export pcie_flr and remove copies of it in drivers V2

export pcie_flr and remove copies of it in drivers V2

[Christoph Hellwig]

Hi all,

this exports the PCI layer pcie_flr helper, and removes various opencoded
copies of it.

Changes since V1:
 - rebase on top of the pci/virtualization branch
 - fixed the probe case in __pci_dev_reset
 - added ACKs from Bjorn
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

export pcie_flr and remove copies of it in drivers V2

[Christoph Hellwig]

Hi all,

this exports the PCI layer pcie_flr helper, and removes various opencoded
copies of it.

Changes since V1:
 - rebase on top of the pci/virtualization branch
 - fixed the probe case in __pci_dev_reset
 - added ACKs from Bjorn

[PATCH 1/7] PCI: export pcie_flr

[Christoph Hellwig]

Currently we opencode the FLR sequence in lots of place, export a core
helper instead.  We split out the probing for FLR support as all the
non-core callers already know their hardware.

Note that in the new pci_has_flr function the quirk check has been moved
before the capability check as there is no point in reading the
capability in this case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pci.c   | 39 ++++++++++++++++++++++++++++-----------
 include/linux/pci.h |  1 +
 2 files changed, 29 insertions(+), 11 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index bef14777bb30..957a11a6a840 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3773,27 +3773,41 @@ static void pci_flr_wait(struct pci_dev *dev)
 			 (i - 1) * 100);
 }
 
-static int pcie_flr(struct pci_dev *dev, int probe)
+/**
+ * pcie_has_flr - check if a device supports function level resets
+ * @dev:	device to check
+ *
+ * Returns true if the device advertises support for PCIe function level
+ * resets.
+ */
+static bool pcie_has_flr(struct pci_dev *dev)
 {
 	u32 cap;
 
-	pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap);
-	if (!(cap & PCI_EXP_DEVCAP_FLR))
-		return -ENOTTY;
-
 	if (dev->dev_flags & PCI_DEV_FLAGS_NO_FLR_RESET)
-		return -ENOTTY;
+		return false;
 
-	if (probe)
-		return 0;
+	pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap);
+	return cap & PCI_EXP_DEVCAP_FLR;
+}
 
+/**
+ * pcie_flr - initiate a PCIe function level reset
+ * @dev:	device to reset
+ *
+ * Initiate a function level reset on @dev.  The caller should ensure the
+ * device supports FLR before calling this function, e.g. by using the
+ * pcie_has_flr() helper.
+ */
+void pcie_flr(struct pci_dev *dev)
+{
 	if (!pci_wait_for_pending_transaction(dev))
 		dev_err(&dev->dev, "timed out waiting for pending transaction; performing function level reset anyway\n");
 
 	pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
 	pci_flr_wait(dev);
-	return 0;
 }
+EXPORT_SYMBOL_GPL(pcie_flr);
 
 static int pci_af_flr(struct pci_dev *dev, int probe)
 {
@@ -3977,9 +3991,12 @@ static int __pci_dev_reset(struct pci_dev *dev, int probe)
 	if (rc != -ENOTTY)
 		goto done;
 
-	rc = pcie_flr(dev, probe);
-	if (rc != -ENOTTY)
+	if (pcie_has_flr(dev)) {
+		if (!probe)
+			pcie_flr(dev);
+		rc = 0;
 		goto done;
+	}
 
 	rc = pci_af_flr(dev, probe);
 	if (rc != -ENOTTY)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 20e1865233a4..60162f51227a 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1054,6 +1054,7 @@ int pcie_get_mps(struct pci_dev *dev);
 int pcie_set_mps(struct pci_dev *dev, int mps);
 int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed,
 			  enum pcie_link_width *width);
+void pcie_flr(struct pci_dev *dev);
 int __pci_reset_function(struct pci_dev *dev);
 int __pci_reset_function_locked(struct pci_dev *dev);
 int pci_reset_function(struct pci_dev *dev);
-- 
2.11.0

[PATCH 2/7] PCI: call pcie_flr from reset_intel_82599_sfp_virtfn

[Christoph Hellwig]

The 82599 quirk contained an outdated copy of the FLR code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/quirks.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 823271b13d12..8195ca294ee5 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3641,19 +3641,11 @@ static int reset_intel_82599_sfp_virtfn(struct pci_dev *dev, int probe)
 	 *
 	 * The 82599 supports FLR on VFs, but FLR support is reported only
 	 * in the PF DEVCAP (sec 9.3.10.4), not in the VF DEVCAP (sec 9.5).
-	 * Therefore, we can't use pcie_flr(), which checks the VF DEVCAP.
+	 * Thus we must call pcie_flr directly without first checking if it is
+	 * supported.
 	 */
-
-	if (probe)
-		return 0;
-
-	if (!pci_wait_for_pending_transaction(dev))
-		dev_err(&dev->dev, "transaction is not cleared; proceeding with reset anyway\n");
-
-	pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
-
-	msleep(100);
-
+	if (!probe)
+		pcie_flr(dev);
 	return 0;
 }
 
-- 
2.11.0

[PATCH 3/7] PCI: call pcie_flr from reset_chelsio_generic_dev

[Christoph Hellwig]

Instead of copy & pasting and old version of the code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/quirks.c | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 8195ca294ee5..715ed8c08fa3 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3750,20 +3750,7 @@ static int reset_chelsio_generic_dev(struct pci_dev *dev, int probe)
 				      PCI_MSIX_FLAGS_ENABLE |
 				      PCI_MSIX_FLAGS_MASKALL);
 
