blob: 3590ea7fd88a3e351a09c2a73a506f6f122fa27e [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
#include <linux/printk.h>
#include <linux/dynamic_debug.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/utsname.h>
#include "ionic.h"
#include "ionic_bus.h"
#include "ionic_lif.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";
}
}
static void ionic_adminq_flush(struct ionic_lif *lif)
{
struct ionic_queue *adminq = &lif->adminqcq->q;
spin_lock(&lif->adminq_lock);
while (adminq->tail != adminq->head) {
memset(adminq->tail->desc, 0, sizeof(union ionic_adminq_cmd));
adminq->tail->cb = NULL;
adminq->tail->cb_arg = NULL;
adminq->tail = adminq->tail->next;
}
spin_unlock(&lif->adminq_lock);
}
static int ionic_adminq_check_err(struct ionic_lif *lif,
struct ionic_admin_ctx *ctx,
bool timeout)
{
struct net_device *netdev = lif->netdev;
const char *opcode_str;
const char *status_str;
int err = 0;
if (ctx->comp.comp.status || timeout) {
opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
status_str = ionic_error_to_str(ctx->comp.comp.status);
err = timeout ? -ETIMEDOUT :
ionic_error_to_errno(ctx->comp.comp.status);
netdev_err(netdev, "%s (%d) failed: %s (%d)\n",
opcode_str, ctx->cmd.cmd.opcode,
timeout ? "TIMEOUT" : status_str, err);
if (timeout)
ionic_adminq_flush(lif);
}
return err;
}
static void ionic_adminq_cb(struct ionic_queue *q,
struct ionic_desc_info *desc_info,
struct ionic_cq_info *cq_info, void *cb_arg)
{
struct ionic_admin_ctx *ctx = cb_arg;
struct ionic_admin_comp *comp;
struct device *dev;
if (!ctx)
return;
comp = cq_info->cq_desc;
dev = &q->lif->netdev->dev;
memcpy(&ctx->comp, comp, sizeof(*comp));
dev_dbg(dev, "comp admin queue command:\n");
dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
&ctx->comp, sizeof(ctx->comp), true);
complete_all(&ctx->work);
}
static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
{
struct ionic_queue *adminq = &lif->adminqcq->q;
int err = 0;
WARN_ON(in_interrupt());
spin_lock(&lif->adminq_lock);
if (!ionic_q_has_space(adminq, 1)) {
err = -ENOSPC;
goto err_out;
}
err = ionic_heartbeat_check(lif->ionic);
if (err)
goto err_out;
memcpy(adminq->head->desc, &ctx->cmd, sizeof(ctx->cmd));
dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
&ctx->cmd, sizeof(ctx->cmd), true);
ionic_q_post(adminq, true, ionic_adminq_cb, ctx);
err_out:
spin_unlock(&lif->adminq_lock);
return err;
}
int ionic_adminq_post_wait(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
{
struct net_device *netdev = lif->netdev;
unsigned long remaining;
const char *name;
int err;
err = ionic_adminq_post(lif, ctx);
if (err) {
name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
name, ctx->cmd.cmd.opcode, err);
return err;
}
remaining = wait_for_completion_timeout(&ctx->work,
HZ * (ulong)DEVCMD_TIMEOUT);
return ionic_adminq_check_err(lif, ctx, (remaining == 0));
}
int ionic_napi(struct napi_struct *napi, int budget, ionic_cq_cb cb,
ionic_cq_done_cb done_cb, void *done_arg)
{
struct ionic_qcq *qcq = napi_to_qcq(napi);
struct ionic_cq *cq = &qcq->cq;
u32 work_done, flags = 0;
work_done = ionic_cq_service(cq, budget, cb, done_cb, done_arg);
if (work_done < budget && napi_complete_done(napi, work_done)) {
flags |= IONIC_INTR_CRED_UNMASK;
DEBUG_STATS_INTR_REARM(cq->bound_intr);
}
if (work_done || flags) {
flags |= IONIC_INTR_CRED_RESET_COALESCE;
ionic_intr_credits(cq->lif->ionic->idev.intr_ctrl,
cq->bound_intr->index,
work_done, flags);
}
DEBUG_STATS_NAPI_POLL(qcq, work_done);
return work_done;
}
static void ionic_dev_cmd_clean(struct ionic *ionic)
{
union ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
iowrite32(0, &regs->doorbell);
memset_io(&regs->cmd, 0, sizeof(regs->cmd));
}
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;
int hb;
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);
hb = ionic_heartbeat_check(ionic);
} while (!done && !hb && 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 && hb) {
ionic_dev_cmd_clean(ionic);
dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
ionic_opcode_to_str(opcode), opcode);
return -ENXIO;
}
if (!done && !time_before(jiffies, max_wait)) {
ionic_dev_cmd_clean(ionic);
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;
}
int ionic_port_identify(struct ionic *ionic)
{
struct ionic_identity *ident = &ionic->ident;
struct ionic_dev *idev = &ionic->idev;
size_t sz;
int err;
mutex_lock(&ionic->dev_cmd_lock);
ionic_dev_cmd_port_identify(idev);
err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
if (!err) {
sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
}
mutex_unlock(&ionic->dev_cmd_lock);
return err;
}
int ionic_port_init(struct ionic *ionic)
{
struct ionic_identity *ident = &ionic->ident;
struct ionic_dev *idev = &ionic->idev;
size_t sz;
int err;
if (idev->port_info)
return 0;
idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
idev->port_info = dma_alloc_coherent(ionic->dev, idev->port_info_sz,
&idev->port_info_pa,
GFP_KERNEL);
if (!idev->port_info) {
dev_err(ionic->dev, "Failed to allocate port info, aborting\n");
return -ENOMEM;
}
sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
mutex_lock(&ionic->dev_cmd_lock);
memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
ionic_dev_cmd_port_init(idev);
err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
(void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
mutex_unlock(&ionic->dev_cmd_lock);
if (err) {
dev_err(ionic->dev, "Failed to init port\n");
dma_free_coherent(ionic->dev, idev->port_info_sz,
idev->port_info, idev->port_info_pa);
idev->port_info = NULL;
idev->port_info_pa = 0;
}
return err;
}
int ionic_port_reset(struct ionic *ionic)
{
struct ionic_dev *idev = &ionic->idev;
int err;
if (!idev->port_info)
return 0;
mutex_lock(&ionic->dev_cmd_lock);
ionic_dev_cmd_port_reset(idev);
err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
mutex_unlock(&ionic->dev_cmd_lock);
dma_free_coherent(ionic->dev, idev->port_info_sz,
idev->port_info, idev->port_info_pa);
idev->port_info = NULL;
idev->port_info_pa = 0;
if (err)
dev_err(ionic->dev, "Failed to reset port\n");
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);