From owner-freebsd-scsi@freebsd.org Mon Jan 30 18:13:43 2017 Return-Path: Delivered-To: freebsd-scsi@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C5464CC8062 for ; Mon, 30 Jan 2017 18:13:43 +0000 (UTC) (envelope-from chuck@tuffli.net) Received: from mail-yb0-x22f.google.com (mail-yb0-x22f.google.com [IPv6:2607:f8b0:4002:c09::22f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 938D318DF for ; Mon, 30 Jan 2017 18:13:43 +0000 (UTC) (envelope-from chuck@tuffli.net) Received: by mail-yb0-x22f.google.com with SMTP id j82so99436937ybg.1 for ; Mon, 30 Jan 2017 10:13:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuffli-net.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to; bh=vxVY60me/Xi4REJLYrmzMl46hUfyoX5uRJm17l0hZbQ=; b=wbPHgqRvpQaaKZlqlY6fRiOQD5WT/0KMjtC8zOZQz8vkfRi1yDn8CTjSySvPTO5Ocy rikHM+4PvZpeARCb0c6RYOIAOt2r+YL+EtsHdMM8vjzZCsiQpGrvNaRm1DkKDcfxwhYt HCUfcMmR2jsA8Nlv9MH0U/RZb79MEKqTKskWWRlQkTuaq4jewODr/qAHbhs7VsRn95sC Iavx1UrQHkVnVuz2wbrwlRrtT44hzwTEC+UDobnb/jRi4CaPwbpW0GafwwNDqVGKitd+ tRtvVVL13eLuFH6uT1gRrU3zA4llmH5Z0WC3wsgp0tZq6xp98IzVk/Il5ZlSgfYesnlx GQuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=vxVY60me/Xi4REJLYrmzMl46hUfyoX5uRJm17l0hZbQ=; b=qySIFkTT7heamH1diOPyuQ8DLCSZ5NIjZZVJHdejkS9F6PSGzvnE4w1bu1aSD+gB3s bvg8vtsH4k78xwsWIDmY6b06TNCkyF5yp0XrqAxcL0hNjCPz9XZ7qMiDrB0dW+al9bTH yK6iVaoxrU9mD8WyQ7kNxGhixTSQ45FbYxDIUyFgwlPpxcxOmfoGx9qXDqxqEQWKMPFu f+kgvgG1CGRQZFs5LO+n88BwcrCvbXuWqm3Jf3SaYGZ8+90Pf9p6cwsT4f81HjofQB4p vXgEj4adiM4JTxgQFtgHToxH25Mk3+mwPZv7aus1x4/k0UkpkNPJUizMkHG1d99fiCBY 7wkA== X-Gm-Message-State: AIkVDXIW/ZLrl3lm5jE3kTF7Fy9ICJQIqvY5yIf5QhKE/3cSops/L3iti7vPTZWf03dXxD3sjXP90Gd4RpJaLg== X-Received: by 10.37.208.150 with SMTP id h144mr11665945ybg.154.1485800022644; Mon, 30 Jan 2017 10:13:42 -0800 (PST) MIME-Version: 1.0 Received: by 10.129.167.74 with HTTP; Mon, 30 Jan 2017 10:13:42 -0800 (PST) From: Chuck Tuffli Date: Mon, 30 Jan 2017 10:13:42 -0800 Message-ID: Subject: how to determine protocol of USB devices To: freebsd-scsi Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Jan 2017 18:13:43 -0000 I'm trying to use CAM to determine the protocol specific command to send to a given device (e.g. Inquiry for SCSI devices or Identify for SATA devices). The code works for direct attached SCSI/SATA devices, but I'm not sure what to do with USB attached devices and could use some advice. The current code sends a XPT_GET_TRAN_SETTINGS and uses the returned protocol field in the ccb_trans_settings structure. But for SATA drives connected via USB, the protocol is SCSI. Is there a way via CAM to determine that the drive is actually SATA? TIA. --chuck