[thirdparty/linux.git] / drivers / net / ethernet / pensando / ionic / ionic_main.c

// 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 <linux/vermagic.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");

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_ENOSUPP:
		return "IONIC_RC_ENOSUPP";
	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:
	case IONIC_RC_ENOSUPP:
		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";
	case IONIC_CMD_VF_GETATTR:
		return "IONIC_CMD_VF_GETATTR";
	case IONIC_CMD_VF_SETATTR:
		return "IONIC_CMD_VF_SETATTR";
	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;
	int err = 0;

	WARN_ON(in_interrupt());

	if (!lif->adminqcq)
		return -EIO;

	adminq = &lif->adminqcq->q;

	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) {
		if (!test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
			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 hb = 0;
	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);
		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) {
		/* It is possible (but unlikely) that FW was busy and missed a
		 * heartbeat check but is still alive and will process this
		 * request, so don't clean the dev_cmd in this case.
		 */
		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, UTS_RELEASE,
		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) {
		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\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)
{
	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);
Commit	Line	Data
df69ba43 SN	1	// SPDX-License-Identifier: GPL-2.0
	2	/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
	3
011c7289 AB	4	#include <linux/printk.h>
011c7289 AB	5	#include <linux/dynamic_debug.h>
df69ba43	6	#include <linux/module.h>
df69ba43 SN	7	#include <linux/netdevice.h>
df69ba43 SN	8	#include <linux/utsname.h>
1fcbebf1	9	#include <linux/vermagic.h>
df69ba43 SN	10
	11	#include "ionic.h"
	12	#include "ionic_bus.h"
1a58e196	13	#include "ionic_lif.h"
fbfb8031	14	#include "ionic_debugfs.h"
df69ba43 SN	15
	16	MODULE_DESCRIPTION(IONIC_DRV_DESCRIPTION);
	17	MODULE_AUTHOR("Pensando Systems, Inc");
	18	MODULE_LICENSE("GPL");
df69ba43	19
fbfb8031 SN	20	static const char *ionic_error_to_str(enum ionic_status_code code)
	21	{
	22	switch (code) {
	23	case IONIC_RC_SUCCESS:
	24	return "IONIC_RC_SUCCESS";
	25	case IONIC_RC_EVERSION:
	26	return "IONIC_RC_EVERSION";
	27	case IONIC_RC_EOPCODE:
	28	return "IONIC_RC_EOPCODE";
	29	case IONIC_RC_EIO:
	30	return "IONIC_RC_EIO";
	31	case IONIC_RC_EPERM:
	32	return "IONIC_RC_EPERM";
	33	case IONIC_RC_EQID:
	34	return "IONIC_RC_EQID";
	35	case IONIC_RC_EQTYPE:
	36	return "IONIC_RC_EQTYPE";
	37	case IONIC_RC_ENOENT:
	38	return "IONIC_RC_ENOENT";
	39	case IONIC_RC_EINTR:
	40	return "IONIC_RC_EINTR";
	41	case IONIC_RC_EAGAIN:
	42	return "IONIC_RC_EAGAIN";
	43	case IONIC_RC_ENOMEM:
	44	return "IONIC_RC_ENOMEM";
