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qed: Add ll2 connection for processing unaligned MPA packets

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This patch adds only the establishment and termination of the
ll2 connection that handles unaligned MPA packets.

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kalderon 2017-10-09 12:37:49 +03:00 committed by David S. Miller
parent 6f34a284f3
commit ae3488ff37
2 changed files with 66 additions and 0 deletions
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65
drivers/net/ethernet/qlogic/qed/qed_iwarp.c
View File

@ -1713,6 +1713,19 @@ qed_iwarp_parse_rx_pkt(struct qed_hwfn *p_hwfn,
return 0;
}
/* fpdu can be fragmented over maximum 3 bds: header, partial mpa, unaligned */
#define QED_IWARP_MAX_BDS_PER_FPDU 3
static void
qed_iwarp_ll2_comp_mpa_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
{
struct qed_iwarp_info *iwarp_info;
struct qed_hwfn *p_hwfn = cxt;
iwarp_info = &p_hwfn->p_rdma_info->iwarp;
qed_iwarp_ll2_post_rx(p_hwfn, data->cookie,
iwarp_info->ll2_mpa_handle);
}
static void
qed_iwarp_ll2_comp_syn_pkt(void *cxt, struct qed_ll2_comp_rx_data *data)
{
@ -1877,6 +1890,13 @@ static void qed_iwarp_ll2_rel_tx_pkt(void *cxt, u8 connection_handle,
kfree(buffer);
}
void
qed_iwarp_ll2_slowpath(void *cxt,
u8 connection_handle,
u32 opaque_data_0, u32 opaque_data_1)
{
}
static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
struct qed_iwarp_info *iwarp_info = &p_hwfn->p_rdma_info->iwarp;
@ -1902,6 +1922,16 @@ static int qed_iwarp_ll2_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
}
if (iwarp_info->ll2_mpa_handle != QED_IWARP_HANDLE_INVAL) {
rc = qed_ll2_terminate_connection(p_hwfn,
iwarp_info->ll2_mpa_handle);
if (rc)
DP_INFO(p_hwfn, "Failed to terminate mpa connection\n");
qed_ll2_release_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
}
qed_llh_remove_mac_filter(p_hwfn,
p_ptt, p_hwfn->p_rdma_info->iwarp.mac_addr);
return rc;
@ -1953,12 +1983,14 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
struct qed_iwarp_info *iwarp_info;
struct qed_ll2_acquire_data data;
struct qed_ll2_cbs cbs;
u32 mpa_buff_size;
u16 n_ooo_bufs;
int rc = 0;
iwarp_info = &p_hwfn->p_rdma_info->iwarp;
iwarp_info->ll2_syn_handle = QED_IWARP_HANDLE_INVAL;
iwarp_info->ll2_ooo_handle = QED_IWARP_HANDLE_INVAL;
iwarp_info->ll2_mpa_handle = QED_IWARP_HANDLE_INVAL;
iwarp_info->max_mtu = params->max_mtu;
@ -2029,6 +2061,39 @@ qed_iwarp_ll2_start(struct qed_hwfn *p_hwfn,
if (rc)
goto err;
/* Start Unaligned MPA connection */
cbs.rx_comp_cb = qed_iwarp_ll2_comp_mpa_pkt;
cbs.slowpath_cb = qed_iwarp_ll2_slowpath;
memset(&data, 0, sizeof(data));
data.input.conn_type = QED_LL2_TYPE_IWARP;
data.input.mtu = params->max_mtu;
/* FW requires that once a packet arrives OOO, it must have at
* least 2 rx buffers available on the unaligned connection
* for handling the case that it is a partial fpdu.
*/
data.input.rx_num_desc = n_ooo_bufs * 2;
data.input.tx_num_desc = data.input.rx_num_desc;
data.input.tx_max_bds_per_packet = QED_IWARP_MAX_BDS_PER_FPDU;
data.p_connection_handle = &iwarp_info->ll2_mpa_handle;
data.input.secondary_queue = true;
data.cbs = &cbs;
rc = qed_ll2_acquire_connection(p_hwfn, &data);
if (rc)
goto err;
rc = qed_ll2_establish_connection(p_hwfn, iwarp_info->ll2_mpa_handle);
if (rc)
goto err;
mpa_buff_size = QED_IWARP_MAX_BUF_SIZE(params->max_mtu);
rc = qed_iwarp_ll2_alloc_buffers(p_hwfn,
data.input.rx_num_desc,
mpa_buff_size,
iwarp_info->ll2_mpa_handle);
if (rc)
goto err;
return rc;
err:
qed_iwarp_ll2_stop(p_hwfn, p_ptt);

1
drivers/net/ethernet/qlogic/qed/qed_iwarp.h
View File

@ -73,6 +73,7 @@ struct qed_iwarp_info {
u8 tcp_flags;
u8 ll2_syn_handle;
u8 ll2_ooo_handle;
u8 ll2_mpa_handle;
u8 peer2peer;
enum mpa_negotiation_mode mpa_rev;
enum mpa_rtr_type rtr_type;