diff options
Diffstat (limited to 'net/ncsi')
| -rw-r--r-- | net/ncsi/Kconfig | 12 | ||||
| -rw-r--r-- | net/ncsi/Makefile | 4 | ||||
| -rw-r--r-- | net/ncsi/internal.h | 328 | ||||
| -rw-r--r-- | net/ncsi/ncsi-aen.c | 193 | ||||
| -rw-r--r-- | net/ncsi/ncsi-cmd.c | 367 | ||||
| -rw-r--r-- | net/ncsi/ncsi-manage.c | 1205 | ||||
| -rw-r--r-- | net/ncsi/ncsi-pkt.h | 415 | ||||
| -rw-r--r-- | net/ncsi/ncsi-rsp.c | 1035 |
8 files changed, 3559 insertions, 0 deletions
diff --git a/net/ncsi/Kconfig b/net/ncsi/Kconfig new file mode 100644 index 000000000..08a8a6031 --- /dev/null +++ b/net/ncsi/Kconfig @@ -0,0 +1,12 @@ +# +# Configuration for NCSI support +# + +config NET_NCSI + bool "NCSI interface support" + depends on INET + ---help--- + This module provides NCSI (Network Controller Sideband Interface) + support. Enable this only if your system connects to a network + device via NCSI and the ethernet driver you're using supports + the protocol explicitly. diff --git a/net/ncsi/Makefile b/net/ncsi/Makefile new file mode 100644 index 000000000..dd12b564f --- /dev/null +++ b/net/ncsi/Makefile @@ -0,0 +1,4 @@ +# +# Makefile for NCSI API +# +obj-$(CONFIG_NET_NCSI) += ncsi-cmd.o ncsi-rsp.o ncsi-aen.o ncsi-manage.o diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h new file mode 100644 index 000000000..33738c060 --- /dev/null +++ b/net/ncsi/internal.h @@ -0,0 +1,328 @@ +/* + * Copyright Gavin Shan, IBM Corporation 2016. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __NCSI_INTERNAL_H__ +#define __NCSI_INTERNAL_H__ + +enum { + NCSI_CAP_BASE = 0, + NCSI_CAP_GENERIC = 0, + NCSI_CAP_BC, + NCSI_CAP_MC, + NCSI_CAP_BUFFER, + NCSI_CAP_AEN, + NCSI_CAP_VLAN, + NCSI_CAP_MAX +}; + +enum { + NCSI_CAP_GENERIC_HWA = 0x01, /* HW arbitration */ + NCSI_CAP_GENERIC_HDS = 0x02, /* HNC driver status change */ + NCSI_CAP_GENERIC_FC = 0x04, /* HNC to MC flow control */ + NCSI_CAP_GENERIC_FC1 = 0x08, /* MC to HNC flow control */ + NCSI_CAP_GENERIC_MC = 0x10, /* Global MC filtering */ + NCSI_CAP_GENERIC_HWA_UNKNOWN = 0x00, /* Unknown HW arbitration */ + NCSI_CAP_GENERIC_HWA_SUPPORT = 0x20, /* Supported HW arbitration */ + NCSI_CAP_GENERIC_HWA_NOT_SUPPORT = 0x40, /* No HW arbitration */ + NCSI_CAP_GENERIC_HWA_RESERVED = 0x60, /* Reserved HW arbitration */ + NCSI_CAP_GENERIC_HWA_MASK = 0x60, /* Mask for HW arbitration */ + NCSI_CAP_GENERIC_MASK = 0x7f, + NCSI_CAP_BC_ARP = 0x01, /* ARP packet filtering */ + NCSI_CAP_BC_DHCPC = 0x02, /* DHCP client filtering */ + NCSI_CAP_BC_DHCPS = 0x04, /* DHCP server filtering */ + NCSI_CAP_BC_NETBIOS = 0x08, /* NetBIOS packet filtering */ + NCSI_CAP_BC_MASK = 0x0f, + NCSI_CAP_MC_IPV6_NEIGHBOR = 0x01, /* IPv6 neighbor filtering */ + NCSI_CAP_MC_IPV6_ROUTER = 0x02, /* IPv6 router filering */ + NCSI_CAP_MC_DHCPV6_RELAY = 0x04, /* DHCPv6 relay / server MC */ + NCSI_CAP_MC_DHCPV6_WELL_KNOWN = 0x08, /* DHCPv6 well-known MC */ + NCSI_CAP_MC_IPV6_MLD = 0x10, /* IPv6 MLD filtering */ + NCSI_CAP_MC_IPV6_NEIGHBOR_S = 0x20, /* IPv6 neighbour filtering */ + NCSI_CAP_MC_MASK = 0x3f, + NCSI_CAP_AEN_LSC = 0x01, /* Link status change */ + NCSI_CAP_AEN_CR = 0x02, /* Configuration required */ + NCSI_CAP_AEN_HDS = 0x04, /* HNC driver status */ + NCSI_CAP_AEN_MASK = 0x07, + NCSI_CAP_VLAN_ONLY = 0x01, /* Filter VLAN packet only */ + NCSI_CAP_VLAN_NO = 0x02, /* Filter VLAN and non-VLAN */ + NCSI_CAP_VLAN_ANY = 0x04, /* Filter Any-and-non-VLAN */ + NCSI_CAP_VLAN_MASK = 0x07 +}; + +enum { + NCSI_MODE_BASE = 0, + NCSI_MODE_ENABLE = 0, + NCSI_MODE_TX_ENABLE, + NCSI_MODE_LINK, + NCSI_MODE_VLAN, + NCSI_MODE_BC, + NCSI_MODE_MC, + NCSI_MODE_AEN, + NCSI_MODE_FC, + NCSI_MODE_MAX +}; + +enum { + NCSI_FILTER_BASE = 0, + NCSI_FILTER_VLAN = 0, + NCSI_FILTER_UC, + NCSI_FILTER_MC, + NCSI_FILTER_MIXED, + NCSI_FILTER_MAX +}; + +struct ncsi_channel_version { + u32 version; /* Supported BCD encoded NCSI version */ + u32 alpha2; /* Supported BCD encoded NCSI version */ + u8 fw_name[12]; /* Firware name string */ + u32 fw_version; /* Firmware version */ + u16 pci_ids[4]; /* PCI identification */ + u32 mf_id; /* Manufacture ID */ +}; + +struct ncsi_channel_cap { + u32 index; /* Index of channel capabilities */ + u32 cap; /* NCSI channel capability */ +}; + +struct ncsi_channel_mode { + u32 index; /* Index of channel modes */ + u32 enable; /* Enabled or disabled */ + u32 size; /* Valid entries in ncm_data[] */ + u32 data[8]; /* Data entries */ +}; + +struct ncsi_channel_filter { + u32 index; /* Index of channel filters */ + u32 total; /* Total entries in the filter table */ + u64 bitmap; /* Bitmap of valid entries */ + u32 data[]; /* Data for the valid entries */ +}; + +struct ncsi_channel_stats { + u32 hnc_cnt_hi; /* Counter cleared */ + u32 hnc_cnt_lo; /* Counter cleared */ + u32 hnc_rx_bytes; /* Rx bytes */ + u32 hnc_tx_bytes; /* Tx bytes */ + u32 hnc_rx_uc_pkts; /* Rx UC packets */ + u32 hnc_rx_mc_pkts; /* Rx MC packets */ + u32 hnc_rx_bc_pkts; /* Rx BC packets */ + u32 hnc_tx_uc_pkts; /* Tx UC packets */ + u32 hnc_tx_mc_pkts; /* Tx MC packets */ + u32 hnc_tx_bc_pkts; /* Tx BC packets */ + u32 hnc_fcs_err; /* FCS errors */ + u32 hnc_align_err; /* Alignment errors */ + u32 hnc_false_carrier; /* False carrier detection */ + u32 hnc_runt_pkts; /* Rx runt packets */ + u32 hnc_jabber_pkts; /* Rx jabber packets */ + u32 hnc_rx_pause_xon; /* Rx pause XON frames */ + u32 hnc_rx_pause_xoff; /* Rx XOFF frames */ + u32 hnc_tx_pause_xon; /* Tx XON frames */ + u32 hnc_tx_pause_xoff; /* Tx XOFF frames */ + u32 hnc_tx_s_collision; /* Single collision frames */ + u32 hnc_tx_m_collision; /* Multiple collision frames */ + u32 hnc_l_collision; /* Late collision frames */ + u32 hnc_e_collision; /* Excessive collision frames */ + u32 hnc_rx_ctl_frames; /* Rx control frames */ + u32 hnc_rx_64_frames; /* Rx 64-bytes frames */ + u32 hnc_rx_127_frames; /* Rx 65-127 bytes frames */ + u32 hnc_rx_255_frames; /* Rx 128-255 bytes frames */ + u32 hnc_rx_511_frames; /* Rx 256-511 bytes frames */ + u32 hnc_rx_1023_frames; /* Rx 512-1023 bytes frames */ + u32 hnc_rx_1522_frames; /* Rx 1024-1522 bytes frames */ + u32 hnc_rx_9022_frames; /* Rx 1523-9022 bytes frames */ + u32 hnc_tx_64_frames; /* Tx 64-bytes frames */ + u32 hnc_tx_127_frames; /* Tx 65-127 bytes frames */ + u32 hnc_tx_255_frames; /* Tx 128-255 bytes frames */ + u32 hnc_tx_511_frames; /* Tx 256-511 bytes frames */ + u32 hnc_tx_1023_frames; /* Tx 512-1023 bytes frames */ + u32 hnc_tx_1522_frames; /* Tx 1024-1522 bytes frames */ + u32 hnc_tx_9022_frames; /* Tx 1523-9022 bytes frames */ + u32 hnc_rx_valid_bytes; /* Rx valid bytes */ + u32 hnc_rx_runt_pkts; /* Rx error runt packets */ + u32 hnc_rx_jabber_pkts; /* Rx error jabber packets */ + u32 ncsi_rx_cmds; /* Rx NCSI commands */ + u32 ncsi_dropped_cmds; /* Dropped commands */ + u32 ncsi_cmd_type_errs; /* Command type errors */ + u32 ncsi_cmd_csum_errs; /* Command checksum errors */ + u32 ncsi_rx_pkts; /* Rx NCSI packets */ + u32 ncsi_tx_pkts; /* Tx NCSI packets */ + u32 ncsi_tx_aen_pkts; /* Tx AEN packets */ + u32 pt_tx_pkts; /* Tx packets */ + u32 pt_tx_dropped; /* Tx dropped packets */ + u32 pt_tx_channel_err; /* Tx channel errors */ + u32 pt_tx_us_err; /* Tx undersize errors */ + u32 pt_rx_pkts; /* Rx packets */ + u32 pt_rx_dropped; /* Rx dropped packets */ + u32 pt_rx_channel_err; /* Rx channel errors */ + u32 pt_rx_us_err; /* Rx undersize errors */ + u32 pt_rx_os_err; /* Rx oversize errors */ +}; + +struct ncsi_dev_priv; +struct ncsi_package; + +#define NCSI_PACKAGE_SHIFT 5 +#define NCSI_PACKAGE_INDEX(c) (((c) >> NCSI_PACKAGE_SHIFT) & 0x7) +#define NCSI_CHANNEL_INDEX(c) ((c) & ((1 << NCSI_PACKAGE_SHIFT) - 1)) +#define NCSI_TO_CHANNEL(p, c) (((p) << NCSI_PACKAGE_SHIFT) | (c)) + +struct ncsi_channel { + unsigned char id; + int state; +#define NCSI_CHANNEL_INACTIVE 1 +#define NCSI_CHANNEL_ACTIVE 2 +#define NCSI_CHANNEL_INVISIBLE 3 + spinlock_t lock; /* Protect filters etc */ + struct ncsi_package *package; + struct ncsi_channel_version version; + struct ncsi_channel_cap caps[NCSI_CAP_MAX]; + struct ncsi_channel_mode modes[NCSI_MODE_MAX]; + struct ncsi_channel_filter *filters[NCSI_FILTER_MAX]; + struct ncsi_channel_stats stats; + struct timer_list timer; /* Link monitor timer */ + bool enabled; /* Timer is enabled */ + unsigned int timeout; /* Times of timeout */ + struct list_head node; + struct list_head link; +}; + +struct ncsi_package { + unsigned char id; /* NCSI 3-bits package ID */ + unsigned char uuid[16]; /* UUID */ + struct ncsi_dev_priv *ndp; /* NCSI device */ + spinlock_t lock; /* Protect the package */ + unsigned int channel_num; /* Number of channels */ + struct list_head channels; /* List of chanels */ + struct list_head node; /* Form list of packages */ +}; + +struct ncsi_request { + unsigned char id; /* Request ID - 0 to 255 */ + bool used; /* Request that has been assigned */ + bool driven; /* Drive state machine */ + struct ncsi_dev_priv *ndp; /* Associated NCSI device */ + struct sk_buff *cmd; /* Associated NCSI command packet */ + struct sk_buff *rsp; /* Associated NCSI response packet */ + struct timer_list timer; /* Timer on waiting for response */ + bool enabled; /* Time has been enabled or not */ +}; + +enum { + ncsi_dev_state_major = 0xff00, + ncsi_dev_state_minor = 0x00ff, + ncsi_dev_state_probe_deselect = 0x0201, + ncsi_dev_state_probe_package, + ncsi_dev_state_probe_channel, + ncsi_dev_state_probe_cis, + ncsi_dev_state_probe_gvi, + ncsi_dev_state_probe_gc, + ncsi_dev_state_probe_gls, + ncsi_dev_state_probe_dp, + ncsi_dev_state_config_sp = 0x0301, + ncsi_dev_state_config_cis, + ncsi_dev_state_config_sma, + ncsi_dev_state_config_ebf, +#if IS_ENABLED(CONFIG_IPV6) + ncsi_dev_state_config_egmf, +#endif + ncsi_dev_state_config_ecnt, + ncsi_dev_state_config_ec, + ncsi_dev_state_config_ae, + ncsi_dev_state_config_gls, + ncsi_dev_state_config_done, + ncsi_dev_state_suspend_select = 0x0401, + ncsi_dev_state_suspend_dcnt, + ncsi_dev_state_suspend_dc, + ncsi_dev_state_suspend_deselect, + ncsi_dev_state_suspend_done +}; + +struct ncsi_dev_priv { + struct ncsi_dev ndev; /* Associated NCSI device */ + unsigned int flags; /* NCSI device flags */ +#define NCSI_DEV_PROBED 1 /* Finalized NCSI topology */ +#define NCSI_DEV_HWA 2 /* Enabled HW arbitration */ +#define