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firmware: Fix incompatible function behavior for RSU driver 

The older versions of remote system update (RSU) firmware don't support
retry and notify features then the kernel module dies when it queries
the RSU retry counter or performs notify operation.

Update the Intel service layer and RSU drivers to be compatible with
all versions of RSU firmware.

Reported-by: Radu Barcau <radu.bacrau@intel.com>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Richard Gong <richard.gong@intel.com>
Link: https://lore.kernel.org/r/1572884676-1385-1-git-send-email-richard.gong@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Richard Gong 2019-11-04 10:24:36 -06:00 committed by Greg Kroah-Hartman
parent c0e5f4e73a
commit e9cb0497b1
3 changed files with 43 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/firmware/stratix10-rsu.c
View File

@ -20,7 +20,6 @@
#define RSU_VERSION_MASK GENMASK_ULL(63, 32)
#define RSU_ERROR_LOCATION_MASK GENMASK_ULL(31, 0)
#define RSU_ERROR_DETAIL_MASK GENMASK_ULL(63, 32)
#define RSU_FW_VERSION_MASK GENMASK_ULL(15, 0)
#define RSU_TIMEOUT (msecs_to_jiffies(SVC_RSU_REQUEST_TIMEOUT_MS))
@ -109,9 +108,12 @@ static void rsu_command_callback(struct stratix10_svc_client *client,
{
struct stratix10_rsu_priv *priv = client->priv;
if (data->status != BIT(SVC_STATUS_RSU_OK))
dev_err(client->dev, "RSU returned status is %i\n",
data->status);
if (data->status == BIT(SVC_STATUS_RSU_NO_SUPPORT))
dev_warn(client->dev, "Secure FW doesn't support notify\n");
else if (data->status == BIT(SVC_STATUS_RSU_ERROR))
dev_err(client->dev, "Failure, returned status is %lu\n",
BIT(data->status));
complete(&priv->completion);
}
@ -133,9 +135,11 @@ static void rsu_retry_callback(struct stratix10_svc_client *client,
if (data->status == BIT(SVC_STATUS_RSU_OK))
priv->retry_counter = *counter;
else if (data->status == BIT(SVC_STATUS_RSU_NO_SUPPORT))
dev_warn(client->dev, "Secure FW doesn't support retry\n");
else
dev_err(client->dev, "Failed to get retry counter %i\n",
data->status);
dev_err(client->dev, "Failed to get retry counter %lu\n",
BIT(data->status));
complete(&priv->completion);
}
@ -333,15 +337,10 @@ static ssize_t notify_store(struct device *dev,
return ret;
}
/* only 19.3 or late version FW supports retry counter feature */
if (FIELD_GET(RSU_FW_VERSION_MASK, priv->status.version)) {
ret = rsu_send_msg(priv, COMMAND_RSU_RETRY,
0, rsu_retry_callback);
if (ret) {
dev_err(dev,
"Error, getting RSU retry %i\n", ret);
return ret;
}
ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback);
if (ret) {
dev_err(dev, "Error, getting RSU retry %i\n", ret);
return ret;
}
return count;
@ -413,15 +412,10 @@ static int stratix10_rsu_probe(struct platform_device *pdev)
stratix10_svc_free_channel(priv->chan);
}
/* only 19.3 or late version FW supports retry counter feature */
if (FIELD_GET(RSU_FW_VERSION_MASK, priv->status.version)) {
ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0,
rsu_retry_callback);
if (ret) {
dev_err(dev,
"Error, getting RSU retry %i\n", ret);
stratix10_svc_free_channel(priv->chan);
}
ret = rsu_send_msg(priv, COMMAND_RSU_RETRY, 0, rsu_retry_callback);
if (ret) {
dev_err(dev, "Error, getting RSU retry %i\n", ret);
stratix10_svc_free_channel(priv->chan);
}
return ret;

18
drivers/firmware/stratix10-svc.c
View File

@ -493,8 +493,24 @@ static int svc_normal_to_secure_thread(void *data)
pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata);
break;
default:
pr_warn("it shouldn't happen\n");
pr_warn("Secure firmware doesn't support...\n");
/*
* be compatible with older version firmware which
* doesn't support RSU notify or retry
*/
if ((pdata->command == COMMAND_RSU_RETRY) ||
(pdata->command == COMMAND_RSU_NOTIFY)) {
cbdata->status =
BIT(SVC_STATUS_RSU_NO_SUPPORT);
cbdata->kaddr1 = NULL;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
pdata->chan->scl->receive_cb(
pdata->chan->scl, cbdata);
}
break;
}
};

8
include/linux/firmware/intel/stratix10-svc-client.h
View File

@ -41,6 +41,12 @@
*
* SVC_STATUS_RSU_OK:
* Secure firmware accepts the request of remote status update (RSU).
*
* SVC_STATUS_RSU_ERROR:
* Error encountered during remote system update.
*
* SVC_STATUS_RSU_NO_SUPPORT:
* Secure firmware doesn't support RSU retry or notify feature.
*/
#define SVC_STATUS_RECONFIG_REQUEST_OK 0
#define SVC_STATUS_RECONFIG_BUFFER_SUBMITTED 1
@ -50,6 +56,8 @@
#define SVC_STATUS_RECONFIG_ERROR 5
#define SVC_STATUS_RSU_OK 6
#define SVC_STATUS_RSU_ERROR 7
#define SVC_STATUS_RSU_NO_SUPPORT 8
/**
* Flag bit for COMMAND_RECONFIG
*