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Subject[PATCH v2 13/15] soc: octeontx2: Add support for CGX link management
Date
From: Linu Cherian <lcherian@marvell.com>

CGX LMAC initialization, link status polling etc is done
by low level secure firmware. For link management this patch
adds a interface or communication mechanism between firmware
and this kernel CGX driver.

- Firmware interface specification is defined in cgx_fw_if.h.
- Support to send/receive commands/events to/form firmware.
- events/commands implemented
* link up
* link down
* reading firmware version

Signed-off-by: Linu Cherian <lcherian@marvell.com>
Signed-off-by: Nithya Mani <nmani@marvell.com>
---
drivers/soc/marvell/octeontx2/cgx.c | 364 +++++++++++++++++++++++++++++-
drivers/soc/marvell/octeontx2/cgx.h | 32 +++
drivers/soc/marvell/octeontx2/cgx_fw_if.h | 225 ++++++++++++++++++
3 files changed, 617 insertions(+), 4 deletions(-)
create mode 100644 drivers/soc/marvell/octeontx2/cgx_fw_if.h

diff --git a/drivers/soc/marvell/octeontx2/cgx.c b/drivers/soc/marvell/octeontx2/cgx.c
index c5e0ebb..26af8fa 100644
--- a/drivers/soc/marvell/octeontx2/cgx.c
+++ b/drivers/soc/marvell/octeontx2/cgx.c
@@ -25,16 +25,43 @@
#define DRV_STRING "Marvell OcteonTX2 CGX/MAC Driver"
#define DRV_VERSION "1.0"

+/**
+ * struct lmac
+ * @wq_cmd_cmplt: waitq to keep the process blocked until cmd completion
+ * @cmd_lock: Lock to serialize the command interface
+ * @resp: command response
+ * @event_cb: callback for linkchange events
+ * @cmd_pend: flag set before new command is started
+ * flag cleared after command response is received
+ * @cgx: parent cgx port
+ * @lmac_id: lmac port id
+ * @name: lmac port name
+ */
+struct lmac {
+ wait_queue_head_t wq_cmd_cmplt;
+ struct mutex cmd_lock;
+ struct cgx_evt_sts resp;
+ struct cgx_event_cb event_cb;
+ bool cmd_pend;
+ struct cgx *cgx;
+ u8 lmac_id;
+ char *name;
+};
+
struct cgx {
void __iomem *reg_base;
struct pci_dev *pdev;
u8 cgx_id;
u8 lmac_count;
+ struct lmac *lmac_idmap[MAX_LMAC_PER_CGX];
struct list_head cgx_list;
};

static LIST_HEAD(cgx_list);

+/* CGX PHY management internal APIs */
+static int cgx_fwi_link_change(struct cgx *cgx, int lmac_id, bool en);
+
/* Supported devices */
static const struct pci_device_id cgx_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_CGX) },
@@ -47,11 +74,24 @@ MODULE_LICENSE("GPL v2");
MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, cgx_id_table);

+static void cgx_write(struct cgx *cgx, u64 lmac, u64 offset, u64 val)
+{
+ writeq(val, cgx->reg_base + (lmac << 18) + offset);
+}
+
static u64 cgx_read(struct cgx *cgx, u64 lmac, u64 offset)
{
return readq(cgx->reg_base + (lmac << 18) + offset);
}

+static inline struct lmac *lmac_pdata(u8 lmac_id, struct cgx *cgx)
+{
+ if (!cgx || lmac_id >= MAX_LMAC_PER_CGX)
+ return NULL;
+
+ return cgx->lmac_idmap[lmac_id];
+}
+
int cgx_get_cgx_cnt(void)
{
struct cgx *cgx_dev;
@@ -87,18 +127,318 @@ void *cgx_get_pdata(int cgx_id)
}
EXPORT_SYMBOL(cgx_get_pdata);

