Author: adrian
Date: Wed Feb 8 06:43:02 2017
New Revision: 313412
URL: https://svnweb.freebsd.org/changeset/base/313412
Log:
[iwm] Get rid of iwm_disable_rx_dma, just use iwm_pcie_rx_stop directly.
* This also fixes one of many small nic lock handling bugs, and matches
iwlwifi's code.
Obtained from: DragonflyBSD git
50787d03cd0a0366c9cc4a055bb6977e5f65c85d
Modified:
head/sys/dev/iwm/if_iwm.c
head/sys/dev/iwm/if_iwm_pcie_trans.c
Modified: head/sys/dev/iwm/if_iwm.c
==============================================================================
--- head/sys/dev/iwm/if_iwm.c Wed Feb 8 03:21:29 2017 (r313411)
+++ head/sys/dev/iwm/if_iwm.c Wed Feb 8 06:43:02 2017 (r313412)
@@ -302,7 +302,6 @@ static int iwm_alloc_sched(struct iwm_so
static int iwm_alloc_kw(struct iwm_softc *);
static int iwm_alloc_ict(struct iwm_softc *);
static int iwm_alloc_rx_ring(struct iwm_softc *, struct iwm_rx_ring *);
-static void iwm_disable_rx_dma(struct iwm_softc *);
static void iwm_reset_rx_ring(struct iwm_softc *, struct iwm_rx_ring *);
static void iwm_free_rx_ring(struct iwm_softc *, struct iwm_rx_ring *);
static int iwm_alloc_tx_ring(struct iwm_softc *, struct iwm_tx_ring *,
@@ -1104,18 +1103,6 @@ fail: iwm_free_rx_ring(sc, ring);
}
static void
-iwm_disable_rx_dma(struct iwm_softc *sc)
-{
- /* XXX conditional nic locks are stupid */
- /* XXX print out if we can't lock the NIC? */
- if (iwm_nic_lock(sc)) {
- /* XXX handle if RX stop doesn't finish? */
- (void) iwm_pcie_rx_stop(sc);
- iwm_nic_unlock(sc);
- }
-}
-
-static void
iwm_reset_rx_ring(struct iwm_softc *sc, struct iwm_rx_ring *ring)
{
/* Reset the ring state */
@@ -1401,7 +1388,7 @@ iwm_stop_device(struct iwm_softc *sc)
}
iwm_nic_unlock(sc);
}
- iwm_disable_rx_dma(sc);
+ iwm_pcie_rx_stop(sc);
/* Stop RX ring. */
iwm_reset_rx_ring(sc, &sc->rxq);
@@ -1485,16 +1472,18 @@ iwm_mvm_nic_config(struct iwm_softc *sc)
static int
iwm_nic_rx_init(struct iwm_softc *sc)
{
- if (!iwm_nic_lock(sc))
- return EBUSY;
-
/*
* Initialize RX ring. This is from the iwn driver.
*/
memset(sc->rxq.stat, 0, sizeof(*sc->rxq.stat));
- /* stop DMA */
- iwm_disable_rx_dma(sc);
+ /* Stop Rx DMA */
+ iwm_pcie_rx_stop(sc);
+
+ if (!iwm_nic_lock(sc))
+ return EBUSY;
+
+ /* reset and flush pointers */
IWM_WRITE(sc, IWM_FH_MEM_RCSR_CHNL0_RBDCB_WPTR, 0);
IWM_WRITE(sc, IWM_FH_MEM_RCSR_CHNL0_FLUSH_RB_REQ, 0);
IWM_WRITE(sc, IWM_FH_RSCSR_CHNL0_RDPTR, 0);
Modified: head/sys/dev/iwm/if_iwm_pcie_trans.c
==============================================================================
--- head/sys/dev/iwm/if_iwm_pcie_trans.c Wed Feb 8 03:21:29 2017
(r313411)
+++ head/sys/dev/iwm/if_iwm_pcie_trans.c Wed Feb 8 06:43:02 2017
(r313412)
@@ -572,10 +572,14 @@ iwm_set_pwr(struct iwm_softc *sc)
int
iwm_pcie_rx_stop(struct iwm_softc *sc)
{
-
- IWM_WRITE(sc, IWM_FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
- return (iwm_poll_bit(sc, IWM_FH_MEM_RSSR_RX_STATUS_REG,
- IWM_FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
- IWM_FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
- 1000));
+ int ret = 0;
+ if (iwm_nic_lock(sc)) {
+ IWM_WRITE(sc, IWM_FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
+ ret = iwm_poll_bit(sc, IWM_FH_MEM_RSSR_RX_STATUS_REG,
+ IWM_FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
+ IWM_FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
+ 1000);
+ iwm_nic_unlock(sc);
+ }
+ return ret;
}
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