PATCH v2 04/11] mfd: intel-m10-bmc: Support multiple CSR register layouts

From: Ilpo Järvinen
Date: Thu Nov 17 2022 - 07:09:49 EST

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There are different addresses for the MAX10 CSR registers. Introducing
a new data structure m10bmc_csr_map for the register definition of
MAX10 CSR.

Provide the csr_map for SPI.

Co-developed-by: Tianfei zhang <tianfei.zhang@xxxxxxxxx>
Signed-off-by: Tianfei zhang <tianfei.zhang@xxxxxxxxx>
Reviewed-by: Russ Weight <russell.h.weight@xxxxxxxxx>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
---
drivers/fpga/intel-m10-bmc-sec-update.c | 73 +++++++++++++++++--------
drivers/mfd/intel-m10-bmc-core.c | 10 ++--
drivers/mfd/intel-m10-bmc-spi.c | 23 ++++++++
include/linux/mfd/intel-m10-bmc.h | 38 +++++++++++--
4 files changed, 111 insertions(+), 33 deletions(-)

diff --git a/drivers/fpga/intel-m10-bmc-sec-update.c b/drivers/fpga/intel-m10-bmc-sec-update.c
index 79d48852825e..dbe8aff95da3 100644
--- a/drivers/fpga/intel-m10-bmc-sec-update.c
+++ b/drivers/fpga/intel-m10-bmc-sec-update.c
@@ -73,16 +73,24 @@ show_root_entry_hash(struct device *dev, u32 exp_magic,
return cnt;
}

-#define DEVICE_ATTR_SEC_REH_RO(_name, _magic, _prog_addr, _reh_addr) \
+#define DEVICE_ATTR_SEC_REH_RO(_name) \
static ssize_t _name##_root_entry_hash_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
-{ return show_root_entry_hash(dev, _magic, _prog_addr, _reh_addr, buf); } \
+{ \
+ struct m10bmc_sec *sec = dev_get_drvdata(dev); \
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map; \
+ \
+ return show_root_entry_hash(dev, csr_map->_name##_magic, \
+ csr_map->_name##_prog_addr, \
+ csr_map->_name##_reh_addr, \
+ buf); \
+} \
static DEVICE_ATTR_RO(_name##_root_entry_hash)

-DEVICE_ATTR_SEC_REH_RO(bmc, BMC_PROG_MAGIC, BMC_PROG_ADDR, BMC_REH_ADDR);
-DEVICE_ATTR_SEC_REH_RO(sr, SR_PROG_MAGIC, SR_PROG_ADDR, SR_REH_ADDR);
-DEVICE_ATTR_SEC_REH_RO(pr, PR_PROG_MAGIC, PR_PROG_ADDR, PR_REH_ADDR);
+DEVICE_ATTR_SEC_REH_RO(bmc);
+DEVICE_ATTR_SEC_REH_RO(sr);
+DEVICE_ATTR_SEC_REH_RO(pr);

#define CSK_BIT_LEN 128U
#define CSK_32ARRAY_SIZE DIV_ROUND_UP(CSK_BIT_LEN, 32)
@@ -122,18 +130,25 @@ show_canceled_csk(struct device *dev, u32 addr, char *buf)
return bitmap_print_to_pagebuf(1, buf, csk_map, CSK_BIT_LEN);
}

-#define DEVICE_ATTR_SEC_CSK_RO(_name, _addr) \
+#define DEVICE_ATTR_SEC_CSK_RO(_name) \
static ssize_t _name##_canceled_csks_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
-{ return show_canceled_csk(dev, _addr, buf); } \
+{ \
+ struct m10bmc_sec *sec = dev_get_drvdata(dev); \
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map; \
+ \
+ return show_canceled_csk(dev, \
+ csr_map->_name##_prog_addr + CSK_VEC_OFFSET, \
+ buf); \
+} \
static DEVICE_ATTR_RO(_name##_canceled_csks)

#define CSK_VEC_OFFSET 0x34

-DEVICE_ATTR_SEC_CSK_RO(bmc, BMC_PROG_ADDR + CSK_VEC_OFFSET);
-DEVICE_ATTR_SEC_CSK_RO(sr, SR_PROG_ADDR + CSK_VEC_OFFSET);
-DEVICE_ATTR_SEC_CSK_RO(pr, PR_PROG_ADDR + CSK_VEC_OFFSET);
+DEVICE_ATTR_SEC_CSK_RO(bmc);
+DEVICE_ATTR_SEC_CSK_RO(sr);
+DEVICE_ATTR_SEC_CSK_RO(pr);

#define FLASH_COUNT_SIZE 4096 /* count stored as inverted bit vector */

@@ -141,6 +156,7 @@ static ssize_t flash_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct m10bmc_sec *sec = dev_get_drvdata(dev);
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
unsigned int stride, num_bits;
u8 *flash_buf;
int cnt, ret;
@@ -160,12 +176,12 @@ static ssize_t flash_count_show(struct device *dev,
if (!flash_buf)
return -ENOMEM;

