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![Alexander Usyskin](/assets/img/avatar_default.png)
Move PXP mode state machine to SETUP mode only if memory ready message sent successfully to the firmware. Leave it in INIT mode otherwise to allow try to send message later. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Link: https://lore.kernel.org/r/20221116124735.2493847-3-alexander.usyskin@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
584 lines
14 KiB
C
584 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2013-2022, Intel Corporation. All rights reserved.
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* Intel Management Engine Interface (Intel MEI) Linux driver
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/uuid.h>
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#include <linux/mei_cl_bus.h>
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#include "mei_dev.h"
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#include "client.h"
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#include "mkhi.h"
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#define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
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0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
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static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
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#define MEI_UUID_NFC_HCI UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
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0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)
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#define MEI_UUID_WD UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, \
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0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB)
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#define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
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0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
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#define MEI_UUID_IGSC_MKHI UUID_LE(0xE2C2AFA2, 0x3817, 0x4D19, \
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0x9D, 0x95, 0x06, 0xB1, 0x6B, 0x58, 0x8A, 0x5D)
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#define MEI_UUID_IGSC_MKHI_FIX UUID_LE(0x46E0C1FB, 0xA546, 0x414F, \
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0x91, 0x70, 0xB7, 0xF4, 0x6D, 0x57, 0xB4, 0xAD)
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#define MEI_UUID_HDCP UUID_LE(0xB638AB7E, 0x94E2, 0x4EA2, \
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0xA5, 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
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#define MEI_UUID_PAVP UUID_LE(0xfbf6fcf1, 0x96cf, 0x4e2e, 0xA6, \
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0xa6, 0x1b, 0xab, 0x8c, 0xbe, 0x36, 0xb1)
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#define MEI_UUID_ANY NULL_UUID_LE
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/**
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* number_of_connections - determine whether an client be on the bus
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* according number of connections
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* We support only clients:
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* 1. with single connection
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* 2. and fixed clients (max_number_of_connections == 0)
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*
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* @cldev: me clients device
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*/
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static void number_of_connections(struct mei_cl_device *cldev)
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{
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if (cldev->me_cl->props.max_number_of_connections > 1)
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cldev->do_match = 0;
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}
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/**
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* blacklist - blacklist a client from the bus
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*
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* @cldev: me clients device
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*/
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static void blacklist(struct mei_cl_device *cldev)
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{
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cldev->do_match = 0;
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}
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/**
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* whitelist - forcefully whitelist client
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*
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* @cldev: me clients device
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*/
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static void whitelist(struct mei_cl_device *cldev)
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{
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cldev->do_match = 1;
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}
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#define OSTYPE_LINUX 2
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struct mei_os_ver {
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__le16 build;
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__le16 reserved1;
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u8 os_type;
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u8 major;
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u8 minor;
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u8 reserved2;
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} __packed;
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struct mkhi_fw_ver_block {
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u16 minor;
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u8 major;
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u8 platform;
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u16 buildno;
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u16 hotfix;
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} __packed;
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struct mkhi_fw_ver {
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struct mkhi_fw_ver_block ver[MEI_MAX_FW_VER_BLOCKS];
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} __packed;
