Staging: et131x: tidy up initpci code

Perform some easy tidying so we can see what needs to be done next

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2009-10-06 15:47:41 +01:00 committed by Greg Kroah-Hartman
parent 7f2bf9488d
commit c431e3c064
3 changed files with 193 additions and 253 deletions

View file

@ -132,16 +132,60 @@ MODULE_PARM_DESC(et131x_speed_set,
"Set Link speed and dublex manually (0-5) [0] \n 1 : 10Mb Half-Duplex \n 2 : 10Mb Full-Duplex \n 3 : 100Mb Half-Duplex \n 4 : 100Mb Full-Duplex \n 5 : 1000Mb Full-Duplex \n 0 : Auto Speed Auto Dublex");
/**
* et131x_find_adapter - Find the adapter and get all the assigned resources
* et131x_hwaddr_init - set up the MAC Address on the ET1310
* @adapter: pointer to our private adapter structure
*
* Returns 0 on success, errno on failure (as defined in errno.h)
*/
int et131x_find_adapter(struct et131x_adapter *adapter, struct pci_dev *pdev)
void et131x_hwaddr_init(struct et131x_adapter *adapter)
{
int result;
uint8_t maxPayload = 0;
uint8_t read_size_reg;
/* If have our default mac from init and no mac address from
* EEPROM then we need to generate the last octet and set it on the
* device
*/
if (adapter->PermanentAddress[0] == 0x00 &&
adapter->PermanentAddress[1] == 0x00 &&
adapter->PermanentAddress[2] == 0x00 &&
adapter->PermanentAddress[3] == 0x00 &&
adapter->PermanentAddress[4] == 0x00 &&
adapter->PermanentAddress[5] == 0x00) {
/*
* We need to randomly generate the last octet so we
* decrease our chances of setting the mac address to
* same as another one of our cards in the system
*/
get_random_bytes(&adapter->CurrentAddress[5], 1);
/*
* We have the default value in the register we are
* working with so we need to copy the current
* address into the permanent address
*/
memcpy(adapter->PermanentAddress,
adapter->CurrentAddress, ETH_ALEN);
} else {
/* We do not have an override address, so set the
* current address to the permanent address and add
* it to the device
*/
memcpy(adapter->CurrentAddress,
adapter->PermanentAddress, ETH_ALEN);
}
}
/**
* et131x_pci_init - initial PCI setup
* @adapter: pointer to our private adapter structure
* @pdev: our PCI device
*
* Perform the initial setup of PCI registers and if possible initialise
* the MAC address. At this point the I/O registers have yet to be mapped
*/
static int et131x_pci_init(struct et131x_adapter *adapter,
struct pci_dev *pdev)
{
int i;
u8 max_payload;
u8 read_size_reg;
/* Allow disabling of Non-Maskable Interrupts in I/O space, to
* support validation.
@ -164,31 +208,27 @@ int et131x_find_adapter(struct et131x_adapter *adapter, struct pci_dev *pdev)
/* Let's set up the PORT LOGIC Register. First we need to know what
* the max_payload_size is
*/
result = pci_read_config_byte(pdev, ET1310_PCI_MAX_PYLD, &maxPayload);
if (result != PCIBIOS_SUCCESSFUL) {
if (pci_read_config_byte(pdev, ET1310_PCI_MAX_PYLD, &max_payload)) {
dev_err(&pdev->dev,
"Could not read PCI config space for Max Payload Size\n");
return -EIO;
}
/* Program the Ack/Nak latency and replay timers */
maxPayload &= 0x07; /* Only the lower 3 bits are valid */
max_payload &= 0x07; /* Only the lower 3 bits are valid */
if (maxPayload < 2) {
const uint16_t AckNak[2] = { 0x76, 0xD0 };
const uint16_t Replay[2] = { 0x1E0, 0x2ED };
if (max_payload < 2) {
static const u16 AckNak[2] = { 0x76, 0xD0 };
static const u16 Replay[2] = { 0x1E0, 0x2ED };
result = pci_write_config_word(pdev, ET1310_PCI_ACK_NACK,
AckNak[maxPayload]);
if (result != PCIBIOS_SUCCESSFUL) {
if (pci_write_config_word(pdev, ET1310_PCI_ACK_NACK,
AckNak[max_payload])) {
dev_err(&pdev->dev,
"Could not write PCI config space for ACK/NAK\n");
return -EIO;
}
result = pci_write_config_word(pdev, ET1310_PCI_REPLAY,
Replay[maxPayload]);
if (result != PCIBIOS_SUCCESSFUL) {
if (pci_write_config_word(pdev, ET1310_PCI_REPLAY,
Replay[max_payload])) {
dev_err(&pdev->dev,
"Could not write PCI config space for Replay Timer\n");
return -EIO;
@ -198,16 +238,14 @@ int et131x_find_adapter(struct et131x_adapter *adapter, struct pci_dev *pdev)
/* l0s and l1 latency timers. We are using default values.
