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-rw-r--r--drivers/misc/mei/bus-fixup.c580
1 files changed, 580 insertions, 0 deletions
diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
new file mode 100644
index 000000000..5eeb4d04c
--- /dev/null
+++ b/drivers/misc/mei/bus-fixup.c
@@ -0,0 +1,580 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2013-2022, Intel Corporation. All rights reserved.
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/uuid.h>
+
+#include <linux/mei_cl_bus.h>
+
+#include "mei_dev.h"
+#include "client.h"
+#include "mkhi.h"
+
+#define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
+ 0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
+
+static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
+
+#define MEI_UUID_NFC_HCI UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
+ 0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)
+
+#define MEI_UUID_WD UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, \
+ 0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB)
+
+#define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
+ 0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
+
+#define MEI_UUID_IGSC_MKHI UUID_LE(0xE2C2AFA2, 0x3817, 0x4D19, \
+ 0x9D, 0x95, 0x06, 0xB1, 0x6B, 0x58, 0x8A, 0x5D)
+
+#define MEI_UUID_IGSC_MKHI_FIX UUID_LE(0x46E0C1FB, 0xA546, 0x414F, \
+ 0x91, 0x70, 0xB7, 0xF4, 0x6D, 0x57, 0xB4, 0xAD)
+
+#define MEI_UUID_HDCP UUID_LE(0xB638AB7E, 0x94E2, 0x4EA2, \
+ 0xA5, 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
+
+#define MEI_UUID_PAVP UUID_LE(0xfbf6fcf1, 0x96cf, 0x4e2e, 0xA6, \
+ 0xa6, 0x1b, 0xab, 0x8c, 0xbe, 0x36, 0xb1)
+
+#define MEI_UUID_ANY NULL_UUID_LE
+
+/**
+ * number_of_connections - determine whether an client be on the bus
+ * according number of connections
+ * We support only clients:
+ * 1. with single connection
+ * 2. and fixed clients (max_number_of_connections == 0)
+ *
+ * @cldev: me clients device
+ */
+static void number_of_connections(struct mei_cl_device *cldev)
+{
+ if (cldev->me_cl->props.max_number_of_connections > 1)
+ cldev->do_match = 0;
+}
+
+/**
+ * blacklist - blacklist a client from the bus
+ *
+ * @cldev: me clients device
+ */
+static void blacklist(struct mei_cl_device *cldev)
+{
+ cldev->do_match = 0;
+}
+
+/**
+ * whitelist - forcefully whitelist client
+ *
+ * @cldev: me clients device
+ */
+static void whitelist(struct mei_cl_device *cldev)
+{
+ cldev->do_match = 1;
+}
+
+#define OSTYPE_LINUX 2
+struct mei_os_ver {
+ __le16 build;
+ __le16 reserved1;
+ u8 os_type;
+ u8 major;
+ u8 minor;
+ u8 reserved2;
+} __packed;
+
+struct mkhi_fw_ver_block {
+ u16 minor;
+ u8 major;
+ u8 platform;
+ u16 buildno;
+ u16 hotfix;
+} __packed;
+
+struct mkhi_fw_ver {
+ struct mkhi_fw_ver_block ver[MEI_MAX_FW_VER_BLOCKS];
+} __packed;
+
+#define MKHI_OSVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
+ sizeof(struct mkhi_fwcaps) + \
+ sizeof(struct mei_os_ver))
+static int mei_osver(struct mei_cl_device *cldev)
