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Message-ID: <Y8oQzao7eIcSmiVd@yilunxu-OptiPlex-7050>
Date: Fri, 20 Jan 2023 11:55:57 +0800
From: Xu Yilun <yilun.xu@...el.com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: linux-fpga@...r.kernel.org, Wu Hao <hao.wu@...el.com>,
Tom Rix <trix@...hat.com>, Moritz Fischer <mdf@...nel.org>,
Lee Jones <lee@...nel.org>,
Matthew Gerlach <matthew.gerlach@...ux.intel.com>,
Russ Weight <russell.h.weight@...el.com>,
Tianfei zhang <tianfei.zhang@...el.com>,
Mark Brown <broonie@...nel.org>,
Marco Pagani <marpagan@...hat.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 09/11] fpga: m10bmc-sec: Make rsu status type specific
On 2023-01-16 at 12:08:43 +0200, Ilpo Järvinen wrote:
> The rsu status field moves from the doorbell register to the auth
> result register in the PMCI implementation of the MAX10 BMC. In order
> to prepare for that, refactor the sec update driver code to have a type
> specific ops that provides ->rsu_status().
>
> Co-developed-by: Tianfei zhang <tianfei.zhang@...el.com>
> Signed-off-by: Tianfei zhang <tianfei.zhang@...el.com>
> Co-developed-by: Russ Weight <russell.h.weight@...el.com>
> Signed-off-by: Russ Weight <russell.h.weight@...el.com>
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Acked-by: Xu Yilun <yilun.xu@...el.com>
> ---
> drivers/fpga/intel-m10-bmc-sec-update.c | 109 +++++++++++++++++-------
> include/linux/mfd/intel-m10-bmc.h | 1 -
> 2 files changed, 78 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/fpga/intel-m10-bmc-sec-update.c b/drivers/fpga/intel-m10-bmc-sec-update.c
> index 6e58a463619c..47c0d5c6a4a3 100644
> --- a/drivers/fpga/intel-m10-bmc-sec-update.c
> +++ b/drivers/fpga/intel-m10-bmc-sec-update.c
> @@ -14,6 +14,12 @@
> #include <linux/platform_device.h>
> #include <linux/slab.h>
>
> +struct m10bmc_sec;
> +
> +struct m10bmc_sec_ops {
> + int (*rsu_status)(struct m10bmc_sec *sec);
> +};
> +
> struct m10bmc_sec {
> struct device *dev;
> struct intel_m10bmc *m10bmc;
> @@ -21,6 +27,7 @@ struct m10bmc_sec {
> char *fw_name;
> u32 fw_name_id;
> bool cancel_request;
> + const struct m10bmc_sec_ops *ops;
> };
>
> static DEFINE_XARRAY_ALLOC(fw_upload_xa);
> @@ -251,12 +258,25 @@ 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);
> + dev_err(sec->dev, "Doorbell: 0x%08x\n", doorbell);
>
> 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 int m10bmc_sec_n3000_rsu_status(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, csr_map->doorbell, &doorbell);
> + if (ret)
> + return ret;
> +
> + return FIELD_GET(DRBL_RSU_STATUS, doorbell);
> +}
> +
> static bool rsu_status_ok(u32 status)
> {
> return (status == RSU_STAT_NORMAL ||
> @@ -279,6 +299,26 @@ static bool rsu_progress_busy(u32 progress)
> progress == RSU_PROG_PROGRAM_KEY_HASH);
> }
>
> +static int m10bmc_sec_progress_status(struct m10bmc_sec *sec, u32 *doorbell_reg,
> + u32 *progress, u32 *status)
> +{
> + const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
> + int ret;
> +
> + ret = m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, doorbell_reg);
> + if (ret)
> + return ret;
> +
> + ret = sec->ops->rsu_status(sec);
> + if (ret < 0)
> + return ret;
> +
> + *status = ret;
> + *progress = rsu_prog(*doorbell_reg);
> +
> + return 0;
> +}
> +
> static enum fw_upload_err rsu_check_idle(struct m10bmc_sec *sec)
> {
> const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
> @@ -297,18 +337,14 @@ static enum fw_upload_err rsu_check_idle(struct m10bmc_sec *sec)
> return FW_UPLOAD_ERR_NONE;
> }
>
> -static inline bool rsu_start_done(u32 doorbell)
> +static inline bool rsu_start_done(u32 doorbell_reg, u32 progress, u32 status)
> {
> - u32 status, progress;
> -
> - if (doorbell & DRBL_RSU_REQUEST)
> + if (doorbell_reg & DRBL_RSU_REQUEST)
> return false;
>
> - status = rsu_stat(doorbell);
> if (status == RSU_STAT_ERASE_FAIL || status == RSU_STAT_WEAROUT)
> return true;
>
> - progress = rsu_prog(doorbell);
> if (!rsu_progress_done(progress))
> return true;
>
> @@ -318,8 +354,8 @@ 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;
> + u32 doorbell_reg, progress, status;
> + int ret, err;
>
> ret = regmap_update_bits(sec->m10bmc->regmap,
> csr_map->base + csr_map->doorbell,