NCSI_DEV_RESHUFFLE 4 + spinlock_t lock; /* Protect the NCSI device */ +#if IS_ENABLED(CONFIG_IPV6) + unsigned int inet6_addr_num; /* Number of IPv6 addresses */ +#endif + unsigned int package_num; /* Number of packages */ + struct list_head packages; /* List of packages */ + struct ncsi_request requests[256]; /* Request table */ + unsigned int request_id; /* Last used request ID */ + unsigned int pending_req_num; /* Number of pending requests */ + struct ncsi_package *active_package; /* Currently handled package */ + struct ncsi_channel *active_channel; /* Currently handled channel */ + struct list_head channel_queue; /* Config queue of channels */ + struct work_struct work; /* For channel management */ + struct packet_type ptype; /* NCSI packet Rx handler */ + struct list_head node; /* Form NCSI device list */ +}; + +struct ncsi_cmd_arg { + struct ncsi_dev_priv *ndp; /* Associated NCSI device */ + unsigned char type; /* Command in the NCSI packet */ + unsigned char id; /* Request ID (sequence number) */ + unsigned char package; /* Destination package ID */ + unsigned char channel; /* Detination channel ID or 0x1f */ + unsigned short payload; /* Command packet payload length */ + bool driven; /* Drive the state machine? */ + union { + unsigned char bytes[16]; /* Command packet specific data */ + unsigned short words[8]; + unsigned int dwords[4]; + }; +}; + +extern struct list_head ncsi_dev_list; +extern spinlock_t ncsi_dev_lock; + +#define TO_NCSI_DEV_PRIV(nd) \ + container_of(nd, struct ncsi_dev_priv, ndev) +#define NCSI_FOR_EACH_DEV(ndp) \ + list_for_each_entry_rcu(ndp, &ncsi_dev_list, node) +#define NCSI_FOR_EACH_PACKAGE(ndp, np) \ + list_for_each_entry_rcu(np, &ndp->packages, node) +#define NCSI_FOR_EACH_CHANNEL(np, nc) \ + list_for_each_entry_rcu(nc, &np->channels, node) + +/* Resources */ +int ncsi_find_filter(struct ncsi_channel *nc, int table, void *data); +int ncsi_add_filter(struct ncsi_channel *nc, int table, void *data); +int ncsi_remove_filter(struct ncsi_channel *nc, int table, int index); +void ncsi_start_channel_monitor(struct ncsi_channel *nc); +void ncsi_stop_channel_monitor(struct ncsi_channel *nc); +struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np, + unsigned char id); +struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np, + unsigned char id); +struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp, + unsigned char id); +struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp, + unsigned char id); +void ncsi_remove_package(struct ncsi_package *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_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp, bool driven); +void ncsi_free_request(struct ncsi_request *nr); +struct ncsi_dev *ncsi_find_dev(struct net_device *dev); +int ncsi_process_next_channel(struct ncsi_dev_priv *ndp); + +/* Packet handlers */ +u32 ncsi_calculate_checksum(unsigned char *data, int len); +int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca); +int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt, struct net_device *orig_dev); +int ncsi_aen_handler(struct ncsi_dev_priv *ndp, struct sk_buff *skb); + +#endif /* __NCSI_INTERNAL_H__ */ diff --git a/net/ncsi/ncsi-aen.c b/net/ncsi/ncsi-aen.c new file mode 100644 index 000000000..d46346844 --- /dev/null +++ b/net/ncsi/ncsi-aen.c @@ -0,0 +1,193 @@ +/* + * Copyright Gavin Shan, IBM Corporation 2016. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#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 "internal.h" +#include "ncsi-pkt.h" + +static int ncsi_validate_aen_pkt(struct ncsi_aen_pkt_hdr *h, + const unsigned short payload) +{ + u32 checksum; + __be32 *pchecksum; + + if (h->common.revision != NCSI_PKT_REVISION) + return -EINVAL; + if (ntohs(h->common.length) != payload) + return -EINVAL; + + /* Validate checksum, which might be zeroes if the + * sender doesn't support checksum according to NCSI + * specification. + */ + pchecksum = (__be32 *)((void *)(h + 1) + payload - 4); + if (ntohl(*pchecksum) == 0) + return 0; + + checksum = ncsi_calculate_checksum((unsigned char *)h, + sizeof(*h) + payload - 4); + if (*pchecksum != htonl(checksum)) + return -EINVAL; + + return 0; +} + +static int ncsi_aen_handler_lsc(struct ncsi_dev_priv *ndp, + struct ncsi_aen_pkt_hdr *h) +{ + struct ncsi_aen_lsc_pkt *lsc; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + unsigned long old_data; + unsigned long flags; + + /* Find the NCSI channel */ + ncsi_find_package_and_channel(ndp, h->common.channel, NULL, &nc); + if (!nc) + return -ENODEV; + + /* Update the link status */ + ncm = &nc->modes[NCSI_MODE_LINK]; + lsc = (struct ncsi_aen_lsc_pkt *)h; + old_data = ncm->data[2]; + ncm->data[2] = ntohl(lsc->status); + ncm->data[4] = ntohl(lsc->oem_status); + if (!((old_data ^ ncm->data[2]) & 0x1) || + !list_empty(&nc->link)) + return 0; + if (!(nc->state == NCSI_CHANNEL_INACTIVE && (ncm->data[2] & 0x1)) && + !(nc->state == NCSI_CHANNEL_ACTIVE && !(ncm->data[2] & 0x1))) + return 0; + + if (!(ndp->flags & NCSI_DEV_HWA) && + nc->state == NCSI_CHANNEL_ACTIVE) + ndp->flags |= NCSI_DEV_RESHUFFLE; + + ncsi_stop_channel_monitor(nc); + spin_lock_irqsave(&ndp->lock, flags); + list_add_tail_rcu(&nc->link, &ndp->channel_queue); + spin_unlock_irqrestore(&ndp->lock, flags); + + return ncsi_process_next_channel(ndp); +} + +static int ncsi_aen_handler_cr(struct ncsi_dev_priv *ndp, + struct ncsi_aen_pkt_hdr *h) +{ + struct ncsi_channel *nc; + unsigned long flags; + + /* Find the NCSI channel */ + ncsi_find_package_and_channel(ndp, h->common.channel, NULL, &nc); + if (!nc) + return -ENODEV; + + if (!list_empty(&nc->link) || + nc->state != NCSI_CHANNEL_ACTIVE) + return 0; + + ncsi_stop_channel_monitor(nc); + spin_lock_irqsave(&ndp->lock, flags); + xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + list_add_tail_rcu(&nc->link, &ndp->channel_queue); + spin_unlock_irqrestore(&ndp->lock, flags); + + return ncsi_process_next_channel(ndp); +} + +static int ncsi_aen_handler_hncdsc(struct ncsi_dev_priv *ndp, + struct ncsi_aen_pkt_hdr *h) +{ + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + struct ncsi_aen_hncdsc_pkt *hncdsc; + unsigned long flags; + + /* Find the NCSI channel */ + ncsi_find_package_and_channel(ndp, h->common.channel, NULL, &nc); + if (!nc) + return -ENODEV; + + /* If the channel is active one, we need reconfigure it */ + ncm = &nc->modes[NCSI_MODE_LINK]; + hncdsc = (struct ncsi_aen_hncdsc_pkt *)h; + ncm->data[3] = ntohl(hncdsc->status); + if (!list_empty(&nc->link) || + nc->state != NCSI_CHANNEL_ACTIVE || + (ncm->data[3] & 0x1)) + return 0; + + if (ndp->flags & NCSI_DEV_HWA) + ndp->flags |= NCSI_DEV_RESHUFFLE; + + /* If this channel is the active one and the link doesn't + * work, we have to choose another channel to be active one. + * The logic here is exactly similar to what we do when link + * is down on the active channel. + */ + ncsi_stop_channel_monitor(nc); + spin_lock_irqsave(&ndp->lock, flags); + list_add_tail_rcu(&nc->link, &ndp->channel_queue); + spin_unlock_irqrestore(&ndp->lock, flags); + + ncsi_process_next_channel(ndp); + + return 0; +} + +static struct ncsi_aen_handler { + unsigned char type; + int payload; + int (*handler)(struct ncsi_dev_priv *ndp, + struct ncsi_aen_pkt_hdr *h); +} ncsi_aen_handlers[] = { + { NCSI_PKT_AEN_LSC, 12, ncsi_aen_handler_lsc }, + { NCSI_PKT_AEN_CR, 4, ncsi_aen_handler_cr }, + { NCSI_PKT_AEN_HNCDSC, 4, ncsi_aen_handler_hncdsc } +}; + +int ncsi_aen_handler(struct ncsi_dev_priv *ndp, struct sk_buff *skb) +{ + struct ncsi_aen_pkt_hdr *h; + struct ncsi_aen_handler *nah = NULL; + int i, ret; + + /* Find the handler */ + h = (struct ncsi_aen_pkt_hdr *)skb_network_header(skb); + for (i = 0; i < ARRAY_SIZE(ncsi_aen_handlers); i++) { + if (ncsi_aen_handlers[i].type == h->type) { + nah = &ncsi_aen_handlers[i]; + break; + } + } + + if (!nah) { + netdev_warn(ndp->ndev.dev, "Invalid AEN (0x%x) received\n", + h->type); + return -ENOENT; + } + + ret = ncsi_validate_aen_pkt(h, nah->payload); + if (ret) + goto out; + + ret = nah->handler(ndp, h); +out: + consume_skb(skb); + return ret; +} diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c new file mode 100644 index 000000000..21057a8ce --- /dev/null +++ b/net/ncsi/ncsi-cmd.c @@ -0,0 +1,367 @@ +/* + * Copyright Gavin Shan, IBM Corporation 2016. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/etherdevice.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> + +#include <net/ncsi.h> +#include <net/net_namespace.h> +#include <net/sock.h> + +#include "internal.h" +#include "ncsi-pkt.h" + +u32 ncsi_calculate_checksum(unsigned char *data, int len) +{ + u32 checksum = 0; + int i; + + for (i = 0; i < len; i += 2) + checksum += (((u32)data[i] << 8) | data[i + 1]); + + checksum = (~checksum + 1); + return checksum; +} + +/* This function should be called after the data area has been + * populated completely. + */ +static void ncsi_cmd_build_header(struct ncsi_pkt_hdr *h, + struct ncsi_cmd_arg *nca) +{ + u32 checksum; + __be32 *pchecksum; + + h->mc_id = 0; + h->revision = NCSI_PKT_REVISION; + h->reserved = 0; + h->id = nca->id; + h->type = nca->type; + h->channel = NCSI_TO_CHANNEL(nca->package, + nca->channel); + h->length = htons(nca->payload); + h->reserved1[0] = 0; + h->reserved1[1] = 0; + + /* Fill with calculated checksum */ + checksum = ncsi_calculate_checksum((unsigned char *)h, + sizeof(*h) + nca->payload); + pchecksum = (__be32 *)((void *)h + sizeof(struct ncsi_pkt_hdr) + + nca->payload); + *pchecksum = htonl(checksum); +} + +static int ncsi_cmd_handler_default(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_pkt *cmd; + + cmd = (struct ncsi_cmd_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_sp(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_sp_pkt *cmd; + + cmd = (struct ncsi_cmd_sp_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->hw_arbitration = nca->bytes[0]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_dc(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_dc_pkt *cmd; + + cmd = (struct ncsi_cmd_dc_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->ald = nca->bytes[0]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_rc(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_rc_pkt *cmd; + + cmd = (struct