diff options
author | Julian Wiedmann <jwi@linux.ibm.com> | 2019-03-28 16:39:27 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-03-28 20:57:24 +0100 |
commit | 48ce6f89fcb10fa73622c71e455645a9d59a1aa2 (patch) | |
tree | 3898fbc3bd090c020fbf727ada8b902888a8efbd /drivers | |
parent | s390/qeth: let qeth_notify_reply() set the notify reason (diff) | |
download | linux-48ce6f89fcb10fa73622c71e455645a9d59a1aa2.tar.xz linux-48ce6f89fcb10fa73622c71e455645a9d59a1aa2.zip |
s390/qeth: use callback to finalize cmd
To avoid concurrency issues, some parts of the cmd setup are delayed
until qeth_send_control_data() holds the IO channel's irq_pending
"lock". Rather than hard-coding those setup steps for each cmd type,
have the cmd provide a callback. This will make it easier to also issue
IDX commands via qeth_send_control_data().
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/s390/net/qeth_core.h | 4 | ||||
-rw-r--r-- | drivers/s390/net/qeth_core_main.c | 74 | ||||
-rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 3 |
3 files changed, 50 insertions, 31 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index 30772d4abcbc..9495ba74404d 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -589,6 +589,8 @@ struct qeth_cmd_buffer { struct qeth_reply *reply; long timeout; unsigned char *data; + void (*finalize)(struct qeth_card *card, struct qeth_cmd_buffer *iob, + unsigned int length); void (*callback)(struct qeth_card *card, struct qeth_channel *channel, struct qeth_cmd_buffer *iob); }; @@ -991,8 +993,6 @@ void qeth_clear_qdio_buffers(struct qeth_card *); void qeth_setadp_promisc_mode(struct qeth_card *); int qeth_setadpparms_change_macaddr(struct qeth_card *); void qeth_tx_timeout(struct net_device *); -void qeth_prepare_control_data(struct qeth_card *, int, - struct qeth_cmd_buffer *); void qeth_release_buffer(struct qeth_channel *, struct qeth_cmd_buffer *); void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, u16 cmd_length); diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index fee787fbc1d4..431929d83f70 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1807,6 +1807,18 @@ static int qeth_idx_activate_get_answer(struct qeth_card *card, return rc; } +static void qeth_idx_finalize_cmd(struct qeth_card *card, + struct qeth_cmd_buffer *iob, + unsigned int length) +{ + qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, length, iob->data); + + memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr, + QETH_SEQ_NO_LENGTH); + if (iob->channel == &card->write) + card->seqno.trans_hdr++; +} + static int qeth_idx_activate_channel(struct qeth_card *card, struct qeth_channel *channel, void (*reply_cb)(struct qeth_card *, @@ -1825,18 +1837,12 @@ static int qeth_idx_activate_channel(struct qeth_card *card, if (!iob) return -ENOMEM; iob->callback = reply_cb; - qeth_setup_ccw(channel->ccw, CCW_CMD_WRITE, IDX_ACTIVATE_SIZE, - iob->data); - if (channel == &card->write) { + + if (channel == &card->write) memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE); - memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), - &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH); - card->seqno.trans_hdr++; - } else { + else memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE); - memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), - &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH); - } + tmp = ((u8)card->dev->dev_port) | 0x80; memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1); memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data), @@ -1850,6 +1856,8 @@ static int qeth_idx_activate_channel(struct qeth_card *card, wait_event(card->wait_q, qeth_trylock_channel(channel)); QETH_DBF_TEXT(SETUP, 6, "noirqpnd"); + qeth_idx_finalize_cmd(card, iob, IDX_ACTIVATE_SIZE); + spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw, (addr_t) iob, 0, 0, QETH_TIMEOUT); @@ -1977,23 +1985,21 @@ out: qeth_release_buffer(channel, iob); } -void qeth_prepare_control_data(struct qeth_card *card, int len, - struct qeth_cmd_buffer *iob) +static void qeth_mpc_finalize_cmd(struct qeth_card *card, + struct qeth_cmd_buffer *iob, + unsigned int length) { - qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, len, iob->data); - iob->callback = qeth_release_buffer_cb; + qeth_idx_finalize_cmd(card, iob, length); - memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), - &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH); - card->seqno.trans_hdr++; memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data), &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH); card->seqno.pdu_hdr++; memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data), &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH); - QETH_DBF_HEX(CTRL, 2, iob->data, min(len, QETH_DBF_CTRL_LEN)); + + iob->reply->seqno = QETH_IDX_COMMAND_SEQNO; + iob->callback = qeth_release_buffer_cb; } -EXPORT_SYMBOL_GPL(qeth_prepare_control_data); /** * qeth_send_control_data() - send control command to the card @@ -2029,7 +2035,6 @@ static int qeth_send_control_data(struct qeth_card *card, int len, long timeout = iob->timeout; int rc; struct qeth_reply *reply = NULL; - struct qeth_ipa_cmd *cmd = NULL; QETH_CARD_TEXT(card, 2, "sendctl"); @@ -2058,14 +2063,8 @@ static int qeth_send_control_data(struct qeth_card *card, int len, return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME; } - if (IS_IPA(iob->data)) { - cmd = __ipa_cmd(iob); - cmd->hdr.seqno = card->seqno.ipa++; - reply->seqno = cmd->hdr.seqno; - } else { - reply->seqno = QETH_IDX_COMMAND_SEQNO; - } - qeth_prepare_control_data(card, len, iob); + iob->finalize(card, iob, len); + QETH_DBF_HEX(CTRL, 2, iob->data, min(len, QETH_DBF_CTRL_LEN)); qeth_enqueue_reply(card, reply); @@ -2120,7 +2119,9 @@ static int qeth_cm_enable(struct qeth_card *card) QETH_DBF_TEXT(SETUP, 2, "cmenable"); iob = qeth_wait_for_buffer(&card->write); + iob->finalize = qeth_mpc_finalize_cmd; memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE); + memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data), &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data), @@ -2153,7 +2154,9 @@ static int qeth_cm_setup(struct qeth_card *card) QETH_DBF_TEXT(SETUP, 2, "cmsetup"); iob = qeth_wait_for_buffer(&card->write); + iob->finalize = qeth_mpc_finalize_cmd; memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE); + memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data), &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data), @@ -2270,6 +2273,7 @@ static int qeth_ulp_enable(struct qeth_card *card) QETH_DBF_TEXT(SETUP, 2, "ulpenabl"); iob = qeth_wait_for_buffer(&card->write); + iob->finalize = qeth_mpc_finalize_cmd; memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE); *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port; @@ -2316,6 +2320,7 @@ static int qeth_ulp_setup(struct qeth_card *card) QETH_DBF_TEXT(SETUP, 2, "ulpsetup"); iob = qeth_wait_for_buffer(&card->write); + iob->finalize = qeth_mpc_finalize_cmd; memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE); memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data), @@ -2503,6 +2508,7 @@ static int qeth_dm_act(struct qeth_card *card) QETH_DBF_TEXT(SETUP, 2, "dmact"); iob = qeth_wait_for_buffer(&card->write); + iob->finalize = qeth_mpc_finalize_cmd; memcpy(iob->data, DM_ACT, DM_ACT_SIZE); memcpy(QETH_DM_ACT_DEST_ADDR(iob->data), @@ -2785,12 +2791,24 @@ static void qeth_fill_ipacmd_header(struct qeth_card *card, cmd->hdr.prot_version = prot; } +static void qeth_ipa_finalize_cmd(struct qeth_card *card, + struct qeth_cmd_buffer *iob, + unsigned int length) +{ + qeth_mpc_finalize_cmd(card, iob, length); + + /* override with IPA-specific values: */ + __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa; + iob->reply->seqno = card->seqno.ipa++; +} + void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, u16 cmd_length) { u16 total_length = IPA_PDU_HEADER_SIZE + cmd_length; u8 prot_type = qeth_mpc_select_prot_type(card); + iob->finalize = qeth_ipa_finalize_cmd; iob->timeout = QETH_IPA_TIMEOUT; memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE); diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index e2b09472c482..5549c66c6b5d 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1051,7 +1051,8 @@ static int qeth_osn_send_control_data(struct qeth_card *card, int len, QETH_CARD_TEXT(card, 5, "osndctrd"); wait_event(card->wait_q, qeth_trylock_channel(channel)); - qeth_prepare_control_data(card, len, iob); + iob->finalize(card, iob, len); + QETH_DBF_HEX(CTRL, 2, iob->data, min(len, QETH_DBF_CTRL_LEN)); QETH_CARD_TEXT(card, 6, "osnoirqp"); spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw, |