+{
+ const size_t size = MKHI_OSVER_BUF_LEN;
+ char buf[MKHI_OSVER_BUF_LEN];
+ struct mkhi_msg *req;
+ struct mkhi_fwcaps *fwcaps;
+ struct mei_os_ver *os_ver;
+ unsigned int mode = MEI_CL_IO_TX_BLOCKING | MEI_CL_IO_TX_INTERNAL;
+
+ memset(buf, 0, size);
+
+ req = (struct mkhi_msg *)buf;
+ req->hdr.group_id = MKHI_FWCAPS_GROUP_ID;
+ req->hdr.command = MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD;
+
+ fwcaps = (struct mkhi_fwcaps *)req->data;
+
+ fwcaps->id.rule_type = 0x0;
+ fwcaps->id.feature_id = MKHI_FEATURE_PTT;
+ fwcaps->len = sizeof(*os_ver);
+ os_ver = (struct mei_os_ver *)fwcaps->data;
+ os_ver->os_type = OSTYPE_LINUX;
+
+ return __mei_cl_send(cldev->cl, buf, size, 0, mode);
+}
+
+#define MKHI_FWVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
+ sizeof(struct mkhi_fw_ver))
+#define MKHI_FWVER_LEN(__num) (sizeof(struct mkhi_msg_hdr) + \
+ sizeof(struct mkhi_fw_ver_block) * (__num))
+static int mei_fwver(struct mei_cl_device *cldev)
+{
+ char buf[MKHI_FWVER_BUF_LEN];
+ struct mkhi_msg req;
+ struct mkhi_msg *rsp;
+ struct mkhi_fw_ver *fwver;
+ int bytes_recv, ret, i;
+
+ memset(buf, 0, sizeof(buf));
+
+ req.hdr.group_id = MKHI_GEN_GROUP_ID;
+ req.hdr.command = MKHI_GEN_GET_FW_VERSION_CMD;
+
+ ret = __mei_cl_send(cldev->cl, (u8 *)&req, sizeof(req), 0,
+ MEI_CL_IO_TX_BLOCKING);
+ if (ret < 0) {
+ dev_err(&cldev->dev, "Could not send ReqFWVersion cmd ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = 0;
+ bytes_recv = __mei_cl_recv(cldev->cl, buf, sizeof(buf), NULL, 0,
+ cldev->bus->timeouts.mkhi_recv);
+ if (bytes_recv < 0 || (size_t)bytes_recv < MKHI_FWVER_LEN(1)) {
+ /*
+ * Should be at least one version block,
+ * error out if nothing found
+ */
+ dev_err(&cldev->dev, "Could not read FW version ret = %d\n", bytes_recv);
+ return -EIO;
+ }
+
+ rsp = (struct mkhi_msg *)buf;
+ fwver = (struct mkhi_fw_ver *)rsp->data;
+ memset(cldev->bus->fw_ver, 0, sizeof(cldev->bus->fw_ver));
+ for (i = 0; i < MEI_MAX_FW_VER_BLOCKS; i++) {
+ if ((size_t)bytes_recv < MKHI_FWVER_LEN(i + 1))
+ break;
+ dev_dbg(&cldev->dev, "FW version%d %d:%d.%d.%d.%d\n",
+ i, fwver->ver[i].platform,
+ fwver->ver[i].major, fwver->ver[i].minor,
+ fwver->ver[i].hotfix, fwver->ver[i].buildno);
+
+ cldev->bus->fw_ver[i].platform = fwver->ver[i].platform;
+ cldev->bus->fw_ver[i].major = fwver->ver[i].major;
+ cldev->bus->fw_ver[i].minor = fwver->ver[i].minor;
+ cldev->bus->fw_ver[i].hotfix = fwver->ver[i].hotfix;
+ cldev->bus->fw_ver[i].buildno = fwver->ver[i].buildno;
+ }
+
+ return ret;
+}
+
+static int mei_gfx_memory_ready(struct mei_cl_device *cldev)
+{
+ struct mkhi_gfx_mem_ready req = {0};
+ unsigned int mode = MEI_CL_IO_TX_INTERNAL;
+
+ req.hdr.group_id = MKHI_GROUP_ID_GFX;
+ req.hdr.command = MKHI_GFX_MEMORY_READY_CMD_REQ;
+ req.flags = MKHI_GFX_MEM_READY_PXP_ALLOWED;
+
+ dev_dbg(&cldev->dev, "Sending memory ready command\n");
+ return __mei_cl_send(cldev->cl, (u8 *)&req, sizeof(req), 0, mode);
+}