-	/*
-	 * Start of pcie_flr() code sequence.  This reset code is a copy of
-	 * the guts of pcie_flr() because that's not an exported function.
-	 */
-
-	if (!pci_wait_for_pending_transaction(dev))
-		dev_err(&dev->dev, "transaction is not cleared; proceeding with reset anyway\n");
-
-	pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
-	msleep(100);
-
-	/*
-	 * End of pcie_flr() code sequence.
-	 */
+	pcie_flr(dev);
 
 	/*
 	 * Restore the configuration information (BAR values, etc.) including
-- 
2.11.0

[PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index a7a430a7be2c..543ddde5f8e2 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7112,18 +7112,6 @@ static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
 }
 
 #ifdef CONFIG_PCI_IOV
-static inline void ixgbe_issue_vf_flr(struct ixgbe_adapter *adapter,
-				      struct pci_dev *vfdev)
-{
-	if (!pci_wait_for_pending_transaction(vfdev))
-		e_dev_warn("Issuing VFLR with pending transactions\n");
-
-	e_dev_err("Issuing VFLR for VF %s\n", pci_name(vfdev));
-	pcie_capability_set_word(vfdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
-
-	msleep(100);
-}
-
 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
 {
 	struct ixgbe_hw *hw = &adapter->hw;
@@ -7156,7 +7144,7 @@ static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
 		pci_read_config_word(vfdev, PCI_STATUS, &status_reg);
 		if (status_reg != IXGBE_FAILED_READ_CFG_WORD &&
 		    status_reg & PCI_STATUS_REC_MASTER_ABORT)
-			ixgbe_issue_vf_flr(adapter, vfdev);
+			pcie_flr(vfdev);
 	}
 }
 
@@ -10244,7 +10232,7 @@ static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
 		 * VFLR.  Just clean up the AER in that case.
 		 */
 		if (vfdev) {
-			ixgbe_issue_vf_flr(adapter, vfdev);
+			pcie_flr(vfdev);
 			/* Free device reference count */
 			pci_dev_put(vfdev);
 		}
-- 
2.11.0

[PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/infiniband/hw/hfi1/chip.c |  4 ++--
 drivers/infiniband/hw/hfi1/hfi.h  |  1 -
 drivers/infiniband/hw/hfi1/pcie.c | 30 ------------------------------
 3 files changed, 2 insertions(+), 33 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 121a4c920f1b..d037f72e4d96 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -13610,14 +13610,14 @@ static void init_chip(struct hfi1_devdata *dd)
 		dd_dev_info(dd, "Resetting CSRs with FLR\n");
 
 		/* do the FLR, the DC reset will remain */
-		hfi1_pcie_flr(dd);
+		pcie_flr(dd->pcidev);
 
 		/* restore command and BARs */
 		restore_pci_variables(dd);
 
 		if (is_ax(dd)) {
 			dd_dev_info(dd, "Resetting CSRs with FLR\n");
-			hfi1_pcie_flr(dd);
+			pcie_flr(dd->pcidev);
 			restore_pci_variables(dd);
 		}
 	} else {
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index 0808e3c3ba39..40d7559fa723 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1764,7 +1764,6 @@ int hfi1_pcie_init(struct pci_dev *, const struct pci_device_id *);
 void hfi1_pcie_cleanup(struct pci_dev *);
 int hfi1_pcie_ddinit(struct hfi1_devdata *, struct pci_dev *);
 void hfi1_pcie_ddcleanup(struct hfi1_devdata *);
-void hfi1_pcie_flr(struct hfi1_devdata *);
 int pcie_speeds(struct hfi1_devdata *);
 void request_msix(struct hfi1_devdata *, u32 *, struct hfi1_msix_entry *);
 void hfi1_enable_intx(struct pci_dev *);
diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c
index 0829fce06172..c81556e84831 100644
--- a/drivers/infiniband/hw/hfi1/pcie.c
+++ b/drivers/infiniband/hw/hfi1/pcie.c
@@ -240,36 +240,6 @@ void hfi1_pcie_ddcleanup(struct hfi1_devdata *dd)
 		iounmap(dd->piobase);
 }
 
-/*
- * Do a Function Level Reset (FLR) on the device.
- * Based on static function drivers/pci/pci.c:pcie_flr().
- */
-void hfi1_pcie_flr(struct hfi1_devdata *dd)
-{
-	int i;
-	u16 status;
-
-	/* no need to check for the capability - we know the device has it */
-
-	/* wait for Transaction Pending bit to clear, at most a few ms */
-	for (i = 0; i < 4; i++) {
-		if (i)
-			msleep((1 << (i - 1)) * 100);
-
-		pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVSTA, &status);
-		if (!(status & PCI_EXP_DEVSTA_TRPND))
-			goto clear;
-	}
-
-	dd_dev_err(dd, "Transaction Pending bit is not clearing, proceeding with reset anyway\n");
-
-clear:
-	pcie_capability_set_word(dd->pcidev, PCI_EXP_DEVCTL,
-				 PCI_EXP_DEVCTL_BCR_FLR);
-	/* PCIe spec requires the function to be back within 100ms */
-	msleep(100);
-}
-
 static void msix_setup(struct hfi1_devdata *dd, int pos, u32 *msixcnt,
 		       struct hfi1_msix_entry *hfi1_msix_entry)
 {
-- 
2.11.0

RE: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Byczkowski, Jakub]

