Hi Iyappan, [auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Iyappan-Subramanian/drivers-net-xgene-v2-Add-RGMII-based-1G-driver/20170201-034317 config: i386-allmodconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): In file included from include/linux/byteorder/little_endian.h:4:0, from arch/x86/include/uapi/asm/byteorder.h:4, from include/asm-generic/bitops/le.h:5, from arch/x86/include/asm/bitops.h:517, from include/linux/bitops.h:36, from include/linux/kernel.h:10, from include/linux/list.h:8, from include/linux/resource_ext.h:17, from include/linux/acpi.h:26, from drivers/net/ethernet/apm/xgene-v2/main.h:25, from drivers/net/ethernet/apm/xgene-v2/main.c:22: drivers/net/ethernet/apm/xgene-v2/main.c: In function 'xge_refill_buffers': >> drivers/net/ethernet/apm/xgene-v2/main.c:162:20: warning: right shift count >> >= width of type [-Wshift-count-overflow] dma_addr >> PKT_ADDRL_LEN)); ^ include/uapi/linux/byteorder/little_endian.h:30:51: note: in definition of macro '__cpu_to_le64' #define __cpu_to_le64(x) ((__force __le64)(__u64)(x)) ^ >> drivers/net/ethernet/apm/xgene-v2/main.c:161:9: note: in expansion of macro >> 'SET_BITS' SET_BITS(PKT_ADDRH, ^~~~~~~~ drivers/net/ethernet/apm/xgene-v2/main.c: In function 'xge_start_xmit': drivers/net/ethernet/apm/xgene-v2/main.c:346:19: warning: right shift count >= width of type [-Wshift-count-overflow] dma_addr >> PKT_ADDRL_LEN)); ^ include/uapi/linux/byteorder/little_endian.h:30:51: note: in definition of macro '__cpu_to_le64' #define __cpu_to_le64(x) ((__force __le64)(__u64)(x)) ^ drivers/net/ethernet/apm/xgene-v2/main.c:345:8: note: in expansion of macro 'SET_BITS' SET_BITS(PKT_ADDRH, ^~~~~~~~ drivers/net/ethernet/apm/xgene-v2/main.c: In function 'xge_rx_poll': >> drivers/net/ethernet/apm/xgene-v2/main.c:453:23: warning: left shift count >> >= width of type [-Wshift-count-overflow] dma_addr = (addr_hi << PKT_ADDRL_LEN) | addr_lo; ^~ -- drivers/net/ethernet/apm/xgene-v2/ring.c: In function 'xge_setup_desc': >> drivers/net/ethernet/apm/xgene-v2/ring.c:40:20: warning: right shift count >> >= width of type [-Wshift-count-overflow] dma_h = next_dma >> NEXT_DESC_ADDRL_LEN; ^~ drivers/net/ethernet/apm/xgene-v2/ring.c: In function 'xge_update_tx_desc_addr': drivers/net/ethernet/apm/xgene-v2/ring.c:51:42: warning: right shift count >= width of type [-Wshift-count-overflow] xge_wr_csr(pdata, DMATXDESCH, (dma_addr >> NEXT_DESC_ADDRL_LEN)); ^~ drivers/net/ethernet/apm/xgene-v2/ring.c: In function 'xge_update_rx_desc_addr': drivers/net/ethernet/apm/xgene-v2/ring.c:59:42: warning: right shift count >= width of type [-Wshift-count-overflow] xge_wr_csr(pdata, DMARXDESCH, (dma_addr >> NEXT_DESC_ADDRL_LEN)); ^~ vim +162 drivers/net/ethernet/apm/xgene-v2/main.c 90db21d34 Iyappan Subramanian 2017-01-31 16 * GNU General Public License for more details. 90db21d34 Iyappan Subramanian 2017-01-31 17 * 90db21d34 Iyappan Subramanian 2017-01-31 18 * You should have received a copy of the GNU General Public License 90db21d34 Iyappan Subramanian 2017-01-31 19 * along with this program. If not, see <http://www.gnu.org/licenses/>. 