* Representing 001 for L0s and 010 for L1
*/
result = pci_write_config_byte(pdev, ET1310_PCI_L0L1LATENCY, 0x11);
if (result != PCIBIOS_SUCCESSFUL) {
if (pci_write_config_byte(pdev, ET1310_PCI_L0L1LATENCY, 0x11)) {
dev_err(&pdev->dev,
"Could not write PCI config space for Latency Timers\n");
return -EIO;
}
/* Change the max read size to 2k */
result = pci_read_config_byte(pdev, 0x51, &read_size_reg);
if (result != PCIBIOS_SUCCESSFUL) {
if (pci_read_config_byte(pdev, 0x51, &read_size_reg)) {
dev_err(&pdev->dev,
"Could not read PCI config space for Max read size\n");
return -EIO;
@ -216,8 +254,7 @@ int et131x_find_adapter(struct et131x_adapter *adapter, struct pci_dev *pdev)
read_size_reg &= 0x8f;
read_size_reg |= 0x40;
result = pci_write_config_byte(pdev, 0x51, read_size_reg);
if (result != PCIBIOS_SUCCESSFUL) {
if (pci_write_config_byte(pdev, 0x51, read_size_reg)) {
dev_err(&pdev->dev,
"Could not write PCI config space for Max read size\n");
return -EIO;
@ -226,19 +263,19 @@ int et131x_find_adapter(struct et131x_adapter *adapter, struct pci_dev *pdev)
/* Get MAC address from config space if an eeprom exists, otherwise
* the MAC address there will not be valid
*/
if (adapter->has_eeprom) {
int i;
if (!adapter->has_eeprom) {
et131x_hwaddr_init(adapter);
return 0;
}
for (i = 0; i < ETH_ALEN; i++) {
result = pci_read_config_byte(
pdev, ET1310_PCI_MAC_ADDRESS + i,
adapter->PermanentAddress + i);
if (result != PCIBIOS_SUCCESSFUL) {
dev_err(&pdev->dev, ";Could not read PCI config space for MAC address\n");
return -EIO;
}
for (i = 0; i < ETH_ALEN; i++) {
if (pci_read_config_byte(pdev, ET1310_PCI_MAC_ADDRESS + i,
adapter->PermanentAddress + i)) {
dev_err(&pdev->dev, "Could not read PCI config space for MAC address\n");
return -EIO;
}
}
memcpy(adapter->CurrentAddress, adapter->PermanentAddress, ETH_ALEN);
return 0;
}
@ -432,45 +469,6 @@ int et131x_adapter_setup(struct et131x_adapter *etdev)
; return status;
}
/**
* et131x_setup_hardware_properties - set up the MAC Address on the ET1310
* @adapter: pointer to our private adapter structure
*/
void et131x_setup_hardware_properties(struct et131x_adapter *adapter)
{
/* If have our default mac from registry and no mac address from
* EEPROM then we need to generate the last octet and set it on the
* device
*/
if (adapter->PermanentAddress[0] == 0x00 &&
adapter->PermanentAddress[1] == 0x00 &&
adapter->PermanentAddress[2] == 0x00 &&
adapter->PermanentAddress[3] == 0x00 &&
adapter->PermanentAddress[4] == 0x00 &&
adapter->PermanentAddress[5] == 0x00) {
/*
* We need to randomly generate the last octet so we
* decrease our chances of setting the mac address to
* same as another one of our cards in the system
*/
get_random_bytes(&adapter->CurrentAddress[5], 1);
/*
