diff mbox series

intel: Simplify DMA setting

Message ID c7a34d0096eb4ba98dd9ce5b64ba079126cab708.1641255235.git.christophe.jaillet@wanadoo.fr (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series intel: Simplify DMA setting | expand

Checks

Context Check Description
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Single patches do not need cover letters
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1 this patch: 1
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 197 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/tree_selection success Guessing tree name failed - patch did not apply

Commit Message

Christophe JAILLET Jan. 4, 2022, 12:15 a.m. UTC 
As stated in [1], dma_set_mask() with a 64-bit mask will never fail if
dev->dma_mask is non-NULL.
So, if it fails, the 32 bits case will also fail for the same reason.

Simplify code and remove some dead code accordingly.

[1]: https://lkml.org/lkml/2021/6/7/398

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/net/ethernet/intel/e1000e/netdev.c    | 22 ++++++-------------
 drivers/net/ethernet/intel/i40e/i40e_main.c   |  9 +++-----
 drivers/net/ethernet/intel/iavf/iavf_main.c   |  9 +++-----
 drivers/net/ethernet/intel/ice/ice_main.c     |  2 --
 drivers/net/ethernet/intel/ixgb/ixgb_main.c   | 19 +++++-----------
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 20 ++++++-----------
 .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 20 +++++------------
 7 files changed, 31 insertions(+), 70 deletions(-)

Comments

Christoph Hellwig Jan. 4, 2022, 7:53 a.m. UTC | #1 
Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>

Although normally I'd expect one patch per driver.
Alexander Lobakin Jan. 4, 2022, 1:29 p.m. UTC | #2 
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Tue, 4 Jan 2022 01:15:20 +0100

> As stated in [1], dma_set_mask() with a 64-bit mask will never fail if
> dev->dma_mask is non-NULL.
> So, if it fails, the 32 bits case will also fail for the same reason.
> 
> Simplify code and remove some dead code accordingly.
> 
> [1]: https://lkml.org/lkml/2021/6/7/398
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
>  drivers/net/ethernet/intel/e1000e/netdev.c    | 22 ++++++-------------
>  drivers/net/ethernet/intel/i40e/i40e_main.c   |  9 +++-----
>  drivers/net/ethernet/intel/iavf/iavf_main.c   |  9 +++-----
>  drivers/net/ethernet/intel/ice/ice_main.c     |  2 --
>  drivers/net/ethernet/intel/ixgb/ixgb_main.c   | 19 +++++-----------
>  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 20 ++++++-----------
>  .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 20 +++++------------
>  7 files changed, 31 insertions(+), 70 deletions(-)

I like it, thanks!

Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>

Tony might ask to split it into per-driver patches tho, will see.

--- 8< ---

Al
Tony Nguyen Jan. 4, 2022, 9:56 p.m. UTC | #3 
On Tue, 2022-01-04 at 14:29 +0100, Alexander Lobakin wrote:
> From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> Date: Tue, 4 Jan 2022 01:15:20 +0100
> 
> > As stated in [1], dma_set_mask() with a 64-bit mask will never fail
> > if
> > dev->dma_mask is non-NULL.
> > So, if it fails, the 32 bits case will also fail for the same
> > reason.
> > 
> > Simplify code and remove some dead code accordingly.
> > 
> > [1]: https://lkml.org/lkml/2021/6/7/398
> > 
> > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> > ---
> >  drivers/net/ethernet/intel/e1000e/netdev.c    | 22 ++++++---------
> > ----
> >  drivers/net/ethernet/intel/i40e/i40e_main.c   |  9 +++-----
> >  drivers/net/ethernet/intel/iavf/iavf_main.c   |  9 +++-----
> >  drivers/net/ethernet/intel/ice/ice_main.c     |  2 --
> >  drivers/net/ethernet/intel/ixgb/ixgb_main.c   | 19 +++++----------
> > -
> >  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 20 ++++++---------
> > --
> >  .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 20 +++++----------
> > --
> >  7 files changed, 31 insertions(+), 70 deletions(-)
> 
> I like it, thanks!
> 
> Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
> 
> Tony might ask to split it into per-driver patches tho, will see.

