ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/net/ncsi/ncsi-manage.c b/marvell/linux/net/ncsi/ncsi-manage.c
new file mode 100644
index 0000000..6710f6b
--- /dev/null
+++ b/marvell/linux/net/ncsi/ncsi-manage.c
@@ -0,0 +1,1831 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright Gavin Shan, IBM Corporation 2016.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+
+#include <net/ncsi.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
+#include <net/addrconf.h>
+#include <net/ipv6.h>
+#include <net/genetlink.h>
+
+#include "internal.h"
+#include "ncsi-pkt.h"
+#include "ncsi-netlink.h"
+
+LIST_HEAD(ncsi_dev_list);
+DEFINE_SPINLOCK(ncsi_dev_lock);
+
+bool ncsi_channel_has_link(struct ncsi_channel *channel)
+{
+ return !!(channel->modes[NCSI_MODE_LINK].data[2] & 0x1);
+}
+
+bool ncsi_channel_is_last(struct ncsi_dev_priv *ndp,
+ struct ncsi_channel *channel)
+{
+ struct ncsi_package *np;
+ struct ncsi_channel *nc;
+
+ NCSI_FOR_EACH_PACKAGE(ndp, np)
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ if (nc == channel)
+ continue;
+ if (nc->state == NCSI_CHANNEL_ACTIVE &&
+ ncsi_channel_has_link(nc))
+ return false;
+ }
+
+ return true;
+}
+
+static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down)
+{
+ struct ncsi_dev *nd = &ndp->ndev;
+ struct ncsi_package *np;
+ struct ncsi_channel *nc;
+ unsigned long flags;
+
+ nd->state = ncsi_dev_state_functional;
+ if (force_down) {
+ nd->link_up = 0;
+ goto report;
+ }
+
+ nd->link_up = 0;
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ spin_lock_irqsave(&nc->lock, flags);
+
+ if (!list_empty(&nc->link) ||
+ nc->state != NCSI_CHANNEL_ACTIVE) {
+ spin_unlock_irqrestore(&nc->lock, flags);
+ continue;
+ }
+
+ if (ncsi_channel_has_link(nc)) {
+ spin_unlock_irqrestore(&nc->lock, flags);
+ nd->link_up = 1;
+ goto report;
+ }
+
+ spin_unlock_irqrestore(&nc->lock, flags);
+ }
+ }
+
+report:
+ nd->handler(nd);
+}
+
+static void ncsi_channel_monitor(struct timer_list *t)
+{
+ struct ncsi_channel *nc = from_timer(nc, t, monitor.timer);
+ struct ncsi_package *np = nc->package;
+ struct ncsi_dev_priv *ndp = np->ndp;
+ struct ncsi_channel_mode *ncm;
+ struct ncsi_cmd_arg nca;
+ bool enabled, chained;
+ unsigned int monitor_state;
+ unsigned long flags;
+ int state, ret;
+
+ spin_lock_irqsave(&nc->lock, flags);
+ state = nc->state;
+ chained = !list_empty(&nc->link);
+ enabled = nc->monitor.enabled;
+ monitor_state = nc->monitor.state;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ if (!enabled)
+ return; /* expected race disabling timer */
+ if (WARN_ON_ONCE(chained))
+ goto bad_state;
+
+ if (state != NCSI_CHANNEL_INACTIVE &&
+ state != NCSI_CHANNEL_ACTIVE) {
+bad_state:
+ netdev_warn(ndp->ndev.dev,
+ "Bad NCSI monitor state channel %d 0x%x %s queue\n",
+ nc->id, state, chained ? "on" : "off");
+ spin_lock_irqsave(&nc->lock, flags);
+ nc->monitor.enabled = false;
+ spin_unlock_irqrestore(&nc->lock, flags);
+ return;
+ }
+
+ switch (monitor_state) {
+ case NCSI_CHANNEL_MONITOR_START:
+ case NCSI_CHANNEL_MONITOR_RETRY:
+ nca.ndp = ndp;
+ nca.package = np->id;
+ nca.channel = nc->id;
+ nca.type = NCSI_PKT_CMD_GLS;
+ nca.req_flags = 0;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ netdev_err(ndp->ndev.dev, "Error %d sending GLS\n",
+ ret);
+ break;
+ case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX:
+ break;
+ default:
+ netdev_err(ndp->ndev.dev, "NCSI Channel %d timed out!\n",
+ nc->id);
+ ncsi_report_link(ndp, true);
+ ndp->flags |= NCSI_DEV_RESHUFFLE;
+
+ ncm = &nc->modes[NCSI_MODE_LINK];
+ spin_lock_irqsave(&nc->lock, flags);
+ nc->monitor.enabled = false;
+ nc->state = NCSI_CHANNEL_INVISIBLE;
+ ncm->data[2] &= ~0x1;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ nc->state = NCSI_CHANNEL_ACTIVE;
+ list_add_tail_rcu(&nc->link, &ndp->channel_queue);
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ ncsi_process_next_channel(ndp);
+ return;
+ }
+
+ spin_lock_irqsave(&nc->lock, flags);
+ nc->monitor.state++;
+ spin_unlock_irqrestore(&nc->lock, flags);
+ mod_timer(&nc->monitor.timer, jiffies + HZ);
+}
+
+void ncsi_start_channel_monitor(struct ncsi_channel *nc)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&nc->lock, flags);
+ WARN_ON_ONCE(nc->monitor.enabled);
+ nc->monitor.enabled = true;
+ nc->monitor.state = NCSI_CHANNEL_MONITOR_START;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ mod_timer(&nc->monitor.timer, jiffies + HZ);
+}
+
+void ncsi_stop_channel_monitor(struct ncsi_channel *nc)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&nc->lock, flags);
+ if (!nc->monitor.enabled) {
+ spin_unlock_irqrestore(&nc->lock, flags);
+ return;
+ }
+ nc->monitor.enabled = false;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ del_timer_sync(&nc->monitor.timer);
+}
+
+struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np,
+ unsigned char id)
+{
+ struct ncsi_channel *nc;
+
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ if (nc->id == id)
+ return nc;
+ }
+
+ return NULL;
+}
+
+struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, unsigned char id)
+{
+ struct ncsi_channel *nc, *tmp;
+ int index;
+ unsigned long flags;
+
+ nc = kzalloc(sizeof(*nc), GFP_ATOMIC);
+ if (!nc)
+ return NULL;
+
+ nc->id = id;
+ nc->package = np;
+ nc->state = NCSI_CHANNEL_INACTIVE;
+ nc->monitor.enabled = false;
+ timer_setup(&nc->monitor.timer, ncsi_channel_monitor, 0);
+ spin_lock_init(&nc->lock);
+ INIT_LIST_HEAD(&nc->link);
+ for (index = 0; index < NCSI_CAP_MAX; index++)
+ nc->caps[index].index = index;
+ for (index = 0; index < NCSI_MODE_MAX; index++)
+ nc->modes[index].index = index;
+
+ spin_lock_irqsave(&np->lock, flags);
+ tmp = ncsi_find_channel(np, id);
+ if (tmp) {
+ spin_unlock_irqrestore(&np->lock, flags);
+ kfree(nc);
+ return tmp;
+ }
+
+ list_add_tail_rcu(&nc->node, &np->channels);
+ np->channel_num++;
+ spin_unlock_irqrestore(&np->lock, flags);
+
+ return nc;
+}
+
+static void ncsi_remove_channel(struct ncsi_channel *nc)
+{
+ struct ncsi_package *np = nc->package;
