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// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
#include <linux/module.h>
#include <linux/version.h>
#include <linux/netdevice.h>
#include <linux/utsname.h>
#include "ionic.h"
#include "ionic_bus.h"
#include "ionic_debugfs.h"
MODULE_DESCRIPTION(IONIC_DRV_DESCRIPTION);
MODULE_AUTHOR("Pensando Systems, Inc");
MODULE_LICENSE("GPL");
MODULE_VERSION(IONIC_DRV_VERSION);
static const char *ionic_error_to_str(enum ionic_status_code code)
{
switch (code) {
case IONIC_RC_SUCCESS:
return "IONIC_RC_SUCCESS";
case IONIC_RC_EVERSION:
return "IONIC_RC_EVERSION";
case IONIC_RC_EOPCODE:
return "IONIC_RC_EOPCODE";
case IONIC_RC_EIO:
return "IONIC_RC_EIO";
case IONIC_RC_EPERM:
return "IONIC_RC_EPERM";
case IONIC_RC_EQID:
return "IONIC_RC_EQID";
case IONIC_RC_EQTYPE:
return "IONIC_RC_EQTYPE";
case IONIC_RC_ENOENT:
return "IONIC_RC_ENOENT";
case IONIC_RC_EINTR:
return "IONIC_RC_EINTR";
case IONIC_RC_EAGAIN:
return "IONIC_RC_EAGAIN";
case IONIC_RC_ENOMEM:
return "IONIC_RC_ENOMEM";
case IONIC_RC_EFAULT:
return "IONIC_RC_EFAULT";
case IONIC_RC_EBUSY:
return "IONIC_RC_EBUSY";
case IONIC_RC_EEXIST:
return "IONIC_RC_EEXIST";
case IONIC_RC_EINVAL:
return "IONIC_RC_EINVAL";
case IONIC_RC_ENOSPC:
return "IONIC_RC_ENOSPC";
case IONIC_RC_ERANGE:
return "IONIC_RC_ERANGE";
case IONIC_RC_BAD_ADDR:
return "IONIC_RC_BAD_ADDR";
case IONIC_RC_DEV_CMD:
return "IONIC_RC_DEV_CMD";
case IONIC_RC_ERROR:
return "IONIC_RC_ERROR";
case IONIC_RC_ERDMA:
return "IONIC_RC_ERDMA";
default:
return "IONIC_RC_UNKNOWN";
}
}
static int ionic_error_to_errno(enum ionic_status_code code)
{
switch (code) {
case IONIC_RC_SUCCESS:
return 0;
case IONIC_RC_EVERSION:
case IONIC_RC_EQTYPE:
case IONIC_RC_EQID:
case IONIC_RC_EINVAL:
return -EINVAL;
case IONIC_RC_EPERM:
return -EPERM;
case IONIC_RC_ENOENT:
return -ENOENT;
case IONIC_RC_EAGAIN:
return -EAGAIN;
case IONIC_RC_ENOMEM:
return -ENOMEM;
case IONIC_RC_EFAULT:
return -EFAULT;
case IONIC_RC_EBUSY:
return -EBUSY;
case IONIC_RC_EEXIST:
return -EEXIST;
case IONIC_RC_ENOSPC:
return -ENOSPC;
case IONIC_RC_ERANGE:
return -ERANGE;
case IONIC_RC_BAD_ADDR:
return -EFAULT;
case IONIC_RC_EOPCODE:
case IONIC_RC_EINTR:
case IONIC_RC_DEV_CMD:
case IONIC_RC_ERROR:
case IONIC_RC_ERDMA:
case IONIC_RC_EIO:
default:
return -EIO;
}
}
static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode)
{
switch (opcode) {
case IONIC_CMD_NOP:
return "IONIC_CMD_NOP";
case IONIC_CMD_INIT:
return "IONIC_CMD_INIT";
case IONIC_CMD_RESET:
return "IONIC_CMD_RESET";
case IONIC_CMD_IDENTIFY:
return "IONIC_CMD_IDENTIFY";
case IONIC_CMD_GETATTR:
return "IONIC_CMD_GETATTR";
case IONIC_CMD_SETATTR:
return "IONIC_CMD_SETATTR";
case IONIC_CMD_PORT_IDENTIFY:
return "IONIC_CMD_PORT_IDENTIFY";
case IONIC_CMD_PORT_INIT:
return "IONIC_CMD_PORT_INIT";
case IONIC_CMD_PORT_RESET:
return "IONIC_CMD_PORT_RESET";
case IONIC_CMD_PORT_GETATTR:
return "IONIC_CMD_PORT_GETATTR";
case IONIC_CMD_PORT_SETATTR:
return "IONIC_CMD_PORT_SETATTR";
case IONIC_CMD_LIF_INIT:
return "IONIC_CMD_LIF_INIT";
case IONIC_CMD_LIF_RESET:
return "IONIC_CMD_LIF_RESET";
case IONIC_CMD_LIF_IDENTIFY:
return "IONIC_CMD_LIF_IDENTIFY";
case IONIC_CMD_LIF_SETATTR:
return "IONIC_CMD_LIF_SETATTR";
case IONIC_CMD_LIF_GETATTR:
return "IONIC_CMD_LIF_GETATTR";
case IONIC_CMD_RX_MODE_SET:
return "IONIC_CMD_RX_MODE_SET";
case IONIC_CMD_RX_FILTER_ADD:
return "IONIC_CMD_RX_FILTER_ADD";
case IONIC_CMD_RX_FILTER_DEL:
return "IONIC_CMD_RX_FILTER_DEL";
case IONIC_CMD_Q_INIT:
return "IONIC_CMD_Q_INIT";
case IONIC_CMD_Q_CONTROL:
return "IONIC_CMD_Q_CONTROL";
