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// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */
#include <linux/list.h>
#include <linux/errno.h>
#include "iavf.h"
#include "iavf_prototype.h"
#include "iavf_client.h"
static
const char iavf_client_interface_version_str[] = IAVF_CLIENT_VERSION_STR;
static struct iavf_client *vf_registered_client;
static LIST_HEAD(i40e_devices);
static DEFINE_MUTEX(iavf_device_mutex);
static u32 iavf_client_virtchnl_send(struct iavf_info *ldev,
struct iavf_client *client,
u8 *msg, u16 len);
static int iavf_client_setup_qvlist(struct iavf_info *ldev,
struct iavf_client *client,
struct iavf_qvlist_info *qvlist_info);
static struct iavf_ops iavf_lan_ops = {
.virtchnl_send = iavf_client_virtchnl_send,
.setup_qvlist = iavf_client_setup_qvlist,
};
/**
* iavf_client_get_params - retrieve relevant client parameters
* @vsi: VSI with parameters
* @params: client param struct
**/
static
void iavf_client_get_params(struct iavf_vsi *vsi, struct iavf_params *params)
{
int i;
memset(params, 0, sizeof(struct iavf_params));
params->mtu = vsi->netdev->mtu;
params->link_up = vsi->back->link_up;
for (i = 0; i < IAVF_MAX_USER_PRIORITY; i++) {
params->qos.prio_qos[i].tc = 0;
params->qos.prio_qos[i].qs_handle = vsi->qs_handle;
}
}
/**
* iavf_notify_client_message - call the client message receive callback
* @vsi: the VSI associated with this client
* @msg: message buffer
* @len: length of message
*
* If there is a client to this VSI, call the client
**/
void iavf_notify_client_message(struct iavf_vsi *vsi, u8 *msg, u16 len)
{
struct iavf_client_instance *cinst;
if (!vsi)
return;
cinst = vsi->back->cinst;
if (!cinst || !cinst->client || !cinst->client->ops ||
!cinst->client->ops->virtchnl_receive) {
dev_dbg(&vsi->back->pdev->dev,
"Cannot locate client instance virtchnl_receive function\n");
return;
}
cinst->client->ops->virtchnl_receive(&cinst->lan_info, cinst->client,
msg, len);
}
/**
* iavf_notify_client_l2_params - call the client notify callback
* @vsi: the VSI with l2 param changes
*
* If there is a client to this VSI, call the client
**/
void iavf_notify_client_l2_params(struct iavf_vsi *vsi)
{
struct iavf_client_instance *cinst;
struct iavf_params params;
if (!vsi)
return;
cinst = vsi->back->cinst;
if (!cinst || !cinst->client || !cinst->client->ops ||
!cinst->client->ops->l2_param_change) {
dev_dbg(&vsi->back->pdev->dev,
"Cannot locate client instance l2_param_change function\n");
return;
}
iavf_client_get_params(vsi, ¶ms);
cinst->lan_info.params = params;
cinst->client->ops->l2_param_change(&cinst->lan_info, cinst->client,
¶ms);
}
/**
* iavf_notify_client_open - call the client open callback
* @vsi: the VSI with netdev opened
*
* If there is a client to this netdev, call the client with open
**/
void iavf_notify_client_open(struct iavf_vsi *vsi)
{
struct iavf_adapter *adapter = vsi->back;
struct iavf_client_instance *cinst = adapter->cinst;
int ret;
if (!cinst || !cinst->client || !cinst->client->ops ||
!cinst->client->ops->open) {
dev_dbg(&vsi->back->pdev->dev,
"Cannot locate client instance open function\n");
return;
}
if (!(test_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state))) {
ret = cinst->client->ops->open(&cinst->lan_info, cinst->client);
if (!ret)
set_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state);
}
}
/**
* iavf_client_release_qvlist - send a message to the PF to release iwarp qv map
* @ldev: pointer to L2 context.
