diff options
| -rw-r--r-- | sys/dev/fxp/if_fxp.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sys/dev/fxp/if_fxp.c b/sys/dev/fxp/if_fxp.c index f1588c9d8ab0..63b2b9ec9d7e 100644 --- a/sys/dev/fxp/if_fxp.c +++ b/sys/dev/fxp/if_fxp.c @@ -1288,15 +1288,22 @@ fxp_intr_body(struct fxp_softc *sc, u_int8_t statack, int count) * Process receiver interrupts. If a no-resource (RNR) * condition exists, get whatever packets we can and * re-start the receiver. + */ + +#ifdef DEVICE_POLLING + /* * When using polling, we do not process the list to completion, * so when we get an RNR interrupt we must defer the restart * until we hit the last buffer with the C bit set. * If we run out of cycles and rfa_headm has the C bit set, * record the pending RNR in an unused status bit, so that the * info will be used in the subsequent polling cycle. + * + * XXX there is absolutely no guarantee that this reserved bit + * will be ignored by the hardware! */ - #define FXP_RFA_RNRMARK 0x4000 /* used to mark a pending RNR intr */ +#endif for (;;) { m = sc->rfa_headm; @@ -1311,8 +1318,10 @@ fxp_intr_body(struct fxp_softc *sc, u_int8_t statack, int count) if ( (rfa->rfa_status & FXP_RFA_STATUS_C) == 0) break; +#ifdef DEVICE_POLLING if (rfa->rfa_status & FXP_RFA_RNRMARK) rnr = 1; +#endif /* * Remove first packet from the chain. */ @@ -1347,15 +1356,19 @@ fxp_intr_body(struct fxp_softc *sc, u_int8_t statack, int count) } } if (rnr) { +#ifdef DEVICE_POLLING if (rfa->rfa_status & FXP_RFA_STATUS_C) rfa->rfa_status |= FXP_RFA_RNRMARK; else { +#endif fxp_scb_wait(sc); CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, vtophys(sc->rfa_headm->m_ext.ext_buf) + RFA_ALIGNMENT_FUDGE); fxp_scb_cmd(sc, FXP_SCB_COMMAND_RU_START); +#ifdef DEVICE_POLLING } +#endif } } |