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RDMA/core: Add local DMA L_Key support

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- Change the IB_DEVICE_ZERO_STAG flag to the transport-neutral name
  IB_DEVICE_LOCAL_DMA_LKEY, which is used by iWARP RNICs to indicate 0
  STag support and IB HCAs to indicate reserved L_Key support.

- Add a u32 local_dma_lkey member to struct ib_device.  Drivers fill
  this in with the appropriate local DMA L_Key (if they support it).

- Fix up the drivers using this flag.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Steve Wise 2008-07-14 23:48:53 -07:00 committed by Roland Dreier
parent aed012279d
commit 96f15c0353
4 changed files with 8 additions and 5 deletions
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2
drivers/infiniband/hw/amso1100/c2_rnic.c
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@ -454,7 +454,7 @@ int __devinit c2_rnic_init(struct c2_dev *c2dev)
(IB_DEVICE_RESIZE_MAX_WR |
IB_DEVICE_CURR_QP_STATE_MOD |
IB_DEVICE_SYS_IMAGE_GUID |
IB_DEVICE_ZERO_STAG |
IB_DEVICE_LOCAL_DMA_LKEY |
IB_DEVICE_MEM_WINDOW);
/* Allocate the qptr_array */

6
drivers/infiniband/hw/cxgb3/iwch_provider.c
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@ -1325,8 +1325,10 @@ int iwch_register_device(struct iwch_dev *dev)
memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
memcpy(&dev->ibdev.node_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
dev->ibdev.owner = THIS_MODULE;
dev->device_cap_flags = IB_DEVICE_ZERO_STAG |
IB_DEVICE_MEM_WINDOW;
dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
/* cxgb3 supports STag 0. */
dev->ibdev.local_dma_lkey = 0;
if (fw_supports_fastreg(dev))
dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;

2
drivers/infiniband/hw/nes/nes_hw.c
View File

@ -398,7 +398,7 @@ struct nes_adapter *nes_init_adapter(struct nes_device *nesdev, u8 hw_rev) {
nesadapter->base_pd = 1;
nesadapter->device_cap_flags =
IB_DEVICE_ZERO_STAG | IB_DEVICE_MEM_WINDOW;
IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
nesadapter->allocated_qps = (unsigned long *)&(((unsigned char *)nesadapter)
[(sizeof(struct nes_adapter)+(sizeof(unsigned long)-1))&(~(sizeof(unsigned long)-1))]);

3
include/rdma/ib_verbs.h
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@ -91,7 +91,7 @@ enum ib_device_cap_flags {
IB_DEVICE_RC_RNR_NAK_GEN = (1<<12),
IB_DEVICE_SRQ_RESIZE = (1<<13),
IB_DEVICE_N_NOTIFY_CQ = (1<<14),
IB_DEVICE_ZERO_STAG = (1<<15),
IB_DEVICE_LOCAL_DMA_LKEY = (1<<15),
IB_DEVICE_RESERVED = (1<<16), /* old SEND_W_INV */
IB_DEVICE_MEM_WINDOW = (1<<17),
/*
@ -1149,6 +1149,7 @@ struct ib_device {
char node_desc[64];
__be64 node_guid;
u32 local_dma_lkey;
u8 node_type;
u8 phys_port_cnt;
};