Tested-by: Jakub Byczkowski <jakub.byczkowski@intel.com>

-----Original Message-----
From: linux-rdma-owner@vger.kernel.org [mailto:linux-rdma-owner@vger.kernel.org] On Behalf Of Christoph Hellwig
Sent: Friday, April 14, 2017 9:11 PM
To: Bjorn Helgaas <bhelgaas@google.com>; Cabiddu, Giovanni <giovanni.cabiddu@intel.com>; Benedetto, Salvatore <salvatore.benedetto@intel.com>; Marciniszyn, Mike <mike.marciniszyn@intel.com>; Dalessandro, Dennis <dennis.dalessandro@intel.com>; Derek Chickles <derek.chickles@caviumnetworks.com>; Satanand Burla <satananda.burla@caviumnetworks.com>; Felix Manlunas <felix.manlunas@caviumnetworks.com>; Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>; Kirsher, Jeffrey T <jeffrey.t.kirsher@intel.com>
Cc: linux-pci@vger.kernel.org; qat-linux <qat-linux@intel.com>; linux-crypto@vger.kernel.org; linux-rdma@vger.kernel.org; netdev@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/infiniband/hw/hfi1/chip.c |  4 ++--  drivers/infiniband/hw/hfi1/hfi.h  |  1 -  drivers/infiniband/hw/hfi1/pcie.c | 30 ------------------------------
 3 files changed, 2 insertions(+), 33 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 121a4c920f1b..d037f72e4d96 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -13610,14 +13610,14 @@ static void init_chip(struct hfi1_devdata *dd)
 		dd_dev_info(dd, "Resetting CSRs with FLR\n");
 
 		/* do the FLR, the DC reset will remain */
-		hfi1_pcie_flr(dd);
+		pcie_flr(dd->pcidev);
 
 		/* restore command and BARs */
 		restore_pci_variables(dd);
 
 		if (is_ax(dd)) {
 			dd_dev_info(dd, "Resetting CSRs with FLR\n");
-			hfi1_pcie_flr(dd);
+			pcie_flr(dd->pcidev);
 			restore_pci_variables(dd);
 		}
 	} else {
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index 0808e3c3ba39..40d7559fa723 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1764,7 +1764,6 @@ int hfi1_pcie_init(struct pci_dev *, const struct pci_device_id *);  void hfi1_pcie_cleanup(struct pci_dev *);  int hfi1_pcie_ddinit(struct hfi1_devdata *, struct pci_dev *);  void hfi1_pcie_ddcleanup(struct hfi1_devdata *); -void hfi1_pcie_flr(struct hfi1_devdata *);  int pcie_speeds(struct hfi1_devdata *);  void request_msix(struct hfi1_devdata *, u32 *, struct hfi1_msix_entry *);  void hfi1_enable_intx(struct pci_dev *); diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c
index 0829fce06172..c81556e84831 100644
--- a/drivers/infiniband/hw/hfi1/pcie.c
+++ b/drivers/infiniband/hw/hfi1/pcie.c
@@ -240,36 +240,6 @@ void hfi1_pcie_ddcleanup(struct hfi1_devdata *dd)
 		iounmap(dd->piobase);
 }
 
-/*
- * Do a Function Level Reset (FLR) on the device.
- * Based on static function drivers/pci/pci.c:pcie_flr().
- */
-void hfi1_pcie_flr(struct hfi1_devdata *dd) -{
-	int i;
-	u16 status;
-
-	/* no need to check for the capability - we know the device has it */
-
-	/* wait for Transaction Pending bit to clear, at most a few ms */
-	for (i = 0; i < 4; i++) {
-		if (i)
-			msleep((1 << (i - 1)) * 100);
-
-		pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVSTA, &status);
-		if (!(status & PCI_EXP_DEVSTA_TRPND))
-			goto clear;
-	}
-
-	dd_dev_err(dd, "Transaction Pending bit is not clearing, proceeding with reset anyway\n");
-
-clear:
-	pcie_capability_set_word(dd->pcidev, PCI_EXP_DEVCTL,
-				 PCI_EXP_DEVCTL_BCR_FLR);
-	/* PCIe spec requires the function to be back within 100ms */
-	msleep(100);
-}
-
 static void msix_setup(struct hfi1_devdata *dd, int pos, u32 *msixcnt,
 		       struct hfi1_msix_entry *hfi1_msix_entry)  {
--
2.11.0

RE: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Byczkowski, Jakub]

Tested-by: Jakub Byczkowski <jakub.byczkowski@intel.com>

-----Original Message-----
From: linux-rdma-owner@vger.kernel.org [mailto:linux-rdma-owner@vger.kernel.org] On Behalf Of Christoph Hellwig
Sent: Friday, April 14, 2017 9:11 PM
To: Bjorn Helgaas <bhelgaas@google.com>; Cabiddu, Giovanni <giovanni.cabiddu@intel.com>; Benedetto, Salvatore <salvatore.benedetto@intel.com>; Marciniszyn, Mike <mike.marciniszyn@intel.com>; Dalessandro, Dennis <dennis.dalessandro@intel.com>; Derek Chickles <derek.chickles@caviumnetworks.com>; Satanand Burla <satananda.burla@caviumnetworks.com>; Felix Manlunas <felix.manlunas@caviumnetworks.com>; Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>; Kirsher, Jeffrey T <jeffrey.t.kirsher@intel.com>
Cc: linux-pci@vger.kernel.org; qat-linux <qat-linux@intel.com>; linux-crypto@vger.kernel.org; linux-rdma@vger.kernel.org; netdev@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/infiniband/hw/hfi1/chip.c |  4 ++--  drivers/infiniband/hw/hfi1/hfi.h  |  1 -  drivers/infiniband/hw/hfi1/pcie.c | 30 ------------------------------
 3 files changed, 2 insertions(+), 33 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 121a4c920f1b..d037f72e4d96 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -13610,14 +13610,14 @@ static void init_chip(struct hfi1_devdata *dd)
 		dd_dev_info(dd, "Resetting CSRs with FLR\n");
 
