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  1. 15 7月, 2008 16 次提交
    • S
      RDMA/cxgb3: MEM_MGT_EXTENSIONS support · e7e55829
      由 Steve Wise 提交于 
      - set IB_DEVICE_MEM_MGT_EXTENSIONS capability bit if fw supports it.
- set max_fast_reg_page_list_len device attribute.
- add iwch_alloc_fast_reg_mr function.
- add iwch_alloc_fastreg_pbl
- add iwch_free_fastreg_pbl
- adjust the WQ depth for kernel mode work queues to account for
  fastreg possibly taking 2 WR slots.
- add fastreg_mr work request support.
- add local_inv work request support.
- add send_with_inv and send_with_se_inv work request support.
- removed useless duplicate enums/defines for TPT/MW/MR stuff.
Signed-off-by: NSteve Wise <swise@opengridcomputing.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      e7e55829
    • S
      RDMA/core: Add memory management extensions support · 00f7ec36
      由 Steve Wise 提交于 
      This patch adds support for the IB "base memory management extension"
(BMME) and the equivalent iWARP operations (which the iWARP verbs
mandates all devices must implement).  The new operations are:

 - Allocate an ib_mr for use in fast register work requests.

 - Allocate/free a physical buffer lists for use in fast register work
   requests.  This allows device drivers to allocate this memory as
   needed for use in posting send requests (eg via dma_alloc_coherent).

 - New send queue work requests:
   * send with remote invalidate
   * fast register memory region
   * local invalidate memory region
   * RDMA read with invalidate local memory region (iWARP only)

Consumer interface details:

 - A new device capability flag IB_DEVICE_MEM_MGT_EXTENSIONS is added
   to indicate device support for these features.

 - New send work request opcodes IB_WR_FAST_REG_MR, IB_WR_LOCAL_INV,
   IB_WR_RDMA_READ_WITH_INV are added.

 - A new consumer API function, ib_alloc_mr() is added to allocate
   fast register memory regions.

 - New consumer API functions, ib_alloc_fast_reg_page_list() and
   ib_free_fast_reg_page_list() are added to allocate and free
   device-specific memory for fast registration page lists.

 - A new consumer API function, ib_update_fast_reg_key(), is added to
   allow the key portion of the R_Key and L_Key of a fast registration
   MR to be updated.  Consumers call this if desired before posting
   a IB_WR_FAST_REG_MR work request.

Consumers can use this as follows:

 - MR is allocated with ib_alloc_mr().

 - Page list memory is allocated with ib_alloc_fast_reg_page_list().

 - MR R_Key/L_Key "key" field is updated with ib_update_fast_reg_key().

 - MR made VALID and bound to a specific page list via
   ib_post_send(IB_WR_FAST_REG_MR)

 - MR made INVALID via ib_post_send(IB_WR_LOCAL_INV),
   ib_post_send(IB_WR_RDMA_READ_WITH_INV) or an incoming send with
   invalidate operation.

 - MR is deallocated with ib_dereg_mr()

 - page lists dealloced via ib_free_fast_reg_page_list().

Applications can allocate a fast register MR once, and then can
repeatedly bind the MR to different physical block lists (PBLs) via
posting work requests to a send queue (SQ).  For each outstanding
MR-to-PBL binding in the SQ pipe, a fast_reg_page_list needs to be
allocated (the fast_reg_page_list is owned by the low-level driver
from the consumer posting a work request until the request completes).
Thus pipelining can be achieved while still allowing device-specific
page_list processing.

The 32-bit fast register memory key/STag is composed of a 24-bit index
and an 8-bit key.  The application can change the key each time it
fast registers thus allowing more control over the peer's use of the
key/STag (ie it can effectively be changed each time the rkey is
rebound to a page list).
Signed-off-by: NSteve Wise <swise@opengridcomputing.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      00f7ec36
    • E
      IPoIB: Copy small received SKBs in connected mode · f89271da
      由 Eli Cohen 提交于 
      The connected mode implementation in the IPoIB driver has a large
overhead in the way SKBs are handled in the receive flow.  It usually
allocates an SKB with as big as was used in the currently received SKB
and moves unused fragments from the old SKB to the new one. This
involves a loop on all the remaining fragments and incurs overhead on
the CPU.  This patch, for small SKBs, allocates an SKB just large
enough to contain the received data and copies to it the data from the
received SKB.  The newly allocated SKB is passed to the stack and the
old SKB is reposted.

When running netperf, UDP small messages, without this pach I get:

    UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
    14.4.3.178 (14.4.3.178) port 0 AF_INET
    Socket  Message  Elapsed      Messages
    Size    Size     Time         Okay Errors   Throughput
    bytes   bytes    secs            #      #   10^6bits/sec

    114688     128   10.00     5142034      0     526.31
    114688           10.00     1130489            115.71

With this patch I get both send and receive at ~315 mbps.

