| if_arge.c (209802) | if_arge.c (209807) |
|---|---|
| 1/*- 2 * Copyright (c) 2009, Oleksandr Tymoshenko 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 12 unchanged lines hidden (view full) --- 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2009, Oleksandr Tymoshenko 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 12 unchanged lines hidden (view full) --- 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> |
| 29__FBSDID("$FreeBSD: head/sys/mips/atheros/if_arge.c 209802 2010-07-08 14:34:15Z adrian $"); | 29__FBSDID("$FreeBSD: head/sys/mips/atheros/if_arge.c 209807 2010-07-08 14:59:32Z adrian $"); |
| 30 31/* 32 * AR71XX gigabit ethernet driver 33 */ 34#ifdef HAVE_KERNEL_OPTION_HEADERS 35#include "opt_device_polling.h" 36#endif 37 --- 791 unchanged lines hidden (view full) --- 829 /* Start listening */ 830 ARGE_WRITE(sc, AR71XX_DMA_RX_CONTROL, DMA_RX_CONTROL_EN); 831 832 /* Enable interrupts */ 833 ARGE_WRITE(sc, AR71XX_DMA_INTR, DMA_INTR_ALL); 834} 835 836/* | 30 31/* 32 * AR71XX gigabit ethernet driver 33 */ 34#ifdef HAVE_KERNEL_OPTION_HEADERS 35#include "opt_device_polling.h" 36#endif 37 --- 791 unchanged lines hidden (view full) --- 829 /* Start listening */ 830 ARGE_WRITE(sc, AR71XX_DMA_RX_CONTROL, DMA_RX_CONTROL_EN); 831 832 /* Enable interrupts */ 833 ARGE_WRITE(sc, AR71XX_DMA_INTR, DMA_INTR_ALL); 834} 835 836/* |
| 837 * Return whether the mbuf chain is correctly aligned 838 * for the arge TX engine. 839 * 840 * The TX engine requires each fragment to be aligned to a 841 * 4 byte boundary and the size of each fragment except 842 * the last to be a multiple of 4 bytes. 843 */ 844static int 845arge_mbuf_chain_is_tx_aligned(struct mbuf *m0) 846{ 847 struct mbuf *m; 848 849 for (m = m0; m != NULL; m = m->m_next) { 850 if((mtod(m, intptr_t) & 3) != 0) 851 return 0; 852 if ((m->m_next != NULL) && ((m->m_len & 0x03) != 0)) 853 return 0; 854 } 855 return 1; 856} 857 858/* |
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| 837 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 838 * pointers to the fragment pointers. 839 */ 840static int 841arge_encap(struct arge_softc *sc, struct mbuf **m_head) 842{ 843 struct arge_txdesc *txd; 844 struct arge_desc *desc, *prev_desc; 845 bus_dma_segment_t txsegs[ARGE_MAXFRAGS]; 846 int error, i, nsegs, prod, prev_prod; 847 struct mbuf *m; 848 849 ARGE_LOCK_ASSERT(sc); 850 851 /* 852 * Fix mbuf chain, all fragments should be 4 bytes aligned and 853 * even 4 bytes 854 */ 855 m = *m_head; | 859 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data 860 * pointers to the fragment pointers. 861 */ 862static int 863arge_encap(struct arge_softc *sc, struct mbuf **m_head) 864{ 865 struct arge_txdesc *txd; 866 struct arge_desc *desc, *prev_desc; 867 bus_dma_segment_t txsegs[ARGE_MAXFRAGS]; 868 int error, i, nsegs, prod, prev_prod; 869 struct mbuf *m; 870 871 ARGE_LOCK_ASSERT(sc); 872 873 /* 874 * Fix mbuf chain, all fragments should be 4 bytes aligned and 875 * even 4 bytes 876 */ 877 m = *m_head; |
| 856 if((mtod(m, intptr_t) & 3) != 0) { | 878 if (! arge_mbuf_chain_is_tx_aligned(m)) { |
| 857 m = m_defrag(*m_head, M_DONTWAIT); 858 if (m == NULL) { 859 *m_head = NULL; 860 return (ENOBUFS); 861 } 862 *m_head = m; 863 } 864 --- 963 unchanged lines hidden --- | 879 m = m_defrag(*m_head, M_DONTWAIT); 880 if (m == NULL) { 881 *m_head = NULL; 882 return (ENOBUFS); 883 } 884 *m_head = m; 885 } 886 --- 963 unchanged lines hidden --- |