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>
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index 2825615..7780e97 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 @@
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)
{