tc35815: Kill unused code
- TC35815_DMA_SYNC_ONDEMAND is always enabled. - WORKAROUND_LOSTCAR is always enabled. - WORKAROUND_100HALF_PROMISC is always enabled. - GATHER_TXINT is always enabled. - TC35815_USE_PACKEDBUFFER is always disabled. - NO_CHECK_CARRIER is always disabled. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Atsushi Nemoto
David S. Miller
Родитель
c6a2dbbade
Коммит
a02b7b7a13
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@ -50,13 +50,6 @@ static const char *version = "tc35815.c:v" DRV_VERSION "\n";
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#include <asm/io.h>
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#include <asm/byteorder.h>
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/* First, a few definitions that the brave might change. */
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#define GATHER_TXINT /* On-Demand Tx Interrupt */
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#define WORKAROUND_LOSTCAR
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#define WORKAROUND_100HALF_PROMISC
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/* #define TC35815_USE_PACKEDBUFFER */
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enum tc35815_chiptype {
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TC35815CF = 0,
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TC35815_NWU,
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@ -326,17 +319,10 @@ struct BDesc {
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/* Some useful constants. */
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#undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
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#ifdef NO_CHECK_CARRIER
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#define TX_CTL_CMD (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
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Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
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Tx_En) /* maybe 0x7b01 */
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#else
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#define TX_CTL_CMD (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
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#define TX_CTL_CMD (Tx_EnTxPar | Tx_EnLateColl | \
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Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
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Tx_En) /* maybe 0x7b01 */
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#endif
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/* Do not use Rx_StripCRC -- it causes trouble on BLEx/FDAEx condition */
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#define RX_CTL_CMD (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
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| Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn) /* maybe 0x6f01 */
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@ -357,13 +343,6 @@ struct BDesc {
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#define TX_THRESHOLD_KEEP_LIMIT 10
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/* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
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#ifdef TC35815_USE_PACKEDBUFFER
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#define FD_PAGE_NUM 2
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#define RX_BUF_NUM 8 /* >= 2 */
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#define RX_FD_NUM 250 /* >= 32 */
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#define TX_FD_NUM 128
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#define RX_BUF_SIZE PAGE_SIZE
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#else /* TC35815_USE_PACKEDBUFFER */
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#define FD_PAGE_NUM 4
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#define RX_BUF_NUM 128 /* < 256 */
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#define RX_FD_NUM 256 /* >= 32 */
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@ -377,7 +356,6 @@ struct BDesc {
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#define RX_BUF_SIZE \
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L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN + NET_IP_ALIGN)
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#endif
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#endif /* TC35815_USE_PACKEDBUFFER */
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#define RX_FD_RESERVE (2 / 2) /* max 2 BD per RxFD */
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#define NAPI_WEIGHT 16
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@ -435,11 +413,7 @@ struct tc35815_local {
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/*
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* Transmitting: Batch Mode.
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* 1 BD in 1 TxFD.
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* Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
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* 1 circular FD for Free Buffer List.
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* RX_BUF_NUM BD in Free Buffer FD.
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* One Free Buffer BD has PAGE_SIZE data buffer.
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* Or Non-Packing Mode.
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* Receiving: Non-Packing Mode.
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* 1 circular FD for Free Buffer List.
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* RX_BUF_NUM BD in Free Buffer FD.
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* One Free Buffer BD has ETH_FRAME_LEN data buffer.