* We have the default value in the register we are
* working with so we need to copy the current
* address into the permanent address
*/
memcpy(adapter->PermanentAddress,
adapter->CurrentAddress, ETH_ALEN);
} else {
/* We do not have an override address, so set the
* current address to the permanent address and add
* it to the device
*/
memcpy(adapter->CurrentAddress,
adapter->PermanentAddress, ETH_ALEN);
}
}
/**
* et131x_soft_reset - Issue a soft reset to the hardware, complete for ET1310
* @adapter: pointer to our private adapter structure
@ -523,36 +521,32 @@ void et131x_align_allocated_memory(struct et131x_adapter *adapter,
*/
int et131x_adapter_memory_alloc(struct et131x_adapter *adapter)
{
int status = 0;
int status;
do {
/* Allocate memory for the Tx Ring */
status = et131x_tx_dma_memory_alloc(adapter);
if (status != 0) {
dev_err(&adapter->pdev->dev,
"et131x_tx_dma_memory_alloc FAILED\n");
break;
}
/* Allocate memory for the Tx Ring */
status = et131x_tx_dma_memory_alloc(adapter);
if (status != 0) {
dev_err(&adapter->pdev->dev,
"et131x_tx_dma_memory_alloc FAILED\n");
return status;
}
/* Receive buffer memory allocation */
status = et131x_rx_dma_memory_alloc(adapter);
if (status != 0) {
dev_err(&adapter->pdev->dev,
"et131x_rx_dma_memory_alloc FAILED\n");
et131x_tx_dma_memory_free(adapter);
return status;
}
/* Receive buffer memory allocation */
status = et131x_rx_dma_memory_alloc(adapter);
if (status != 0) {
dev_err(&adapter->pdev->dev,
"et131x_rx_dma_memory_alloc FAILED\n");
et131x_tx_dma_memory_free(adapter);
break;
}
/* Init receive data structures */
status = et131x_init_recv(adapter);
if (status != 0) {
dev_err(&adapter->pdev->dev,
"et131x_init_recv FAILED\n");
et131x_tx_dma_memory_free(adapter);
et131x_rx_dma_memory_free(adapter);
break;
}
} while (0);
/* Init receive data structures */
status = et131x_init_recv(adapter);
if (status != 0) {
dev_err(&adapter->pdev->dev,
"et131x_init_recv FAILED\n");
et131x_tx_dma_memory_free(adapter);
et131x_rx_dma_memory_free(adapter);
}
return status;
}
@ -567,22 +561,51 @@ void et131x_adapter_memory_free(struct et131x_adapter *adapter)
et131x_rx_dma_memory_free(adapter);
}
/**
* et131x_config_parse
* et131x_adapter_init
* @etdev: pointer to the private adapter struct
* @pdev: pointer to the PCI device
*
* Parses a configuration from some location (module parameters, for example)
* into the private adapter struct. This really has no sensible analogy in
* Linux as sysfs parameters are dynamic. Several things that were hee could
* go into sysfs, but other stuff like speed handling is part of the mii
* interfaces/ethtool.
* Initialize the data structures for the et131x_adapter object and link
* them together with the platform provided device structures.
