/**
* e1000_configure_rx - Configure 8254x Receive Unit after Reset
* @adapter: board private structure
*
* Configure the Rx unit of the MAC after a reset.
**/
static void e1000e_configure_rx ( struct e1000_adapter *adapter )
{
struct e1000_hw *hw = &adapter->hw;
uint32_t rctl;
DBGP ( "e1000_configure_rx\n" );
/* disable receives while setting up the descriptors */
rctl = E1000_READ_REG ( hw, E1000_RCTL );
E1000_WRITE_REG ( hw, E1000_RCTL, rctl & ~E1000_RCTL_EN );
e1e_flush();
mdelay(10);
adapter->rx_curr = 0;
/* Setup the HW Rx Head and Tail Descriptor Pointers and
* the Base and Length of the Rx Descriptor Ring */
E1000_WRITE_REG ( hw, E1000_RDBAL(0), virt_to_bus ( adapter->rx_base ) );
E1000_WRITE_REG ( hw, E1000_RDBAH(0), 0 );
E1000_WRITE_REG ( hw, E1000_RDLEN(0), adapter->rx_ring_size );
E1000_WRITE_REG ( hw, E1000_RDH(0), 0 );
E1000_WRITE_REG ( hw, E1000_RDT(0), NUM_RX_DESC - 1 );
/* Enable Receives */
rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_SZ_2048 |
E1000_RCTL_MPE;
E1000_WRITE_REG ( hw, E1000_RCTL, rctl );
e1e_flush();
DBG ( "E1000_RDBAL(0): %#08x\n", E1000_READ_REG ( hw, E1000_RDBAL(0) ) );
DBG ( "E1000_RDLEN(0): %d\n", E1000_READ_REG ( hw, E1000_RDLEN(0) ) );
DBG ( "E1000_RCTL: %#08x\n", E1000_READ_REG ( hw, E1000_RCTL ) );
}
/**
* e1000e_irq_enable - Enable default interrupt generation settings
**/
static void e1000e_irq_enable(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
ew32(IMS, IMS_ENABLE_MASK);
e1e_flush();
}
/**
* e1000e_irq_disable - Mask off interrupt generation on the NIC
**/
static void e1000e_irq_disable(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
ew32(IMC, ~0);
e1e_flush();
}
/**
* intelConfigureRx - Configure Receive Unit after Reset
* @adapter: board private structure
*
* Configure the Rx unit of the MAC after a reset.
**/
void IntelMausi::intelConfigureRx(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
u32 rctl, rxcsum, ctrl_ext;
/* disable receives while setting up the descriptors */
rctl = intelReadMem32(E1000_RCTL);
intelFlush();
usleep_range(10000, 20000);
/* set the Receive Delay Timer Register */
intelWriteMem32(E1000_RDTR, adapter->rx_int_delay);
/* irq moderation */
intelWriteMem32(E1000_RADV, adapter->rx_abs_int_delay);
/* Set interrupt throttle value. */
intelWriteMem32(E1000_ITR, intrThrValue);
/* Auto-Mask interrupts upon ICR access. */
ctrl_ext = intelReadMem32(E1000_CTRL_EXT);
ctrl_ext |= E1000_CTRL_EXT_IAME;
intelWriteMem32(E1000_IAM, 0xffffffff);
intelWriteMem32(E1000_CTRL_EXT, ctrl_ext);
e1e_flush();
/* Setup the HW Rx Head and Tail Descriptor Pointers and
* the Base and Length of the Rx Descriptor Ring
*/
intelInitRxRing();
/* Enable Receive Checksum Offload for TCP and UDP */
rxcsum = intelReadMem32(E1000_RXCSUM);
rxcsum |= E1000_RXCSUM_TUOFL;
intelWriteMem32(E1000_RXCSUM, rxcsum);
/* With jumbo frames, excessive C-state transition latencies result
* in dropped transactions.
