diff options
author | Julian Wiedmann <jwi@linux.ibm.com> | 2019-02-12 20:33:17 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-02-12 21:14:24 +0300 |
commit | c21532771e9f965a609d4280bade7139b1452273 (patch) | |
tree | 4ecdbc9d42769a3c92e4d851d5cfe21bce7db39c /drivers | |
parent | 84dbea461e490d7bba3706637efd7835eb3c8205 (diff) | |
download | linux-c21532771e9f965a609d4280bade7139b1452273.tar.xz |
s390/qeth: consolidate filling of low-level cmd length fields
The code to fill the IPA length fields is duplicated three times across
the driver:
1. qeth_send_ipa_cmd() sets IPA_CMD_LENGTH, which matches the defaults
in the IPA_PDU_HEADER template.
2. for OSN, qeth_osn_send_ipa_cmd() bypasses this logic and inserts the
length passed by the caller.
3. SNMP commands (that can outgrow IPA_CMD_LENGTH) have their own way
of setting the length fields, via qeth_send_ipa_snmp_cmd().
Consolidate this into qeth_prepare_ipa_cmd(), which all originators of
IPA cmds already call during setup of their cmd. Let qeth_send_ipa_cmd()
pull the length from the cmd instead of hard-coding IPA_CMD_LENGTH.
For now, the SNMP code still needs to fix-up its length fields manually.
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 | 3 | ||||
-rw-r--r-- | drivers/s390/net/qeth_core_main.c | 43 | ||||
-rw-r--r-- | drivers/s390/net/qeth_core_mpc.c | 19 | ||||
-rw-r--r-- | drivers/s390/net/qeth_core_mpc.h | 2 | ||||
-rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 17 |
5 files changed, 28 insertions, 56 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index f35e0b58ba4e..07840f9c0bb3 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -1000,7 +1000,8 @@ 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); +void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, + u16 cmd_length); struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *); int qeth_query_switch_attributes(struct qeth_card *card, struct qeth_switch_info *sw_info); diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 47927613d43c..5f450df886c6 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -2815,14 +2815,20 @@ static void qeth_fill_ipacmd_header(struct qeth_card *card, cmd->hdr.prot_version = prot; } -void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob) +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); memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE); + memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2); memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1); + memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2); + memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2); memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data), &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH); + memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2); } EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd); @@ -2833,7 +2839,7 @@ struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card, iob = qeth_get_buffer(&card->write); if (iob) { - qeth_prepare_ipa_cmd(card, iob); + qeth_prepare_ipa_cmd(card, iob, sizeof(struct qeth_ipa_cmd)); qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot); } else { dev_warn(&card->gdev->dev, @@ -2857,11 +2863,12 @@ int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, unsigned long), void *reply_param) { + u16 length; int rc; QETH_CARD_TEXT(card, 4, "sendipa"); - rc = qeth_send_control_data(card, IPA_CMD_LENGTH, - iob, reply_cb, reply_param); + memcpy(&length, QETH_IPA_PDU_LEN_TOTAL(iob->data), 2); + rc = qeth_send_control_data(card, length, iob, reply_cb, reply_param); if (rc == -ETIME) { qeth_clear_ipacmd_list(card); qeth_schedule_recovery(card); @@ -4460,27 +4467,6 @@ static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum) return rc; } -static int qeth_send_ipa_snmp_cmd(struct qeth_card *card, - struct qeth_cmd_buffer *iob, int len, - int (*reply_cb)(struct qeth_card *, struct qeth_reply *, - unsigned long), - void *reply_param) -{ - u16 s1, s2; - - QETH_CARD_TEXT(card, 4, "sendsnmp"); - - /* adjust PDU length fields in IPA_PDU_HEADER */ - s1 = (u32) IPA_PDU_HEADER_SIZE + len; - s2 = (u32) len; - memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2); - memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2); - memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2); - memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2); - return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob, - reply_cb, reply_param); -} - static int qeth_snmp_command_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long sdata) { @@ -4586,10 +4572,13 @@ static int qeth_snmp_command(struct qeth_card *card, char __user *udata) rc = -ENOMEM; goto out; } + + /* for large requests, fix-up the length fields: */ + qeth_prepare_ipa_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len); + cmd = __ipa_cmd(iob); memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len); - rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len, - qeth_snmp_command_cb, (void *)&qinfo); + rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo); if (rc) QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n", CARD_DEVID(card), rc); diff --git a/drivers/s390/net/qeth_core_mpc.c b/drivers/s390/net/qeth_core_mpc.c index 16fc51ad0514..7ff221ae0a2e 100644 --- a/drivers/s390/net/qeth_core_mpc.c +++ b/drivers/s390/net/qeth_core_mpc.c @@ -125,24 +125,13 @@ unsigned char DM_ACT[] = { unsigned char IPA_PDU_HEADER[] = { 0x00, 0xe0, 0x00, 0x00, 0x77, 0x77, 0x77, 0x77, - 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, - (IPA_PDU_HEADER_SIZE+sizeof(struct qeth_ipa_cmd)) / 256, - (IPA_PDU_HEADER_SIZE+sizeof(struct qeth_ipa_cmd)) % 256, + 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0xc1, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, - sizeof(struct qeth_ipa_cmd) / 256, - sizeof(struct qeth_ipa_cmd) % 256, - 0x00, - sizeof(struct qeth_ipa_cmd) / 256, - sizeof(struct qeth_ipa_cmd) % 256, - 0x05, - 0x77, 0x77, 0x77, 0x77, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x05, 0x77, 0x77, 0x77, 0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x01, 0x00, - sizeof(struct qeth_ipa_cmd) / 256, - sizeof(struct qeth_ipa_cmd) % 256, - 0x00, 0x00, 0x00, 0x40, + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, }; struct ipa_rc_msg { diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h index 07a48ee95dba..1ac88da91a40 100644 --- a/drivers/s390/net/qeth_core_mpc.h +++ b/drivers/s390/net/qeth_core_mpc.h @@ -21,8 +21,6 @@ extern unsigned char IPA_PDU_HEADER[]; #define QETH_IPA_CMD_DEST_ADDR(buffer) (buffer + 0x2c) -#define IPA_CMD_LENGTH (IPA_PDU_HEADER_SIZE + sizeof(struct qeth_ipa_cmd)) - #define QETH_SEQ_NO_LENGTH 4 #define QETH_MPC_TOKEN_LENGTH 4 #define QETH_MCL_LENGTH 4 diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index ef0b5eaf2532..453b3f7f272c 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1124,20 +1124,14 @@ static int qeth_osn_send_control_data(struct qeth_card *card, int len, } static int qeth_osn_send_ipa_cmd(struct qeth_card *card, - struct qeth_cmd_buffer *iob, int data_len) + struct qeth_cmd_buffer *iob) { - u16 s1, s2; + u16 length; QETH_CARD_TEXT(card, 4, "osndipa"); - qeth_prepare_ipa_cmd(card, iob); - s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len); - s2 = (u16)data_len; - memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2); - memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2); - memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2); - memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2); - return qeth_osn_send_control_data(card, s1, iob); + memcpy(&length, QETH_IPA_PDU_LEN_TOTAL(iob->data), 2); + return qeth_osn_send_control_data(card, length, iob); } int qeth_osn_assist(struct net_device *dev, void *data, int data_len) @@ -1154,8 +1148,9 @@ int qeth_osn_assist(struct net_device *dev, void *data, int data_len) if (!qeth_card_hw_is_reachable(card)) return -ENODEV; iob = qeth_wait_for_buffer(&card->write); + qeth_prepare_ipa_cmd(card, iob, (u16) data_len); memcpy(__ipa_cmd(iob), data, data_len); - return qeth_osn_send_ipa_cmd(card, iob, data_len); + return qeth_osn_send_ipa_cmd(card, iob); } EXPORT_SYMBOL(qeth_osn_assist); |