+ unsigned long flags;
+
+ spin_lock_irqsave(&nc->lock, flags);
+
+ /* Release filters */
+ kfree(nc->mac_filter.addrs);
+ kfree(nc->vlan_filter.vids);
+
+ nc->state = NCSI_CHANNEL_INACTIVE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+ ncsi_stop_channel_monitor(nc);
+
+ /* Remove and free channel */
+ spin_lock_irqsave(&np->lock, flags);
+ list_del_rcu(&nc->node);
+ np->channel_num--;
+ spin_unlock_irqrestore(&np->lock, flags);
+
+ kfree(nc);
+}
+
+struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp,
+ unsigned char id)
+{
+ struct ncsi_package *np;
+
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ if (np->id == id)
+ return np;
+ }
+
+ return NULL;
+}
+
+struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp,
+ unsigned char id)
+{
+ struct ncsi_package *np, *tmp;
+ unsigned long flags;
+
+ np = kzalloc(sizeof(*np), GFP_ATOMIC);
+ if (!np)
+ return NULL;
+
+ np->id = id;
+ np->ndp = ndp;
+ spin_lock_init(&np->lock);
+ INIT_LIST_HEAD(&np->channels);
+ np->channel_whitelist = UINT_MAX;
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ tmp = ncsi_find_package(ndp, id);
+ if (tmp) {
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ kfree(np);
+ return tmp;
+ }
+
+ list_add_tail_rcu(&np->node, &ndp->packages);
+ ndp->package_num++;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ return np;
+}
+
+void ncsi_remove_package(struct ncsi_package *np)
+{
+ struct ncsi_dev_priv *ndp = np->ndp;
+ struct ncsi_channel *nc, *tmp;
+ unsigned long flags;
+
+ /* Release all child channels */
+ list_for_each_entry_safe(nc, tmp, &np->channels, node)
+ ncsi_remove_channel(nc);
+
+ /* Remove and free package */
+ spin_lock_irqsave(&ndp->lock, flags);
+ list_del_rcu(&np->node);
+ ndp->package_num--;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ kfree(np);
+}
+
+void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp,
+ unsigned char id,
+ struct ncsi_package **np,
+ struct ncsi_channel **nc)
+{
+ struct ncsi_package *p;
+ struct ncsi_channel *c;
+
+ p = ncsi_find_package(ndp, NCSI_PACKAGE_INDEX(id));
+ c = p ? ncsi_find_channel(p, NCSI_CHANNEL_INDEX(id)) : NULL;
+
+ if (np)
+ *np = p;
+ if (nc)
+ *nc = c;
+}
+
+/* For two consecutive NCSI commands, the packet IDs shouldn't
+ * be same. Otherwise, the bogus response might be replied. So
+ * the available IDs are allocated in round-robin fashion.
+ */
+struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp,
+ unsigned int req_flags)
+{
+ struct ncsi_request *nr = NULL;
+ int i, limit = ARRAY_SIZE(ndp->requests);
+ unsigned long flags;
+
+ /* Check if there is one available request until the ceiling */
+ spin_lock_irqsave(&ndp->lock, flags);
+ for (i = ndp->request_id; i < limit; i++) {
+ if (ndp->requests[i].used)
+ continue;
+
+ nr = &ndp->requests[i];
+ nr->used = true;
+ nr->flags = req_flags;
+ ndp->request_id = i + 1;
+ goto found;
+ }
+
+ /* Fail back to check from the starting cursor */
+ for (i = NCSI_REQ_START_IDX; i < ndp->request_id; i++) {
+ if (ndp->requests[i].used)
+ continue;
+
+ nr = &ndp->requests[i];
+ nr->used = true;
+ nr->flags = req_flags;
+ ndp->request_id = i + 1;
+ goto found;
+ }
+
+found:
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return nr;
+}
+
+void ncsi_free_request(struct ncsi_request *nr)
+{
+ struct ncsi_dev_priv *ndp = nr->ndp;
+ struct sk_buff *cmd, *rsp;
+ unsigned long flags;
+ bool driven;
+
+ if (nr->enabled) {
+ nr->enabled = false;
+ del_timer_sync(&nr->timer);
+ }
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ cmd = nr->cmd;
+ rsp = nr->rsp;
+ nr->cmd = NULL;
+ nr->rsp = NULL;
+ nr->used = false;
+ driven = !!(nr->flags & NCSI_REQ_FLAG_EVENT_DRIVEN);
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ if (driven && cmd && --ndp->pending_req_num == 0)
+ schedule_work(&ndp->work);
+
+ /* Release command and response */
+ consume_skb(cmd);
+ consume_skb(rsp);
+}
+
+struct ncsi_dev *ncsi_find_dev(struct net_device *dev)
+{
+ struct ncsi_dev_priv *ndp;
+
+ NCSI_FOR_EACH_DEV(ndp) {
+ if (ndp->ndev.dev == dev)
+ return &ndp->ndev;
+ }
+
+ return NULL;
+}
+
+static void ncsi_request_timeout(struct timer_list *t)
+{
+ struct ncsi_request *nr = from_timer(nr, t, timer);
+ struct ncsi_dev_priv *ndp = nr->ndp;
+ struct ncsi_cmd_pkt *cmd;
+ struct ncsi_package *np;
+ struct ncsi_channel *nc;
+ unsigned long flags;
+
+ /* If the request already had associated response,
+ * let the response handler to release it.
+ */
+ spin_lock_irqsave(&ndp->lock, flags);
+ nr->enabled = false;
+ if (nr->rsp || !nr->cmd) {
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
+ if (nr->cmd) {
+ /* Find the package */
+ cmd = (struct ncsi_cmd_pkt *)
+ skb_network_header(nr->cmd);
+ ncsi_find_package_and_channel(ndp,
+ cmd->cmd.common.channel,
+ &np, &nc);
+ ncsi_send_netlink_timeout(nr, np, nc);
+ }
+ }
+
+ /* Release the request */
+ ncsi_free_request(nr);
+}
+
+static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
+{
+ struct ncsi_dev *nd = &ndp->ndev;
+ struct ncsi_package *np;
+ struct ncsi_channel *nc, *tmp;
+ struct ncsi_cmd_arg nca;
+ unsigned long flags;
+ int ret;
+
+ np = ndp->active_package;
+ nc = ndp->active_channel;
+ nca.ndp = ndp;
+ nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
+ switch (nd->state) {
+ case ncsi_dev_state_suspend:
+ nd->state = ncsi_dev_state_suspend_select;
+ /* Fall through */
+ case ncsi_dev_state_suspend_select:
+ ndp->pending_req_num = 1;
+
+ nca.type = NCSI_PKT_CMD_SP;
+ nca.package = np->id;
+ nca.channel = NCSI_RESERVED_CHANNEL;
+ if (ndp->flags & NCSI_DEV_HWA)
+ nca.bytes[0] = 0;
+ else
+ nca.bytes[0] = 1;
+
+ /* To retrieve the last link states of channels in current
+ * package when current active channel needs fail over to
+ * another one. It means we will possibly select another
+ * channel as next active one. The link states of channels
+ * are most important factor of the selection. So we need
+ * accurate link states. Unfortunately, the link states on
+ * inactive channels can't be updated with LSC AEN in time.
