Release 4.11 net/ncsi/ncsi-rsp.c
/*
* 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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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->flags & NCSI_REQ_FLAG_EVENT_DRIVEN)
return 0;
/* Reset the channel monitor if it has been enabled */
spin_lock_irqsave(&nc->lock, flags);
nc->monitor.state = NCSI_CHANNEL_MONITOR_START;
spin_unlock_irqrestore(&nc->lock, flags);
return 0;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;
}
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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;