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Date: Thu, 07 Aug 2008 02:10:08 -0400
From: Jeff Garzik <jeff@...zik.org>
To: Dhananjay Phadke <dhananjay@...xen.com>
CC: netdev@...r.kernel.org
Subject: Re: [PATCH 6/7] netxen: fix mac addr setup
Dhananjay Phadke wrote:
> For NX3031 mac addr should be read from firmware. mac addr in flash
> is still valid, but can be overridden by firmware if running in
> virtualization environment.
>
> For old revisions, mac addr is retrieved directly from flash.
>
> Signed-off-by: Dhananjay Phadke <dhananjay@...xen.com>
> ---
> drivers/net/netxen/netxen_nic.h | 3 +-
> drivers/net/netxen/netxen_nic_hw.c | 51 ++++++++++++++++++------
> drivers/net/netxen/netxen_nic_main.c | 63 ++++++++++++++++++-----------
> drivers/net/netxen/netxen_nic_phan_reg.h | 2 +
> 4 files changed, 81 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
> index de180f2..de877ff 100644
> --- a/drivers/net/netxen/netxen_nic.h
> +++ b/drivers/net/netxen/netxen_nic.h
> @@ -1614,7 +1614,8 @@ dma_watchdog_wakeup(struct netxen_adapter *adapter)
>
>
> int netxen_is_flash_supported(struct netxen_adapter *adapter);
> -int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 mac[]);
> +int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 *mac);
> +int netxen_p3_get_mac_addr(struct netxen_adapter *adapter, __le64 *mac);
> extern void netxen_change_ringparam(struct netxen_adapter *adapter);
> extern int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr,
> int *valp);
> diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
> index 4259f3f..d6d3b20 100644
> --- a/drivers/net/netxen/netxen_nic_hw.c
> +++ b/drivers/net/netxen/netxen_nic_hw.c
> @@ -733,31 +733,56 @@ static int netxen_get_flash_block(struct netxen_adapter *adapter, int base,
> return 0;
> }
>
> -int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 mac[])
> +int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, __le64 *mac)
> {
> - __le32 *pmac = (__le32 *) & mac[0];
> + __le32 *pmac = (__le32 *) mac;
> + u32 offset;
>
> - if (netxen_get_flash_block(adapter,
> - NETXEN_USER_START +
> - offsetof(struct netxen_new_user_info,
> - mac_addr),
> - FLASH_NUM_PORTS * sizeof(u64), pmac) == -1) {
> + offset = NETXEN_USER_START +
> + offsetof(struct netxen_new_user_info, mac_addr) +
> + adapter->portnum * sizeof(u64);
> +
> + if (netxen_get_flash_block(adapter, offset, sizeof(u64), pmac) == -1)
> return -1;
> - }
> +
> if (*mac == cpu_to_le64(~0ULL)) {
> +
> + offset = NETXEN_USER_START_OLD +
> + offsetof(struct netxen_user_old_info, mac_addr) +
> + adapter->portnum * sizeof(u64);
> +
> if (netxen_get_flash_block(adapter,
> - NETXEN_USER_START_OLD +
> - offsetof(struct netxen_user_old_info,
> - mac_addr),
> - FLASH_NUM_PORTS * sizeof(u64),
> - pmac) == -1)
> + offset, sizeof(u64), pmac) == -1)
> return -1;
> +
> if (*mac == cpu_to_le64(~0ULL))
> return -1;
> }
> return 0;
> }
>
> +int netxen_p3_get_mac_addr(struct netxen_adapter *adapter, __le64 *mac)
> +{
> + uint32_t crbaddr, mac_hi, mac_lo;
> + int pci_func = adapter->ahw.pci_func;
> +
> + crbaddr = CRB_MAC_BLOCK_START +
> + (4 * ((pci_func/2) * 3)) + (4 * (pci_func & 1));
> +
> + adapter->hw_read_wx(adapter, crbaddr, &mac_lo, 4);
> + adapter->hw_read_wx(adapter, crbaddr+4, &mac_hi, 4);
