diff options
Diffstat (limited to 'sys/dev/mpr/mpr_sas.c')
| -rw-r--r-- | sys/dev/mpr/mpr_sas.c | 77 |
1 files changed, 72 insertions, 5 deletions
diff --git a/sys/dev/mpr/mpr_sas.c b/sys/dev/mpr/mpr_sas.c index 55bde0e..1a51109 100644 --- a/sys/dev/mpr/mpr_sas.c +++ b/sys/dev/mpr/mpr_sas.c @@ -813,8 +813,49 @@ mpr_attach_sas(struct mpr_softc *sc) #else event = AC_FOUND_DEVICE; #endif + + /* + * Prior to the CAM locking improvements, we can't call + * xpt_register_async() with a particular path specified. + * + * If a path isn't specified, xpt_register_async() will + * generate a wildcard path and acquire the XPT lock while + * it calls xpt_action() to execute the XPT_SASYNC_CB CCB. + * It will then drop the XPT lock once that is done. + * + * If a path is specified for xpt_register_async(), it will + * not acquire and drop the XPT lock around the call to + * xpt_action(). xpt_action() asserts that the caller + * holds the SIM lock, so the SIM lock has to be held when + * calling xpt_register_async() when the path is specified. + * + * But xpt_register_async calls xpt_for_all_devices(), + * which calls xptbustraverse(), which will acquire each + * SIM lock. When it traverses our particular bus, it will + * necessarily acquire the SIM lock, which will lead to a + * recursive lock acquisition. + * + * The CAM locking changes fix this problem by acquiring + * the XPT topology lock around bus traversal in + * xptbustraverse(), so the caller can hold the SIM lock + * and it does not cause a recursive lock acquisition. + * + * These __FreeBSD_version values are approximate, especially + * for stable/10, which is two months later than the actual + * change. + */ + +#if (__FreeBSD_version < 1000703) || \ + ((__FreeBSD_version >= 1100000) && (__FreeBSD_version < 1100002)) + mpr_unlock(sc); + status = xpt_register_async(event, mprsas_async, sc, + NULL); + mpr_lock(sc); +#else status = xpt_register_async(event, mprsas_async, sc, sassc->path); +#endif + if (status != CAM_REQ_CMP) { mpr_dprint(sc, MPR_ERROR, "Error %#x registering async handler for " @@ -2501,7 +2542,8 @@ mprsas_send_smpcmd(struct mprsas_softc *sassc, union ccb *ccb, sg = NULL; error = 0; -#if __FreeBSD_version >= 1000029 +#if (__FreeBSD_version >= 1000028) || \ + ((__FreeBSD_version >= 902001) && (__FreeBSD_version < 1000000)) switch (ccb->ccb_h.flags & CAM_DATA_MASK) { case CAM_DATA_PADDR: case CAM_DATA_SG_PADDR: @@ -2561,7 +2603,7 @@ mprsas_send_smpcmd(struct mprsas_softc *sassc, union ccb *ccb, xpt_done(ccb); return; } -#else //__FreeBSD_version < 1000029 +#else /* __FreeBSD_version < 1000028 */ /* * XXX We don't yet support physical addresses here. */ @@ -2604,7 +2646,7 @@ mprsas_send_smpcmd(struct mprsas_softc *sassc, union ccb *ccb, bus_dma_segment_t *req_sg; req_sg = (bus_dma_segment_t *)ccb->smpio.smp_request; - request = (uint8_t *)req_sg[0].ds_addr; + request = (uint8_t *)(uintptr_t)req_sg[0].ds_addr; } else request = ccb->smpio.smp_request; @@ -2612,14 +2654,14 @@ mprsas_send_smpcmd(struct mprsas_softc *sassc, union ccb *ccb, bus_dma_segment_t *rsp_sg; rsp_sg = (bus_dma_segment_t *)ccb->smpio.smp_response; - response = (uint8_t *)rsp_sg[0].ds_addr; + response = (uint8_t *)(uintptr_t)rsp_sg[0].ds_addr; } else response = ccb->smpio.smp_response; } else { request = ccb->smpio.smp_request; response = ccb->smpio.smp_response; } -#endif //__FreeBSD_version >= 1000029 +#endif /* __FreeBSD_version < 1000028 */ cm = mpr_alloc_command(sc); if (cm == NULL) { @@ -2987,6 +3029,18 @@ mprsas_async(void *callback_arg, uint32_t code, struct cam_path *path, break; /* + * See the comment in mpr_attach_sas() for a detailed + * explanation. In these versions of FreeBSD we register + * for all events and filter out the events that don't + * apply to us. + */ +#if (__FreeBSD_version < 1000703) || \ + ((__FreeBSD_version >= 1100000) && (__FreeBSD_version < 1100002)) + if (xpt_path_path_id(path) != sassc->sim->path_id) + break; +#endif + + /* * We should have a handle for this, but check to make sure. */ KASSERT(xpt_path_target_id(path) < sassc->maxtargets, @@ -3043,8 +3097,21 @@ mprsas_async(void *callback_arg, uint32_t code, struct cam_path *path, case AC_FOUND_DEVICE: { struct ccb_getdev *cgd; + /* + * See the comment in mpr_attach_sas() for a detailed + * explanation. In these versions of FreeBSD we register + * for all events and filter out the events that don't + * apply to us. + */ +#if (__FreeBSD_version < 1000703) || \ + ((__FreeBSD_version >= 1100000) && (__FreeBSD_version < 1100002)) + if (xpt_path_path_id(path) != sc->sassc->sim->path_id) + break; +#endif + cgd = arg; mprsas_prepare_ssu(sc, path, cgd); + #if (__FreeBSD_version < 901503) || \ ((__FreeBSD_version >= 1000000) && (__FreeBSD_version < 1000006)) mprsas_check_eedp(sc, path, cgd); |