 		/* do the FLR, the DC reset will remain */
-		hfi1_pcie_flr(dd);
+		pcie_flr(dd->pcidev);
 
 		/* restore command and BARs */
 		restore_pci_variables(dd);
 
 		if (is_ax(dd)) {
 			dd_dev_info(dd, "Resetting CSRs with FLR\n");
-			hfi1_pcie_flr(dd);
+			pcie_flr(dd->pcidev);
 			restore_pci_variables(dd);
 		}
 	} else {
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index 0808e3c3ba39..40d7559fa723 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1764,7 +1764,6 @@ int hfi1_pcie_init(struct pci_dev *, const struct pci_device_id *);  void hfi1_pcie_cleanup(struct pci_dev *);  int hfi1_pcie_ddinit(struct hfi1_devdata *, struct pci_dev *);  void hfi1_pcie_ddcleanup(struct hfi1_devdata *); -void hfi1_pcie_flr(struct hfi1_devdata *);  int pcie_speeds(struct hfi1_devdata *);  void request_msix(struct hfi1_devdata *, u32 *, struct hfi1_msix_entry *);  void hfi1_enable_intx(struct pci_dev *); diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c
index 0829fce06172..c81556e84831 100644
--- a/drivers/infiniband/hw/hfi1/pcie.c
+++ b/drivers/infiniband/hw/hfi1/pcie.c
@@ -240,36 +240,6 @@ void hfi1_pcie_ddcleanup(struct hfi1_devdata *dd)
 		iounmap(dd->piobase);
 }
 
-/*
- * Do a Function Level Reset (FLR) on the device.
- * Based on static function drivers/pci/pci.c:pcie_flr().
- */
-void hfi1_pcie_flr(struct hfi1_devdata *dd) -{
-	int i;
-	u16 status;
-
-	/* no need to check for the capability - we know the device has it */
-
-	/* wait for Transaction Pending bit to clear, at most a few ms */
-	for (i = 0; i < 4; i++) {
-		if (i)
-			msleep((1 << (i - 1)) * 100);
-
-		pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVSTA, &status);
-		if (!(status & PCI_EXP_DEVSTA_TRPND))
-			goto clear;
-	}
-
-	dd_dev_err(dd, "Transaction Pending bit is not clearing, proceeding with reset anyway\n");
-
-clear:
-	pcie_capability_set_word(dd->pcidev, PCI_EXP_DEVCTL,
-				 PCI_EXP_DEVCTL_BCR_FLR);
-	/* PCIe spec requires the function to be back within 100ms */
-	msleep(100);
-}
-
 static void msix_setup(struct hfi1_devdata *dd, int pos, u32 *msixcnt,
 		       struct hfi1_msix_entry *hfi1_msix_entry)  {
--
2.11.0

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at  http://vger.kernel.org/majordomo-info.html
--------------------------------------------------------------------

Intel Technology Poland sp. z o.o.
ul. Slowackiego 173 | 80-298 Gdansk | Sad Rejonowy Gdansk Polnoc | VII Wydzial Gospodarczy Krajowego Rejestru Sadowego - KRS 101882 | NIP 957-07-52-316 | Kapital zakladowy 200.000 PLN.

Ta wiadomosc wraz z zalacznikami jest przeznaczona dla okreslonego adresata i moze zawierac informacje poufne. W razie przypadkowego otrzymania tej wiadomosci, prosimy o powiadomienie nadawcy oraz trwale jej usuniecie; jakiekolwiek
przegladanie lub rozpowszechnianie jest zabronione.
This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by
others is strictly prohibited.

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Christoph Hellwig]

On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> Tested-by: Jakub Byczkowski <jakub.byczkowski@intel.com>

Are you (and Doug) ok with queueing this up in the PCI tree?

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Christoph Hellwig]

On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> Tested-by: Jakub Byczkowski <jakub.byczkowski@intel.com>

Are you (and Doug) ok with queueing this up in the PCI tree?

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Dennis Dalessandro]

On 04/24/2017 10:35 AM, Christoph Hellwig wrote:
> On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
>> Tested-by: Jakub Byczkowski <jakub.byczkowski-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>
> Are you (and Doug) ok with queueing this up in the PCI tree?

We are fine however Doug wants to handle it.

-Denny


--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Dennis Dalessandro]

On 04/24/2017 10:35 AM, Christoph Hellwig wrote:
> On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
>> Tested-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
>
> Are you (and Doug) ok with queueing this up in the PCI tree?

We are fine however Doug wants to handle it.

-Denny

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Doug Ledford]

On Mon, 2017-04-24 at 16:35 +0200, Christoph Hellwig wrote:
> On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> > 
> > Tested-by: Jakub Byczkowski <jakub.byczkowski-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> 
> Are you (and Doug) ok with queueing this up in the PCI tree?

I'm fine with that.  Feel free to add my Acked-by to the hfi1 patch.

-- 
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
    GPG KeyID: B826A3330E572FDD
   
Key fingerprint = AE6B 1BDA 122B 23B4 265B  1274 B826 A333 0E57 2FDD

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Doug Ledford]

On Mon, 2017-04-24 at 16:35 +0200, Christoph Hellwig wrote:
> On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> > 
> > Tested-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
> 
> Are you (and Doug) ok with queueing this up in the PCI tree?