90db21d34 Iyappan Subramanian 2017-01-31 20 */ 90db21d34 Iyappan Subramanian 2017-01-31 21 90db21d34 Iyappan Subramanian 2017-01-31 @22 #include "main.h" 90db21d34 Iyappan Subramanian 2017-01-31 23 90db21d34 Iyappan Subramanian 2017-01-31 24 static const struct acpi_device_id xge_acpi_match[]; 90db21d34 Iyappan Subramanian 2017-01-31 25 90db21d34 Iyappan Subramanian 2017-01-31 26 static int xge_get_resources(struct xge_pdata *pdata) 90db21d34 Iyappan Subramanian 2017-01-31 27 { 90db21d34 Iyappan Subramanian 2017-01-31 28 struct platform_device *pdev; 90db21d34 Iyappan Subramanian 2017-01-31 29 struct net_device *ndev; 90db21d34 Iyappan Subramanian 2017-01-31 30 struct device *dev; 90db21d34 Iyappan Subramanian 2017-01-31 31 struct resource *res; 90db21d34 Iyappan Subramanian 2017-01-31 32 int phy_mode, ret = 0; 90db21d34 Iyappan Subramanian 2017-01-31 33 90db21d34 Iyappan Subramanian 2017-01-31 34 pdev = pdata->pdev; 90db21d34 Iyappan Subramanian 2017-01-31 35 dev = &pdev->dev; 90db21d34 Iyappan Subramanian 2017-01-31 36 ndev = pdata->ndev; 90db21d34 Iyappan Subramanian 2017-01-31 37 90db21d34 Iyappan Subramanian 2017-01-31 38 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 90db21d34 Iyappan Subramanian 2017-01-31 39 if (!res) { 90db21d34 Iyappan Subramanian 2017-01-31 40 dev_err(dev, "Resource enet_csr not defined\n"); 90db21d34 Iyappan Subramanian 2017-01-31 41 return -ENODEV; 90db21d34 Iyappan Subramanian 2017-01-31 42 } 90db21d34 Iyappan Subramanian 2017-01-31 43 90db21d34 Iyappan Subramanian 2017-01-31 44 pdata->resources.base_addr = devm_ioremap(dev, res->start, 90db21d34 Iyappan Subramanian 2017-01-31 45 resource_size(res)); 90db21d34 Iyappan Subramanian 2017-01-31 46 if (!pdata->resources.base_addr) { 90db21d34 Iyappan Subramanian 2017-01-31 47 dev_err(dev, "Unable to retrieve ENET Port CSR region\n"); 90db21d34 Iyappan Subramanian 2017-01-31 48 return -ENOMEM; 90db21d34 Iyappan Subramanian 2017-01-31 49 } 90db21d34 Iyappan Subramanian 2017-01-31 50 90db21d34 Iyappan Subramanian 2017-01-31 51 if (!device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) 90db21d34 Iyappan Subramanian 2017-01-31 52 eth_hw_addr_random(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 53 90db21d34 Iyappan Subramanian 2017-01-31 54 memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); 90db21d34 Iyappan Subramanian 2017-01-31 55 90db21d34 Iyappan Subramanian 2017-01-31 56 phy_mode = device_get_phy_mode(dev); 90db21d34 Iyappan Subramanian 2017-01-31 57 if (phy_mode < 0) { 90db21d34 Iyappan Subramanian 2017-01-31 58 dev_err(dev, "Unable to get phy-connection-type\n"); 90db21d34 Iyappan Subramanian 2017-01-31 59 return phy_mode; 90db21d34 Iyappan Subramanian 2017-01-31 60 } 90db21d34 Iyappan Subramanian 2017-01-31 61 pdata->resources.phy_mode = phy_mode; 90db21d34 Iyappan Subramanian 2017-01-31 62 90db21d34 Iyappan Subramanian 2017-01-31 63 if (pdata->resources.phy_mode != PHY_INTERFACE_MODE_RGMII) { 90db21d34 Iyappan Subramanian 2017-01-31 64 dev_err(dev, "Incorrect phy-connection-type specified\n"); 90db21d34 Iyappan Subramanian 2017-01-31 65 return -ENODEV; 