+
+static void mei_mkhi_fix(struct mei_cl_device *cldev)
+{
+ int ret;
+
+ /* No need to enable the client if nothing is needed from it */
+ if (!cldev->bus->fw_f_fw_ver_supported &&
+ !cldev->bus->hbm_f_os_supported)
+ return;
+
+ ret = mei_cldev_enable(cldev);
+ if (ret)
+ return;
+
+ if (cldev->bus->fw_f_fw_ver_supported) {
+ ret = mei_fwver(cldev);
+ if (ret < 0)
+ dev_err(&cldev->dev, "FW version command failed %d\n",
+ ret);
+ }
+
+ if (cldev->bus->hbm_f_os_supported) {
+ ret = mei_osver(cldev);
+ if (ret < 0)
+ dev_err(&cldev->dev, "OS version command failed %d\n",
+ ret);
+ }
+ mei_cldev_disable(cldev);
+}
+
+static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
+{
+ int ret;
+
+ /* No need to enable the client if nothing is needed from it */
+ if (!cldev->bus->fw_f_fw_ver_supported)
+ return;
+
+ ret = mei_cldev_enable(cldev);
+ if (ret)
+ return;
+
+ ret = mei_fwver(cldev);
+ if (ret < 0)
+ dev_err(&cldev->dev, "FW version command failed %d\n", ret);
+ mei_cldev_disable(cldev);
+}
+
+static void mei_gsc_mkhi_fix_ver(struct mei_cl_device *cldev)
+{
+ int ret;
+
+ /* No need to enable the client if nothing is needed from it */
+ if (!cldev->bus->fw_f_fw_ver_supported &&
+ cldev->bus->pxp_mode != MEI_DEV_PXP_INIT)
+ return;
+
+ ret = mei_cldev_enable(cldev);
+ if (ret)
+ return;
+
+ if (cldev->bus->pxp_mode == MEI_DEV_PXP_INIT) {
+ ret = mei_gfx_memory_ready(cldev);
+ if (ret < 0)
+ dev_err(&cldev->dev, "memory ready command failed %d\n", ret);
+ else
+ dev_dbg(&cldev->dev, "memory ready command sent\n");
+ /* we go to reset after that */
+ cldev->bus->pxp_mode = MEI_DEV_PXP_SETUP;
+ goto out;
+ }
+
+ ret = mei_fwver(cldev);
+ if (ret < 0)
+ dev_err(&cldev->dev, "FW version command failed %d\n",
+ ret);
+out:
+ mei_cldev_disable(cldev);
+}
+
+/**
+ * mei_wd - wd client on the bus, change protocol version
+ * as the API has changed.
+ *
+ * @cldev: me clients device
+ */
+#if IS_ENABLED(CONFIG_INTEL_MEI_ME)
+#include <linux/pci.h>
+#include "hw-me-regs.h"
+static void mei_wd(struct mei_cl_device *cldev)
+{
+ struct pci_dev *pdev = to_pci_dev(cldev->dev.parent);
+
+ if (pdev->device == MEI_DEV_ID_WPT_LP ||
+ pdev->device == MEI_DEV_ID_SPT ||
+ pdev->device == MEI_DEV_ID_SPT_H)
+ cldev->me_cl->props.protocol_version = 0x2;
+
+ cldev->do_match = 1;
+}
+#else
+static inline void mei_wd(struct mei_cl_device *cldev) {}
+#endif /* CONFIG_INTEL_MEI_ME */
+
+struct mei_nfc_cmd {
+ u8 command;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+ u8 sub_command;
+ u8 data[];
+} __packed;
+
+struct mei_nfc_reply {
+ u8 command;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+ u8 sub_command;
+ u8 reply_status;
+ u8 data[];
+} __packed;
+
+struct mei_nfc_if_version {
+ u8 radio_version_sw[3];
+ u8 reserved[3];
+ u8 radio_version_hw[3];
+ u8 i2c_addr;
+ u8 fw_ivn;
+ u8 vendor_id;
+ u8 radio_type;
+} __packed;
+
+
+#define MEI_NFC_CMD_MAINTENANCE 0x00
+#define MEI_NFC_SUBCMD_IF_VERSION 0x01
+
+/* Vendors */