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@ -453,21 +427,11 @@ struct tc35815_local {
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struct RxFD *rfd_limit;
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struct RxFD *rfd_cur;
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struct FrFD *fbl_ptr;
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#ifdef TC35815_USE_PACKEDBUFFER
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unsigned char fbl_curid;
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void *data_buf[RX_BUF_NUM]; /* packing */
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dma_addr_t data_buf_dma[RX_BUF_NUM];
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struct {
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struct sk_buff *skb;
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dma_addr_t skb_dma;
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} tx_skbs[TX_FD_NUM];
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#else
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unsigned int fbl_count;
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struct {
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struct sk_buff *skb;
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dma_addr_t skb_dma;
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} tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
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#endif
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u32 msg_enable;
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enum tc35815_chiptype chiptype;
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};
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@ -482,51 +446,6 @@ static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
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return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
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}
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#endif
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#ifdef TC35815_USE_PACKEDBUFFER
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static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
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{
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int i;
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for (i = 0; i < RX_BUF_NUM; i++) {
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if (bus >= lp->data_buf_dma[i] &&
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bus < lp->data_buf_dma[i] + PAGE_SIZE)
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return (void *)((u8 *)lp->data_buf[i] +
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(bus - lp->data_buf_dma[i]));
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}
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return NULL;
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}
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#define TC35815_DMA_SYNC_ONDEMAND
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static void *alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
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{
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#ifdef TC35815_DMA_SYNC_ONDEMAND
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void *buf;
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/* pci_map + pci_dma_sync will be more effective than
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* pci_alloc_consistent on some archs. */
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buf = (void *)__get_free_page(GFP_ATOMIC);
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if (!buf)
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return NULL;
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*dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
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PCI_DMA_FROMDEVICE);
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if (pci_dma_mapping_error(hwdev, *dma_handle)) {
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free_page((unsigned long)buf);
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return NULL;
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}
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return buf;
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#else
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return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
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#endif
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}
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static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
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{
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#ifdef TC35815_DMA_SYNC_ONDEMAND
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pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
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free_page((unsigned long)buf);
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#else
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pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
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#endif
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}
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#else /* TC35815_USE_PACKEDBUFFER */
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static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
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struct pci_dev *hwdev,
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dma_addr_t *dma_handle)
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@ -551,7 +470,6 @@ static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_
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PCI_DMA_FROMDEVICE);
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dev_kfree_skb_any(skb);
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}
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#endif /* TC35815_USE_PACKEDBUFFER */
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/* Index to functions, as function prototypes. */
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@ -646,8 +564,6 @@ static void tc_handle_link_change(struct net_device *dev)
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* TX4939 PCFG.SPEEDn bit will be changed on
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* NETDEV_CHANGE event.
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*/
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#if !defined(NO_CHECK_CARRIER) && defined(WORKAROUND_LOSTCAR)
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/*
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* WORKAROUND: enable LostCrS only if half duplex
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* operation.
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@ -657,7 +573,6 @@ static void tc_handle_link_change(struct net_device *dev)
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lp->chiptype != TC35815_TX4939)
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tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
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&tr->Tx_Ctl);
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#endif
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lp->speed = phydev->speed;
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lp->duplex = phydev->duplex;
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@ -666,11 +581,9 @@ static void tc_handle_link_change(struct net_device *dev)
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if (phydev->link != lp->link) {
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if (phydev->link) {
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#ifdef WORKAROUND_100HALF_PROMISC
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/* delayed promiscuous enabling */
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if (dev->flags & IFF_PROMISC)
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tc35815_set_multicast_list(dev);
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#endif
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} else {
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lp->speed = 0;
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lp->duplex = -1;
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@ -997,25 +910,6 @@ tc35815_init_queues(struct net_device *dev)
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if (!lp->fd_buf)
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return -ENOMEM;
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for (i = 0; i < RX_BUF_NUM; i++) {
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#ifdef TC35815_USE_PACKEDBUFFER
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lp->data_buf[i] =
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alloc_rxbuf_page(lp->pci_dev,
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&lp->data_buf_dma[i]);
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if (!lp->data_buf[i]) {
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while (--i >= 0) {
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free_rxbuf_page(lp->pci_dev,
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lp->data_buf[i],
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lp->data_buf_dma[i]);
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lp->data_buf[i] = NULL;
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}
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pci_free_consistent(lp->pci_dev,
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PAGE_SIZE * FD_PAGE_NUM,
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lp->fd_buf,
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lp->fd_buf_dma);
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lp->fd_buf = NULL;
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return -ENOMEM;
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}
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#else
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lp->rx_skbs[i].skb =
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alloc_rxbuf_skb(dev, lp->pci_dev,
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&lp->rx_skbs[i].skb_dma);
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@ -1033,15 +927,9 @@ tc35815_init_queues(struct net_device *dev)
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lp->fd_buf = NULL;
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return -ENOMEM;
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}
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#endif
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}
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printk(KERN_DEBUG "%s: FD buf %p DataBuf",
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dev->name, lp->fd_buf);
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#ifdef TC35815_USE_PACKEDBUFFER
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printk(" DataBuf");
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for (i = 0; i < RX_BUF_NUM; i++)
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printk(" %p", lp->data_buf[i]);
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#endif
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printk("\n");
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} else {
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for (i = 0; i < FD_PAGE_NUM; i++)
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@ -1074,7 +962,6 @@ tc35815_init_queues(struct net_device *dev)
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lp->fbl_ptr = (struct FrFD *)fd_addr;
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lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
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lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
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#ifndef TC35815_USE_PACKEDBUFFER
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/*
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* move all allocated skbs to head of rx_skbs[] array.