90db21d34 Iyappan Subramanian 2017-01-31 66 } 90db21d34 Iyappan Subramanian 2017-01-31 67 90db21d34 Iyappan Subramanian 2017-01-31 68 ret = platform_get_irq(pdev, 0); 90db21d34 Iyappan Subramanian 2017-01-31 69 if (ret <= 0) { 90db21d34 Iyappan Subramanian 2017-01-31 70 dev_err(dev, "Unable to get ENET IRQ\n"); 90db21d34 Iyappan Subramanian 2017-01-31 71 ret = ret ? : -ENXIO; 90db21d34 Iyappan Subramanian 2017-01-31 72 return ret; 90db21d34 Iyappan Subramanian 2017-01-31 73 } 90db21d34 Iyappan Subramanian 2017-01-31 74 pdata->resources.irq = ret; 90db21d34 Iyappan Subramanian 2017-01-31 75 90db21d34 Iyappan Subramanian 2017-01-31 76 return 0; 90db21d34 Iyappan Subramanian 2017-01-31 77 } 90db21d34 Iyappan Subramanian 2017-01-31 78 90db21d34 Iyappan Subramanian 2017-01-31 79 static void xge_delete_desc_rings(struct net_device *ndev) 90db21d34 Iyappan Subramanian 2017-01-31 80 { 90db21d34 Iyappan Subramanian 2017-01-31 81 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 82 struct device *dev = &pdata->pdev->dev; 90db21d34 Iyappan Subramanian 2017-01-31 83 struct xge_desc_ring *ring; 90db21d34 Iyappan Subramanian 2017-01-31 84 90db21d34 Iyappan Subramanian 2017-01-31 85 ring = pdata->tx_ring; 90db21d34 Iyappan Subramanian 2017-01-31 86 if (ring) { 90db21d34 Iyappan Subramanian 2017-01-31 87 if (ring->skbs) 90db21d34 Iyappan Subramanian 2017-01-31 88 devm_kfree(dev, ring->skbs); 90db21d34 Iyappan Subramanian 2017-01-31 89 if (ring->pkt_bufs) 90db21d34 Iyappan Subramanian 2017-01-31 90 devm_kfree(dev, ring->pkt_bufs); 90db21d34 Iyappan Subramanian 2017-01-31 91 devm_kfree(dev, ring); 90db21d34 Iyappan Subramanian 2017-01-31 92 } 90db21d34 Iyappan Subramanian 2017-01-31 93 90db21d34 Iyappan Subramanian 2017-01-31 94 ring = pdata->rx_ring; 90db21d34 Iyappan Subramanian 2017-01-31 95 if (ring) { 90db21d34 Iyappan Subramanian 2017-01-31 96 if (ring->skbs) 90db21d34 Iyappan Subramanian 2017-01-31 97 devm_kfree(dev, ring->skbs); 90db21d34 Iyappan Subramanian 2017-01-31 98 devm_kfree(dev, ring); 90db21d34 Iyappan Subramanian 2017-01-31 99 } 90db21d34 Iyappan Subramanian 2017-01-31 100 } 90db21d34 Iyappan Subramanian 2017-01-31 101 90db21d34 Iyappan Subramanian 2017-01-31 102 static struct xge_desc_ring *xge_create_desc_ring(struct net_device *ndev) 90db21d34 Iyappan Subramanian 2017-01-31 103 { 90db21d34 Iyappan Subramanian 2017-01-31 104 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 105 struct device *dev = &pdata->pdev->dev; 90db21d34 Iyappan Subramanian 2017-01-31 106 struct xge_desc_ring *ring; 90db21d34 Iyappan Subramanian 2017-01-31 107 u16 size; 90db21d34 Iyappan Subramanian 2017-01-31 108 90db21d34 Iyappan Subramanian 2017-01-31 109 ring = devm_kzalloc(dev, sizeof(struct xge_desc_ring), GFP_KERNEL); 90db21d34 Iyappan Subramanian 2017-01-31 110 if (!ring) 90db21d34 Iyappan Subramanian 2017-01-31 111 return NULL; 90db21d34 Iyappan Subramanian 2017-01-31 112 90db21d34 Iyappan Subramanian 2017-01-31 113 ring->ndev = ndev; 90db21d34 Iyappan Subramanian 2017-01-31 114 90db21d34 Iyappan Subramanian 2017-01-31 115 size = XGENE_ENET_DESC_SIZE * XGENE_ENET_NUM_DESC; 