ncsi_cmd_rc_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_ae(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_ae_pkt *cmd; + + cmd = (struct ncsi_cmd_ae_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->mc_id = nca->bytes[0]; + cmd->mode = htonl(nca->dwords[1]); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_sl(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_sl_pkt *cmd; + + cmd = (struct ncsi_cmd_sl_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->mode = htonl(nca->dwords[0]); + cmd->oem_mode = htonl(nca->dwords[1]); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_svf(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_svf_pkt *cmd; + + cmd = (struct ncsi_cmd_svf_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->vlan = htons(nca->words[0]); + cmd->index = nca->bytes[2]; + cmd->enable = nca->bytes[3]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_ev(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_ev_pkt *cmd; + + cmd = (struct ncsi_cmd_ev_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->mode = nca->bytes[0]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_sma(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_sma_pkt *cmd; + int i; + + cmd = (struct ncsi_cmd_sma_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + for (i = 0; i < 6; i++) + cmd->mac[i] = nca->bytes[i]; + cmd->index = nca->bytes[6]; + cmd->at_e = nca->bytes[7]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_ebf(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_ebf_pkt *cmd; + + cmd = (struct ncsi_cmd_ebf_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->mode = htonl(nca->dwords[0]); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_egmf(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_egmf_pkt *cmd; + + cmd = (struct ncsi_cmd_egmf_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->mode = htonl(nca->dwords[0]); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_snfc(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_snfc_pkt *cmd; + + cmd = (struct ncsi_cmd_snfc_pkt *)skb_put(skb, sizeof(*cmd)); + memset(cmd, 0, sizeof(*cmd)); + cmd->mode = nca->bytes[0]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static struct ncsi_cmd_handler { + unsigned char type; + int payload; + int (*handler)(struct sk_buff *skb, + struct ncsi_cmd_arg *nca); +} ncsi_cmd_handlers[] = { + { NCSI_PKT_CMD_CIS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_SP, 4, ncsi_cmd_handler_sp }, + { NCSI_PKT_CMD_DP, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_EC, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_DC, 4, ncsi_cmd_handler_dc }, + { NCSI_PKT_CMD_RC, 4, ncsi_cmd_handler_rc }, + { NCSI_PKT_CMD_ECNT, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_DCNT, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_AE, 8, ncsi_cmd_handler_ae }, + { NCSI_PKT_CMD_SL, 8, ncsi_cmd_handler_sl }, + { NCSI_PKT_CMD_GLS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_SVF, 4, ncsi_cmd_handler_svf }, + { NCSI_PKT_CMD_EV, 4, ncsi_cmd_handler_ev }, + { NCSI_PKT_CMD_DV, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_SMA, 8, ncsi_cmd_handler_sma }, + { NCSI_PKT_CMD_EBF, 4, ncsi_cmd_handler_ebf }, + { NCSI_PKT_CMD_DBF, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_EGMF, 4, ncsi_cmd_handler_egmf }, + { NCSI_PKT_CMD_DGMF, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_SNFC, 4, ncsi_cmd_handler_snfc }, + { NCSI_PKT_CMD_GVI, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GC, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GP, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GCPS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GNS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GNPTS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GPS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_OEM, 0, NULL }, + { NCSI_PKT_CMD_PLDM, 0, NULL }, + { NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_handler_default } +}; + +static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca) +{ + struct ncsi_dev_priv *ndp = nca->ndp; + struct ncsi_dev *nd = &ndp->ndev; + struct net_device *dev = nd->dev; + int hlen = LL_RESERVED_SPACE(dev); + int tlen = dev->needed_tailroom; + int len = hlen + tlen; + struct sk_buff *skb; + struct ncsi_request *nr; + + nr = ncsi_alloc_request(ndp, nca->driven); + if (!nr) + return NULL; + + /* NCSI command packet has 16-bytes header, payload, 4 bytes checksum. + * The packet needs padding if its payload is less than 26 bytes to + * meet 64 bytes minimal ethernet frame length. + */ + len += sizeof(struct ncsi_cmd_pkt_hdr) + 4; + if (nca->payload < 26) + len += 26; + else + len += nca->payload; + + /* Allocate skb */ + skb = alloc_skb(len, GFP_ATOMIC); + if (!skb) { + ncsi_free_request(nr); + return NULL; + } + + nr->cmd = skb; + skb_reserve(skb, hlen); + skb_reset_network_header(skb); + + skb->dev = dev; + skb->protocol = htons(ETH_P_NCSI); + + return nr; +} + +int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca) +{ + struct ncsi_request *nr; + struct ethhdr *eh; + struct ncsi_cmd_handler *nch = NULL; + int i, ret; + + /* Search for the handler */ + for (i = 0; i < ARRAY_SIZE(ncsi_cmd_handlers); i++) { + if (ncsi_cmd_handlers[i].type == nca->type) { + if (ncsi_cmd_handlers[i].handler) + nch = &ncsi_cmd_handlers[i]; + else + nch = NULL; + + break; + } + } + + if (!nch) { + netdev_err(nca->ndp->ndev.dev, + "Cannot send packet with type 0x%02x\n", nca->type); + return -ENOENT; + } + + /* Get packet payload length and allocate the request */ + nca->payload = nch->payload; + nr = ncsi_alloc_command(nca); + if (!nr) + return -ENOMEM; + + /* Prepare the packet */ + nca->id = nr->id; + ret = nch->handler(nr->cmd, nca); + if (ret) { + ncsi_free_request(nr); + return ret; + } + + /* Fill the ethernet header */ + eh = (struct ethhdr *)skb_push(nr->cmd, sizeof(*eh)); + eh->h_proto = htons(ETH_P_NCSI); + eth_broadcast_addr(eh->h_dest); + eth_broadcast_addr(eh->h_source); + + /* Start the timer for the request that might not have + * corresponding response. Given NCSI is an internal + * connection a 1 second delay should be sufficient. + */ + nr->enabled = true; + mod_timer(&nr->timer, jiffies + 1 * HZ); + + /* Send NCSI packet */ + skb_get(nr->cmd); + ret = dev_queue_xmit(nr->cmd); + if (ret < 0) { + ncsi_free_request(nr); + return ret; + } + + return 0; +} diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c new file mode 100644 index 000000000..ef017b871 --- /dev/null +++ b/net/ncsi/ncsi-manage.c @@ -0,0 +1,1205 @@ +/* + * Copyright Gavin Shan, IBM Corporation 2016. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/netlink.h> + +#include <net/ncsi.h> +#include <net/net_namespace.h> +#include <net/sock.h> +#include <net/addrconf.h> +#include <net/ipv6.h> +#include <net/if_inet6.h> + +#include "internal.h" +#include "ncsi-pkt.h" + +LIST_HEAD(ncsi_dev_list); +DEFINE_SPINLOCK(ncsi_dev_lock); + +static inline int ncsi_filter_size(int table) +{ + int sizes[] = { 2, 6, 6, 6 }; + + BUILD_BUG_ON(ARRAY_SIZE(sizes) != NCSI_FILTER_MAX); + if (table < NCSI_FILTER_BASE || table >= NCSI_FILTER_MAX) + return -EINVAL; + + return sizes[table]; +} + +int ncsi_find_filter(struct ncsi_channel *nc, int table, void *data) +{ + struct ncsi_channel_filter *ncf; + void *bitmap; + int index, size; + unsigned long flags; + + ncf = nc->filters[table]; + if (!ncf) + return -ENXIO; + + size = ncsi_filter_size(table); + if (size < 0) + return size; + + spin_lock_irqsave(&nc->lock, flags); + bitmap = (void *)&ncf->bitmap; + index = -1; + while ((index = find_next_bit(bitmap, ncf->total, index + 1)) + < ncf->total) { + if (!memcmp(ncf->data + size * index, data, size)) { + spin_unlock_irqrestore(&nc->lock, flags); + return index; + } + } + spin_unlock_irqrestore(&nc->lock, flags); + + return -ENOENT; +} + +int ncsi_add_filter(struct ncsi_channel *nc, int table, void *data) +{ + struct ncsi_channel_filter *ncf; + int index, size; + void *bitmap; + unsigned long flags; + + size = ncsi_filter_size(table); + if (size < 0) + return size; + + index = ncsi_find_filter(nc, table, data); + if (index >= 0) + return index; + + ncf = nc->filters[table]; + if (!ncf) + return -ENODEV; + + spin_lock_irqsave(&nc->lock, flags); + bitmap = (void *)&ncf->bitmap; + do { + index = find_next_zero_bit(bitmap, ncf->total, 0); + if (index >= ncf->total) { + spin_unlock_irqrestore(&nc->lock, flags); + return -ENOSPC; + } + } while (test_and_set_bit(index, bitmap)); + + memcpy(ncf->data + size * index, data, size); + spin_unlock_irqrestore(&nc->lock, flags); + + return index; +} + +int ncsi_remove_filter(struct ncsi_channel *nc, int table, int index) +{ + struct ncsi_channel_filter *ncf; + int size; + void *bitmap; + unsigned long flags; + + size = ncsi_filter_size(table); + if (size < 0) + return size; + + ncf = nc->filters[table]; + if (!ncf || index >= ncf->total) + return -ENODEV; + + spin_lock_irqsave(&nc->lock, flags); + bitmap = (void *)&ncf->bitmap; + if (test_and_clear_bit(index, bitmap)) + memset(ncf->data + size * index, 0, size); + spin_unlock_irqrestore(&nc->lock, flags); + + return 0; +} + +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; + + 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) { + if (!list_empty(&nc->link) || + nc->state != NCSI_CHANNEL_ACTIVE) + continue; + + if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) { + nd->link_up = 1; + goto report; + } + } + } + +report: + nd->handler(nd); +} + +static void ncsi_channel_monitor(unsigned long data) +{ + struct ncsi_channel *nc = (struct ncsi_channel *)data; + struct ncsi_package *np = nc->package; + struct ncsi_dev_priv *ndp = np->ndp; + struct ncsi_cmd_arg nca; + bool enabled; + unsigned int timeout; + unsigned long flags; + int ret; + + spin_lock_irqsave(&nc->lock, flags); + timeout = nc->timeout; + enabled = nc->enabled; + spin_unlock_irqrestore(&nc->lock, flags); + + if (!enabled || !list_empty(&nc->link)) + return; + if (nc->state != NCSI_CHANNEL_INACTIVE && + nc->state != NCSI_CHANNEL_ACTIVE) + return; + + if (!(timeout % 2)) { + nca.ndp = ndp; + nca.package = np->id; + nca.channel = nc->id; + nca.type = NCSI_PKT_CMD_GLS; + nca.driven = false; + ret = ncsi_xmit_cmd(&nca); + if (ret) { + netdev_err(ndp->ndev.dev, "Error %d sending GLS\n", + ret); + return; + } + } + + if (timeout + 1 >= 3) { + if (!