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Subject[PATCH] igb: index regs_buff array via index variable
Date
This patch is just a preparation for additional register dump in regs_buff.
To make new register insertion in the middle of regs_buff array easier
change array indexing to use local counter reg_ix.

---

Basically this path is just a subject to ask
How to add a new register to dump from dataseet
Because it is logically better to add an additional register
in the middle of an array but that will break ABI.
To not have the ABI problem we should just add it at the
end of the array and increase the array size.

---

Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com>
---
drivers/net/ethernet/intel/igb/igb_ethtool.c | 110 ++++++++++---------
1 file changed, 57 insertions(+), 53 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index 3182b059bf55..4531f7ea9d99 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -459,6 +459,7 @@ static void igb_get_regs(struct net_device *netdev,
struct e1000_hw *hw = &adapter->hw;
u32 *regs_buff = p;
u8 i;
+ int reg_ix = 0;

memset(p, 0, IGB_REGS_LEN * sizeof(u32));

@@ -603,116 +604,119 @@ static void igb_get_regs(struct net_device *netdev,
regs_buff[119] = adapter->stats.scvpc;
regs_buff[120] = adapter->stats.hrmpc;

+ reg_ix = 121;
for (i = 0; i < 4; i++)
- regs_buff[121 + i] = rd32(E1000_SRRCTL(i));
+ regs_buff[reg_ix++] = rd32(E1000_SRRCTL(i));
for (i = 0; i < 4; i++)
- regs_buff[125 + i] = rd32(E1000_PSRTYPE(i));
+ regs_buff[reg_ix++] = rd32(E1000_PSRTYPE(i));
for (i = 0; i < 4; i++)
- regs_buff[129 + i] = rd32(E1000_RDBAL(i));
+ regs_buff[reg_ix++] = rd32(E1000_RDBAL(i));
for (i = 0; i < 4; i++)
- regs_buff[133 + i] = rd32(E1000_RDBAH(i));
+ regs_buff[reg_ix++] = rd32(E1000_RDBAH(i));
for (i = 0; i < 4; i++)
- regs_buff[137 + i] = rd32(E1000_RDLEN(i));
+ regs_buff[reg_ix++] = rd32(E1000_RDLEN(i));
for (i = 0; i < 4; i++)
- regs_buff[141 + i] = rd32(E1000_RDH(i));
+ regs_buff[reg_ix++] = rd32(E1000_RDH(i));
for (i = 0; i < 4; i++)
- regs_buff[145 + i] = rd32(E1000_RDT(i));
+ regs_buff[reg_ix++] = rd32(E1000_RDT(i));
for (i = 0; i < 4; i++)
- regs_buff[149 + i] = rd32(E1000_RXDCTL(i));
+ regs_buff[reg_ix++] = rd32(E1000_RXDCTL(i));

for (i = 0; i < 10; i++)
- regs_buff[153 + i] = rd32(E1000_EITR(i));
+ regs_buff[reg_ix++] = rd32(E1000_EITR(i));
for (i = 0; i < 8; i++)
- regs_buff[163 + i] = rd32(E1000_IMIR(i));
+ regs_buff[reg_ix++] = rd32(E1000_IMIR(i));
for (i = 0; i < 8; i++)
- regs_buff[171 + i] = rd32(E1000_IMIREXT(i));
+ regs_buff[reg_ix++] = rd32(E1000_IMIREXT(i));
for (i = 0; i < 16; i++)
- regs_buff[179 + i] = rd32(E1000_RAL(i));
+ regs_buff[reg_ix++] = rd32(E1000_RAL(i));
for (i = 0; i < 16; i++)
- regs_buff[195 + i] = rd32(E1000_RAH(i));
+ regs_buff[reg_ix++] = rd32(E1000_RAH(i));

for (i = 0; i < 4; i++)
- regs_buff[211 + i] = rd32(E1000_TDBAL(i));
+ regs_buff[reg_ix++] = rd32(E1000_TDBAL(i));
for (i = 0; i < 4; i++)
- regs_buff[215 + i] = rd32(E1000_TDBAH(i));
+ regs_buff[reg_ix++] = rd32(E1000_TDBAH(i));
for (i = 0; i < 4; i++)
- regs_buff[219 + i] = rd32(E1000_TDLEN(i));
+ regs_buff[reg_ix++] = rd32(E1000_TDLEN(i));
for (i = 0; i < 4; i++)
- regs_buff[223 + i] = rd32(E1000_TDH(i));
+ regs_buff[reg_ix++] = rd32(E1000_TDH(i));
for (i = 0; i < 4; i++)
- regs_buff[227 + i] = rd32(E1000_TDT(i));
+ regs_buff[reg_ix++] = rd32(E1000_TDT(i));
for (i = 0; i < 4; i++)
- regs_buff[231 + i] = rd32(E1000_TXDCTL(i));
+ regs_buff[reg_ix++] = rd32(E1000_TXDCTL(i));
for (i = 0; i < 4; i++)
- regs_buff[235 + i] = rd32(E1000_TDWBAL(i));
+ regs_buff[reg_ix++] = rd32(E1000_TDWBAL(i));
for (i = 0; i < 4; i++)
- regs_buff[239 + i] = rd32(E1000_TDWBAH(i));
+ regs_buff[reg_ix++] = rd32(E1000_TDWBAH(i));
for (i = 0; i < 4; i++)
- regs_buff[243 + i] = rd32(E1000_DCA_TXCTRL(i));
+ regs_buff[reg_ix++] = rd32(E1000_DCA_TXCTRL(i));