90db21d34 Iyappan Subramanian 2017-01-31 116 ring->desc_addr = dmam_alloc_coherent(dev, size, &ring->dma_addr, 90db21d34 Iyappan Subramanian 2017-01-31 117 GFP_KERNEL | __GFP_ZERO); 90db21d34 Iyappan Subramanian 2017-01-31 118 if (!ring->desc_addr) { 90db21d34 Iyappan Subramanian 2017-01-31 119 devm_kfree(dev, ring); 90db21d34 Iyappan Subramanian 2017-01-31 120 return NULL; 90db21d34 Iyappan Subramanian 2017-01-31 121 } 90db21d34 Iyappan Subramanian 2017-01-31 122 90db21d34 Iyappan Subramanian 2017-01-31 123 xge_setup_desc(ring); 90db21d34 Iyappan Subramanian 2017-01-31 124 90db21d34 Iyappan Subramanian 2017-01-31 125 return ring; 90db21d34 Iyappan Subramanian 2017-01-31 126 } 90db21d34 Iyappan Subramanian 2017-01-31 127 90db21d34 Iyappan Subramanian 2017-01-31 128 static int xge_refill_buffers(struct net_device *ndev, u32 nbuf) 90db21d34 Iyappan Subramanian 2017-01-31 129 { 90db21d34 Iyappan Subramanian 2017-01-31 130 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 131 struct xge_desc_ring *ring = pdata->rx_ring; 90db21d34 Iyappan Subramanian 2017-01-31 132 const u8 slots = XGENE_ENET_NUM_DESC - 1; 90db21d34 Iyappan Subramanian 2017-01-31 133 struct device *dev = &pdata->pdev->dev; 90db21d34 Iyappan Subramanian 2017-01-31 134 struct xge_raw_desc *raw_desc; 90db21d34 Iyappan Subramanian 2017-01-31 135 u64 addr_lo, addr_hi; 90db21d34 Iyappan Subramanian 2017-01-31 136 u8 tail = ring->tail; 90db21d34 Iyappan Subramanian 2017-01-31 137 struct sk_buff *skb; 90db21d34 Iyappan Subramanian 2017-01-31 138 dma_addr_t dma_addr; 90db21d34 Iyappan Subramanian 2017-01-31 139 u16 len; 90db21d34 Iyappan Subramanian 2017-01-31 140 int i; 90db21d34 Iyappan Subramanian 2017-01-31 141 90db21d34 Iyappan Subramanian 2017-01-31 142 for (i = 0; i < nbuf; i++) { 90db21d34 Iyappan Subramanian 2017-01-31 143 raw_desc = &ring->raw_desc[tail]; 90db21d34 Iyappan Subramanian 2017-01-31 144 90db21d34 Iyappan Subramanian 2017-01-31 145 len = XGENE_ENET_STD_MTU; 90db21d34 Iyappan Subramanian 2017-01-31 146 skb = netdev_alloc_skb(ndev, len); 90db21d34 Iyappan Subramanian 2017-01-31 147 if (unlikely(!skb)) 90db21d34 Iyappan Subramanian 2017-01-31 148 return -ENOMEM; 90db21d34 Iyappan Subramanian 2017-01-31 149 90db21d34 Iyappan Subramanian 2017-01-31 150 dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE); 90db21d34 Iyappan Subramanian 2017-01-31 151 if (dma_mapping_error(dev, dma_addr)) { 90db21d34 Iyappan Subramanian 2017-01-31 152 netdev_err(ndev, "DMA mapping error\n"); 90db21d34 Iyappan Subramanian 2017-01-31 153 dev_kfree_skb_any(skb); 90db21d34 Iyappan Subramanian 2017-01-31 154 return -EINVAL; 90db21d34 Iyappan Subramanian 2017-01-31 155 } 90db21d34 Iyappan Subramanian 2017-01-31 156 90db21d34 Iyappan Subramanian 2017-01-31 157 addr_hi = GET_BITS(NEXT_DESC_ADDRH, le64_to_cpu(raw_desc->m1)); 90db21d34 Iyappan Subramanian 2017-01-31 158 addr_lo = GET_BITS(NEXT_DESC_ADDRL, le64_to_cpu(raw_desc->m1)); 90db21d34 Iyappan Subramanian 2017-01-31 159 raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, addr_lo) | 90db21d34 Iyappan Subramanian 2017-01-31 160 