-static void cgx_lmac_init(struct cgx *cgx)
+/* CGX Firmware interface low level support */
+static int cgx_fwi_cmd_send(struct cgx_cmd *cmd, struct cgx_evt_sts *rsp,
+ struct lmac *lmac)
+{
+ struct cgx *cgx = lmac->cgx;
+ union cgx_cmdreg creg;
+ union cgx_evtreg ereg;
+ struct device *dev;
+ int err = 0;
+
+ /* Ensure no other command is in progress */
+ err = mutex_lock_interruptible(&lmac->cmd_lock);
+ if (err)
+ return err;
+
+ /* Ensure command register is free */
+ creg.val = cgx_read(cgx, lmac->lmac_id, CGX_COMMAND_REG);
+ if (creg.cmd.own != CGX_CMD_OWN_NS) {
+ err = -EBUSY;
+ goto unlock;
+ }
+
+ /* Update ownership in command request */
+ cmd->own = CGX_CMD_OWN_FIRMWARE;
+
+ /* Mark this lmac as pending, before we start */
+ lmac->cmd_pend = true;
+
+ /* Start command in hardware */
+ creg.cmd = *cmd;
+ cgx_write(cgx, lmac->lmac_id, CGX_COMMAND_REG, creg.val);
+ creg.val = cgx_read(cgx, lmac->lmac_id, CGX_COMMAND_REG);
+
+ /* Ensure command is completed without errors */
+ if (!wait_event_timeout(lmac->wq_cmd_cmplt, !lmac->cmd_pend,
+ msecs_to_jiffies(CGX_CMD_TIMEOUT))) {
+ dev = &cgx->pdev->dev;
+ ereg.val = cgx_read(cgx, lmac->lmac_id, CGX_EVENT_REG);
+ if (ereg.val) {
+ dev_err(dev, "cgx port %d:%d: No event for response\n",
+ cgx->cgx_id, lmac->lmac_id);
+ /* copy event */
+ lmac->resp = ereg.evt_sts;
+ } else {
+ dev_err(dev, "cgx port %d:%d cmd timeout\n",
+ cgx->cgx_id, lmac->lmac_id);
+ err = -EIO;
+ goto unlock;
+ }
+ }
+
+ /* we have a valid command response */
+ smp_rmb(); /* Ensure the latest updates are visible */
+ *rsp = lmac->resp;
+
+unlock:
+ mutex_unlock(&lmac->cmd_lock);
+
+ return err;
+}
+
+static inline int cgx_fwi_cmd_generic(struct cgx_cmd *req,
+ struct cgx_evt_sts *rsp,
+ struct cgx *cgx, int lmac_id)
+{
+ struct lmac *lmac;
+ int err;
+
+ lmac = lmac_pdata(lmac_id, cgx);
+ if (!lmac)
+ return -ENODEV;
+
+ err = cgx_fwi_cmd_send(req, rsp, lmac);
+
+ /* Check for valid response */
+ if (!err) {
+ if (rsp->stat == CGX_STAT_FAIL)
+ return -EIO;
+ else
+ return 0;
+ }
+
+ return err;
+}
+
+/* Hardware event handlers */
+static inline void cgx_link_change_handler(struct cgx_lnk_sts *lstat,
+ struct lmac *lmac)
+{
+ struct cgx *cgx = lmac->cgx;
+ struct cgx_link_event event;
+ struct device *dev = &cgx->pdev->dev;
+
+ event.lstat = *lstat;
+ event.cgx_id = cgx->cgx_id;
+ event.lmac_id = lmac->lmac_id;
+
+ if (!lmac->event_cb.notify_link_chg) {
+ dev_dbg(dev, "cgx port %d:%d Link change handler null",
+ cgx->cgx_id, lmac->lmac_id);
