diff options
| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2020-08-18 13:51:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-18 15:44:43 +0200 |
| commit | beb4e1e50311eeb65009cded71c02f3826fa314f (patch) | |
| tree | 821a63e04b573db580f09266dd886515e43d3eb2 /drivers/misc/mei/hbm.c | |
| parent | mei: hbm: add capabilities message (diff) | |
| download | linux-beb4e1e50311eeb65009cded71c02f3826fa314f.tar.xz linux-beb4e1e50311eeb65009cded71c02f3826fa314f.zip | |
mei: restrict vtag support to hbm version 2.2
The vtag allows partitioning the mei messages into virtual groups/channels.
Vtags are supported for firmwares with HBM version 2.2 and newer
and only when a firmware confirms the support via capability handshake.
This change only define vtag restrictions in order to make
the series bisectable. Everything will be enabled when driver HBM
version is set to 2.2.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200818115147.2567012-3-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/hbm.c')
| -rw-r--r-- | drivers/misc/mei/hbm.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 3a227d9363d5..0513b8a4ea88 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -342,6 +342,8 @@ static int mei_hbm_capabilities_req(struct mei_device *dev) memset(&req, 0, sizeof(req)); req.hbm_cmd = MEI_HBM_CAPABILITIES_REQ_CMD; + if (dev->hbm_f_vt_supported) + req.capability_requested[0] = HBM_CAP_VT; ret = mei_hbm_write_message(dev, &mei_hdr, &req); if (ret) { @@ -1074,6 +1076,14 @@ static void mei_hbm_config_features(struct mei_device *dev) dev->version.minor_version >= HBM_MINOR_VERSION_DR)) dev->hbm_f_dr_supported = 1; + /* VTag Support */ + dev->hbm_f_vt_supported = 0; + if (dev->version.major_version > HBM_MAJOR_VERSION_VT || + (dev->version.major_version == HBM_MAJOR_VERSION_VT && + dev->version.minor_version >= HBM_MINOR_VERSION_VT)) + dev->hbm_f_vt_supported = 1; + + /* Capability message Support */ dev->hbm_f_cap_supported = 0; if (dev->version.major_version > HBM_MAJOR_VERSION_CAP || (dev->version.major_version == HBM_MAJOR_VERSION_CAP && @@ -1112,6 +1122,7 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) struct hbm_host_enum_response *enum_res; struct hbm_dma_setup_response *dma_setup_res; struct hbm_add_client_request *add_cl_req; + struct hbm_capability_response *capability_res; int ret; struct mei_hbm_cl_cmd *cl_cmd; @@ -1214,6 +1225,10 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) return -EPROTO; } + capability_res = (struct hbm_capability_response *)mei_msg; + if (!(capability_res->capability_granted[0] & HBM_CAP_VT)) + dev->hbm_f_vt_supported = 0; + if (dev->hbm_f_dr_supported) { if (mei_dmam_ring_alloc(dev)) dev_info(dev->dev, "running w/o dma ring\n"); |