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Date: Sun, 26 Jul 2009 23:07:39 -0700
From: Dhananjay Phadke <dhananjay@...xen.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org
Subject: [PATCH NEXT 04/12] netxen: annotate dma watchdog setup
o remove superfluous code to setup PCI dma watchdog for NX2031.
o disable dma watchdog completely for NX3031 (not required).
Signed-off-by: Dhananjay Phadke <dhananjay@...xen.com>
---
drivers/net/netxen/netxen_nic.h | 73 +--------------------------------
drivers/net/netxen/netxen_nic_hdr.h | 2 +-
drivers/net/netxen/netxen_nic_init.c | 59 ++++++++++++++++-----------
drivers/net/netxen/netxen_nic_main.c | 8 ++--
4 files changed, 43 insertions(+), 99 deletions(-)
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 6b9e759..3368af0 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -1324,24 +1324,6 @@ struct netxen_adapter {
const struct firmware *fw;
};
-/*
- * 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)
-
int netxen_niu_xgbe_enable_phy_interrupts(struct netxen_adapter *adapter);
int netxen_niu_gbe_enable_phy_interrupts(struct netxen_adapter *adapter);
int netxen_niu_xgbe_disable_phy_interrupts(struct netxen_adapter *adapter);
@@ -1402,8 +1384,9 @@ unsigned long netxen_nic_pci_set_window_2M(struct netxen_adapter *adapter,
unsigned long long addr);
/* Functions from netxen_nic_init.c */
-void netxen_free_adapter_offload(struct netxen_adapter *adapter);
-int netxen_initialize_adapter_offload(struct netxen_adapter *adapter);
+int netxen_init_dummy_dma(struct netxen_adapter *adapter);
+void netxen_free_dummy_dma(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_need_fw_reset(struct netxen_adapter *adapter);
@@ -1510,56 +1493,6 @@ 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 */
- ctrl = adapter->hw_read_wx(adapter,
- NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL));
-
- if (netxen_get_dma_watchdog_enabled(ctrl) == 0)
- return 1;
-
- /* Send the disable request */
- netxen_set_dma_watchdog_disable_req(ctrl);
- NXWR32(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;
-
- ctrl = adapter->hw_read_wx(adapter,
- NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL));
-
- return (netxen_get_dma_watchdog_enabled(ctrl) == 0);
-}
-
-static inline int
-dma_watchdog_wakeup(struct netxen_adapter *adapter)
-{
- u32 ctrl;
-
- ctrl = adapter->hw_read_wx(adapter,
- NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL));
-
- if (netxen_get_dma_watchdog_enabled(ctrl))
- return 1;
-
- /* send the wakeup request */
- netxen_set_dma_watchdog_enable_req(ctrl);
-
- NXWR32(adapter, NETXEN_CAM_RAM(NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL), ctrl);
-
- return 0;
-}
-
-
static inline u32 netxen_tx_avail(struct nx_host_tx_ring *tx_ring)
{
smp_mb();
diff --git a/drivers/net/netxen/netxen_nic_hdr.h b/drivers/net/netxen/netxen_nic_hdr.h
index 8241036..a732858 100644
--- a/drivers/net/netxen/netxen_nic_hdr.h
+++ b/drivers/net/netxen/netxen_nic_hdr.h
@@ -852,7 +852,7 @@ enum {
#define NX_PEG_TUNE_MN_PRESENT 0x1
#define NX_PEG_TUNE_CAPABILITY (NETXEN_CAM_RAM(0x02c))
-#define NETXEN_CAM_RAM_DMA_WATCHDOG_CTRL (0x14)
+#define NETXEN_DMA_WATCHDOG_CTRL (NETXEN_CAM_RAM(0x14))
#define NETXEN_PEG_ALIVE_COUNTER (NETXEN_CAM_RAM(0xb0))
#define ISR_MSI_INT_TRIGGER(FUNC) (NETXEN_PCIX_PS_REG(PCIX_MSI_F(FUNC)))
diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c
index 5d7a2c4..9135845 100644
--- a/drivers/net/netxen/netxen_nic_init.c
+++ b/drivers/net/netxen/netxen_nic_init.c