+ if (lstat->err_type != CGX_ERR_NONE) {
+ dev_err(dev, "cgx port %d:%d Link error %d\n",
+ cgx->cgx_id, lmac->lmac_id, lstat->err_type);
+ }
+ dev_info(dev, "cgx port %d:%d Link status %s, speed %x\n",
+ cgx->cgx_id, lmac->lmac_id,
+ lstat->link_up ? "UP" : "DOWN", lstat->speed);
+ return;
+ }
+
+ if (lmac->event_cb.notify_link_chg(&event, lmac->event_cb.data))
+ dev_err(dev, "event notification failure\n");
+}
+
+static inline bool cgx_cmdresp_is_linkevent(struct cgx_evt_sts *rsp)
+{
+ if (rsp->id == CGX_CMD_LINK_BRING_UP ||
+ rsp->id == CGX_CMD_LINK_BRING_DOWN)
+ return true;
+ else
+ return false;
+}
+
+static inline bool cgx_event_is_linkevent(struct cgx_evt_sts *evt)
+{
+ if (evt->id == CGX_EVT_LINK_CHANGE)
+ return true;
+ else
+ return false;
+}
+
+static irqreturn_t cgx_fwi_event_handler(int irq, void *data)
+{
+ struct lmac *lmac = data;
+ struct cgx *cgx = lmac->cgx;
+ struct cgx_evt_sts event;
+ union cgx_evtreg ereg;
+ struct device *dev;
+
+ ereg.val = cgx_read(cgx, lmac->lmac_id, CGX_EVENT_REG);
+ if (!ereg.evt_sts.ack)
+ return IRQ_NONE;
+
+ dev = &cgx->pdev->dev;
+
+ event = ereg.evt_sts;
+
+ switch (event.evt_type) {
+ case CGX_EVT_CMD_RESP:
+ /* Copy the response. Since only one command is active at a
+ * time, there is no way a response can get overwritten
+ */
+ lmac->resp = event;
+ /* Ensure response is updated before thread context starts */
+ smp_wmb();
+
+ /* There wont be separate events for link change initiated from
+ * software; Hence report the command responses as events
+ */
+ if (cgx_cmdresp_is_linkevent(&event))
+ cgx_link_change_handler(&ereg.link_sts, lmac);
+
+ /* Release thread waiting for completion */
+ lmac->cmd_pend = false;
+ wake_up_interruptible(&lmac->wq_cmd_cmplt);
+ break;
+ case CGX_EVT_ASYNC:
+ if (cgx_event_is_linkevent(&event))
+ cgx_link_change_handler(&ereg.link_sts, lmac);
+ break;
+ default:
+ dev_err(dev, "cgx port %d:%d Unknown event received\n",
+ cgx->cgx_id, lmac->lmac_id);
+ }
+
+ /* Any new event or command response will be posted by firmware
+ * only after the current status is acked.
+ * Ack the interrupt register as well.
+ */
+ cgx_write(lmac->cgx, lmac->lmac_id, CGX_EVENT_REG, 0);
+ cgx_write(lmac->cgx, lmac->lmac_id, CGXX_CMRX_INT, FW_CGX_INT);
+
+ return IRQ_HANDLED;
+}
+
+/* APIs for PHY management using CGX firmware interface */
+
+/* callback registration for hardware events like link change */
+int cgx_lmac_evh_register(struct cgx_event_cb *cb, void *cgxd, int lmac_id)
{
+ struct lmac *lmac;
+ struct cgx *cgx = cgxd;
+