+ */
+ if (ndp->flags & NCSI_DEV_RESHUFFLE)
+ nd->state = ncsi_dev_state_suspend_gls;
+ else
+ nd->state = ncsi_dev_state_suspend_dcnt;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+
+ break;
+ case ncsi_dev_state_suspend_gls:
+ ndp->pending_req_num = np->channel_num;
+
+ nca.type = NCSI_PKT_CMD_GLS;
+ nca.package = np->id;
+
+ nd->state = ncsi_dev_state_suspend_dcnt;
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ nca.channel = nc->id;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+ }
+
+ break;
+ case ncsi_dev_state_suspend_dcnt:
+ ndp->pending_req_num = 1;
+
+ nca.type = NCSI_PKT_CMD_DCNT;
+ nca.package = np->id;
+ nca.channel = nc->id;
+
+ nd->state = ncsi_dev_state_suspend_dc;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+
+ break;
+ case ncsi_dev_state_suspend_dc:
+ ndp->pending_req_num = 1;
+
+ nca.type = NCSI_PKT_CMD_DC;
+ nca.package = np->id;
+ nca.channel = nc->id;
+ nca.bytes[0] = 1;
+
+ nd->state = ncsi_dev_state_suspend_deselect;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+
+ NCSI_FOR_EACH_CHANNEL(np, tmp) {
+ /* If there is another channel active on this package
+ * do not deselect the package.
+ */
+ if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) {
+ nd->state = ncsi_dev_state_suspend_done;
+ break;
+ }
+ }
+ break;
+ case ncsi_dev_state_suspend_deselect:
+ ndp->pending_req_num = 1;
+
+ nca.type = NCSI_PKT_CMD_DP;
+ nca.package = np->id;
+ nca.channel = NCSI_RESERVED_CHANNEL;
+
+ nd->state = ncsi_dev_state_suspend_done;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+
+ break;
+ case ncsi_dev_state_suspend_done:
+ spin_lock_irqsave(&nc->lock, flags);
+ nc->state = NCSI_CHANNEL_INACTIVE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+ if (ndp->flags & NCSI_DEV_RESET)
+ ncsi_reset_dev(nd);
+ else
+ ncsi_process_next_channel(ndp);
+ break;
+ default:
+ netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n",
+ nd->state);
+ }
+
+ return;
+error:
+ nd->state = ncsi_dev_state_functional;
+}
+
+/* Check the VLAN filter bitmap for a set filter, and construct a
+ * "Set VLAN Filter - Disable" packet if found.
+ */
+static int clear_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
+ struct ncsi_cmd_arg *nca)
+{
+ struct ncsi_channel_vlan_filter *ncf;
+ unsigned long flags;
+ void *bitmap;
+ int index;
+ u16 vid;
+
+ ncf = &nc->vlan_filter;
+ bitmap = &ncf->bitmap;
+
+ spin_lock_irqsave(&nc->lock, flags);
+ index = find_next_bit(bitmap, ncf->n_vids, 0);
+ if (index >= ncf->n_vids) {
+ spin_unlock_irqrestore(&nc->lock, flags);
+ return -1;
+ }
+ vid = ncf->vids[index];
+
+ clear_bit(index, bitmap);
+ ncf->vids[index] = 0;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ nca->type = NCSI_PKT_CMD_SVF;
+ nca->words[1] = vid;
+ /* HW filter index starts at 1 */
+ nca->bytes[6] = index + 1;
+ nca->bytes[7] = 0x00;
+ return 0;
+}
+
+/* Find an outstanding VLAN tag and constuct a "Set VLAN Filter - Enable"
+ * packet.
+ */
+static int set_one_vid(struct ncsi_dev_priv *ndp, struct ncsi_channel *nc,
+ struct ncsi_cmd_arg *nca)
+{
+ struct ncsi_channel_vlan_filter *ncf;
+ struct vlan_vid *vlan = NULL;
+ unsigned long flags;
+ int i, index;
+ void *bitmap;
+ u16 vid;
+
+ if (list_empty(&ndp->vlan_vids))
+ return -1;
+
+ ncf = &nc->vlan_filter;
+ bitmap = &ncf->bitmap;
+
+ spin_lock_irqsave(&nc->lock, flags);
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
+ vid = vlan->vid;
+ for (i = 0; i < ncf->n_vids; i++)
+ if (ncf->vids[i] == vid) {
+ vid = 0;
+ break;
+ }
+ if (vid)
+ break;
+ }
+ rcu_read_unlock();
+
+ if (!vid) {
+ /* No VLAN ID is not set */
+ spin_unlock_irqrestore(&nc->lock, flags);
+ return -1;
+ }
+
+ index = find_next_zero_bit(bitmap, ncf->n_vids, 0);
+ if (index < 0 || index >= ncf->n_vids) {
+ netdev_err(ndp->ndev.dev,
+ "Channel %u already has all VLAN filters set\n",
+ nc->id);
+ spin_unlock_irqrestore(&nc->lock, flags);
+ return -1;
+ }
+
+ ncf->vids[index] = vid;
+ set_bit(index, bitmap);
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ nca->type = NCSI_PKT_CMD_SVF;
+ nca->words[1] = vid;
+ /* HW filter index starts at 1 */
+ nca->bytes[6] = index + 1;
+ nca->bytes[7] = 0x01;
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
+
+/* NCSI OEM Command APIs */
+static int ncsi_oem_gma_handler_bcm(struct ncsi_cmd_arg *nca)
+{
+ unsigned char data[NCSI_OEM_BCM_CMD_GMA_LEN];
+ int ret = 0;
+
+ nca->payload = NCSI_OEM_BCM_CMD_GMA_LEN;
+
+ memset(data, 0, NCSI_OEM_BCM_CMD_GMA_LEN);
+ *(unsigned int *)data = ntohl(NCSI_OEM_MFR_BCM_ID);
+ data[5] = NCSI_OEM_BCM_CMD_GMA;
+
+ nca->data = data;
+
+ ret = ncsi_xmit_cmd(nca);
+ if (ret)
+ netdev_err(nca->ndp->ndev.dev,
+ "NCSI: Failed to transmit cmd 0x%x during configure\n",
+ nca->type);
+ return ret;
+}
+
+static int ncsi_oem_gma_handler_mlx(struct ncsi_cmd_arg *nca)
+{
+ union {
+ u8 data_u8[NCSI_OEM_MLX_CMD_GMA_LEN];
+ u32 data_u32[NCSI_OEM_MLX_CMD_GMA_LEN / sizeof(u32)];
+ } u;
+ int ret = 0;
+
+ nca->payload = NCSI_OEM_MLX_CMD_GMA_LEN;
+
+ memset(&u, 0, sizeof(u));
+ u.data_u32[0] = ntohl(NCSI_OEM_MFR_MLX_ID);
+ u.data_u8[5] = NCSI_OEM_MLX_CMD_GMA;
+ u.data_u8[6] = NCSI_OEM_MLX_CMD_GMA_PARAM;
+
+ nca->data = u.data_u8;
+
+ ret = ncsi_xmit_cmd(nca);
+ if (ret)
+ netdev_err(nca->ndp->ndev.dev,
+ "NCSI: Failed to transmit cmd 0x%x during configure\n",
+ nca->type);
+ return ret;
+}
+
+/* OEM Command handlers initialization */
+static struct ncsi_oem_gma_handler {
+ unsigned int mfr_id;
+ int (*handler)(struct ncsi_cmd_arg *nca);
+} ncsi_oem_gma_handlers[] = {
+ { NCSI_OEM_MFR_BCM_ID, ncsi_oem_gma_handler_bcm },
+ { NCSI_OEM_MFR_MLX_ID, ncsi_oem_gma_handler_mlx }