*
* Return 0 on success or < 0 on error
**/
static int iavf_client_release_qvlist(struct iavf_info *ldev)
{
struct iavf_adapter *adapter = ldev->vf;
enum iavf_status err;
if (adapter->aq_required)
return -EAGAIN;
err = iavf_aq_send_msg_to_pf(&adapter->hw,
VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP,
IAVF_SUCCESS, NULL, 0, NULL);
if (err)
dev_err(&adapter->pdev->dev,
"Unable to send iWarp vector release message to PF, error %d, aq status %d\n",
err, adapter->hw.aq.asq_last_status);
return err;
}
/**
* iavf_notify_client_close - call the client close callback
* @vsi: the VSI with netdev closed
* @reset: true when close called due to reset pending
*
* If there is a client to this netdev, call the client with close
**/
void iavf_notify_client_close(struct iavf_vsi *vsi, bool reset)
{
struct iavf_adapter *adapter = vsi->back;
struct iavf_client_instance *cinst = adapter->cinst;
if (!cinst || !cinst->client || !cinst->client->ops ||
!cinst->client->ops->close) {
dev_dbg(&vsi->back->pdev->dev,
"Cannot locate client instance close function\n");
return;
}
cinst->client->ops->close(&cinst->lan_info, cinst->client, reset);
iavf_client_release_qvlist(&cinst->lan_info);
clear_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state);
}
/**
* iavf_client_add_instance - add a client instance to the instance list
* @adapter: pointer to the board struct
*
* Returns cinst ptr on success, NULL on failure
**/
static struct iavf_client_instance *
iavf_client_add_instance(struct iavf_adapter *adapter)
{
struct iavf_client_instance *cinst = NULL;
struct iavf_vsi *vsi = &adapter->vsi;
struct netdev_hw_addr *mac = NULL;
struct iavf_params params;
if (!vf_registered_client)
goto out;
if (adapter->cinst) {
cinst = adapter->cinst;
goto out;
}
cinst = kzalloc(sizeof(*cinst), GFP_KERNEL);
if (!cinst)
goto out;
cinst->lan_info.vf = (void *)adapter;
cinst->lan_info.netdev = vsi->netdev;
cinst->lan_info.pcidev = adapter->pdev;
cinst->lan_info.fid = 0;
cinst->lan_info.ftype = IAVF_CLIENT_FTYPE_VF;
cinst->lan_info.hw_addr = adapter->hw.hw_addr;
cinst->lan_info.ops = &iavf_lan_ops;
cinst->lan_info.version.major = IAVF_CLIENT_VERSION_MAJOR;
cinst->lan_info.version.minor = IAVF_CLIENT_VERSION_MINOR;
cinst->lan_info.version.build = IAVF_CLIENT_VERSION_BUILD;
iavf_client_get_params(vsi, ¶ms);
cinst->lan_info.params = params;
set_bit(__IAVF_CLIENT_INSTANCE_NONE, &cinst->state);
cinst->lan_info.msix_count = adapter->num_iwarp_msix;
cinst->lan_info.msix_entries =
&adapter->msix_entries[adapter->iwarp_base_vector];
mac = list_first_entry(&cinst->lan_info.netdev->dev_addrs.list,
struct netdev_hw_addr, list);
if (mac)
ether_addr_copy(cinst->lan_info.lanmac, mac->addr);
else
dev_err(&adapter->pdev->dev, "MAC address list is empty!\n");
cinst->client = vf_registered_client;
adapter->cinst = cinst;
out:
return cinst;
}
/**
* iavf_client_del_instance - removes a client instance from the list
* @adapter: pointer to the board struct
*
**/
static
void iavf_client_del_instance(struct iavf_adapter *adapter)
{
kfree(adapter->cinst);
adapter->cinst = NULL;
}
/**
* iavf_client_subtask - client maintenance work
* @adapter: board private structure
**/
void iavf_client_subtask(struct iavf_adapter *adapter)
{
struct iavf_client *client = vf_registered_client;
struct iavf_client_instance *cinst;
int ret = 0;
if (adapter->state < __IAVF_DOWN)
return;
/* first check client is registered */
if (!client)
return;
/* Add the client instance to the instance list */
cinst = iavf_client_add_instance(adapter);
if (!cinst)
return;
dev_info(&adapter->pdev->dev, "Added instance of Client %s\n",
client->name);
if (!test_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state)) {
/* Send an Open request to the client */
if (client->ops && client->ops->open)
ret = client->ops->open(&cinst->lan_info, client);
if (!ret)
set_bit(__IAVF_CLIENT_INSTANCE_OPENED,
&cinst->state);
else
/* remove client instance */
iavf_client_del_instance(adapter);
}
}
/**
* iavf_lan_add_device - add a lan device struct to the list of lan devices
* @adapter: pointer to the board struct
*
* Returns 0 on success or none 0 on error
**/
int iavf_lan_add_device(struct iavf_adapter *adapter)
{
struct i40e_device *ldev;
int ret = 0;
mutex_lock(&iavf_device_mutex);
list_for_each_entry(ldev, &i40e_devices, list) {
if (ldev->vf == adapter) {
ret = -EEXIST;
goto out;
}
}
ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
if (!ldev) {
ret = -ENOMEM;
goto out;
}
ldev->vf = adapter;
INIT_LIST_HEAD(&ldev->list);
list_add(&ldev->list, &i40e_devices);
dev_info(&adapter->pdev->dev, "Added LAN device bus=0x%02x dev=0x%02x func=0x%02x\n",
adapter->hw.bus.bus_id, adapter->hw.bus.device,
adapter->hw.bus.func);
/* Since in some cases register may have happened before a device gets
* added, we can schedule a subtask to go initiate the clients.
