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Date: Tue, 24 Nov 2015 16:04:45 -0800
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Helin Zhang <helin.zhang@...el.com>, netdev@...r.kernel.org,
nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 15/16] i40e: create a generic configure rss function
From: Helin Zhang <helin.zhang@...el.com>
This patch renames the old pf-specific function in order to clarify
its scope. This patch also creates a more generic configure RSS
function with the old name.
This patch also creates a new more generic function to get RSS
configuration, using the appropriate method.
Change-ID: Ieddca2707b708ef19f1ebccdfd03a0a0cd63d3af
Signed-off-by: Helin Zhang <helin.zhang@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/i40e/i40e.h | 2 +
drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 72 ++++++++++------------
drivers/net/ethernet/intel/i40e/i40e_main.c | 85 ++++++++++++++++++++++----
3 files changed, 107 insertions(+), 52 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index f6b747c..89f5323 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -670,6 +670,8 @@ extern const char i40e_driver_name[];
extern const char i40e_driver_version_str[];
void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags);
void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags);
+int i40e_config_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size);
+int i40e_get_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size);
struct i40e_vsi *i40e_find_vsi_from_id(struct i40e_pf *pf, u16 id);
void i40e_update_stats(struct i40e_vsi *vsi);
void i40e_update_eth_stats(struct i40e_vsi *vsi);
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index f26c0d1..6cb2b34 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -2611,10 +2611,9 @@ static int i40e_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
{
struct i40e_netdev_priv *np = netdev_priv(netdev);
struct i40e_vsi *vsi = np->vsi;
- struct i40e_pf *pf = vsi->back;
- struct i40e_hw *hw = &pf->hw;
- u32 reg_val;
- int i, j;
+ u8 *lut, *seed = NULL;
+ int ret;
+ u16 i;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP;
@@ -2622,24 +2621,20 @@ static int i40e_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
if (!indir)
return 0;
- for (i = 0, j = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++) {
- reg_val = rd32(hw, I40E_PFQF_HLUT(i));
- indir[j++] = reg_val & 0xff;
- indir[j++] = (reg_val >> 8) & 0xff;
- indir[j++] = (reg_val >> 16) & 0xff;
- indir[j++] = (reg_val >> 24) & 0xff;
- }
+ seed = key;
+ lut = kzalloc(I40E_HLUT_ARRAY_SIZE, GFP_KERNEL);
+ if (!lut)
+ return -ENOMEM;
+ ret = i40e_get_rss(vsi, seed, lut, I40E_HLUT_ARRAY_SIZE);
+ if (ret)
+ goto out;
+ for (i = 0; i < I40E_HLUT_ARRAY_SIZE; i++)
+ indir[i] = (u32)(lut[i]);
- if (key) {
- for (i = 0, j = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++) {
- reg_val = rd32(hw, I40E_PFQF_HKEY(i));
- key[j++] = (u8)(reg_val & 0xff);
- key[j++] = (u8)((reg_val >> 8) & 0xff);
- key[j++] = (u8)((reg_val >> 16) & 0xff);
- key[j++] = (u8)((reg_val >> 24) & 0xff);
- }
- }
- return 0;
+out:
+ kfree(lut);
+
+ return ret;
}
/**
@@ -2656,10 +2651,10 @@ static int i40e_set_rxfh(struct net_device *netdev, const u32 *indir,
{
struct i40e_netdev_priv *np = netdev_priv(netdev);
struct i40e_vsi *vsi = np->vsi;
- struct i40e_pf *pf = vsi->back;
- struct i40e_hw *hw = &pf->hw;
- u32 reg_val;
- int i, j;
+ u8 seed_def[I40E_HKEY_ARRAY_SIZE];
+ u8 *lut, *seed = NULL;
+ u16 i;
+ int ret;
if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
@@ -2667,24 +2662,19 @@ static int i40e_set_rxfh(struct net_device *netdev, const u32 *indir,
if (!indir)
return 0;
- for (i = 0, j = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++) {
- reg_val = indir[j++];
- reg_val |= indir[j++] << 8;
- reg_val |= indir[j++] << 16;
- reg_val |= indir[j++] << 24;
- wr32(hw, I40E_PFQF_HLUT(i), reg_val);
- }
-
if (key) {
- for (i = 0, j = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++) {
- reg_val = key[j++];
- reg_val |= key[j++] << 8;
- reg_val |= key[j++] << 16;
- reg_val |= key[j++] << 24;
- wr32(hw, I40E_PFQF_HKEY(i), reg_val);
- }
+ memcpy(seed_def, key, I40E_HKEY_ARRAY_SIZE);
+ seed = seed_def;
}
- return 0;
+ lut = kzalloc(I40E_HLUT_ARRAY_SIZE, GFP_KERNEL);