+};
+
+static int ncsi_gma_handler(struct ncsi_cmd_arg *nca, unsigned int mf_id)
+{
+ struct ncsi_oem_gma_handler *nch = NULL;
+ int i;
+
+ /* This function should only be called once, return if flag set */
+ if (nca->ndp->gma_flag == 1)
+ return -1;
+
+ /* Find gma handler for given manufacturer id */
+ for (i = 0; i < ARRAY_SIZE(ncsi_oem_gma_handlers); i++) {
+ if (ncsi_oem_gma_handlers[i].mfr_id == mf_id) {
+ if (ncsi_oem_gma_handlers[i].handler)
+ nch = &ncsi_oem_gma_handlers[i];
+ break;
+ }
+ }
+
+ if (!nch) {
+ netdev_err(nca->ndp->ndev.dev,
+ "NCSI: No GMA handler available for MFR-ID (0x%x)\n",
+ mf_id);
+ return -1;
+ }
+
+ /* Get Mac address from NCSI device */
+ return nch->handler(nca);
+}
+
+#endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
+
+/* Determine if a given channel from the channel_queue should be used for Tx */
+static bool ncsi_channel_is_tx(struct ncsi_dev_priv *ndp,
+ struct ncsi_channel *nc)
+{
+ struct ncsi_channel_mode *ncm;
+ struct ncsi_channel *channel;
+ struct ncsi_package *np;
+
+ /* Check if any other channel has Tx enabled; a channel may have already
+ * been configured and removed from the channel queue.
+ */
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ if (!ndp->multi_package && np != nc->package)
+ continue;
+ NCSI_FOR_EACH_CHANNEL(np, channel) {
+ ncm = &channel->modes[NCSI_MODE_TX_ENABLE];
+ if (ncm->enable)
+ return false;
+ }
+ }
+
+ /* This channel is the preferred channel and has link */
+ list_for_each_entry_rcu(channel, &ndp->channel_queue, link) {
+ np = channel->package;
+ if (np->preferred_channel &&
+ ncsi_channel_has_link(np->preferred_channel)) {
+ return np->preferred_channel == nc;
+ }
+ }
+
+ /* This channel has link */
+ if (ncsi_channel_has_link(nc))
+ return true;
+
+ list_for_each_entry_rcu(channel, &ndp->channel_queue, link)
+ if (ncsi_channel_has_link(channel))
+ return false;
+
+ /* No other channel has link; default to this one */
+ return true;
+}
+
+/* Change the active Tx channel in a multi-channel setup */
+int ncsi_update_tx_channel(struct ncsi_dev_priv *ndp,
+ struct ncsi_package *package,
+ struct ncsi_channel *disable,
+ struct ncsi_channel *enable)
+{
+ struct ncsi_cmd_arg nca;
+ struct ncsi_channel *nc;
+ struct ncsi_package *np;
+ int ret = 0;
+
+ if (!package->multi_channel && !ndp->multi_package)
+ netdev_warn(ndp->ndev.dev,
+ "NCSI: Trying to update Tx channel in single-channel mode\n");
+ nca.ndp = ndp;
+ nca.req_flags = 0;
+
+ /* Find current channel with Tx enabled */
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ if (disable)
+ break;
+ if (!ndp->multi_package && np != package)
+ continue;
+
+ NCSI_FOR_EACH_CHANNEL(np, nc)
+ if (nc->modes[NCSI_MODE_TX_ENABLE].enable) {
+ disable = nc;
+ break;
+ }
+ }
+
+ /* Find a suitable channel for Tx */
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ if (enable)
+ break;
+ if (!ndp->multi_package && np != package)
+ continue;
+ if (!(ndp->package_whitelist & (0x1 << np->id)))
+ continue;
+
+ if (np->preferred_channel &&
+ ncsi_channel_has_link(np->preferred_channel)) {
+ enable = np->preferred_channel;
+ break;
+ }
+
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ if (!(np->channel_whitelist & 0x1 << nc->id))
+ continue;
+ if (nc->state != NCSI_CHANNEL_ACTIVE)
+ continue;
+ if (ncsi_channel_has_link(nc)) {
+ enable = nc;
+ break;
+ }
+ }
+ }
+
+ if (disable == enable)
+ return -1;
+
+ if (!enable)
+ return -1;
+
+ if (disable) {
+ nca.channel = disable->id;
+ nca.package = disable->package->id;
+ nca.type = NCSI_PKT_CMD_DCNT;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ netdev_err(ndp->ndev.dev,
+ "Error %d sending DCNT\n",
+ ret);
+ }
+
+ netdev_info(ndp->ndev.dev, "NCSI: channel %u enables Tx\n", enable->id);
+
+ nca.channel = enable->id;
+ nca.package = enable->package->id;
+ nca.type = NCSI_PKT_CMD_ECNT;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ netdev_err(ndp->ndev.dev,
+ "Error %d sending ECNT\n",
+ ret);
+
+ return ret;
+}
+
+static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
+{
+ struct ncsi_package *np = ndp->active_package;
+ struct ncsi_channel *nc = ndp->active_channel;
+ struct ncsi_channel *hot_nc = NULL;
+ struct ncsi_dev *nd = &ndp->ndev;
+ struct net_device *dev = nd->dev;
+ struct ncsi_cmd_arg nca;
+ unsigned char index;
+ unsigned long flags;
+ int ret;
+
+ nca.ndp = ndp;
+ nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
+ switch (nd->state) {
+ case ncsi_dev_state_config:
+ case ncsi_dev_state_config_sp:
+ ndp->pending_req_num = 1;
+
+ /* Select the specific package */
+ nca.type = NCSI_PKT_CMD_SP;
+ if (ndp->flags & NCSI_DEV_HWA)
+ nca.bytes[0] = 0;
+ else
+ nca.bytes[0] = 1;
+ nca.package = np->id;
+ nca.channel = NCSI_RESERVED_CHANNEL;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret) {
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Failed to transmit CMD_SP\n");
+ goto error;
+ }
+
+ nd->state = ncsi_dev_state_config_cis;
+ break;
+ case ncsi_dev_state_config_cis:
+ ndp->pending_req_num = 1;
+
+ /* Clear initial state */
+ nca.type = NCSI_PKT_CMD_CIS;
+ nca.package = np->id;
+ nca.channel = nc->id;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret) {
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Failed to transmit CMD_CIS\n");
+ goto error;
+ }
+
+ nd->state = ncsi_dev_state_config_oem_gma;
+ break;
+ case ncsi_dev_state_config_oem_gma:
+ nd->state = ncsi_dev_state_config_clear_vids;
+ ret = -1;
+
+#if IS_ENABLED(CONFIG_NCSI_OEM_CMD_GET_MAC)
+ nca.type = NCSI_PKT_CMD_OEM;
+ nca.package = np->id;
+ nca.channel = nc->id;