I'm fine with that.  Feel free to add my Acked-by to the hfi1 patch.

-- 
Doug Ledford <dledford@redhat.com>
    GPG KeyID: B826A3330E572FDD
   
Key fingerprint = AE6B 1BDA 122B 23B4 265B  1274 B826 A333 0E57 2FDD

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Doug Ledford]

On Mon, 2017-04-24 at 16:35 +0200, Christoph Hellwig wrote:
> On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> > 
> > Tested-by: Jakub Byczkowski <jakub.byczkowski-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> 
> Are you (and Doug) ok with queueing this up in the PCI tree?

I'm fine with that.  Feel free to add my Acked-by to the hfi1 patch.

-- 
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
    GPG KeyID: B826A3330E572FDD
   
Key fingerprint = AE6B 1BDA 122B 23B4 265B  1274 B826 A333 0E57 2FDD

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Bjorn Helgaas]

On Mon, Apr 24, 2017 at 04:35:07PM +0200, Christoph Hellwig wrote:
> On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> > Tested-by: Jakub Byczkowski <jakub.byczkowski-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> 
> Are you (and Doug) ok with queueing this up in the PCI tree?

Applied this with Jakub's tested-by and Doug's ack to pci/virtualization
for v4.12.

This still leaves these:

  [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
  [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
  [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it

I haven't seen any response to 4 and 6.  Felix reported an unused
variable in 7.  Let me know if you'd like me to do anything with
these.

Bjorn
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Bjorn Helgaas]

On Mon, Apr 24, 2017 at 04:35:07PM +0200, Christoph Hellwig wrote:
> On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> > Tested-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
> 
> Are you (and Doug) ok with queueing this up in the PCI tree?

Applied this with Jakub's tested-by and Doug's ack to pci/virtualization
for v4.12.

This still leaves these:

  [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
  [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
  [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it

I haven't seen any response to 4 and 6.  Felix reported an unused
variable in 7.  Let me know if you'd like me to do anything with
these.

Bjorn

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Jeff Kirsher]

[-- Attachment #1: Type: text/plain, Size: 888 bytes --]

On Tue, 2017-04-25 at 14:39 -0500, Bjorn Helgaas wrote:
> On Mon, Apr 24, 2017 at 04:35:07PM +0200, Christoph Hellwig wrote:
> > On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> > > Tested-by: Jakub Byczkowski <jakub.byczkowski-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> > 
> > Are you (and Doug) ok with queueing this up in the PCI tree?
> 
> Applied this with Jakub's tested-by and Doug's ack to pci/virtualization
> for v4.12.
> 
> This still leaves these:
> 
>   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
>   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
>   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> 
> I haven't seen any response to 4 and 6.  Felix reported an unused
> variable in 7.  Let me know if you'd like me to do anything with
> these.

Just provided my ACK for ixgbe patch.

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 819 bytes --]

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Jeff Kirsher]

[-- Attachment #1: Type: text/plain, Size: 858 bytes --]

On Tue, 2017-04-25 at 14:39 -0500, Bjorn Helgaas wrote:
> On Mon, Apr 24, 2017 at 04:35:07PM +0200, Christoph Hellwig wrote:
> > On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> > > Tested-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
> > 
> > Are you (and Doug) ok with queueing this up in the PCI tree?
> 
> Applied this with Jakub's tested-by and Doug's ack to pci/virtualization
> for v4.12.
> 
> This still leaves these:
> 
>   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
>   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
>   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> 
> I haven't seen any response to 4 and 6.  Felix reported an unused
> variable in 7.  Let me know if you'd like me to do anything with
> these.

Just provided my ACK for ixgbe patch.

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 819 bytes --]

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Jeff Kirsher]

[-- Attachment #1: Type: text/plain, Size: 888 bytes --]

On Tue, 2017-04-25 at 14:39 -0500, Bjorn Helgaas wrote:
> On Mon, Apr 24, 2017 at 04:35:07PM +0200, Christoph Hellwig wrote:
> > On Mon, Apr 24, 2017 at 02:16:31PM +0000, Byczkowski, Jakub wrote:
> > > Tested-by: Jakub Byczkowski <jakub.byczkowski-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> > 
> > Are you (and Doug) ok with queueing this up in the PCI tree?
> 
> Applied this with Jakub's tested-by and Doug's ack to pci/virtualization
> for v4.12.
> 
> This still leaves these:
> 
>   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
>   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
>   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> 
> I haven't seen any response to 4 and 6.  Felix reported an unused
> variable in 7.  Let me know if you'd like me to do anything with
> these.

Just provided my ACK for ixgbe patch.

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 819 bytes --]

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Christoph Hellwig]

On Tue, Apr 25, 2017 at 02:39:55PM -0500, Bjorn Helgaas wrote:
> This still leaves these:
> 
>   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
>   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
>   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> 
> I haven't seen any response to 4 and 6.  Felix reported an unused
> variable in 7.  Let me know if you'd like me to do anything with
> these.

Now that Jeff ACKed 4 it might be worth to add it to the pci tree last
minute.  I'll resend liquidio and qat to the respective maintainers for
the next merge window.

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Christoph Hellwig]

On Tue, Apr 25, 2017 at 02:39:55PM -0500, Bjorn Helgaas wrote:
> This still leaves these:
> 
>   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
>   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
>   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> 
> I haven't seen any response to 4 and 6.  Felix reported an unused
> variable in 7.  Let me know if you'd like me to do anything with
> these.

