From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4C987198E92 for ; Fri, 7 Feb 2025 23:39:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738971573; cv=none; b=MeTtL6yZCbTNsDAfCNkvK/hXFou+7+ZveX1YbecPhsuP9XJEkBlVNdGyhd6FAvaGbVM0foc/4OG+YtbhqPvA5dyffP43+RptwLdQR5zMEB1NYm4o4+dNa9LHI1p48otWHOiKKe+k8IRCPZicIqo8azsgppPIfJHR7XdCzuKUGnU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738971573; c=relaxed/simple; bh=fZTNSeEcG7n9vf1RfsOH+Fr/yWbKL6B40PWjaUxZP14=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oyWr9ZHupD+CXoy27PXqxFHYNpUl4ntNEhqXUgehPfiyawq4CmiIiR2CSxXSJRxnNBgEn5OYO6FvTdDW4sObDxsGNuuAThv2G0Sg9/F68QPI3mWTQ6oIp6rZQOg/g4jEQKrWAQc/vDBWbcv7xyIvfsbHkyLqRjBfXbWWUkkI+GU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15D96C4CED1; Fri, 7 Feb 2025 23:39:33 +0000 (UTC) From: Dave Jiang To: linux-cxl@vger.kernel.org Cc: dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, Jonathan.Cameron@huawei.com, dave@stgolabs.net, jgg@nvidia.com, shiju.jose@huawei.com Subject: [PATCH v4 11/15] cxl: Add support to handle user feature commands for get feature Date: Fri, 7 Feb 2025 16:37:51 -0700 Message-ID: <20250207233914.2375110-12-dave.jiang@intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250207233914.2375110-1-dave.jiang@intel.com> References: <20250207233914.2375110-1-dave.jiang@intel.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add helper function to parse the user data from fwctl RPC ioctl and send the parsed input parameters to cxl_get_feature() call. Reviewed-by: Jonathan Cameron Reviewed-by: Dan Williams Signed-off-by: Dave Jiang --- drivers/cxl/core/features.c | 45 +++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/drivers/cxl/core/features.c b/drivers/cxl/core/features.c index 2682067dd2d7..b359353fd4d2 100644 --- a/drivers/cxl/core/features.c +++ b/drivers/cxl/core/features.c @@ -468,6 +468,50 @@ static void *cxlctl_get_supported_features(struct cxl_features_state *cxlfs, return no_free_ptr(rpc_out); } +static void *cxlctl_get_feature(struct cxl_features_state *cxlfs, + const struct fwctl_rpc_cxl *rpc_in, + size_t *out_len) +{ + struct cxl_mailbox *cxl_mbox = &cxlfs->cxlds->cxl_mbox; + struct cxl_mbox_get_feat_in feat_in; + u16 offset, count, return_code; + size_t out_size = *out_len; + + if (rpc_in->op_size != sizeof(feat_in)) + return ERR_PTR(-EINVAL); + + if (copy_from_user(&feat_in, u64_to_user_ptr(rpc_in->in_payload), + rpc_in->op_size)) + return ERR_PTR(-EFAULT); + + offset = le16_to_cpu(feat_in.offset); + count = le16_to_cpu(feat_in.count); + + if (!count) + return ERR_PTR(-EINVAL); + + struct fwctl_rpc_cxl_out *rpc_out __free(kvfree) = + kvzalloc(out_size, GFP_KERNEL); + if (!rpc_out) + return ERR_PTR(-ENOMEM); + + out_size = cxl_get_feature(cxl_mbox, &feat_in.uuid, + feat_in.selection, rpc_out->payload, + count, offset, &return_code); + *out_len = sizeof(struct fwctl_rpc_cxl_out); + if (!out_size) { + rpc_out->size = 0; + rpc_out->retval = return_code; + return no_free_ptr(rpc_out); + } + + rpc_out->size = out_size; + rpc_out->retval = CXL_MBOX_CMD_RC_SUCCESS; + *out_len += out_size; + + return no_free_ptr(rpc_out); +} + static bool cxlctl_validate_set_features(struct cxl_features_state *cxlfs, const struct fwctl_rpc_cxl *rpc_in, enum fwctl_rpc_scope scope) @@ -565,6 +609,7 @@ static void *cxlctl_handle_commands(struct cxl_features_state *cxlfs, case CXL_MBOX_OP_GET_SUPPORTED_FEATURES: return cxlctl_get_supported_features(cxlfs, rpc_in, out_len); case CXL_MBOX_OP_GET_FEATURE: + return cxlctl_get_feature(cxlfs, rpc_in, out_len); case CXL_MBOX_OP_SET_FEATURE: default: return ERR_PTR(-EOPNOTSUPP); -- 2.48.1