(ndp->flags & NCSI_DEV_HWA) && + nc->state == NCSI_CHANNEL_ACTIVE) + ncsi_report_link(ndp, true); + + spin_lock_irqsave(&ndp->lock, flags); + xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + 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->timeout = timeout + 1; + nc->enabled = true; + spin_unlock_irqrestore(&nc->lock, flags); + mod_timer(&nc->timer, jiffies + HZ * (1 << (nc->timeout / 2))); +} + +void ncsi_start_channel_monitor(struct ncsi_channel *nc) +{ + unsigned long flags; + + spin_lock_irqsave(&nc->lock, flags); + WARN_ON_ONCE(nc->enabled); + nc->timeout = 0; + nc->enabled = true; + spin_unlock_irqrestore(&nc->lock, flags); + + mod_timer(&nc->timer, jiffies + HZ * (1 << (nc->timeout / 2))); +} + +void ncsi_stop_channel_monitor(struct ncsi_channel *nc) +{ + unsigned long flags; + + spin_lock_irqsave(&nc->lock, flags); + if (!nc->enabled) { + spin_unlock_irqrestore(&nc->lock, flags); + return; + } + nc->enabled = false; + spin_unlock_irqrestore(&nc->lock, flags); + + del_timer_sync(&nc->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->enabled = false; + setup_timer(&nc->timer, ncsi_channel_monitor, (unsigned long)nc); + 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; + struct ncsi_channel_filter *ncf; + unsigned long flags; + int i; + + /* Release filters */ + spin_lock_irqsave(&nc->lock, flags); + for (i = 0; i < NCSI_FILTER_MAX; i++) { + ncf = nc->filters[i]; + if (!ncf) + continue; + + nc->filters[i] = NULL; + kfree(ncf); + } + + 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); + + 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, bool driven) +{ + 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; !nr && i < limit; i++) { + if (ndp->requests[i].used) + continue; + + nr = &ndp->requests[i]; + nr->used = true; + nr->driven = driven; + if (++ndp->request_id >= limit) + ndp->request_id = 0; + } + + /* Fail back to check from the starting cursor */ + for (i = 0; !nr && i < ndp->request_id; i++) { + if (ndp->requests[i].used) + continue; + + nr = &ndp->requests[i]; + nr->used = true; + nr->driven = driven; + if (++ndp->request_id >= limit) + ndp->request_id = 0; + } + 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->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(unsigned long data) +{ + struct ncsi_request *nr = (struct ncsi_request *)data; + struct ncsi_dev_priv *ndp = nr->ndp; + 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); + + /* 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 = ndp->active_package; + struct ncsi_channel *nc = ndp->active_channel; + struct ncsi_cmd_arg nca; + int ret; + + nca.ndp = ndp; + nca.driven = true; + switch (nd->state) { + case ncsi_dev_state_suspend: + nd->state = ncsi_dev_state_suspend_select; + /* Fall through */ + case ncsi_dev_state_suspend_select: + case ncsi_dev_state_suspend_dcnt: + case ncsi_dev_state_suspend_dc: + case ncsi_dev_state_suspend_deselect: + ndp->pending_req_num = 1; + + np = ndp->active_package; + nc = ndp->active_channel; + nca.package = np->id; + if (nd->state == ncsi_dev_state_suspend_select) { + nca.type = NCSI_PKT_CMD_SP; + nca.channel = 0x1f; + if (ndp->flags & NCSI_DEV_HWA) + nca.bytes[0] = 0; + else + nca.bytes[0] = 1; + nd->state = ncsi_dev_state_suspend_dcnt; + } else if (nd->state == ncsi_dev_state_suspend_dcnt) { + nca.type = NCSI_PKT_CMD_DCNT; + nca.channel = nc->id; + nd->state = ncsi_dev_state_suspend_dc; + } else if (nd->state == ncsi_dev_state_suspend_dc) { + nca.type = NCSI_PKT_CMD_DC; + nca.channel = nc->id; + nca.bytes[0] = 1; + nd->state = ncsi_dev_state_suspend_deselect; + } else if (nd->state == ncsi_dev_state_suspend_deselect) { + nca.type = NCSI_PKT_CMD_DP; + nca.channel = 0x1f; + nd->state = ncsi_dev_state_suspend_done; + } + + ret = ncsi_xmit_cmd(&nca); + if (ret) { + nd->state = ncsi_dev_state_functional; + return; + } + + break; + case ncsi_dev_state_suspend_done: + xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + ncsi_process_next_channel(ndp); + + break; + default: + netdev_warn(nd->dev, "Wrong NCSI state 0x%x in suspend\n", + nd->state); + } +} + +static void ncsi_configure_channel(struct ncsi_dev_priv *ndp) +{ + struct ncsi_dev *nd = &ndp->ndev; + struct net_device *dev = nd->dev; + struct ncsi_package *np = ndp->active_package; + struct ncsi_channel *nc = ndp->active_channel; + struct ncsi_cmd_arg nca; + unsigned char index; + int ret; + + nca.ndp = ndp; + nca.driven = true; + 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 = 0x1f; + ret = ncsi_xmit_cmd(&nca); + if (ret) + 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) + goto error; + + nd->state = ncsi_dev_state_config_sma; + break; + case ncsi_dev_state_config_sma: + case ncsi_dev_state_config_ebf: +#if IS_ENABLED(CONFIG_IPV6) + case ncsi_dev_state_config_egmf: +#endif + 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; + + /* Use first entry in unicast filter table. Note that + * the MAC filter table starts from entry 1 instead of + * 0. + */ + if (nd->state == ncsi_dev_state_config_sma) { + 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; + nd->state = ncsi_dev_state_config_ecnt; +#if IS_ENABLED(CONFIG_IPV6) + if (ndp->inet6_addr_num > 0 && + (nc->caps[NCSI_CAP_GENERIC].cap & + NCSI_CAP_GENERIC_MC)) + nd->state = ncsi_dev_state_config_egmf; + else + nd->state = ncsi_dev_state_config_ecnt; + } else if (nd->state == ncsi_dev_state_config_egmf) { + nca.type = NCSI_PKT_CMD_EGMF; + nca.dwords[0] = nc->caps[NCSI_CAP_MC].cap; + nd->state = ncsi_dev_state_config_ecnt; +#endif /* CONFIG_IPV6 */ + } else if (nd->state == ncsi_dev_state_config_ecnt) { + 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) + goto error; + break; + case ncsi_dev_state_config_done: + if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) + xchg(&nc->state, NCSI_CHANNEL_ACTIVE); + else + xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + + ncsi_start_channel_monitor(nc); + ncsi_process_next_channel(ndp); + break; + default: + netdev_warn(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_package *np; + struct ncsi_channel *nc, *found; + struct ncsi_channel_mode *ncm; + unsigned long flags; + + /* The search is done once an inactive channel with up + * link is found. + */ + found = NULL; + NCSI_FOR_EACH_PACKAGE(ndp, np) { + NCSI_FOR_EACH_CHANNEL(np, nc) { + if (!list_empty(&nc->link) || + nc->state != NCSI_CHANNEL_INACTIVE) + continue; + + if (!found) + found = nc; + + ncm = &nc->modes[NCSI_MODE_LINK]; + if (ncm->data[2] & 0x1) { + found = nc; + goto out; + } + } + } + + if (!found) { + ncsi_report_link(ndp, true); + return -ENODEV; + } + +out: + spin_lock_irqsave(&ndp->lock, flags); + list_add_tail_rcu(&found->link, &ndp->channel_queue); + spin_unlock_irqrestore(&ndp->lock, flags); + + 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; + + /* 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) { + 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; + } + } + } + + ndp->flags |= NCSI_DEV_HWA; + return true; +} + +static int ncsi_enable_hwa(struct ncsi_dev_priv *ndp) +{ + struct ncsi_package *np; + struct ncsi_channel *nc; + unsigned long flags; + + /* Move all available channels to processing queue */ + spin_lock_irqsave(&ndp->lock, flags); + NCSI_FOR_EACH_PACKAGE(ndp, np) { + NCSI_FOR_EACH_CHANNEL(np, nc) { + WARN_ON_ONCE(nc->state != NCSI_CHANNEL_INACTIVE || + !list_empty(&nc->link)); + ncsi_stop_channel_monitor(nc); + list_add_tail_rcu(&nc->link, &ndp->channel_queue); + } + } + spin_unlock_irqrestore(&ndp->lock, flags); + + /* We can have no channels in extremely case */ + if (list_empty(&ndp->channel_queue)) { + ncsi_report_link(ndp, false); + return -ENOENT; + } + + return ncsi_process_next_channel(ndp); +} + +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.driven = true; + 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 = 0x1f; + 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 = 16; + + /* Select all possible packages */ + nca.type = NCSI_PKT_CMD_SP; + nca.bytes[0] = 1; + nca.channel = 0x1f; + for (index = 0; index < 8; index++) { + nca.package = index; + ret = ncsi_xmit_cmd(&nca); + if (ret) + goto error; + } + + /* Disable all possible packages */ + nca.type = NCSI_PKT_CMD_DP; + for (index = 0; index < 8; index++) { + nca.package = index; + ret = ncsi_xmit_cmd(&nca); + if (ret) + goto error; + } + + nd->state = ncsi_dev_state_probe_channel; + break; + case ncsi_dev_state_probe_channel: + if (!ndp->active_package) + ndp->active_package = list_first_or_null_rcu( + &ndp->packages, struct ncsi_package, node); + else if (list_is_last(&ndp->active_package->node, + &ndp->packages)) + ndp->active_package = NULL; + else + ndp->active_package = list_next_entry( + ndp->active_package, node); + + /* All available packages and channels are enumerated. The + * enumeration happens for once when the NCSI interface is + * started. So we need continue to start the interface after + * the enumeration. + * + * We have to choose an active channel before configuring it. + * Note that we possibly don't have active channel in extreme + * situation. + */ + if (!ndp->active_package) { + ndp->flags |= NCSI_DEV_PROBED; + if (ncsi_check_hwa(ndp)) + ncsi_enable_hwa(ndp); + else + ncsi_choose_active_channel(ndp); + return; + } + + /* Select the active package */ + ndp->pending_req_num = 1; + nca.type = NCSI_PKT_CMD_SP; + nca.bytes[0] = 1; + nca.package = ndp->active_package->id; + nca.channel = 0x1f; + ret = ncsi_xmit_cmd(&nca); + if (ret) + goto error; + + nd->state = ncsi_dev_state_probe_cis; + break; + case ncsi_dev_state_probe_cis: + ndp->pending_req_num = 32; + + /* Clear initial state */ + nca.type = NCSI_PKT_CMD_CIS; + nca.package = ndp->active_package->id; + for (index = 0; index < 0x20; 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 active package */ + nca.type = NCSI_PKT_CMD_DP; + nca.package = ndp->active_package->id; + nca.channel = 0x1f; + ret = ncsi_xmit_cmd(&nca); + if (ret) + goto error; + + /* Scan channels in next package */ + nd->state = ncsi_dev_state_probe_channel; + break; + default: + netdev_warn(nd->dev, "Wrong NCSI state 0x%0x in