+#define MEI_NFC_VENDOR_INSIDE 0x00
+#define MEI_NFC_VENDOR_NXP 0x01
+
+/* Radio types */
+#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
+#define MEI_NFC_VENDOR_NXP_PN544 0x01
+
+/**
+ * mei_nfc_if_version - get NFC interface version
+ *
+ * @cl: host client (nfc info)
+ * @ver: NFC interface version to be filled in
+ *
+ * Return: 0 on success; < 0 otherwise
+ */
+static int mei_nfc_if_version(struct mei_cl *cl,
+ struct mei_nfc_if_version *ver)
+{
+ struct mei_device *bus;
+ struct mei_nfc_cmd cmd = {
+ .command = MEI_NFC_CMD_MAINTENANCE,
+ .data_size = 1,
+ .sub_command = MEI_NFC_SUBCMD_IF_VERSION,
+ };
+ struct mei_nfc_reply *reply = NULL;
+ size_t if_version_length;
+ u8 vtag;
+ int bytes_recv, ret;
+
+ bus = cl->dev;
+
+ WARN_ON(mutex_is_locked(&bus->device_lock));
+
+ ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(cmd), 0,
+ MEI_CL_IO_TX_BLOCKING);
+ if (ret < 0) {
+ dev_err(bus->dev, "Could not send IF version cmd ret = %d\n", ret);
+ return ret;
+ }
+
+ /* to be sure on the stack we alloc memory */
+ if_version_length = sizeof(*reply) + sizeof(*ver);
+
+ reply = kzalloc(if_version_length, GFP_KERNEL);
+ if (!reply)
+ return -ENOMEM;
+
+ ret = 0;
+ bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length, &vtag,
+ 0, 0);
+ if (bytes_recv < 0 || (size_t)bytes_recv < if_version_length) {
+ dev_err(bus->dev, "Could not read IF version ret = %d\n", bytes_recv);
+ ret = -EIO;
+ goto err;
+ }
+
+ memcpy(ver, reply->data, sizeof(*ver));
+
+ dev_info(bus->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
+ ver->fw_ivn, ver->vendor_id, ver->radio_type);
+
+err:
+ kfree(reply);
+ return ret;
+}
+
+/**
+ * mei_nfc_radio_name - derive nfc radio name from the interface version
+ *
+ * @ver: NFC radio version
+ *
+ * Return: radio name string
+ */
+static const char *mei_nfc_radio_name(struct mei_nfc_if_version *ver)
+{
+
+ if (ver->vendor_id == MEI_NFC_VENDOR_INSIDE) {
+ if (ver->radio_type == MEI_NFC_VENDOR_INSIDE_UREAD)
+ return "microread";
+ }
+
+ if (ver->vendor_id == MEI_NFC_VENDOR_NXP) {
+ if (ver->radio_type == MEI_NFC_VENDOR_NXP_PN544)
+ return "pn544";
+ }
+
+ return NULL;
+}
+
+/**
+ * mei_nfc - The nfc fixup function. The function retrieves nfc radio
+ * name and set is as device attribute so we can load
+ * the proper device driver for it
+ *
+ * @cldev: me client device (nfc)
+ */
+static void mei_nfc(struct mei_cl_device *cldev)
+{
+ struct mei_device *bus;
+ struct mei_cl *cl;
+ struct mei_me_client *me_cl = NULL;
+ struct mei_nfc_if_version ver;
+ const char *radio_name = NULL;
+ int ret;
+
+ bus = cldev->bus;
+
+ mutex_lock(&bus->device_lock);
+ /* we need to connect to INFO GUID */
+ cl = mei_cl_alloc_linked(bus);
+ if (IS_ERR(cl)) {
+ ret = PTR_ERR(cl);
+ cl = NULL;
+ dev_err(bus->dev, "nfc hook alloc failed %d\n", ret);
+ goto out;
+ }
+
+ 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);
+ }
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 05:29:01 +0000