diff options
| author | Roland Dreier <rolandd@cisco.com> | 2006-01-30 14:31:33 -0800 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-03-20 10:08:08 -0800 |
| commit | 4885bf64bc2eb242ebebe67077cfe3688283b586 (patch) | |
| tree | ed40e3eb7c05e923919f1e8ef2a9186b32c916a4 /drivers/infiniband/hw/mthca/mthca_cmd.c | |
| parent | 33b9b3ee9709b19c4f02ab91571d53540d05c3d1 (diff) | |
| download | lwn-4885bf64bc2eb242ebebe67077cfe3688283b586.tar.gz lwn-4885bf64bc2eb242ebebe67077cfe3688283b586.zip | |
IB/mthca: Add device-specific support for resizing CQs
Add low-level driver support for resizing CQs (both kernel and
userspace) to mthca.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_cmd.c')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_cmd.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c index 2825615ce81c..7780e974cfb5 100644 --- a/drivers/infiniband/hw/mthca/mthca_cmd.c +++ b/drivers/infiniband/hw/mthca/mthca_cmd.c @@ -1,7 +1,7 @@ /* * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. * Copyright (c) 2005 Mellanox Technologies. All rights reserved. - * Copyright (c) 2005 Cisco Systems. All rights reserved. + * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU @@ -1514,6 +1514,37 @@ int mthca_HW2SW_CQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, CMD_TIME_CLASS_A, status); } +int mthca_RESIZE_CQ(struct mthca_dev *dev, int cq_num, u32 lkey, u8 log_size, + u8 *status) +{ + struct mthca_mailbox *mailbox; + __be32 *inbox; + int err; + +#define RESIZE_CQ_IN_SIZE 0x40 +#define RESIZE_CQ_LOG_SIZE_OFFSET 0x0c +#define RESIZE_CQ_LKEY_OFFSET 0x1c + + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + inbox = mailbox->buf; + + memset(inbox, 0, RESIZE_CQ_IN_SIZE); + /* + * Leave start address fields zeroed out -- mthca assumes that + * MRs for CQs always start at virtual address 0. + */ + MTHCA_PUT(inbox, log_size, RESIZE_CQ_LOG_SIZE_OFFSET); + MTHCA_PUT(inbox, lkey, RESIZE_CQ_LKEY_OFFSET); + + err = mthca_cmd(dev, mailbox->dma, cq_num, 1, CMD_RESIZE_CQ, + CMD_TIME_CLASS_B, status); + + mthca_free_mailbox(dev, mailbox); + return err; +} + int mthca_SW2HW_SRQ(struct mthca_dev *dev, struct mthca_mailbox *mailbox, int srq_num, u8 *status) { |