From 96acb6eb8effe7c2549909e2ee49f4130f2c167d Mon Sep 17 00:00:00 2001 From: Dhananjay Phadke Date: Mon, 2 Jul 2007 09:37:57 +0530 Subject: RESEND [PATCH 3/3] NetXen: Graceful teardown of interface and hardware upon module unload Resending patch 3/3 only. These changes allow driver close routine to be called during module unload, to clean-up buffers and other software resources, flush queues etc. Also, hardware is reset to pristine state. Signed-off-by: Dhananjay Phadke Signed-off-by: Milan Bag Signed-off-by: Wen Xiong Signed-off-by: Jeff Garzik --- drivers/net/netxen/netxen_nic.h | 78 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 76 insertions(+), 2 deletions(-) (limited to 'drivers/net/netxen/netxen_nic.h') diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h index 6ce93fcbed3..619503742b7 100644 --- a/drivers/net/netxen/netxen_nic.h +++ b/drivers/net/netxen/netxen_nic.h @@ -952,6 +952,24 @@ struct netxen_adapter { int (*stop_port) (struct netxen_adapter *); }; /* netxen_adapter structure */ +/* + * NetXen dma watchdog control structure + * + * Bit 0 : enabled => R/O: 1 watchdog active, 0 inactive + * Bit 1 : disable_request => 1 req disable dma watchdog + * Bit 2 : enable_request => 1 req enable dma watchdog + * Bit 3-31 : unused + */ + +#define netxen_set_dma_watchdog_disable_req(config_word) \ + _netxen_set_bits(config_word, 1, 1, 1) +#define netxen_set_dma_watchdog_enable_req(config_word) \ + _netxen_set_bits(config_word, 2, 1, 1) +#define netxen_get_dma_watchdog_enabled(config_word) \ + ((config_word) & 0x1) +#define netxen_get_dma_watchdog_disabled(config_word) \ + (((config_word) >> 1) & 0x1) + /* Max number of xmit producer threads that can run simultaneously */ #define MAX_XMIT_PRODUCERS 16 @@ -1031,8 +1049,8 @@ int netxen_nic_erase_pxe(struct netxen_adapter *adapter); /* Functions from netxen_nic_init.c */ void netxen_free_adapter_offload(struct netxen_adapter *adapter); int netxen_initialize_adapter_offload(struct netxen_adapter *adapter); -void netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val); -void netxen_load_firmware(struct netxen_adapter *adapter); +int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val); +int netxen_load_firmware(struct netxen_adapter *adapter); int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose); int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp); int netxen_rom_fast_read_words(struct netxen_adapter *adapter, int addr, @@ -1234,6 +1252,62 @@ static inline void get_brd_name_by_type(u32 type, char *name) name = "Unknown"; } +static inline int +dma_watchdog_shutdown_request(struct netxen_adapter *adapter) +{ + u32 ctrl; + + /* check if already inactive */ + if (netxen_nic_hw_read_wx(adapter, + NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), &ctrl, 4)) + printk(KERN_ERR "failed to read dma watchdog status\n"); + + if (netxen_get_dma_watchdog_enabled(ctrl) == 0) + return 1; + + /* Send the disable request */ + netxen_set_dma_watchdog_disable_req(ctrl); + netxen_crb_writelit_adapter(adapter, + NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), ctrl); + + return 0; +} + +static inline int +dma_watchdog_shutdown_poll_result(struct netxen_adapter *adapter) +{ + u32 ctrl; + + if (netxen_nic_hw_read_wx(adapter, + NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), &ctrl, 4)) + printk(KERN_ERR "failed to read dma watchdog status\n"); + + return ((netxen_get_dma_watchdog_enabled(ctrl) == 0) && + (netxen_get_dma_watchdog_disabled(ctrl) == 0)); +} + +static inline int +dma_watchdog_wakeup(struct netxen_adapter *adapter) +{ + u32 ctrl; + + if (netxen_nic_hw_read_wx(adapter, + NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), &ctrl, 4)) + printk(KERN_ERR "failed to read dma watchdog status\n"); + + if (netxen_get_dma_watchdog_enabled(ctrl)) + return 1; + + /* send the wakeup request */ + netxen_set_dma_watchdog_enable_req(ctrl); + + netxen_crb_writelit_adapter(adapter, + NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), ctrl); + + return 0; +} + + int netxen_is_flash_supported(struct netxen_adapter *adapter); int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, u64 mac[]); extern void netxen_change_ringparam(struct netxen_adapter *adapter); -- cgit v1.2.3