Hi Christophe,

As mentioned by others, would mind breaking these per-driver?

Thanks,
Tony

> 
> --- 8< ---
> 
> Al
Christophe JAILLET Jan. 5, 2022, 6:31 a.m. UTC | #4 
Le 04/01/2022 à 22:56, Nguyen, Anthony L a écrit :
> On Tue, 2022-01-04 at 14:29 +0100, Alexander Lobakin wrote:
>> From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
>> Date: Tue, 4 Jan 2022 01:15:20 +0100
>>
>> Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
>>
>> Tony might ask to split it into per-driver patches tho, will see.
> 
> Hi Christophe,
> 
> As mentioned by others, would mind breaking these per-driver?
> 
> Thanks,
> Tony
> 

I'll do, but to much bureaucracy will kill us all.

CJ

>>
>> --- 8< ---
>>
>> Al
>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 635a95927e93..4f6ee5c44f75 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -7385,9 +7385,9 @@  static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	resource_size_t flash_start, flash_len;
 	static int cards_found;
 	u16 aspm_disable_flag = 0;
-	int bars, i, err, pci_using_dac;
 	u16 eeprom_data = 0;
 	u16 eeprom_apme_mask = E1000_EEPROM_APME;
+	int bars, i, err;
 	s32 ret_val = 0;
 
 	if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
@@ -7401,17 +7401,11 @@  static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		return err;
 
-	pci_using_dac = 0;
 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
-	if (!err) {
-		pci_using_dac = 1;
-	} else {
-		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-		if (err) {
-			dev_err(&pdev->dev,
-				"No usable DMA configuration, aborting\n");
-			goto err_dma;
-		}
+	if (err) {
+		dev_err(&pdev->dev,
+			"No usable DMA configuration, aborting\n");
+		goto err_dma;
 	}
 
 	bars = pci_select_bars(pdev, IORESOURCE_MEM);
@@ -7547,10 +7541,8 @@  static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	netdev->priv_flags |= IFF_UNICAST_FLT;
 
-	if (pci_using_dac) {
-		netdev->features |= NETIF_F_HIGHDMA;
-		netdev->vlan_features |= NETIF_F_HIGHDMA;
-	}
+	netdev->features |= NETIF_F_HIGHDMA;
+	netdev->vlan_features |= NETIF_F_HIGHDMA;
 
 	/* MTU range: 68 - max_hw_frame_size */
 	netdev->min_mtu = ETH_MIN_MTU;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index ef3375e84821..ccd7e33aa80d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -15282,12 +15282,9 @@  static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* set up for high or low dma */
 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 	if (err) {
-		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-		if (err) {
-			dev_err(&pdev->dev,
-				"DMA configuration failed: 0x%x\n", err);
-			goto err_dma;
-		}
+		dev_err(&pdev->dev,
+			"DMA configuration failed: 0x%x\n", err);
+		goto err_dma;
 	}
 
 	/* set up pci connections */
diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index 504fea4e90fb..16c73ad1b0d3 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -4365,12 +4365,9 @@  static int iavf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 	if (err) {
-		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-		if (err) {
-			dev_err(&pdev->dev,
-				"DMA configuration failed: 0x%x\n", err);
-			goto err_dma;
-		}
+		dev_err(&pdev->dev,
+			"DMA configuration failed: 0x%x\n", err);
+		goto err_dma;
 	}
 
 	err = pci_request_regions(pdev, iavf_driver_name);
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 476533f63e09..4016031e1ba1 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4435,8 +4435,6 @@  ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent)
 
 	/* set up for high or low DMA */
 	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
-	if (err)
-		err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
 	if (err) {
 		dev_err(dev, "DMA configuration failed: 0x%x\n", err);
 		return err;
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_main.c b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
index 99d481904ce6..affdefcca7e3 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb_main.c
+++ b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
@@ -361,7 +361,6 @@  ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct net_device *netdev = NULL;
 	struct ixgb_adapter *adapter;
 	static int cards_found = 0;
-	int pci_using_dac;
 	u8 addr[ETH_ALEN];
 	int i;
 	int err;
@@ -370,16 +369,10 @@  ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		return err;
 