+ ndp->pending_req_num = 1;
+ ret = ncsi_gma_handler(&nca, nc->version.mf_id);
+#endif /* CONFIG_NCSI_OEM_CMD_GET_MAC */
+
+ if (ret < 0)
+ schedule_work(&ndp->work);
+
+ break;
+ case ncsi_dev_state_config_clear_vids:
+ case ncsi_dev_state_config_svf:
+ case ncsi_dev_state_config_ev:
+ case ncsi_dev_state_config_sma:
+ case ncsi_dev_state_config_ebf:
+ case ncsi_dev_state_config_dgmf:
+ case ncsi_dev_state_config_ecnt:
+ case ncsi_dev_state_config_ec:
+ case ncsi_dev_state_config_ae:
+ case ncsi_dev_state_config_gls:
+ ndp->pending_req_num = 1;
+
+ nca.package = np->id;
+ nca.channel = nc->id;
+
+ /* Clear any active filters on the channel before setting */
+ if (nd->state == ncsi_dev_state_config_clear_vids) {
+ ret = clear_one_vid(ndp, nc, &nca);
+ if (ret) {
+ nd->state = ncsi_dev_state_config_svf;
+ schedule_work(&ndp->work);
+ break;
+ }
+ /* Repeat */
+ nd->state = ncsi_dev_state_config_clear_vids;
+ /* Add known VLAN tags to the filter */
+ } else if (nd->state == ncsi_dev_state_config_svf) {
+ ret = set_one_vid(ndp, nc, &nca);
+ if (ret) {
+ nd->state = ncsi_dev_state_config_ev;
+ schedule_work(&ndp->work);
+ break;
+ }
+ /* Repeat */
+ nd->state = ncsi_dev_state_config_svf;
+ /* Enable/Disable the VLAN filter */
+ } else if (nd->state == ncsi_dev_state_config_ev) {
+ if (list_empty(&ndp->vlan_vids)) {
+ nca.type = NCSI_PKT_CMD_DV;
+ } else {
+ nca.type = NCSI_PKT_CMD_EV;
+ nca.bytes[3] = NCSI_CAP_VLAN_NO;
+ }
+ nd->state = ncsi_dev_state_config_sma;
+ } else if (nd->state == ncsi_dev_state_config_sma) {
+ /* Use first entry in unicast filter table. Note that
+ * the MAC filter table starts from entry 1 instead of
+ * 0.
+ */
+ nca.type = NCSI_PKT_CMD_SMA;
+ for (index = 0; index < 6; index++)
+ nca.bytes[index] = dev->dev_addr[index];
+ nca.bytes[6] = 0x1;
+ nca.bytes[7] = 0x1;
+ nd->state = ncsi_dev_state_config_ebf;
+ } else if (nd->state == ncsi_dev_state_config_ebf) {
+ nca.type = NCSI_PKT_CMD_EBF;
+ nca.dwords[0] = nc->caps[NCSI_CAP_BC].cap;
+ /* if multicast global filtering is supported then
+ * disable it so that all multicast packet will be
+ * forwarded to management controller
+ */
+ if (nc->caps[NCSI_CAP_GENERIC].cap &
+ NCSI_CAP_GENERIC_MC)
+ nd->state = ncsi_dev_state_config_dgmf;
+ else if (ncsi_channel_is_tx(ndp, nc))
+ nd->state = ncsi_dev_state_config_ecnt;
+ else
+ nd->state = ncsi_dev_state_config_ec;
+ } else if (nd->state == ncsi_dev_state_config_dgmf) {
+ nca.type = NCSI_PKT_CMD_DGMF;
+ if (ncsi_channel_is_tx(ndp, nc))
+ nd->state = ncsi_dev_state_config_ecnt;
+ else
+ nd->state = ncsi_dev_state_config_ec;
+ } else if (nd->state == ncsi_dev_state_config_ecnt) {
+ if (np->preferred_channel &&
+ nc != np->preferred_channel)
+ netdev_info(ndp->ndev.dev,
+ "NCSI: Tx failed over to channel %u\n",
+ nc->id);
+ nca.type = NCSI_PKT_CMD_ECNT;
+ nd->state = ncsi_dev_state_config_ec;
+ } else if (nd->state == ncsi_dev_state_config_ec) {
+ /* Enable AEN if it's supported */
+ nca.type = NCSI_PKT_CMD_EC;
+ nd->state = ncsi_dev_state_config_ae;
+ if (!(nc->caps[NCSI_CAP_AEN].cap & NCSI_CAP_AEN_MASK))
+ nd->state = ncsi_dev_state_config_gls;
+ } else if (nd->state == ncsi_dev_state_config_ae) {
+ nca.type = NCSI_PKT_CMD_AE;
+ nca.bytes[0] = 0;
+ nca.dwords[1] = nc->caps[NCSI_CAP_AEN].cap;
+ nd->state = ncsi_dev_state_config_gls;
+ } else if (nd->state == ncsi_dev_state_config_gls) {
+ nca.type = NCSI_PKT_CMD_GLS;
+ nd->state = ncsi_dev_state_config_done;
+ }
+
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret) {
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Failed to transmit CMD %x\n",
+ nca.type);
+ goto error;
+ }
+ break;
+ case ncsi_dev_state_config_done:
+ netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
+ nc->id);
+ spin_lock_irqsave(&nc->lock, flags);
+ nc->state = NCSI_CHANNEL_ACTIVE;
+
+ if (ndp->flags & NCSI_DEV_RESET) {
+ /* A reset event happened during config, start it now */
+ nc->reconfigure_needed = false;
+ spin_unlock_irqrestore(&nc->lock, flags);
+ ncsi_reset_dev(nd);
+ break;
+ }
+
+ if (nc->reconfigure_needed) {
+ /* This channel's configuration has been updated
+ * part-way during the config state - start the
+ * channel configuration over
+ */
+ nc->reconfigure_needed = false;
+ nc->state = NCSI_CHANNEL_INACTIVE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ list_add_tail_rcu(&nc->link, &ndp->channel_queue);
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ netdev_dbg(dev, "Dirty NCSI channel state reset\n");
+ ncsi_process_next_channel(ndp);
+ break;
+ }
+
+ if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
+ hot_nc = nc;
+ } else {
+ hot_nc = NULL;
+ netdev_dbg(ndp->ndev.dev,
+ "NCSI: channel %u link down after config\n",
+ nc->id);
+ }
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ /* Update the hot channel */
+ spin_lock_irqsave(&ndp->lock, flags);
+ ndp->hot_channel = hot_nc;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ ncsi_start_channel_monitor(nc);
+ ncsi_process_next_channel(ndp);
+ break;
+ default:
+ netdev_alert(dev, "Wrong NCSI state 0x%x in config\n",
+ nd->state);
+ }
+
+ return;
+
+error:
+ ncsi_report_link(ndp, true);
+}
+
+static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
+{
+ struct ncsi_channel *nc, *found, *hot_nc;
+ struct ncsi_channel_mode *ncm;
+ unsigned long flags, cflags;
+ struct ncsi_package *np;
+ bool with_link;
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ hot_nc = ndp->hot_channel;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ /* By default the search is done once an inactive channel with up
+ * link is found, unless a preferred channel is set.
