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e1000: Restructure and streamline PCI device probing

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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@boeing.com>
Cc: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Kyle Moffett 2011-10-18 11:05:26 +00:00 • committed by Wolfgang Denk
parent 987b43a1d7
commit d60626f8c1
2 changed files with 74 additions and 71 deletions
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126
drivers/net/e1000.c
View file

@ -66,7 +66,7 @@ static struct e1000_rx_desc *rx_base;
static int tx_tail; static int tx_tail;
static int rx_tail, rx_last; 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_82542},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82543GC_FIBER}, {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82543GC_FIBER},
{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82543GC_COPPER}, {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82543GC_COPPER},
@ -4761,7 +4761,7 @@ e1000_set_media_type(struct e1000_hw *hw)
**/ **/
static int 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; struct e1000_hw *hw = (typeof(hw)) nic->priv;
int result; int result;
@ -4779,7 +4779,7 @@ e1000_sw_init(struct eth_device *nic, int cardnum)
/* identify the MAC */ /* identify the MAC */
result = e1000_set_mac_type(hw); result = e1000_set_mac_type(hw);
if (result) { if (result) {
E1000_ERR("Unknown MAC Type\n"); E1000_ERR(hw->nic, "Unknown MAC Type\n");
return result; return result;
} }
@ -5111,9 +5111,9 @@ e1000_init(struct eth_device *nic, bd_t * bis)
if (ret_val < 0) { if (ret_val < 0) {
if ((ret_val == -E1000_ERR_NOLINK) || if ((ret_val == -E1000_ERR_NOLINK) ||
(ret_val == -E1000_ERR_TIMEOUT)) { (ret_val == -E1000_ERR_TIMEOUT)) {
E1000_ERR("Valid Link not detected\n"); E1000_ERR(hw->nic, "Valid Link not detected\n");
} else { } else {
E1000_ERR("Hardware Initialization Failed\n"); E1000_ERR(hw->nic, "Hardware Initialization Failed\n");
} }
return 0; return 0;
} }
@ -5162,57 +5162,59 @@ You should omit the last argument struct pci_device * for a non-PCI NIC
int int
e1000_initialize(bd_t * bis) e1000_initialize(bd_t * bis)
{ {
unsigned int i;
pci_dev_t devno; 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(); DEBUGFUNC();
while (1) { /* Find PCI device(s) */ /* Find and probe all the matching PCI devices */
if ((devno = pci_find_devices(supported, idx++)) < 0) { for (i = 0; (devno = pci_find_devices(e1000_supported, i)) >= 0; i++) {
break; u32 val;
}
pci_read_config_dword(devno, PCI_BASE_ADDRESS_0, &iobase); /*
iobase &= ~0xf; /* Mask the bits that say "this is an io addr" */ * These will never get freed due to errors, this allows us to
DEBUGOUT("e1000#%d: iobase 0x%08x\n", card_number, iobase); * perform SPI EEPROM programming from U-boot, for example.
*/
pci_write_config_dword(devno, PCI_COMMAND, struct eth_device *nic = malloc(sizeof(*nic));
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); struct e1000_hw *hw = malloc(sizeof(*hw));
/* Check if I/O accesses and Bus Mastering are enabled. */ if (!nic || !hw) {
pci_read_config_dword(devno, PCI_COMMAND, &PciCommandWord); printf("e1000#%u: Out of Memory!\n", i);
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");
continue;
}
nic = (struct eth_device *) malloc(sizeof (*nic));
if (!nic) {
printf("Error: e1000 - Can not alloc memory\n");
return 0;
}
hw = (struct e1000_hw *) malloc(sizeof (*hw));
if (!hw) {
free(nic); free(nic);
printf("Error: e1000 - Can not alloc memory\n"); free(hw);
return 0; continue;
} }
/* Make sure all of the fields are initially zeroed */
memset(nic, 0, sizeof(*nic)); memset(nic, 0, sizeof(*nic));
memset(hw, 0, sizeof(*hw)); memset(hw, 0, sizeof(*hw));
/* Assign the passed-in values */
hw->cardnum = i;
hw->pdev = devno; hw->pdev = devno;
hw->nic = nic;
nic->priv = hw; 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);
E1000_DBG(nic, "iobase 0x%08x\n", 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)) {
E1000_ERR(nic, "Can't enable I/O memory\n");
continue;
}
if (!(val & PCI_COMMAND_MASTER)) {
E1000_ERR(nic, "Can't enable bus-mastering\n");
continue;
}
/* Are these variables needed? */ /* Are these variables needed? */
hw->fc = e1000_fc_default; hw->fc = e1000_fc_default;
@ -5220,50 +5222,46 @@ e1000_initialize(bd_t * bis)
hw->autoneg_failed = 0; hw->autoneg_failed = 0;
hw->autoneg = 1; hw->autoneg = 1;
hw->get_link_status = TRUE; hw->get_link_status = TRUE;
hw->hw_addr = hw->hw_addr = pci_map_bar(devno, PCI_BASE_ADDRESS_0,
pci_map_bar(devno, PCI_BASE_ADDRESS_0, PCI_REGION_MEM); PCI_REGION_MEM);
hw->mac_type = e1000_undefined; hw->mac_type = e1000_undefined;
/* MAC and Phy settings */ /* MAC and Phy settings */
if (e1000_sw_init(nic, card_number) < 0) { if (e1000_sw_init(nic) < 0) {
free(hw); E1000_ERR(nic, "Software init failed\n");
free(nic); continue;
return 0;
} }
if (e1000_check_phy_reset_block(hw)) if (e1000_check_phy_reset_block(hw))
printf("phy reset block error \n"); E1000_ERR(nic, "PHY Reset is blocked!\n");
/* Basic init was OK, reset the hardware */
e1000_reset_hw(hw); e1000_reset_hw(hw);
/* Validate the EEPROM and get chipset information */
#if !(defined(CONFIG_AP1000) || defined(CONFIG_MVBC_1G)) #if !(defined(CONFIG_AP1000) || defined(CONFIG_MVBC_1G))
if (e1000_init_eeprom_params(hw)) { if (e1000_init_eeprom_params(hw)) {
printf("The EEPROM Checksum Is Not Valid\n"); E1000_ERR(nic, "EEPROM is invalid!\n");
free(hw); continue;
free(nic);
return 0;
} }
if (e1000_validate_eeprom_checksum(nic) < 0) { if (e1000_validate_eeprom_checksum(nic) < 0) {
printf("The EEPROM Checksum Is Not Valid\n"); E1000_ERR(nic, "EEPROM checksum is bad!\n");
free(hw); continue;
free(nic);
return 0;
} }
#endif #endif
e1000_read_mac_addr(nic); e1000_read_mac_addr(nic);
/* get the bus type information */
e1000_get_bus_type(hw); e1000_get_bus_type(hw);
printf("e1000: %02x:%02x:%02x:%02x:%02x:%02x\n", printf("e1000: %02x:%02x:%02x:%02x:%02x:%02x\n ",
nic->enetaddr[0], nic->enetaddr[1], nic->enetaddr[2], nic->enetaddr[0], nic->enetaddr[1], nic->enetaddr[2],
nic->enetaddr[3], nic->enetaddr[4], nic->enetaddr[5]); nic->enetaddr[3], nic->enetaddr[4], nic->enetaddr[5]);
/* Set up the function pointers and register the device */
nic->init = e1000_init; nic->init = e1000_init;
nic->recv = e1000_poll; nic->recv = e1000_poll;
nic->send = e1000_transmit; nic->send = e1000_transmit;
nic->halt = e1000_disable; nic->halt = e1000_disable;
eth_register(nic); eth_register(nic);
card_number++;
} }
return card_number;
return i;
} }

