diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/pasemi_mac.c | 480 | ||||
| -rw-r--r-- | drivers/net/pasemi_mac.h | 16 |
2 files changed, 210 insertions, 286 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c index 8319bc1..a50eb34 100644 --- a/drivers/net/pasemi_mac.c +++ b/drivers/net/pasemi_mac.c @@ -69,9 +69,9 @@ NETIF_MSG_RX_ERR | \ NETIF_MSG_TX_ERR) -#define TX_DESC(tx, num) ((tx)->ring[(num) & (TX_RING_SIZE-1)]) +#define TX_DESC(tx, num) ((tx)->chan.ring_virt[(num) & (TX_RING_SIZE-1)]) #define TX_DESC_INFO(tx, num) ((tx)->ring_info[(num) & (TX_RING_SIZE-1)]) -#define RX_DESC(rx, num) ((rx)->ring[(num) & (RX_RING_SIZE-1)]) +#define RX_DESC(rx, num) ((rx)->chan.ring_virt[(num) & (RX_RING_SIZE-1)]) #define RX_DESC_INFO(rx, num) ((rx)->ring_info[(num) & (RX_RING_SIZE-1)]) #define RX_BUFF(rx, num) ((rx)->buffers[(num) & (RX_RING_SIZE-1)]) @@ -89,8 +89,6 @@ static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */ module_param(debug, int, 0); MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value"); -static struct pasdma_status *dma_status; - static int translation_enabled(void) { #if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE) @@ -100,32 +98,30 @@ static int translation_enabled(void) #endif } -static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg, - unsigned int val) +static void write_iob_reg(unsigned int reg, unsigned int val) { - out_le32(mac->iob_regs+reg, val); + pasemi_write_iob_reg(reg, val); } static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg) { - return in_le32(mac->regs+reg); + return pasemi_read_mac_reg(mac->dma_if, reg); } static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg, unsigned int val) { - out_le32(mac->regs+reg, val); + pasemi_write_mac_reg(mac->dma_if, reg, val); } -static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg) +static unsigned int read_dma_reg(unsigned int reg) { - return in_le32(mac->dma_regs+reg); + return pasemi_read_dma_reg(reg); } -static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg, - unsigned int val) +static void write_dma_reg(unsigned int reg, unsigned int val) { - out_le32(mac->dma_regs+reg, val); + pasemi_write_dma_reg(reg, val); } static struct pasemi_mac_rxring *rx_ring(struct pasemi_mac *mac) @@ -138,6 +134,34 @@ static struct pasemi_mac_txring *tx_ring(struct pasemi_mac *mac) return mac->tx; } +static int mac_to_intf(struct pasemi_mac *mac) +{ + struct pci_dev *pdev = mac->pdev; + u32 tmp; + int nintf, off, i, j; + int devfn = pdev->devfn; + + tmp = read_dma_reg(PAS_DMA_CAP_IFI); + nintf = (tmp & PAS_DMA_CAP_IFI_NIN_M) >> PAS_DMA_CAP_IFI_NIN_S; + off = (tmp & PAS_DMA_CAP_IFI_IOFF_M) >> PAS_DMA_CAP_IFI_IOFF_S; + + /* IOFF contains the offset to the registers containing the + * DMA interface-to-MAC-pci-id mappings, and NIN contains number + * of total interfaces. Each register contains 4 devfns. + * Just do a linear search until we find the devfn of the MAC + * we're trying to look up. + */ + + for (i = 0; i < (nintf+3)/4; i++) { + tmp = read_dma_reg(off+4*i); + for (j = 0; j < 4; j++) { + if (((tmp >> (8*j)) & 0xff) == devfn) + return i*4 + j; + } + } + return -1; +} + static int pasemi_get_mac_addr(struct pasemi_mac *mac) { struct pci_dev *pdev = mac->pdev; @@ -213,13 +237,17 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev) { struct pasemi_mac_rxring *ring; struct pasemi_mac *mac = netdev_priv(dev); - int chan_id = mac->dma_rxch; + int chno; unsigned int cfg; - ring = kzalloc(sizeof(*ring), GFP_KERNEL); + ring = pasemi_dma_alloc_chan(RXCHAN, sizeof(struct pasemi_mac_rxring), + offsetof(struct pasemi_mac_rxring, chan)); - if (!ring) - goto out_ring; + if (!ring) { + dev_err(&mac->pdev->dev, "Can't allocate RX channel\n"); + goto out_chan; + } + chno = ring->chan.chno; spin_lock_init(&ring->lock); @@ -231,84 +259,80 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev) goto out_ring_info; /* Allocate