+ lmac = lmac_pdata(lmac_id, cgx);
+ if (!lmac)
+ return -ENODEV;
+
+ lmac->event_cb = *cb;
+
+ return 0;
+}
+EXPORT_SYMBOL(cgx_lmac_evh_register);
+
+static int cgx_fwi_link_change(struct cgx *cgx, int lmac_id, bool enable)
+{
+ struct cgx_cmd req = { 0 };
+ struct cgx_evt_sts rsp;
+
+ if (enable)
+ req.id = CGX_CMD_LINK_BRING_UP;
+ else
+ req.id = CGX_CMD_LINK_BRING_DOWN;
+
+ return cgx_fwi_cmd_generic(&req, &rsp, cgx, lmac_id);
+}
+EXPORT_SYMBOL(cgx_fwi_link_change);
+
+static inline int cgx_fwi_read_version(struct cgx_ver_s *ver, struct cgx *cgx)
+{
+ struct cgx_cmd req = { 0 };
+ union cgx_evtreg event;
+ int err;
+
+ req.id = CGX_CMD_GET_FW_VER;
+
+ err = cgx_fwi_cmd_generic(&req, &event.evt_sts, cgx, 0);
+ if (!err)
+ *ver = event.ver;
+
+ return err;
+}
+
+static int cgx_lmac_verify_fwi_version(struct cgx *cgx)
+{
+ struct cgx_ver_s ver;
+ struct device *dev = &cgx->pdev->dev;
+ int err;
+
+ if (!cgx->lmac_count)
+ return 0;
+
+ err = cgx_fwi_read_version(&ver, cgx);
+ dev_dbg(dev, "Firmware command interface version = %d.%d\n",
+ ver.major_ver, ver.minor_ver);
+ if (err || ver.major_ver != CGX_FIRMWARE_MAJOR_VER ||
+ ver.minor_ver != CGX_FIRMWARE_MINOR_VER)
+ return -EIO;
+ else
+ return 0;
+}
+
+static int cgx_lmac_init(struct cgx *cgx)
+{
+ struct lmac *lmac;
+ int i, err;
+
cgx->lmac_count = cgx_read(cgx, 0, CGXX_CMRX_RX_LMACS) & 0x7;
if (cgx->lmac_count > MAX_LMAC_PER_CGX)
cgx->lmac_count = MAX_LMAC_PER_CGX;
+
+ for (i = 0; i < cgx->lmac_count; i++) {
+ lmac = kcalloc(1, sizeof(struct lmac), GFP_KERNEL);
+ if (!lmac)
+ return -ENOMEM;
+ lmac->name = kcalloc(1, sizeof("cgx_fwi_xxx_yyy"), GFP_KERNEL);
+ if (!lmac->name)
+ return -ENOMEM;
+ sprintf(lmac->name, "cgx_fwi_%d_%d", cgx->cgx_id, i);
+ lmac->lmac_id = i;
+ lmac->cgx = cgx;
+ init_waitqueue_head(&lmac->wq_cmd_cmplt);
+ mutex_init(&lmac->cmd_lock);
+ err = request_irq(pci_irq_vector(cgx->pdev,
+ CGX_LMAC_FWI + i * 9),
+ cgx_fwi_event_handler, 0, lmac->name, lmac);
+ if (err)
+ return err;
+
+ /* Enable interrupt */
+ cgx_write(cgx, lmac->lmac_id, CGXX_CMRX_INT_ENA_W1S,
+ FW_CGX_INT);
+
+ /* Add reference */
+ cgx->lmac_idmap[i] = lmac;
+ }
+
+ return cgx_lmac_verify_fwi_version(cgx);
+}
+
+static int cgx_lmac_exit(struct cgx *cgx)
+{
+ struct lmac *lmac;
+ int i;
+
+ /* Free all lmac related resources */
+ for (i = 0; i < cgx->lmac_count; i++) {
+ lmac = cgx->lmac_idmap[i];
+ if (!lmac)
+ continue;
+ free_irq(pci_irq_vector(cgx->pdev, CGX_LMAC_FWI + i * 9), lmac);
+ kfree(lmac->name);
+ kfree(lmac);
+ }
+
+ return 0;
}