SET_BITS(NEXT_DESC_ADDRH, addr_hi) | 90db21d34 Iyappan Subramanian 2017-01-31 @161 SET_BITS(PKT_ADDRH, 90db21d34 Iyappan Subramanian 2017-01-31 @162 dma_addr >> PKT_ADDRL_LEN)); 90db21d34 Iyappan Subramanian 2017-01-31 163 90db21d34 Iyappan Subramanian 2017-01-31 164 dma_wmb(); 90db21d34 Iyappan Subramanian 2017-01-31 165 raw_desc->m0 = cpu_to_le64(SET_BITS(PKT_ADDRL, dma_addr) | 90db21d34 Iyappan Subramanian 2017-01-31 166 SET_BITS(E, 1)); dde456a0a Iyappan Subramanian 2017-01-31 167 90db21d34 Iyappan Subramanian 2017-01-31 168 ring->skbs[tail] = skb; 90db21d34 Iyappan Subramanian 2017-01-31 169 tail = (tail + 1) & slots; 90db21d34 Iyappan Subramanian 2017-01-31 170 } dde456a0a Iyappan Subramanian 2017-01-31 171 xge_wr_csr(pdata, DMARXCTRL, 1); 90db21d34 Iyappan Subramanian 2017-01-31 172 90db21d34 Iyappan Subramanian 2017-01-31 173 ring->tail = tail; 90db21d34 Iyappan Subramanian 2017-01-31 174 90db21d34 Iyappan Subramanian 2017-01-31 175 return 0; 90db21d34 Iyappan Subramanian 2017-01-31 176 } 90db21d34 Iyappan Subramanian 2017-01-31 177 90db21d34 Iyappan Subramanian 2017-01-31 178 static int xge_create_desc_rings(struct net_device *ndev) 90db21d34 Iyappan Subramanian 2017-01-31 179 { 90db21d34 Iyappan Subramanian 2017-01-31 180 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 181 struct device *dev = &pdata->pdev->dev; 90db21d34 Iyappan Subramanian 2017-01-31 182 struct xge_desc_ring *ring; 90db21d34 Iyappan Subramanian 2017-01-31 183 int ret; 90db21d34 Iyappan Subramanian 2017-01-31 184 90db21d34 Iyappan Subramanian 2017-01-31 185 /* create tx ring */ 90db21d34 Iyappan Subramanian 2017-01-31 186 ring = xge_create_desc_ring(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 187 if (!ring) 90db21d34 Iyappan Subramanian 2017-01-31 188 return -ENOMEM; 90db21d34 Iyappan Subramanian 2017-01-31 189 90db21d34 Iyappan Subramanian 2017-01-31 190 ring->skbs = devm_kcalloc(dev, XGENE_ENET_NUM_DESC, 90db21d34 Iyappan Subramanian 2017-01-31 191 sizeof(struct sk_buff *), GFP_KERNEL); 90db21d34 Iyappan Subramanian 2017-01-31 192 if (!ring->skbs) 90db21d34 Iyappan Subramanian 2017-01-31 193 goto err; 90db21d34 Iyappan Subramanian 2017-01-31 194 90db21d34 Iyappan Subramanian 2017-01-31 195 ring->pkt_bufs = devm_kcalloc(dev, XGENE_ENET_NUM_DESC, 90db21d34 Iyappan Subramanian 2017-01-31 196 sizeof(void *), GFP_KERNEL); 90db21d34 Iyappan Subramanian 2017-01-31 197 if (!ring->pkt_bufs) 90db21d34 Iyappan Subramanian 2017-01-31 198 goto err; 90db21d34 Iyappan Subramanian 2017-01-31 199 90db21d34 Iyappan Subramanian 2017-01-31 200 pdata->tx_ring = ring; 90db21d34 Iyappan Subramanian 2017-01-31 201 xge_update_tx_desc_addr(pdata); 90db21d34 Iyappan Subramanian 2017-01-31 202 90db21d34 Iyappan Subramanian 2017-01-31 203 /* create rx ring */ 90db21d34 Iyappan Subramanian 2017-01-31 204 ring = xge_create_desc_ring(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 205 if (!ring) 90db21d34 Iyappan Subramanian 2017-01-31 206 goto err; 90db21d34 Iyappan Subramanian 2017-01-31 207 90db21d34 Iyappan Subramanian 2017-01-31 208 ring->skbs = devm_kcalloc(dev, XGENE_ENET_NUM_DESC, 90db21d34 Iyappan