-	pci_using_dac = 0;
 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
-	if (!err) {
-		pci_using_dac = 1;
-	} else {
-		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-		if (err) {
-			pr_err("No usable DMA configuration, aborting\n");
-			goto err_dma_mask;
-		}
+	if (err) {
+		pr_err("No usable DMA configuration, aborting\n");
+		goto err_dma_mask;
 	}
 
 	err = pci_request_regions(pdev, ixgb_driver_name);
@@ -444,10 +437,8 @@  ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 			   NETIF_F_HW_VLAN_CTAG_FILTER;
 	netdev->hw_features |= NETIF_F_RXCSUM;
 
-	if (pci_using_dac) {
-		netdev->features |= NETIF_F_HIGHDMA;
-		netdev->vlan_features |= NETIF_F_HIGHDMA;
-	}
+	netdev->features |= NETIF_F_HIGHDMA;
+	netdev->vlan_features |= NETIF_F_HIGHDMA;
 
 	/* MTU range: 68 - 16114 */
 	netdev->min_mtu = ETH_MIN_MTU;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index abb118f0ae69..2bfeeaac5ef8 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -10632,9 +10632,9 @@  static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct ixgbe_adapter *adapter = NULL;
 	struct ixgbe_hw *hw;
 	const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
-	int i, err, pci_using_dac, expected_gts;
 	unsigned int indices = MAX_TX_QUEUES;
 	u8 part_str[IXGBE_PBANUM_LENGTH];
+	int i, err, expected_gts;
 	bool disable_dev = false;
 #ifdef IXGBE_FCOE
 	u16 device_caps;
@@ -10654,16 +10654,11 @@  static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		return err;
 
-	if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
-		pci_using_dac = 1;
-	} else {
-		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-		if (err) {
-			dev_err(&pdev->dev,
-				"No usable DMA configuration, aborting\n");
-			goto err_dma;
-		}
-		pci_using_dac = 0;
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (err) {
+		dev_err(&pdev->dev,
+			"No usable DMA configuration, aborting\n");
+		goto err_dma;
 	}
 
 	err = pci_request_mem_regions(pdev, ixgbe_driver_name);
@@ -10861,8 +10856,7 @@  static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		netdev->hw_features |= NETIF_F_NTUPLE |
 				       NETIF_F_HW_TC;
 
-	if (pci_using_dac)
-		netdev->features |= NETIF_F_HIGHDMA;
+	netdev->features |= NETIF_F_HIGHDMA;
 
 	netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
 	netdev->hw_enc_features |= netdev->vlan_features;
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 2459ecf65125..a54c23079da6 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -4511,22 +4511,17 @@  static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct ixgbevf_adapter *adapter = NULL;
 	struct ixgbe_hw *hw = NULL;
 	const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
-	int err, pci_using_dac;
 	bool disable_dev = false;
+	int err;
 
 	err = pci_enable_device(pdev);
 	if (err)
 		return err;
 
-	if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
-		pci_using_dac = 1;
-	} else {
-		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
-		if (err) {
-			dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
-			goto err_dma;
-		}
-		pci_using_dac = 0;
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (err) {
+		dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
+		goto err_dma;
 	}
 
 	err = pci_request_regions(pdev, ixgbevf_driver_name);
@@ -4606,10 +4601,7 @@  static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	netdev->hw_features |= NETIF_F_GSO_PARTIAL |
 			       IXGBEVF_GSO_PARTIAL_FEATURES;
 
-	netdev->features = netdev->hw_features;
-
-	if (pci_using_dac)
-		netdev->features |= NETIF_F_HIGHDMA;
+	netdev->features = netdev->hw_features | NETIF_F_HIGHDMA;
 
 	netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
 	netdev->mpls_features |= NETIF_F_SG |