- ret = regmap_bulk_read(sec->m10bmc->regmap, STAGING_FLASH_COUNT,
+ ret = regmap_bulk_read(sec->m10bmc->regmap, csr_map->rsu_update_counter,
flash_buf, FLASH_COUNT_SIZE / stride);
if (ret) {
dev_err(sec->dev,
"failed to read flash count: %x cnt %x: %d\n",
- STAGING_FLASH_COUNT, FLASH_COUNT_SIZE / stride, ret);
+ csr_map->rsu_update_counter, FLASH_COUNT_SIZE / stride, ret);
goto exit_free;
}
cnt = num_bits - bitmap_weight((unsigned long *)flash_buf, num_bits);
@@ -200,20 +216,22 @@ static const struct attribute_group *m10bmc_sec_attr_groups[] = {

static void log_error_regs(struct m10bmc_sec *sec, u32 doorbell)
{
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 auth_result;

dev_err(sec->dev, "RSU error status: 0x%08x\n", doorbell);

- if (!m10bmc_sys_read(sec->m10bmc, M10BMC_AUTH_RESULT, &auth_result))
+ if (!m10bmc_sys_read(sec->m10bmc, csr_map->auth_result, &auth_result))
dev_err(sec->dev, "RSU auth result: 0x%08x\n", auth_result);
}

static enum fw_upload_err rsu_check_idle(struct m10bmc_sec *sec)
{
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell;
int ret;

- ret = m10bmc_sys_read(sec->m10bmc, M10BMC_DOORBELL, &doorbell);
+ ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;

@@ -246,11 +264,12 @@ static inline bool rsu_start_done(u32 doorbell)

static enum fw_upload_err rsu_update_init(struct m10bmc_sec *sec)
{
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell, status;
int ret;

ret = regmap_update_bits(sec->m10bmc->regmap,
- M10BMC_SYS_BASE + M10BMC_DOORBELL,
+ csr_map->base + csr_map->doorbell,
DRBL_RSU_REQUEST | DRBL_HOST_STATUS,
DRBL_RSU_REQUEST |
FIELD_PREP(DRBL_HOST_STATUS,
@@ -259,7 +278,7 @@ static enum fw_upload_err rsu_update_init(struct m10bmc_sec *sec)
return FW_UPLOAD_ERR_RW_ERROR;

ret = regmap_read_poll_timeout(sec->m10bmc->regmap,
- M10BMC_SYS_BASE + M10BMC_DOORBELL,
+ csr_map->base + csr_map->doorbell,
doorbell,
rsu_start_done(doorbell),
NIOS_HANDSHAKE_INTERVAL_US,
@@ -286,11 +305,12 @@ static enum fw_upload_err rsu_update_init(struct m10bmc_sec *sec)

static enum fw_upload_err rsu_prog_ready(struct m10bmc_sec *sec)
{
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
unsigned long poll_timeout;
u32 doorbell, progress;
int ret;

- ret = m10bmc_sys_read(sec->m10bmc, M10BMC_DOORBELL, &doorbell);
+ ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;

@@ -300,7 +320,7 @@ static enum fw_upload_err rsu_prog_ready(struct m10bmc_sec *sec)
if (time_after(jiffies, poll_timeout))
break;

- ret = m10bmc_sys_read(sec->m10bmc, M10BMC_DOORBELL, &doorbell);
+ ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;
}
@@ -319,11 +339,12 @@ static enum fw_upload_err rsu_prog_ready(struct m10bmc_sec *sec)

static enum fw_upload_err rsu_send_data(struct m10bmc_sec *sec)
{
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell;
int ret;

ret = regmap_update_bits(sec->m10bmc->regmap,
- M10BMC_SYS_BASE + M10BMC_DOORBELL,
+ csr_map->base + csr_map->doorbell,
DRBL_HOST_STATUS,
FIELD_PREP(DRBL_HOST_STATUS,
HOST_STATUS_WRITE_DONE));
@@ -331,7 +352,7 @@ static enum fw_upload_err rsu_send_data(struct m10bmc_sec *sec)
return FW_UPLOAD_ERR_RW_ERROR;

ret = regmap_read_poll_timeout(sec->m10bmc->regmap,
- M10BMC_SYS_BASE + M10BMC_DOORBELL,
+ csr_map->base + csr_map->doorbell,
doorbell,
rsu_prog(doorbell) != RSU_PROG_READY,
NIOS_HANDSHAKE_INTERVAL_US,
@@ -360,7 +381,9 @@ static enum fw_upload_err rsu_send_data(struct m10bmc_sec *sec)

static int rsu_check_complete(struct m10bmc_sec *sec, u32 *doorbell)
{
- if (m10bmc_sys_read(sec->m10bmc, M10BMC_DOORBELL, doorbell))
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
+
+ if (m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, doorbell))
return -EIO;

switch (rsu_stat(*doorbell)) {
@@ -389,10 +412,11 @@ static int rsu_check_complete(struct m10bmc_sec *sec, u32 *doorbell)

static enum fw_upload_err rsu_cancel(struct m10bmc_sec *sec)
{
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 doorbell;
int ret;