*/
if (mtu > ETH_DATA_LEN) {
//u32 lat = ((intelReadMem32(E1000_PBA) & E1000_PBA_RXA_MASK) * 1024 - adapter->max_frame_size) * 8 / 1000;
if (adapter->flags & FLAG_IS_ICH) {
u32 rxdctl = intelReadMem32(E1000_RXDCTL(0));
intelWriteMem32(E1000_RXDCTL(0), rxdctl | 0x3);
}
//pm_qos_update_request(&adapter->netdev->pm_qos_req, lat);
} else {
//pm_qos_update_request(&adapter->netdev->pm_qos_req, PM_QOS_DEFAULT_VALUE);
}
intelWriteMem32(E1000_RCTL, rctl);
}
/**
* e1000_transmit - Transmit a packet
*
* @v netdev Network device
* @v iobuf I/O buffer
*
* @ret rc Returns 0 on success, negative on failure
*/
static int e1000e_transmit ( struct net_device *netdev, struct io_buffer *iobuf )
{
struct e1000_adapter *adapter = netdev_priv( netdev );
struct e1000_hw *hw = &adapter->hw;
uint32_t tx_curr = adapter->tx_tail;
struct e1000_tx_desc *tx_curr_desc;
DBGP ("e1000_transmit\n");
if ( adapter->tx_fill_ctr == NUM_TX_DESC ) {
DBG ("TX overflow\n");
return -ENOBUFS;
}
/* Save pointer to iobuf we have been given to transmit,
netdev_tx_complete() will need it later
*/
adapter->tx_iobuf[tx_curr] = iobuf;
tx_curr_desc = ( void * ) ( adapter->tx_base ) +
( tx_curr * sizeof ( *adapter->tx_base ) );
DBG ( "tx_curr_desc = %#08lx\n", virt_to_bus ( tx_curr_desc ) );
DBG ( "tx_curr_desc + 16 = %#08lx\n", virt_to_bus ( tx_curr_desc ) + 16 );
DBG ( "iobuf->data = %#08lx\n", virt_to_bus ( iobuf->data ) );
/* Add the packet to TX ring
*/
tx_curr_desc->buffer_addr = virt_to_bus ( iobuf->data );
tx_curr_desc->upper.data = 0;
tx_curr_desc->lower.data = adapter->txd_cmd | iob_len ( iobuf );
DBG ( "TX fill: %d tx_curr: %d addr: %#08lx len: %zd\n", adapter->tx_fill_ctr,
tx_curr, virt_to_bus ( iobuf->data ), iob_len ( iobuf ) );
/* Point to next free descriptor */
adapter->tx_tail = ( adapter->tx_tail + 1 ) % NUM_TX_DESC;
adapter->tx_fill_ctr++;
/* Write new tail to NIC, making packet available for transmit
*/
E1000_WRITE_REG ( hw, E1000_TDT(0), adapter->tx_tail );
e1e_flush();
return 0;
}
/**
* e1000_mng_write_cmd_header - Writes manageability command header
* @hw: pointer to the HW structure
* @hdr: pointer to the host interface command header
*
* Writes the command header after does the checksum calculation.
**/
s32 e1000_mng_write_cmd_header(struct e1000_hw *hw,
struct e1000_host_mng_command_header *hdr)
{
u16 i, length = sizeof(struct e1000_host_mng_command_header);
/* Write the whole command header structure with new checksum. */
hdr->checksum = e1000_calculate_checksum((u8 *)hdr, length);
length >>= 2;
/* Write the relevant command block into the ram area. */
for (i = 0; i < length; i++) {
E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, i, *((u32 *)hdr + i));
e1e_flush();
}
return 0;
}
/**
* e1000_close - Disables a network interface
*
* @v netdev network interface device structure
*
**/
static void e1000e_close ( struct net_device *netdev )
{
struct e1000_adapter *adapter = netdev_priv ( netdev );
struct e1000_hw *hw = &adapter->hw;
uint32_t rctl;
uint32_t icr;
DBGP ( "e1000_close\n" );
/* Acknowledge interrupts */
icr = E1000_READ_REG ( hw, E1000_ICR );
e1000e_irq_disable ( adapter );
/* disable receives */
rctl = E1000_READ_REG ( hw, E1000_RCTL );
E1000_WRITE_REG ( hw, E1000_RCTL, rctl & ~E1000_RCTL_EN );
e1e_flush();
e1000e_reset ( adapter );
e1000e_free_tx_resources ( adapter );
e1000e_free_rx_resources ( adapter );
}
static int e1000_intr_test(struct e1000_adapter *adapter, u64 *data)
{
struct net_device *netdev = adapter->netdev;
struct e1000_hw *hw = &adapter->hw;
u32 mask;
u32 shared_int = 1;
u32 irq = adapter->pdev->irq;
int i;
int ret_val = 0;
int int_mode = E1000E_INT_MODE_LEGACY;
*data = 0;
/* NOTE: we don't test MSI/MSI-X interrupts here, yet */
if (adapter->int_mode == E1000E_INT_MODE_MSIX) {
int_mode = adapter->int_mode;
e1000e_reset_interrupt_capability(adapter);
adapter->int_mode = E1000E_INT_MODE_LEGACY;
e1000e_set_interrupt_capability(adapter);
}
/* Hook up test interrupt handler just for this test */
if (!request_irq(irq, e1000_test_intr, IRQF_PROBE_SHARED, netdev->name,
netdev)) {
shared_int = 0;
} else if (request_irq(irq, e1000_test_intr, IRQF_SHARED,
netdev->name, netdev)) {
*data = 1;
ret_val = -1;
goto out;
}
e_info("testing %s interrupt\n", (shared_int ? "shared" : "unshared"));
/* Disable all the interrupts */
ew32(IMC, 0xFFFFFFFF);
e1e_flush();
usleep_range(10000, 20000);
/* Test each interrupt */
for (i = 0; i < 10; i++) {
/* Interrupt to test */
mask = 1 << i;
if (adapter->flags & FLAG_IS_ICH) {
switch (mask) {
case E1000_ICR_RXSEQ:
continue;
case 0x00000100:
if (adapter->hw.mac.type == e1000_ich8lan ||
adapter->hw.mac.type == e1000_ich9lan)
continue;
break;
default:
break;
}
}
if (!shared_int) {
/*
* Disable the interrupt to be reported in
* the cause register and then force the same
* interrupt and see if one gets posted. If
* an interrupt was posted to the bus, the
* test failed.
