From c2bd9fc13d0ca1926bfd8b8e6d88f93d84a51f2a Mon Sep 17 00:00:00 2001
From: Tomas Winkler <tomas.winkler@intel.com>
Date: Tue, 31 Jul 2018 09:35:36 +0300
Subject: [PATCH] mei: restrict dma ring support to hbm version 2.1
Only a firmware with version 2.1 and above supports dma ring feature.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/misc/mei/debugfs.c | 2 ++
drivers/misc/mei/hbm.c | 6 ++++++
drivers/misc/mei/hw.h | 6 ++++++
drivers/misc/mei/mei_dev.h | 2 ++
4 files changed, 16 insertions(+)
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index c815da91089c7..7b5df8fd6c5ad 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -183,6 +183,8 @@ static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
dev->hbm_f_fa_supported);
pos += scnprintf(buf + pos, bufsz - pos, "\tOS: %01d\n",
dev->hbm_f_os_supported);
+ pos += scnprintf(buf + pos, bufsz - pos, "\tDR: %01d\n",
+ dev->hbm_f_dr_supported);
}
pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n",
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index b0086c4aefe4b..09e233d4c0de3 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -1007,6 +1007,12 @@ static void mei_hbm_config_features(struct mei_device *dev)
/* OS ver message Support */
if (dev->version.major_version >= HBM_MAJOR_VERSION_OS)
dev->hbm_f_os_supported = 1;
+
+ /* DMA Ring Support */
+ if (dev->version.major_version > HBM_MAJOR_VERSION_DR ||
+ (dev->version.major_version == HBM_MAJOR_VERSION_DR &&
+ dev->version.minor_version >= HBM_MINOR_VERSION_DR))
+ dev->hbm_f_dr_supported = 1;
}
/**
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index 5fb8844a6db54..65655925791ab 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -80,6 +80,12 @@
#define HBM_MINOR_VERSION_OS 0
#define HBM_MAJOR_VERSION_OS 2
+/*
+ * MEI version with dma ring support
+ */
+#define HBM_MINOR_VERSION_DR 1
+#define HBM_MAJOR_VERSION_DR 2
+
/* Host bus message command opcode */
#define MEI_HBM_CMD_OP_MSK 0x7f
/* Host bus message command RESPONSE */
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 975afaa38a66c..377397e1b5a5b 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -418,6 +418,7 @@ struct mei_fw_version {
* @hbm_f_fa_supported : hbm feature fixed address client
* @hbm_f_ie_supported : hbm feature immediate reply to enum request
* @hbm_f_os_supported : hbm feature support OS ver message
+ * @hbm_f_dr_supported : hbm feature dma ring supported
*
* @fw_ver : FW versions
*
@@ -495,6 +496,7 @@ struct mei_device {
unsigned int hbm_f_fa_supported:1;
unsigned int hbm_f_ie_supported:1;
unsigned int hbm_f_os_supported:1;
+ unsigned int hbm_f_dr_supported:1;
struct mei_fw_version fw_ver[MEI_MAX_FW_VER_BLOCKS];
--
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