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i40evf: create a generic get RSS function 

There are two ways to get RSS, this patch implements two functions
with the same input parameters, and creates a more generic function
for getting RSS configuration.

Change-ID: I12d3b712c21455d47dd0a5aae58fc9b7c680db59
Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
hifive-unleashed-5.1
Helin Zhang 2015-10-26 19:44:33 -04:00 committed by Jeff Kirsher
parent 2c86ac3c70
commit 90b02b4392
3 changed files with 121 additions and 13 deletions
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2
drivers/net/ethernet/intel/i40evf/i40evf.h
View File

@ -316,4 +316,6 @@ void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
i40e_status v_retval, u8 *msg, u16 msglen);
int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut,
u16 lut_size);
int i40evf_get_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut,
u16 lut_size);
#endif /* _I40EVF_H_ */

35
drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
View File

@ -634,25 +634,34 @@ static int i40evf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
u8 *hfunc)
{
struct i40evf_adapter *adapter = netdev_priv(netdev);
struct i40e_hw *hw = &adapter->hw;
u32 hlut_val;
int i, j;
struct i40e_vsi *vsi = &adapter->vsi;
u8 *seed = NULL, *lut;
int ret;
u16 i;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP;
if (!indir)
return 0;
if (indir) {
for (i = 0, j = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
hlut_val = rd32(hw, I40E_VFQF_HLUT(i));
indir[j++] = hlut_val & 0xff;
indir[j++] = (hlut_val >> 8) & 0xff;
indir[j++] = (hlut_val >> 16) & 0xff;
indir[j++] = (hlut_val >> 24) & 0xff;
}
}
return 0;
seed = key;
lut = kzalloc(I40EVF_HLUT_ARRAY_SIZE, GFP_KERNEL);
if (!lut)
return -ENOMEM;
ret = i40evf_get_rss(vsi, seed, lut, I40EVF_HLUT_ARRAY_SIZE);
if (ret)
goto out;
/* Each 32 bits pointed by 'indir' is stored with a lut entry */
for (i = 0; i < I40EVF_HLUT_ARRAY_SIZE; i++)
indir[i] = (u32)lut[i];
out:
kfree(lut);
return ret;
}
/**

97
drivers/net/ethernet/intel/i40evf/i40evf_main.c
View File

@ -1299,6 +1299,84 @@ static int i40evf_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
return 0;
}
/**
* * i40evf_get_rss_aq - Get RSS keys and lut by using AQ commands
* @vsi: Pointer to vsi structure
* @seed: RSS hash seed
* @lut: Lookup table
* @lut_size: Lookup table size
*
* Return 0 on success, negative on failure
**/
static int i40evf_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
u8 *lut, u16 lut_size)
{
struct i40evf_adapter *adapter = vsi->back;
struct i40e_hw *hw = &adapter->hw;
int ret = 0;
if (seed) {
ret = i40evf_aq_get_rss_key(hw, vsi->id,
(struct i40e_aqc_get_set_rss_key_data *)seed);
if (ret) {
dev_err(&adapter->pdev->dev,
"Cannot get RSS key, err %s aq_err %s\n",
i40evf_stat_str(hw, ret),
i40evf_aq_str(hw, hw->aq.asq_last_status));
return ret;
}
}
if (lut) {
ret = i40evf_aq_get_rss_lut(hw, vsi->id, seed, lut, lut_size);
if (ret) {
dev_err(&adapter->pdev->dev,
"Cannot get RSS lut, err %s aq_err %s\n",
i40evf_stat_str(hw, ret),
i40evf_aq_str(hw, hw->aq.asq_last_status));
return ret;
}
}
return ret;
}
/**
* * i40evf_get_rss_reg - Get RSS keys and lut by reading registers
* @vsi: Pointer to vsi structure
* @seed: RSS hash seed
* @lut: Lookup table
* @lut_size: Lookup table size
*
* Returns 0 on success, negative on failure
**/
static int i40evf_get_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
const u8 *lut, u16 lut_size)
{
struct i40evf_adapter *adapter = vsi->back;
struct i40e_hw *hw = &adapter->hw;
u16 i;
if (seed) {
u32 *seed_dw = (u32 *)seed;
for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
seed_dw[i] = rd32(hw, I40E_VFQF_HKEY(i));
}
if (lut) {
u32 *lut_dw = (u32 *)lut;
if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
return -EINVAL;
for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
lut_dw[i] = rd32(hw, I40E_VFQF_HLUT(i));
}
return 0;
}
/**
* i40evf_config_rss - Configure RSS keys and lut
* @vsi: Pointer to vsi structure
@ -1319,6 +1397,25 @@ int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed,
return i40evf_config_rss_reg(vsi, seed, lut, lut_size);
}
/**
* i40evf_get_rss - Get RSS keys and lut
* @vsi: Pointer to vsi structure
* @seed: RSS hash seed
* @lut: Lookup table
* @lut_size: Lookup table size
*
* Returns 0 on success, negative on failure
**/
int i40evf_get_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut, u16 lut_size)
{
struct i40evf_adapter *adapter = vsi->back;
if (RSS_AQ(adapter))
return i40evf_get_rss_aq(vsi, seed, lut, lut_size);
else
return i40evf_get_rss_reg(vsi, seed, lut, lut_size);
}
/**
* i40evf_fill_rss_lut - Fill the lut with default values
* @lut: Lookup table to be filled with