for (i = 0; i < 4; i++)
- regs_buff[247 + i] = rd32(E1000_IP4AT_REG(i));
+ regs_buff[reg_ix++] = rd32(E1000_IP4AT_REG(i));
for (i = 0; i < 4; i++)
- regs_buff[251 + i] = rd32(E1000_IP6AT_REG(i));
+ regs_buff[reg_ix++] = rd32(E1000_IP6AT_REG(i));
for (i = 0; i < 32; i++)
- regs_buff[255 + i] = rd32(E1000_WUPM_REG(i));
+ regs_buff[reg_ix++] = rd32(E1000_WUPM_REG(i));
for (i = 0; i < 128; i++)
- regs_buff[287 + i] = rd32(E1000_FFMT_REG(i));
+ regs_buff[reg_ix++] = rd32(E1000_FFMT_REG(i));
for (i = 0; i < 128; i++)
- regs_buff[415 + i] = rd32(E1000_FFVT_REG(i));
+ regs_buff[reg_ix++] = rd32(E1000_FFVT_REG(i));
for (i = 0; i < 4; i++)
- regs_buff[543 + i] = rd32(E1000_FFLT_REG(i));
+ regs_buff[reg_ix++] = rd32(E1000_FFLT_REG(i));

- regs_buff[547] = rd32(E1000_TDFH);
- regs_buff[548] = rd32(E1000_TDFT);
- regs_buff[549] = rd32(E1000_TDFHS);
- regs_buff[550] = rd32(E1000_TDFPC);
+ regs_buff[reg_ix++] = rd32(E1000_TDFH);
+ regs_buff[reg_ix++] = rd32(E1000_TDFT);
+ regs_buff[reg_ix++] = rd32(E1000_TDFHS);
+ regs_buff[reg_ix++] = rd32(E1000_TDFPC);

if (hw->mac.type > e1000_82580) {
- regs_buff[551] = adapter->stats.o2bgptc;
- regs_buff[552] = adapter->stats.b2ospc;
- regs_buff[553] = adapter->stats.o2bspc;
- regs_buff[554] = adapter->stats.b2ogprc;
+ regs_buff[reg_ix++] = adapter->stats.o2bgptc;
+ regs_buff[reg_ix++] = adapter->stats.b2ospc;
+ regs_buff[reg_ix++] = adapter->stats.o2bspc;
+ regs_buff[reg_ix++] = adapter->stats.b2ogprc;
}

+ reg_ix = 555;
if (hw->mac.type == e1000_82576) {
for (i = 0; i < 12; i++)
- regs_buff[555 + i] = rd32(E1000_SRRCTL(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_SRRCTL(i + 4));
for (i = 0; i < 4; i++)
- regs_buff[567 + i] = rd32(E1000_PSRTYPE(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_PSRTYPE(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[571 + i] = rd32(E1000_RDBAL(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_RDBAL(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[583 + i] = rd32(E1000_RDBAH(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_RDBAH(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[595 + i] = rd32(E1000_RDLEN(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_RDLEN(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[607 + i] = rd32(E1000_RDH(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_RDH(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[619 + i] = rd32(E1000_RDT(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_RDT(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[631 + i] = rd32(E1000_RXDCTL(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_RXDCTL(i + 4));

for (i = 0; i < 12; i++)
- regs_buff[643 + i] = rd32(E1000_TDBAL(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_TDBAL(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[655 + i] = rd32(E1000_TDBAH(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_TDBAH(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[667 + i] = rd32(E1000_TDLEN(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_TDLEN(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[679 + i] = rd32(E1000_TDH(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_TDH(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[691 + i] = rd32(E1000_TDT(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_TDT(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[703 + i] = rd32(E1000_TXDCTL(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_TXDCTL(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[715 + i] = rd32(E1000_TDWBAL(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_TDWBAL(i + 4));
for (i = 0; i < 12; i++)
- regs_buff[727 + i] = rd32(E1000_TDWBAH(i + 4));
+ regs_buff[reg_ix++] = rd32(E1000_TDWBAH(i + 4));
}

+ reg_ix = 739;
if (hw->mac.type == e1000_i210 || hw->mac.type == e1000_i211)
- regs_buff[739] = rd32(E1000_I210_RR2DCDELAY);
+ regs_buff[reg_ix] = rd32(E1000_I210_RR2DCDELAY);
}

static int igb_get_eeprom_len(struct net_device *netdev)
--
2.17.1
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