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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-01-17 00:00:25 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-01-17 00:00:25 +0000 |
commit | 890c7e343d820612308ec3c38a8e6037e7dc8695 (patch) | |
tree | 242fe7daa8a1b11275ac16b9afe1d7a1a2f7812d /nuttx/arch/mips/src/pic32mx | |
parent | 331c8f43eca498006f83c7a6e3b80ade63982b62 (diff) | |
download | px4-nuttx-890c7e343d820612308ec3c38a8e6037e7dc8695.tar.gz px4-nuttx-890c7e343d820612308ec3c38a8e6037e7dc8695.tar.bz2 px4-nuttx-890c7e343d820612308ec3c38a8e6037e7dc8695.zip |
More PIC32 Ethernet stuff (still incomplete)
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4305 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/mips/src/pic32mx')
-rw-r--r-- | nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.c | 483 | ||||
-rw-r--r-- | nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.h | 36 |
2 files changed, 340 insertions, 179 deletions
diff --git a/nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.c b/nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.c index 4d5867242..16232ca5c 100644 --- a/nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.c +++ b/nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.c @@ -98,6 +98,12 @@ # define CONFIG_PIC32MX_NINTERFACES 1 #endif +/* CONFIG_NET_MULTIBUFFER is required */ + +#ifndef CONFIG_NET_MULTIBUFFER +# error "CONFIG_NET_MULTIBUFFER=y is required" +#endif + /* If IGMP is enabled, then accept multi-cast frames. */ #if defined(CONFIG_NET_IGMP) && !defined(CONFIG_NET_MULTICAST) @@ -112,6 +118,20 @@ # define CONFIG_NET_PRIORITY NVIC_SYSH_PRIORITY_MAX #endif +/* Use defaults if the number of discriptors is not provided */ + +#ifndef CONFIG_NET_NTXDESC +# define CONFIG_NET_NTXDESC 2 +#endif + +#ifndef CONFIG_NET_NRXDESC +# define CONFIG_NET_NRXDESC 4 +#endif + +/* The number of buffers will, then, be one for each descriptor plus one extra */ + +#define PIC32MX_NBUFFERS (CONFIG_NET_NRXDESC + CONFIG_NET_NTXDESC + 1) + /* Debug Configuration *****************************************************/ /* Register debug -- can only happen of CONFIG_DEBUG is selected */ @@ -270,21 +290,23 @@ struct pic32mx_driver_s */ #if CONFIG_PIC32MX_NINTERFACES > 1 - uint32_t pd_base; /* Ethernet controller base address */ - int pd_irq; /* Ethernet controller IRQ vector number */ - int pd_irqsrc; /* Ethernet controller IRQ source number */ + uint32_t pd_base; /* Ethernet controller base address */ + int pd_irq; /* Ethernet controller IRQ vector number */ + int pd_irqsrc; /* Ethernet controller IRQ source number */ #endif - bool pd_ifup; /* true:ifup false:ifdown */ - bool pd_mode; /* speed/duplex */ - bool pd_txpending; /* There is a pending Tx in pd_dev */ + bool pd_ifup; /* true:ifup false:ifdown */ + bool pd_mode; /* speed/duplex */ + bool pd_txpending; /* There is a pending Tx in pd_dev */ #ifdef PIC32MX_HAVE_PHY - uint8_t pd_phyaddr; /* PHY device address */ + uint8_t pd_phyaddr; /* PHY device address */ #endif - uint32_t pd_inten; /* Shadow copy of INTEN register */ - WDOG_ID pd_txpoll; /* TX poll timer */ - WDOG_ID pd_txtimeout; /* TX timeout timer */ - + uint32_t pd_inten; /* Shadow copy of INTEN register */ + WDOG_ID pd_txpoll; /* TX poll timer */ + WDOG_ID pd_txtimeout; /* TX timeout timer */ + + sq_queue_t pd_freebuffers; /* The free buffer list */ + #if defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_NET) struct pic32mx_statistics_s pd_stat; #endif @@ -292,6 +314,12 @@ struct pic32mx_driver_s /* This holds the information visible to uIP/NuttX */ struct uip_driver_s pd_dev; /* Interface understood by uIP */ + + /* Descriptors and packet buffers */ + + struct pic32mx_rxdesc_s pd_rxdesc[CONFIG_NET_NRXDESC]; + struct pic32mx_txdesc_s pd_txdesc[CONFIG_NET_NTXDESC]; + uint8_t pd_buffers[PIC32MX_NBUFFERS * CONFIG_NET_BUFSIZE]; }; /**************************************************************************** @@ -318,12 +346,16 @@ static void pic32mx_putreg(uint32_t val, uint32_t addr); # define pic32mx_putreg(val,addr) putreg32(val,addr) #endif -/* Descriptor management */ +/* Buffer and descriptor management */ + +static inline void pic32mx_bufferinit(struct pic32mx_driver_s *priv); +static uint8_t *pic32mx_allocbuffer(struct pic32mx_driver_s *priv); +static void pic32mx_freebuffer(struct pic32mx_driver_s *priv, uint8_t *buffer); static inline void pic32mx_txdescinit(struct pic32mx_driver_s *priv); static inline void pic32mx_rxdescinit(struct pic32mx_driver_s *priv); -static uint32_t *pic32mx_txdesc(struct pic32mx_driver_s *priv); -static uint32_t *pic32mx_rxdesc(struct pic32mx_driver_s *priv); +static struct pic32mx_txdesc_s *pic32mx_txdesc(struct pic32mx_driver_s *priv); +static struct pic32mx_rxdesc_s *pic32mx_rxdesc(struct pic32mx_driver_s *priv); /* Common TX logic */ @@ -506,6 +538,70 @@ static void pic32mx_putreg(uint32_t val, uint32_t addr) #endif /**************************************************************************** + * Function: pic32mx_bufferinit + * + * Description: + * Initialize the buffers by placing them all in a free list + * + * Parameters: + * priv - Pointer to EMAC device driver structure + * + * Returned Value: + * None + * + ****************************************************************************/ + +static inline void pic32mx_bufferinit(struct pic32mx_driver_s *priv) +{ + uint8_t *buffer; + int i; + + for (i = 0, buffer = priv->pd_buffers; i < PIC32MX_NBUFFERS; i++) + { + sq_addlast((sq_entry_t*)buffer, &priv->pd_freebuffers); + buffer += CONFIG_NET_BUFSIZE; + } +} + +/**************************************************************************** + * Function: pic32mx_allocbuffer + * + * Description: + * Allocate one buffer by removing it from the free list + * + * Parameters: + * priv - Pointer to EMAC device driver structure + * + * Returned Value: + * Pointer to the allocated buffer (or NULL on failure) + * + ****************************************************************************/ + +static uint8_t *pic32mx_allocbuffer(struct pic32mx_driver_s *priv) +{ + return (uint8_t*)sq_remfirst(&priv->pd_freebuffers); +} + +/**************************************************************************** + * Function: pic32mx_freebuffer + * + * Description: + * Free one buffer by returning it to the free list + * + * Parameters: + * priv - Pointer to EMAC device driver structure + * + * Returned Value: + * Pointer to the allocated buffer (or NULL on failure) + * + ****************************************************************************/ + +static void pic32mx_freebuffer(struct pic32mx_driver_s *priv, uint8_t *buffer) +{ + sq_addlast((sq_entry_t*)buffer, &priv->pd_freebuffers); +} + +/**************************************************************************** * Function: pic32mx_txdescinit * * Description: @@ -515,9 +611,7 @@ static void pic32mx_putreg(uint32_t val, uint32_t addr) * priv - Pointer to EMAC device driver structure * * Returned Value: - * None directory. - * As a side-effect, it will initialize priv->pd_phyaddr and - * priv->pd_phymode. + * None * * Assumptions: * @@ -525,34 +619,32 @@ static void pic32mx_putreg(uint32_t val, uint32_t addr) static inline void pic32mx_txdescinit(struct pic32mx_driver_s *priv) { - uint32_t *txdesc; - uint32_t pktaddr; + struct pic32mx_txdesc_s *txdesc; int i; /* Assign a buffer to each TX descriptor. For now, just mark each TX * descriptor as owned by softare andnot linked. */ - txdesc = (uint32_t*)PIC32MX_TXDESC_BASE; - pktaddr = PIC32MX_TXBUFFER_BASE; - for (i = 0; i < CONFIG_NET_NTXDESC; i++) { - txdesc[TXDESC_STATUS] = TXDESC_STATUS_SOWN; - txdesc[TXDESC_ADDRESS] = PHYS_ADDR(pktaddr); - txdesc[TXDESC_TSV1] = 