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#define MKHI_OSVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
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sizeof(struct mkhi_fwcaps) + \
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sizeof(struct mei_os_ver))
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static int mei_osver(struct mei_cl_device *cldev)
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{
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const size_t size = MKHI_OSVER_BUF_LEN;
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char buf[MKHI_OSVER_BUF_LEN];
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struct mkhi_msg *req;
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struct mkhi_fwcaps *fwcaps;
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struct mei_os_ver *os_ver;
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unsigned int mode = MEI_CL_IO_TX_BLOCKING | MEI_CL_IO_TX_INTERNAL;
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memset(buf, 0, size);
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req = (struct mkhi_msg *)buf;
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req->hdr.group_id = MKHI_FWCAPS_GROUP_ID;
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req->hdr.command = MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD;
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fwcaps = (struct mkhi_fwcaps *)req->data;
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fwcaps->id.rule_type = 0x0;
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fwcaps->id.feature_id = MKHI_FEATURE_PTT;
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fwcaps->len = sizeof(*os_ver);
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os_ver = (struct mei_os_ver *)fwcaps->data;
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os_ver->os_type = OSTYPE_LINUX;
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return __mei_cl_send(cldev->cl, buf, size, 0, mode);
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}
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#define MKHI_FWVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
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sizeof(struct mkhi_fw_ver))
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#define MKHI_FWVER_LEN(__num) (sizeof(struct mkhi_msg_hdr) + \
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sizeof(struct mkhi_fw_ver_block) * (__num))
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static int mei_fwver(struct mei_cl_device *cldev)
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{
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char buf[MKHI_FWVER_BUF_LEN];
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struct mkhi_msg req;
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struct mkhi_msg *rsp;
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struct mkhi_fw_ver *fwver;
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int bytes_recv, ret, i;
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memset(buf, 0, sizeof(buf));
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req.hdr.group_id = MKHI_GEN_GROUP_ID;
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req.hdr.command = MKHI_GEN_GET_FW_VERSION_CMD;
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ret = __mei_cl_send(cldev->cl, (u8 *)&req, sizeof(req), 0,
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MEI_CL_IO_TX_BLOCKING);
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if (ret < 0) {
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dev_err(&cldev->dev, "Could not send ReqFWVersion cmd\n");
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return ret;
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}
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ret = 0;
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bytes_recv = __mei_cl_recv(cldev->cl, buf, sizeof(buf), NULL, 0,
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cldev->bus->timeouts.mkhi_recv);
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if (bytes_recv < 0 || (size_t)bytes_recv < MKHI_FWVER_LEN(1)) {
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/*
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* Should be at least one version block,
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* error out if nothing found
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*/
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dev_err(&cldev->dev, "Could not read FW version\n");
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return -EIO;
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}
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rsp = (struct mkhi_msg *)buf;
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fwver = (struct mkhi_fw_ver *)rsp->data;
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memset(cldev->bus->fw_ver, 0, sizeof(cldev->bus->fw_ver));
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for (i = 0; i < MEI_MAX_FW_VER_BLOCKS; i++) {
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if ((size_t)bytes_recv < MKHI_FWVER_LEN(i + 1))
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break;
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dev_dbg(&cldev->dev, "FW version%d %d:%d.%d.%d.%d\n",
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i, fwver->ver[i].platform,
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fwver->ver[i].major, fwver->ver[i].minor,
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fwver->ver[i].hotfix, fwver->ver[i].buildno);
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cldev->bus->fw_ver[i].platform = fwver->ver[i].platform;
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cldev->bus->fw_ver[i].major = fwver->ver[i].major;
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cldev->bus->fw_ver[i].minor = fwver->ver[i].minor;
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cldev->bus->fw_ver[i].hotfix = fwver->ver[i].hotfix;
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cldev->bus->fw_ver[i].buildno = fwver->ver[i].buildno;
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}
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return ret;
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}
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#define GFX_MEMORY_READY_TIMEOUT 200 /* timeout in milliseconds */
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static int mei_gfx_memory_ready(struct mei_cl_device *cldev)
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{
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struct mkhi_gfx_mem_ready req = {0};
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unsigned int mode = MEI_CL_IO_TX_INTERNAL | MEI_CL_IO_TX_BLOCKING;
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req.hdr.group_id = MKHI_GROUP_ID_GFX;
