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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 <dhananjay@netxen.com> Signed-off-by: Milan Bag <mbag@netxen.com> Signed-off-by: Wen Xiong <wenxiong@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Dhananjay Phadke
Jeff Garzik
parent
d14e37e120
commit
96acb6eb8e
@ -952,6 +952,24 @@ struct netxen_adapter {
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int (*stop_port) (struct netxen_adapter *);
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}; /* netxen_adapter structure */
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/*
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* NetXen dma watchdog control structure
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*
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* Bit 0 : enabled => R/O: 1 watchdog active, 0 inactive
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* Bit 1 : disable_request => 1 req disable dma watchdog
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* Bit 2 : enable_request => 1 req enable dma watchdog
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* Bit 3-31 : unused
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*/
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#define netxen_set_dma_watchdog_disable_req(config_word) \
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_netxen_set_bits(config_word, 1, 1, 1)
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#define netxen_set_dma_watchdog_enable_req(config_word) \
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_netxen_set_bits(config_word, 2, 1, 1)
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#define netxen_get_dma_watchdog_enabled(config_word) \
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((config_word) & 0x1)
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#define netxen_get_dma_watchdog_disabled(config_word) \
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(((config_word) >> 1) & 0x1)
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/* Max number of xmit producer threads that can run simultaneously */
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#define MAX_XMIT_PRODUCERS 16
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@ -1031,8 +1049,8 @@ int netxen_nic_erase_pxe(struct netxen_adapter *adapter);
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/* Functions from netxen_nic_init.c */
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void netxen_free_adapter_offload(struct netxen_adapter *adapter);
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int netxen_initialize_adapter_offload(struct netxen_adapter *adapter);
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void netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val);
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void netxen_load_firmware(struct netxen_adapter *adapter);
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int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val);
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int netxen_load_firmware(struct netxen_adapter *adapter);
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int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose);
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int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp);
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int netxen_rom_fast_read_words(struct netxen_adapter *adapter, int addr,
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@ -1234,6 +1252,62 @@ static inline void get_brd_name_by_type(u32 type, char *name)
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name = "Unknown";
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}
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static inline int
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dma_watchdog_shutdown_request(struct netxen_adapter *adapter)
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{
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u32 ctrl;
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/* check if already inactive */
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if (netxen_nic_hw_read_wx(adapter,
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NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), &ctrl, 4))
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printk(KERN_ERR "failed to read dma watchdog status\n");
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if (netxen_get_dma_watchdog_enabled(ctrl) == 0)
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return 1;
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/* Send the disable request */
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netxen_set_dma_watchdog_disable_req(ctrl);
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netxen_crb_writelit_adapter(adapter,
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NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), ctrl);
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return 0;
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}
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static inline int
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dma_watchdog_shutdown_poll_result(struct netxen_adapter *adapter)
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{
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u32 ctrl;
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if (netxen_nic_hw_read_wx(adapter,
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NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), &ctrl, 4))
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printk(KERN_ERR "failed to read dma watchdog status\n");
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return ((netxen_get_dma_watchdog_enabled(ctrl) == 0) &&
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(netxen_get_dma_watchdog_disabled(ctrl) == 0));
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}
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static inline int
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dma_watchdog_wakeup(struct netxen_adapter *adapter)
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{
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u32 ctrl;
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if (netxen_nic_hw_read_wx(adapter,
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NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), &ctrl, 4))
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printk(KERN_ERR "failed to read dma watchdog status\n");
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if (netxen_get_dma_watchdog_enabled(ctrl))
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return 1;
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/* send the wakeup request */
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netxen_set_dma_watchdog_enable_req(ctrl);
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netxen_crb_writelit_adapter(adapter,
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NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), ctrl);
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return 0;
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}
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int netxen_is_flash_supported(struct netxen_adapter *adapter);
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int netxen_get_flash_mac_addr(struct netxen_adapter *adapter, u64 mac[]);
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extern void netxen_change_ringparam(struct netxen_adapter *adapter);
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@ -687,4 +687,6 @@ enum {
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#define PCIE_MAX_MASTER_SPLIT (0x14048)
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#define NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL (0x14)
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#endif /* __NETXEN_NIC_HDR_H_ */
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@ -377,7 +377,7 @@ int netxen_nic_hw_resources(struct netxen_adapter *adapter)
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recv_crb_registers[ctx].