Now that Jeff ACKed 4 it might be worth to add it to the pci tree last
minute.  I'll resend liquidio and qat to the respective maintainers for
the next merge window.

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Christoph Hellwig]

On Tue, Apr 25, 2017 at 02:39:55PM -0500, Bjorn Helgaas wrote:
> This still leaves these:
> 
>   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
>   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
>   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> 
> I haven't seen any response to 4 and 6.  Felix reported an unused
> variable in 7.  Let me know if you'd like me to do anything with
> these.

Now that Jeff ACKed 4 it might be worth to add it to the pci tree last
minute.  I'll resend liquidio and qat to the respective maintainers for
the next merge window.

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Bjorn Helgaas]

On Thu, Apr 27, 2017 at 08:47:58AM +0200, Christoph Hellwig wrote:
> On Tue, Apr 25, 2017 at 02:39:55PM -0500, Bjorn Helgaas wrote:
> > This still leaves these:
> > 
> >   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
> >   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
> >   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> > 
> > I haven't seen any response to 4 and 6.  Felix reported an unused
> > variable in 7.  Let me know if you'd like me to do anything with
> > these.
> 
> Now that Jeff ACKed 4 it might be worth to add it to the pci tree last
> minute.  I'll resend liquidio and qat to the respective maintainers for
> the next merge window.

I applied 4 with Jeff's ack to pci/virtualization for v4.12, thanks!

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Bjorn Helgaas]

On Thu, Apr 27, 2017 at 08:47:58AM +0200, Christoph Hellwig wrote:
> On Tue, Apr 25, 2017 at 02:39:55PM -0500, Bjorn Helgaas wrote:
> > This still leaves these:
> > 
> >   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
> >   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
> >   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> > 
> > I haven't seen any response to 4 and 6.  Felix reported an unused
> > variable in 7.  Let me know if you'd like me to do anything with
> > these.
> 
> Now that Jeff ACKed 4 it might be worth to add it to the pci tree last
> minute.  I'll resend liquidio and qat to the respective maintainers for
> the next merge window.

I applied 4 with Jeff's ack to pci/virtualization for v4.12, thanks!

Re: [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Bjorn Helgaas]

On Thu, Apr 27, 2017 at 08:47:58AM +0200, Christoph Hellwig wrote:
> On Tue, Apr 25, 2017 at 02:39:55PM -0500, Bjorn Helgaas wrote:
> > This still leaves these:
> > 
> >   [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
> >   [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
> >   [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
> > 
> > I haven't seen any response to 4 and 6.  Felix reported an unused
> > variable in 7.  Let me know if you'd like me to do anything with
> > these.
> 
> Now that Jeff ACKed 4 it might be worth to add it to the pci tree last
> minute.  I'll resend liquidio and qat to the respective maintainers for
> the next merge window.

I applied 4 with Jeff's ack to pci/virtualization for v4.12, thanks!

[PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/crypto/qat/qat_common/adf_aer.c | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/drivers/crypto/qat/qat_common/adf_aer.c b/drivers/crypto/qat/qat_common/adf_aer.c
index 2839fccdd84b..d3e25c37dc33 100644
--- a/drivers/crypto/qat/qat_common/adf_aer.c
+++ b/drivers/crypto/qat/qat_common/adf_aer.c
@@ -109,20 +109,7 @@ EXPORT_SYMBOL_GPL(adf_reset_sbr);
 
 void adf_reset_flr(struct adf_accel_dev *accel_dev)
 {
-	struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
-	u16 control = 0;
-	int pos = 0;
-
-	dev_info(&GET_DEV(accel_dev), "Function level reset\n");
-	pos = pci_pcie_cap(pdev);
-	if (!pos) {
-		dev_err(&GET_DEV(accel_dev), "Restart device failed\n");
-		return;
-	}
-	pci_read_config_word(pdev, pos + PCI_EXP_DEVCTL, &control);
-	control |= PCI_EXP_DEVCTL_BCR_FLR;
-	pci_write_config_word(pdev, pos + PCI_EXP_DEVCTL, control);
-	msleep(100);
+	pcie_flr(accel_to_pci_dev(accel_dev));
 }
 EXPORT_SYMBOL_GPL(adf_reset_flr);
 
-- 
2.11.0

[PATCH 7/7] liquidio: use pcie_flr instead of duplicating it

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/net/ethernet/cavium/liquidio/lio_vf_main.c | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index 9d5e03502c76..afdbf7fa016e 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -869,20 +869,7 @@ static void octeon_pci_flr(struct octeon_device *oct)
 	pci_write_config_word(oct->pci_dev, PCI_COMMAND,
 			      PCI_COMMAND_INTX_DISABLE);
 
-	/* Wait for Transaction Pending bit clean */
-	msleep(100);
-	pcie_capability_read_word(oct->pci_dev, PCI_EXP_DEVSTA, &status);
-	if (status & PCI_EXP_DEVSTA_TRPND) {
-		dev_info(&oct->pci_dev->dev, "Function reset incomplete after 100ms, sleeping for 5 seconds\n");
-		ssleep(5);
-		pcie_capability_read_word(oct->pci_dev, PCI_EXP_DEVSTA,
-					  &status);
-		if (status & PCI_EXP_DEVSTA_TRPND)
-			dev_info(&oct->pci_dev->dev, "Function reset still incomplete after 5s, reset anyway\n");
-	}
-	pcie_capability_set_word(oct->pci_dev, PCI_EXP_DEVCTL,
-				 PCI_EXP_DEVCTL_BCR_FLR);
-	mdelay(100);
+	pcie_flr(oct->pci_dev);
 
 	pci_cfg_access_unlock(oct->pci_dev);
 