case IONIC_CMD_RDMA_RESET_LIF:
return "IONIC_CMD_RDMA_RESET_LIF";
case IONIC_CMD_RDMA_CREATE_EQ:
return "IONIC_CMD_RDMA_CREATE_EQ";
case IONIC_CMD_RDMA_CREATE_CQ:
return "IONIC_CMD_RDMA_CREATE_CQ";
case IONIC_CMD_RDMA_CREATE_ADMINQ:
return "IONIC_CMD_RDMA_CREATE_ADMINQ";
case IONIC_CMD_FW_DOWNLOAD:
return "IONIC_CMD_FW_DOWNLOAD";
case IONIC_CMD_FW_CONTROL:
return "IONIC_CMD_FW_CONTROL";
default:
return "DEVCMD_UNKNOWN";
}
}
int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
{
struct ionic_dev *idev = &ionic->idev;
unsigned long start_time;
unsigned long max_wait;
unsigned long duration;
int opcode;
int done;
int err;
WARN_ON(in_interrupt());
/* Wait for dev cmd to complete, retrying if we get EAGAIN,
* but don't wait any longer than max_seconds.
*/
max_wait = jiffies + (max_seconds * HZ);
try_again:
start_time = jiffies;
do {
done = ionic_dev_cmd_done(idev);
if (done)
break;
msleep(20);
} while (!done && time_before(jiffies, max_wait));
duration = jiffies - start_time;
opcode = idev->dev_cmd_regs->cmd.cmd.opcode;
dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
ionic_opcode_to_str(opcode), opcode,
done, duration / HZ, duration);
if (!done && !time_before(jiffies, max_wait)) {
dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
ionic_opcode_to_str(opcode), opcode, max_seconds);
return -ETIMEDOUT;
}
err = ionic_dev_cmd_status(&ionic->idev);
if (err) {
if (err == IONIC_RC_EAGAIN && !time_after(jiffies, max_wait)) {
dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) retrying...\n",
ionic_opcode_to_str(opcode), opcode,
ionic_error_to_str(err), err);
msleep(1000);
iowrite32(0, &idev->dev_cmd_regs->done);
iowrite32(1, &idev->dev_cmd_regs->doorbell);
goto try_again;
}
dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
ionic_opcode_to_str(opcode), opcode,
ionic_error_to_str(err), err);
return ionic_error_to_errno(err);
}
return 0;
}
int ionic_setup(struct ionic *ionic)
{
int err;
err = ionic_dev_setup(ionic);
if (err)
return err;
return 0;
}
int ionic_identify(struct ionic *ionic)
{
struct ionic_identity *ident = &ionic->ident;
struct ionic_dev *idev = &ionic->idev;
size_t sz;
int err;
memset(ident, 0, sizeof(*ident));
ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
strncpy(ident->drv.driver_ver_str, IONIC_DRV_VERSION,
sizeof(ident->drv.driver_ver_str) - 1);
mutex_lock(&ionic->dev_cmd_lock);
sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
if (!err) {
sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
}
mutex_unlock(&ionic->dev_cmd_lock);
if (err)
goto err_out_unmap;
ionic_debugfs_add_ident(ionic);
return 0;
err_out_unmap:
return err;
}
int ionic_init(struct ionic *ionic)
{
struct ionic_dev *idev = &ionic->idev;
int err;
mutex_lock(&ionic->dev_cmd_lock);
ionic_dev_cmd_init(idev);
err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
mutex_unlock(&ionic->dev_cmd_lock);
return err;
}
int ionic_reset(struct ionic *ionic)
{
struct ionic_dev *idev = &ionic->idev;
int err;
mutex_lock(&ionic->dev_cmd_lock);
ionic_dev_cmd_reset(idev);
err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
mutex_unlock(&ionic->dev_cmd_lock);
return err;
}
static int __init ionic_init_module(void)
{
pr_info("%s %s, ver %s\n",
IONIC_DRV_NAME, IONIC_DRV_DESCRIPTION, IONIC_DRV_VERSION);
ionic_debugfs_create();
return ionic_bus_register_driver();
}
static void __exit ionic_cleanup_module(void)
{
ionic_bus_unregister_driver();
ionic_debugfs_destroy();
pr_info("%s removed\n", IONIC_DRV_NAME);
}
module_init(ionic_init_module);
module_exit(ionic_cleanup_module);
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