From 2cfb4810a3f2c7f9b20c6def45ef8a4dbb730387 Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Thu, 27 Jun 2019 17:01:26 +0200 Subject: [PATCH] s390/qeth: dynamically allocate vnicc cmds The VNICC code is somewhat quirky in that it defers the whole cmd setup to a common helper qeth_l2_vnicc_request(). Some of the cmd specifics are then passed in via parameter, while others are simply hard-coded. Split the whole machinery up into the usual format: one helper that allocates the cmd & fills in the common fields, while all the cmd originators take care of their sub-cmd type specific work. This makes it much easier to calculate the cmd's precise length, and reduces code complexity. Signed-off-by: Julian Wiedmann Reviewed-by: Alexandra Winter Signed-off-by: David S. Miller --- drivers/s390/net/qeth_core_mpc.h | 13 ++-- drivers/s390/net/qeth_l2_main.c | 123 ++++++++++++++----------------- 2 files changed, 62 insertions(+), 74 deletions(-) diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h index 5cec877d972f..75b5834ed28d 100644 --- a/drivers/s390/net/qeth_core_mpc.h +++ b/drivers/s390/net/qeth_core_mpc.h @@ -630,12 +630,6 @@ struct qeth_ipacmd_diagass { /* VNICC header */ struct qeth_ipacmd_vnicc_hdr { - u32 sup; - u32 cur; -}; - -/* VNICC sub command header */ -struct qeth_vnicc_sub_hdr { u16 data_length; u16 reserved; u32 sub_command; @@ -660,15 +654,18 @@ struct qeth_vnicc_getset_timeout { /* complete VNICC IPA command message */ struct qeth_ipacmd_vnicc { + struct qeth_ipa_caps vnicc_cmds; struct qeth_ipacmd_vnicc_hdr hdr; - struct qeth_vnicc_sub_hdr sub_hdr; union { struct qeth_vnicc_query_cmds query_cmds; struct qeth_vnicc_set_char set_char; struct qeth_vnicc_getset_timeout getset_timeout; - }; + } data; }; +#define VNICC_DATA_SIZEOF(field) FIELD_SIZEOF(struct qeth_ipacmd_vnicc,\ + data.field) + /* SETBRIDGEPORT IPA Command: *********************************************/ enum qeth_ipa_sbp_cmd { IPA_SBP_QUERY_COMMANDS_SUPPORTED = 0x00000000L, diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index f762d22a3272..68c6f4080745 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1735,10 +1735,6 @@ static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc) /* generic VNICC request call back control */ struct _qeth_l2_vnicc_request_cbctl { u32 sub_cmd; - struct { - u32 vnic_char; - u32 timeout; - } param; struct { union{ u32 *sup_cmds; @@ -1761,80 +1757,52 @@ static int qeth_l2_vnicc_request_cb(struct qeth_card *card, if (cmd->hdr.return_code) return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code); /* return results to caller */ - card->options.vnicc.sup_chars = rep->hdr.sup; - card->options.vnicc.cur_chars = rep->hdr.cur; + card->options.vnicc.sup_chars = rep->vnicc_cmds.supported; + card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled; if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS) - *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds; + *cbctl->result.sup_cmds = rep->data.query_cmds.sup_cmds; if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT) - *cbctl->result.timeout = rep->getset_timeout.timeout; + *cbctl->result.timeout = rep->data.getset_timeout.timeout; return 0; } -/* generic VNICC request */ -static int qeth_l2_vnicc_request(struct qeth_card *card, - struct _qeth_l2_vnicc_request_cbctl *cbctl) +static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card, + u32 vnicc_cmd, + unsigned int data_length) { - struct qeth_ipacmd_vnicc *req; + struct qeth_ipacmd_vnicc_hdr *hdr; struct qeth_cmd_buffer *iob; - struct qeth_ipa_cmd *cmd; - QETH_CARD_TEXT(card, 2, "vniccreq"); - - /* get new buffer for request */ - iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0); + iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE, + data_length + + offsetof(struct qeth_ipacmd_vnicc, data)); if (!iob) - return -ENOMEM; + return NULL; - /* create header for request */ - cmd = __ipa_cmd(iob); - req = &cmd->data.vnicc; - - /* create sub command header for request */ - req->sub_hdr.data_length = sizeof(req->sub_hdr); - req->sub_hdr.sub_command = cbctl->sub_cmd; - - /* create sub command specific request fields */ - switch (cbctl->sub_cmd) { - case IPA_VNICC_QUERY_CHARS: - break; - case IPA_VNICC_QUERY_CMDS: - req->sub_hdr.data_length += sizeof(req->query_cmds); - req->query_cmds.vnic_char = cbctl->param.vnic_char; - break; - case IPA_VNICC_ENABLE: - case IPA_VNICC_DISABLE: - req->sub_hdr.data_length += sizeof(req->set_char); - req->set_char.vnic_char = cbctl->param.vnic_char; - break; - case IPA_VNICC_SET_TIMEOUT: - req->getset_timeout.timeout = cbctl->param.timeout; - /* fallthrough */ - case IPA_VNICC_GET_TIMEOUT: - req->sub_hdr.data_length += sizeof(req->getset_timeout); - req->getset_timeout.vnic_char = cbctl->param.vnic_char; - break; - default: - qeth_release_buffer(iob); - return -EOPNOTSUPP; - } - - /* send request */ - return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, cbctl); + hdr = &__ipa_cmd(iob)->data.vnicc.hdr; + hdr->data_length = sizeof(*hdr) + data_length; + hdr->sub_command = vnicc_cmd; + return iob; } /* VNICC query VNIC characteristics request */ static int qeth_l2_vnicc_query_chars(struct qeth_card *card) { struct _qeth_l2_vnicc_request_cbctl cbctl; + struct qeth_cmd_buffer *iob; + + QETH_CARD_TEXT(card, 2, "vniccqch"); + iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0); + if (!iob) + return -ENOMEM; /* prepare callback control */ cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS; - QETH_CARD_TEXT(card, 2, "vniccqch"); - return qeth_l2_vnicc_request(card, &cbctl); + return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, &cbctl); } /* VNICC query sub commands request */ @@ -1842,14 +1810,21 @@ static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char, u32 *sup_cmds) { struct _qeth_l2_vnicc_request_cbctl cbctl; + struct qeth_cmd_buffer *iob; + + QETH_CARD_TEXT(card, 2, "vniccqcm"); + iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS, + VNICC_DATA_SIZEOF(query_cmds)); + if (!iob) + return -ENOMEM; + + __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char; /* prepare callback control */ cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS; - cbctl.param.vnic_char = vnic_char; cbctl.result.sup_cmds = sup_cmds; - QETH_CARD_TEXT(card, 2, "vniccqcm"); - return qeth_l2_vnicc_request(card, &cbctl); + return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, &cbctl); } /* VNICC enable/disable characteristic request */ @@ -1857,31 +1832,47 @@ static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char, u32 cmd) { struct _qeth_l2_vnicc_request_cbctl cbctl; + struct qeth_cmd_buffer *iob; + + QETH_CARD_TEXT(card, 2, "vniccedc"); + iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char)); + if (!iob) + return -ENOMEM; + + __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char; /* prepare callback control */ cbctl.sub_cmd = cmd; - cbctl.param.vnic_char = vnic_char; - QETH_CARD_TEXT(card, 2, "vniccedc"); - return qeth_l2_vnicc_request(card, &cbctl); + return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, &cbctl); } /* VNICC get/set timeout for characteristic request */ static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc, u32 cmd, u32 *timeout) { + struct qeth_vnicc_getset_timeout *getset_timeout; struct _qeth_l2_vnicc_request_cbctl cbctl; + struct qeth_cmd_buffer *iob; + + QETH_CARD_TEXT(card, 2, "vniccgst"); + iob = qeth_l2_vnicc_build_cmd(card, cmd, + VNICC_DATA_SIZEOF(getset_timeout)); + if (!iob) + return -ENOMEM; + + getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout; + getset_timeout->vnic_char = vnicc; + + if (cmd == IPA_VNICC_SET_TIMEOUT) + getset_timeout->timeout = *timeout; /* prepare callback control */ cbctl.sub_cmd = cmd; - cbctl.param.vnic_char = vnicc; - if (cmd == IPA_VNICC_SET_TIMEOUT) - cbctl.param.timeout = *timeout; if (cmd == IPA_VNICC_GET_TIMEOUT) cbctl.result.timeout = timeout; - QETH_CARD_TEXT(card, 2, "vniccgst"); - return qeth_l2_vnicc_request(card, &cbctl); + return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, &cbctl); } /* set current VNICC flag state; called from sysfs store function */