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req.hdr.command = MKHI_GFX_MEMORY_READY_CMD_REQ;
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req.flags = MKHI_GFX_MEM_READY_PXP_ALLOWED;
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dev_dbg(&cldev->dev, "Sending memory ready command\n");
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return __mei_cl_send_timeout(cldev->cl, (u8 *)&req, sizeof(req), 0,
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mode, GFX_MEMORY_READY_TIMEOUT);
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}
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static void mei_mkhi_fix(struct mei_cl_device *cldev)
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{
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int ret;
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/* No need to enable the client if nothing is needed from it */
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if (!cldev->bus->fw_f_fw_ver_supported &&
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!cldev->bus->hbm_f_os_supported)
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return;
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ret = mei_cldev_enable(cldev);
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if (ret)
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return;
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if (cldev->bus->fw_f_fw_ver_supported) {
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ret = mei_fwver(cldev);
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if (ret < 0)
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dev_err(&cldev->dev, "FW version command failed %d\n",
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ret);
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}
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if (cldev->bus->hbm_f_os_supported) {
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ret = mei_osver(cldev);
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if (ret < 0)
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dev_err(&cldev->dev, "OS version command failed %d\n",
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ret);
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}
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mei_cldev_disable(cldev);
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}
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static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
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{
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int ret;
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/* No need to enable the client if nothing is needed from it */
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if (!cldev->bus->fw_f_fw_ver_supported)
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return;
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ret = mei_cldev_enable(cldev);
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if (ret)
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return;
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ret = mei_fwver(cldev);
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if (ret < 0)
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dev_err(&cldev->dev, "FW version command failed %d\n", ret);
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mei_cldev_disable(cldev);
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}
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static void mei_gsc_mkhi_fix_ver(struct mei_cl_device *cldev)
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{
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int ret;
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/* No need to enable the client if nothing is needed from it */
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if (!cldev->bus->fw_f_fw_ver_supported &&
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cldev->bus->pxp_mode != MEI_DEV_PXP_INIT)
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return;
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ret = mei_cldev_enable(cldev);
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if (ret)
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return;
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if (cldev->bus->pxp_mode == MEI_DEV_PXP_INIT) {
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ret = mei_gfx_memory_ready(cldev);
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if (ret < 0) {
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dev_err(&cldev->dev, "memory ready command failed %d\n", ret);
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} else {
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dev_dbg(&cldev->dev, "memory ready command sent\n");
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cldev->bus->pxp_mode = MEI_DEV_PXP_SETUP;
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}
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/* we go to reset after that */
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goto out;
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}
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ret = mei_fwver(cldev);
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if (ret < 0)
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dev_err(&cldev->dev, "FW version command failed %d\n",
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ret);
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out:
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mei_cldev_disable(cldev);
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}
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/**
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* mei_wd - wd client on the bus, change protocol version
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* as the API has changed.
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*
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* @cldev: me clients device
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*/
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#if IS_ENABLED(CONFIG_INTEL_MEI_ME)
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#include <linux/pci.h>
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#include "hw-me-regs.h"
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static void mei_wd(struct mei_cl_device *cldev)
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{
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struct pci_dev *pdev = to_pci_dev(cldev->dev.parent);
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if (pdev->device == MEI_DEV_ID_WPT_LP ||
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pdev->device == MEI_DEV_ID_SPT ||