0; - txdesc[TXDESC_TSV2] = 0; - txdesc[TXDESC_NEXTED] = 0; - - txdesc += TXDESC_SIZE; - pktaddr += PIC32MX_MAXPACKET_SIZE; + txdesc = &priv->pd_txdesc[i]; + txdesc->status = TXDESC_STATUS_SOWN; + txdesc->address = 0; + txdesc->tsv1 = 0; + txdesc->tsv2 = 0; + txdesc->nexted = (uint32_t)&priv->pd_txdesc[i+1]; } + /* Terminate the last entry with a null NEXTED pointer */ + + txdesc[CONFIG_NET_NTXDESC-1].nexted = 0; + /* Update the ETHTXST register with the physical address of the head of * the TX descriptors list. */ - pic32mx_putreg(PHYS_ADDR(PIC32MX_TXDESC_BASE), PIC32MX_ETH_TXST); + pic32mx_putreg(PHYS_ADDR(priv->pd_txdesc), PIC32MX_ETH_TXST); } /**************************************************************************** @@ -565,9 +657,7 @@ static inline void pic32mx_txdescinit(struct pic32mx_driver_s *priv) * priv - Pointer to EMAC device driver structure * * Returned Value: - * None directory. - * As a side-effect, it will initialize priv->pd_phyaddr and - * priv->pd_phymode. + * None * * Assumptions: * @@ -575,8 +665,7 @@ static inline void pic32mx_txdescinit(struct pic32mx_driver_s *priv) static inline void pic32mx_rxdescinit(struct pic32mx_driver_s *priv) { - uint32_t *rxdesc; - uint32_t pktaddr; + struct pic32mx_rxdesc_s *rxdesc; int i; /* Prepare a list of RX descriptors populated with valid buffers for @@ -586,32 +675,30 @@ static inline void pic32mx_rxdescinit(struct pic32mx_driver_s *priv) * corresponding RX buffer. */ - rxdesc = (uint32_t*)PIC32MX_RXDESC_BASE; - pktaddr = PIC32MX_RXBUFFER_BASE; + rxdesc = priv->pd_rxdesc; for (i = 0; i < (CONFIG_NET_NRXDESC-1); i++) { - rxdesc[RXDESC_STATUS] = RXDESC_STATUS_EOWN | TXDESC_STATUS_NPV; - rxdesc[RXDESC_ADDRESS] = PHYS_ADDR(pktaddr); - rxdesc[RXDESC_RSV1] = 0; - rxdesc[RXDESC_RSV2] = 0; - rxdesc[RXDESC_NEXTED] = rxdesc + 5; - - rxdesc += RXDESC_SIZE; - pktaddr += PIC32MX_MAXPACKET_SIZE; + rxdesc = &priv->pd_rxdesc[i]; + rxdesc->status = RXDESC_STATUS_EOWN | TXDESC_STATUS_NPV; + rxdesc->address = PHYS_ADDR(pic32mx_allocbuffer(priv)); + rxdesc->rsv1 = 0; + rxdesc->rsv2 = 0; + rxdesc->nexted = (uint32_t)&priv->pd_rxdesc[i+1]; } - rxdesc[RXDESC_STATUS] = RXDESC_STATUS_EOWN; - rxdesc[RXDESC_ADDRESS] = PHYS_ADDR(pktaddr); - rxdesc[RXDESC_RSV1] = 0; - rxdesc[RXDESC_RSV2] = 0; - rxdesc[RXDESC_NEXTED] = 0; + rxdesc = &priv->pd_rxdesc[CONFIG_NET_NRXDESC-1]; + rxdesc->status = RXDESC_STATUS_EOWN; + rxdesc->address = PHYS_ADDR(pic32mx_allocbuffer(priv)); + rxdesc->rsv1 = 0; + rxdesc->rsv2 = 0; + rxdesc->nexted = 0; /* Update the ETHRXST register with the physical address of the head of the * RX descriptors list. */ - pic32mx_putreg(PHYS_ADDR(PIC32MX_RXDESC_BASE), PIC32MX_ETH_RXST); + pic32mx_putreg(PHYS_ADDR(priv->pd_rxdesc), PIC32MX_ETH_RXST); } /**************************************************************************** @@ -633,28 +720,27 @@ static inline void pic32mx_rxdescinit(struct pic32mx_driver_s *priv) * ****************************************************************************/ -static uint32_t pic32mx_txdesc(struct pic32mx_driver_s *priv) +static struct pic32mx_txdesc_s *pic32mx_txdesc(struct pic32mx_driver_s *priv) { - uint32_t *txdesc; + struct pic32mx_txdesc_s *txdesc; + int i; /* Inspect the list of TX descriptors to see if the EOWN bit is cleared. If it * is, this descriptor is now under software control and the message was * transmitted. */ - txdesc = (uint32_t*)PIC32MX_TXDESC_BASE; - for (i = 0; i < CONFIG_NET_NTXDESC; i++) { /* Check if software owns this descriptor */ - if ((txdesc[TXDESC_STATUS] & TXDESC_STATUS_EOWN) == 0) + txdesc = &priv->pd_txdesc[i]; + if ((txdesc->status & TXDESC_STATUS_EOWN) == 0) { /* Yes.. return a pointer to the desciptor */ return txdesc; } - txdesc += TXDESC_SIZE; } /* All descriptors are owned by the Ethernet