+ if (!lut)
+ return -ENOMEM;
+ for (i = 0; i < I40E_HLUT_ARRAY_SIZE; i++)
+ lut[i] = (u8)(indir[i]);
+ ret = i40e_config_rss(vsi, seed, lut, I40E_HLUT_ARRAY_SIZE);
+ kfree(lut);
+
+ return ret;
}
/**
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 9fe6802..84b1962 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -7873,7 +7873,7 @@ static int i40e_vsi_config_rss(struct i40e_vsi *vsi)
}
/**
- * i40e_config_rss_reg - Prepare for RSS if used
+ * i40e_config_rss_reg - Configure RSS keys and lut by writing registers
* @vsi: Pointer to vsi structure
* @seed: RSS hash seed
* @lut: Lookup table
@@ -7911,6 +7911,73 @@ static int i40e_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
}
/**
+ * i40e_get_rss_reg - Get the RSS keys and lut by reading registers
+ * @vsi: Pointer to VSI structure
+ * @seed: Buffer to store the keys
+ * @lut: Buffer to store the lookup table entries
+ * @lut_size: Size of buffer to store the lookup table entries
+ *
+ * Returns 0 on success, negative on failure
+ */
+static int i40e_get_rss_reg(struct i40e_vsi *vsi, u8 *seed,
+ u8 *lut, u16 lut_size)
+{
+ struct i40e_pf *pf = vsi->back;
+ struct i40e_hw *hw = &pf->hw;
+ u16 i;
+
+ if (seed) {
+ u32 *seed_dw = (u32 *)seed;
+
+ for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
+ seed_dw[i] = rd32(hw, I40E_PFQF_HKEY(i));
+ }
+ if (lut) {
+ u32 *lut_dw = (u32 *)lut;
+
+ if (lut_size != I40E_HLUT_ARRAY_SIZE)
+ return -EINVAL;
+ for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
+ lut_dw[i] = rd32(hw, I40E_PFQF_HLUT(i));
+ }
+
+ return 0;
+}
+
+/**
+ * i40e_config_rss - Configure 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 i40e_config_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
+{
+ struct i40e_pf *pf = vsi->back;
+
+ if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE)
+ return i40e_config_rss_aq(vsi, seed, lut, lut_size);
+ else
+ return i40e_config_rss_reg(vsi, seed, lut, lut_size);
+}
+
+/**
+ * i40e_get_rss - Get RSS keys and lut
+ * @vsi: Pointer to VSI structure
+ * @seed: Buffer to store the keys
+ * @lut: Buffer to store the lookup table entries
+ * lut_size: Size of buffer to store the lookup table entries
+ *
+ * Returns 0 on success, negative on failure
+ */
+int i40e_get_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
+{
+ return i40e_get_rss_reg(vsi, seed, lut, lut_size);
+}
+
+/**
* i40e_fill_rss_lut - Fill the RSS lookup table with default values
* @pf: Pointer to board private structure
* @lut: Lookup table
@@ -7927,10 +7994,10 @@ static void i40e_fill_rss_lut(struct i40e_pf *pf, u8 *lut,
}
/**
- * i40e_config_rss - Prepare for RSS if used
+ * i40e_pf_config_rss - Prepare for RSS if used
* @pf: board private structure
**/
-static int i40e_config_rss(struct i40e_pf *pf)
+static int i40e_pf_config_rss(struct i40e_pf *pf)
{
struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
u8 seed[I40E_HKEY_ARRAY_SIZE];
@@ -7940,8 +8007,6 @@ static int i40e_config_rss(struct i40e_pf *pf)
u64 hena;
int ret;
- netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
-
/* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
hena = (u64)rd32(hw, I40E_PFQF_HENA(0)) |
((u64)rd32(hw, I40E_PFQF_HENA(1)) << 32);
@@ -7965,10 +8030,8 @@ static int i40e_config_rss(struct i40e_pf *pf)
i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
- if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE)
- ret = i40e_config_rss_aq(vsi, seed, lut, vsi->rss_table_size);
- else
- ret = i40e_config_rss_reg(vsi, seed, lut, vsi->rss_table_size);
+ netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
+ ret = i40e_config_rss(vsi, seed, lut, vsi->rss_table_size);
kfree(lut);
@@ -8000,7 +8063,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
pf->rss_size = new_rss_size;
i40e_reset_and_rebuild(pf, true);
- i40e_config_rss(pf);
+ i40e_pf_config_rss(pf);
}
dev_info(&pf->pdev->dev, "RSS count: %d\n", pf->rss_size);
return pf->rss_size;
@@ -10009,7 +10072,7 @@ static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
* the hash
*/
if ((pf->flags & I40E_FLAG_RSS_ENABLED))
- i40e_config_rss(pf);
+ i40e_pf_config_rss(pf);
/* fill in link information and enable LSE reporting */
i40e_update_link_info(&pf->hw);
--
2.5.0
--
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