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crb_rcvpeg_state));
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while (state != PHAN_PEG_RCV_INITIALIZED && loops < 20) {
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udelay(100);
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msleep(1);
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/* Window 1 call */
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state = readl(NETXEN_CRB_NORMALIZE(adapter,
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recv_crb_registers
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@ -394,7 +394,7 @@ int netxen_nic_hw_resources(struct netxen_adapter *adapter)
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}
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adapter->intr_scheme = readl(
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NETXEN_CRB_NORMALIZE(adapter, CRB_NIC_CAPABILITIES_FW));
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printk(KERN_NOTICE "%s: FW capabilities:0x%x\n", netdev->name,
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printk(KERN_NOTICE "%s: FW capabilities:0x%x\n", netxen_nic_driver_name,
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adapter->intr_scheme);
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DPRINTK(INFO, "Receive Peg ready too. starting stuff\n");
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@ -701,7 +701,7 @@ void netxen_nic_pci_change_crbwindow(struct netxen_adapter *adapter, u32 wndw)
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adapter->curr_window = 0;
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}
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void netxen_load_firmware(struct netxen_adapter *adapter)
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int netxen_load_firmware(struct netxen_adapter *adapter)
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{
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int i;
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u32 data, size = 0;
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@ -713,15 +713,24 @@ void netxen_load_firmware(struct netxen_adapter *adapter)
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writel(1, NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_CAS_RST));
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for (i = 0; i < size; i++) {
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if (netxen_rom_fast_read(adapter, flashaddr, (int *)&data) != 0) {
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DPRINTK(ERR,
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"Error in netxen_rom_fast_read(). Will skip"
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"loading flash image\n");
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return;
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}
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int retries = 10;
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if (netxen_rom_fast_read(adapter, flashaddr, (int *)&data) != 0)
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return -EIO;
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off = netxen_nic_pci_set_window(adapter, memaddr);
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addr = pci_base_offset(adapter, off);
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writel(data, addr);
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do {
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if (readl(addr) == data)
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break;
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msleep(100);
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writel(data, addr);
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} while (--retries);
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if (!retries) {
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printk(KERN_ERR "%s: firmware load aborted, write failed at 0x%x\n",
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netxen_nic_driver_name, memaddr);
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return -EIO;
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}
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flashaddr += 4;
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memaddr += 4;
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}
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@ -731,7 +740,7 @@ void netxen_load_firmware(struct netxen_adapter *adapter)
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NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_CHIP_CLK_CTRL));
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writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_CAS_RST));
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udelay(100);
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return 0;
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}
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int
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@ -407,10 +407,7 @@ static inline int do_rom_fast_write(struct netxen_adapter *adapter, int addr,
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static inline int
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do_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
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{
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if (jiffies > (last_schedule_time + (8 * HZ))) {
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last_schedule_time = jiffies;
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schedule();
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}
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cond_resched();
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netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
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netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
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@ -856,10 +853,10 @@ int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose)
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netxen_nic_pci_change_crbwindow(adapter, 1);
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}
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if (init_delay == 1) {
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ssleep(1);
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msleep(2000);
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init_delay = 0;
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}
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msleep(1);
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msleep(20);
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}
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kfree(buf);
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@ -935,10 +932,6 @@ int netxen_initialize_adapter_offload(struct netxen_adapter *adapter)
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void netxen_free_adapter_offload(struct netxen_adapter *adapter)
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{
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if (adapter->dummy_dma.addr) {
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writel(0, NETXEN_CRB_NORMALIZE(adapter,
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CRB_HOST_DUMMY_BUF_ADDR_HI));
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writel(0, NETXEN_CRB_NORMALIZE(adapter,
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CRB_HOST_DUMMY_BUF_ADDR_LO));
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pci_free_consistent(adapter->ahw.pdev,
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NETXEN_HOST_DUMMY_DMA_SIZE,
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adapter->dummy_dma.addr,
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@ -947,25 +940,32 @@ void netxen_free_adapter_offload(struct netxen_adapter *adapter)
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}
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}
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void netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val)
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int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val)
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{
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u32 val = 0;
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int loops = 0;
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int retries = 30;
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if (!pegtune_val) {
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val = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
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while (val != PHAN_INITIALIZE_COMPLETE &&
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val != PHAN_INITIALIZE_ACK && loops < 200000) {
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udelay(100);
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schedule();
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val =
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readl(NETXEN_CRB_NORMALIZE
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do {
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val = readl(NETXEN_CRB_NORMALIZE
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(adapter, CRB_CMDPEG_STATE));
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loops++;
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pegtune_val = readl(NETXEN_CRB_NORMALIZE
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(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
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if (val == PHAN_INITIALIZE_COMPLETE ||
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val == PHAN_INITIALIZE_ACK)
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return 0;
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msleep(1000);
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} while (--retries);
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if (!retries) {
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printk(KERN_WARNING "netxen_phantom_init: init failed, "
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"pegtune_val=%x\n", pegtune_val);
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return -1;
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}
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if (val != PHAN_INITIALIZE_COMPLETE)
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printk("WARNING: Initial boot wait loop failed...\n");
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}
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return 0;
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}
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int netxen_nic_rx_has_work(struct netxen_adapter *adapter)
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@ -1122,6 +1122,7 @@ netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
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adapter->stats.csummed++;
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skb->ip_summed = CHECKSUM_UNNECESSARY;
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}
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skb->dev = netdev;
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if (desc_ctx == RCV_DESC_LRO_CTXID) {
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/* True length was only available on the last pkt */
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skb_put(skb, buffer->lro_length);
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@ -1226,6 +1227,7 @@ u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max)
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NETXEN_CRB_NORMALIZE(adapter,
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recv_crb_registers[adapter->portnum].