*/
void et131x_config_parse(struct et131x_adapter *etdev)
static struct et131x_adapter *et131x_adapter_init(struct net_device *netdev,
struct pci_dev *pdev)
{
static const u8 default_mac[] = { 0x00, 0x05, 0x3d, 0x00, 0x02, 0x00 };
static const u8 duplex[] = { 0, 1, 2, 1, 2, 2 };
static const u16 speed[] = { 0, 10, 10, 100, 100, 1000 };
struct et131x_adapter *etdev;
/* Setup the fundamental net_device and private adapter structure elements */
SET_NETDEV_DEV(netdev, &pdev->dev);
/* Allocate private adapter struct and copy in relevant information */
etdev = netdev_priv(netdev);
etdev->pdev = pci_dev_get(pdev);
etdev->netdev = netdev;
/* Do the same for the netdev struct */
netdev->irq = pdev->irq;
netdev->base_addr = pci_resource_start(pdev, 0);
/* Initialize spinlocks here */
spin_lock_init(&etdev->Lock);
spin_lock_init(&etdev->TCBSendQLock);
spin_lock_init(&etdev->TCBReadyQLock);
spin_lock_init(&etdev->SendHWLock);
spin_lock_init(&etdev->SendWaitLock);
spin_lock_init(&etdev->RcvLock);
spin_lock_init(&etdev->RcvPendLock);
spin_lock_init(&etdev->FbrLock);
spin_lock_init(&etdev->PHYLock);
/* Parse configuration parameters into the private adapter struct */
if (et131x_speed_set)
dev_info(&etdev->pdev->dev,
"Speed set manually to : %d \n", et131x_speed_set);
@ -609,40 +632,10 @@ void et131x_config_parse(struct et131x_adapter *etdev)
etdev->AiForceSpeed = speed[etdev->SpeedDuplex];
etdev->AiForceDpx = duplex[etdev->SpeedDuplex]; /* Auto FDX */
return etdev;
}
/**
* et131x_pci_remove
* @pdev: a pointer to the device's pci_dev structure
*
* Registered in the pci_driver structure, this function is called when the
* PCI subsystem detects that a PCI device which matches the information
* contained in the pci_device_id table has been removed.
*/
void __devexit et131x_pci_remove(struct pci_dev *pdev)
{
struct net_device *netdev;
struct et131x_adapter *adapter;
/* Retrieve the net_device pointer from the pci_dev struct, as well
* as the private adapter struct
*/
netdev = (struct net_device *) pci_get_drvdata(pdev);
adapter = netdev_priv(netdev);
/* Perform device cleanup */
unregister_netdev(netdev);
et131x_adapter_memory_free(adapter);
iounmap(adapter->regs);
pci_dev_put(adapter->pdev);
free_netdev(netdev);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
/**
* et131x_pci_setup - Perform device initialization
* @pdev: a pointer to the device's pci_dev structure
@ -656,34 +649,31 @@ void __devexit et131x_pci_remove(struct pci_dev *pdev)
* a device insertion routine.
*/
int __devinit et131x_pci_setup(struct pci_dev *pdev,
static int __devinit et131x_pci_setup(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int result = 0;
int result = -EBUSY;
int pm_cap;
bool pci_using_dac;
struct net_device *netdev = NULL;
struct et131x_adapter *adapter = NULL;
struct net_device *netdev;
struct et131x_adapter *adapter;
/* Enable the device via the PCI subsystem */
result = pci_enable_device(pdev);
if (result != 0) {
dev_err(&adapter->pdev->dev,
if (pci_enable_device(pdev) != 0) {
dev_err(&pdev->dev,
"pci_enable_device() failed\n");
goto out;
return -EIO;
}
/* Perform some basic PCI checks */
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
dev_err(&adapter->pdev->dev,
dev_err(&pdev->dev,
"Can't find PCI device's base address\n");
result = -ENODEV;
goto out;
goto err_disable;
}
result = pci_request_regions(pdev, DRIVER_NAME);
if (result != 0) {
dev_err(&adapter->pdev->dev,
if (pci_request_regions(pdev, DRIVER_NAME)) {
dev_err(&pdev->dev,
"Can't get PCI resources\n");
goto err_disable;
}
@ -698,27 +688,26 @@ int __devinit et131x_pci_setup(struct pci_dev *pdev,
*/
pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);
if (pm_cap == 0) {
dev_err(&adapter->pdev->dev,
dev_err(&pdev->dev,
"Cannot find Power Management capabilities\n");
result = -EIO;
goto err_release_res;
}
/* Check the DMA addressing support of this device */
if (!pci_set_dma_mask(pdev, 0xffffffffffffffffULL)) {
