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igb: move timesync init into a seperate function

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Current code is quite large and making igb_probe difficult to read.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2009-11-12 18:37:00 +00:00 committed by David S. Miller
parent 0e15439ae5
commit 115f459a53
1 changed files with 65 additions and 50 deletions
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115
drivers/net/igb/igb_main.c
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@ -1566,56 +1566,6 @@ static int __devinit igb_probe(struct pci_dev *pdev,
}
#endif
switch (hw->mac.type) {
case e1000_82576:
/*
* Initialize hardware timer: we keep it running just in case
* that some program needs it later on.
*/
memset(&adapter->cycles, 0, sizeof(adapter->cycles));
adapter->cycles.read = igb_read_clock;
adapter->cycles.mask = CLOCKSOURCE_MASK(64);
adapter->cycles.mult = 1;
/**
* Scale the NIC clock cycle by a large factor so that
* relatively small clock corrections can be added or
* substracted at each clock tick. The drawbacks of a large
* factor are a) that the clock register overflows more quickly
* (not such a big deal) and b) that the increment per tick has
* to fit into 24 bits. As a result we need to use a shift of
* 19 so we can fit a value of 16 into the TIMINCA register.
*/
adapter->cycles.shift = IGB_82576_TSYNC_SHIFT;
wr32(E1000_TIMINCA,
(1 << E1000_TIMINCA_16NS_SHIFT) |
(16 << IGB_82576_TSYNC_SHIFT));
/* Set registers so that rollover occurs soon to test this. */
wr32(E1000_SYSTIML, 0x00000000);
wr32(E1000_SYSTIMH, 0xFF800000);
wrfl();
timecounter_init(&adapter->clock,
&adapter->cycles,
ktime_to_ns(ktime_get_real()));
/*
* Synchronize our NIC clock against system wall clock. NIC
* time stamp reading requires ~3us per sample, each sample
* was pretty stable even under load => only require 10
* samples for each offset comparison.
*/
memset(&adapter->compare, 0, sizeof(adapter->compare));
adapter->compare.source = &adapter->clock;
adapter->compare.target = ktime_get_real;
adapter->compare.num_samples = 10;
timecompare_update(&adapter->compare, 0);
break;
case e1000_82575:
/* 82575 does not support timesync */
default:
break;
}
dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n");
/* print bus type/speed/width info */
dev_info(&pdev->dev, "%s: (PCIe:%s:%s) %pM\n",
@ -1781,6 +1731,70 @@ static void __devinit igb_probe_vfs(struct igb_adapter * adapter)
#endif /* CONFIG_PCI_IOV */
}
/**
* igb_init_hw_timer - Initialize hardware timer used with IEEE 1588 timestamp
* @adapter: board private structure to initialize
*
* igb_init_hw_timer initializes the function pointer and values for the hw
* timer found in hardware.
**/
static void igb_init_hw_timer(struct igb_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
switch (hw->mac.type) {
case e1000_82576:
/*
* Initialize hardware timer: we keep it running just in case
* that some program needs it later on.
*/
memset(&adapter->cycles, 0, sizeof(adapter->cycles));
adapter->cycles.read = igb_read_clock;
adapter->cycles.mask = CLOCKSOURCE_MASK(64);
adapter->cycles.mult = 1;
/**
* Scale the NIC clock cycle by a large factor so that
* relatively small clock corrections can be added or
* substracted at each clock tick. The drawbacks of a large
* factor are a) that the clock register overflows more quickly
* (not such a big deal) and b) that the increment per tick has
* to fit into 24 bits. As a result we need to use a shift of
* 19 so we can fit a value of 16 into the TIMINCA register.
*/
adapter->cycles.shift = IGB_82576_TSYNC_SHIFT;
wr32(E1000_TIMINCA,
(1 << E1000_TIMINCA_16NS_SHIFT) |
(16 << IGB_82576_TSYNC_SHIFT));
/* Set registers so that rollover occurs soon to test this. */
wr32(E1000_SYSTIML, 0x00000000);
wr32(E1000_SYSTIMH, 0xFF800000);
wrfl();
timecounter_init(&adapter->clock,
&adapter->cycles,
ktime_to_ns(ktime_get_real()));
/*
* Synchronize our NIC clock against system wall clock. NIC
* time stamp reading requires ~3us per sample, each sample
* was pretty stable even under load => only require 10
* samples for each offset comparison.
*/
memset(&adapter->compare, 0, sizeof(adapter->compare));
adapter->compare.source = &adapter->clock;
adapter->compare.target = ktime_get_real;
adapter->compare.num_samples = 10;
timecompare_update(&adapter->compare, 0);
break;
case e1000_82575:
/* 82575 does not support timesync */
default:
break;
}
}
/**
* igb_sw_init - Initialize general software structures (struct igb_adapter)
* @adapter: board private structure to initialize
@ -1816,6 +1830,7 @@ static int __devinit igb_sw_init(struct igb_adapter *adapter)
return -ENOMEM;
}
igb_init_hw_timer(adapter);
igb_probe_vfs(adapter);
/* Explicitly disable IRQ since the NIC can be in any state. */