igb: transition driver to only using advanced descriptors (85e8d004) · Commits · e / devices / android_kernel_samsung_universal8895

drivers/net/igb/e1000_hw.h

+0 −138

Original line number	Diff line number	Diff line
		@@ -144,144 +144,6 @@ enum e1000_fc_type {
		e1000_fc_default = 0xFF
		};


		/* Receive Descriptor */
		struct e1000_rx_desc {
		__le64 buffer_addr; /* Address of the descriptor's data buffer */
		__le16 length; /* Length of data DMAed into data buffer */
		__le16 csum; /* Packet checksum */
		u8 status; /* Descriptor status */
		u8 errors; /* Descriptor Errors */
		__le16 special;
		};

		/* Receive Descriptor - Extended */
		union e1000_rx_desc_extended {
		struct {
		__le64 buffer_addr;
		__le64 reserved;
		} read;
		struct {
		struct {
		__le32 mrq; /* Multiple Rx Queues */
		union {
		__le32 rss; /* RSS Hash */
		struct {
		__le16 ip_id; /* IP id */
		__le16 csum; /* Packet Checksum */
		} csum_ip;
		} hi_dword;
		} lower;
		struct {
		__le32 status_error; /* ext status/error */
		__le16 length;
		__le16 vlan; /* VLAN tag */
		} upper;
		} wb; /* writeback */
		};

		#define MAX_PS_BUFFERS 4
		/* Receive Descriptor - Packet Split */
		union e1000_rx_desc_packet_split {
		struct {
		/* one buffer for protocol header(s), three data buffers */
		__le64 buffer_addr[MAX_PS_BUFFERS];
		} read;
		struct {
		struct {
		__le32 mrq; /* Multiple Rx Queues */
		union {
		__le32 rss; /* RSS Hash */
		struct {
		__le16 ip_id; /* IP id */
		__le16 csum; /* Packet Checksum */
		} csum_ip;
		} hi_dword;
		} lower;
		struct {
		__le32 status_error; /* ext status/error */
		__le16 length0; /* length of buffer 0 */
		__le16 vlan; /* VLAN tag */
		} middle;
		struct {
		__le16 header_status;
		__le16 length[3]; /* length of buffers 1-3 */
		} upper;
		__le64 reserved;
		} wb; /* writeback */
		};

		/* Transmit Descriptor */
		struct e1000_tx_desc {
		__le64 buffer_addr; /* Address of the descriptor's data buffer */
		union {
		__le32 data;
		struct {
		__le16 length; /* Data buffer length */
		u8 cso; /* Checksum offset */
		u8 cmd; /* Descriptor control */
		} flags;
		} lower;
		union {
		__le32 data;
		struct {
		u8 status; /* Descriptor status */
		u8 css; /* Checksum start */
		__le16 special;
		} fields;
		} upper;
		};

		/* Offload Context Descriptor */
		struct e1000_context_desc {
		union {
		__le32 ip_config;
		struct {
		u8 ipcss; /* IP checksum start */
		u8 ipcso; /* IP checksum offset */
		__le16 ipcse; /* IP checksum end */
		} ip_fields;
		} lower_setup;
		union {
		__le32 tcp_config;
		struct {
		u8 tucss; /* TCP checksum start */
		u8 tucso; /* TCP checksum offset */
		__le16 tucse; /* TCP checksum end */
		} tcp_fields;
		} upper_setup;
		__le32 cmd_and_length;
		union {
		__le32 data;
		struct {
		u8 status; /* Descriptor status */
		u8 hdr_len; /* Header length */
		__le16 mss; /* Maximum segment size */
		} fields;
		} tcp_seg_setup;
		};

		/* Offload data descriptor */
		struct e1000_data_desc {
		__le64 buffer_addr; /* Address of the descriptor's buffer address */
		union {
		__le32 data;
		struct {
		__le16 length; /* Data buffer length */
		u8 typ_len_ext;
		u8 cmd;
		} flags;
		} lower;
		union {
		__le32 data;
		struct {
		u8 status; /* Descriptor status */
		u8 popts; /* Packet Options */
		__le16 special;
		} fields;
		} upper;
		};

		/* Statistics counters collected by the MAC */
		struct e1000_hw_stats {
		u64 crcerrs;

drivers/net/igb/igb.h

+0 −3

Original line number	Diff line number	Diff line
		@@ -180,9 +180,6 @@ struct igb_ring {
		(&(((union e1000_adv_tx_desc *)((R).desc))[i]))
		#define E1000_TX_CTXTDESC_ADV(R, i) \
		(&(((struct e1000_adv_tx_context_desc *)((R).desc))[i]))
		#define E1000_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
		#define E1000_TX_DESC(R, i) E1000_GET_DESC(R, i, e1000_tx_desc)
		#define E1000_RX_DESC(R, i) E1000_GET_DESC(R, i, e1000_rx_desc)

		/* board specific private data structure */

drivers/net/igb/igb_ethtool.c

+29 −22

Original line number	Diff line number	Diff line
		@@ -1272,6 +1272,7 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
		struct igb_ring *tx_ring = &adapter->test_tx_ring;
		struct igb_ring *rx_ring = &adapter->test_rx_ring;
		struct pci_dev *pdev = adapter->pdev;
		struct igb_buffer *buffer_info;
		u32 rctl;
		int i, ret_val;