if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
pci_using_dac = true;
result =
pci_set_consistent_dma_mask(pdev, 0xffffffffffffffffULL);
result = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (result != 0) {
dev_err(&pdev->dev,
"Unable to obtain 64 bit DMA for consistent allocations\n");
goto err_release_res;
}
} else if (!pci_set_dma_mask(pdev, 0xffffffffULL)) {
} else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
pci_using_dac = false;
} else {
dev_err(&adapter->pdev->dev,
dev_err(&pdev->dev,
"No usable DMA addressing method\n");
result = -EIO;
goto err_release_res;
@ -727,87 +716,22 @@ int __devinit et131x_pci_setup(struct pci_dev *pdev,
/* Allocate netdev and private adapter structs */
netdev = et131x_device_alloc();
if (netdev == NULL) {
dev_err(&adapter->pdev->dev,
"Couldn't alloc netdev struct\n");
dev_err(&pdev->dev, "Couldn't alloc netdev struct\n");
result = -ENOMEM;
goto err_release_res;
}
/* Setup the fundamental net_device and private adapter structure elements */
SET_NETDEV_DEV(netdev, &pdev->dev);
/*
if (pci_using_dac) {
netdev->features |= NETIF_F_HIGHDMA;
}
*/
/*
* NOTE - Turn this on when we're ready to deal with SG-DMA
*
* NOTE: According to "Linux Device Drivers", 3rd ed, Rubini et al,
* if checksumming is not performed in HW, then the kernel will not
* use SG.
* From pp 510-511:
*
* "Note that the kernel does not perform scatter/gather I/O to your
* device if it does not also provide some form of checksumming as
* well. The reason is that, if the kernel has to make a pass over a
* fragmented ("nonlinear") packet to calculate the checksum, it
* might as well copy the data and coalesce the packet at the same
* time."
*
* This has been verified by setting the flags below and still not
* receiving a scattered buffer from the network stack, so leave it
* off until checksums are calculated in HW.
*/
/* netdev->features |= NETIF_F_SG; */
/* netdev->features |= NETIF_F_NO_CSUM; */
/* netdev->features |= NETIF_F_LLTX; */
/* Allocate private adapter struct and copy in relevant information */
adapter = netdev_priv(netdev);
adapter->pdev = pci_dev_get(pdev);
adapter->netdev = netdev;
/* Do the same for the netdev struct */
netdev->irq = pdev->irq;
netdev->base_addr = pdev->resource[0].start;
/* Initialize spinlocks here */
spin_lock_init(&adapter->Lock);
spin_lock_init(&adapter->TCBSendQLock);
spin_lock_init(&adapter->TCBReadyQLock);
spin_lock_init(&adapter->SendHWLock);
spin_lock_init(&adapter->SendWaitLock);
spin_lock_init(&adapter->RcvLock);
spin_lock_init(&adapter->RcvPendLock);
spin_lock_init(&adapter->FbrLock);
spin_lock_init(&adapter->PHYLock);
/* Parse configuration parameters into the private adapter struct */
et131x_config_parse(adapter);
/* Find the physical adapter
*
* NOTE: This is the equivalent of the MpFindAdapter() routine; can we
* lump it's init with the device specific init below into a
* single init function?
*/
/* while (et131x_find_adapter(adapter, pdev) != 0); */
et131x_find_adapter(adapter, pdev);
adapter = et131x_adapter_init(netdev, pdev);
/* Initialise the PCI setup for the device */
et131x_pci_init(adapter, pdev);
/* Map the bus-relative registers to system virtual memory */
adapter->regs = ioremap_nocache(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
adapter->regs = pci_ioremap_bar(pdev, 0);
if (adapter->regs == NULL) {
dev_err(&pdev->dev, "Cannot map device registers\n");
result = -ENOMEM;
goto err_free_dev;
}
/* Perform device-specific initialization here (See code below) */
/* If Phy COMA mode was enabled when we went down, disable it here. */
writel(ET_PMCSR_INIT, &adapter->regs->global.pm_csr);
@ -827,20 +751,12 @@ int __devinit et131x_pci_setup(struct pci_dev *pdev,
/* Init send data structures */
et131x_init_send(adapter);
/* Register the interrupt
*
* NOTE - This is being done in the open routine, where most other
* Linux drivers setup IRQ handlers. Make sure device
* interrupts are not turned on before the IRQ is registered!!