static int cgx_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
- int err;
struct device *dev = &pdev->dev;
struct cgx *cgx;
+ int err, nvec;

cgx = devm_kzalloc(dev, sizeof(*cgx), GFP_KERNEL);
if (!cgx)
@@ -128,14 +468,28 @@ static int cgx_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err_release_regions;
}

+ nvec = CGX_NVEC;
+ err = pci_alloc_irq_vectors(pdev, nvec, nvec, PCI_IRQ_MSIX);
+ if (err < 0 || err != nvec) {
+ dev_err(dev, "Request for %d msix vectors failed, err %d\n",
+ nvec, err);
+ goto err_release_regions;
+ }
+
list_add(&cgx->cgx_list, &cgx_list);
cgx->cgx_id = cgx_get_cgx_cnt() - 1;
- cgx_lmac_init(cgx);
+
+ err = cgx_lmac_init(cgx);
+ if (err)
+ goto err_release_lmac;
+

return 0;

-err_release_regions:
+err_release_lmac:
+ cgx_lmac_exit(cgx);
list_del(&cgx->cgx_list);
+err_release_regions:
pci_release_regions(pdev);
err_disable_device:
pci_disable_device(pdev);
@@ -147,7 +501,9 @@ static void cgx_remove(struct pci_dev *pdev)
{
struct cgx *cgx = pci_get_drvdata(pdev);

+ cgx_lmac_exit(cgx);
list_del(&cgx->cgx_list);
+ pci_free_irq_vectors(pdev);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
diff --git a/drivers/soc/marvell/octeontx2/cgx.h b/drivers/soc/marvell/octeontx2/cgx.h
index acdc16e..a2a7a6d 100644
--- a/drivers/soc/marvell/octeontx2/cgx.h
+++ b/drivers/soc/marvell/octeontx2/cgx.h
@@ -11,6 +11,8 @@
#ifndef CGX_H
#define CGX_H

+#include "cgx_fw_if.h"
+
/* PCI device IDs */
#define PCI_DEVID_OCTEONTX2_CGX 0xA059

@@ -22,12 +24,42 @@
#define CGX_OFFSET(x) ((x) * MAX_LMAC_PER_CGX)

/* Registers */
+#define CGXX_CMRX_INT 0x040
+#define FW_CGX_INT BIT_ULL(1)
+#define CGXX_CMRX_INT_ENA_W1S 0x058
#define CGXX_CMRX_RX_ID_MAP 0x060
#define CGXX_CMRX_RX_LMACS 0x128
+#define CGXX_SCRATCH0_REG 0x1050
+#define CGXX_SCRATCH1_REG 0x1058
+#define CGX_CONST 0x2000
+
+#define CGX_COMMAND_REG CGXX_SCRATCH1_REG
+#define CGX_EVENT_REG CGXX_SCRATCH0_REG
+#define CGX_CMD_TIMEOUT 2200 /* msecs */
+
+#define CGX_NVEC 37
+#define CGX_LMAC_FWI 0
+
+struct cgx_link_event {
+ struct cgx_lnk_sts lstat;
+ u8 cgx_id;
+ u8 lmac_id;
+};
+
+/**
+ * struct cgx_event_cb
+ * @notify_link_chg: callback for link change notification
+ * @data: data passed to callback function
+ */
+struct cgx_event_cb {
+ int (*notify_link_chg)(struct cgx_link_event *event, void *data);
+ void *data;
+};

extern struct pci_driver cgx_driver;