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crb_rcv_status_consumer));
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wmb();
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}
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return count;
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@ -1278,11 +1280,13 @@ int netxen_process_cmd_ring(unsigned long data)
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if (skb && (cmpxchg(&buffer->skb, skb, 0) == skb)) {
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pci_unmap_single(pdev, frag->dma, frag->length,
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PCI_DMA_TODEVICE);
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frag->dma = 0ULL;
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for (i = 1; i < buffer->frag_count; i++) {
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DPRINTK(INFO, "getting fragment no %d\n", i);
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frag++; /* Get the next frag */
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pci_unmap_page(pdev, frag->dma, frag->length,
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PCI_DMA_TODEVICE);
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frag->dma = 0ULL;
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}
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adapter->stats.skbfreed++;
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@ -1448,6 +1452,7 @@ void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx, u32 ringid)
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writel(msg,
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DB_NORMALIZE(adapter,
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NETXEN_RCV_PRODUCER_OFFSET));
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wmb();
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}
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}
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}
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@ -507,11 +507,14 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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if (val == 0x55555555) {
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/* This is the first boot after power up */
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netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
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if (!(val & 0x4)) {
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val |= 0x4;
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netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
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netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
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}
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if (!(val & 0x4)) {
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val |= 0x4;
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netxen_nic_write_w0(adapter, NETXEN_PCIE_REG(0x4), val);
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netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(0x4), &val);
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if (!(val & 0x4))
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printk(KERN_ERR "%s: failed to set MSI bit in PCI-e reg\n",
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netxen_nic_driver_name);
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}
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val = readl(NETXEN_CRB_NORMALIZE(adapter,
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NETXEN_ROMUSB_GLB_SW_RESET));
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printk(KERN_INFO"NetXen: read 0x%08x for reset reg.\n",val);
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@ -523,11 +526,10 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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err = -ENODEV;
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goto err_out_free_dev;
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}
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/* clear the register for future unloads/loads */
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writel(0, NETXEN_CRB_NORMALIZE(adapter,
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NETXEN_CAM_RAM(0x1fc)));
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}
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/* clear the register for future unloads/loads */
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writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
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printk(KERN_INFO "State: 0x%0x\n",
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readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
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@ -545,13 +547,6 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
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/* Handshake with the card before we register the devices. */
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netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
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/* leave the hw in the same state as reboot */
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writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
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netxen_pinit_from_rom(adapter, 0);
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udelay(500);
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netxen_load_firmware(adapter);
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netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
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}
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/*
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@ -642,8 +637,8 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
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struct netxen_rx_buffer *buffer;
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struct netxen_recv_context *recv_ctx;
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struct netxen_rcv_desc_ctx *rcv_desc;
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int i;
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int ctxid, ring;
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int i, ctxid, ring;
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static int init_firmware_done = 0;
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adapter = pci_get_drvdata(pdev);