-- 
2.11.0

Re: [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it

[Felix Manlunas]

From: Christoph Hellwig <hch@lst.de> 
Date: Fri, 14 Apr 2017 21:11:31 +0200

> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/net/ethernet/cavium/liquidio/lio_vf_main.c | 15 +--------------
>  1 file changed, 1 insertion(+), 14 deletions(-)
> 
> diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
> index 9d5e03502c76..afdbf7fa016e 100644
> --- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
> +++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
> @@ -869,20 +869,7 @@ static void octeon_pci_flr(struct octeon_device *oct)
>  	pci_write_config_word(oct->pci_dev, PCI_COMMAND,
>  			      PCI_COMMAND_INTX_DISABLE);
>  
> -	/* Wait for Transaction Pending bit clean */
> -	msleep(100);
> -	pcie_capability_read_word(oct->pci_dev, PCI_EXP_DEVSTA, &status);
> -	if (status & PCI_EXP_DEVSTA_TRPND) {
> -		dev_info(&oct->pci_dev->dev, "Function reset incomplete after 100ms, sleeping for 5 seconds\n");
> -		ssleep(5);
> -		pcie_capability_read_word(oct->pci_dev, PCI_EXP_DEVSTA,
> -					  &status);
> -		if (status & PCI_EXP_DEVSTA_TRPND)
> -			dev_info(&oct->pci_dev->dev, "Function reset still incomplete after 5s, reset anyway\n");
> -	}
> -	pcie_capability_set_word(oct->pci_dev, PCI_EXP_DEVCTL,
> -				 PCI_EXP_DEVCTL_BCR_FLR);
> -	mdelay(100);
> +	pcie_flr(oct->pci_dev);
>  
>  	pci_cfg_access_unlock(oct->pci_dev);
>  
> -- 
> 2.11.0
> 

This patch works.  I tested it on a LiquidIO NIC and the "next" branch of the
PCI git tree.

But the patch causes a gcc warning:

    .../lio_vf_main.c: In function 'octeon_pci_flr':
    .../lio_vf_main.c:862:6: warning: unused variable 'status' [-Wunused-variable]

Can you rework the patch to get rid of the warning?  Thanks.

Re: export pcie_flr and remove copies of it in drivers V2

[Bjorn Helgaas]

On Fri, Apr 14, 2017 at 09:11:24PM +0200, Christoph Hellwig wrote:
> Hi all,
> 
> this exports the PCI layer pcie_flr helper, and removes various opencoded
> copies of it.
> 
> Changes since V1:
>  - rebase on top of the pci/virtualization branch
>  - fixed the probe case in __pci_dev_reset
>  - added ACKs from Bjorn

Applied the first three patches:
 
  bc13871ef35a PCI: Export pcie_flr()
  e641c375d414 PCI: Call pcie_flr() from reset_intel_82599_sfp_virtfn()
  40e0901ea4bf PCI: Call pcie_flr() from reset_chelsio_generic_dev()

to pci/virtualization for v4.12, thanks!

Re: export pcie_flr and remove copies of it in drivers V2

[Leon Romanovsky]

[-- Attachment #1: Type: text/plain, Size: 844 bytes --]

On Tue, Apr 18, 2017 at 01:36:12PM -0500, Bjorn Helgaas wrote:
> On Fri, Apr 14, 2017 at 09:11:24PM +0200, Christoph Hellwig wrote:
> > Hi all,
> >
> > this exports the PCI layer pcie_flr helper, and removes various opencoded
> > copies of it.
> >
> > Changes since V1:
> >  - rebase on top of the pci/virtualization branch
> >  - fixed the probe case in __pci_dev_reset
> >  - added ACKs from Bjorn
>
> Applied the first three patches:
>
>   bc13871ef35a PCI: Export pcie_flr()
>   e641c375d414 PCI: Call pcie_flr() from reset_intel_82599_sfp_virtfn()
>   40e0901ea4bf PCI: Call pcie_flr() from reset_chelsio_generic_dev()
>

Bjorn,

How do you suggest to proceed with other patches? They should be applied
to your tree either, because they depend on "bc13871ef35a PCI: Export
pcie_flr()".

Thanks


> to pci/virtualization for v4.12, thanks!

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

Re: export pcie_flr and remove copies of it in drivers V2

[Leon Romanovsky]

[-- Attachment #1: Type: text/plain, Size: 1091 bytes --]

On Wed, Apr 19, 2017 at 08:37:37AM +0300, Leon Romanovsky wrote:
> On Tue, Apr 18, 2017 at 01:36:12PM -0500, Bjorn Helgaas wrote:
> > On Fri, Apr 14, 2017 at 09:11:24PM +0200, Christoph Hellwig wrote:
> > > Hi all,
> > >
> > > this exports the PCI layer pcie_flr helper, and removes various opencoded
> > > copies of it.
> > >
> > > Changes since V1:
> > >  - rebase on top of the pci/virtualization branch
> > >  - fixed the probe case in __pci_dev_reset
> > >  - added ACKs from Bjorn
> >
> > Applied the first three patches:
> >
> >   bc13871ef35a PCI: Export pcie_flr()
> >   e641c375d414 PCI: Call pcie_flr() from reset_intel_82599_sfp_virtfn()
> >   40e0901ea4bf PCI: Call pcie_flr() from reset_chelsio_generic_dev()
> >
>
> Bjorn,
>
> How do you suggest to proceed with other patches? They should be applied
> to your tree either, because they depend on "bc13871ef35a PCI: Export
> pcie_flr()".