> @@ -330,26 +366,25 @@ static enum fw_upload_err rsu_update_init(struct m10bmc_sec *sec)
> if (ret)
> return FW_UPLOAD_ERR_RW_ERROR;
>
> - ret = regmap_read_poll_timeout(sec->m10bmc->regmap,
> - csr_map->base + csr_map->doorbell,
> - doorbell,
> - rsu_start_done(doorbell),
> - NIOS_HANDSHAKE_INTERVAL_US,
> - NIOS_HANDSHAKE_TIMEOUT_US);
> + ret = read_poll_timeout(m10bmc_sec_progress_status, err,
> + err < 0 || rsu_start_done(doorbell_reg, progress, status),
> + NIOS_HANDSHAKE_INTERVAL_US,
> + NIOS_HANDSHAKE_TIMEOUT_US,
> + false,
> + sec, &doorbell_reg, &progress, &status);
>
> if (ret == -ETIMEDOUT) {
> - log_error_regs(sec, doorbell);
> + log_error_regs(sec, doorbell_reg);
> return FW_UPLOAD_ERR_TIMEOUT;
> - } else if (ret) {
> + } else if (err) {
> return FW_UPLOAD_ERR_RW_ERROR;
> }
>
> - status = rsu_stat(doorbell);
> if (status == RSU_STAT_WEAROUT) {
> dev_warn(sec->dev, "Excessive flash update count detected\n");
> return FW_UPLOAD_ERR_WEAROUT;
> } else if (status == RSU_STAT_ERASE_FAIL) {
> - log_error_regs(sec, doorbell);
> + log_error_regs(sec, doorbell_reg);
> return FW_UPLOAD_ERR_HW_ERROR;
> }
>
> @@ -393,7 +428,7 @@ 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;
> + u32 doorbell_reg, status;
> int ret;
>
> ret = regmap_update_bits(sec->m10bmc->regmap,
> @@ -406,40 +441,45 @@ static enum fw_upload_err rsu_send_data(struct m10bmc_sec *sec)
>
> ret = regmap_read_poll_timeout(sec->m10bmc->regmap,
> csr_map->base + csr_map->doorbell,
> - doorbell,
> - rsu_prog(doorbell) != RSU_PROG_READY,
> + doorbell_reg,
> + rsu_prog(doorbell_reg) != RSU_PROG_READY,
> NIOS_HANDSHAKE_INTERVAL_US,
> NIOS_HANDSHAKE_TIMEOUT_US);
>
> if (ret == -ETIMEDOUT) {
> - log_error_regs(sec, doorbell);
> + log_error_regs(sec, doorbell_reg);
> return FW_UPLOAD_ERR_TIMEOUT;
> } else if (ret) {
> return FW_UPLOAD_ERR_RW_ERROR;
> }
>
> - if (!rsu_status_ok(rsu_stat(doorbell))) {
> - log_error_regs(sec, doorbell);
> + ret = sec->ops->rsu_status(sec);
> + if (ret < 0)
> + return ret;
> + status = ret;
> +
> + if (!rsu_status_ok(status)) {
> + log_error_regs(sec, doorbell_reg);
> return FW_UPLOAD_ERR_HW_ERROR;
> }
>
> return FW_UPLOAD_ERR_NONE;
> }
>
> -static int rsu_check_complete(struct m10bmc_sec *sec, u32 *doorbell)
> +static int rsu_check_complete(struct m10bmc_sec *sec, u32 *doorbell_reg)
> {
> - const struct m10bmc_csr_map *csr_map = sec->m10bmc->info->csr_map;
> + u32 progress, status;
>
> - if (m10bmc_sys_read(sec->m10bmc, csr_map->doorbell, doorbell))
> + if (m10bmc_sec_progress_status(sec, doorbell_reg, &progress, &status))
> return -EIO;
>
> - if (!rsu_status_ok(rsu_stat(*doorbell)))
> + if (!rsu_status_ok(status))
> return -EINVAL;
>
> - if (rsu_progress_done(rsu_prog(*doorbell)))
> + if (rsu_progress_done(progress))
> return 0;
>
> - if (rsu_progress_busy(rsu_prog(*doorbell)))
> + if (rsu_progress_busy(progress))
> return -EAGAIN;
>
> return -EINVAL;
> @@ -592,6 +632,10 @@ static const struct fw_upload_ops m10bmc_ops = {
> .cleanup = m10bmc_sec_cleanup,
> };
>
> +static const struct m10bmc_sec_ops m10sec_n3000_ops = {
> + .rsu_status = m10bmc_sec_n3000_rsu_status,
> +};
> +
> #define SEC_UPDATE_LEN_MAX 32
> static int m10bmc_sec_probe(struct platform_device *pdev)
> {
> @@ -607,6 +651,7 @@ static int m10bmc_sec_probe(struct platform_device *pdev)
>
> sec->dev = &pdev->dev;
> sec->m10bmc = dev_get_drvdata(pdev->dev.parent);
> + sec->ops = (struct m10bmc_sec_ops *)platform_get_device_id(pdev)->driver_data;
> dev_set_drvdata(&pdev->dev, sec);
>
> ret = xa_alloc(&fw_upload_xa, &sec->fw_name_id, sec,
> @@ -654,9 +699,11 @@ static int m10bmc_sec_remove(struct platform_device *pdev)
> static const struct platform_device_id intel_m10bmc_sec_ids[] = {
> {
> .name = "n3000bmc-sec-update",
> + .driver_data = (kernel_ulong_t)&m10sec_n3000_ops,
> },
> {
> .name = "d5005bmc-sec-update",
> + .driver_data = (kernel_ulong_t)&m10sec_n3000_ops,
> },
> { }
> };
> diff --git a/include/linux/mfd/intel-m10-bmc.h b/include/linux/mfd/intel-m10-bmc.h
> index 470dc3773c01..1f75b33240ad 100644
> --- a/include/linux/mfd/intel-m10-bmc.h
> +++ b/include/linux/mfd/intel-m10-bmc.h
> @@ -91,7 +91,6 @@
> #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)
> --
> 2.30.2
>
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