	45	case IONIC_RC_EFAULT:
	46	return "IONIC_RC_EFAULT";
	47	case IONIC_RC_EBUSY:
	48	return "IONIC_RC_EBUSY";
	49	case IONIC_RC_EEXIST:
	50	return "IONIC_RC_EEXIST";
	51	case IONIC_RC_EINVAL:
	52	return "IONIC_RC_EINVAL";
	53	case IONIC_RC_ENOSPC:
	54	return "IONIC_RC_ENOSPC";
	55	case IONIC_RC_ERANGE:
	56	return "IONIC_RC_ERANGE";
	57	case IONIC_RC_BAD_ADDR:
	58	return "IONIC_RC_BAD_ADDR";
	59	case IONIC_RC_DEV_CMD:
	60	return "IONIC_RC_DEV_CMD";
b2133d8d SN	61	case IONIC_RC_ENOSUPP:
b2133d8d SN	62	return "IONIC_RC_ENOSUPP";
fbfb8031 SN	63	case IONIC_RC_ERROR:
	64	return "IONIC_RC_ERROR";
	65	case IONIC_RC_ERDMA:
	66	return "IONIC_RC_ERDMA";
	67	default:
	68	return "IONIC_RC_UNKNOWN";
	69	}
	70	}
	71
	72	static int ionic_error_to_errno(enum ionic_status_code code)
	73	{
	74	switch (code) {
	75	case IONIC_RC_SUCCESS:
	76	return 0;
	77	case IONIC_RC_EVERSION:
	78	case IONIC_RC_EQTYPE:
	79	case IONIC_RC_EQID:
	80	case IONIC_RC_EINVAL:
b2133d8d	81	case IONIC_RC_ENOSUPP:
fbfb8031 SN	82	return -EINVAL;
	83	case IONIC_RC_EPERM:
	84	return -EPERM;
	85	case IONIC_RC_ENOENT:
	86	return -ENOENT;
	87	case IONIC_RC_EAGAIN:
	88	return -EAGAIN;
	89	case IONIC_RC_ENOMEM:
	90	return -ENOMEM;
	91	case IONIC_RC_EFAULT:
	92	return -EFAULT;
	93	case IONIC_RC_EBUSY:
	94	return -EBUSY;
	95	case IONIC_RC_EEXIST:
	96	return -EEXIST;
	97	case IONIC_RC_ENOSPC:
	98	return -ENOSPC;
	99	case IONIC_RC_ERANGE:
	100	return -ERANGE;
	101	case IONIC_RC_BAD_ADDR:
	102	return -EFAULT;
	103	case IONIC_RC_EOPCODE:
	104	case IONIC_RC_EINTR:
	105	case IONIC_RC_DEV_CMD:
	106	case IONIC_RC_ERROR:
	107	case IONIC_RC_ERDMA:
	108	case IONIC_RC_EIO:
	109	default:
	110	return -EIO;
	111	}
	112	}
	113
	114	static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode)
	115	{
	116	switch (opcode) {
	117	case IONIC_CMD_NOP:
	118	return "IONIC_CMD_NOP";
	119	case IONIC_CMD_INIT:
	120	return "IONIC_CMD_INIT";
	121	case IONIC_CMD_RESET:
	122	return "IONIC_CMD_RESET";
	123	case IONIC_CMD_IDENTIFY:
	124	return "IONIC_CMD_IDENTIFY";
	125	case IONIC_CMD_GETATTR:
	126	return "IONIC_CMD_GETATTR";
	127	case IONIC_CMD_SETATTR:
	128	return "IONIC_CMD_SETATTR";
	129	case IONIC_CMD_PORT_IDENTIFY:
	130	return "IONIC_CMD_PORT_IDENTIFY";
	131	case IONIC_CMD_PORT_INIT:
	132	return "IONIC_CMD_PORT_INIT";
	133	case IONIC_CMD_PORT_RESET:
	134	return "IONIC_CMD_PORT_RESET";
	135	case IONIC_CMD_PORT_GETATTR:
	136	return "IONIC_CMD_PORT_GETATTR";
	137	case IONIC_CMD_PORT_SETATTR:
	138	return "IONIC_CMD_PORT_SETATTR";
	139	case IONIC_CMD_LIF_INIT:
	140	return "IONIC_CMD_LIF_INIT";
	141	case IONIC_CMD_LIF_RESET:
	142	return "IONIC_CMD_LIF_RESET";
	143	case IONIC_CMD_LIF_IDENTIFY:
	144	return "IONIC_CMD_LIF_IDENTIFY";
	145	case IONIC_CMD_LIF_SETATTR:
146	return "IONIC_CMD_LIF_SETATTR";
147	case IONIC_CMD_LIF_GETATTR:
148	return "IONIC_CMD_LIF_GETATTR";
149	case IONIC_CMD_RX_MODE_SET:
150	return "IONIC_CMD_RX_MODE_SET";
151	case IONIC_CMD_RX_FILTER_ADD:
