273748cc90
Currently, iw_cxgb3 is severely limited on the amount of userspace memory that can be registered in in a single memory region, which causes big problems for applications that expect to be able to register 100s of MB. The problem is that the driver uses a single kmalloc()ed buffer to hold the physical buffer list (PBL) for the entire memory region during registration, which means that 8 bytes of contiguous memory are required for each page of memory being registered. For example, a 64 MB registration will require 128 KB of contiguous memory with 4 KB pages, and it unlikely that such an allocation will succeed on a busy system. This is purely a driver problem: the temporary page list buffer is not needed by the hardware, so we can fix this by writing the PBL to the hardware in page-sized chunks rather than all at once. We do this by splitting the memory registration operation up into several steps: - Allocate PBL space in adapter memory for the full registration - Copy PBL to adapter memory in chunks - Allocate STag and enable memory region This also allows several other cleanups to the __cxio_tpt_op() interface and related parts of the driver. This change leaves the reregister memory region and memory window operations broken, but they already didn't work due to other longstanding bugs, so fixing them will be left to a later patch. Signed-off-by: Roland Dreier <rolandd@cisco.com> |
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| .. | ||
| cxio_dbg.c | ||
| cxio_hal.c | ||
| cxio_hal.h | ||
| cxio_resource.c | ||
| cxio_resource.h | ||
| cxio_wr.h | ||
| iwch_cm.c | ||
| iwch_cm.h | ||
| iwch_cq.c | ||
| iwch_ev.c | ||
| iwch_mem.c | ||
| iwch_provider.c | ||
| iwch_provider.h | ||
| iwch_qp.c | ||
| iwch_user.h | ||
| iwch.c | ||
| iwch.h | ||
| Kconfig | ||
| Makefile | ||
| tcb.h | ||