enumeration\n", + nd->state); + } + + return; +error: + 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; + } + + old_state = xchg(&nc->state, NCSI_CHANNEL_INVISIBLE); + list_del_init(&nc->link); + + spin_unlock_irqrestore(&ndp->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; + ncsi_configure_channel(ndp); + break; + case NCSI_CHANNEL_ACTIVE: + ndp->ndev.state = ncsi_dev_state_suspend; + ncsi_suspend_channel(ndp); + break; + default: + netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n", + nc->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; +} + +#if IS_ENABLED(CONFIG_IPV6) +static int ncsi_inet6addr_event(struct notifier_block *this, + unsigned long event, void *data) +{ + struct inet6_ifaddr *ifa = data; + struct net_device *dev = ifa->idev->dev; + struct ncsi_dev *nd = ncsi_find_dev(dev); + struct ncsi_dev_priv *ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL; + struct ncsi_package *np; + struct ncsi_channel *nc; + struct ncsi_cmd_arg nca; + bool action; + int ret; + + if (!ndp || (ipv6_addr_type(&ifa->addr) & + (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK))) + return NOTIFY_OK; + + switch (event) { + case NETDEV_UP: + action = (++ndp->inet6_addr_num) == 1; + nca.type = NCSI_PKT_CMD_EGMF; + break; + case NETDEV_DOWN: + action = (--ndp->inet6_addr_num == 0); + nca.type = NCSI_PKT_CMD_DGMF; + break; + default: + return NOTIFY_OK; + } + + /* We might not have active channel or packages. The IPv6 + * required multicast will be enabled when active channel + * or packages are chosen. + */ + np = ndp->active_package; + nc = ndp->active_channel; + if (!action || !np || !nc) + return NOTIFY_OK; + + /* We needn't enable or disable it if the function isn't supported */ + if (!(nc->caps[NCSI_CAP_GENERIC].cap & NCSI_CAP_GENERIC_MC)) + return NOTIFY_OK; + + nca.ndp = ndp; + nca.driven = false; + nca.package = np->id; + nca.channel = nc->id; + nca.dwords[0] = nc->caps[NCSI_CAP_MC].cap; + ret = ncsi_xmit_cmd(&nca); + if (ret) { + netdev_warn(dev, "Fail to %s global multicast filter (%d)\n", + (event == NETDEV_UP) ? "enable" : "disable", ret); + return NOTIFY_DONE; + } + + return NOTIFY_OK; +} + +static struct notifier_block ncsi_inet6addr_notifier = { + .notifier_call = ncsi_inet6addr_event, +}; +#endif /* CONFIG_IPV6 */ + +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_WORK(&ndp->work, ncsi_dev_work); + + /* Initialize private NCSI device */ + spin_lock_init(&ndp->lock); + INIT_LIST_HEAD(&ndp->packages); + ndp->request_id = 0; + for (i = 0; i < ARRAY_SIZE(ndp->requests); i++) { + ndp->requests[i].id = i; + ndp->requests[i].ndp = ndp; + setup_timer(&ndp->requests[i].timer, + ncsi_request_timeout, + (unsigned long)&ndp->requests[i]); + } + + spin_lock_irqsave(&ncsi_dev_lock, flags); +#if IS_ENABLED(CONFIG_IPV6) + ndp->inet6_addr_num = 0; + if (list_empty(&ncsi_dev_list)) + register_inet6addr_notifier(&ncsi_inet6addr_notifier); +#endif + 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); + struct ncsi_package *np; + struct ncsi_channel *nc; + int old_state, ret; + + if (nd->state != ncsi_dev_state_registered && + nd->state != ncsi_dev_state_functional) + return -ENOTTY; + + if (!(ndp->flags & NCSI_DEV_PROBED)) { + nd->state = ncsi_dev_state_probe; + schedule_work(&ndp->work); + return 0; + } + + /* Reset channel's state and start over */ + NCSI_FOR_EACH_PACKAGE(ndp, np) { + NCSI_FOR_EACH_CHANNEL(np, nc) { + old_state = xchg(&nc->state, NCSI_CHANNEL_INACTIVE); + WARN_ON_ONCE(!list_empty(&nc->link) || + old_state == NCSI_CHANNEL_INVISIBLE); + } + } + + if (ndp->flags & NCSI_DEV_HWA) + ret = ncsi_enable_hwa(ndp); + else + ret = ncsi_choose_active_channel(ndp); + + return ret; +} +EXPORT_SYMBOL_GPL(ncsi_start_dev); + +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); +#if IS_ENABLED(CONFIG_IPV6) + if (list_empty(&ncsi_dev_list)) + unregister_inet6addr_notifier(&ncsi_inet6addr_notifier); +#endif + spin_unlock_irqrestore(&ncsi_dev_lock, flags); + + kfree(ndp); +} +EXPORT_SYMBOL_GPL(ncsi_unregister_dev); diff --git a/net/ncsi/ncsi-pkt.h b/net/ncsi/ncsi-pkt.h new file mode 100644 index 000000000..3ea49ed0a --- /dev/null +++ b/net/ncsi/ncsi-pkt.h @@ -0,0 +1,415 @@ +/* + * Copyright Gavin Shan, IBM Corporation 2016. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __NCSI_PKT_H__ +#define __NCSI_PKT_H__ + +struct ncsi_pkt_hdr { + unsigned char mc_id; /* Management controller ID */ + unsigned char revision; /* NCSI version - 0x01 */ + unsigned char reserved; /* Reserved */ + unsigned char id; /* Packet sequence number */ + unsigned char type; /* Packet type */ + unsigned char channel; /* Network controller ID */ + __be16 length; /* Payload length */ + __be32 reserved1[2]; /* Reserved */ +}; + +struct ncsi_cmd_pkt_hdr { + struct ncsi_pkt_hdr common; /* Common NCSI packet header */ +}; + +struct ncsi_rsp_pkt_hdr { + struct ncsi_pkt_hdr common; /* Common NCSI packet header */ + __be16 code; /* Response code */ + __be16 reason; /* Response reason */ +}; + +struct ncsi_aen_pkt_hdr { + struct ncsi_pkt_hdr common; /* Common NCSI packet header */ + unsigned char reserved2[3]; /* Reserved */ + unsigned char type; /* AEN packet type */ +}; + +/* NCSI common command packet */ +struct ncsi_cmd_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + __be32 checksum; /* Checksum */ + unsigned char pad[26]; +}; + +struct ncsi_rsp_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* Select Package */ +struct ncsi_cmd_sp_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + unsigned char reserved[3]; /* Reserved */ + unsigned char hw_arbitration; /* HW arbitration */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* Disable Channel */ +struct ncsi_cmd_dc_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + unsigned char reserved[3]; /* Reserved */ + unsigned char ald; /* Allow link down */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* Reset Channel */ +struct ncsi_cmd_rc_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + __be32 reserved; /* Reserved */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* AEN Enable */ +struct ncsi_cmd_ae_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + unsigned char reserved[3]; /* Reserved */ + unsigned char mc_id; /* MC ID */ + __be32 mode; /* AEN working mode */ + __be32 checksum; /* Checksum */ + unsigned char pad[18]; +}; + +/* Set Link */ +struct ncsi_cmd_sl_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + __be32 mode; /* Link working mode */ + __be32 oem_mode; /* OEM link mode */ + __be32 checksum; /* Checksum */ + unsigned char pad[18]; +}; + +/* Set VLAN Filter */ +struct ncsi_cmd_svf_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + __be16 reserved; /* Reserved */ + __be16 vlan; /* VLAN ID */ + __be16 reserved1; /* Reserved */ + unsigned char index; /* VLAN table index */ + unsigned char enable; /* Enable or disable */ + __be32 checksum; /* Checksum */ + unsigned char pad[14]; +}; + +/* Enable VLAN */ +struct ncsi_cmd_ev_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + unsigned char reserved[3]; /* Reserved */ + unsigned char mode; /* VLAN filter mode */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* Set MAC Address */ +struct ncsi_cmd_sma_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + unsigned char mac[6]; /* MAC address */ + unsigned char index; /* MAC table index */ + unsigned char at_e; /* Addr type and operation */ + __be32 checksum; /* Checksum */ + unsigned char pad[18]; +}; + +/* Enable Broadcast Filter */ +struct ncsi_cmd_ebf_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + __be32 mode; /* Filter mode */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* Enable Global Multicast Filter */ +struct ncsi_cmd_egmf_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + __be32 mode; /* Global MC mode */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* Set NCSI Flow Control */ +struct ncsi_cmd_snfc_pkt { + struct ncsi_cmd_pkt_hdr cmd; /* Command header */ + unsigned char reserved[3]; /* Reserved */ + unsigned char mode; /* Flow control mode */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* Get Link Status */ +struct ncsi_rsp_gls_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + __be32 status; /* Link status */ + __be32 other; /* Other indications */ + __be32 oem_status; /* OEM link status */ + __be32 checksum; + unsigned char pad[10]; +}; + +/* Get Version ID */ +struct ncsi_rsp_gvi_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + __be32 ncsi_version; /* NCSI version */ + unsigned char reserved[3]; /* Reserved */ + unsigned char alpha2; /* NCSI version */ + unsigned char fw_name[12]; /* f/w name string */ + __be32 fw_version; /* f/w version */ + __be16 pci_ids[4]; /* PCI IDs */ + __be32 mf_id; /* Manufacture ID */ + __be32 checksum; +}; + +/* Get Capabilities */ +struct ncsi_rsp_gc_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + __be32 cap; /* Capabilities */ + __be32 bc_cap; /* Broadcast cap */ + __be32 mc_cap; /* Multicast cap */ + __be32 buf_cap; /* Buffering cap */ + __be32 aen_cap; /* AEN cap */ + unsigned char vlan_cnt; /* VLAN filter count */ + unsigned char mixed_cnt; /* Mix filter count */ + unsigned char mc_cnt; /* MC filter count */ + unsigned char uc_cnt; /* UC filter count */ + unsigned char reserved[2]; /* Reserved */ + unsigned char vlan_mode; /* VLAN mode */ + unsigned char channel_cnt; /* Channel count */ + __be32 checksum; /* Checksum */ +}; + +/* Get Parameters */ +struct ncsi_rsp_gp_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + unsigned char mac_cnt; /* Number of MAC addr */ + unsigned char reserved[2]; /* Reserved */ + unsigned char mac_enable; /* MAC addr enable flags */ + unsigned char vlan_cnt; /* VLAN tag count */ + unsigned char reserved1; /* Reserved */ + __be16 vlan_enable; /* VLAN tag enable flags */ + __be32 link_mode; /* Link setting */ + __be32 bc_mode; /* BC filter mode */ + __be32 valid_modes; /* Valid mode parameters */ + unsigned char vlan_mode; /* VLAN mode */ + unsigned char fc_mode; /* Flow control mode */ + unsigned char reserved2[2]; /* Reserved */ + __be32 aen_mode; /* AEN mode */ + unsigned char mac[6]; /* Supported MAC addr */ + __be16 vlan; /* Supported VLAN tags */ + __be32 checksum; /* Checksum */ +}; + +/* Get Controller Packet