I finally caught the old emails and found the answer by myself.
http://marc.info/?l=linux-rdma&m=149218545228343&w=2

Thanks

>
> Thanks
>
>
> > to pci/virtualization for v4.12, thanks!



[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

Re: export pcie_flr and remove copies of it in drivers V2

[Leon Romanovsky]

[-- Attachment #1: Type: text/plain, Size: 1091 bytes --]

On Wed, Apr 19, 2017 at 08:37:37AM +0300, Leon Romanovsky wrote:
> On Tue, Apr 18, 2017 at 01:36:12PM -0500, Bjorn Helgaas wrote:
> > On Fri, Apr 14, 2017 at 09:11:24PM +0200, Christoph Hellwig wrote:
> > > Hi all,
> > >
> > > this exports the PCI layer pcie_flr helper, and removes various opencoded
> > > copies of it.
> > >
> > > Changes since V1:
> > >  - rebase on top of the pci/virtualization branch
> > >  - fixed the probe case in __pci_dev_reset
> > >  - added ACKs from Bjorn
> >
> > Applied the first three patches:
> >
> >   bc13871ef35a PCI: Export pcie_flr()
> >   e641c375d414 PCI: Call pcie_flr() from reset_intel_82599_sfp_virtfn()
> >   40e0901ea4bf PCI: Call pcie_flr() from reset_chelsio_generic_dev()
> >
>
> Bjorn,
>
> How do you suggest to proceed with other patches? They should be applied
> to your tree either, because they depend on "bc13871ef35a PCI: Export
> pcie_flr()".

I finally caught the old emails and found the answer by myself.
http://marc.info/?l=linux-rdma&m=149218545228343&w=2

Thanks

>
> Thanks
>
>
> > to pci/virtualization for v4.12, thanks!



[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

export pcie_flr and remove copies of it in drivers

[Christoph Hellwig]

Hi all,

this exports the PCI layer pcie_flr helper, and removes various opencoded
copies of it.

[PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it

[Christoph Hellwig]

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/infiniband/hw/hfi1/chip.c |  4 ++--
 drivers/infiniband/hw/hfi1/hfi.h  |  1 -
 drivers/infiniband/hw/hfi1/pcie.c | 30 ------------------------------
 3 files changed, 2 insertions(+), 33 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 121a4c920f1b..d037f72e4d96 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -13610,14 +13610,14 @@ static void init_chip(struct hfi1_devdata *dd)
 		dd_dev_info(dd, "Resetting CSRs with FLR\n");
 
 		/* do the FLR, the DC reset will remain */
-		hfi1_pcie_flr(dd);
+		pcie_flr(dd->pcidev);
 
 		/* restore command and BARs */
 		restore_pci_variables(dd);
 
 		if (is_ax(dd)) {
 			dd_dev_info(dd, "Resetting CSRs with FLR\n");
-			hfi1_pcie_flr(dd);
+			pcie_flr(dd->pcidev);
 			restore_pci_variables(dd);
 		}
 	} else {
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index 0808e3c3ba39..40d7559fa723 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1764,7 +1764,6 @@ int hfi1_pcie_init(struct pci_dev *, const struct pci_device_id *);
 void hfi1_pcie_cleanup(struct pci_dev *);
 int hfi1_pcie_ddinit(struct hfi1_devdata *, struct pci_dev *);
 void hfi1_pcie_ddcleanup(struct hfi1_devdata *);
-void hfi1_pcie_flr(struct hfi1_devdata *);
 int pcie_speeds(struct hfi1_devdata *);
 void request_msix(struct hfi1_devdata *, u32 *, struct hfi1_msix_entry *);
 void hfi1_enable_intx(struct pci_dev *);
diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c
index 0829fce06172..c81556e84831 100644
--- a/drivers/infiniband/hw/hfi1/pcie.c
+++ b/drivers/infiniband/hw/hfi1/pcie.c
@@ -240,36 +240,6 @@ void hfi1_pcie_ddcleanup(struct hfi1_devdata *dd)
 		iounmap(dd->piobase);
 }
 
-/*
- * Do a Function Level Reset (FLR) on the device.
- * Based on static function drivers/pci/pci.c:pcie_flr().
- */
-void hfi1_pcie_flr(struct hfi1_devdata *dd)
-{
-	int i;
-	u16 status;
-
-	/* no need to check for the capability - we know the device has it */
-
-	/* wait for Transaction Pending bit to clear, at most a few ms */
-	for (i = 0; i < 4; i++) {
-		if (i)
-			msleep((1 << (i - 1)) * 100);
-
-		pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVSTA, &status);
-		if (!(status & PCI_EXP_DEVSTA_TRPND))
-			goto clear;
-	}
-
-	dd_dev_err(dd, "Transaction Pending bit is not clearing, proceeding with reset anyway\n");
-
-clear:
-	pcie_capability_set_word(dd->pcidev, PCI_EXP_DEVCTL,
-				 PCI_EXP_DEVCTL_BCR_FLR);
-	/* PCIe spec requires the function to be back within 100ms */
-	msleep(100);
-}
-
 static void msix_setup(struct hfi1_devdata *dd, int pos, u32 *msixcnt,
 		       struct hfi1_msix_entry *hfi1_msix_entry)
 {
-- 
2.11.0