19
drivers/net/e1000.h
View file

@ -41,16 +41,18 @@
#include <asm/io.h> #include <asm/io.h>
#include <pci.h> #include <pci.h>
#define E1000_ERR(args...) printf("e1000: " args) #define E1000_ERR(NIC, fmt, args...) \
printf("e1000: %s: ERROR: " fmt, (NIC)->name ,##args)
#ifdef E1000_DEBUG #ifdef E1000_DEBUG
#define E1000_DBG(args...) printf("e1000: " args) #define E1000_DBG(NIC, fmt, args...) \
#define DEBUGOUT(fmt,args...) printf(fmt ,##args) printf("e1000: %s: DEBUG: " fmt, (NIC)->name ,##args)
#define DEBUGFUNC() printf("%s\n", __FUNCTION__); #define DEBUGOUT(fmt, args...) printf(fmt ,##args)
#define DEBUGFUNC() printf("%s\n", __func__);
#else #else
#define E1000_DBG(args...) #define E1000_DBG(HW, args...) do { } while (0)
#define DEBUGFUNC() #define DEBUGFUNC() do { } while (0)
#define DEBUGOUT(fmt,args...) #define DEBUGOUT(fmt, args...) do { } while (0)
#endif #endif
/* Forward declarations of structures used by the shared code */ /* Forward declarations of structures used by the shared code */
@ -1047,6 +1049,9 @@ typedef enum {
/* Structure containing variables used by the shared code (e1000_hw.c) */ /* Structure containing variables used by the shared code (e1000_hw.c) */
struct e1000_hw { struct e1000_hw {
struct eth_device *nic;
unsigned int cardnum;
pci_dev_t pdev; pci_dev_t pdev;
uint8_t *hw_addr; uint8_t *hw_addr;
e1000_mac_type mac_type; e1000_mac_type mac_type;