diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/net/ethernet/renesas/sh_eth.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/net/ethernet/renesas/sh_eth.c')
-rw-r--r-- | kernel/drivers/net/ethernet/renesas/sh_eth.c | 198 |
1 files changed, 101 insertions, 97 deletions
diff --git a/kernel/drivers/net/ethernet/renesas/sh_eth.c b/kernel/drivers/net/ethernet/renesas/sh_eth.c index 7fb244f56..6a8fc0f34 100644 --- a/kernel/drivers/net/ethernet/renesas/sh_eth.c +++ b/kernel/drivers/net/ethernet/renesas/sh_eth.c @@ -52,6 +52,8 @@ NETIF_MSG_RX_ERR| \ NETIF_MSG_TX_ERR) +#define SH_ETH_OFFSET_INVALID ((u16)~0) + #define SH_ETH_OFFSET_DEFAULTS \ [0 ... SH_ETH_MAX_REGISTER_OFFSET - 1] = SH_ETH_OFFSET_INVALID @@ -404,6 +406,28 @@ static const u16 sh_eth_offset_fast_sh3_sh2[SH_ETH_MAX_REGISTER_OFFSET] = { static void sh_eth_rcv_snd_disable(struct net_device *ndev); static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev); +static void sh_eth_write(struct net_device *ndev, u32 data, int enum_index) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + u16 offset = mdp->reg_offset[enum_index]; + + if (WARN_ON(offset == SH_ETH_OFFSET_INVALID)) + return; + + iowrite32(data, mdp->addr + offset); +} + +static u32 sh_eth_read(struct net_device *ndev, int enum_index) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + u16 offset = mdp->reg_offset[enum_index]; + + if (WARN_ON(offset == SH_ETH_OFFSET_INVALID)) + return ~0U; + + return ioread32(mdp->addr + offset); +} + static bool sh_eth_is_gether(struct sh_eth_private *mdp) { return mdp->reg_offset == sh_eth_offset_gigabit; @@ -1098,7 +1122,7 @@ static struct mdiobb_ops bb_ops = { static void sh_eth_ring_free(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); - int i; + int ringsize, i; /* Free Rx skb ringbuffer */ if (mdp->rx_skbuff) { @@ -1115,6 +1139,20 @@ static void sh_eth_ring_free(struct net_device *ndev) } kfree(mdp->tx_skbuff); mdp->tx_skbuff = NULL; + + if (mdp->rx_ring) { + ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring; + dma_free_coherent(NULL, ringsize, mdp->rx_ring, + mdp->rx_desc_dma); + mdp->rx_ring = NULL; + } + + if (mdp->tx_ring) { + ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring; + dma_free_coherent(NULL, ringsize, mdp->tx_ring, + mdp->tx_desc_dma); + mdp->tx_ring = NULL; + } } /* format skb and descriptor buffer */ @@ -1127,8 +1165,9 @@ static void sh_eth_ring_format(struct net_device *ndev) struct sh_eth_txdesc *txdesc = NULL; int rx_ringsize = sizeof(*rxdesc) * mdp->num_rx_ring; int tx_ringsize = sizeof(*txdesc) * mdp->num_tx_ring; - int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN - 1; + int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1; dma_addr_t dma_addr; + u32 buf_len; mdp->cur_rx = 0; mdp->cur_tx = 0; @@ -1148,17 +1187,17 @@ static void sh_eth_ring_format(struct net_device *ndev) /* RX descriptor */ rxdesc = &mdp->rx_ring[i]; - /* The size of the buffer is a multiple of 16 bytes. */ - rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16); - dma_addr = dma_map_single(&ndev->dev, skb->data, - rxdesc->buffer_length, + /* The size of the buffer is a multiple of 32 bytes. */ + buf_len = ALIGN(mdp->rx_buf_sz, 32); + rxdesc->len = cpu_to_edmac(mdp, buf_len << 16); + dma_addr = dma_map_single(&ndev->dev, skb->data, buf_len, DMA_FROM_DEVICE); if (dma_mapping_error(&ndev->dev, dma_addr)) { kfree_skb(skb); break; } mdp->rx_skbuff[i] = skb; - rxdesc->addr = dma_addr; + rxdesc->addr = cpu_to_edmac(mdp, dma_addr); rxdesc->status = cpu_to_edmac(mdp, RD_RACT | RD_RFP); /* Rx descriptor address set */ @@ -1173,7 +1212,7 @@ static void sh_eth_ring_format(struct net_device *ndev) mdp->dirty_rx = (u32) (i - mdp->num_rx_ring); /* Mark the last entry as wrapping the ring. */ - rxdesc->status |= cpu_to_edmac(mdp, RD_RDEL); + rxdesc->status |= cpu_to_edmac(mdp, RD_RDLE); memset(mdp->tx_ring, 0, tx_ringsize); @@ -1182,7 +1221,7 @@ static void sh_eth_ring_format(struct net_device *ndev) mdp->tx_skbuff[i] = NULL; txdesc = &mdp->tx_ring[i]; txdesc->status = cpu_to_edmac(mdp, TD_TFP); - txdesc->buffer_length = 0; + txdesc->len = cpu_to_edmac(mdp, 0); if (i == 0) { /* Tx descriptor address set */ sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR); @@ -1199,7 +1238,7 @@ static void sh_eth_ring_format(struct net_device *ndev) static int sh_eth_ring_init(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); - int rx_ringsize, tx_ringsize, ret = 0; + int rx_ringsize, tx_ringsize; /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the * card needs room to do 8 byte alignment, +2 so we can reserve @@ -1212,28 +1251,22 @@ static int sh_eth_ring_init(struct net_device *ndev) mdp->rx_buf_sz += NET_IP_ALIGN; /* Allocate RX and TX skb rings */ - mdp->rx_skbuff = kmalloc_array(mdp->num_rx_ring, - sizeof(*mdp->rx_skbuff), GFP_KERNEL); - if (!mdp->rx_skbuff) { - ret = -ENOMEM; - return ret; - } + mdp->rx_skbuff = kcalloc(mdp->num_rx_ring, sizeof(*mdp->rx_skbuff), + GFP_KERNEL); + if (!mdp->rx_skbuff) + return -ENOMEM; - mdp->tx_skbuff = kmalloc_array(mdp->num_tx_ring, - sizeof(*mdp->tx_skbuff), GFP_KERNEL); - if (!mdp->tx_skbuff) { - ret = -ENOMEM; - goto skb_ring_free; - } + mdp->tx_skbuff = kcalloc(mdp->num_tx_ring, sizeof(*mdp->tx_skbuff), + GFP_KERNEL); + if (!mdp->tx_skbuff) + goto ring_free; /* Allocate all Rx descriptors. */ rx_ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring; mdp->rx_ring = dma_alloc_coherent(NULL, rx_ringsize, &mdp->rx_desc_dma, GFP_KERNEL); - if (!mdp->rx_ring) { - ret = -ENOMEM; - goto desc_ring_free; - } + if (!mdp->rx_ring) + goto ring_free; mdp->dirty_rx = 0; @@ -1241,42 +1274,15 @@ static int sh_eth_ring_init(struct net_device *ndev) tx_ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring; mdp->tx_ring = dma_alloc_coherent(NULL, tx_ringsize, &mdp->tx_desc_dma, GFP_KERNEL); - if (!mdp->tx_ring) { - ret = -ENOMEM; - goto desc_ring_free; - } - return ret; - -desc_ring_free: - /* free DMA buffer */ - dma_free_coherent(NULL, rx_ringsize, mdp->rx_ring, mdp->rx_desc_dma); + if (!mdp->tx_ring) + goto ring_free; + return 0; -skb_ring_free: - /* Free Rx and Tx skb ring buffer */ +ring_free: + /* Free Rx and Tx skb ring buffer and DMA buffer */ sh_eth_ring_free(ndev); - mdp->tx_ring = NULL; - mdp->rx_ring = NULL; - return ret; -} - -static void sh_eth_free_dma_buffer(struct sh_eth_private *mdp) -{ - int ringsize; - - if (mdp->rx_ring) { - ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring; - dma_free_coherent(NULL, ringsize, mdp->rx_ring, - mdp->rx_desc_dma); - mdp->rx_ring = NULL; - } - - if (mdp->tx_ring) { - ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring; - dma_free_coherent(NULL, ringsize, mdp->tx_ring, - mdp->tx_desc_dma); - mdp->tx_ring = NULL; - } + return -ENOMEM; } static int sh_eth_dev_init(struct net_device *ndev, bool start) @@ -1416,14 +1422,16 @@ static int sh_eth_txfree(struct net_device *ndev) if (txdesc->status & cpu_to_edmac(mdp, TD_TACT)) break; /* TACT bit must be checked before all the following reads */ - rmb(); + dma_rmb(); netif_info(mdp, tx_done, ndev, "tx entry %d status 0x%08x\n", entry, edmac_to_cpu(mdp, txdesc->status)); /* Free the original skb. */ if (mdp->tx_skbuff[entry]) { - dma_unmap_single(&ndev->dev, txdesc->addr, - txdesc->buffer_length, DMA_TO_DEVICE); + dma_unmap_single(&ndev->dev, + edmac_to_cpu(mdp, txdesc->addr), + edmac_to_cpu(mdp, txdesc->len) >> 16, + DMA_TO_DEVICE); dev_kfree_skb_irq(mdp->tx_skbuff[entry]); mdp->tx_skbuff[entry] = NULL; free_num++; @@ -1433,7 +1441,7 @@ static int sh_eth_txfree(struct net_device *ndev) txdesc->status |= cpu_to_edmac(mdp, TD_TDLE); ndev->stats.tx_packets++; - ndev->stats.tx_bytes += txdesc->buffer_length; + ndev->stats.tx_bytes += edmac_to_cpu(mdp, txdesc->len) >> 16; } return free_num; } @@ -1450,17 +1458,18 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) struct sk_buff *skb; u16 pkt_len = 0; u32 desc_status; - int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN - 1; + int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1; dma_addr_t dma_addr; + u32 buf_len; boguscnt = min(boguscnt, *quota); limit = boguscnt; rxdesc = &mdp->rx_ring[entry]; while (!(rxdesc->status & cpu_to_edmac(mdp, RD_RACT))) { /* RACT bit must be checked before all the following reads */ - rmb(); + dma_rmb(); desc_status = edmac_to_cpu(mdp, rxdesc->status); - pkt_len = rxdesc->frame_length; + pkt_len = edmac_to_cpu(mdp, rxdesc->len) & RD_RFL; if (--boguscnt < 0) break; @@ -1481,6 +1490,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) if (mdp->cd->shift_rd0) desc_status >>= 16; + skb = mdp->rx_skbuff[entry]; if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 | RD_RFS5 | RD_RFS6 | RD_RFS10)) { ndev->stats.rx_errors++; @@ -1496,17 +1506,17 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) ndev->stats.rx_missed_errors++; if (desc_status & RD_RFS10) ndev->stats.rx_over_errors++; - } else { + } else if (skb) { + dma_addr = edmac_to_cpu(mdp, rxdesc->addr); if (!mdp->cd->hw_swap) sh_eth_soft_swap( - phys_to_virt(ALIGN(rxdesc->addr, 4)), + phys_to_virt(ALIGN(dma_addr, 4)), pkt_len + 2); - skb = mdp->rx_skbuff[entry]; mdp->rx_skbuff[entry] = NULL; if (mdp->cd->rpadir) skb_reserve(skb, NET_IP_ALIGN); - dma_unmap_single(&ndev->dev, rxdesc->addr, - ALIGN(mdp->rx_buf_sz, 16), + dma_unmap_single(&ndev->dev, dma_addr, + ALIGN(mdp->rx_buf_sz, 32), DMA_FROM_DEVICE); skb_put(skb, pkt_len); skb->protocol = eth_type_trans(skb, ndev); @@ -1524,8 +1534,9 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) { entry = mdp->dirty_rx % mdp->num_rx_ring; rxdesc = &mdp->rx_ring[entry]; - /* The size of the buffer is 16 byte boundary. */ - rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16); + /* The size of the buffer is 32 byte boundary. */ + buf_len = ALIGN(mdp->rx_buf_sz, 32); + rxdesc->len = cpu_to_edmac(mdp, buf_len << 16); if (mdp->rx_skbuff[entry] == NULL) { skb = netdev_alloc_skb(ndev, skbuff_size); @@ -1533,8 +1544,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) break; /* Better luck next round. */ sh_eth_set_receive_align(skb); dma_addr = dma_map_single(&ndev->dev, skb->data, - rxdesc->buffer_length, - DMA_FROM_DEVICE); + buf_len, DMA_FROM_DEVICE); if (dma_mapping_error(&ndev->dev, dma_addr)) { kfree_skb(skb); break; @@ -1542,12 +1552,12 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota) mdp->rx_skbuff[entry] = skb; skb_checksum_none_assert(skb); - rxdesc->addr = dma_addr; + rxdesc->addr = cpu_to_edmac(mdp, dma_addr); } - wmb(); /* RACT bit must be set after all the above writes */ + dma_wmb(); /* RACT bit must be set after all the above writes */ if (entry >= mdp->num_rx_ring - 1) rxdesc->status |= - cpu_to_edmac(mdp, RD_RACT | RD_RFP | RD_RDEL); + cpu_to_edmac(mdp, RD_RACT | RD_RFP | RD_RDLE); else rxdesc->status |= cpu_to_edmac(mdp, RD_RACT | RD_RFP); @@ -2239,10 +2249,8 @@ static int sh_eth_set_ringparam(struct net_device *ndev, sh_eth_dev_exit(ndev); - /* Free all the skbuffs in the Rx queue. */ + /* Free all the skbuffs in the Rx queue and the DMA buffers. */ sh_eth_ring_free(ndev); - /* Free DMA buffer */ - sh_eth_free_dma_buffer(mdp); } /* Set new parameters */ @@ -2352,8 +2360,8 @@ static void sh_eth_tx_timeout(struct net_device *ndev) /* Free all the skbuffs in the Rx queue. */ for (i = 0; i < mdp->num_rx_ring; i++) { rxdesc = &mdp->rx_ring[i]; - rxdesc->status = 0; - rxdesc->addr = 0xBADF00D0; + rxdesc->status = cpu_to_edmac(mdp, 0); + rxdesc->addr = cpu_to_edmac(mdp, 0xBADF00D0); dev_kfree_skb(mdp->rx_skbuff[i]); mdp->rx_skbuff[i] = NULL; } @@ -2371,6 +2379,7 @@ static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); struct sh_eth_txdesc *txdesc; + dma_addr_t dma_addr; u32 entry; unsigned long flags; @@ -2393,17 +2402,17 @@ static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev) txdesc = &mdp->tx_ring[entry]; /* soft swap. */ if (!mdp->cd->hw_swap) - sh_eth_soft_swap(phys_to_virt(ALIGN(txdesc->addr, 4)), - skb->len + 2); - txdesc->addr = dma_map_single(&ndev->dev, skb->data, skb->len, - DMA_TO_DEVICE); - if (dma_mapping_error(&ndev->dev, txdesc->addr)) { + sh_eth_soft_swap(PTR_ALIGN(skb->data, 4), skb->len + 2); + dma_addr = dma_map_single(&ndev->dev, skb->data, skb->len, + DMA_TO_DEVICE); + if (dma_mapping_error(&ndev->dev, dma_addr)) { kfree_skb(skb); return NETDEV_TX_OK; } - txdesc->buffer_length = skb->len; + txdesc->addr = cpu_to_edmac(mdp, dma_addr); + txdesc->len = cpu_to_edmac(mdp, skb->len << 16); - wmb(); /* TACT bit must be set after all the above writes */ + dma_wmb(); /* TACT bit must be set after all the above writes */ if (entry >= mdp->num_tx_ring - 1) txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE); else @@ -2487,12 +2496,9 @@ static int sh_eth_close(struct net_device *ndev) free_irq(ndev->irq, ndev); - /* Free all the skbuffs in the Rx queue. */ + /* Free all the skbuffs in the Rx queue and the DMA buffer. */ sh_eth_ring_free(ndev); - /* free DMA buffer */ - sh_eth_free_dma_buffer(mdp); - pm_runtime_put_sync(&mdp->pdev->dev); mdp->is_opened = 0; @@ -3089,10 +3095,8 @@ static int sh_eth_drv_probe(struct platform_device *pdev) ndev->dma = -1; ret = platform_get_irq(pdev, 0); - if (ret < 0) { - ret = -ENODEV; + if (ret < 0) goto out_release; - } ndev->irq = ret; SET_NETDEV_DEV(ndev, &pdev->dev); |