From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John W. Linville" Subject: [patch 2.4.28-rc3] tulip: make tulip_stop_rxtx() wait for DMA to fully stop Date: Wed, 17 Nov 2004 15:15:53 -0500 Message-ID: <20041117151553.C31363@tuxdriver.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@oss.sgi.com, jgarzik@pobox.com, grant.grundler@hp.com, charlie.brett@hp.com Return-path: To: linux-kernel@vger.kernel.org Content-Disposition: inline Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org tulip_stop_rxtx() doesn't wait for DMA to fully stop like the function call name implies. Acked-by: Grant Grundler Acked-by: Charlie Brett Signed-off-by: John W. Linville --- This was submitted through my employer -- I am not the original author of this patch. However, I passed it by Jeff Garizk and he expressed interest in having it upstream. drivers/net/tulip/21142.c | 2 +- drivers/net/tulip/eeprom.c | 1 + drivers/net/tulip/interrupt.c | 2 +- drivers/net/tulip/media.c | 1 + drivers/net/tulip/pnic.c | 1 + drivers/net/tulip/pnic2.c | 2 +- drivers/net/tulip/timer.c | 1 + drivers/net/tulip/tulip.h | 15 ++++++++++++++- drivers/net/tulip/tulip_core.c | 2 +- 9 files changed, 22 insertions(+), 5 deletions(-) --- tulip_stop_rxtx-2.4/drivers/net/tulip/tulip_core.c.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/tulip_core.c @@ -20,8 +20,8 @@ #include #include -#include "tulip.h" #include +#include "tulip.h" #include #include #include --- tulip_stop_rxtx-2.4/drivers/net/tulip/media.c.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/media.c @@ -18,6 +18,7 @@ #include #include #include +#include #include "tulip.h" --- tulip_stop_rxtx-2.4/drivers/net/tulip/21142.c.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/21142.c @@ -14,8 +14,8 @@ */ -#include "tulip.h" #include +#include "tulip.h" #include --- tulip_stop_rxtx-2.4/drivers/net/tulip/timer.c.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/timer.c @@ -14,6 +14,7 @@ */ +#include #include "tulip.h" --- tulip_stop_rxtx-2.4/drivers/net/tulip/tulip.h.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/tulip.h @@ -146,6 +146,9 @@ enum status_bits { TxIntr = 0x01, }; +/* bit mask for CSR5 TX/RX process state */ +#define CSR5_TS 0x00700000 +#define CSR5_RS 0x000e0000 enum tulip_mode_bits { TxThreshold = (1 << 22), @@ -484,9 +487,19 @@ static inline void tulip_stop_rxtx(struc u32 csr6 = inl(ioaddr + CSR6); if (csr6 & RxTx) { + unsigned i=1300/10; outl(csr6 & ~RxTx, ioaddr + CSR6); barrier(); - (void) inl(ioaddr + CSR6); /* mmio sync */ + /* wait until in-flight frame completes. + * Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin) + * Typically expect this loop to end in < 50us on 100BT. + */ + while (--i && (inl(ioaddr + CSR5) & (CSR5_TS|CSR5_RS))) + udelay(10); + + if (!i) + printk (KERN_DEBUG "%s: tulip_stop_rxtx() failed\n", + tp->pdev->slot_name); } } --- tulip_stop_rxtx-2.4/drivers/net/tulip/pnic.c.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/pnic.c @@ -15,6 +15,7 @@ */ #include +#include #include "tulip.h" --- tulip_stop_rxtx-2.4/drivers/net/tulip/pnic2.c.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/pnic2.c @@ -76,8 +76,8 @@ -#include "tulip.h" #include +#include "tulip.h" #include --- tulip_stop_rxtx-2.4/drivers/net/tulip/eeprom.c.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/eeprom.c @@ -14,6 +14,7 @@ */ +#include #include "tulip.h" #include #include --- tulip_stop_rxtx-2.4/drivers/net/tulip/interrupt.c.orig +++ tulip_stop_rxtx-2.4/drivers/net/tulip/interrupt.c @@ -14,10 +14,10 @@ */ +#include #include "tulip.h" #include #include -#include int tulip_rx_copybreak;