152	return "IONIC_CMD_RX_FILTER_ADD";
153	case IONIC_CMD_RX_FILTER_DEL:
154	return "IONIC_CMD_RX_FILTER_DEL";
155	case IONIC_CMD_Q_INIT:
156	return "IONIC_CMD_Q_INIT";
157	case IONIC_CMD_Q_CONTROL:
158	return "IONIC_CMD_Q_CONTROL";
159	case IONIC_CMD_RDMA_RESET_LIF:
160	return "IONIC_CMD_RDMA_RESET_LIF";
161	case IONIC_CMD_RDMA_CREATE_EQ:
162	return "IONIC_CMD_RDMA_CREATE_EQ";
163	case IONIC_CMD_RDMA_CREATE_CQ:
164	return "IONIC_CMD_RDMA_CREATE_CQ";
165	case IONIC_CMD_RDMA_CREATE_ADMINQ:
166	return "IONIC_CMD_RDMA_CREATE_ADMINQ";
167	case IONIC_CMD_FW_DOWNLOAD:
168	return "IONIC_CMD_FW_DOWNLOAD";
169	case IONIC_CMD_FW_CONTROL:
170	return "IONIC_CMD_FW_CONTROL";
fbb39807 SN	171	case IONIC_CMD_VF_GETATTR:
	172	return "IONIC_CMD_VF_GETATTR";
	173	case IONIC_CMD_VF_SETATTR:
	174	return "IONIC_CMD_VF_SETATTR";
fbfb8031 SN	175	default:
	176	return "DEVCMD_UNKNOWN";
	177	}
	178	}
	179
938962d5 SN	180	static void ionic_adminq_flush(struct ionic_lif *lif)
	181	{
	182	struct ionic_queue *adminq = &lif->adminqcq->q;
	183
	184	spin_lock(&lif->adminq_lock);
	185
	186	while (adminq->tail != adminq->head) {
	187	memset(adminq->tail->desc, 0, sizeof(union ionic_adminq_cmd));
	188	adminq->tail->cb = NULL;
	189	adminq->tail->cb_arg = NULL;
	190	adminq->tail = adminq->tail->next;
	191	}
	192	spin_unlock(&lif->adminq_lock);
	193	}
	194
	195	static int ionic_adminq_check_err(struct ionic_lif *lif,
	196	struct ionic_admin_ctx *ctx,
	197	bool timeout)
	198	{
	199	struct net_device *netdev = lif->netdev;
	200	const char *opcode_str;
	201	const char *status_str;
	202	int err = 0;
	203
	204	if (ctx->comp.comp.status \|\| timeout) {
	205	opcode_str = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
	206	status_str = ionic_error_to_str(ctx->comp.comp.status);
	207	err = timeout ? -ETIMEDOUT :
	208	ionic_error_to_errno(ctx->comp.comp.status);
	209
	210	netdev_err(netdev, "%s (%d) failed: %s (%d)\n",
	211	opcode_str, ctx->cmd.cmd.opcode,
	212	timeout ? "TIMEOUT" : status_str, err);
	213
	214	if (timeout)
	215	ionic_adminq_flush(lif);
	216	}
	217
	218	return err;
	219	}
	220
	221	static void ionic_adminq_cb(struct ionic_queue *q,
	222	struct ionic_desc_info *desc_info,
	223	struct ionic_cq_info cq_info, void cb_arg)
	224	{
	225	struct ionic_admin_ctx *ctx = cb_arg;
	226	struct ionic_admin_comp *comp;
	227	struct device *dev;
	228
	229	if (!ctx)
	230	return;
	231
	232	comp = cq_info->cq_desc;
	233	dev = &q->lif->netdev->dev;
	234
	235	memcpy(&ctx->comp, comp, sizeof(*comp));
	236
	237	dev_dbg(dev, "comp admin queue command:\n");
	238	dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
	239	&ctx->comp, sizeof(ctx->comp), true);
	240
	241	complete_all(&ctx->work);
	242	}
	243
244	static int ionic_adminq_post(struct ionic_lif lif, struct ionic_admin_ctx ctx)
245	{
a4674f34	246	struct ionic_queue *adminq;
938962d5 SN	247	int err = 0;
	248
	249	WARN_ON(in_interrupt());
	250
