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iwlwifi: mvm: support packet injection 

For automatic testing packet injection can be useful.
Support injection through debugfs.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Sara Sharon 2016-08-09 20:03:52 +03:00 committed by Luca Coelho
parent aacf8f189b
commit 4857d6cbf7
1 changed files with 55 additions and 0 deletions
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55
drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
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@ -917,6 +917,59 @@ static ssize_t iwl_dbgfs_indirection_tbl_write(struct iwl_mvm *mvm,
return ret ?: count;
}
static ssize_t iwl_dbgfs_inject_packet_write(struct iwl_mvm *mvm,
char *buf, size_t count,
loff_t *ppos)
{
struct iwl_rx_cmd_buffer rxb = {
._rx_page_order = 0,
.truesize = 0, /* not used */
._offset = 0,
};
struct iwl_rx_packet *pkt;
struct iwl_rx_mpdu_desc *desc;
int bin_len = count / 2;
int ret = -EINVAL;
/* supporting only 9000 descriptor */
if (!mvm->trans->cfg->mq_rx_supported)
return -ENOTSUPP;
rxb._page = alloc_pages(GFP_ATOMIC, 0);
if (!rxb._page)
return -ENOMEM;
pkt = rxb_addr(&rxb);
ret = hex2bin(page_address(rxb._page), buf, bin_len);
if (ret)
goto out;
/* avoid invalid memory access */
if (bin_len < sizeof(*pkt) + sizeof(*desc))
goto out;
/* check this is RX packet */
if (WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd) !=
WIDE_ID(LEGACY_GROUP, REPLY_RX_MPDU_CMD))
goto out;
/* check the length in metadata matches actual received length */
desc = (void *)pkt->data;
if (le16_to_cpu(desc->mpdu_len) !=
(bin_len - sizeof(*desc) - sizeof(*pkt)))
goto out;
local_bh_disable();
iwl_mvm_rx_mpdu_mq(mvm, NULL, &rxb, 0);
local_bh_enable();
ret = 0;
out:
iwl_free_rxb(&rxb);
return ret ?: count;
}
static ssize_t iwl_dbgfs_fw_dbg_conf_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
@ -1454,6 +1507,7 @@ MVM_DEBUGFS_WRITE_FILE_OPS(cont_recording, 8);
MVM_DEBUGFS_WRITE_FILE_OPS(max_amsdu_len, 8);
MVM_DEBUGFS_WRITE_FILE_OPS(indirection_tbl,
(IWL_RSS_INDIRECTION_TABLE_SIZE * 2));
MVM_DEBUGFS_WRITE_FILE_OPS(inject_packet, 512);
#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
MVM_DEBUGFS_READ_WRITE_FILE_OPS(bcast_filters, 256);
@ -1502,6 +1556,7 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
MVM_DEBUGFS_ADD_FILE(send_echo_cmd, mvm->debugfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE(cont_recording, mvm->debugfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE(indirection_tbl, mvm->debugfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE(inject_packet, mvm->debugfs_dir, S_IWUSR);
if (!debugfs_create_bool("enable_scan_iteration_notif",
S_IRUSR | S_IWUSR,
mvm->debugfs_dir,