Subramanian 2017-01-31 209 sizeof(struct sk_buff *), GFP_KERNEL); 90db21d34 Iyappan Subramanian 2017-01-31 210 if (!ring->skbs) 90db21d34 Iyappan Subramanian 2017-01-31 211 goto err; 90db21d34 Iyappan Subramanian 2017-01-31 212 90db21d34 Iyappan Subramanian 2017-01-31 213 pdata->rx_ring = ring; 90db21d34 Iyappan Subramanian 2017-01-31 214 xge_update_rx_desc_addr(pdata); 90db21d34 Iyappan Subramanian 2017-01-31 215 90db21d34 Iyappan Subramanian 2017-01-31 216 ret = xge_refill_buffers(ndev, XGENE_ENET_NUM_DESC); 90db21d34 Iyappan Subramanian 2017-01-31 217 if (!ret) 90db21d34 Iyappan Subramanian 2017-01-31 218 return 0; 90db21d34 Iyappan Subramanian 2017-01-31 219 90db21d34 Iyappan Subramanian 2017-01-31 220 err: 90db21d34 Iyappan Subramanian 2017-01-31 221 xge_delete_desc_rings(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 222 90db21d34 Iyappan Subramanian 2017-01-31 223 return -ENOMEM; 90db21d34 Iyappan Subramanian 2017-01-31 224 } 90db21d34 Iyappan Subramanian 2017-01-31 225 90db21d34 Iyappan Subramanian 2017-01-31 226 static int xge_init_hw(struct net_device *ndev) 90db21d34 Iyappan Subramanian 2017-01-31 227 { 90db21d34 Iyappan Subramanian 2017-01-31 228 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 229 int ret; 90db21d34 Iyappan Subramanian 2017-01-31 230 90db21d34 Iyappan Subramanian 2017-01-31 231 ret = xge_port_reset(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 232 if (ret) 90db21d34 Iyappan Subramanian 2017-01-31 233 return ret; 90db21d34 Iyappan Subramanian 2017-01-31 234 90db21d34 Iyappan Subramanian 2017-01-31 235 xge_create_desc_rings(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 236 xge_port_init(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 237 pdata->nbufs = NUM_BUFS; 90db21d34 Iyappan Subramanian 2017-01-31 238 90db21d34 Iyappan Subramanian 2017-01-31 239 return 0; 90db21d34 Iyappan Subramanian 2017-01-31 240 } 90db21d34 Iyappan Subramanian 2017-01-31 241 90db21d34 Iyappan Subramanian 2017-01-31 242 static irqreturn_t xge_irq(const int irq, void *data) 90db21d34 Iyappan Subramanian 2017-01-31 243 { 90db21d34 Iyappan Subramanian 2017-01-31 244 struct xge_pdata *pdata = data; 90db21d34 Iyappan Subramanian 2017-01-31 245 90db21d34 Iyappan Subramanian 2017-01-31 246 if (napi_schedule_prep(&pdata->napi)) { 90db21d34 Iyappan Subramanian 2017-01-31 247 xge_intr_disable(pdata); 90db21d34 Iyappan Subramanian 2017-01-31 248 __napi_schedule(&pdata->napi); 90db21d34 Iyappan Subramanian 2017-01-31 249 } 90db21d34 Iyappan Subramanian 2017-01-31 250 90db21d34 Iyappan Subramanian 2017-01-31 251 return IRQ_HANDLED; 90db21d34 Iyappan Subramanian 2017-01-31 252 } 90db21d34 Iyappan Subramanian 2017-01-31 253 90db21d34 Iyappan Subramanian 2017-01-31 254 static int xge_request_irq(struct net_device *ndev) 90db21d34 Iyappan Subramanian 2017-01-31 255 { 90db21d34 Iyappan Subramanian 2017-01-31 256 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 257 struct device *dev = &pdata->pdev->dev; 90db21d34 Iyappan Subramanian 2017-01-31 258 int ret; 90db21d34 Iyappan Subramanian 2017-01-31 259 90db21d34 Iyappan Subramanian 2017-01-31 