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authorJulian Wiedmann <jwi@linux.ibm.com>2019-06-27 18:01:27 +0300
committerDavid S. Miller <davem@davemloft.net>2019-06-27 20:18:23 +0300
commitf19f8fd2df7c5929313984a5d83e9fb280bfd75f (patch)
tree29bbc16b841e886a6a8a5f4304993f082222bdde /drivers/s390/net
parent2cfb4810a3f2c7f9b20c6def45ef8a4dbb730387 (diff)
downloadlinux-f19f8fd2df7c5929313984a5d83e9fb280bfd75f.tar.xz
s390/qeth: dynamically allocate MPC cmds
The base MPC cmds are the last remaining user of the static cmd buffers. Port them over to use dynamic allocation, and stop backing the write channel's cmd buffers with pages. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
-rw-r--r--drivers/s390/net/qeth_core_main.c36
1 files changed, 19 insertions, 17 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 22074890835e..b4c200eec707 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1454,7 +1454,7 @@ static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
goto out_read_cmd;
if (qeth_setup_channel(&card->read, false))
goto out_read;
- if (qeth_setup_channel(&card->write, true))
+ if (qeth_setup_channel(&card->write, false))
goto out_write;
if (qeth_setup_channel(&card->data, false))
goto out_data;
@@ -1737,8 +1737,6 @@ static void qeth_mpc_finalize_cmd(struct qeth_card *card,
struct qeth_cmd_buffer *iob,
unsigned int length)
{
- qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, length,
- iob->data);
qeth_idx_finalize_cmd(card, iob, length);
memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
@@ -1751,13 +1749,20 @@ static void qeth_mpc_finalize_cmd(struct qeth_card *card,
iob->callback = qeth_release_buffer_cb;
}
-static struct qeth_cmd_buffer *qeth_mpc_get_cmd_buffer(struct qeth_card *card)
+static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
+ void *data,
+ unsigned int data_length)
{
struct qeth_cmd_buffer *iob;
- iob = qeth_get_buffer(&card->write);
- if (iob)
- iob->finalize = qeth_mpc_finalize_cmd;
+ iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
+ if (!iob)
+ return NULL;
+
+ memcpy(iob->data, data, data_length);
+ qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
+ iob->data);
+ iob->finalize = qeth_mpc_finalize_cmd;
return iob;
}
@@ -2080,11 +2085,10 @@ static int qeth_cm_enable(struct qeth_card *card)
QETH_CARD_TEXT(card, 2, "cmenable");
- iob = qeth_mpc_get_cmd_buffer(card);
+ iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
if (!iob)
return -ENOMEM;
- 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),
@@ -2116,11 +2120,10 @@ static int qeth_cm_setup(struct qeth_card *card)
QETH_CARD_TEXT(card, 2, "cmsetup");
- iob = qeth_mpc_get_cmd_buffer(card);
+ iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
if (!iob)
return -ENOMEM;
- 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),
@@ -2235,11 +2238,10 @@ static int qeth_ulp_enable(struct qeth_card *card)
QETH_CARD_TEXT(card, 2, "ulpenabl");
- iob = qeth_mpc_get_cmd_buffer(card);
+ iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
if (!iob)
return -ENOMEM;
- memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
*(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
@@ -2283,11 +2285,10 @@ static int qeth_ulp_setup(struct qeth_card *card)
QETH_CARD_TEXT(card, 2, "ulpsetup");
- iob = qeth_mpc_get_cmd_buffer(card);
+ iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
if (!iob)
return -ENOMEM;
- memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
&card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
@@ -2473,11 +2474,10 @@ static int qeth_dm_act(struct qeth_card *card)
QETH_CARD_TEXT(card, 2, "dmact");
- iob = qeth_mpc_get_cmd_buffer(card);
+ iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
if (!iob)
return -ENOMEM;
- memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
&card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
@@ -2770,6 +2770,8 @@ void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
u16 total_length = IPA_PDU_HEADER_SIZE + cmd_length;
u8 prot_type = qeth_mpc_select_prot_type(card);
+ qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
+ iob->data);
iob->finalize = qeth_ipa_finalize_cmd;
iob->timeout = QETH_IPA_TIMEOUT;