+ * If multi_package or multi_channel are configured all channels in the
+ * whitelist are added to the channel queue.
+ */
+ found = NULL;
+ with_link = false;
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ if (!(ndp->package_whitelist & (0x1 << np->id)))
+ continue;
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ if (!(np->channel_whitelist & (0x1 << nc->id)))
+ continue;
+
+ spin_lock_irqsave(&nc->lock, cflags);
+
+ if (!list_empty(&nc->link) ||
+ nc->state != NCSI_CHANNEL_INACTIVE) {
+ spin_unlock_irqrestore(&nc->lock, cflags);
+ continue;
+ }
+
+ if (!found)
+ found = nc;
+
+ if (nc == hot_nc)
+ found = nc;
+
+ ncm = &nc->modes[NCSI_MODE_LINK];
+ if (ncm->data[2] & 0x1) {
+ found = nc;
+ with_link = true;
+ }
+
+ /* If multi_channel is enabled configure all valid
+ * channels whether or not they currently have link
+ * so they will have AENs enabled.
+ */
+ if (with_link || np->multi_channel) {
+ spin_lock_irqsave(&ndp->lock, flags);
+ list_add_tail_rcu(&nc->link,
+ &ndp->channel_queue);
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ netdev_dbg(ndp->ndev.dev,
+ "NCSI: Channel %u added to queue (link %s)\n",
+ nc->id,
+ ncm->data[2] & 0x1 ? "up" : "down");
+ }
+
+ spin_unlock_irqrestore(&nc->lock, cflags);
+
+ if (with_link && !np->multi_channel)
+ break;
+ }
+ if (with_link && !ndp->multi_package)
+ break;
+ }
+
+ if (list_empty(&ndp->channel_queue) && found) {
+ netdev_info(ndp->ndev.dev,
+ "NCSI: No channel with link found, configuring channel %u\n",
+ found->id);
+ spin_lock_irqsave(&ndp->lock, flags);
+ list_add_tail_rcu(&found->link, &ndp->channel_queue);
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ } else if (!found) {
+ netdev_warn(ndp->ndev.dev,
+ "NCSI: No channel found to configure!\n");
+ ncsi_report_link(ndp, true);
+ return -ENODEV;
+ }
+
+ return ncsi_process_next_channel(ndp);
+}
+
+static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp)
+{
+ struct ncsi_package *np;
+ struct ncsi_channel *nc;
+ unsigned int cap;
+ bool has_channel = false;
+
+ /* The hardware arbitration is disabled if any one channel
+ * doesn't support explicitly.
+ */
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ has_channel = true;
+
+ cap = nc->caps[NCSI_CAP_GENERIC].cap;
+ if (!(cap & NCSI_CAP_GENERIC_HWA) ||
+ (cap & NCSI_CAP_GENERIC_HWA_MASK) !=
+ NCSI_CAP_GENERIC_HWA_SUPPORT) {
+ ndp->flags &= ~NCSI_DEV_HWA;
+ return false;
+ }
+ }
+ }
+
+ if (has_channel) {
+ ndp->flags |= NCSI_DEV_HWA;
+ return true;
+ }
+
+ ndp->flags &= ~NCSI_DEV_HWA;
+ return false;
+}
+
+static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
+{
+ struct ncsi_dev *nd = &ndp->ndev;
+ struct ncsi_package *np;
+ struct ncsi_channel *nc;
+ struct ncsi_cmd_arg nca;
+ unsigned char index;
+ int ret;
+
+ nca.ndp = ndp;
+ nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
+ switch (nd->state) {
+ case ncsi_dev_state_probe:
+ nd->state = ncsi_dev_state_probe_deselect;
+ /* Fall through */
+ case ncsi_dev_state_probe_deselect:
+ ndp->pending_req_num = 8;
+
+ /* Deselect all possible packages */
+ nca.type = NCSI_PKT_CMD_DP;
+ nca.channel = NCSI_RESERVED_CHANNEL;
+ for (index = 0; index < 8; index++) {
+ nca.package = index;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+ }
+
+ nd->state = ncsi_dev_state_probe_package;
+ break;
+ case ncsi_dev_state_probe_package:
+ ndp->pending_req_num = 1;
+
+ nca.type = NCSI_PKT_CMD_SP;
+ nca.bytes[0] = 1;
+ nca.package = ndp->package_probe_id;
+ nca.channel = NCSI_RESERVED_CHANNEL;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+ nd->state = ncsi_dev_state_probe_channel;
+ break;
+ case ncsi_dev_state_probe_channel:
+ ndp->active_package = ncsi_find_package(ndp,
+ ndp->package_probe_id);
+ if (!ndp->active_package) {
+ /* No response */
+ nd->state = ncsi_dev_state_probe_dp;
+ schedule_work(&ndp->work);
+ break;
+ }
+ nd->state = ncsi_dev_state_probe_cis;
+ schedule_work(&ndp->work);
+ break;
+ case ncsi_dev_state_probe_cis:
+ ndp->pending_req_num = NCSI_RESERVED_CHANNEL;
+
+ /* Clear initial state */
+ nca.type = NCSI_PKT_CMD_CIS;
+ nca.package = ndp->active_package->id;
+ for (index = 0; index < NCSI_RESERVED_CHANNEL; index++) {
+ nca.channel = index;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+ }
+
+ nd->state = ncsi_dev_state_probe_gvi;
+ break;
+ case ncsi_dev_state_probe_gvi:
+ case ncsi_dev_state_probe_gc:
+ case ncsi_dev_state_probe_gls:
+ np = ndp->active_package;
+ ndp->pending_req_num = np->channel_num;
+
+ /* Retrieve version, capability or link status */
+ if (nd->state == ncsi_dev_state_probe_gvi)
+ nca.type = NCSI_PKT_CMD_GVI;
+ else if (nd->state == ncsi_dev_state_probe_gc)
+ nca.type = NCSI_PKT_CMD_GC;
+ else
+ nca.type = NCSI_PKT_CMD_GLS;
+
+ nca.package = np->id;
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ nca.channel = nc->id;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+ }
+
+ if (nd->state == ncsi_dev_state_probe_gvi)
+ nd->state = ncsi_dev_state_probe_gc;
+ else if (nd->state == ncsi_dev_state_probe_gc)
+ nd->state = ncsi_dev_state_probe_gls;
+ else
+ nd->state = ncsi_dev_state_probe_dp;
+ break;
+ case ncsi_dev_state_probe_dp:
+ ndp->pending_req_num = 1;
+
+ /* Deselect the current package */
+ nca.type = NCSI_PKT_CMD_DP;
+ nca.package = ndp->package_probe_id;
+ nca.channel = NCSI_RESERVED_CHANNEL;
+ ret = ncsi_xmit_cmd(&nca);
+ if (ret)
+ goto error;
+
+ /* Probe next package */
+ ndp->package_probe_id++;
+ if (ndp->package_probe_id >= 8) {
+ /* Probe finished */
+ ndp->flags |= NCSI_DEV_PROBED;