int cgx_get_cgx_cnt(void);
int cgx_get_lmac_cnt(void *cgxd);
void *cgx_get_pdata(int cgx_id);
+int cgx_lmac_evh_register(struct cgx_event_cb *cb, void *cgxd, int lmac_id);
#endif /* CGX_H */
diff --git a/drivers/soc/marvell/octeontx2/cgx_fw_if.h b/drivers/soc/marvell/octeontx2/cgx_fw_if.h
new file mode 100644
index 0000000..771dd50
--- /dev/null
+++ b/drivers/soc/marvell/octeontx2/cgx_fw_if.h
@@ -0,0 +1,225 @@
+/* SPDX-License-Identifier: GPL-2.0
+ * Marvell OcteonTx2 CGX driver
+ *
+ * Copyright (C) 2018 Marvell International Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __CGX_FW_INTF_H__
+#define __CGX_FW_INTF_H__
+
+#define CGX_FIRMWARE_MAJOR_VER 1
+#define CGX_FIRMWARE_MINOR_VER 0
+
+#define CGX_EVENT_ACK 1UL
+
+/* CGX error types. set for cmd response status as CGX_STAT_FAIL */
+enum cgx_error_type {
+ CGX_ERR_NONE,
+ CGX_ERR_LMAC_NOT_ENABLED,
+ CGX_ERR_LMAC_MODE_INVALID,
+ CGX_ERR_REQUEST_ID_INVALID,
+ CGX_ERR_PREV_ACK_NOT_CLEAR,
+ CGX_ERR_PHY_LINK_DOWN,
+ CGX_ERR_PCS_RESET_FAIL,
+ CGX_ERR_AN_CPT_FAIL,
+ CGX_ERR_TX_NOT_IDLE,
+ CGX_ERR_RX_NOT_IDLE,
+ CGX_ERR_SPUX_BR_BLKLOCK_FAIL,
+ CGX_ERR_SPUX_RX_ALIGN_FAIL,
+ CGX_ERR_SPUX_TX_FAULT,
+ CGX_ERR_SPUX_RX_FAULT,
+ CGX_ERR_SPUX_RESET_FAIL,
+ CGX_ERR_SPUX_AN_RESET_FAIL,
+ CGX_ERR_SPUX_USX_AN_RESET_FAIL,
+ CGX_ERR_SMUX_RX_LINK_NOT_OK,
+ CGX_ERR_PCS_RECV_LINK_FAIL,
+ CGX_ERR_TRAINING_FAIL,
+ CGX_ERR_RX_EQU_FAIL,
+ CGX_ERR_SPUX_BER_FAIL,
+ CGX_ERR_SPUX_RSFEC_ALGN_FAIL, /* = 22 */
+};
+
+/* LINK speed types */
+enum cgx_link_speed {
+ CGX_LINK_NONE,
+ CGX_LINK_10M,
+ CGX_LINK_100M,
+ CGX_LINK_1G,
+ CGX_LINK_2HG,
+ CGX_LINK_5G,
+ CGX_LINK_10G,
+ CGX_LINK_20G,
+ CGX_LINK_25G,
+ CGX_LINK_40G,
+ CGX_LINK_50G,
+ CGX_LINK_100G,
+ CGX_LINK_SPEED_MAX,
+};
+
+/* REQUEST ID types. Input to firmware */
+enum cgx_cmd_id {
+ CGX_CMD_NONE,
+ CGX_CMD_GET_FW_VER,
+ CGX_CMD_GET_MAC_ADDR,
+ CGX_CMD_SET_MTU,
+ CGX_CMD_GET_LINK_STS, /* optional to user */
+ CGX_CMD_LINK_BRING_UP,
+ CGX_CMD_LINK_BRING_DOWN,
+ CGX_CMD_INTERNAL_LBK,
+ CGX_CMD_EXTERNAL_LBK,
+ CGX_CMD_HIGIG,
+ CGX_CMD_LINK_STATE_CHANGE,
+ CGX_CMD_MODE_CHANGE, /* hot plug support */
+ CGX_CMD_INTF_SHUTDOWN,
+ CGX_CMD_IRQ_ENABLE,
+ CGX_CMD_IRQ_DISABLE,
+};
+
+/* async event ids */
+enum cgx_evt_id {
+ CGX_EVT_NONE,
+ CGX_EVT_LINK_CHANGE,
+};
+
+/* event types - cause of interrupt */
+enum cgx_evt_type {
+ CGX_EVT_ASYNC,
+ CGX_EVT_CMD_RESP
+};
+
+enum cgx_stat {
+ CGX_STAT_SUCCESS,
+ CGX_STAT_FAIL
+};
+
+enum cgx_cmd_own {
+ CGX_CMD_OWN_NS,
+ CGX_CMD_OWN_FIRMWARE,
+};
+
+/* scratchx(0) CSR used for ATF->non-secure SW communication.
+ * This acts as the status register
+ * Provides details on command ack/status, link status, error details
+ */
+struct cgx_evt_sts {
+ uint64_t ack:1;
+ uint64_t evt_type:1; /* cgx_evt_type */
+ uint64_t stat:1; /* cgx_stat */
+ uint64_t id:6; /* cgx_evt_id/cgx_cmd_id */
+ uint64_t reserved:55;
+};
+
+/* Response to command IDs with command status as CGX_STAT_FAIL
+ *
+ * Not applicable for commands :