controller.. return NULL */ @@ -681,9 +767,10 @@ static uint32_t pic32mx_txdesc(struct pic32mx_driver_s *priv) * ****************************************************************************/ -static uint32_t *pic32mx_rxdesc(struct pic32mx_driver_s *priv) +static struct pic32mx_rxdesc_s *pic32mx_rxdesc(struct pic32mx_driver_s *priv) { - uint32_t *rxdesc; + struct pic32mx_rxdesc_s *rxdesc; + int i; /* Inspect the list of RX descriptors to see if the EOWN bit is cleared. * If it is, this descriptor is now under software control and a message was @@ -691,19 +778,17 @@ static uint32_t *pic32mx_rxdesc(struct pic32mx_driver_s *priv) * RSV and PKT_CHECKSUM to get the message characteristics. */ - rxdesc = (uint32_t*)PIC32MX_RXDESC_BASE; - for (i = 0; i < CONFIG_NET_NRXDESC; i++) { /* Check if software owns this descriptor */ - if ((rxdesc[RXDESC_STATUS] & RXDESC_STATUS_EOWN) == 0) + rxdesc = &priv->pd_rxdesc[i]; + if ((rxdesc->status & RXDESC_STATUS_EOWN) == 0) { /* Yes.. return a pointer to the desciptor */ return rxdesc; } - rxdesc += RXDESC_SIZE; } /* All descriptors are owned by the Ethernet controller.. return NULL */ @@ -733,21 +818,19 @@ static uint32_t *pic32mx_rxdesc(struct pic32mx_driver_s *priv) static int pic32mx_transmit(struct pic32mx_driver_s *priv) { - uint32_t *txdesc; - void *txbuffer; + struct pic32mx_txdesc_s *txdesc; /* Verify that the hardware is ready to send another packet. If we get * here, then we are committed to sending a packet; Higher level logic * must have assured that there is no transmission in progress. */ - DEBUGASSERT(pic32mx_txdesc(priv) != NULL); + DEBUGASSERT(priv->pd_dev.d_buf && priv->pd_dev.d_len < CONFIG_NET_BUFSIZE); /* Increment statistics and dump the packet *if so configured) */ EMAC_STAT(priv, tx_packets); - pic32mx_dumppacket("Transmit packet", - priv->pd_dev.d_buf, priv->pd_dev.d_len); + pic32mx_dumppacket("Transmit packet", priv->pd_dev.d_buf, priv->pd_dev.d_len); /* In order to transmit a message: * @@ -758,59 +841,37 @@ static int pic32mx_transmit(struct pic32mx_driver_s *priv) * the message. */ - /* Update the necessary number of TX descriptors, starting with the head of - * the list, by setting the DATA_BUFFER_ADDRESS to be the physical address of - * the corresponding buffer in the message to be transmitted. - */ -#warning "Missing logic" - - /* Update BYTE_COUNT for each descriptor with the number of bytes contained in - * each buffer. + /* Find the first available TX descriptor. We are guaranteed that is will + * not fail by upstream logic that assures that a TX packet is available + * before polling uIP. */ -#warning "Missing logic" - - /* Set EOWN = 1 for each descriptor that belongs to the packet. */ -#warning "Missing logic" - - /* Use SOP and EOP to specify that the message uses one or more TX descriptors. */ -#warning "Missing logic" - - /* Enable the transmission of the message, set the TXRTS bit (ETHCON1:9). */ -#warning "Missing logic" + txdesc = pic32mx_txdesc(priv); + DEBUGASSERT(txdesc != NULL); - /* Inspect the list of TX descriptors to see if the EOWN bit is cleared. If it - * is, this descriptor is now under software control and the message was - * transmitted. Use TSV to check for the transmission result. + /* Remove the transmit buffer from the device structure and assign it to + * the TX descriptor. */ -#warning "Missing logic" - txdesc = (uint32_t*)NULL; -#warning "The rest is residual LPC17xx logic that needs to be removed" + txdesc->address = PHYS_ADDR(priv->pd_dev.d_buf); + priv->pd_dev.d_buf = NULL; - /* Get the packet address from the descriptor and set the descriptor control - * fields. + /* Set the BYTE_COUNT for in the TX descriptor with the number of bytes + * contained in the buffer. */ - txbuffer = (void*)*txdesc++; - *txdesc = TXDESC_CONTROL_INT | TXDESC_CONTROL_LAST | TXDESC_CONTROL_CRC | - (priv->pd_dev.d_len - 1); + txdesc->tsv2 &= TXDESC_TSV2_BYTECOUNT_MASK; + txdesc->tsv2 |= ((uint32_t)priv->pd_dev.d_len << TXDESC_TSV2_BYTECOUNT_SHIFT); + priv->pd_dev.d_len = 0; - /* Copy the packet data into the Tx buffer assignd to this descriptor. It - * should fit because each packet buffer is the MTU size and breaking up - * largerTCP messasges is handled by higher level logic. The hardware - * does, however, support breaking up larger messages into many fragments, - * however, that capability is not exploited here. - * - * This would be a great performance improvement: Remove the buffer from - * the pd_dev structure and replace it a pointer directly into the EMAC - * DMA memory. This could eliminate the following, costly memcpy. + /* Set EOWN = 1 to indicate that the packet belongs to Ethernet and set both + * SOP and EOP to indicate that the packet both begins and ends with this + * frame. */ - DEBUGASSERT(priv->pd_dev.d_len <= PIC32MX_MAXPACKET_SIZE); - memcpy(txbuffer, priv->pd_dev.d_buf, priv->pd_dev.d_len); + txdesc->status |= (TXDESC_STATUS_EOWN | TXDESC_STATUS_EOP | TXDESC_STATUS_SOP); - /* Make sure that the TX transfer is enabled */ + /* Enable the transmission of the message by setting the TXRTS bit (ETHCON1:9). */ pic32mx_putreg(ETH_CON1_TXRTS | ETH_CON1_ON, PIC32MX_ETH_CON1SET); @@ -872,9 +933,9 @@ static int pic32mx_uiptxpoll(struct uip_driver_s *dev) * return any non-zero value to terminate the poll. */ - if (pic32mx_txdesc(priv) == NULL) + if (pic32mx_txdesc(priv) == NULL || sq_empty(&priv->pd_freebuffers)) { - /* There are no more TX descriptors available.. stop the poll */ + /* There are no more TX descriptors/buffers available.. stop the poll */ return -EAGAIN; } @@ -913,7 +974,7 @@ static int pic32mx_uiptxpoll(struct uip_driver_s *dev) static void pic32mx_response(struct pic32mx_driver_s *priv) { - uint32_t *txdesc; + struct pic32mx_txdesc_s *txdesc; /* Check if there is room in the device to hold another packet. */ @@ -956,15 +1017,12 @@ static void pic32mx_response(struct pic32mx_driver_s *priv) static void pic32mx_rxdone(struct pic32mx_driver_s *priv) { - uint32_t *rxdesc; - bool fragment; - unsigned int pktlen; + struct pic32mx_rxdesc_s *rxdesc; /* Loop while there are incoming packets to be processed, that is, while * the producer index is not equal to the consumer index. */ - fragment = false; for (;;) { /* Check if any RX descriptor has the EOWN bit cleared meaning that the @@ -986,70 +1044,56 @@ static void pic32mx_rxdone(struct pic32mx_driver_s *priv) EMAC_STAT(priv, rx_packets); - /* Use SOP and EOP to extract the message, use BYTE_COUNT, RXF_RSV, - * RSV and PKT_CHECKSUM to get the message characteristics. - */ -#warning "Missing logic" - /* Get the packet length */ - pktlen = (rxdesc[RXDESC_RSV1] & RXDESC_RSV1_BYTECOUNT_MASK) >> RXDESC_RSV1_BYTECOUNT_SHIFT; + priv->pd_dev.d_len = (rxdesc->rsv1 & RXDESC_RSV1_BYTECOUNT_MASK) >> RXDESC_RSV1_BYTECOUNT_SHIFT; - /* Check for errors. NOTE: The DMA engine reports bogus length errors, - * making this a pretty useless check. - */ + /* Check for errors */ -#warning "The rest is residual LPC17xx logic that needs to be removed" - if ((*rxdesc & RXSTAT_INFO_ERROR) != 0) + if ((rxdesc->status & RXDESC_RSV1_OK) == 0) { - nlldbg("Error. rxdesc: %08x\n", *rxdesc); + nlldbg("Error. rxdesc: %08x\n", rxdesc->status); EMAC_STAT(priv, rx_pkterr); } - /* If the pktlen is greater then the buffer, then we cannot accept + /* If the packet length is greater then the buffer, then we cannot accept * the packet. Also, since the DMA packet buffers are set up to * be the same size as our max packet size, any fragments also * imply that the packet is too big. */ - /* else */ if (pktlen > CONFIG_NET_BUFSIZE + CONFIG_NET_GUARDSIZE) + else if (priv->pd_dev.d_len > CONFIG_NET_BUFSIZE) { - nlldbg("Too big. pktlen: %d rxdesc: %08x\n", pktlen, *rxdesc); + nlldbg("Too big. packet length: %d rxdesc: %08x\n", priv->pd_dev.d_len, rxdesc->status); EMAC_STAT(priv, rx_pktsize); } - else if ((*rxdesc & RXSTAT_INFO_LASTFLAG) == 0) - { - nlldbg("Fragment. pktlen: %d rxdesc: %08x\n", pktlen, *rxdesc); - EMAC_STAT(priv, rx_fragment); - fragment = true; - } - else if (fragment) + + /* We don't have any logic here for reassembling packets from fragments. */ + + else if ((rxdesc->status & (RXDESC_STATUS_EOP|RXDESC_STATUS_SOP)) != (RXDESC_STATUS_EOP|RXDESC_STATUS_SOP)) { - nlldbg("Last fragment. pktlen: %d rxdesc: %08x\n", pktlen, *rxdesc); + nlldbg("Fragment. packet length: %d rxdesc: %08x\n", priv->pd_dev.d_len, rxdesc->status); EMAC_STAT(priv, rx_fragment); - fragment = false; } else { - uint32_t *rxdesc; - void *rxbuffer; + uint8_t *rxbuffer; /* Get the Rx buffer address from the Rx descriptor */ - rxdesc = (uint32_t*)NULL; // ###### FOR NOW - rxbuffer = (void*)*rxdesc; - - /* Copy the data data from the EMAC DMA RAM to priv->pd_dev.d_buf. - * Set amount of data in priv->pd_dev.d_len - * - * Here would be a great performance improvement: Remove the - * buffer from the pd_dev structure and replace it with a pointer - * directly into the EMAC DMA memory. This could eliminate the - * following, costly memcpy. - */ + priv->pd_dev.d_buf = (uint8_t*)VIRT_ADDR(rxdesc->address); + + /* Replace the buffer in the RX descriptor with a new one */ + + rxbuffer = pic32mx_allocbuffer(priv); + DEBUGASSERT(rxbuffer != NULL); + rxdesc->address = PHYS_ADDR(rxbuffer); + + /* And give the RX descriptor back to the hardware */ - memcpy(priv->pd_dev.d_buf, rxbuffer, pktlen); - priv->pd_dev.d_len = pktlen; + rxdesc->status = RXDESC_STATUS_EOWN | TXDESC_STATUS_NPV; + rxdesc->rsv1 = 0; + rxdesc->rsv1 = 0; pic32mx_dumppacket("Received packet", priv->pd_dev.d_buf, priv->pd_dev.d_len); @@ -1100,6 +1144,15 @@ static void pic32mx_rxdone(struct pic32mx_driver_s *priv) EMAC_STAT(priv, rx_dropped); } + + /* Discard any buffers still attached to the device structure */ + + priv->pd_dev.d_len = 0; + if (priv->pd_dev.d_buf) + { + pic32mx_freebuffer(priv, priv->pd_dev.d_buf); + priv->pd_dev.d_buf = NULL; + } } } } @@ -1123,6 +1176,9 @@ static void pic32mx_rxdone(struct pic32mx_driver_s *priv) static void pic32mx_txdone(struct pic32mx_driver_s *priv) { + struct pic32mx_txdesc_s *txdesc; + int i; + /* Cancel the pending Tx timeout */ wd_cancel(priv->pd_txtimeout); @@ -1144,9 +1200,34 @@ static void pic32mx_txdone(struct pic32mx_driver_s *priv) * is, this descriptor is now under software control and the message was * transmitted. Use TSV to check for the transmission result. */ -#warning "Missing logic" -#warning "The rest is residual LPC17xx logic that needs to be removed" + for (i = 0; i < CONFIG_NET_NTXDESC; i++) + { + txdesc = &priv->pd_txdesc[i]; + + /* Check if software owns this descriptor */ + + if ((txdesc->status & TXDESC_STATUS_EOWN) == 0) + { + /* Yes.. Check if there is a buffer attached? */ + + if (txdesc->address != 0) + { + /* Reset status */ + + txdesc->status = TXDESC_STATUS_SOWN; + txdesc->tsv1 = 0; + txdesc->tsv2 = 0; + + /* Free the TX buffer */ + + pic32mx_freebuffer(priv, (uint8_t *)VIRT_ADDR(txdesc->address)); + txdesc->address = 0; + } + } + txdesc += TXDESC_SIZE; + } + /* Check if there is a pending Tx transfer that was scheduled by Rx handling * while the Tx logic was busy. If so, processing that pending Tx now. */ @@ -1168,7 +1249,24 @@ static void pic32mx_txdone(struct pic32mx_driver_s *priv) else { - (void)uip_poll(&priv->pd_dev, pic32mx_uiptxpoll); + /* Assign a buffer for the poll */ + + DEBUGASSERT(priv->pd_dev.d_buf == NULL); + priv->pd_dev.d_buf = pic32mx_allocbuffer(priv); + if (priv->pd_dev.d_buf) + { + /* And perform the poll */ + + (void)uip_poll(&priv->pd_dev, pic32mx_uiptxpoll); + + /* Free any buffer left attached after the poll */ + + if (priv->pd_dev.d_buf != NULL) + { + pic32mx_freebuffer(priv, priv->pd_dev.d_buf); + priv->pd_dev.d_buf = NULL; + } + } } } @@ -1258,7 +1356,6 @@ static int pic32mx_interrupt(int irq, void *context) * or by writing the BUFCDEC bit to decrement the BUFCNT counter. * Writing a ‘0’ or a ‘1’ has no effect. */ -#warning "Missing logic" /* RXDONE: Receive Done Interrupt. This bit is set whenever an RX packet * is successfully received. It is cleared by either a Reset or CPU @@ -1342,9 +1439,9 @@ static int pic32mx_interrupt(int irq, void *context) /* Clear the pending interrupt */ # if CONFIG_PIC32MX_NINTERFACES > 1 - pic32mx_clrpend(priv->pd_irqsrc); + up_clrpend_irq(priv->pd_irqsrc); # else - pic32mx_clrpend(PIC32MX_IRQSRC_ETH); + up_clrpend_irq(PIC32MX_IRQSRC_ETH); # endif return OK; @@ -1384,9 +1481,20 @@ static void pic32mx_txtimeout(int argc, uint32_t arg, ...) (void)pic32mx_ifup(&priv->pd_dev); - /* Then poll uIP for new XMIT data */ + /* Then poll uIP for new XMIT data (We are guaranteed to have a free + * buffer here). + */ + priv->pd_dev.d_buf = pic32mx_allocbuffer(priv); (void)uip_poll(&priv->pd_dev, pic32mx_uiptxpoll); + + /* Free any buffer left attached after the poll */ + + if (priv->pd_dev.d_buf != NULL) + { + pic32mx_freebuffer(priv, priv->pd_dev.d_buf); + priv->pd_dev.d_buf = NULL; + } } } @@ -1423,7 +1531,22 @@ static void pic32mx_polltimer(int argc, uint32_t arg, ...) * we will missing TCP time state updates? */ - (void)uip_timer(&priv->pd_dev, pic32mx_uiptxpoll, PIC32MX_POLLHSEC); + DEBUGASSERT(priv->pd_dev.d_buf == NULL); + priv->pd_dev.d_buf = pic32mx_allocbuffer(priv); + if (priv->pd_dev.d_buf != NULL) + { + /* And perform the poll */ + + (void)uip_timer(&priv->pd_dev, pic32mx_uiptxpoll, PIC32MX_POLLHSEC); + + /* Free any buffer left attached after the poll */ + + if (priv->pd_dev.d_buf != NULL) + { + pic32mx_freebuffer(priv, priv->pd_dev.d_buf); + priv->pd_dev.d_buf = NULL; + } + } } /* Setup the watchdog poll timer again */ @@ -1585,7 +1708,7 @@ static int pic32mx_ifup(struct uip_driver_s *dev) * length restriction is desired, program this 16-bit field. */ - pic32mx_putreg(PIC32MX_MAXPACKET_SIZE, PIC32MX_EMAC1_MAXF); + pic32mx_putreg(CONFIG_NET_BUFSIZE, PIC32MX_EMAC1_MAXF); /* Configure the MAC station address in the EMAC1SA0, EMAC1SA1 and * EMAC1SA2 registers (these registers are loaded at reset from the @@ -1641,6 +1764,10 @@ static int pic32mx_ifup(struct uip_driver_s *dev) */ #warning "Missing logic" + /* Initialize the buffer list */ + + pic32mx_bufferinit(priv); + /* Initialize the TX descriptor list */ pic32mx_txdescinit(priv); @@ -1827,9 +1954,26 @@ static int pic32mx_txavail(struct uip_driver_s *dev) if (pic32mx_txdesc(priv) != NULL) { - /* If so, then poll uIP for new XMIT data */ + /* If so, then poll uIP for new XMIT data. First allocate a buffer + * to perform the poll + */ - (void)uip_poll(&priv->pd_dev, pic32mx_uiptxpoll); + DEBUGASSERT(priv->pd_dev.d_buf == NULL); + priv->pd_dev.d_buf = pic32mx_allocbuffer(priv); + if (priv->pd_dev.d_buf) + { + /* And perform the poll */ + + (void)uip_poll(&priv->pd_dev, pic32mx_uiptxpoll); + + /* Free any buffer left attached after the poll */ + + if (priv->pd_dev.d_buf != NULL) + { + pic32mx_freebuffer(priv, priv->pd_dev.d_buf); + priv->pd_dev.d_buf = NULL; + } + } } } @@ -2222,7 +2366,7 @@ static inline int pic32mx_phyinit(struct pic32mx_driver_s *priv) /* Enter RMII mode and select 100 MBPS support */ pic32mx_putreg(ETH_CMD_RMII, PIC32MX_ETH_CMD); - pic32mx_putreg(EMAC1_SUPP_SPEEDRMII:, PIC32MX_ETH_SUPP); + pic32mx_putreg(EMAC1_SUPP_SPEEDRMII, PIC32MX_ETH_SUPP); /* Find PHY Address. Because the controller has a pull-up and the * PHY has pull-down resistors on RXD lines some times the