From b7a4804129c7adb3ee9caf5505e3f91fb1467ec3 Mon Sep 17 00:00:00 2001 From: Alexander Usyskin Date: Sat, 6 Feb 2021 16:43:22 +0200 Subject: mei: add support for client dma capability Client DMA capability indicates whether the firmware supports setting up a direct DMA channel between the host and me client. The DMA capabilities are supported from firmware HBM version 2.2 and newer. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Link: https://lore.kernel.org/r/20210206144325.25682-3-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hbm.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'drivers/misc/mei/hbm.c') diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index df0f62de3dca..6e748da7e55d 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -339,7 +339,9 @@ 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; + req.capability_requested[0] |= HBM_CAP_VT; + if (dev->hbm_f_cd_supported) + req.capability_requested[0] |= HBM_CAP_CD; ret = mei_hbm_write_message(dev, &mei_hdr, &req); if (ret) { @@ -1085,6 +1087,13 @@ static void mei_hbm_config_features(struct mei_device *dev) (dev->version.major_version == HBM_MAJOR_VERSION_CAP && dev->version.minor_version >= HBM_MINOR_VERSION_CAP)) dev->hbm_f_cap_supported = 1; + + /* Client DMA Support */ + dev->hbm_f_cd_supported = 0; + if (dev->version.major_version > HBM_MAJOR_VERSION_CD || + (dev->version.major_version == HBM_MAJOR_VERSION_CD && + dev->version.minor_version >= HBM_MINOR_VERSION_CD)) + dev->hbm_f_cd_supported = 1; } /** @@ -1233,6 +1242,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) capability_res = (struct hbm_capability_response *)mei_msg; if (!(capability_res->capability_granted[0] & HBM_CAP_VT)) dev->hbm_f_vt_supported = 0; + if (!(capability_res->capability_granted[0] & HBM_CAP_CD)) + dev->hbm_f_cd_supported = 0; if (dev->hbm_f_dr_supported) { if (mei_dmam_ring_alloc(dev)) -- cgit v1.2.3