The reason that send performance actually slows down is as follows:
When using this patch, the overhead of the CPU for handling RX packets
is dramatically reduced.  As a result, we do not experience RNR NAK
messages from the receiver which cause the connection to be closed and
reopened again; when the patch is not used, the receiver cannot handle
the packets fast enough so there is less time to post new buffers and
hence the mentioned RNR NACKs.  So what happens is that the
application *thinks* it posted a certain number of packets for
transmission but these packets are flushed and do not really get
transmitted.  Since the connection gets opened and closed many times,
each time netperf gets the CPU time that otherwise would have been
given to IPoIB to actually transmit the packets.  This can be verified
when looking at the port counters -- the output of ifconfig and the
oputput of netperf (this is for the case without the patch):

    tx packets
    ==========
    port counter:   1,543,996
    ifconfig:       1,581,426
    netperf:        5,142,034

    rx packets
    ==========
    netperf         1,1304,089
Signed-off-by: NEli Cohen <eli@mellanox.co.il>
      f89271da
    • R
      RDMA: Remove subversion $Id tags · f3781d2e
      由 Roland Dreier 提交于 
      They don't get updated by git and so they're worse than useless.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      f3781d2e
    • R
      IB/ipath: Simplify code using ARRAY_SIZE() macro · fd91b1bf
      由 Robert P. J. Day 提交于 
      Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      fd91b1bf
    • E
      IB/mlx4: Optimize QP stamping · 9670e553
      由 Eli Cohen 提交于 
      The idea is that for QPs with fixed size work requests (eg selective
signaling QPs), before stamping the WQE, we read the value of the DS
field, which gives the effective size of the descriptor as used in the
previous post.  Then we stamp only that area, since the rest of the
descriptor is already stamped.

When initializing the send queue buffer, make sure the DS field is
initialized to the max descriptor size so that the subsequent stamping
will be done on the entire descriptor area.
Signed-off-by: NEli Cohen <eli@mellanox.co.il>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      9670e553
    • M
      IB/sa: Fail requests made while creating new SM AH · 164ba089
      由 Moni Shoua 提交于 
      This patch solves a race that occurs after an event occurs that causes
the SA query module to flush its SM address handle (AH).  When SM AH
becomes invalid and needs an update it is handled by the global
workqueue.  On the other hand this event is also handled in the IPoIB
driver by queuing work in the ipoib_workqueue that does multicast
joins.  Although queuing is in the right order, it is done to 2
different workqueues and so there is no guarantee that the first to be
queued is the first to be executed.

This causes a problem because IPoIB may end up sending an request to
the old SM, which will take a long time to time out (since the old SM
is gone); this leads to a much longer than necessary interruption in
multicast traffer.

The patch sets the SA query module's SM AH to NULL when the event
occurs, and until update_sm_ah() is done, any request that needs sm_ah
fails with -EAGAIN return status.

For consumers, the patch doesn't make things worse.  Before the patch,
MADs are sent to the wrong SM so the request gets lost.  Consumers can
be improved if they examine the return code and respond to EAGAIN
properly but even without an improvement the situation is not getting
worse.
Signed-off-by: NMoni Levy <monil@voltaire.com>
Signed-off-by: NMoni Shoua <monis@voltaire.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      164ba089
    • S
      RDMA: Fix license text · a9474917
      由 Sean Hefty 提交于 
      The license text for several files references a third software license
that was inadvertently copied in.  Update the license to what was
intended.  This update was based on a request from HP.
Signed-off-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      a9474917
    • C
      RDMA/nes: Remove unnecessary memset() · 929555a2
      由 Christophe Jaillet 提交于 
      Remove an explicit memset(..., 0, ...) of a 'listener' structure
allocated with kzalloc().
Signed-off-by: NChristophe Jaillet <christophe.jaillet@wanadoo.fr>
Acked-by: NFaisal Latif <faisal@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      929555a2
    • R
      IB/srp: Remove use of cached P_Key/GID queries · 969a60f9
      由 Roland Dreier 提交于 
      The SRP initiator is currently using ib_find_cached_pkey() and
ib_get_cached_gid() in situations where the uncached ib_find_pkey()
and ib_query_gid() functions serve just as well: sleeping is allowed
and performance is not an issue.  Since we want to eliminate the
cached operations in the long term, convert SRP to use the uncached
variants.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      969a60f9
    • J
      dsp56k: use request_firmware · 7f127d5e
      由 Jaswinder Singh 提交于 
      Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      7f127d5e
    • J
      edgeport-ti: use request_firmware() · d12b219a
      由 Jaswinder Singh 提交于 
      Firmware blob looks like this...
        uint8_t  MajorVersion
        uint8_t  MinorVersion
        __le16   BuildNumber
        uint8_t  data[]
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      d12b219a
    • J
      edgeport: use request_firmware() · 5b9ea932
      由 Jaswinder Singh 提交于 
      Version number provided in first HEX record.
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      5b9ea932
    • J
      vicam: use request_firmware() · fb54be87
      由 Jaswinder Singh 提交于 
      Although it wasn't actually using ihex records before, we use the Intel
HEX record format for this firmware -- because that gives us a simple
way to split it into separate chunks internally as we need, without
loading each part as a separate file.
Signed-off-by: NJaswinder Singh <jaswinder@infradead.org>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      fb54be87
    • D
      dabusb: use request_firmware() · c4667746
      由 David Woodhouse 提交于 
      Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      c4667746
    • D
      cpia2: use request_firmware() · 04a33e40
      由 David Woodhouse 提交于 
      Thanks for Jaswinder Singh for converting the firmware blob itself to ihex.
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
      04a33e40
  3. 14 7月, 2008 24 次提交