a4674f34 SN	251	if (!lif->adminqcq)
	252	return -EIO;
	253
	254	adminq = &lif->adminqcq->q;
	255
938962d5 SN	256	spin_lock(&lif->adminq_lock);
	257	if (!ionic_q_has_space(adminq, 1)) {
	258	err = -ENOSPC;
	259	goto err_out;
	260	}
	261
97ca4865 SN	262	err = ionic_heartbeat_check(lif->ionic);
	263	if (err)
	264	goto err_out;
	265
938962d5 SN	266	memcpy(adminq->head->desc, &ctx->cmd, sizeof(ctx->cmd));
	267
	268	dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
	269	dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
	270	&ctx->cmd, sizeof(ctx->cmd), true);
	271
	272	ionic_q_post(adminq, true, ionic_adminq_cb, ctx);
	273
	274	err_out:
	275	spin_unlock(&lif->adminq_lock);
	276
	277	return err;
	278	}
	279
	280	int ionic_adminq_post_wait(struct ionic_lif lif, struct ionic_admin_ctx ctx)
	281	{
	282	struct net_device *netdev = lif->netdev;
	283	unsigned long remaining;
	284	const char *name;
	285	int err;
	286
	287	err = ionic_adminq_post(lif, ctx);
	288	if (err) {
c672412f SN	289	if (!test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
	290	name = ionic_opcode_to_str(ctx->cmd.cmd.opcode);
	291	netdev_err(netdev, "Posting of %s (%d) failed: %d\n",
	292	name, ctx->cmd.cmd.opcode, err);
	293	}
938962d5 SN	294	return err;
	295	}
	296
	297	remaining = wait_for_completion_timeout(&ctx->work,
	298	HZ * (ulong)DEVCMD_TIMEOUT);
	299	return ionic_adminq_check_err(lif, ctx, (remaining == 0));
	300	}
	301
1d062b7b SN	302	int ionic_napi(struct napi_struct *napi, int budget, ionic_cq_cb cb,
	303	ionic_cq_done_cb done_cb, void *done_arg)
	304	{
	305	struct ionic_qcq *qcq = napi_to_qcq(napi);
	306	struct ionic_cq *cq = &qcq->cq;
	307	u32 work_done, flags = 0;
	308
	309	work_done = ionic_cq_service(cq, budget, cb, done_cb, done_arg);
	310
	311	if (work_done < budget && napi_complete_done(napi, work_done)) {
	312	flags \|= IONIC_INTR_CRED_UNMASK;
	313	DEBUG_STATS_INTR_REARM(cq->bound_intr);
	314	}
	315
	316	if (work_done \|\| flags) {
	317	flags \|= IONIC_INTR_CRED_RESET_COALESCE;
	318	ionic_intr_credits(cq->lif->ionic->idev.intr_ctrl,
	319	cq->bound_intr->index,
	320	work_done, flags);
	321	}
	322
	323	DEBUG_STATS_NAPI_POLL(qcq, work_done);
	324
	325	return work_done;
	326	}
	327
97ca4865 SN	328	static void ionic_dev_cmd_clean(struct ionic *ionic)
	329	{
	330	union ionic_dev_cmd_regs *regs = ionic->idev.dev_cmd_regs;
	331
	332	iowrite32(0, &regs->doorbell);
	333	memset_io(&regs->cmd, 0, sizeof(regs->cmd));
	334	}
	335
fbfb8031 SN	336	int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds)
	337	{
	338	struct ionic_dev *idev = &ionic->idev;
	339	unsigned long start_time;
	340	unsigned long max_wait;
	341	unsigned long duration;
	342	int opcode;
6be1a5ce	343	int hb = 0;
fbfb8031 SN	344	int done;
	345	int err;
	346
	347	WARN_ON(in_interrupt());
	348
	349	/* Wait for dev cmd to complete, retrying if we get EAGAIN,
	350	* but don't wait any longer than max_seconds.