> +
> + mac_hi = cpu_to_le32(mac_hi);
> + mac_lo = cpu_to_le32(mac_lo);
> +
> + if (pci_func & 1)
> + *mac = ((mac_lo >> 16) | ((u64)mac_hi << 16));
> + else
> + *mac = ((mac_lo) | ((u64)mac_hi << 32));
> +
> + return 0;
> +}
> +
> #define CRB_WIN_LOCK_TIMEOUT 100000000
>
> static int crb_win_lock(struct netxen_adapter *adapter)
> diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
> index 7615c71..ecb26f9 100644
> --- a/drivers/net/netxen/netxen_nic_main.c
> +++ b/drivers/net/netxen/netxen_nic_main.c
> @@ -501,6 +501,42 @@ static void netxen_init_msix_entries(struct netxen_adapter *adapter)
> adapter->msix_entries[i].entry = i;
> }
>
> +static int
> +netxen_read_mac_addr(struct netxen_adapter *adapter)
> +{
> + int i;
> + unsigned char *p;
> + __le64 mac_addr;
> + DECLARE_MAC_BUF(mac);
> + struct net_device *netdev = adapter->netdev;
> +
> + if (netxen_is_flash_supported(adapter) != 0)
> + return -EIO;
> +
> + if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
> + if (netxen_p3_get_mac_addr(adapter, &mac_addr) != 0)
> + return -EIO;
> + } else {
> + if (netxen_get_flash_mac_addr(adapter, &mac_addr) != 0)
> + return -EIO;
> + }
> +
> + p = (unsigned char *)&mac_addr;
> + for (i = 0; i < 6; i++)
> + netdev->dev_addr[i] = *(p + 5 - i);
> +
> + memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);
> +
> + if (!is_valid_ether_addr(netdev->perm_addr)) {
> + printk(KERN_ERR "%s: Bad MAC address %s.\n",
> + netxen_nic_driver_name,
> + print_mac(mac, netdev->dev_addr));
> + } else
> + adapter->macaddr_set(adapter, netdev->dev_addr);
> +
> + return 0;
> +}
> +
> /*
> * netxen_nic_probe()
> *
> @@ -529,10 +565,8 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> unsigned long mem_base, mem_len, db_base, db_len, pci_len0 = 0;
> int i = 0, err;
> int first_driver, first_boot;
> - __le64 mac_addr[FLASH_NUM_PORTS + 1];
> u32 val;
> int pci_func_id = PCI_FUNC(pdev->devfn);
> - DECLARE_MAC_BUF(mac);
> struct netxen_legacy_intr_set *legacy_intrp;
> uint8_t revision_id;
>
> @@ -904,28 +938,9 @@ request_msi:
> INIT_WORK(&adapter->watchdog_task, netxen_watchdog_task);
> INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
>
> - if (netxen_is_flash_supported(adapter) == 0 &&
> - netxen_get_flash_mac_addr(adapter, mac_addr) == 0) {
> - unsigned char *p;
> -
> - p = (unsigned char *)&mac_addr[adapter->portnum];
> - netdev->dev_addr[0] = *(p + 5);
> - netdev->dev_addr[1] = *(p + 4);
> - netdev->dev_addr[2] = *(p + 3);
> - netdev->dev_addr[3] = *(p + 2);
> - netdev->dev_addr[4] = *(p + 1);
> - netdev->dev_addr[5] = *(p + 0);
> -
> - memcpy(netdev->perm_addr, netdev->dev_addr,
> - netdev->addr_len);
> - if (!is_valid_ether_addr(netdev->perm_addr)) {
> - printk(KERN_ERR "%s: Bad MAC address %s.\n",
> - netxen_nic_driver_name,
> - print_mac(mac, netdev->dev_addr));
> - } else {
> - adapter->macaddr_set(adapter, netdev->dev_addr);
> - }
> - }
> + err = netxen_read_mac_addr(adapter);
> + if (err)
> + goto err_out_disable_msi;
NAK -- you don't want to fail simply because a MAC address could not be
obtained using the normal means.
The user is still allowed to specify a MAC address before they 'up' the
network interface.
Jeff
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