*/
adapter->test_icr = 0;
ew32(IMC, mask);
ew32(ICS, mask);
e1e_flush();
usleep_range(10000, 20000);
if (adapter->test_icr & mask) {
*data = 3;
break;
}
}
/*
* Enable the interrupt to be reported in
* the cause register and then force the same
* interrupt and see if one gets posted. If
* an interrupt was not posted to the bus, the
* test failed.
*/
adapter->test_icr = 0;
ew32(IMS, mask);
ew32(ICS, mask);
e1e_flush();
usleep_range(10000, 20000);
if (!(adapter->test_icr & mask)) {
*data = 4;
break;
}
if (!shared_int) {
/*
* Disable the other interrupts to be reported in
* the cause register and then force the other
* interrupts and see if any get posted. If
* an interrupt was posted to the bus, the
* test failed.
*/
adapter->test_icr = 0;
ew32(IMC, ~mask & 0x00007FFF);
ew32(ICS, ~mask & 0x00007FFF);
e1e_flush();
usleep_range(10000, 20000);
if (adapter->test_icr) {
*data = 5;
break;
}
}
}
/* Disable all the interrupts */
ew32(IMC, 0xFFFFFFFF);
e1e_flush();
usleep_range(10000, 20000);
/* Unhook test interrupt handler */
free_irq(irq, netdev);
out:
if (int_mode == E1000E_INT_MODE_MSIX) {
e1000e_reset_interrupt_capability(adapter);
adapter->int_mode = int_mode;
e1000e_set_interrupt_capability(adapter);
}
return ret_val;
}
/**
* e1000_configure_tx - Configure 8254x Transmit Unit after Reset
* @adapter: board private structure
*
* Configure the Tx unit of the MAC after a reset.
**/
static void e1000e_configure_tx ( struct e1000_adapter *adapter )
{
struct e1000_hw *hw = &adapter->hw;
u32 tctl, tipg, tarc;
u32 ipgr1, ipgr2;
DBGP ( "e1000_configure_tx\n" );
/* disable transmits while setting up the descriptors */
tctl = E1000_READ_REG ( hw, E1000_TCTL );
E1000_WRITE_REG ( hw, E1000_TCTL, tctl & ~E1000_TCTL_EN );
e1e_flush();
mdelay(10);
E1000_WRITE_REG ( hw, E1000_TDBAH(0), 0 );
E1000_WRITE_REG ( hw, E1000_TDBAL(0), virt_to_bus ( adapter->tx_base ) );
E1000_WRITE_REG ( hw, E1000_TDLEN(0), adapter->tx_ring_size );
DBG ( "E1000_TDBAL(0): %#08x\n", E1000_READ_REG ( hw, E1000_TDBAL(0) ) );
DBG ( "E1000_TDLEN(0): %d\n", E1000_READ_REG ( hw, E1000_TDLEN(0) ) );
/* Setup the HW Tx Head and Tail descriptor pointers */
E1000_WRITE_REG ( hw, E1000_TDH(0), 0 );
E1000_WRITE_REG ( hw, E1000_TDT(0), 0 );
adapter->tx_head = 0;
adapter->tx_tail = 0;
adapter->tx_fill_ctr = 0;
/* Set the default values for the Tx Inter Packet Gap timer */
tipg = DEFAULT_82543_TIPG_IPGT_COPPER; /* 8 */
ipgr1 = DEFAULT_82543_TIPG_IPGR1; /* 8 */
ipgr2 = DEFAULT_82543_TIPG_IPGR2; /* 6 */
if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /* 7 */
tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
ew32(TIPG, tipg);
/* Program the Transmit Control Register */
tctl = er32(TCTL);
tctl &= ~E1000_TCTL_CT;
tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
(E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
tarc = er32(TARC(0));
/*
* set the speed mode bit, we'll clear it if we're not at
* gigabit link later
*/
#define SPEED_MODE_BIT (1 << 21)
tarc |= SPEED_MODE_BIT;
ew32(TARC(0), tarc);
}
/* errata: program both queues to unweighted RR */
if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
tarc = er32(TARC(0));
tarc |= 1;
ew32(TARC(0), tarc);
tarc = er32(TARC(1));
tarc |= 1;
ew32(TARC(1), tarc);
}
/* Setup Transmit Descriptor Settings for eop descriptor */
adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
/* enable Report Status bit */
adapter->txd_cmd |= E1000_TXD_CMD_RS;
/*
* enable transmits in the hardware, need to do this
* after setting TARC(0)
*/
tctl |= E1000_TCTL_EN;
ew32(TCTL, tctl);
e1e_flush();
e1000e_config_collision_dist(hw);
}