*/
adapter->flags |= IAVF_FLAG_SERVICE_CLIENT_REQUESTED;
out:
mutex_unlock(&iavf_device_mutex);
return ret;
}
/**
* iavf_lan_del_device - removes a lan device from the device list
* @adapter: pointer to the board struct
*
* Returns 0 on success or non-0 on error
**/
int iavf_lan_del_device(struct iavf_adapter *adapter)
{
struct i40e_device *ldev, *tmp;
int ret = -ENODEV;
mutex_lock(&iavf_device_mutex);
list_for_each_entry_safe(ldev, tmp, &i40e_devices, list) {
if (ldev->vf == adapter) {
dev_info(&adapter->pdev->dev,
"Deleted LAN device bus=0x%02x dev=0x%02x func=0x%02x\n",
adapter->hw.bus.bus_id, adapter->hw.bus.device,
adapter->hw.bus.func);
list_del(&ldev->list);
kfree(ldev);
ret = 0;
break;
}
}
mutex_unlock(&iavf_device_mutex);
return ret;
}
/**
* iavf_client_release - release client specific resources
* @client: pointer to the registered client
*
**/
static void iavf_client_release(struct iavf_client *client)
{
struct iavf_client_instance *cinst;
struct i40e_device *ldev;
struct iavf_adapter *adapter;
mutex_lock(&iavf_device_mutex);
list_for_each_entry(ldev, &i40e_devices, list) {
adapter = ldev->vf;
cinst = adapter->cinst;
if (!cinst)
continue;
if (test_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state)) {
if (client->ops && client->ops->close)
client->ops->close(&cinst->lan_info, client,
false);
iavf_client_release_qvlist(&cinst->lan_info);
clear_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state);
dev_warn(&adapter->pdev->dev,
"Client %s instance closed\n", client->name);
}
/* delete the client instance */
iavf_client_del_instance(adapter);
dev_info(&adapter->pdev->dev, "Deleted client instance of Client %s\n",
client->name);
}
mutex_unlock(&iavf_device_mutex);
}
/**
* iavf_client_prepare - prepare client specific resources
* @client: pointer to the registered client
*
**/
static void iavf_client_prepare(struct iavf_client *client)
{
struct i40e_device *ldev;
struct iavf_adapter *adapter;
mutex_lock(&iavf_device_mutex);
list_for_each_entry(ldev, &i40e_devices, list) {
adapter = ldev->vf;
/* Signal the watchdog to service the client */
adapter->flags |= IAVF_FLAG_SERVICE_CLIENT_REQUESTED;
}
mutex_unlock(&iavf_device_mutex);
}
/**
* iavf_client_virtchnl_send - send a message to the PF instance
* @ldev: pointer to L2 context.
* @client: Client pointer.
* @msg: pointer to message buffer
* @len: message length
*
* Return 0 on success or < 0 on error
**/
static u32 iavf_client_virtchnl_send(struct iavf_info *ldev,
struct iavf_client *client,
u8 *msg, u16 len)
{
struct iavf_adapter *adapter = ldev->vf;
enum iavf_status err;
if (adapter->aq_required)
return -EAGAIN;
err = iavf_aq_send_msg_to_pf(&adapter->hw, VIRTCHNL_OP_IWARP,
IAVF_SUCCESS, msg, len, NULL);
if (err)
dev_err(&adapter->pdev->dev, "Unable to send iWarp message to PF, error %d, aq status %d\n",
err, adapter->hw.aq.asq_last_status);
return err;
}
/**
* iavf_client_setup_qvlist - send a message to the PF to setup iwarp qv map
* @ldev: pointer to L2 context.