	351	*/
	352	max_wait = jiffies + (max_seconds * HZ);
	353	try_again:
	354	start_time = jiffies;
	355	do {
	356	done = ionic_dev_cmd_done(idev);
	357	if (done)
	358	break;
	359	msleep(20);
97ca4865 SN	360	hb = ionic_heartbeat_check(ionic);
97ca4865 SN	361	} while (!done && !hb && time_before(jiffies, max_wait));
fbfb8031 SN	362	duration = jiffies - start_time;
	363
	364	opcode = idev->dev_cmd_regs->cmd.cmd.opcode;
	365	dev_dbg(ionic->dev, "DEVCMD %s (%d) done=%d took %ld secs (%ld jiffies)\n",
	366	ionic_opcode_to_str(opcode), opcode,
	367	done, duration / HZ, duration);
	368
97ca4865	369	if (!done && hb) {
2530ba5a SN	370	/* It is possible (but unlikely) that FW was busy and missed a
	371	* heartbeat check but is still alive and will process this
	372	* request, so don't clean the dev_cmd in this case.
	373	*/
97ca4865 SN	374	dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
	375	ionic_opcode_to_str(opcode), opcode);
	376	return -ENXIO;
	377	}
	378
fbfb8031	379	if (!done && !time_before(jiffies, max_wait)) {
97ca4865	380	ionic_dev_cmd_clean(ionic);
fbfb8031 SN	381	dev_warn(ionic->dev, "DEVCMD %s (%d) timeout after %ld secs\n",
	382	ionic_opcode_to_str(opcode), opcode, max_seconds);
	383	return -ETIMEDOUT;
	384	}
	385
	386	err = ionic_dev_cmd_status(&ionic->idev);
	387	if (err) {
	388	if (err == IONIC_RC_EAGAIN && !time_after(jiffies, max_wait)) {
	389	dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) retrying...\n",
	390	ionic_opcode_to_str(opcode), opcode,
	391	ionic_error_to_str(err), err);
	392
	393	msleep(1000);
	394	iowrite32(0, &idev->dev_cmd_regs->done);
	395	iowrite32(1, &idev->dev_cmd_regs->doorbell);
	396	goto try_again;
	397	}
	398
	399	dev_err(ionic->dev, "DEV_CMD %s (%d) error, %s (%d) failed\n",
	400	ionic_opcode_to_str(opcode), opcode,
	401	ionic_error_to_str(err), err);
	402
	403	return ionic_error_to_errno(err);
	404	}
	405
	406	return 0;
	407	}
	408
	409	int ionic_setup(struct ionic *ionic)
	410	{
	411	int err;
	412
	413	err = ionic_dev_setup(ionic);
	414	if (err)
	415	return err;
	416
	417	return 0;
	418	}
	419
	420	int ionic_identify(struct ionic *ionic)
	421	{
	422	struct ionic_identity *ident = &ionic->ident;
	423	struct ionic_dev *idev = &ionic->idev;
	424	size_t sz;
	425	int err;
	426
	427	memset(ident, 0, sizeof(*ident));
	428
	429	ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
1fcbebf1	430	strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
fbfb8031 SN	431	sizeof(ident->drv.driver_ver_str) - 1);
	432
	433	mutex_lock(&ionic->dev_cmd_lock);
	434
	435	sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
	436	memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
	437
	438	ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
	439	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	440	if (!err) {
	441	sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
	442	memcpy_fromio(&ident->dev, &idev->dev_cmd_regs->data, sz);
	443	}
	444
	445	mutex_unlock(&ionic->dev_cmd_lock);
	446
	447	if (err)
	448	goto err_out_unmap;
	449
	450	ionic_debugfs_add_ident(ionic);
	451
	452	return 0;
	453
	454	err_out_unmap:
	455	return err;
	456	}
	457
	458	int ionic_init(struct ionic *ionic)
	459	{
	460	struct ionic_dev *idev = &ionic->idev;
	461	int err;
	462
	463	mutex_lock(&ionic->dev_cmd_lock);
	464	ionic_dev_cmd_init(idev);