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pdev->device == MEI_DEV_ID_SPT_H)
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cldev->me_cl->props.protocol_version = 0x2;
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cldev->do_match = 1;
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}
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#else
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static inline void mei_wd(struct mei_cl_device *cldev) {}
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#endif /* CONFIG_INTEL_MEI_ME */
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struct mei_nfc_cmd {
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u8 command;
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u8 status;
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u16 req_id;
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u32 reserved;
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u16 data_size;
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u8 sub_command;
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u8 data[];
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} __packed;
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struct mei_nfc_reply {
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u8 command;
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u8 status;
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u16 req_id;
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u32 reserved;
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u16 data_size;
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u8 sub_command;
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u8 reply_status;
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u8 data[];
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} __packed;
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struct mei_nfc_if_version {
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u8 radio_version_sw[3];
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u8 reserved[3];
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u8 radio_version_hw[3];
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u8 i2c_addr;
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u8 fw_ivn;
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u8 vendor_id;
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u8 radio_type;
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} __packed;
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#define MEI_NFC_CMD_MAINTENANCE 0x00
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#define MEI_NFC_SUBCMD_IF_VERSION 0x01
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/* Vendors */
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#define MEI_NFC_VENDOR_INSIDE 0x00
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#define MEI_NFC_VENDOR_NXP 0x01
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/* Radio types */
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#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
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#define MEI_NFC_VENDOR_NXP_PN544 0x01
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/**
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* mei_nfc_if_version - get NFC interface version
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*
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* @cl: host client (nfc info)
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* @ver: NFC interface version to be filled in
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*
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* Return: 0 on success; < 0 otherwise
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*/
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static int mei_nfc_if_version(struct mei_cl *cl,
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struct mei_nfc_if_version *ver)
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{
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struct mei_device *bus;
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struct mei_nfc_cmd cmd = {
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.command = MEI_NFC_CMD_MAINTENANCE,
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.data_size = 1,
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.sub_command = MEI_NFC_SUBCMD_IF_VERSION,
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};
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struct mei_nfc_reply *reply = NULL;
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size_t if_version_length;
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u8 vtag;
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int bytes_recv, ret;
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bus = cl->dev;
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WARN_ON(mutex_is_locked(&bus->device_lock));
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ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(cmd), 0,
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MEI_CL_IO_TX_BLOCKING);
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if (ret < 0) {
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dev_err(bus->dev, "Could not send IF version cmd\n");
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return ret;
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}
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/* to be sure on the stack we alloc memory */
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if_version_length = sizeof(*reply) + sizeof(*ver);
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reply = kzalloc(if_version_length, GFP_KERNEL);
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if (!reply)
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return -ENOMEM;
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ret = 0;
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bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length, &vtag,
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0, 0);
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if (bytes_recv < 0 || (size_t)bytes_recv < if_version_length) {
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dev_err(bus->dev, "Could not read IF version\n");
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ret = -EIO;
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goto err;
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}
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memcpy(ver, reply->data, sizeof(*ver));
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dev_info(bus->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
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ver->fw_ivn, ver->vendor_id, ver->radio_type);