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if (adapter == NULL)
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@ -651,30 +646,20 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
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netdev = adapter->netdev;
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netxen_nic_disable_int(adapter);
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if (adapter->irq)
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free_irq(adapter->irq, adapter);
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unregister_netdev(netdev);
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if (adapter->stop_port)
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adapter->stop_port(adapter);
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if ((adapter->flags & NETXEN_NIC_MSI_ENABLED))
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pci_disable_msi(pdev);
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netxen_nic_disable_int(adapter);
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if (adapter->portnum == 0)
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netxen_free_adapter_offload(adapter);
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if (adapter->irq)
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free_irq(adapter->irq, adapter);
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if(adapter->portnum == 0) {
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/* leave the hw in the same state as reboot */
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writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
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netxen_pinit_from_rom(adapter, 0);
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udelay(500);
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netxen_load_firmware(adapter);
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netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
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}
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if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
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if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
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init_firmware_done++;
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netxen_free_hw_resources(adapter);
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}
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for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
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recv_ctx = &adapter->recv_ctx[ctxid];
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@ -694,17 +679,73 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
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}
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}
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unregister_netdev(netdev);
|
||||
if (adapter->flags & NETXEN_NIC_MSI_ENABLED)
|
||||
pci_disable_msi(pdev);
|
||||
|
||||
vfree(adapter->cmd_buf_arr);
|
||||
|
||||
pci_disable_device(pdev);
|
||||
|
||||
if (adapter->portnum == 0) {
|
||||
if (init_firmware_done) {
|
||||
dma_watchdog_shutdown_request(adapter);
|
||||
msleep(100);
|
||||
i = 100;
|
||||
while ((dma_watchdog_shutdown_poll_result(adapter) != 1) && i) {
|
||||
printk(KERN_INFO "dma_watchdog_shutdown_poll still in progress\n");
|
||||
msleep(100);
|
||||
i--;
|
||||
}
|
||||
|
||||
if (i == 0) {
|
||||
printk(KERN_ERR "dma_watchdog_shutdown_request failed\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* clear the register for future unloads/loads */
|
||||
writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
|
||||
printk(KERN_INFO "State: 0x%0x\n",
|
||||
readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
|
||||
|
||||
/* leave the hw in the same state as reboot */
|
||||
writel(0, NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
|
||||
if (netxen_pinit_from_rom(adapter, 0))
|
||||
return;
|
||||
msleep(1);
|
||||
if (netxen_load_firmware(adapter))
|
||||
return;
|
||||
netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
|
||||
}
|
||||
|
||||
/* clear the register for future unloads/loads */
|
||||
writel(0, NETXEN_CRB_NORMALIZE(adapter, NETXEN_CAM_RAM(0x1fc)));
|
||||
printk(KERN_INFO "State: 0x%0x\n",
|
||||
readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE)));
|
||||
|
||||
dma_watchdog_shutdown_request(adapter);
|
||||
msleep(100);
|
||||
i = 100;
|
||||
while ((dma_watchdog_shutdown_poll_result(adapter) != 1) && i) {
|
||||
printk(KERN_INFO "dma_watchdog_shutdown_poll still in progress\n");
|
||||
msleep(100);
|
||||
i--;
|
||||
}
|
||||
|
||||
if (i) {
|
||||
netxen_free_adapter_offload(adapter);
|
||||
} else {
|
||||
printk(KERN_ERR "failed to dma shutdown\n");
|
||||
return;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
iounmap(adapter->ahw.db_base);
|
||||
iounmap(adapter->ahw.pci_base0);
|
||||
iounmap(adapter->ahw.pci_base1);
|
||||
iounmap(adapter->ahw.pci_base2);
|
||||
|
||||
pci_release_regions(pdev);
|
||||
pci_disable_device(pdev);
|
||||
pci_set_drvdata(pdev, NULL);
|
||||
|
||||
free_netdev(netdev);
|
||||
@ -801,7 +842,7 @@ static int netxen_nic_close(struct net_device *netdev)
|
||||
if (buffrag->dma) {
|
||||
pci_unmap_single(adapter->pdev, buffrag->dma,
|
||||
buffrag->length, PCI_DMA_TODEVICE);
|
||||
buffrag->dma = (u64) NULL;
|
||||
buffrag->dma = 0ULL;
|
||||
}
|
||||
for (j = 0; j < cmd_buff->frag_count; j++) {
|
||||
buffrag++;
|
||||
@ -809,7 +850,7 @@ static int netxen_nic_close(struct net_device *netdev)
|
||||
pci_unmap_page(adapter->pdev, buffrag->dma,
|
||||
buffrag->length,
|
||||
PCI_DMA_TODEVICE);
|
||||
buffrag->dma = (u64) NULL;
|
||||
buffrag->dma = 0ULL;
|
||||
}
|
||||
}
|
||||
/* Free the skb we received in netxen_nic_xmit_frame */
|
||||
@ -819,8 +860,10 @@ static int netxen_nic_close(struct net_device *netdev)
|
||||
}
|
||||
cmd_buff++;
|
||||
}
|
||||
FLUSH_SCHEDULED_WORK();
|
||||
del_timer_sync(&adapter->watchdog_timer);
|
||||
if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC) {
|
||||
FLUSH_SCHEDULED_WORK();
|
||||
del_timer_sync(&adapter->watchdog_timer);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1259,6 +1302,7 @@ static void __exit netxen_exit_module(void)
|
||||
/*
|
||||
* Wait for some time to allow the dma to drain, if any.
|
||||
*/
|
||||
msleep(100);
|
||||
pci_unregister_driver(&netxen_driver);
|
||||
destroy_workqueue(netxen_workq);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user