	465	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	466	mutex_unlock(&ionic->dev_cmd_lock);
	467
	468	return err;
	469	}
	470
	471	int ionic_reset(struct ionic *ionic)
	472	{
	473	struct ionic_dev *idev = &ionic->idev;
	474	int err;
	475
	476	mutex_lock(&ionic->dev_cmd_lock);
	477	ionic_dev_cmd_reset(idev);
	478	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	479	mutex_unlock(&ionic->dev_cmd_lock);
	480
	481	return err;
	482	}
	483
04436595 SN	484	int ionic_port_identify(struct ionic *ionic)
	485	{
	486	struct ionic_identity *ident = &ionic->ident;
	487	struct ionic_dev *idev = &ionic->idev;
	488	size_t sz;
	489	int err;
	490
	491	mutex_lock(&ionic->dev_cmd_lock);
	492
	493	ionic_dev_cmd_port_identify(idev);
	494	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	495	if (!err) {
	496	sz = min(sizeof(ident->port), sizeof(idev->dev_cmd_regs->data));
	497	memcpy_fromio(&ident->port, &idev->dev_cmd_regs->data, sz);
	498	}
	499
	500	mutex_unlock(&ionic->dev_cmd_lock);
	501
	502	return err;
	503	}
	504
	505	int ionic_port_init(struct ionic *ionic)
	506	{
	507	struct ionic_identity *ident = &ionic->ident;
	508	struct ionic_dev *idev = &ionic->idev;
	509	size_t sz;
	510	int err;
	511
04436595	512	if (!idev->port_info) {
ddc5911b SN	513	idev->port_info_sz = ALIGN(sizeof(*idev->port_info), PAGE_SIZE);
	514	idev->port_info = dma_alloc_coherent(ionic->dev,
	515	idev->port_info_sz,
	516	&idev->port_info_pa,
	517	GFP_KERNEL);
	518	if (!idev->port_info) {
	519	dev_err(ionic->dev, "Failed to allocate port info\n");
	520	return -ENOMEM;
	521	}
04436595 SN	522	}
	523
	524	sz = min(sizeof(ident->port.config), sizeof(idev->dev_cmd_regs->data));
	525
	526	mutex_lock(&ionic->dev_cmd_lock);
	527
	528	memcpy_toio(&idev->dev_cmd_regs->data, &ident->port.config, sz);
	529	ionic_dev_cmd_port_init(idev);
	530	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	531
	532	ionic_dev_cmd_port_state(&ionic->idev, IONIC_PORT_ADMIN_STATE_UP);
	533	(void)ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	534
	535	mutex_unlock(&ionic->dev_cmd_lock);
	536	if (err) {
	537	dev_err(ionic->dev, "Failed to init port\n");
	538	dma_free_coherent(ionic->dev, idev->port_info_sz,
	539	idev->port_info, idev->port_info_pa);
	540	idev->port_info = NULL;
	541	idev->port_info_pa = 0;
	542	}
	543
	544	return err;
	545	}
	546
	547	int ionic_port_reset(struct ionic *ionic)
	548	{
	549	struct ionic_dev *idev = &ionic->idev;
	550	int err;
	551
	552	if (!idev->port_info)
	553	return 0;
	554
	555	mutex_lock(&ionic->dev_cmd_lock);
	556	ionic_dev_cmd_port_reset(idev);
	557	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
	558	mutex_unlock(&ionic->dev_cmd_lock);
	559
	560	dma_free_coherent(ionic->dev, idev->port_info_sz,
	561	idev->port_info, idev->port_info_pa);
	562
	563	idev->port_info = NULL;
	564	idev->port_info_pa = 0;
	565
	566	if (err)
	567	dev_err(ionic->dev, "Failed to reset port\n");
	568
	569	return err;
	570	}
	571
df69ba43 SN	572	static int __init ionic_init_module(void)
df69ba43 SN	573	{
fbfb8031	574	ionic_debugfs_create();
df69ba43 SN	575	return ionic_bus_register_driver();
	576	}
	577
	578	static void __exit ionic_cleanup_module(void)
	579	{
	580	ionic_bus_unregister_driver();
fbfb8031	581	ionic_debugfs_destroy();
df69ba43 SN	582
	583	pr_info("%s removed\n", IONIC_DRV_NAME);
	584	}
	585
	586	module_init(ionic_init_module);
	587	module_exit(ionic_cleanup_module);