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err:
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kfree(reply);
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return ret;
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}
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/**
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* mei_nfc_radio_name - derive nfc radio name from the interface version
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*
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* @ver: NFC radio version
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*
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* Return: radio name string
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*/
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static const char *mei_nfc_radio_name(struct mei_nfc_if_version *ver)
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{
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if (ver->vendor_id == MEI_NFC_VENDOR_INSIDE) {
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if (ver->radio_type == MEI_NFC_VENDOR_INSIDE_UREAD)
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return "microread";
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}
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if (ver->vendor_id == MEI_NFC_VENDOR_NXP) {
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if (ver->radio_type == MEI_NFC_VENDOR_NXP_PN544)
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return "pn544";
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}
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return NULL;
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}
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/**
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* mei_nfc - The nfc fixup function. The function retrieves nfc radio
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* name and set is as device attribute so we can load
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* the proper device driver for it
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*
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* @cldev: me client device (nfc)
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*/
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static void mei_nfc(struct mei_cl_device *cldev)
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{
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struct mei_device *bus;
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struct mei_cl *cl;
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struct mei_me_client *me_cl = NULL;
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struct mei_nfc_if_version ver;
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const char *radio_name = NULL;
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int ret;
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bus = cldev->bus;
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mutex_lock(&bus->device_lock);
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/* we need to connect to INFO GUID */
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cl = mei_cl_alloc_linked(bus);
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if (IS_ERR(cl)) {
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ret = PTR_ERR(cl);
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cl = NULL;
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dev_err(bus->dev, "nfc hook alloc failed %d\n", ret);
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goto out;
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}
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|
|
me_cl = mei_me_cl_by_uuid(bus, &mei_nfc_info_guid);
|
|
if (!me_cl) {
|
|
ret = -ENOTTY;
|
|
dev_err(bus->dev, "Cannot find nfc info %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = mei_cl_connect(cl, me_cl, NULL);
|
|
if (ret < 0) {
|
|
dev_err(&cldev->dev, "Can't connect to the NFC INFO ME ret = %d\n",
|
|
ret);
|
|
goto out;
|
|
}
|
|
|
|
mutex_unlock(&bus->device_lock);
|
|
|
|
ret = mei_nfc_if_version(cl, &ver);
|
|
if (ret)
|
|
goto disconnect;
|
|
|
|
radio_name = mei_nfc_radio_name(&ver);
|
|
|
|
if (!radio_name) {
|
|
ret = -ENOENT;
|
|
dev_err(&cldev->dev, "Can't get the NFC interface version ret = %d\n",
|
|
ret);
|
|
goto disconnect;
|
|
}
|
|
|
|
dev_dbg(bus->dev, "nfc radio %s\n", radio_name);
|
|
strscpy(cldev->name, radio_name, sizeof(cldev->name));
|
|
|
|
disconnect:
|
|
mutex_lock(&bus->device_lock);
|
|
if (mei_cl_disconnect(cl) < 0)
|
|
dev_err(bus->dev, "Can't disconnect the NFC INFO ME\n");
|
|
|
|
mei_cl_flush_queues(cl, NULL);
|
|
|
|
out:
|
|
mei_cl_unlink(cl);
|
|
mutex_unlock(&bus->device_lock);
|
|
mei_me_cl_put(me_cl);
|
|
kfree(cl);
|
|
|
|
if (ret)
|
|
cldev->do_match = 0;
|
|
|
|
dev_dbg(bus->dev, "end of fixup match = %d\n", cldev->do_match);
|
|
}
|
|
|
|
/**
|
|
* vt_support - enable on bus clients with vtag support
|
|
*
|
|
* @cldev: me clients device
|
|
*/
|
|
static void vt_support(struct mei_cl_device *cldev)
|
|
{
|
|
if (cldev->me_cl->props.vt_supported == 1)
|
|
cldev->do_match = 1;
|
|
}
|
|
|
|
/**
|
|
* pxp_is_ready - enable bus client if pxp is ready
|
|
*
|
|
* @cldev: me clients device
|
|
*/
|
|
static void pxp_is_ready(struct mei_cl_device *cldev)
|
|
{
|
|
struct mei_device *bus = cldev->bus;
|
|
|
|
switch (bus->pxp_mode) {
|
|
case MEI_DEV_PXP_READY:
|
|
case MEI_DEV_PXP_DEFAULT:
|
|
cldev->do_match = 1;
|
|
break;
|
|
default:
|
|
cldev->do_match = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
#define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
|
|
|
|
static struct mei_fixup {
|
|
|
|
const uuid_le uuid;
|
|
void (*hook)(struct mei_cl_device *cldev);
|
|
} mei_fixups[] = {
|
|
MEI_FIXUP(MEI_UUID_ANY, number_of_connections),
|
|
MEI_FIXUP(MEI_UUID_NFC_INFO, blacklist),
|
|
MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
|
|
MEI_FIXUP(MEI_UUID_WD, mei_wd),
|
|
MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
|
|
MEI_FIXUP(MEI_UUID_IGSC_MKHI, mei_gsc_mkhi_ver),
|
|
MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_fix_ver),
|
|
MEI_FIXUP(MEI_UUID_HDCP, whitelist),
|
|
MEI_FIXUP(MEI_UUID_ANY, vt_support),
|
|
MEI_FIXUP(MEI_UUID_PAVP, pxp_is_ready),
|
|
};
|
|
|
|
/**
|
|
* mei_cl_bus_dev_fixup - run fixup handlers
|
|
*
|
|
* @cldev: me client device
|
|
*/
|
|
void mei_cl_bus_dev_fixup(struct mei_cl_device *cldev)
|
|
{
|
|
struct mei_fixup *f;
|
|
const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
|
|
size_t i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(mei_fixups); i++) {
|
|
|
|
f = &mei_fixups[i];
|
|
if (uuid_le_cmp(f->uuid, MEI_UUID_ANY) == 0 ||
|
|
uuid_le_cmp(f->uuid, *uuid) == 0)
|
|
f->hook(cldev);
|
|
}
|
|
}
|
|
|