- ret = m10bmc_sys_read(sec->m10bmc, M10BMC_DOORBELL, &doorbell);
+ ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret)
return FW_UPLOAD_ERR_RW_ERROR;

@@ -400,7 +424,7 @@ static enum fw_upload_err rsu_cancel(struct m10bmc_sec *sec)
return FW_UPLOAD_ERR_BUSY;

ret = regmap_update_bits(sec->m10bmc->regmap,
- M10BMC_SYS_BASE + M10BMC_DOORBELL,
+ csr_map->base + csr_map->doorbell,
DRBL_HOST_STATUS,
FIELD_PREP(DRBL_HOST_STATUS,
HOST_STATUS_ABORT_RSU));
@@ -445,6 +469,7 @@ static enum fw_upload_err m10bmc_sec_write(struct fw_upload *fwl, const u8 *data
u32 offset, u32 size, u32 *written)
{
struct m10bmc_sec *sec = fwl->dd_handle;
+ const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
u32 blk_size, doorbell, extra_offset;
unsigned int stride, extra = 0;
int ret;
@@ -453,7 +478,7 @@ static enum fw_upload_err m10bmc_sec_write(struct fw_upload *fwl, const u8 *data
if (sec->cancel_request)
return rsu_cancel(sec);

- ret = m10bmc_sys_read(sec->m10bmc, M10BMC_DOORBELL, &doorbell);
+ ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, &doorbell);
if (ret) {
return FW_UPLOAD_ERR_RW_ERROR;
} else if (rsu_prog(doorbell) != RSU_PROG_READY) {
diff --git a/drivers/mfd/intel-m10-bmc-core.c b/drivers/mfd/intel-m10-bmc-core.c
index 6630b81b10c4..51b78b868235 100644
--- a/drivers/mfd/intel-m10-bmc-core.c
+++ b/drivers/mfd/intel-m10-bmc-core.c
@@ -19,7 +19,7 @@ static ssize_t bmc_version_show(struct device *dev,
unsigned int val;
int ret;

- ret = m10bmc_sys_read(ddata, M10BMC_BUILD_VER, &val);
+ ret = m10bmc_sys_read(ddata, ddata->info->csr_map->build_version, &val);
if (ret)
return ret;

@@ -34,7 +34,7 @@ static ssize_t bmcfw_version_show(struct device *dev,
unsigned int val;
int ret;

- ret = m10bmc_sys_read(ddata, NIOS2_FW_VERSION, &val);
+ ret = m10bmc_sys_read(ddata, ddata->info->csr_map->fw_version, &val);
if (ret)
return ret;

@@ -49,11 +49,11 @@ static ssize_t mac_address_show(struct device *dev,
unsigned int macaddr_low, macaddr_high;
int ret;

- ret = m10bmc_sys_read(ddata, M10BMC_MAC_LOW, &macaddr_low);
+ ret = m10bmc_sys_read(ddata, ddata->info->csr_map->mac_low, &macaddr_low);
if (ret)
return ret;

- ret = m10bmc_sys_read(ddata, M10BMC_MAC_HIGH, &macaddr_high);
+ ret = m10bmc_sys_read(ddata, ddata->info->csr_map->mac_high, &macaddr_high);
if (ret)
return ret;

@@ -74,7 +74,7 @@ static ssize_t mac_count_show(struct device *dev,
unsigned int macaddr_high;
int ret;

- ret = m10bmc_sys_read(ddata, M10BMC_MAC_HIGH, &macaddr_high);
+ ret = m10bmc_sys_read(ddata, ddata->info->csr_map->mac_high, &macaddr_high);
if (ret)
return ret;

diff --git a/drivers/mfd/intel-m10-bmc-spi.c b/drivers/mfd/intel-m10-bmc-spi.c
index be1d4ddedabb..611a4ab42717 100644
--- a/drivers/mfd/intel-m10-bmc-spi.c
+++ b/drivers/mfd/intel-m10-bmc-spi.c
@@ -91,6 +91,26 @@ static int intel_m10_bmc_spi_probe(struct spi_device *spi)
return m10bmc_dev_init(ddata, info);
}