260 snprintf(pdata->irq_name, IRQ_ID_SIZE, "%s", ndev->name); 90db21d34 Iyappan Subramanian 2017-01-31 261 90db21d34 Iyappan Subramanian 2017-01-31 262 ret = devm_request_irq(dev, pdata->resources.irq, xge_irq, 90db21d34 Iyappan Subramanian 2017-01-31 263 0, pdata->irq_name, pdata); 90db21d34 Iyappan Subramanian 2017-01-31 264 if (ret) 90db21d34 Iyappan Subramanian 2017-01-31 265 netdev_err(ndev, "Failed to request irq %s\n", pdata->irq_name); 90db21d34 Iyappan Subramanian 2017-01-31 266 90db21d34 Iyappan Subramanian 2017-01-31 267 return ret; 90db21d34 Iyappan Subramanian 2017-01-31 268 } 90db21d34 Iyappan Subramanian 2017-01-31 269 90db21d34 Iyappan Subramanian 2017-01-31 270 static void xge_free_irq(struct net_device *ndev) 90db21d34 Iyappan Subramanian 2017-01-31 271 { 90db21d34 Iyappan Subramanian 2017-01-31 272 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 273 struct device *dev = &pdata->pdev->dev; 90db21d34 Iyappan Subramanian 2017-01-31 274 90db21d34 Iyappan Subramanian 2017-01-31 275 devm_free_irq(dev, pdata->resources.irq, pdata); 90db21d34 Iyappan Subramanian 2017-01-31 276 } 90db21d34 Iyappan Subramanian 2017-01-31 277 90db21d34 Iyappan Subramanian 2017-01-31 278 static int xge_open(struct net_device *ndev) 90db21d34 Iyappan Subramanian 2017-01-31 279 { 90db21d34 Iyappan Subramanian 2017-01-31 280 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 281 int ret; 90db21d34 Iyappan Subramanian 2017-01-31 282 dde456a0a Iyappan Subramanian 2017-01-31 283 napi_enable(&pdata->napi); dde456a0a Iyappan Subramanian 2017-01-31 284 90db21d34 Iyappan Subramanian 2017-01-31 285 ret = xge_request_irq(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 286 if (ret) 90db21d34 Iyappan Subramanian 2017-01-31 287 return ret; 90db21d34 Iyappan Subramanian 2017-01-31 288 90db21d34 Iyappan Subramanian 2017-01-31 289 xge_intr_enable(pdata); 90db21d34 Iyappan Subramanian 2017-01-31 290 90db21d34 Iyappan Subramanian 2017-01-31 291 xge_mac_enable(pdata); 90db21d34 Iyappan Subramanian 2017-01-31 292 netif_start_queue(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 293 90db21d34 Iyappan Subramanian 2017-01-31 294 return 0; 90db21d34 Iyappan Subramanian 2017-01-31 295 } 90db21d34 Iyappan Subramanian 2017-01-31 296 90db21d34 Iyappan Subramanian 2017-01-31 297 static int xge_close(struct net_device *ndev) 90db21d34 Iyappan Subramanian 2017-01-31 298 { 90db21d34 Iyappan Subramanian 2017-01-31 299 struct xge_pdata *pdata = netdev_priv(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 300 90db21d34 Iyappan Subramanian 2017-01-31 301 netif_stop_queue(ndev); 90db21d34 Iyappan Subramanian 2017-01-31 302 xge_mac_disable(pdata); 90db21d34 Iyappan Subramanian 2017-01-31 303 dde456a0a Iyappan Subramanian 2017-01-31 304 xge_intr_disable(pdata); 90db21d34 Iyappan Subramanian 2017-01-31 305 xge_free_irq(ndev); dde456a0a Iyappan Subramanian 2017-01-31 306 napi_disable(&pdata->napi); 90db21d34 Iyappan Subramanian 2017-01-31 307 90db21d34 Iyappan Subramanian 2017-01-31 308 return 0; 90db21d34 Iyappan Subramanian 2017-01-31 309 } 90db21d34 Iyappan Subramanian 2017-01-31 