[U-Boot] [PATCH 2/5] e1000: Restructure and streamline PCI device probing
Kyle Moffett
Kyle.D.Moffett at boeing.com
Mon Sep 13 17:52:23 CEST 2010
By allocating the e1000 device structures much earlier, we can easily
generate better error messages and siginficantly clean things up.
The only user-visable change (aside from reworded error messages) is
that a detected e1000 device which fails to initialize due to software
or hardware error will still be allocated a device number.
As one example, consider a system with 2 e1000 PCI devices where the
first controller has a corrupted EEPROM. Using the old code the
second controller would be "e1000#0", while with this change it would be
"e1000#1".
This change should hopefully make such EEPROM errors much more
straightforward to handle correctly in boot scripts and the like.
It is also necessary for a followup patch which allows SPI programming
of an e1000 controller's EEPROM even if the checksum is invalid.
Signed-off-by: Kyle Moffett <Kyle.D.Moffett at boeing.com>
---
drivers/net/e1000.c | 105 +++++++++++++++++++++++++++------------------------
drivers/net/e1000.h | 3 +
2 files changed, 59 insertions(+), 49 deletions(-)
diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c
index 28cedf7..f6c9be5 100644
--- a/drivers/net/e1000.c
+++ b/drivers/net/e1000.c
@@ -65,7 +65,7 @@ static struct e1000_rx_desc *rx_base;
static int tx_tail;
static int rx_tail, rx_last;
-static struct pci_device_id supported[] = {
+static struct pci_device_id e1000_supported[] = {
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82542},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82543GC_FIBER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82543GC_COPPER},
@@ -4746,7 +4746,7 @@ e1000_set_media_type(struct e1000_hw *hw)
**/
static int
-e1000_sw_init(struct eth_device *nic, int cardnum)
+e1000_sw_init(struct eth_device *nic)
{
struct e1000_hw *hw = (typeof(hw)) nic->priv;
int result;
@@ -5145,43 +5145,55 @@ You should omit the last argument struct pci_device * for a non-PCI NIC
int
e1000_initialize(bd_t * bis)
{
+ unsigned int i;
pci_dev_t devno;
- int card_number = 0;
- struct eth_device *nic = NULL;
- struct e1000_hw *hw = NULL;
- u32 iobase;
- int idx = 0;
- u32 PciCommandWord;
DEBUGFUNC();
- while (1) { /* Find PCI device(s) */
- if ((devno = pci_find_devices(supported, idx++)) < 0) {
- break;
- }
+ /* Find and probe all the matching PCI devices */
+ for (i = 0; (devno = pci_find_devices(e1000_supported, i)) >= 0; i++) {
+ u32 val;
- pci_read_config_dword(devno, PCI_BASE_ADDRESS_0, &iobase);
- iobase &= ~0xf; /* Mask the bits that say "this is an io addr" */
- DEBUGOUT("e1000#%d: iobase 0x%08x\n", card_number, iobase);
-
- pci_write_config_dword(devno, PCI_COMMAND,
- PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
- /* Check if I/O accesses and Bus Mastering are enabled. */
- pci_read_config_dword(devno, PCI_COMMAND, &PciCommandWord);
- if (!(PciCommandWord & PCI_COMMAND_MEMORY)) {
- printf("Error: Can not enable MEM access.\n");
- continue;
- } else if (!(PciCommandWord & PCI_COMMAND_MASTER)) {
- printf("Error: Can not enable Bus Mastering.\n");
+ /*
+ * These will never get freed due to errors, this allows us to
+ * perform SPI EEPROM programming from U-boot, for example.