+static const struct m10bmc_csr_map m10bmc_spi_csr_map = {
+ .base = M10BMC_SYS_BASE,
+ .build_version = M10BMC_BUILD_VER,
+ .fw_version = NIOS2_FW_VERSION,
+ .mac_low = M10BMC_MAC_LOW,
+ .mac_high = M10BMC_MAC_HIGH,
+ .doorbell = M10BMC_DOORBELL,
+ .auth_result = M10BMC_AUTH_RESULT,
+ .bmc_prog_addr = BMC_PROG_ADDR,
+ .bmc_reh_addr = BMC_REH_ADDR,
+ .bmc_magic = BMC_PROG_MAGIC,
+ .sr_prog_addr = SR_PROG_ADDR,
+ .sr_reh_addr = SR_REH_ADDR,
+ .sr_magic = SR_PROG_MAGIC,
+ .pr_prog_addr = PR_PROG_ADDR,
+ .pr_reh_addr = PR_REH_ADDR,
+ .pr_magic = PR_PROG_MAGIC,
+ .rsu_update_counter = STAGING_FLASH_COUNT,
+};
+
static struct mfd_cell m10bmc_d5005_subdevs[] = {
{ .name = "d5005bmc-hwmon" },
{ .name = "d5005bmc-sec-update" },
@@ -109,16 +129,19 @@ static struct mfd_cell m10bmc_n5010_subdevs[] = {
static const struct intel_m10bmc_platform_info m10bmc_spi_n3000 = {
.cells = m10bmc_pacn3000_subdevs,
.n_cells = ARRAY_SIZE(m10bmc_pacn3000_subdevs),
+ .csr_map = &m10bmc_spi_csr_map,
};

static const struct intel_m10bmc_platform_info m10bmc_spi_d5005 = {
.cells = m10bmc_d5005_subdevs,
.n_cells = ARRAY_SIZE(m10bmc_d5005_subdevs),
+ .csr_map = &m10bmc_spi_csr_map,
};

static const struct intel_m10bmc_platform_info m10bmc_spi_n5010 = {
.cells = m10bmc_n5010_subdevs,
.n_cells = ARRAY_SIZE(m10bmc_n5010_subdevs),
+ .csr_map = &m10bmc_spi_csr_map,
};

static const struct spi_device_id m10bmc_spi_id[] = {
diff --git a/include/linux/mfd/intel-m10-bmc.h b/include/linux/mfd/intel-m10-bmc.h
index 82e0820e146e..91567375f1bf 100644
--- a/include/linux/mfd/intel-m10-bmc.h
+++ b/include/linux/mfd/intel-m10-bmc.h
@@ -118,14 +118,39 @@
/* Address of 4KB inverted bit vector containing staging area FLASH count */
#define STAGING_FLASH_COUNT 0x17ffb000

+/**
+ * struct m10bmc_csr_map - Intel MAX 10 BMC CSR register map
+ */
+struct m10bmc_csr_map {
+ unsigned int base;
+ unsigned int build_version;
+ unsigned int fw_version;
+ unsigned int mac_low;
+ unsigned int mac_high;
+ unsigned int doorbell;
+ unsigned int auth_result;
+ unsigned int bmc_prog_addr;
+ unsigned int bmc_reh_addr;
+ unsigned int bmc_magic;
+ unsigned int sr_prog_addr;
+ unsigned int sr_reh_addr;
+ unsigned int sr_magic;
+ unsigned int pr_prog_addr;
+ unsigned int pr_reh_addr;
+ unsigned int pr_magic;
+ unsigned int rsu_update_counter;
+};
+
/**
* struct intel_m10bmc_platform_info - Intel MAX 10 BMC platform specific information
* @cells: MFD cells
* @n_cells: MFD cells ARRAY_SIZE()
+ * @csr_map: the mappings for register definition of MAX10 BMC
*/
struct intel_m10bmc_platform_info {
struct mfd_cell *cells;
int n_cells;
+ const struct m10bmc_csr_map *csr_map;
};

/**
@@ -164,12 +189,17 @@ m10bmc_raw_read(struct intel_m10bmc *m10bmc, unsigned int addr,
* 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.
*
- * This macro helps to simplify the accessing of the system registers. And if
+ * This function helps to simplify the accessing of the system registers. And if
* the base is reconfigured in HW, SW developers could simply change the
- * M10BMC_SYS_BASE accordingly.
+ * csr_map's base accordingly.
*/
-#define m10bmc_sys_read(m10bmc, offset, val) \
- m10bmc_raw_read(m10bmc, M10BMC_SYS_BASE + (offset), val)
+static inline int m10bmc_sys_read(struct intel_m10bmc *m10bmc, unsigned int offset,
+ unsigned int *val)
+{
+ const struct m10bmc_csr_map *csr_map = m10bmc->info->csr_map;
+
+ return m10bmc_raw_read(m10bmc, csr_map->base + offset, val);
+}

/*
* MAX10 BMC Core support
--
2.30.2

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