+ break;
+ }
+ nd->state = ncsi_dev_state_probe_package;
+ ndp->active_package = NULL;
+ break;
+ default:
+ netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n",
+ nd->state);
+ }
+
+ if (ndp->flags & NCSI_DEV_PROBED) {
+ /* Check if all packages have HWA support */
+ ncsi_check_hwa(ndp);
+ ncsi_choose_active_channel(ndp);
+ }
+
+ return;
+error:
+ netdev_err(ndp->ndev.dev,
+ "NCSI: Failed to transmit cmd 0x%x during probe\n",
+ nca.type);
+ ncsi_report_link(ndp, true);
+}
+
+static void ncsi_dev_work(struct work_struct *work)
+{
+ struct ncsi_dev_priv *ndp = container_of(work,
+ struct ncsi_dev_priv, work);
+ struct ncsi_dev *nd = &ndp->ndev;
+
+ switch (nd->state & ncsi_dev_state_major) {
+ case ncsi_dev_state_probe:
+ ncsi_probe_channel(ndp);
+ break;
+ case ncsi_dev_state_suspend:
+ ncsi_suspend_channel(ndp);
+ break;
+ case ncsi_dev_state_config:
+ ncsi_configure_channel(ndp);
+ break;
+ default:
+ netdev_warn(nd->dev, "Wrong NCSI state 0x%x in workqueue\n",
+ nd->state);
+ }
+}
+
+int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
+{
+ struct ncsi_channel *nc;
+ int old_state;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ nc = list_first_or_null_rcu(&ndp->channel_queue,
+ struct ncsi_channel, link);
+ if (!nc) {
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ goto out;
+ }
+
+ list_del_init(&nc->link);
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ spin_lock_irqsave(&nc->lock, flags);
+ old_state = nc->state;
+ nc->state = NCSI_CHANNEL_INVISIBLE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ ndp->active_channel = nc;
+ ndp->active_package = nc->package;
+
+ switch (old_state) {
+ case NCSI_CHANNEL_INACTIVE:
+ ndp->ndev.state = ncsi_dev_state_config;
+ netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
+ nc->id);
+ ncsi_configure_channel(ndp);
+ break;
+ case NCSI_CHANNEL_ACTIVE:
+ ndp->ndev.state = ncsi_dev_state_suspend;
+ netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
+ nc->id);
+ ncsi_suspend_channel(ndp);
+ break;
+ default:
+ netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
+ old_state, nc->package->id, nc->id);
+ ncsi_report_link(ndp, false);
+ return -EINVAL;
+ }
+
+ return 0;
+
+out:
+ ndp->active_channel = NULL;
+ ndp->active_package = NULL;
+ if (ndp->flags & NCSI_DEV_RESHUFFLE) {
+ ndp->flags &= ~NCSI_DEV_RESHUFFLE;
+ return ncsi_choose_active_channel(ndp);
+ }
+
+ ncsi_report_link(ndp, false);
+ return -ENODEV;
+}
+
+static int ncsi_kick_channels(struct ncsi_dev_priv *ndp)
+{
+ struct ncsi_dev *nd = &ndp->ndev;
+ struct ncsi_channel *nc;
+ struct ncsi_package *np;
+ unsigned long flags;
+ unsigned int n = 0;
+
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ spin_lock_irqsave(&nc->lock, flags);
+
+ /* Channels may be busy, mark dirty instead of
+ * kicking if;
+ * a) not ACTIVE (configured)
+ * b) in the channel_queue (to be configured)
+ * c) it's ndev is in the config state
+ */
+ if (nc->state != NCSI_CHANNEL_ACTIVE) {
+ if ((ndp->ndev.state & 0xff00) ==
+ ncsi_dev_state_config ||
+ !list_empty(&nc->link)) {
+ netdev_dbg(nd->dev,
+ "NCSI: channel %p marked dirty\n",
+ nc);
+ nc->reconfigure_needed = true;
+ }
+ spin_unlock_irqrestore(&nc->lock, flags);
+ continue;
+ }
+
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ ncsi_stop_channel_monitor(nc);
+ spin_lock_irqsave(&nc->lock, flags);
+ nc->state = NCSI_CHANNEL_INACTIVE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ list_add_tail_rcu(&nc->link, &ndp->channel_queue);
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ netdev_dbg(nd->dev, "NCSI: kicked channel %p\n", nc);
+ n++;
+ }
+ }
+
+ return n;
+}
+
+int ncsi_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
+{
+ struct ncsi_dev_priv *ndp;
+ unsigned int n_vids = 0;
+ struct vlan_vid *vlan;
+ struct ncsi_dev *nd;
+ bool found = false;
+
+ if (vid == 0)
+ return 0;
+
+ nd = ncsi_find_dev(dev);
+ if (!nd) {
+ netdev_warn(dev, "NCSI: No net_device?\n");
+ return 0;
+ }
+
+ ndp = TO_NCSI_DEV_PRIV(nd);
+
+ /* Add the VLAN id to our internal list */
+ list_for_each_entry_rcu(vlan, &ndp->vlan_vids, list) {
+ n_vids++;
+ if (vlan->vid == vid) {
+ netdev_dbg(dev, "NCSI: vid %u already registered\n",
+ vid);
+ return 0;
+ }
+ }
+ if (n_vids >= NCSI_MAX_VLAN_VIDS) {
+ netdev_warn(dev,
+ "tried to add vlan id %u but NCSI max already registered (%u)\n",
+ vid, NCSI_MAX_VLAN_VIDS);
+ return -ENOSPC;
+ }
+
+ vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
+ if (!vlan)
+ return -ENOMEM;
+
+ vlan->proto = proto;
+ vlan->vid = vid;
+ list_add_rcu(&vlan->list, &ndp->vlan_vids);
+
+ netdev_dbg(dev, "NCSI: Added new vid %u\n", vid);
+
+ found = ncsi_kick_channels(ndp) != 0;
+
+ return found ? ncsi_process_next_channel(ndp) : 0;
+}
+EXPORT_SYMBOL_GPL(ncsi_vlan_rx_add_vid);
+
+int ncsi_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
+{
+ struct vlan_vid *vlan, *tmp;
+ struct ncsi_dev_priv *ndp;
+ struct ncsi_dev *nd;
+ bool found = false;
+
+ if (vid == 0)
+ return 0;
+
+ nd = ncsi_find_dev(dev);
+ if (!nd) {
+ netdev_warn(dev, "NCSI: no net_device?\n");
+ return 0;
+ }
+
+ ndp = TO_NCSI_DEV_PRIV(nd);
+
+ /* Remove the VLAN id from our internal list */
+ list_for_each_entry_safe(vlan, tmp, &ndp->vlan_vids, list)
+ if (vlan->vid == vid) {
+ netdev_dbg(dev, "NCSI: vid %u found, removing\n", vid);
+ list_del_rcu(&vlan->list);
+ found = true;
+ kfree(vlan);
+ }
+
+ if (!found) {
+ netdev_err(dev, "NCSI: vid %u wasn't registered!\n", vid);
+ return -EINVAL;
+ }
+
+ found = ncsi_kick_channels(ndp) != 0;