@@ -954,19 +954,20 @@ netxen_release_firmware(struct netxen_adapter *adapter)
release_firmware(adapter->fw);
}
-int netxen_initialize_adapter_offload(struct netxen_adapter *adapter)
+int netxen_init_dummy_dma(struct netxen_adapter *adapter)
{
- uint64_t addr;
- uint32_t hi;
- uint32_t lo;
+ u64 addr;
+ u32 hi, lo;
- adapter->dummy_dma.addr =
- pci_alloc_consistent(adapter->pdev,
+ if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
+ return 0;
+
+ adapter->dummy_dma.addr = pci_alloc_consistent(adapter->pdev,
NETXEN_HOST_DUMMY_DMA_SIZE,
&adapter->dummy_dma.phys_addr);
if (adapter->dummy_dma.addr == NULL) {
- printk("%s: ERROR: Could not allocate dummy DMA memory\n",
- __func__);
+ dev_err(&adapter->pdev->dev,
+ "ERROR: Could not allocate dummy DMA memory\n");
return -ENOMEM;
}
@@ -977,29 +978,41 @@ int netxen_initialize_adapter_offload(struct netxen_adapter *adapter)
NXWR32(adapter, CRB_HOST_DUMMY_BUF_ADDR_HI, hi);
NXWR32(adapter, CRB_HOST_DUMMY_BUF_ADDR_LO, lo);
- if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
- uint32_t temp = 0;
- NXWR32(adapter, CRB_HOST_DUMMY_BUF, temp);
- }
-
return 0;
}
-void netxen_free_adapter_offload(struct netxen_adapter *adapter)
+/*
+ * NetXen DMA watchdog control:
+ *
+ * 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
+ */
+void netxen_free_dummy_dma(struct netxen_adapter *adapter)
{
int i = 100;
+ u32 ctrl;
+
+ if (!NX_IS_REVISION_P2(adapter->ahw.revision_id))
+ return;
if (!adapter->dummy_dma.addr)
return;
- if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
- do {
- if (dma_watchdog_shutdown_request(adapter) == 1)
- break;
+ ctrl = NXRD32(adapter, NETXEN_DMA_WATCHDOG_CTRL);
+ if ((ctrl & 0x1) != 0) {
+ NXWR32(adapter, NETXEN_DMA_WATCHDOG_CTRL, (ctrl | 0x2));
+
+ while ((ctrl & 0x1) != 0) {
+
msleep(50);
- if (dma_watchdog_shutdown_poll_result(adapter) == 1)
+
+ ctrl = NXRD32(adapter, NETXEN_DMA_WATCHDOG_CTRL);
+
+ if (--i == 0)
break;
- } while (--i);
+ };
}
if (i) {
@@ -1008,10 +1021,8 @@ void netxen_free_adapter_offload(struct netxen_adapter *adapter)
adapter->dummy_dma.addr,
adapter->dummy_dma.phys_addr);
adapter->dummy_dma.addr = NULL;
- } else {
- printk(KERN_ERR "%s: dma_watchdog_shutdown failed\n",
- adapter->netdev->name);
- }
+ } else
+ dev_err(&adapter->pdev->dev, "dma_watchdog_shutdown failed\n");
}
int netxen_phantom_init(struct netxen_adapter *adapter, int pegtune_val)
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 76bdd5c..fb976cb 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -745,7 +745,7 @@ netxen_start_firmware(struct netxen_adapter *adapter, int request_fw)
}
- err = netxen_initialize_adapter_offload(adapter);
+ err = netxen_init_dummy_dma(adapter);
if (err)
return err;
@@ -761,7 +761,7 @@ wait_init:
/* Handshake with the card before we register the devices. */
err = netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
if (err) {
- netxen_free_adapter_offload(adapter);
+ netxen_free_dummy_dma(adapter);
return err;
}
@@ -1154,7 +1154,7 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
err_out_disable_msi:
netxen_teardown_intr(adapter);
- netxen_free_adapter_offload(adapter);
+ netxen_free_dummy_dma(adapter);
err_out_iounmap:
netxen_cleanup_pci_map(adapter);
@@ -1189,7 +1189,7 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
}
if (adapter->portnum == 0)
- netxen_free_adapter_offload(adapter);
+ netxen_free_dummy_dma(adapter);
netxen_teardown_intr(adapter);
netxen_free_sds_rings(&adapter->recv_ctx);
--
1.6.0.2
--
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