descriptors */ - ring->ring = dma_alloc_coherent(&mac->dma_pdev->dev, - RX_RING_SIZE * sizeof(u64), - &ring->dma, GFP_KERNEL); - - if (!ring->ring) + if (pasemi_dma_alloc_ring(&ring->chan, RX_RING_SIZE)) goto out_ring_desc; - memset(ring->ring, 0, RX_RING_SIZE * sizeof(u64)); - ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64), &ring->buf_dma, GFP_KERNEL); if (!ring->buffers) - goto out_buffers; + goto out_ring_desc; memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64)); - write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma)); + write_dma_reg(PAS_DMA_RXCHAN_BASEL(chno), + PAS_DMA_RXCHAN_BASEL_BRBL(ring->chan.ring_dma)); - write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id), - PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) | - PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3)); + write_dma_reg(PAS_DMA_RXCHAN_BASEU(chno), + PAS_DMA_RXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32) | + PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3)); - cfg = PAS_DMA_RXCHAN_CFG_HBU(2); + cfg = PAS_DMA_RXCHAN_CFG_HBU(1); if (translation_enabled()) cfg |= PAS_DMA_RXCHAN_CFG_CTR; - write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id), cfg); + write_dma_reg(PAS_DMA_RXCHAN_CFG(chno), cfg); - write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if), - PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma)); + write_dma_reg(PAS_DMA_RXINT_BASEL(mac->dma_if), + PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma)); - write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if), - PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) | - PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3)); + write_dma_reg(PAS_DMA_RXINT_BASEU(mac->dma_if), + PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) | + PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3)); - cfg = PAS_DMA_RXINT_CFG_DHL(3) | PAS_DMA_RXINT_CFG_L2 | + cfg = PAS_DMA_RXINT_CFG_DHL(1) | PAS_DMA_RXINT_CFG_L2 | PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP | PAS_DMA_RXINT_CFG_HEN; if (translation_enabled()) cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR; - write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if), cfg); + write_dma_reg(PAS_DMA_RXINT_CFG(mac->dma_if), cfg); ring->next_to_fill = 0; ring->next_to_clean = 0; - - ring->status = &dma_status->rx_sta[mac->dma_rxch]; ring->mac = mac; mac->rx = ring; return 0; -out_buffers: - dma_free_coherent(&mac->dma_pdev->dev, - RX_RING_SIZE * sizeof(u64), - rx_ring(mac)->ring, rx_ring(mac)->dma); out_ring_desc: kfree(ring->ring_info); out_ring_info: - kfree(ring); -out_ring: + pasemi_dma_free_chan(&ring->chan); +out_chan: return -ENOMEM; } static struct pasemi_mac_txring * -pasemi_mac_setup_tx_resources(struct net_device *dev, int txch) +pasemi_mac_setup_tx_resources(struct net_device *dev) { struct pasemi_mac *mac = netdev_priv(dev); u32 val; struct pasemi_mac_txring *ring; unsigned int cfg; + int chno; - ring = kzalloc(sizeof(*ring), GFP_KERNEL); - if (!ring) - goto out_ring; + ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_txring), + offsetof(struct pasemi_mac_txring, chan)); + + if (!ring) { + dev_err(&mac->pdev->dev, "Can't allocate TX channel\n"); + goto out_chan; + } + + chno = ring->chan.chno; spin_lock_init(&ring->lock); @@ -319,20 +343,15 @@ pasemi_mac_setup_tx_resources(struct net_device *dev, int txch) goto out_ring_info; /* Allocate descriptors */ - ring->ring = dma_alloc_coherent(&mac->dma_pdev->dev, - TX_RING_SIZE * sizeof(u64), - &ring->dma, GFP_KERNEL); - if (!ring->ring) + if (pasemi_dma_alloc_ring(&ring->chan, TX_RING_SIZE)) goto out_ring_desc; - memset(ring->ring, 0, TX_RING_SIZE * sizeof(u64)); - - write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(txch), - PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma)); - val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32); + write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno), + PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma)); + val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32); val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3); - write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(txch), val); + write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val); cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE | PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) | @@ -342,12 +361,10 @@ pasemi_mac_setup_tx_resources(struct net_device *dev, int txch) if (translation_enabled()) cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR; - write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(txch), cfg); + write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg); ring->next_to_fill = 0; ring->next_to_clean = 0; - ring->status = &dma_status->tx_sta[txch]; - ring->chan = txch; ring->mac = mac; return ring; @@ -355,8 +372,8 @@ pasemi_mac_setup_tx_resources(struct net_device *dev, int txch) out_ring_desc: kfree(ring->ring_info); out_ring_info: - kfree(ring); -out_ring: + pasemi_dma_free_chan(&ring->chan); +out_chan: return NULL; } @@ -387,15 +404,9 @@ static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac) freed = 2; } - for (i = 0; i < TX_RING_SIZE; i++) - txring->ring[i] = 0; - - dma_free_coherent(&mac->dma_pdev->dev, - TX_RING_SIZE * sizeof(u64), - txring->ring, txring->dma); - kfree(txring->ring_info); - kfree(txring); + pasemi_dma_free_chan(&txring->chan); + } static void pasemi_mac_free_rx_resources(struct pasemi_mac *mac) @@ -420,15 +431,11 @@ static void pasemi_mac_free_rx_resources(struct pasemi_mac *mac) for (i = 0; i < RX_RING_SIZE; i++) RX_DESC(rx, i) = 0; - dma_free_coherent(&mac->dma_pdev->dev, - RX_RING_SIZE * sizeof(u64), - rx_ring(mac)->ring, rx_ring(mac)->dma); - dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64), rx_ring(mac)->buffers, rx_ring(mac)->buf_dma); kfree(rx_ring(mac)->ring_info); - kfree(rx_ring(mac)); + pasemi_dma_free_chan(&rx_ring(mac)->chan); mac->rx = NULL; } @@ -479,7 +486,7 @@ static void pasemi_mac_replenish_rx_ring(struct net_device *dev, int limit) wmb(); - write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), count); + write_dma_reg(PAS_DMA_RXINT_INCR(mac->dma_if), count); rx_ring(mac)->next_to_fill = (rx_ring(mac)->next_to_fill + count) & (RX_RING_SIZE - 1); @@ -492,11 +499,11 @@ static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac) * ack the packet count interrupt we got in rx_intr. */ - pcnt = *rx_ring(mac)->status & PAS_STATUS_PCNT_M; + pcnt = *rx_ring(mac)->chan.status & PAS_STATUS_PCNT_M; reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC; - write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg); + write_iob_reg(PAS_IOB_DMA_RXCH_RESET(mac->rx->chan.chno), reg); } static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac) @@ -504,26 +511,27 @@ static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac) unsigned int reg, pcnt; /* Re-enable packet count interrupts */ - pcnt = *tx_ring(mac)->status & PAS_STATUS_PCNT_M; + pcnt = *tx_ring(mac)->chan.status & PAS_STATUS_PCNT_M; reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC; - write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan), reg); + write_iob_reg(PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan.chno), reg); } static inline void pasemi_mac_rx_error(struct pasemi_mac *mac, u64 macrx) { unsigned int rcmdsta, ccmdsta; + struct pasemi_dmachan *chan = &rx_ring(mac)->chan; if (!netif_msg_rx_err(mac)) return; - rcmdsta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); - ccmdsta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch)); + rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); + ccmdsta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(chan->chno)); printk(KERN_ERR "pasemi_mac: rx error. macrx %016lx, rx status %lx\n", - macrx, *rx_ring(mac)->status); + macrx, *chan->status); printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n", rcmdsta, ccmdsta); @@ -532,20 +540,22 @@ static inline void pasemi_mac_rx_error(struct pasemi_mac *mac, u64 macrx) static inline void pasemi_mac_tx_error(struct pasemi_mac *mac, u64 mactx) { unsigned int cmdsta; + struct pasemi_dmachan *chan = &tx_ring(mac)->chan; if (!netif_msg_tx_err(mac)) return; - cmdsta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch)); + cmdsta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(chan->chno)); printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016lx, "\ - "tx status 0x%016lx\n", mactx, *tx_ring(mac)->status); + "tx status 0x%016lx\n", mactx, *chan->status); printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta); } static int pasemi_mac_clean_rx(struct pasemi_mac_rxring *rx, int limit) { + struct pasemi_dmachan *chan = &rx->chan; struct pasemi_mac *mac = rx->mac; unsigned int n; int count; @@ -567,7 +577,7 @@ static int pasemi_mac_clean_rx(struct pasemi_mac_rxring *rx, int limit) macrx = RX_DESC(rx, n); if ((macrx & XCT_MACRX_E) || - (*rx_ring(mac)->status & PAS_STATUS_ERROR)) + (*chan->status & PAS_STATUS_ERROR)) pasemi_mac_rx_error(mac, macrx); if (!(macrx & XCT_MACRX_O)) @@ -648,7 +658,7 @@ next: if (n > RX_RING_SIZE) { /* Errata 5971 workaround: L2 target of headers */ - write_iob_reg(mac, PAS_IOB_COM_PKTHDRCNT, 0); + write_iob_reg(PAS_IOB_COM_PKTHDRCNT, 0); n &= (RX_RING_SIZE-1); } @@ -658,7 +668,7 @@ next: * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with * count*2. */ - write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), count << 1); + write_dma_reg(PAS_DMA_RXCHAN_INCR(mac->rx->chan.chno), count << 1); pasemi_mac_replenish_rx_ring(mac->netdev, count); @@ -672,6 +682,7 @@ next: static int pasemi_mac_clean_tx(struct pasemi_mac_txring *txring) { + struct pasemi_dmachan *chan = &txring->chan; struct pasemi_mac *mac = txring->mac; int i, j; unsigned int start, descr_count, buf_count, batch_limit; @@ -703,7 +714,7 @@ restart: struct sk_buff *skb; if ((mactx & XCT_MACTX_E) || - (*tx_ring(mac)->status & PAS_STATUS_ERROR)) + (*chan->status & PAS_STATUS_ERROR)) pasemi_mac_tx_error(mac, mactx); if (unlikely(mactx & XCT_MACTX_O)) @@ -747,11 +758,13 @@ restart: static irqreturn_t pasemi_mac_rx_intr(int irq, void *data) { - struct net_device *dev = data; - struct pasemi_mac *mac = netdev_priv(dev); + struct pasemi_mac_rxring *rxring = data; + struct pasemi_mac *mac = rxring->mac; + struct net_device *dev = mac->netdev; + struct pasemi_dmachan *chan = &rxring->chan; unsigned int reg; - if (!(*rx_ring(mac)->status & PAS_STATUS_CAUSE_M)) + if (!(*chan->status & PAS_STATUS_CAUSE_M)) return IRQ_NONE; /* Don't reset packet count so it won't fire again but clear @@ -759,16 +772,16 @@ static irqreturn_t pasemi_mac_rx_intr(int irq, void *data) */ reg = 0; - if (*rx_ring(mac)->status & PAS_STATUS_SOFT) + if (*chan->status & PAS_STATUS_SOFT) reg |= PAS_IOB_DMA_RXCH_RESET_SINTC; - if (*rx_ring(mac)->status & PAS_STATUS_ERROR) + if (*chan->status & PAS_STATUS_ERROR) reg |= PAS_IOB_DMA_RXCH_RESET_DINTC; - if (*rx_ring(mac)->status & PAS_STATUS_TIMER) + if (*chan->status & PAS_STATUS_TIMER) reg |= PAS_IOB_DMA_RXCH_RESET_TINTC; netif_rx_schedule(dev, &mac->napi); - write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg); + write_iob_reg(PAS_IOB_DMA_RXCH_RESET(chan->chno), reg); return IRQ_HANDLED; } @@ -776,24 +789,24 @@ static irqreturn_t pasemi_mac_rx_intr(int irq, void *data) static irqreturn_t pasemi_mac_tx_intr(int irq, void *data) { struct pasemi_mac_txring *txring = data; - struct pasemi_mac *mac = txring->mac; + struct pasemi_dmachan *chan = &txring->chan; unsigned int reg, pcnt; - if (!(*txring->status & PAS_STATUS_CAUSE_M)) + if (!