*
* What we will do here is setup the task structure for the
* ISR's deferred handler
/*
* Set up the task structure for the ISR's deferred handler
*/
INIT_WORK(&adapter->task, et131x_isr_handler);
/* Determine MAC Address, and copy into the net_device struct */
et131x_setup_hardware_properties(adapter);
/* Copy address into the net_device struct */
memcpy(netdev->dev_addr, adapter->CurrentAddress, ETH_ALEN);
/* Setup et1310 as per the documentation */
@ -879,10 +795,7 @@ int __devinit et131x_pci_setup(struct pci_dev *pdev,
* been initialized, just in case it needs to be quickly restored.
*/
pci_set_drvdata(pdev, netdev);
pci_save_state(adapter->pdev);
out:
return result;
err_mem_free:
@ -896,7 +809,37 @@ err_release_res:
pci_release_regions(pdev);
err_disable:
pci_disable_device(pdev);
goto out;
return result;
}
/**
* et131x_pci_remove
* @pdev: a pointer to the device's pci_dev structure
*
* Registered in the pci_driver structure, this function is called when the
* PCI subsystem detects that a PCI device which matches the information
* contained in the pci_device_id table has been removed.
*/
static void __devexit et131x_pci_remove(struct pci_dev *pdev)
{
struct net_device *netdev;
struct et131x_adapter *adapter;
/* Retrieve the net_device pointer from the pci_dev struct, as well
* as the private adapter struct
*/
netdev = (struct net_device *) pci_get_drvdata(pdev);
adapter = netdev_priv(netdev);
/* Perform device cleanup */
unregister_netdev(netdev);
et131x_adapter_memory_free(adapter);
iounmap(adapter->regs);
pci_dev_put(adapter->pdev);
free_netdev(netdev);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
static struct pci_device_id et131x_pci_table[] __devinitdata = {
@ -945,7 +888,6 @@ static void __exit et131x_cleanup_module(void)
module_init(et131x_init_module);
module_exit(et131x_cleanup_module);
/* Modinfo parameters (filled out using defines from et131x_version.h) */
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_INFO);

View file

@ -67,7 +67,7 @@ void et131x_align_allocated_memory(struct et131x_adapter *adapter,
int et131x_adapter_setup(struct et131x_adapter *adapter);
int et131x_adapter_memory_alloc(struct et131x_adapter *adapter);
void et131x_adapter_memory_free(struct et131x_adapter *adapter);
void et131x_setup_hardware_properties(struct et131x_adapter *adapter);
void et131x_hwaddr_init(struct et131x_adapter *adapter);
void et131x_soft_reset(struct et131x_adapter *adapter);
#endif /* __ET131X_INITPCI_H__ */

View file

@ -622,7 +622,7 @@ int et131x_change_mtu(struct net_device *netdev, int new_mtu)
et131x_init_send(adapter);
et131x_setup_hardware_properties(adapter);
et131x_hwaddr_init(adapter);
memcpy(netdev->dev_addr, adapter->CurrentAddress, ETH_ALEN);
/* Init the device with the new settings */
@ -709,9 +709,7 @@ int et131x_set_mac_addr(struct net_device *netdev, void *new_mac)
et131x_init_send(adapter);
et131x_setup_hardware_properties(adapter);
/* memcpy( netdev->dev_addr, adapter->CurrentAddress, ETH_ALEN ); */
/* blux: no, do not override our nice address */
et131x_hwaddr_init(adapter);
/* Init the device with the new settings */
et131x_adapter_setup(adapter);