+
+ return found ? ncsi_process_next_channel(ndp) : 0;
+}
+EXPORT_SYMBOL_GPL(ncsi_vlan_rx_kill_vid);
+
+struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
+ void (*handler)(struct ncsi_dev *ndev))
+{
+ struct ncsi_dev_priv *ndp;
+ struct ncsi_dev *nd;
+ unsigned long flags;
+ int i;
+
+ /* Check if the device has been registered or not */
+ nd = ncsi_find_dev(dev);
+ if (nd)
+ return nd;
+
+ /* Create NCSI device */
+ ndp = kzalloc(sizeof(*ndp), GFP_ATOMIC);
+ if (!ndp)
+ return NULL;
+
+ nd = &ndp->ndev;
+ nd->state = ncsi_dev_state_registered;
+ nd->dev = dev;
+ nd->handler = handler;
+ ndp->pending_req_num = 0;
+ INIT_LIST_HEAD(&ndp->channel_queue);
+ INIT_LIST_HEAD(&ndp->vlan_vids);
+ INIT_WORK(&ndp->work, ncsi_dev_work);
+ ndp->package_whitelist = UINT_MAX;
+
+ /* Initialize private NCSI device */
+ spin_lock_init(&ndp->lock);
+ INIT_LIST_HEAD(&ndp->packages);
+ ndp->request_id = NCSI_REQ_START_IDX;
+ for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) {
+ ndp->requests[i].id = i;
+ ndp->requests[i].ndp = ndp;
+ timer_setup(&ndp->requests[i].timer, ncsi_request_timeout, 0);
+ }
+
+ spin_lock_irqsave(&ncsi_dev_lock, flags);
+ list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
+ spin_unlock_irqrestore(&ncsi_dev_lock, flags);
+
+ /* Register NCSI packet Rx handler */
+ ndp->ptype.type = cpu_to_be16(ETH_P_NCSI);
+ ndp->ptype.func = ncsi_rcv_rsp;
+ ndp->ptype.dev = dev;
+ dev_add_pack(&ndp->ptype);
+
+ return nd;
+}
+EXPORT_SYMBOL_GPL(ncsi_register_dev);
+
+int ncsi_start_dev(struct ncsi_dev *nd)
+{
+ struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
+
+ if (nd->state != ncsi_dev_state_registered &&
+ nd->state != ncsi_dev_state_functional)
+ return -ENOTTY;
+
+ if (!(ndp->flags & NCSI_DEV_PROBED)) {
+ ndp->package_probe_id = 0;
+ nd->state = ncsi_dev_state_probe;
+ schedule_work(&ndp->work);
+ return 0;
+ }
+
+ return ncsi_reset_dev(nd);
+}
+EXPORT_SYMBOL_GPL(ncsi_start_dev);
+
+void ncsi_stop_dev(struct ncsi_dev *nd)
+{
+ struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
+ struct ncsi_package *np;
+ struct ncsi_channel *nc;
+ bool chained;
+ int old_state;
+ unsigned long flags;
+
+ /* Stop the channel monitor on any active channels. Don't reset the
+ * channel state so we know which were active when ncsi_start_dev()
+ * is next called.
+ */
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ ncsi_stop_channel_monitor(nc);
+
+ spin_lock_irqsave(&nc->lock, flags);
+ chained = !list_empty(&nc->link);
+ old_state = nc->state;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ WARN_ON_ONCE(chained ||
+ old_state == NCSI_CHANNEL_INVISIBLE);
+ }
+ }
+
+ netdev_dbg(ndp->ndev.dev, "NCSI: Stopping device\n");
+ ncsi_report_link(ndp, true);
+}
+EXPORT_SYMBOL_GPL(ncsi_stop_dev);
+
+int ncsi_reset_dev(struct ncsi_dev *nd)
+{
+ struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
+ struct ncsi_channel *nc, *active, *tmp;
+ struct ncsi_package *np;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ndp->lock, flags);
+
+ if (!(ndp->flags & NCSI_DEV_RESET)) {
+ /* Haven't been called yet, check states */
+ switch (nd->state & ncsi_dev_state_major) {
+ case ncsi_dev_state_registered:
+ case ncsi_dev_state_probe:
+ /* Not even probed yet - do nothing */
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return 0;
+ case ncsi_dev_state_suspend:
+ case ncsi_dev_state_config:
+ /* Wait for the channel to finish its suspend/config
+ * operation; once it finishes it will check for
+ * NCSI_DEV_RESET and reset the state.
+ */
+ ndp->flags |= NCSI_DEV_RESET;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return 0;
+ }
+ } else {
+ switch (nd->state) {
+ case ncsi_dev_state_suspend_done:
+ case ncsi_dev_state_config_done:
+ case ncsi_dev_state_functional:
+ /* Ok */
+ break;
+ default:
+ /* Current reset operation happening */
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return 0;
+ }
+ }
+
+ if (!list_empty(&ndp->channel_queue)) {
+ /* Clear any channel queue we may have interrupted */
+ list_for_each_entry_safe(nc, tmp, &ndp->channel_queue, link)
+ list_del_init(&nc->link);
+ }
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ active = NULL;
+ NCSI_FOR_EACH_PACKAGE(ndp, np) {
+ NCSI_FOR_EACH_CHANNEL(np, nc) {
+ spin_lock_irqsave(&nc->lock, flags);
+
+ if (nc->state == NCSI_CHANNEL_ACTIVE) {
+ active = nc;
+ nc->state = NCSI_CHANNEL_INVISIBLE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+ ncsi_stop_channel_monitor(nc);
+ break;
+ }
+
+ spin_unlock_irqrestore(&nc->lock, flags);
+ }
+ if (active)
+ break;
+ }
+
+ if (!active) {
+ /* Done */
+ spin_lock_irqsave(&ndp->lock, flags);
+ ndp->flags &= ~NCSI_DEV_RESET;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+ return ncsi_choose_active_channel(ndp);
+ }
+
+ spin_lock_irqsave(&ndp->lock, flags);
+ ndp->flags |= NCSI_DEV_RESET;
+ ndp->active_channel = active;
+ ndp->active_package = active->package;
+ spin_unlock_irqrestore(&ndp->lock, flags);
+
+ nd->state = ncsi_dev_state_suspend;
+ schedule_work(&ndp->work);
+ return 0;
+}
+
+void ncsi_unregister_dev(struct ncsi_dev *nd)
+{
+ struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
+ struct ncsi_package *np, *tmp;
+ unsigned long flags;
+
+ dev_remove_pack(&ndp->ptype);
+
+ list_for_each_entry_safe(np, tmp, &ndp->packages, node)
+ ncsi_remove_package(np);
+
+ spin_lock_irqsave(&ncsi_dev_lock, flags);
+ list_del_rcu(&ndp->node);
+ spin_unlock_irqrestore(&ncsi_dev_lock, flags);
+
+ kfree(ndp);
+}
+EXPORT_SYMBOL_GPL(ncsi_unregister_dev);