Statistics */ +struct ncsi_rsp_gcps_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + __be32 cnt_hi; /* Counter cleared */ + __be32 cnt_lo; /* Counter cleared */ + __be32 rx_bytes; /* Rx bytes */ + __be32 tx_bytes; /* Tx bytes */ + __be32 rx_uc_pkts; /* Rx UC packets */ + __be32 rx_mc_pkts; /* Rx MC packets */ + __be32 rx_bc_pkts; /* Rx BC packets */ + __be32 tx_uc_pkts; /* Tx UC packets */ + __be32 tx_mc_pkts; /* Tx MC packets */ + __be32 tx_bc_pkts; /* Tx BC packets */ + __be32 fcs_err; /* FCS errors */ + __be32 align_err; /* Alignment errors */ + __be32 false_carrier; /* False carrier detection */ + __be32 runt_pkts; /* Rx runt packets */ + __be32 jabber_pkts; /* Rx jabber packets */ + __be32 rx_pause_xon; /* Rx pause XON frames */ + __be32 rx_pause_xoff; /* Rx XOFF frames */ + __be32 tx_pause_xon; /* Tx XON frames */ + __be32 tx_pause_xoff; /* Tx XOFF frames */ + __be32 tx_s_collision; /* Single collision frames */ + __be32 tx_m_collision; /* Multiple collision frames */ + __be32 l_collision; /* Late collision frames */ + __be32 e_collision; /* Excessive collision frames */ + __be32 rx_ctl_frames; /* Rx control frames */ + __be32 rx_64_frames; /* Rx 64-bytes frames */ + __be32 rx_127_frames; /* Rx 65-127 bytes frames */ + __be32 rx_255_frames; /* Rx 128-255 bytes frames */ + __be32 rx_511_frames; /* Rx 256-511 bytes frames */ + __be32 rx_1023_frames; /* Rx 512-1023 bytes frames */ + __be32 rx_1522_frames; /* Rx 1024-1522 bytes frames */ + __be32 rx_9022_frames; /* Rx 1523-9022 bytes frames */ + __be32 tx_64_frames; /* Tx 64-bytes frames */ + __be32 tx_127_frames; /* Tx 65-127 bytes frames */ + __be32 tx_255_frames; /* Tx 128-255 bytes frames */ + __be32 tx_511_frames; /* Tx 256-511 bytes frames */ + __be32 tx_1023_frames; /* Tx 512-1023 bytes frames */ + __be32 tx_1522_frames; /* Tx 1024-1522 bytes frames */ + __be32 tx_9022_frames; /* Tx 1523-9022 bytes frames */ + __be32 rx_valid_bytes; /* Rx valid bytes */ + __be32 rx_runt_pkts; /* Rx error runt packets */ + __be32 rx_jabber_pkts; /* Rx error jabber packets */ + __be32 checksum; /* Checksum */ +}; + +/* Get NCSI Statistics */ +struct ncsi_rsp_gns_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + __be32 rx_cmds; /* Rx NCSI commands */ + __be32 dropped_cmds; /* Dropped commands */ + __be32 cmd_type_errs; /* Command type errors */ + __be32 cmd_csum_errs; /* Command checksum errors */ + __be32 rx_pkts; /* Rx NCSI packets */ + __be32 tx_pkts; /* Tx NCSI packets */ + __be32 tx_aen_pkts; /* Tx AEN packets */ + __be32 checksum; /* Checksum */ +}; + +/* Get NCSI Pass-through Statistics */ +struct ncsi_rsp_gnpts_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + __be32 tx_pkts; /* Tx packets */ + __be32 tx_dropped; /* Tx dropped packets */ + __be32 tx_channel_err; /* Tx channel errors */ + __be32 tx_us_err; /* Tx undersize errors */ + __be32 rx_pkts; /* Rx packets */ + __be32 rx_dropped; /* Rx dropped packets */ + __be32 rx_channel_err; /* Rx channel errors */ + __be32 rx_us_err; /* Rx undersize errors */ + __be32 rx_os_err; /* Rx oversize errors */ + __be32 checksum; /* Checksum */ +}; + +/* Get package status */ +struct ncsi_rsp_gps_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + __be32 status; /* Hardware arbitration status */ + __be32 checksum; +}; + +/* Get package UUID */ +struct ncsi_rsp_gpuuid_pkt { + struct ncsi_rsp_pkt_hdr rsp; /* Response header */ + unsigned char uuid[16]; /* UUID */ + __be32 checksum; +}; + +/* AEN: Link State Change */ +struct ncsi_aen_lsc_pkt { + struct ncsi_aen_pkt_hdr aen; /* AEN header */ + __be32 status; /* Link status */ + __be32 oem_status; /* OEM link status */ + __be32 checksum; /* Checksum */ + unsigned char pad[14]; +}; + +/* AEN: Configuration Required */ +struct ncsi_aen_cr_pkt { + struct ncsi_aen_pkt_hdr aen; /* AEN header */ + __be32 checksum; /* Checksum */ + unsigned char pad[22]; +}; + +/* AEN: Host Network Controller Driver Status Change */ +struct ncsi_aen_hncdsc_pkt { + struct ncsi_aen_pkt_hdr aen; /* AEN header */ + __be32 status; /* Status */ + __be32 checksum; /* Checksum */ + unsigned char pad[18]; +}; + +/* NCSI packet revision */ +#define NCSI_PKT_REVISION 0x01 + +/* NCSI packet commands */ +#define NCSI_PKT_CMD_CIS 0x00 /* Clear Initial State */ +#define NCSI_PKT_CMD_SP 0x01 /* Select Package */ +#define NCSI_PKT_CMD_DP 0x02 /* Deselect Package */ +#define NCSI_PKT_CMD_EC 0x03 /* Enable Channel */ +#define NCSI_PKT_CMD_DC 0x04 /* Disable Channel */ +#define NCSI_PKT_CMD_RC 0x05 /* Reset Channel */ +#define NCSI_PKT_CMD_ECNT 0x06 /* Enable Channel Network Tx */ +#define NCSI_PKT_CMD_DCNT 0x07 /* Disable Channel Network Tx */ +#define NCSI_PKT_CMD_AE 0x08 /* AEN Enable */ +#define NCSI_PKT_CMD_SL 0x09 /* Set Link */ +#define NCSI_PKT_CMD_GLS 0x0a /* Get Link */ +#define NCSI_PKT_CMD_SVF 0x0b /* Set VLAN Filter */ +#define NCSI_PKT_CMD_EV 0x0c /* Enable VLAN */ +#define NCSI_PKT_CMD_DV 0x0d /* Disable VLAN */ +#define NCSI_PKT_CMD_SMA 0x0e /* Set MAC address */ +#define NCSI_PKT_CMD_EBF 0x10 /* Enable Broadcast Filter */ +#define NCSI_PKT_CMD_DBF 0x11 /* Disable Broadcast Filter */ +#define NCSI_PKT_CMD_EGMF 0x12 /* Enable Global Multicast Filter */ +#define NCSI_PKT_CMD_DGMF 0x13 /* Disable Global Multicast Filter */ +#define NCSI_PKT_CMD_SNFC 0x14 /* Set NCSI Flow Control */ +#define NCSI_PKT_CMD_GVI 0x15 /* Get Version ID */ +#define NCSI_PKT_CMD_GC 0x16 /* Get Capabilities */ +#define NCSI_PKT_CMD_GP 0x17 /* Get Parameters */ +#define NCSI_PKT_CMD_GCPS 0x18 /* Get Controller Packet Statistics */ +#define NCSI_PKT_CMD_GNS 0x19 /* Get NCSI Statistics */ +#define NCSI_PKT_CMD_GNPTS 0x1a /* Get NCSI Pass-throu Statistics */ +#define NCSI_PKT_CMD_GPS 0x1b /* Get package status */ +#define NCSI_PKT_CMD_OEM 0x50 /* OEM */ +#define NCSI_PKT_CMD_PLDM 0x51 /* PLDM request over NCSI over RBT */ +#define NCSI_PKT_CMD_GPUUID 0x52 /* Get package UUID */ + +/* NCSI packet responses */ +#define NCSI_PKT_RSP_CIS (NCSI_PKT_CMD_CIS + 0x80) +#define NCSI_PKT_RSP_SP (NCSI_PKT_CMD_SP + 0x80) +#define NCSI_PKT_RSP_DP (NCSI_PKT_CMD_DP + 0x80) +#define NCSI_PKT_RSP_EC (NCSI_PKT_CMD_EC + 0x80) +#define NCSI_PKT_RSP_DC (NCSI_PKT_CMD_DC + 0x80) +#define NCSI_PKT_RSP_RC (NCSI_PKT_CMD_RC + 0x80) +#define NCSI_PKT_RSP_ECNT (NCSI_PKT_CMD_ECNT + 0x80) +#define NCSI_PKT_RSP_DCNT (NCSI_PKT_CMD_DCNT + 0x80) +#define NCSI_PKT_RSP_AE (NCSI_PKT_CMD_AE + 0x80) +#define NCSI_PKT_RSP_SL (NCSI_PKT_CMD_SL + 0x80) +#define NCSI_PKT_RSP_GLS (NCSI_PKT_CMD_GLS + 0x80) +#define NCSI_PKT_RSP_SVF (NCSI_PKT_CMD_SVF + 0x80) +#define NCSI_PKT_RSP_EV (NCSI_PKT_CMD_EV + 0x80) +#define NCSI_PKT_RSP_DV (NCSI_PKT_CMD_DV + 0x80) +#define NCSI_PKT_RSP_SMA (NCSI_PKT_CMD_SMA + 0x80) +#define NCSI_PKT_RSP_EBF (NCSI_PKT_CMD_EBF + 0x80) +#define NCSI_PKT_RSP_DBF (NCSI_PKT_CMD_DBF + 0x80) +#define NCSI_PKT_RSP_EGMF (NCSI_PKT_CMD_EGMF + 0x80) +#define NCSI_PKT_RSP_DGMF (NCSI_PKT_CMD_DGMF + 0x80) +#define NCSI_PKT_RSP_SNFC (NCSI_PKT_CMD_SNFC + 0x80) +#define NCSI_PKT_RSP_GVI (NCSI_PKT_CMD_GVI + 0x80) +#define NCSI_PKT_RSP_GC (NCSI_PKT_CMD_GC + 0x80) +#define NCSI_PKT_RSP_GP (NCSI_PKT_CMD_GP + 0x80) +#define NCSI_PKT_RSP_GCPS (NCSI_PKT_CMD_GCPS + 0x80) +#define NCSI_PKT_RSP_GNS (NCSI_PKT_CMD_GNS + 0x80) +#define NCSI_PKT_RSP_GNPTS (NCSI_PKT_CMD_GNPTS + 0x80) +#define NCSI_PKT_RSP_GPS (NCSI_PKT_CMD_GPS + 0x80) +#define NCSI_PKT_RSP_OEM (NCSI_PKT_CMD_OEM + 0x80) +#define NCSI_PKT_RSP_PLDM (NCSI_PKT_CMD_PLDM + 0x80) +#define NCSI_PKT_RSP_GPUUID (NCSI_PKT_CMD_GPUUID + 0x80) + +/* NCSI response code/reason */ +#define NCSI_PKT_RSP_C_COMPLETED 0x0000 /* Command Completed */ +#define NCSI_PKT_RSP_C_FAILED 0x0001 /* Command Failed */ +#define NCSI_PKT_RSP_C_UNAVAILABLE 0x0002 /* Command Unavailable */ +#define NCSI_PKT_RSP_C_UNSUPPORTED 0x0003 /* Command Unsupported */ +#define NCSI_PKT_RSP_R_NO_ERROR 0x0000 /* No Error */ +#define NCSI_PKT_RSP_R_INTERFACE 0x0001 /* Interface not ready */ +#define NCSI_PKT_RSP_R_PARAM 0x0002 /* Invalid Parameter */ +#define NCSI_PKT_RSP_R_CHANNEL 0x0003 /* Channel not Ready */ +#define NCSI_PKT_RSP_R_PACKAGE 0x0004 /* Package not Ready */ +#define NCSI_PKT_RSP_R_LENGTH 0x0005 /* Invalid payload length */ +#define NCSI_PKT_RSP_R_UNKNOWN 0x7fff /* Command type unsupported */ + +/* NCSI AEN packet type */ +#define NCSI_PKT_AEN 0xFF /* AEN Packet */ +#define NCSI_PKT_AEN_LSC 0x00 /* Link status change */ +#define NCSI_PKT_AEN_CR 0x01 /* Configuration required */ +#define NCSI_PKT_AEN_HNCDSC 0x02 /* HNC driver status change */ + +#endif /* __NCSI_PKT_H__ */ diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c new file mode 100644 index 000000000..af84389a6 --- /dev/null +++ b/net/ncsi/ncsi-rsp.c @@ -0,0 +1,1035 @@ +/* + * Copyright Gavin Shan, IBM Corporation 2016. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#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 "internal.h" +#include "ncsi-pkt.h" + +static int ncsi_validate_rsp_pkt(struct ncsi_request *nr, + unsigned short payload) +{ + struct ncsi_rsp_pkt_hdr *h; + u32 checksum; + __be32 *pchecksum; + + /* Check NCSI packet header. We don't need validate + * the packet type, which should have been checked + * before calling this function. + */ + h = (struct ncsi_rsp_pkt_hdr *)skb_network_header(nr->rsp); + if (h->common.revision != NCSI_PKT_REVISION) + return -EINVAL; + if (ntohs(h->common.length) != payload) + return -EINVAL; + + /* Check on code and reason */ + if (ntohs(h->code) != NCSI_PKT_RSP_C_COMPLETED || + ntohs(h->reason) != NCSI_PKT_RSP_R_NO_ERROR) + return -EINVAL; + + /* Validate checksum, which might be zeroes if the + * sender doesn't support checksum according to NCSI + * specification. + */ + pchecksum = (__be32 *)((void *)(h + 1) + payload - 4); + if (ntohl(*pchecksum) == 0) + return 0; + + checksum = ncsi_calculate_checksum((unsigned char *)h, + sizeof(*h) + payload - 4); + if (*pchecksum != htonl(checksum)) + return -EINVAL; + + return 0; +} + +static int ncsi_rsp_handler_cis(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_package *np; + struct ncsi_channel *nc; + unsigned char id; + + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, &np, &nc); + if (!nc) { + if (ndp->flags & NCSI_DEV_PROBED) + return -ENXIO; + + id = NCSI_CHANNEL_INDEX(rsp->rsp.common.channel); + nc = ncsi_add_channel(np, id); + } + + return nc ? 