+ * CGX_CMD_LINK_BRING_UP/DOWN/CGX_EVT_LINK_CHANGE
+ * check struct cgx_lnk_sts comments
+ */
+struct cgx_err_sts_s {
+ uint64_t reserved1:9;
+ uint64_t type:10; /* cgx_error_type */
+ uint64_t reserved2:35;
+};
+
+/* Response to cmd ID as CGX_CMD_GET_FW_VER with cmd status as
+ * CGX_STAT_SUCCESS
+ */
+struct cgx_ver_s {
+ uint64_t reserved1:9;
+ uint64_t major_ver:4;
+ uint64_t minor_ver:4;
+ uint64_t reserved2:47;
+};
+
+/* Response to cmd ID as CGX_CMD_GET_MAC_ADDR with cmd status as
+ * CGX_STAT_SUCCESS
+ */
+struct cgx_mac_addr_s {
+ uint64_t reserved1:9;
+ uint64_t local_mac_addr:48;
+ uint64_t reserved2:7;
+};
+
+/* Response to cmd ID - CGX_CMD_LINK_BRING_UP/DOWN, event ID CGX_EVT_LINK_CHANGE
+ * status can be either CGX_STAT_FAIL or CGX_STAT_SUCCESS
+ *
+ * In case of CGX_STAT_FAIL, it indicates CGX configuration failed
+ * when processing link up/down/change command.
+ * Both err_type and current link status will be updated
+ *
+ * In case of CGX_STAT_SUCCESS, err_type will be CGX_ERR_NONE and current
+ * link status will be updated
+ */
+struct cgx_lnk_sts {
+ uint64_t reserved1:9;
+ uint64_t link_up:1;
+ uint64_t full_duplex:1;
+ uint64_t speed:4; /* cgx_link_speed */
+ uint64_t err_type:10;
+ uint64_t reserved2:39;
+};
+
+union cgx_evtreg {
+ u64 val;
+ struct cgx_evt_sts evt_sts; /* common for all commands/events */
+ struct cgx_lnk_sts link_sts; /* response to LINK_BRINGUP/DOWN/CHANGE */
+ struct cgx_ver_s ver; /* response to CGX_CMD_GET_FW_VER */
+ struct cgx_mac_addr_s mac_addr; /* response to CGX_CMD_GET_MAC_ADDR */
+ struct cgx_err_sts_s err; /* response if evt_status = CMD_FAIL */
+};
+
+/* scratchx(1) CSR used for non-secure SW->ATF communication
+ * This CSR acts as a command register
+ */
+struct cgx_cmd {
+ uint64_t own:2; /* cgx_csr_own */
+ uint64_t id:6; /* cgx_request_id */
+ uint64_t reserved2:56;
+};
+
+/* Any command using enable/disable as an argument need
+ * to pass the option via this structure.
+ * Ex: Loopback, HiGig...
+ */
+struct cgx_ctl_args {
+ uint64_t reserved1:8;
+ uint64_t enable:1;
+ uint64_t reserved2:55;
+};
+
+/* command argument to be passed for cmd ID - CGX_CMD_SET_MTU */
+struct cgx_mtu_args {
+ uint64_t reserved1:8;
+ uint64_t size:16;
+ uint64_t reserved2:40;
+};
+
+/* command argument to be passed for cmd ID - CGX_CMD_LINK_CHANGE */
+struct cgx_link_change_args {
+ uint64_t reserved1:8;
+ uint64_t link_up:1;
+ uint64_t full_duplex:1;
+ uint64_t speed:4; /* cgx_link_speed */
+ uint64_t reserved2:50;
+};
+
+struct cgx_irq_cfg {
+ uint64_t reserved1:8;
+ uint64_t irq_phys:32;
+ uint64_t reserved2:24;
+};
+
+union cgx_cmdreg {
+ u64 val;
+ struct cgx_cmd cmd;
+ struct cgx_ctl_args cmd_args;
+ struct cgx_mtu_args mtu_size;
+ struct cgx_irq_cfg irq_cfg; /* Input to CGX_CMD_IRQ_ENABLE */
+ struct cgx_link_change_args lnk_args;/* Input to CGX_CMD_LINK_CHANGE */
+};
+
+#endif /* __CGX_FW_INTF_H__ */
--
2.7.4
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