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* fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
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@ -1092,11 +979,7 @@ tc35815_init_queues(struct net_device *dev)
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lp->fbl_count++;
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}
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}
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#endif
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for (i = 0; i < RX_BUF_NUM; i++) {
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#ifdef TC35815_USE_PACKEDBUFFER
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lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
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#else
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if (i >= lp->fbl_count) {
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lp->fbl_ptr->bd[i].BuffData = 0;
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lp->fbl_ptr->bd[i].BDCtl = 0;
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@ -1104,15 +987,11 @@ tc35815_init_queues(struct net_device *dev)
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}
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lp->fbl_ptr->bd[i].BuffData =
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cpu_to_le32(lp->rx_skbs[i].skb_dma);
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#endif
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/* BDID is index of FrFD.bd[] */
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lp->fbl_ptr->bd[i].BDCtl =
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cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
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RX_BUF_SIZE);
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}
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#ifdef TC35815_USE_PACKEDBUFFER
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lp->fbl_curid = 0;
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#endif
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printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
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dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
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@ -1186,19 +1065,11 @@ tc35815_free_queues(struct net_device *dev)
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lp->fbl_ptr = NULL;
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for (i = 0; i < RX_BUF_NUM; i++) {
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#ifdef TC35815_USE_PACKEDBUFFER
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if (lp->data_buf[i]) {
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free_rxbuf_page(lp->pci_dev,
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lp->data_buf[i], lp->data_buf_dma[i]);
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lp->data_buf[i] = NULL;
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}
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#else
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if (lp->rx_skbs[i].skb) {
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free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
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lp->rx_skbs[i].skb_dma);
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lp->rx_skbs[i].skb = NULL;
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}
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#endif
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}
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if (lp->fd_buf) {
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pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
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@ -1244,7 +1115,7 @@ dump_rxfd(struct RxFD *fd)
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return bd_count;
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}
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#if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
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#ifdef DEBUG
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static void
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dump_frfd(struct FrFD *fd)
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{
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@ -1261,9 +1132,7 @@ dump_frfd(struct FrFD *fd)
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le32_to_cpu(fd->bd[i].BDCtl));
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printk("\n");
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}
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#endif
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#ifdef DEBUG
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static void
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panic_queues(struct net_device *dev)
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{
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@ -1466,9 +1335,7 @@ static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
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(struct tc35815_regs __iomem *)dev->base_addr;
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/* Start DMA Transmitter. */
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txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
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#ifdef GATHER_TXINT
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txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
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#endif
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if (netif_msg_tx_queued(lp)) {