(*chan->status & PAS_STATUS_CAUSE_M)) return IRQ_NONE; pasemi_mac_clean_tx(txring); - pcnt = *txring->status & PAS_STATUS_PCNT_M; + pcnt = *chan->status & PAS_STATUS_PCNT_M; reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC; - if (*txring->status & PAS_STATUS_SOFT) + if (*chan->status & PAS_STATUS_SOFT) reg |= PAS_IOB_DMA_TXCH_RESET_SINTC; - if (*txring->status & PAS_STATUS_ERROR) + if (*chan->status & PAS_STATUS_ERROR) reg |= PAS_IOB_DMA_TXCH_RESET_DINTC; - write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(txring->chan), reg); + write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg); return IRQ_HANDLED; } @@ -909,15 +922,14 @@ err: static int pasemi_mac_open(struct net_device *dev) { struct pasemi_mac *mac = netdev_priv(dev); - int base_irq; unsigned int flags; int ret; /* enable rx section */ - write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN); + write_dma_reg(PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN); /* enable tx section */ - write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN); + write_dma_reg(PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN); flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) | PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) | @@ -925,56 +937,53 @@ static int pasemi_mac_open(struct net_device *dev) write_mac_reg(mac, PAS_MAC_CFG_TXP, flags); - write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch), - PAS_IOB_DMA_RXCH_CFG_CNTTH(0)); - - write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch), - PAS_IOB_DMA_TXCH_CFG_CNTTH(128)); - /* 0xffffff is max value, about 16ms */ - write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG, - PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff)); + write_iob_reg(PAS_IOB_DMA_COM_TIMEOUTCFG, + PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff)); ret = pasemi_mac_setup_rx_resources(dev); if (ret) goto out_rx_resources; - mac->tx = pasemi_mac_setup_tx_resources(dev, mac->dma_txch); + mac->tx = pasemi_mac_setup_tx_resources(dev); if (!mac->tx) goto out_tx_ring; + write_iob_reg(PAS_IOB_DMA_RXCH_CFG(mac->rx->chan.chno), + PAS_IOB_DMA_RXCH_CFG_CNTTH(0)); + + write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno), + PAS_IOB_DMA_TXCH_CFG_CNTTH(128)); + write_mac_reg(mac, PAS_MAC_IPC_CHNL, - PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) | - PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch)); + PAS_MAC_IPC_CHNL_DCHNO(mac->rx->chan.chno) | + PAS_MAC_IPC_CHNL_BCH(mac->rx->chan.chno)); /* enable rx if */ - write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), - PAS_DMA_RXINT_RCMDSTA_EN | - PAS_DMA_RXINT_RCMDSTA_DROPS_M | - PAS_DMA_RXINT_RCMDSTA_BP | - PAS_DMA_RXINT_RCMDSTA_OO | - PAS_DMA_RXINT_RCMDSTA_BT); + write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), + PAS_DMA_RXINT_RCMDSTA_EN | + PAS_DMA_RXINT_RCMDSTA_DROPS_M | + PAS_DMA_RXINT_RCMDSTA_BP | + PAS_DMA_RXINT_RCMDSTA_OO | + PAS_DMA_RXINT_RCMDSTA_BT); /* enable rx channel */ - write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), - PAS_DMA_RXCHAN_CCMDSTA_EN | - PAS_DMA_RXCHAN_CCMDSTA_DU | - PAS_DMA_RXCHAN_CCMDSTA_OD | - PAS_DMA_RXCHAN_CCMDSTA_FD | - PAS_DMA_RXCHAN_CCMDSTA_DT); + pasemi_dma_start_chan(&rx_ring(mac)->chan, PAS_DMA_RXCHAN_CCMDSTA_DU | + PAS_DMA_RXCHAN_CCMDSTA_OD | + PAS_DMA_RXCHAN_CCMDSTA_FD | + PAS_DMA_RXCHAN_CCMDSTA_DT); /* enable tx channel */ - write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), - PAS_DMA_TXCHAN_TCMDSTA_EN | - PAS_DMA_TXCHAN_TCMDSTA_SZ | - PAS_DMA_TXCHAN_TCMDSTA_DB | - PAS_DMA_TXCHAN_TCMDSTA_DE | - PAS_DMA_TXCHAN_TCMDSTA_DA); + pasemi_dma_start_chan(&tx_ring(mac)->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ | + PAS_DMA_TXCHAN_TCMDSTA_DB | + PAS_DMA_TXCHAN_TCMDSTA_DE | + PAS_DMA_TXCHAN_TCMDSTA_DA); pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE); - write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), RX_RING_SIZE>>1); + write_dma_reg(PAS_DMA_RXCHAN_INCR(rx_ring(mac)->chan.chno), + RX_RING_SIZE>>1); /* Clear out any residual packet count state from firmware */ pasemi_mac_restart_rx_intr(mac); @@ -1001,37 +1010,25 @@ static int pasemi_mac_open(struct net_device *dev) netif_start_queue(dev); napi_enable(&mac->napi); - /* Interrupts are a bit different for our DMA controller: While - * it's got one a regular PCI device header, the interrupt there - * is really the base of the range it's using. Each tx and rx - * channel has it's own interrupt source. - */ - - base_irq = virq_to_hw(mac->dma_pdev->irq); - - mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch); - snprintf(mac->tx_irq_name, sizeof(mac->tx_irq_name), "%s tx", dev->name); - ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED, + ret = request_irq(mac->tx->chan.irq, &pasemi_mac_tx_intr, IRQF_DISABLED, mac->tx_irq_name, mac->tx); if (ret) { dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n", - base_irq + mac->dma_txch, ret); + mac->tx->chan.irq, ret); goto out_tx_int; } - mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_rxch); - snprintf(mac->rx_irq_name, sizeof(mac->rx_irq_name), "%s rx", dev->name); - ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED, - mac->rx_irq_name, dev); + ret = request_irq(mac->rx->chan.irq, &pasemi_mac_rx_intr, IRQF_DISABLED, + mac->rx_irq_name, mac->rx); if (ret) { dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n", - base_irq + 20 + mac->dma_rxch, ret); + mac->rx->chan.irq, ret); goto out_rx_int; } @@ -1041,7 +1038,7 @@ static int pasemi_mac_open(struct net_device *dev) return 0; out_rx_int: - free_irq(mac->tx_irq, mac->tx); + free_irq(mac->tx->chan.irq, mac->tx); out_tx_int: napi_disable(&mac->napi); netif_stop_queue(dev); @@ -1061,6 +1058,10 @@ static int pasemi_mac_close(struct net_device *dev) struct pasemi_mac *mac = netdev_priv(dev); unsigned int sta; int retries; + int rxch, txch; + + rxch = rx_ring(mac)->chan.chno; + txch = tx_ring(mac)->chan.chno; if (mac->phydev) { phy_stop(mac->phydev); @@ -1070,20 +1071,20 @@ static int pasemi_mac_close(struct net_device *dev) netif_stop_queue(dev); napi_disable(&mac->napi); - sta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); + sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); if (sta & (PAS_DMA_RXINT_RCMDSTA_BP | PAS_DMA_RXINT_RCMDSTA_OO | PAS_DMA_RXINT_RCMDSTA_BT)) printk(KERN_DEBUG "pasemi_mac: rcmdsta error: 0x%08x\n", sta); - sta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch)); + sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch)); if (sta & (PAS_DMA_RXCHAN_CCMDSTA_DU | PAS_DMA_RXCHAN_CCMDSTA_OD | PAS_DMA_RXCHAN_CCMDSTA_FD | PAS_DMA_RXCHAN_CCMDSTA_DT)) printk(KERN_DEBUG "pasemi_mac: ccmdsta error: 0x%08x\n", sta); - sta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch)); + sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch)); if (sta & (PAS_DMA_TXCHAN_TCMDSTA_SZ | PAS_DMA_TXCHAN_TCMDSTA_DB | PAS_DMA_TXCHAN_TCMDSTA_DE | PAS_DMA_TXCHAN_TCMDSTA_DA)) printk(KERN_DEBUG "pasemi_mac: tcmdsta error: 0x%08x\n", sta); @@ -1093,26 +1094,25 @@ static int pasemi_mac_close(struct net_device *dev) pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE); /* Disable interface */ - write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), + write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), PAS_DMA_TXCHAN_TCMDSTA_ST); - write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), + write_dma_reg( PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST); - write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), + write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), PAS_DMA_RXCHAN_CCMDSTA_ST); for (retries = 0; retries < MAX_RETRIES; retries++) { - sta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch)); + sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(rxch)); if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)) break; cond_resched(); } if (sta & PAS_DMA_TXCHAN_TCMDSTA_ACT) - dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel %d\n", - mac->dma_txch); + dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n"); for (retries = 0; retries < MAX_RETRIES; retries++) { - sta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch)); + sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch)); if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)) break; cond_resched(); @@ -1122,7 +1122,7 @@ static int pasemi_mac_close(struct net_device *dev) dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n"); for (retries = 0; retries < MAX_RETRIES; retries++) { - sta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); + sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); if (!(sta & PAS_DMA_RXINT_RCMDSTA_ACT)) break; cond_resched(); @@ -1135,12 +1135,12 @@ static int pasemi_mac_close(struct net_device *dev) * stopping, since you can't disable when active. */ - write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0); - write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0); - write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0); + write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), 0); + write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), 0); + write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0); - free_irq(mac->tx_irq, mac->tx); - free_irq(mac->rx_irq, mac->rx); + free_irq(mac->tx->chan.irq, mac->tx); + free_irq(mac->rx->chan.irq, mac->rx); /* Free resources */ pasemi_mac_free_rx_resources(mac); @@ -1239,7 +1239,7 @@ static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev) spin_unlock_irqrestore(&txring->lock, flags); - write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(txring->chan), (nfrags+2) >> 1); + write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), (nfrags+2) >> 1); return NETDEV_TX_OK; @@ -1287,77 +1287,9 @@ static int pasemi_mac_poll(struct napi_struct *napi, int budget) return pkts; } -static void __iomem * __devinit map_onedev(struct pci_dev *p, int index) -{ - struct device_node *dn; - void __iomem *ret; - - dn = pci_device_to_OF_node(p); - if (!dn) - goto fallback; - - ret = of_iomap(dn, index); - if (!ret) - goto fallback; - - return ret; -fallback: - /* This is hardcoded and ugly, but we have some firmware versions - * that don't provide the register space in the device tree. Luckily - * they are at well-known locations so we can just do the math here. - */ - return ioremap(0xe0000000 + (p->devfn << 12), 0x2000); -} - -static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac) -{ - struct resource res; - struct device_node *dn; - int err; - - mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL); - if (!mac->dma_pdev) { - dev_err(&mac->pdev->dev, "Can't find DMA Controller\n"); - return -ENODEV; - } - - mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL); - if (!mac->iob_pdev) { - dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n"); - return -ENODEV; - } - - mac->regs = map_onedev(mac->pdev, 0); - mac->dma_regs = map_onedev(mac->dma_pdev, 0); - mac->iob_regs = map_onedev(mac->iob_pdev, 0); - - if (!mac->regs || !mac->dma_regs || !mac->iob_regs) { - dev_err(&mac->pdev->dev, "Can't map registers\n"); - return -ENODEV; - } - - /* The dma status structure is located in the I/O bridge, and - * is cache coherent. - */ - if (!dma_status) { - dn = pci_device_to_OF_node(mac->iob_pdev); - if (dn) - err = of_address_to_resource(dn, 1, &res); - if (!dn || err) { - /* Fallback for old firmware */ - res.start = 0xfd800000; - res.end = res.start + 0x1000; - } - dma_status = __ioremap(res.start, res.end-res.start, 0); - } - - return 0; -} - static int __devinit pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { - static int index = 0; struct net_device *dev; struct pasemi_mac *mac; int err; @@ -1387,18 +1319,33 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) dev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX | NETIF_F_SG; - /* These should come out of the device tree eventually */ - mac->dma_txch = index; - mac->dma_rxch = index; + mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL); + if (!mac->dma_pdev) { + dev_err(&mac->pdev->dev, "Can't find DMA Controller\n"); + err = -ENODEV; + goto out; + } - /* We probe GMAC before XAUI, but the DMA interfaces are - * in XAUI, GMAC order. - */ - if (index < 4) - mac->dma_if = index + 2; - else - mac->dma_if = index - 4; - index++; + mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL); + if (!mac->iob_pdev) { + dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n"); + err = -ENODEV; + goto out; + } + + /* get mac addr from device tree */ + if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) { + err = -ENODEV; + goto out; + } + memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr)); + + mac->dma_if = mac_to_intf(mac); + if (mac->dma_if < 0) { + dev_err(&mac->pdev->dev, "Can't map DMA interface\n"); + err = -ENODEV; + goto out; + } switch (pdev->device) { case 0xa005: @@ -1412,19 +1359,11 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto out; } - /* get mac addr from device tree */ - if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) { - err = -ENODEV; - goto out; - } - memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr)); - dev->open = pasemi_mac_open; dev->stop = pasemi_mac_close; dev->hard_start_xmit = pasemi_mac_start_tx; dev->set_multicast_list = pasemi_mac_set_rx_mode; - err = pasemi_mac_map_regs(mac); if (err) goto out; @@ -1451,12 +1390,6 @@ out: pci_dev_put(mac->iob_pdev); if (mac->dma_pdev) pci_dev_put(mac->dma_pdev); - if (mac->dma_regs) - iounmap(mac->dma_regs); - if (mac->iob_regs) - iounmap(mac->iob_regs); - if (mac->regs) - iounmap(mac->regs); free_netdev(dev); out_disable_device: @@ -1481,9 +1414,8 @@ static void __devexit pasemi_mac_remove(struct pci_dev *pdev) pci_dev_put(mac->dma_pdev); pci_dev_put(mac->iob_pdev); - iounmap(mac->regs); - iounmap(mac->dma_regs); - iounmap(mac->iob_regs); + pasemi_dma_free_chan(&mac->tx->chan); + pasemi_dma_free_chan(&mac->rx->chan); pci_set_drvdata(pdev, NULL); free_netdev(netdev); @@ -1507,12 +1439,16 @@ static struct pci_driver pasemi_mac_driver = { static void __exit pasemi_mac_cleanup_module(void) { pci_unregister_driver(&pasemi_mac_driver); - __iounmap(dma_status); - dma_status = NULL; } int pasemi_mac_init_module(void) { + int err; + + err = pasemi_dma_init(); + if (err) + return err; + return pci_register_driver(&pasemi_mac_driver); } diff --git a/drivers/net/pasemi_mac.h b/drivers/net/pasemi_mac.h index c61c011..64b2047 100644 --- a/drivers/net/pasemi_mac.h +++ b/drivers/net/pasemi_mac.h @@ -27,23 +27,18 @@ #include <linux/phy.h> struct pasemi_mac_txring { + struct pasemi_dmachan chan; /* Must be first */ spinlock_t lock; - u64 *status; /* Ptr to cacheable status area */ - u64 *ring; - dma_addr_t dma; unsigned int size; unsigned int next_to_fill; unsigned int next_to_clean; struct pasemi_mac_buffer *ring_info; - int chan; struct pasemi_mac *mac; /* Needed in intr handler */ }; struct pasemi_mac_rxring { + struct pasemi_dmachan chan; /* Must be first */ spinlock_t lock; - u64 *status; /* Ptr to cacheable status area */ - u64 *ring; /* RX channel descriptor ring */ - dma_addr_t dma; u64 *buffers; /* RX interface buffer ring */ dma_addr_t buf_dma; unsigned int size; @@ -55,9 +50,6 @@ struct pasemi_mac_rxring { struct pasemi_mac { struct net_device *netdev; - void __iomem *regs; - void __iomem *dma_regs; - void __iomem *iob_regs; struct pci_dev *pdev; struct pci_dev *dma_pdev; struct pci_dev *iob_pdev; @@ -67,8 +59,6 @@ struct pasemi_mac { u8 type; #define MAC_TYPE_GMAC 1 #define MAC_TYPE_XAUI 2 - u32 dma_txch; - u32 dma_rxch; u32 dma_if; u8 mac_addr[6]; @@ -77,8 +67,6 @@ struct pasemi_mac { struct pasemi_mac_txring *tx; struct pasemi_mac_rxring *rx; - unsigned int tx_irq; - unsigned int rx_irq; char tx_irq_name[10]; /* "eth%d tx" */ char rx_irq_name[10]; /* "eth%d rx" */ int link; |