From: Dhananjay Phadke Date: Tue, 13 Oct 2009 05:31:43 +0000 (+0000) Subject: netxen: annotate register windowing code X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=907fa1201c76f426a13bdff5be2747fb62c2353f;p=openwrt%2Fstaging%2Fblogic.git netxen: annotate register windowing code Use common variables crb_win, ocm_win for all revisions of chip. Signed-off-by: Dhananjay Phadke Signed-off-by: David S. Miller --- diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h index eef9e66becbd..2a42132b9799 100644 --- a/drivers/net/netxen/netxen_nic.h +++ b/drivers/net/netxen/netxen_nic.h @@ -549,7 +549,7 @@ struct netxen_hardware_context { unsigned long pci_len0; u32 ocm_win; - u32 resv1; + u32 crb_win; u8 cut_through; u8 revision_id; @@ -1115,8 +1115,6 @@ struct netxen_adapter { struct pci_dev *pdev; struct list_head mac_list; - u32 curr_window; - u32 crb_win; rwlock_t adapter_lock; spinlock_t tx_clean_lock; diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c index f677752dbe22..37f47660dcdd 100644 --- a/drivers/net/netxen/netxen_nic_hw.c +++ b/drivers/net/netxen/netxen_nic_hw.c @@ -1046,46 +1046,34 @@ int netxen_p3_get_mac_addr(struct netxen_adapter *adapter, __le64 *mac) * Changes the CRB window to the specified window. */ static void -netxen_nic_pci_change_crbwindow_128M(struct netxen_adapter *adapter, u32 wndw) +netxen_nic_pci_set_crbwindow_128M(struct netxen_adapter *adapter, + u32 window) { void __iomem *offset; - u32 tmp; - int count = 0; - uint8_t func = adapter->ahw.pci_func; + int count = 10; + u8 func = adapter->ahw.pci_func; - if (adapter->curr_window == wndw) + if (adapter->ahw.crb_win == window) return; - /* - * Move the CRB window. - * We need to write to the "direct access" region of PCI - * to avoid a race condition where the window register has - * not been successfully written across CRB before the target - * register address is received by PCI. The direct region bypasses - * the CRB bus. - */ + offset = PCI_OFFSET_SECOND_RANGE(adapter, NETXEN_PCIX_PH_REG(PCIE_CRB_WINDOW_REG(func))); - if (wndw & 0x1) - wndw = NETXEN_WINDOW_ONE; + writel(window, offset); + do { + if (window == readl(offset)) + break; - writel(wndw, offset); + if (printk_ratelimit()) + dev_warn(&adapter->pdev->dev, + "failed to set CRB window to %d\n", + (window == NETXEN_WINDOW_ONE)); + udelay(1); - /* MUST make sure window is set before we forge on... */ - while ((tmp = readl(offset)) != wndw) { - printk(KERN_WARNING "%s: %s WARNING: CRB window value not " - "registered properly: 0x%08x.\n", - netxen_nic_driver_name, __func__, tmp); - mdelay(1); - if (count >= 10) - break; - count++; - } + } while (--count > 0); - if (wndw == NETXEN_WINDOW_ONE) - adapter->curr_window = 1; - else - adapter->curr_window = 0; + if (count > 0) + adapter->ahw.crb_win = window; } /* @@ -1140,20 +1128,24 @@ netxen_nic_pci_get_crb_addr_2M(struct netxen_adapter *adapter, ulong *off) static void netxen_nic_pci_set_crbwindow_2M(struct netxen_adapter *adapter, ulong *off) { - u32 win_read; + u32 window; + void __iomem *addr = adapter->ahw.pci_base0 + CRB_WINDOW_2M; - adapter->crb_win = CRB_HI(*off); - writel(adapter->crb_win, (adapter->ahw.pci_base0 + CRB_WINDOW_2M)); - /* - * Read back value to make sure write has gone through before trying - * to use it. - */ - win_read = readl(adapter->ahw.pci_base0 + CRB_WINDOW_2M); - if (win_read != adapter->crb_win) { - printk(KERN_ERR "%s: Written crbwin (0x%x) != " - "Read crbwin (0x%x), off=0x%lx\n", - __func__, adapter->crb_win, win_read, *off); + window = CRB_HI(*off); + + if (adapter->ahw.crb_win == window) + goto done; + + writel(window, addr); + if (readl(addr) != window) { + if (printk_ratelimit()) + dev_warn(&adapter->pdev->dev, + "failed to set CRB window to %d off 0x%lx\n", + window, *off); } + adapter->ahw.crb_win = window; + +done: *off = (*off & MASK(16)) + CRB_INDIRECT_2M + (ulong)adapter->ahw.pci_base0; } @@ -1178,9 +1170,10 @@ netxen_nic_hw_write_wx_128M(struct netxen_adapter *adapter, ulong off, u32 data) } else { /* Window 0 */ write_lock_irqsave(&adapter->adapter_lock, flags); addr = pci_base_offset(adapter, off); - netxen_nic_pci_change_crbwindow_128M(adapter, 0); + netxen_nic_pci_set_crbwindow_128M(adapter, 0); writel(data, addr); - netxen_nic_pci_change_crbwindow_128M(adapter, 1); + netxen_nic_pci_set_crbwindow_128M(adapter, + NETXEN_WINDOW_ONE); write_unlock_irqrestore(&adapter->adapter_lock, flags); } @@ -1207,9 +1200,10 @@ netxen_nic_hw_read_wx_128M(struct netxen_adapter *adapter, ulong off) read_unlock(&adapter->adapter_lock); } else { /* Window 0 */ write_lock_irqsave(&adapter->adapter_lock, flags); - netxen_nic_pci_change_crbwindow_128M(adapter, 0); + netxen_nic_pci_set_crbwindow_128M(adapter, 0); data = readl(addr); - netxen_nic_pci_change_crbwindow_128M(adapter, 1); + netxen_nic_pci_set_crbwindow_128M(adapter, + NETXEN_WINDOW_ONE); write_unlock_irqrestore(&adapter->adapter_lock, flags); } @@ -1460,7 +1454,7 @@ netxen_nic_pci_mem_write_128M(struct netxen_adapter *adapter, correct: write_lock_irqsave(&adapter->adapter_lock, flags); - netxen_nic_pci_change_crbwindow_128M(adapter, 0); + netxen_nic_pci_set_crbwindow_128M(adapter, 0); writel(off_lo, (mem_crb + MIU_TEST_AGT_ADDR_LO)); writel(off_hi, (mem_crb + addr_hi)); @@ -1484,7 +1478,7 @@ correct: } else ret = 0; - netxen_nic_pci_change_crbwindow_128M(adapter, 1); + netxen_nic_pci_set_crbwindow_128M(adapter, NETXEN_WINDOW_ONE); write_unlock_irqrestore(&adapter->adapter_lock, flags); return ret; } @@ -1539,7 +1533,7 @@ netxen_nic_pci_mem_read_128M(struct netxen_adapter *adapter, correct: write_lock_irqsave(&adapter->adapter_lock, flags); - netxen_nic_pci_change_crbwindow_128M(adapter, 0); + netxen_nic_pci_set_crbwindow_128M(adapter, 0); writel(off_lo, (mem_crb + MIU_TEST_AGT_ADDR_LO)); writel(off_hi, (mem_crb + addr_hi)); @@ -1566,7 +1560,7 @@ correct: ret = 0; } - netxen_nic_pci_change_crbwindow_128M(adapter, 1); + netxen_nic_pci_set_crbwindow_128M(adapter, NETXEN_WINDOW_ONE); write_unlock_irqrestore(&adapter->adapter_lock, flags); return ret; @@ -1664,8 +1658,10 @@ netxen_nic_pci_mem_read_2M(struct netxen_adapter *adapter, goto correct; } - if (ADDR_IN_RANGE(off, NETXEN_ADDR_OCM0, NETXEN_ADDR_OCM0_MAX)) - return netxen_nic_pci_mem_access_direct(adapter, off, data, 0); + if (ADDR_IN_RANGE(off, NETXEN_ADDR_OCM0, NETXEN_ADDR_OCM0_MAX)) { + return netxen_nic_pci_mem_access_direct(adapter, + off, data, 0); + } return -EIO; diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c index b7f607061865..6695e5473027 100644 --- a/drivers/net/netxen/netxen_nic_main.c +++ b/drivers/net/netxen/netxen_nic_main.c @@ -606,7 +606,7 @@ netxen_setup_pci_map(struct netxen_adapter *adapter) * Set the CRB window to invalid. If any register in window 0 is * accessed it should set the window to 0 and then reset it to 1. */ - adapter->curr_window = 255; + adapter->ahw.crb_win = -1; adapter->ahw.ocm_win = -1; /* remap phys address */ @@ -1437,7 +1437,7 @@ netxen_nic_resume(struct pci_dev *pdev) if (err) return err; - adapter->curr_window = 255; + adapter->ahw.crb_win = -1; adapter->ahw.ocm_win = -1; err = netxen_start_firmware(adapter);