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printk("%s: starting TxFD.\n", dev->name);
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dump_txfd(txfd);
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@ -1640,50 +1507,9 @@ tc35815_rx(struct net_device *dev, int limit)
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struct sk_buff *skb;
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unsigned char *data;
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int cur_bd;
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#ifdef TC35815_USE_PACKEDBUFFER
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int offset;
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#endif
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if (--limit < 0)
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break;
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#ifdef TC35815_USE_PACKEDBUFFER
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BUG_ON(bd_count > 2);
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skb = dev_alloc_skb(pkt_len + NET_IP_ALIGN);
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if (skb == NULL) {
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printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
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dev->name);
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dev->stats.rx_dropped++;
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break;
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}
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skb_reserve(skb, NET_IP_ALIGN);
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data = skb_put(skb, pkt_len);
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/* copy from receive buffer */
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cur_bd = 0;
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offset = 0;
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while (offset < pkt_len && cur_bd < bd_count) {
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int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
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BD_BuffLength_MASK;
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dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
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void *rxbuf = rxbuf_bus_to_virt(lp, dma);
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if (offset + len > pkt_len)
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len = pkt_len - offset;
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#ifdef TC35815_DMA_SYNC_ONDEMAND
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pci_dma_sync_single_for_cpu(lp->pci_dev,
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dma, len,
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PCI_DMA_FROMDEVICE);
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#endif
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memcpy(data + offset, rxbuf, len);
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#ifdef TC35815_DMA_SYNC_ONDEMAND
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pci_dma_sync_single_for_device(lp->pci_dev,
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dma, len,
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PCI_DMA_FROMDEVICE);
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#endif
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offset += len;
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cur_bd++;
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}
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#else /* TC35815_USE_PACKEDBUFFER */
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BUG_ON(bd_count > 1);
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cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
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& BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
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@ -1711,7 +1537,6 @@ tc35815_rx(struct net_device *dev, int limit)
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memmove(skb->data, skb->data - NET_IP_ALIGN,
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pkt_len);
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data = skb_put(skb, pkt_len);
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#endif /* TC35815_USE_PACKEDBUFFER */
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if (netif_msg_pktdata(lp))
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print_eth(data);
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skb->protocol = eth_type_trans(skb, dev);
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@ -1753,19 +1578,11 @@ tc35815_rx(struct net_device *dev, int limit)
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BUG_ON(id >= RX_BUF_NUM);
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#endif
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/* free old buffers */
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#ifdef TC35815_USE_PACKEDBUFFER
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while (lp->fbl_curid != id)
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#else
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lp->fbl_count--;
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while (lp->fbl_count < RX_BUF_NUM)
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#endif
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{
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#ifdef TC35815_USE_PACKEDBUFFER
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unsigned char curid = lp->fbl_curid;
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#else