PHY @@ -2557,7 +2701,6 @@ static void pic32mx_macmode(uint8_t mode) static void pic32mx_ethreset(struct pic32mx_driver_s *priv) { - uint32_t regval; irqstate_t flags; /* Reset the MAC */ @@ -2646,9 +2789,7 @@ static inline int pic32mx_ethinitialize(int intf) #endif { struct pic32mx_driver_s *priv; - uint32_t regval; int ret; - int i; DEBUGASSERT(intf < CONFIG_PIC32MX_NINTERFACES); priv = &g_ethdrvr[intf]; diff --git a/nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.h b/nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.h index 29735f3c5..f909c5974 100644 --- a/nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.h +++ b/nuttx/arch/mips/src/pic32mx/pic32mx-ethernet.h @@ -727,8 +727,8 @@ #define PIC32MX_TXDESC_ADDRESS 0x04 /* Data buffer address (32-bits) */ #define PIC32MX_TXDESC_TSV1 0x08 /* Transmit filter status vector 1 (32-bits) */ #define PIC32MX_TXDESC_TSV2 0x0c /* Transmit filter status vector 2 (32-bits) */ -#define PIC32MX_TXDESC_NEXTED 0x10 /* Size in bytes of one Tx descriptor */ -#define PIC32MX_TXDESC_SIZE 0x14 +#define PIC32MX_TXDESC_NEXTED 0x10 /* Next Ethernet Descriptor (ED) */ +#define PIC32MX_TXDESC_SIZE 0x14 /* Size in bytes of one Tx descriptor */ /* Tx descriptor uint32_t* indices */ @@ -736,8 +736,8 @@ #define TXDESC_ADDRESS 1 /* Data buffer address (32-bits) */ #define TXDESC_TSV1 2 /* Transmit filter status vector 1 (32-bits) */ #define TXDESC_TSV2 3 /* Transmit filter status vector 2 (32-bits) */ -#define TXDESC_NEXTED 4 /* Size in bytes of one Tx descriptor */ -#define TXDESC_SIZE 5 +#define TXDESC_NEXTED 4 /* Next Ethernet Descriptor (ED) */ +#define TXDESC_SIZE 5 /* Size in 32-bit words of one Tx descriptor */ /* Rx descriptor offsets */ @@ -745,8 +745,8 @@ #define PIC32MX_RXDESC_ADDRESS 0x04 /* Data buffer address (32-bits) */ #define PIC32MX_RXDESC_RSV1 0x08 /* Receive filter status vector 1 and checksum (32-bits) */ #define PIC32MX_RXDESC_RSV2 0x0c /* Receive filter status vector 2 (32-bits) */ -#define PIC32MX_RXDESC_NEXTED 0x10 /* Size in bytes of one Tx descriptor */ -#define PIC32MX_RXDESC_SIZE 0x14 +#define PIC32MX_RXDESC_NEXTED 0x10 /* Next Ethernet Descriptor (ED) */ +#define PIC32MX_RXDESC_SIZE 0x14 /* Size in bytes of one Tx descriptor */ /* Rx descriptor offsets uint32_t* indices */ @@ -754,8 +754,8 @@ #define RXDESC_ADDRESS 1 /* Data buffer address (32-bits) */ #define RXDESC_RSV1 2 /* Receive filter status vector 1 and checksum (32-bits) */ #define RXDESC_RSV2 3 /* Receive filter status vector 2 (32-bits) */ -#define RXDESC_NEXTED 4 /* Size in bytes of one Tx descriptor */ -#define RXDESC_SIZE 5 +#define RXDESC_NEXTED 4 /* Next Ethernet Descriptor (ED) */ +#define RXDESC_SIZE 5 /* Size in 32-bit words of one Tx descriptor */ /* Descriptor Bit Definitions ***************************************************************/ /* Tx descriptor status bit definitions */ @@ -853,6 +853,26 @@ #ifndef __ASSEMBLY__ +/* Descriptors as structures */ + +struct pic32mx_txdesc_s +{ + uint32_t status; /* Various status bits (32-bits) */ + uint32_t address; /* Data buffer address (32-bits) */ + uint32_t tsv1; /* Transmit filter status vector 1 (32-bits) */ + uint32_t tsv2; /* Transmit filter status vector 2 (32-bits) */ + uint32_t nexted; /* Next Ethernet Descriptor (ED) */ +}; + +struct pic32mx_rxdesc_s +{ + uint32_t status; /* Various status bits (32-bits) */ + uint32_t address; /* Data buffer address (32-bits) */ + uint32_t rsv1; /* Receive filter status vector 1 and checksum (32-bits) */ + uint32_t rsv2; /* Receive filter status vector 2 (32-bits) */ + uint32_t nexted; /* Next Ethernet Descriptor (ED) */ +}; + /******************************************************************************************** * Inline Functions ********************************************************************************************/ |