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4201341ff7
The mpt driver previously didn't report a 'maxio' size to CAM, and so the da(4) driver limited I/O sizes to DFLTPHYS (64K) by default. The number of scatter gather segments allowed, as reported to busdma, was (128K / PAGE_SIZE) + 1, or 33 on architectures with 4K pages. Change things around so that we wait until we've determined how many segments the adapter can support before creating the busdma tag used for buffers, so we can potentially support more S/G segments and therefore larger I/O sizes. Also, fix some things that were broken about the module unload path. It still gets hung up inside CAM, though. mpt.c: Move some busdma initialization calls in here, and call them just after we've gotten the IOCFacts, and know how many S/G segments this adapter can support. mpt.h: Get rid of MPT_MAXPHYS, it is no longer used. Add max_cam_seg_cnt, which is used to report our maximum I/O size up to CAM. mpt_cam.c: Use max_cam_seg_cnt to report our maximum I/O size to CAM. Fix the locking in mpt_cam_detach(). mpt_pci.c: Pull some busdma initialization and teardown out and put it in mpt.c. We now delay it until we know many scatter gather segments the adapter can support, and therefore how to setup our busdma tags. mpt_raid.c: Make sure we wake up the right wait channel to get the raid thread to wake up when we're trying to shut it down. Reviewed by: gibbs, mjacob MFC after: 2 weeks |
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| .. | ||
| mpilib | ||
| mpt_cam.c | ||
| mpt_cam.h | ||
| mpt_debug.c | ||
| mpt_pci.c | ||
| mpt_raid.c | ||
| mpt_raid.h | ||
| mpt_reg.h | ||
| mpt_user.c | ||
| mpt.c | ||
| mpt.h | ||