+ */
+ struct eth_device *nic = malloc(sizeof(*nic));
+ struct e1000_hw *hw = malloc(sizeof(*hw));
+ if (!nic || !hw) {
+ printf("e1000#%u: Out of Memory!\n", i);
+ free(nic);
+ free(hw);
continue;
}
- nic = (struct eth_device *) malloc(sizeof (*nic));
- hw = (struct e1000_hw *) malloc(sizeof (*hw));
+ /* Assign the passed-in values */
+ hw->cardnum = i;
hw->pdev = devno;
+ hw->nic = nic;
nic->priv = hw;
- sprintf(nic->name, "e1000#%d", card_number);
+ /* Generate a card name */
+ sprintf(nic->name, "e1000#%u", hw->cardnum);
+
+ /* Print a debug message with the IO base address */
+ pci_read_config_dword(devno, PCI_BASE_ADDRESS_0, &val);
+ DEBUGOUT("%s: iobase 0x%08x\n", nic->name, val & 0xfffffff0);
+
+ /* Try to enable I/O accesses and bus-mastering */
+ val = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+ pci_write_config_dword(devno, PCI_COMMAND, val);
+
+ /* Make sure it worked */
+ pci_read_config_dword(devno, PCI_COMMAND, &val);
+ if (!(val & PCI_COMMAND_MEMORY)) {
+ printf("%s: ERROR: Can't enable I/O memory\n", nic->name);
+ continue;
+ }
+ if (!(val & PCI_COMMAND_MASTER)) {
+ printf("%s: ERROR: Can't enable bus-mastering\n", nic->name);
+ continue;
+ }
/* Are these variables needed? */
hw->fc = e1000_fc_default;
@@ -5189,50 +5201,45 @@ e1000_initialize(bd_t * bis)
hw->autoneg_failed = 0;
hw->autoneg = 1;
hw->get_link_status = TRUE;
- hw->hw_addr =
- pci_map_bar(devno, PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
+ hw->hw_addr = pci_map_bar(devno, PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
hw->mac_type = e1000_undefined;
/* MAC and Phy settings */
- if (e1000_sw_init(nic, card_number) < 0) {
- free(hw);
- free(nic);
- return 0;
+ if (e1000_sw_init(nic) < 0) {
+ printf("%s: ERROR: Software init failed\n", nic->name);
+ continue;
}
if (e1000_check_phy_reset_block(hw))
- printf("phy reset block error \n");
+ printf("%s: ERROR: PHY Reset is blocked!\n", nic->name);
+
+ /* Basic init was OK, reset the hardware */
e1000_reset_hw(hw);
+
+ /* Validate the EEPROM and get chipset information */
#if !(defined(CONFIG_AP1000) || defined(CONFIG_MVBC_1G))
if (e1000_init_eeprom_params(hw)) {
- printf("The EEPROM Checksum Is Not Valid\n");
- free(hw);
- free(nic);
- return 0;
+ printf("%s: ERROR: EEPROM is invalid!\n", nic->name);
+ continue;
}
if (e1000_validate_eeprom_checksum(nic) < 0) {
- printf("The EEPROM Checksum Is Not Valid\n");
- free(hw);
- free(nic);
- return 0;
+ printf("%s: ERROR: EEPROM checksum is bad!\n", nic->name);
+ continue;
}
#endif
e1000_read_mac_addr(nic);
-
- /* get the bus type information */
e1000_get_bus_type(hw);
printf("e1000: %02x:%02x:%02x:%02x:%02x:%02x\n",
nic->enetaddr[0], nic->enetaddr[1], nic->enetaddr[2],
nic->enetaddr[3], nic->enetaddr[4], nic->enetaddr[5]);
+ /* Set up the function pointers and register the device */
nic->init = e1000_init;
nic->recv = e1000_poll;
nic->send = e1000_transmit;
nic->halt = e1000_disable;
-
eth_register(nic);
-
- card_number++;
}
- return card_number;
+
+ return i;
}
diff --git a/drivers/net/e1000.h b/drivers/net/e1000.h
index 8597e23..8573511 100644
--- a/drivers/net/e1000.h
+++ b/drivers/net/e1000.h
@@ -1043,6 +1043,9 @@ typedef enum {
/* Structure containing variables used by the shared code (e1000_hw.c) */
struct e1000_hw {
+ struct eth_device *nic;
+ unsigned int cardnum;
+
pci_dev_t pdev;
uint8_t *hw_addr;
e1000_mac_type mac_type;
--
1.7.1
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