0 : -ENODEV; +} + +static int ncsi_rsp_handler_sp(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_package *np; + unsigned char id; + + /* Add the package if it's not existing. Otherwise, + * to change the state of its child channels. + */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + &np, NULL); + if (!np) { + if (ndp->flags & NCSI_DEV_PROBED) + return -ENXIO; + + id = NCSI_PACKAGE_INDEX(rsp->rsp.common.channel); + np = ncsi_add_package(ndp, id); + if (!np) + return -ENODEV; + } + + return 0; +} + +static int ncsi_rsp_handler_dp(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_package *np; + struct ncsi_channel *nc; + unsigned long flags; + + /* Find the package */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + &np, NULL); + if (!np) + return -ENODEV; + + /* Change state of all channels attached to the package */ + NCSI_FOR_EACH_CHANNEL(np, nc) { + spin_lock_irqsave(&nc->lock, flags); + nc->state = NCSI_CHANNEL_INACTIVE; + spin_unlock_irqrestore(&nc->lock, flags); + } + + return 0; +} + +static int ncsi_rsp_handler_ec(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + ncm = &nc->modes[NCSI_MODE_ENABLE]; + if (ncm->enable) + return -EBUSY; + + ncm->enable = 1; + return 0; +} + +static int ncsi_rsp_handler_dc(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + int ret; + + ret = ncsi_validate_rsp_pkt(nr, 4); + if (ret) + return ret; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + ncm = &nc->modes[NCSI_MODE_ENABLE]; + if (!ncm->enable) + return -EBUSY; + + ncm->enable = 0; + return 0; +} + +static int ncsi_rsp_handler_rc(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + unsigned long flags; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Update state for the specified channel */ + spin_lock_irqsave(&nc->lock, flags); + nc->state = NCSI_CHANNEL_INACTIVE; + spin_unlock_irqrestore(&nc->lock, flags); + + return 0; +} + +static int ncsi_rsp_handler_ecnt(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + ncm = &nc->modes[NCSI_MODE_TX_ENABLE]; + if (ncm->enable) + return -EBUSY; + + ncm->enable = 1; + return 0; +} + +static int ncsi_rsp_handler_dcnt(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + ncm = &nc->modes[NCSI_MODE_TX_ENABLE]; + if (!ncm->enable) + return -EBUSY; + + ncm->enable = 1; + return 0; +} + +static int ncsi_rsp_handler_ae(struct ncsi_request *nr) +{ + struct ncsi_cmd_ae_pkt *cmd; + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Check if the AEN has been enabled */ + ncm = &nc->modes[NCSI_MODE_AEN]; + if (ncm->enable) + return -EBUSY; + + /* Update to AEN configuration */ + cmd = (struct ncsi_cmd_ae_pkt *)skb_network_header(nr->cmd); + ncm->enable = 1; + ncm->data[0] = cmd->mc_id; + ncm->data[1] = ntohl(cmd->mode); + + return 0; +} + +static int ncsi_rsp_handler_sl(struct ncsi_request *nr) +{ + struct ncsi_cmd_sl_pkt *cmd; + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + cmd = (struct ncsi_cmd_sl_pkt *)skb_network_header(nr->cmd); + ncm = &nc->modes[NCSI_MODE_LINK]; + ncm->data[0] = ntohl(cmd->mode); + ncm->data[1] = ntohl(cmd->oem_mode); + + return 0; +} + +static int ncsi_rsp_handler_gls(struct ncsi_request *nr) +{ + struct ncsi_rsp_gls_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + unsigned long flags; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_gls_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + ncm = &nc->modes[NCSI_MODE_LINK]; + ncm->data[2] = ntohl(rsp->status); + ncm->data[3] = ntohl(rsp->other); + ncm->data[4] = ntohl(rsp->oem_status); + + if (nr->driven) + return 0; + + /* Reset the channel monitor if it has been enabled */ + spin_lock_irqsave(&nc->lock, flags); + nc->timeout = 0; + spin_unlock_irqrestore(&nc->lock, flags); + + return 0; +} + +static int ncsi_rsp_handler_svf(struct ncsi_request *nr) +{ + struct ncsi_cmd_svf_pkt *cmd; + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_filter *ncf; + unsigned short vlan; + int ret; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + cmd = (struct ncsi_cmd_svf_pkt *)skb_network_header(nr->cmd); + ncf = nc->filters[NCSI_FILTER_VLAN]; + if (!ncf) + return -ENOENT; + if (cmd->index >= ncf->total) + return -ERANGE; + + /* Add or remove the VLAN filter */ + if (!(cmd->enable & 0x1)) { + ret = ncsi_remove_filter(nc, NCSI_FILTER_VLAN, cmd->index); + } else { + vlan = ntohs(cmd->vlan); + ret = ncsi_add_filter(nc, NCSI_FILTER_VLAN, &vlan); + } + + return ret; +} + +static int ncsi_rsp_handler_ev(struct ncsi_request *nr) +{ + struct ncsi_cmd_ev_pkt *cmd; + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Check if VLAN mode has been enabled */ + ncm = &nc->modes[NCSI_MODE_VLAN]; + if (ncm->enable) + return -EBUSY; + + /* Update to VLAN mode */ + cmd = (struct ncsi_cmd_ev_pkt *)skb_network_header(nr->cmd); + ncm->enable = 1; + ncm->data[0] = ntohl(cmd->mode); + + return 0; +} + +static int ncsi_rsp_handler_dv(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Check if VLAN mode has been enabled */ + ncm = &nc->modes[NCSI_MODE_VLAN]; + if (!ncm->enable) + return -EBUSY; + + /* Update to VLAN mode */ + ncm->enable = 0; + return 0; +} + +static int ncsi_rsp_handler_sma(struct ncsi_request *nr) +{ + struct ncsi_cmd_sma_pkt *cmd; + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_filter *ncf; + void *bitmap; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* According to NCSI spec 1.01, the mixed filter table + * isn't supported yet. + */ + cmd = (struct ncsi_cmd_sma_pkt *)skb_network_header(nr->cmd); + switch (cmd->at_e >> 5) { + case 0x0: /* UC address */ + ncf = nc->filters[NCSI_FILTER_UC]; + break; + case 0x1: /* MC address */ + ncf = nc->filters[NCSI_FILTER_MC]; + break; + default: + return -EINVAL; + } + + /* Sanity check on the filter */ + if (!ncf) + return -ENOENT; + else if (cmd->index >= ncf->total) + return -ERANGE; + + bitmap = &ncf->bitmap; + if (cmd->at_e & 0x1) { + if (test_and_set_bit(cmd->index, bitmap)) + return -EBUSY; + memcpy(ncf->data + 6 * cmd->index, cmd->mac, 6); + } else { + if (!test_and_clear_bit(cmd->index, bitmap)) + return -EBUSY; + + memset(ncf->data + 6 * cmd->index, 0, 6); + } + + return 0; +} + +static int ncsi_rsp_handler_ebf(struct ncsi_request *nr) +{ + struct ncsi_cmd_ebf_pkt *cmd; + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the package and channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, NULL, &nc); + if (!nc) + return -ENODEV; + + /* Check if broadcast filter has been enabled */ + ncm = &nc->modes[NCSI_MODE_BC]; + if (ncm->enable) + return -EBUSY; + + /* Update to broadcast filter mode */ + cmd = (struct ncsi_cmd_ebf_pkt *)skb_network_header(nr->cmd); + ncm->enable = 1; + ncm->data[0] = ntohl(cmd->mode); + + return 0; +} + +static int ncsi_rsp_handler_dbf(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Check if broadcast filter isn't enabled */ + ncm = &nc->modes[NCSI_MODE_BC]; + if (!ncm->enable) + return -EBUSY; + + /* Update to broadcast filter mode */ + ncm->enable = 0; + ncm->data[0] = 0; + + return 0; +} + +static int ncsi_rsp_handler_egmf(struct ncsi_request *nr) +{ + struct ncsi_cmd_egmf_pkt *cmd; + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Check if multicast filter has been enabled */ + ncm = &nc->modes[NCSI_MODE_MC]; + if (ncm->enable) + return -EBUSY; + + /* Update to multicast filter mode */ + cmd = (struct ncsi_cmd_egmf_pkt *)skb_network_header(nr->cmd); + ncm->enable = 1; + ncm->data[0] = ntohl(cmd->mode); + + return 0; +} + +static int ncsi_rsp_handler_dgmf(struct ncsi_request *nr) +{ + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Check if multicast filter has been enabled */ + ncm = &nc->modes[NCSI_MODE_MC]; + if (!ncm->enable) + return -EBUSY; + + /* Update to multicast filter mode */ + ncm->enable = 0; + ncm->data[0] = 0; + + return 0; +} + +static int ncsi_rsp_handler_snfc(struct ncsi_request *nr) +{ + struct ncsi_cmd_snfc_pkt *cmd; + struct ncsi_rsp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_mode *ncm; + + /* Find the channel */ + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Check if flow control has been enabled */ + ncm = &nc->modes[NCSI_MODE_FC]; + if (ncm->enable) + return -EBUSY; + + /* Update to flow control mode */ + cmd = (struct ncsi_cmd_snfc_pkt *)skb_network_header(nr->cmd); + ncm->enable = 1; + ncm->data[0] = cmd->mode; + + return 0; +} + +static int ncsi_rsp_handler_gvi(struct ncsi_request *nr) +{ + struct ncsi_rsp_gvi_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_version *ncv; + int i; + + /* Find the channel */ + rsp = (struct ncsi_rsp_gvi_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Update to channel's version info */ + ncv = &nc->version; + ncv->version = ntohl(rsp->ncsi_version); + ncv->alpha2 = rsp->alpha2; + memcpy(ncv->fw_name, rsp->fw_name, 12); + ncv->fw_version = ntohl(rsp->fw_version); + for (i = 0; i < ARRAY_SIZE(ncv->pci_ids); i++) + ncv->pci_ids[i] = ntohs(rsp->pci_ids[i]); + ncv->mf_id = ntohl(rsp->mf_id); + + return 0; +} + +static int ncsi_rsp_handler_gc(struct ncsi_request *nr) +{ + struct ncsi_rsp_gc_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_filter *ncf; + size_t size, entry_size; + int cnt, i; + + /* Find the channel */ + rsp = (struct ncsi_rsp_gc_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Update channel's capabilities */ + nc->caps[NCSI_CAP_GENERIC].cap = ntohl(rsp->cap) & + NCSI_CAP_GENERIC_MASK; + nc->caps[NCSI_CAP_BC].cap = ntohl(rsp->bc_cap) & + NCSI_CAP_BC_MASK; + nc->caps[NCSI_CAP_MC].cap = ntohl(rsp->mc_cap) & + NCSI_CAP_MC_MASK; + nc->caps[NCSI_CAP_BUFFER].cap = ntohl(rsp->buf_cap); + nc->caps[NCSI_CAP_AEN].cap = ntohl(rsp->aen_cap) & + NCSI_CAP_AEN_MASK; + nc->caps[NCSI_CAP_VLAN].cap = rsp->vlan_mode & + NCSI_CAP_VLAN_MASK; + + /* Build filters */ + for (i = 0; i < NCSI_FILTER_MAX; i++) { + switch (i) { + case NCSI_FILTER_VLAN: + cnt = rsp->vlan_cnt; + entry_size = 2; + break; + case NCSI_FILTER_MIXED: + cnt = rsp->mixed_cnt; + entry_size = 6; + break; + case NCSI_FILTER_MC: + cnt = rsp->mc_cnt; + entry_size = 6; + break; + case NCSI_FILTER_UC: + cnt = rsp->uc_cnt; + entry_size = 6; + break; + default: + continue; + } + + if (!cnt || nc->filters[i]) + continue; + + size = sizeof(*ncf) + cnt * entry_size; + ncf = kzalloc(size, GFP_ATOMIC); + if (!ncf) { + pr_warn("%s: Cannot alloc filter table (%d)\n", + __func__, i); + return -ENOMEM; + } + + ncf->index = i; + ncf->total = cnt; + ncf->bitmap = 0x0ul; + nc->filters[i] = ncf; + } + + return 0; +} + +static int ncsi_rsp_handler_gp(struct ncsi_request *nr) +{ + struct ncsi_rsp_gp_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + unsigned short enable, vlan; + unsigned char *pdata; + int table, i; + + /* Find the channel */ + rsp = (struct ncsi_rsp_gp_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Modes with explicit enabled indications */ + if (ntohl(rsp->valid_modes) & 0x1) { /* BC filter mode */ + nc->modes[NCSI_MODE_BC].enable = 1; + nc->modes[NCSI_MODE_BC].data[0] = ntohl(rsp->bc_mode); + } + if (ntohl(rsp->valid_modes) & 0x2) /* Channel enabled */ + nc->modes[NCSI_MODE_ENABLE].enable = 1; + if (ntohl(rsp->valid_modes) & 0x4) /* Channel Tx enabled */ + nc->modes[NCSI_MODE_TX_ENABLE].enable = 1; + if (ntohl(rsp->valid_modes) & 0x8) /* MC filter mode */ + nc->modes[NCSI_MODE_MC].enable = 1; + + /* Modes without explicit enabled indications */ + nc->modes[NCSI_MODE_LINK].enable = 1; + nc->modes[NCSI_MODE_LINK].data[0] = ntohl(rsp->link_mode); + nc->modes[NCSI_MODE_VLAN].enable = 1; + nc->modes[NCSI_MODE_VLAN].data[0] = rsp->vlan_mode; + nc->modes[NCSI_MODE_FC].enable = 1; + nc->modes[NCSI_MODE_FC].data[0] = rsp->fc_mode; + nc->modes[NCSI_MODE_AEN].enable = 1; + nc->modes[NCSI_MODE_AEN].data[0] = ntohl(rsp->aen_mode); + + /* MAC addresses filter table */ + pdata = (unsigned char *)rsp + 48; + enable = rsp->mac_enable; + for (i = 0; i < rsp->mac_cnt; i++, pdata += 6) { + if (i >= (nc->filters[NCSI_FILTER_UC]->total + + nc->filters[NCSI_FILTER_MC]->total)) + table = NCSI_FILTER_MIXED; + else if (i >= nc->filters[NCSI_FILTER_UC]->total) + table = NCSI_FILTER_MC; + else + table = NCSI_FILTER_UC; + + if (!(enable & (0x1 << i))) + continue; + + if (ncsi_find_filter(nc, table, pdata) >= 0) + continue; + + ncsi_add_filter(nc, table, pdata); + } + + /* VLAN filter table */ + enable = ntohs(rsp->vlan_enable); + for (i = 0; i < rsp->vlan_cnt; i++, pdata += 2) { + if (!(enable & (0x1 << i))) + continue; + + vlan = ntohs(*(__be16 *)pdata); + if (ncsi_find_filter(nc, NCSI_FILTER_VLAN, &vlan) >= 0) + continue; + + ncsi_add_filter(nc, NCSI_FILTER_VLAN, &vlan); + } + + return 0; +} + +static int ncsi_rsp_handler_gcps(struct ncsi_request *nr) +{ + struct ncsi_rsp_gcps_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_stats *ncs; + + /* Find the channel */ + rsp = (struct ncsi_rsp_gcps_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Update HNC's statistics */ + ncs = &nc->stats; + ncs->hnc_cnt_hi = ntohl(rsp->cnt_hi); + ncs->hnc_cnt_lo = ntohl(rsp->cnt_lo); + ncs->hnc_rx_bytes = ntohl(rsp->rx_bytes); + ncs->hnc_tx_bytes = ntohl(rsp->tx_bytes); + ncs->hnc_rx_uc_pkts = ntohl(rsp->rx_uc_pkts); + ncs->hnc_rx_mc_pkts = ntohl(rsp->rx_mc_pkts); + ncs->hnc_rx_bc_pkts = ntohl(rsp->rx_bc_pkts); + ncs->hnc_tx_uc_pkts = ntohl(rsp->tx_uc_pkts); + ncs->hnc_tx_mc_pkts = ntohl(rsp->tx_mc_pkts); + ncs->hnc_tx_bc_pkts = ntohl(rsp->tx_bc_pkts); + ncs->hnc_fcs_err = ntohl(rsp->fcs_err); + ncs->hnc_align_err = ntohl(rsp->align_err); + ncs->hnc_false_carrier = ntohl(rsp->false_carrier); + ncs->hnc_runt_pkts = ntohl(rsp->runt_pkts); + ncs->hnc_jabber_pkts = ntohl(rsp->jabber_pkts); + ncs->hnc_rx_pause_xon = ntohl(rsp->rx_pause_xon); + ncs->hnc_rx_pause_xoff = ntohl(rsp->rx_pause_xoff); + ncs->hnc_tx_pause_xon = ntohl(rsp->tx_pause_xon); + ncs->hnc_tx_pause_xoff = ntohl(rsp->tx_pause_xoff); + ncs->hnc_tx_s_collision = ntohl(rsp->tx_s_collision); + ncs->hnc_tx_m_collision = ntohl(rsp->tx_m_collision); + ncs->hnc_l_collision = ntohl(rsp->l_collision); + ncs->hnc_e_collision = ntohl(rsp->e_collision); + ncs->hnc_rx_ctl_frames = ntohl(rsp->rx_ctl_frames); + ncs->hnc_rx_64_frames = ntohl(rsp->rx_64_frames); + ncs->hnc_rx_127_frames = ntohl(rsp->rx_127_frames); + ncs->hnc_rx_255_frames = ntohl(rsp->rx_255_frames); + ncs->hnc_rx_511_frames = ntohl(rsp->rx_511_frames); + ncs->hnc_rx_1023_frames = ntohl(rsp->rx_1023_frames); + ncs->hnc_rx_1522_frames = ntohl(rsp->rx_1522_frames); + ncs->hnc_rx_9022_frames = ntohl(rsp->rx_9022_frames); + ncs->hnc_tx_64_frames = ntohl(rsp->tx_64_frames); + ncs->hnc_tx_127_frames = ntohl(rsp->tx_127_frames); + ncs->hnc_tx_255_frames = ntohl(rsp->tx_255_frames); + ncs->hnc_tx_511_frames = ntohl(rsp->tx_511_frames); + ncs->hnc_tx_1023_frames = ntohl(rsp->tx_1023_frames); + ncs->hnc_tx_1522_frames = ntohl(rsp->tx_1522_frames); + ncs->hnc_tx_9022_frames = ntohl(rsp->tx_9022_frames); + ncs->hnc_rx_valid_bytes = ntohl(rsp->rx_valid_bytes); + ncs->hnc_rx_runt_pkts = ntohl(rsp->rx_runt_pkts); + ncs->hnc_rx_jabber_pkts = ntohl(rsp->rx_jabber_pkts); + + return 0; +} + +static int ncsi_rsp_handler_gns(struct ncsi_request *nr) +{ + struct ncsi_rsp_gns_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_stats *ncs; + + /* Find the channel */ + rsp = (struct ncsi_rsp_gns_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Update HNC's statistics */ + ncs = &nc->stats; + ncs->ncsi_rx_cmds = ntohl(rsp->rx_cmds); + ncs->ncsi_dropped_cmds = ntohl(rsp->dropped_cmds); + ncs->ncsi_cmd_type_errs = ntohl(rsp->cmd_type_errs); + ncs->ncsi_cmd_csum_errs = ntohl(rsp->cmd_csum_errs); + ncs->ncsi_rx_pkts = ntohl(rsp->rx_pkts); + ncs->ncsi_tx_pkts = ntohl(rsp->tx_pkts); + ncs->ncsi_tx_aen_pkts = ntohl(rsp->tx_aen_pkts); + + return 0; +} + +static int ncsi_rsp_handler_gnpts(struct ncsi_request *nr) +{ + struct ncsi_rsp_gnpts_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_channel *nc; + struct ncsi_channel_stats *ncs; + + /* Find the channel */ + rsp = (struct ncsi_rsp_gnpts_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + NULL, &nc); + if (!nc) + return -ENODEV; + + /* Update HNC's statistics */ + ncs = &nc->stats; + ncs->pt_tx_pkts = ntohl(rsp->tx_pkts); + ncs->pt_tx_dropped = ntohl(rsp->tx_dropped); + ncs->pt_tx_channel_err = ntohl(rsp->tx_channel_err); + ncs->pt_tx_us_err = ntohl(rsp->tx_us_err); + ncs->pt_rx_pkts = ntohl(rsp->rx_pkts); + ncs->pt_rx_dropped = ntohl(rsp->rx_dropped); + ncs->pt_rx_channel_err = ntohl(rsp->rx_channel_err); + ncs->pt_rx_us_err = ntohl(rsp->rx_us_err); + ncs->pt_rx_os_err = ntohl(rsp->rx_os_err); + + return 0; +} + +static int ncsi_rsp_handler_gps(struct ncsi_request *nr) +{ + struct ncsi_rsp_gps_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_package *np; + + /* Find the package */ + rsp = (struct ncsi_rsp_gps_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + &np, NULL); + if (!np) + return -ENODEV; + + return 0; +} + +static int ncsi_rsp_handler_gpuuid(struct ncsi_request *nr) +{ + struct ncsi_rsp_gpuuid_pkt *rsp; + struct ncsi_dev_priv *ndp = nr->ndp; + struct ncsi_package *np; + + /* Find the package */ + rsp = (struct ncsi_rsp_gpuuid_pkt *)skb_network_header(nr->rsp); + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, + &np, NULL); + if (!np) + return -ENODEV; + + memcpy(np->uuid, rsp->uuid, sizeof(rsp->uuid)); + + return 0; +} + +static struct ncsi_rsp_handler { + unsigned char type; + int payload; + int (*handler)(struct ncsi_request *nr); +} ncsi_rsp_handlers[] = { + { NCSI_PKT_RSP_CIS, 4, ncsi_rsp_handler_cis }, + { NCSI_PKT_RSP_SP, 4, ncsi_rsp_handler_sp }, + { NCSI_PKT_RSP_DP, 4, ncsi_rsp_handler_dp }, + { NCSI_PKT_RSP_EC, 4, ncsi_rsp_handler_ec }, + { NCSI_PKT_RSP_DC, 4, ncsi_rsp_handler_dc }, + { NCSI_PKT_RSP_RC, 4, ncsi_rsp_handler_rc }, + { NCSI_PKT_RSP_ECNT, 4, ncsi_rsp_handler_ecnt }, + { NCSI_PKT_RSP_DCNT, 4, ncsi_rsp_handler_dcnt }, + { NCSI_PKT_RSP_AE, 4, ncsi_rsp_handler_ae }, + { NCSI_PKT_RSP_SL, 4, ncsi_rsp_handler_sl }, + { NCSI_PKT_RSP_GLS, 16, ncsi_rsp_handler_gls }, + { NCSI_PKT_RSP_SVF, 4, ncsi_rsp_handler_svf }, + { NCSI_PKT_RSP_EV, 4, ncsi_rsp_handler_ev }, + { NCSI_PKT_RSP_DV, 4, ncsi_rsp_handler_dv }, + { NCSI_PKT_RSP_SMA, 4, ncsi_rsp_handler_sma }, + { NCSI_PKT_RSP_EBF, 4, ncsi_rsp_handler_ebf }, + { NCSI_PKT_RSP_DBF, 4, ncsi_rsp_handler_dbf }, + { NCSI_PKT_RSP_EGMF, 4, ncsi_rsp_handler_egmf }, + { NCSI_PKT_RSP_DGMF, 4, ncsi_rsp_handler_dgmf }, + { NCSI_PKT_RSP_SNFC, 4, ncsi_rsp_handler_snfc }, + { NCSI_PKT_RSP_GVI, 36, ncsi_rsp_handler_gvi }, + { NCSI_PKT_RSP_GC, 32, ncsi_rsp_handler_gc }, + { NCSI_PKT_RSP_GP, -1, ncsi_rsp_handler_gp }, + { NCSI_PKT_RSP_GCPS, 172, ncsi_rsp_handler_gcps }, + { NCSI_PKT_RSP_GNS, 172, ncsi_rsp_handler_gns }, + { NCSI_PKT_RSP_GNPTS, 172, ncsi_rsp_handler_gnpts }, + { NCSI_PKT_RSP_GPS, 8, ncsi_rsp_handler_gps }, + { NCSI_PKT_RSP_OEM, 0, NULL }, + { NCSI_PKT_RSP_PLDM, 0, NULL }, + { NCSI_PKT_RSP_GPUUID, 20, ncsi_rsp_handler_gpuuid } +}; + +int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt, struct net_device *orig_dev) +{ + struct ncsi_rsp_handler *nrh = NULL; + struct ncsi_dev *nd; + struct ncsi_dev_priv *ndp; + struct ncsi_request *nr; + struct ncsi_pkt_hdr *hdr; + unsigned long flags; + int payload, i, ret; + + /* Find the NCSI device */ + nd = ncsi_find_dev(dev); + ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL; + if (!ndp) + return -ENODEV; + + /* Check if it is AEN packet */ + hdr = (struct ncsi_pkt_hdr *)skb_network_header(skb); + if (hdr->type == NCSI_PKT_AEN) + return ncsi_aen_handler(ndp, skb); + + /* Find the handler */ + for (i = 0; i < ARRAY_SIZE(ncsi_rsp_handlers); i++) { + if (ncsi_rsp_handlers[i].type == hdr->type) { + if (ncsi_rsp_handlers[i].handler) + nrh = &ncsi_rsp_handlers[i]; + else + nrh = NULL; + + break; + } + } + + if (!nrh) { + netdev_err(nd->dev, "Received unrecognized packet (0x%x)\n", + hdr->type); + return -ENOENT; + } + + /* Associate with the request */ + spin_lock_irqsave(&ndp->lock, flags); + nr = &ndp->requests[hdr->id]; + if (!nr->used) { + spin_unlock_irqrestore(&ndp->lock, flags); + return -ENODEV; + } + + nr->rsp = skb; + if (!nr->enabled) { + spin_unlock_irqrestore(&ndp->lock, flags); + ret = -ENOENT; + goto out; + } + + /* Validate the packet */ + spin_unlock_irqrestore(&ndp->lock, flags); + payload = nrh->payload; + if (payload < 0) + payload = ntohs(hdr->length); + ret = ncsi_validate_rsp_pkt(nr, payload); + if (ret) + goto out; + + /* Process the packet */ + ret = nrh->handler(nr); +out: + ncsi_free_request(nr); + return ret; +} |