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unsigned char curid =
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(id + 1 + lp->fbl_count) % RX_BUF_NUM;
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#endif
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struct BDesc *bd = &lp->fbl_ptr->bd[curid];
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#ifdef DEBUG
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bdctl = le32_to_cpu(bd->BDCtl);
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@ -1776,7 +1593,6 @@ tc35815_rx(struct net_device *dev, int limit)
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}
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#endif
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/* pass BD to controller */
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#ifndef TC35815_USE_PACKEDBUFFER
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if (!lp->rx_skbs[curid].skb) {
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lp->rx_skbs[curid].skb =
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alloc_rxbuf_skb(dev,
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@ -1786,21 +1602,11 @@ tc35815_rx(struct net_device *dev, int limit)
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break; /* try on next reception */
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bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
|
||||
}
|
||||
#endif /* TC35815_USE_PACKEDBUFFER */
|
||||
/* Note: BDLength was modified by chip. */
|
||||
bd->BDCtl = cpu_to_le32(BD_CownsBD |
|
||||
(curid << BD_RxBDID_SHIFT) |
|
||||
RX_BUF_SIZE);
|
||||
#ifdef TC35815_USE_PACKEDBUFFER
|
||||
lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
|
||||
if (netif_msg_rx_status(lp)) {
|
||||
printk("%s: Entering new FBD %d\n",
|
||||
dev->name, lp->fbl_curid);
|
||||
dump_frfd(lp->fbl_ptr);
|
||||
}
|
||||
#else
|
||||
lp->fbl_count++;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1872,11 +1678,7 @@ static int tc35815_poll(struct napi_struct *napi, int budget)
|
|||
return received;
|
||||
}
|
||||
|
||||
#ifdef NO_CHECK_CARRIER
|
||||
#define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
|
||||
#else
|
||||
#define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
|
||||
#endif
|
||||
|
||||
static void
|
||||
tc35815_check_tx_stat(struct net_device *dev, int status)
|
||||
|
|
@ -1890,16 +1692,12 @@ tc35815_check_tx_stat(struct net_device *dev, int status)
|
|||
if (status & Tx_TxColl_MASK)
|
||||
dev->stats.collisions += status & Tx_TxColl_MASK;
|
||||
|
||||
#ifndef NO_CHECK_CARRIER
|
||||
/* TX4939 does not have NCarr */
|
||||
if (lp->chiptype == TC35815_TX4939)
|
||||
status &= ~Tx_NCarr;
|
||||
#ifdef WORKAROUND_LOSTCAR
|
||||
/* WORKAROUND: ignore LostCrS in full duplex operation */
|
||||
if (!lp->link || lp->duplex == DUPLEX_FULL)
|
||||
status &= ~Tx_NCarr;
|
||||
#endif
|
||||
#endif
|
||||
|
||||
if (!(status & TX_STA_ERR)) {
|
||||
/* no error. */
|
||||
|
|
@ -1929,12 +1727,10 @@ tc35815_check_tx_stat(struct net_device *dev, int status)
|
|||
dev->stats.tx_fifo_errors++;
|
||||
msg = "Excessive Deferral.";
|
||||
}
|
||||
#ifndef NO_CHECK_CARRIER
|
||||
if (status & Tx_NCarr) {
|
||||
dev->stats.tx_carrier_errors++;
|
||||
msg = "Lost Carrier Sense.";
|
||||
}
|
||||
#endif
|
||||
if (status & Tx_LateColl) {
|
||||
dev->stats.tx_aborted_errors++;
|
||||
msg = "Late Collision.";
|
||||
|
|
@ -2025,9 +1821,7 @@ tc35815_txdone(struct net_device *dev)
|
|||
|
||||
/* start DMA Transmitter again */
|
||||
txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
|
||||
#ifdef GATHER_TXINT
|
||||
txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
|
||||
#endif
|
||||
if (netif_msg_tx_queued(lp)) {
|
||||
printk("%s: start TxFD on queue.\n",
|
||||
dev->name);
|
||||
|
|
@ -2138,14 +1932,12 @@ tc35815_set_multicast_list(struct net_device *dev)
|
|||
(struct tc35815_regs __iomem *)dev->base_addr;
|
||||
|
||||
if (dev->flags & IFF_PROMISC) {
|
||||
#ifdef WORKAROUND_100HALF_PROMISC
|
||||
/* With some (all?) 100MHalf HUB, controller will hang
|
||||
* if we enabled promiscuous mode before linkup... */
|
||||
struct tc35815_local *lp = netdev_priv(dev);
|
||||
|
||||
if (!lp->link)
|
||||
return;
|
||||
#endif
|
||||
/* Enable promiscuous mode */
|
||||
tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
|
||||
} else if ((dev->flags & IFF_ALLMULTI) ||
|
||||
|
|
@ -2332,9 +2124,6 @@ static void tc35815_chip_init(struct net_device *dev)
|
|||
tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
|
||||
else
|
||||
tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
|
||||
#ifdef TC35815_USE_PACKEDBUFFER
|
||||
tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize); /* Packing */
|
||||
#endif
|
||||
tc_writel(0, &tr->TxPollCtr); /* Batch mode */
|
||||
tc_writel(TX_THRESHOLD, &tr->TxThrsh);
|
||||
tc_writel(INT_EN_CMD, &tr->Int_En);
|
||||
|
|
@ -2352,19 +2141,12 @@ static void tc35815_chip_init(struct net_device *dev)
|
|||
tc_writel(RX_CTL_CMD, &tr->Rx_Ctl); /* start MAC receiver */
|
||||
|
||||
/* start MAC transmitter */
|
||||
#ifndef NO_CHECK_CARRIER
|
||||
/* TX4939 does not have EnLCarr */
|
||||
if (lp->chiptype == TC35815_TX4939)
|
||||
txctl &= ~Tx_EnLCarr;
|
||||
#ifdef WORKAROUND_LOSTCAR
|
||||
/* WORKAROUND: ignore LostCrS in full duplex operation */
|
||||
if (!lp->phy_dev || !lp->link || lp->duplex == DUPLEX_FULL)
|
||||
txctl &= ~Tx_EnLCarr;
|
||||
#endif
|
||||
#endif /* !NO_CHECK_CARRIER */
|
||||
#ifdef GATHER_TXINT
|
||||
txctl &= ~Tx_EnComp; /* disable global tx completion int. */
|
||||
#endif
|
||||
tc_writel(txctl, &tr->Tx_Ctl);
|
||||
}
|
||||
|
||||
|
|
|
|||
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