* @client: Client pointer.
* @qvlist_info: queue and vector list
*
* Return 0 on success or < 0 on error
**/
static int iavf_client_setup_qvlist(struct iavf_info *ldev,
struct iavf_client *client,
struct iavf_qvlist_info *qvlist_info)
{
struct virtchnl_iwarp_qvlist_info *v_qvlist_info;
struct iavf_adapter *adapter = ldev->vf;
struct iavf_qv_info *qv_info;
enum iavf_status err;
u32 v_idx, i;
size_t msg_size;
if (adapter->aq_required)
return -EAGAIN;
/* A quick check on whether the vectors belong to the client */
for (i = 0; i < qvlist_info->num_vectors; i++) {
qv_info = &qvlist_info->qv_info[i];
if (!qv_info)
continue;
v_idx = qv_info->v_idx;
if ((v_idx >=
(adapter->iwarp_base_vector + adapter->num_iwarp_msix)) ||
(v_idx < adapter->iwarp_base_vector))
return -EINVAL;
}
v_qvlist_info = (struct virtchnl_iwarp_qvlist_info *)qvlist_info;
msg_size = struct_size(v_qvlist_info, qv_info,
v_qvlist_info->num_vectors - 1);
adapter->client_pending |= BIT(VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP);
err = iavf_aq_send_msg_to_pf(&adapter->hw,
VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP, IAVF_SUCCESS,
(u8 *)v_qvlist_info, msg_size, NULL);
if (err) {
dev_err(&adapter->pdev->dev,
"Unable to send iWarp vector config message to PF, error %d, aq status %d\n",
err, adapter->hw.aq.asq_last_status);
goto out;
}
err = -EBUSY;
for (i = 0; i < 5; i++) {
msleep(100);
if (!(adapter->client_pending &
BIT(VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP))) {
err = 0;
break;
}
}
out:
return err;
}
/**
* iavf_register_client - Register a i40e client driver with the L2 driver
* @client: pointer to the iavf_client struct
*
* Returns 0 on success or non-0 on error
**/
int iavf_register_client(struct iavf_client *client)
{
int ret = 0;
if (!client) {
ret = -EIO;
goto out;
}
if (strlen(client->name) == 0) {
pr_info("iavf: Failed to register client with no name\n");
ret = -EIO;
goto out;
}
if (vf_registered_client) {
pr_info("iavf: Client %s has already been registered!\n",
client->name);
ret = -EEXIST;
goto out;
}
if ((client->version.major != IAVF_CLIENT_VERSION_MAJOR) ||
(client->version.minor != IAVF_CLIENT_VERSION_MINOR)) {
pr_info("iavf: Failed to register client %s due to mismatched client interface version\n",
client->name);
pr_info("Client is using version: %02d.%02d.%02d while LAN driver supports %s\n",
client->version.major, client->version.minor,
client->version.build,
iavf_client_interface_version_str);
ret = -EIO;
goto out;
}
vf_registered_client = client;
iavf_client_prepare(client);
pr_info("iavf: Registered client %s with return code %d\n",
client->name, ret);
out:
return ret;
}
EXPORT_SYMBOL(iavf_register_client);
/**
* iavf_unregister_client - Unregister a i40e client driver with the L2 driver
* @client: pointer to the iavf_client struct
*
* Returns 0 on success or non-0 on error
**/
int iavf_unregister_client(struct iavf_client *client)
{
int ret = 0;
/* When a unregister request comes through we would have to send
* a close for each of the client instances that were opened.
* client_release function is called to handle this.
*/
iavf_client_release(client);
if (vf_registered_client != client) {
pr_info("iavf: Client %s has not been registered\n",
client->name);
ret = -ENODEV;
goto out;
}
vf_registered_client = NULL;
pr_info("iavf: Unregistered client %s\n", client->name);
out:
return ret;
}
EXPORT_SYMBOL(iavf_unregister_client);
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