		@@ -1288,7 +1289,7 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
		goto err_nomem;
		}

		tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
		tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
		tx_ring->size = ALIGN(tx_ring->size, 4096);
		tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
		&tx_ring->dma);
		@@ -1302,7 +1303,7 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
		((u64) tx_ring->dma & 0x00000000FFFFFFFF));
		wr32(E1000_TDBAH(0), ((u64) tx_ring->dma >> 32));
		wr32(E1000_TDLEN(0),
		tx_ring->count * sizeof(struct e1000_tx_desc));
		tx_ring->count * sizeof(union e1000_adv_tx_desc));
		wr32(E1000_TDH(0), 0);
		wr32(E1000_TDT(0), 0);
		wr32(E1000_TCTL,
		@@ -1311,27 +1312,31 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
		E1000_COLLISION_DISTANCE << E1000_COLD_SHIFT);

		for (i = 0; i < tx_ring->count; i++) {
		struct e1000_tx_desc tx_desc = E1000_TX_DESC(tx_ring, i);
		union e1000_adv_tx_desc *tx_desc;
		struct sk_buff *skb;
		unsigned int size = 1024;

		tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
		skb = alloc_skb(size, GFP_KERNEL);
		if (!skb) {
		ret_val = 3;
		goto err_nomem;
		}
		skb_put(skb, size);
		tx_ring->buffer_info[i].skb = skb;
		tx_ring->buffer_info[i].length = skb->len;
		tx_ring->buffer_info[i].dma =
		pci_map_single(pdev, skb->data, skb->len,
		buffer_info = &tx_ring->buffer_info[i];
		buffer_info->skb = skb;
		buffer_info->length = skb->len;
		buffer_info->dma = pci_map_single(pdev, skb->data, skb->len,
		PCI_DMA_TODEVICE);
		tx_desc->buffer_addr = cpu_to_le64(tx_ring->buffer_info[i].dma);
		tx_desc->lower.data = cpu_to_le32(skb->len);
		tx_desc->lower.data \|= cpu_to_le32(E1000_TXD_CMD_EOP \|
		tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
		tx_desc->read.olinfo_status = cpu_to_le32(skb->len) <<
		E1000_ADVTXD_PAYLEN_SHIFT;
		tx_desc->read.cmd_type_len = cpu_to_le32(skb->len);
		tx_desc->read.cmd_type_len \|= cpu_to_le32(E1000_TXD_CMD_EOP \|
		E1000_TXD_CMD_IFCS \|
		E1000_TXD_CMD_RS);
		tx_desc->upper.data = 0;
		E1000_TXD_CMD_RS \|
		E1000_ADVTXD_DTYP_DATA \|
		E1000_ADVTXD_DCMD_DEXT);
		}

		/* Setup Rx descriptor ring and Rx buffers */
		@@ -1347,7 +1352,7 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
		goto err_nomem;
		}

		rx_ring->size = rx_ring->count * sizeof(struct e1000_rx_desc);
		rx_ring->size = rx_ring->count * sizeof(union e1000_adv_rx_desc);
		rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
		&rx_ring->dma);
		if (!rx_ring->desc) {
		@@ -1369,12 +1374,14 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
		rctl = E1000_RCTL_EN \| E1000_RCTL_BAM \| E1000_RCTL_RDMTS_HALF \|
		(adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
		wr32(E1000_RCTL, rctl);
		wr32(E1000_SRRCTL(0), 0);
		wr32(E1000_SRRCTL(0), E1000_SRRCTL_DESCTYPE_ADV_ONEBUF);

		for (i = 0; i < rx_ring->count; i++) {
		struct e1000_rx_desc rx_desc = E1000_RX_DESC(rx_ring, i);
		union e1000_adv_rx_desc *rx_desc;
		struct sk_buff *skb;

		buffer_info = &rx_ring->buffer_info[i];
		rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
		skb = alloc_skb(IGB_RXBUFFER_2048 + NET_IP_ALIGN,
		GFP_KERNEL);
		if (!skb) {
		@@ -1382,11 +1389,11 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
		goto err_nomem;
		}
		skb_reserve(skb, NET_IP_ALIGN);
		rx_ring->buffer_info[i].skb = skb;
		rx_ring->buffer_info[i].dma =
		pci_map_single(pdev, skb->data, IGB_RXBUFFER_2048,
		buffer_info->skb = skb;
		buffer_info->dma = pci_map_single(pdev, skb->data,
		IGB_RXBUFFER_2048,
		PCI_DMA_FROMDEVICE);
		rx_desc->buffer_addr = cpu_to_le64(rx_ring->buffer_info[i].dma);
		rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
		memset(skb->data, 0x00, skb->len);
		}

drivers/net/igb/igb_main.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -994,7 +994,7 @@ void igb_reset(struct igb_adapter *adapter)
		/* the tx fifo also stores 16 bytes of information about the tx
		* but don't include ethernet FCS because hardware appends it */
		min_tx_space = (adapter->max_frame_size +
		sizeof(struct e1000_tx_desc) -
		sizeof(union e1000_adv_tx_desc) -
		ETH_FCS_LEN) * 2;
		min_tx_space = ALIGN(min_tx_space, 1024);
		min_tx_space >>= 10;
		@@ -1704,7 +1704,7 @@ int igb_setup_tx_resources(struct igb_adapter *adapter,
		memset(tx_ring->buffer_info, 0, size);

		/* round up to nearest 4K */
		tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
		tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
		tx_ring->size = ALIGN(tx_ring->size, 4096);

		tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
		@@ -1773,7 +1773,7 @@ static void igb_configure_tx(struct igb_adapter *adapter)
		struct igb_ring *ring = &adapter->tx_ring[i];
		j = ring->reg_idx;
		wr32(E1000_TDLEN(j),
		ring->count * sizeof(struct e1000_tx_desc));
		ring->count * sizeof(union e1000_adv_tx_desc));
		tdba = ring->dma;
		wr32(E1000_TDBAL(j),
		tdba & 0x00000000ffffffffULL);