310 dde456a0a Iyappan Subramanian 2017-01-31 311 static netdev_tx_t xge_start_xmit(struct sk_buff *skb, struct net_device *ndev) dde456a0a Iyappan Subramanian 2017-01-31 312 { dde456a0a Iyappan Subramanian 2017-01-31 313 struct xge_pdata *pdata = netdev_priv(ndev); dde456a0a Iyappan Subramanian 2017-01-31 314 struct device *dev = &pdata->pdev->dev; dde456a0a Iyappan Subramanian 2017-01-31 315 static dma_addr_t dma_addr; dde456a0a Iyappan Subramanian 2017-01-31 316 struct xge_desc_ring *tx_ring; dde456a0a Iyappan Subramanian 2017-01-31 317 struct xge_raw_desc *raw_desc; dde456a0a Iyappan Subramanian 2017-01-31 318 u64 addr_lo, addr_hi; dde456a0a Iyappan Subramanian 2017-01-31 319 void *pkt_buf; dde456a0a Iyappan Subramanian 2017-01-31 320 u8 tail; dde456a0a Iyappan Subramanian 2017-01-31 321 u16 len; dde456a0a Iyappan Subramanian 2017-01-31 322 dde456a0a Iyappan Subramanian 2017-01-31 323 tx_ring = pdata->tx_ring; dde456a0a Iyappan Subramanian 2017-01-31 324 tail = tx_ring->tail; dde456a0a Iyappan Subramanian 2017-01-31 325 len = skb_headlen(skb); dde456a0a Iyappan Subramanian 2017-01-31 326 raw_desc = &tx_ring->raw_desc[tail]; dde456a0a Iyappan Subramanian 2017-01-31 327 dde456a0a Iyappan Subramanian 2017-01-31 328 /* Tx descriptor not available */ dde456a0a Iyappan Subramanian 2017-01-31 329 if (!GET_BITS(E, le64_to_cpu(raw_desc->m0)) || dde456a0a Iyappan Subramanian 2017-01-31 330 GET_BITS(PKT_SIZE, le64_to_cpu(raw_desc->m0))) dde456a0a Iyappan Subramanian 2017-01-31 331 return NETDEV_TX_BUSY; dde456a0a Iyappan Subramanian 2017-01-31 332 dde456a0a Iyappan Subramanian 2017-01-31 333 /* Packet buffers should be 64B aligned */ dde456a0a Iyappan Subramanian 2017-01-31 334 pkt_buf = dma_alloc_coherent(dev, XGENE_ENET_STD_MTU, &dma_addr, dde456a0a Iyappan Subramanian 2017-01-31 335 GFP_ATOMIC); dde456a0a Iyappan Subramanian 2017-01-31 336 if (unlikely(!pkt_buf)) dde456a0a Iyappan Subramanian 2017-01-31 337 goto out; dde456a0a Iyappan Subramanian 2017-01-31 338 dde456a0a Iyappan Subramanian 2017-01-31 339 memcpy(pkt_buf, skb->data, len); dde456a0a Iyappan Subramanian 2017-01-31 340 dde456a0a Iyappan Subramanian 2017-01-31 341 addr_hi = GET_BITS(NEXT_DESC_ADDRH, le64_to_cpu(raw_desc->m1)); dde456a0a Iyappan Subramanian 2017-01-31 342 addr_lo = GET_BITS(NEXT_DESC_ADDRL, le64_to_cpu(raw_desc->m1)); dde456a0a Iyappan Subramanian 2017-01-31 343 raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, addr_lo) | dde456a0a Iyappan Subramanian 2017-01-31 344 SET_BITS(NEXT_DESC_ADDRH, addr_hi) | dde456a0a Iyappan Subramanian 2017-01-31 @345 SET_BITS(PKT_ADDRH, dde456a0a Iyappan Subramanian 2017-01-31 346 dma_addr >> PKT_ADDRL_LEN)); dde456a0a Iyappan Subramanian 2017-01-31 347 dde456a0a Iyappan Subramanian 2017-01-31 348 dma_wmb(); :::::: The code at line 162 was first introduced by commit :::::: 90db21d344b12f41c93e821a69a96a60453e9dd8 drivers: net: xgene-v2: Add base driver :::::: TO: Iyappan Subramanian <isubraman...@apm.com> :::::: CC: 0day robot <fengguang...@intel.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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