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From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
To: davem@davemloft.net
Cc: Ngai-Mint Kwan <ngai-mint.kwan@intel.com>,
	netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com,
	jogreene@redhat.com, guru.anbalagane@oracle.com,
	Jacob Keller <jacob.e.keller@intel.com>,
	Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Subject: [net-next 04/20] fm10k: Reset mailbox global interrupts
Date: Wed, 20 Jul 2016 15:23:42 -0700	[thread overview]
Message-ID: <1469053438-85381-5-git-send-email-jeffrey.t.kirsher@intel.com> (raw)
In-Reply-To: <1469053438-85381-1-git-send-email-jeffrey.t.kirsher@intel.com>

From: Ngai-Mint Kwan <ngai-mint.kwan@intel.com>

When a data path reset is initiated, write control to the PCIE_GMBX is
yanked from the switch manager. The switch manager writes to this
register to clear mailbox global interrupt bits as part of its mailbox
interrupt handling routine. When the device recovers from the data path
reset and these bits are not cleared, it will prevent future mailbox
global interrupts from being triggered. Upon confirming that the device
has exited from a data path reset, clear these bits to ensure the proper
functioning of the mailbox global interrupt.

Signed-off-by: Ngai-Mint Kwan <ngai-mint.kwan@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_mbx.h | 2 ++
 drivers/net/ethernet/intel/fm10k/fm10k_pf.c  | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_mbx.h b/drivers/net/ethernet/intel/fm10k/fm10k_mbx.h
index b7dbc8a..35c1dba 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_mbx.h
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_mbx.h
@@ -41,6 +41,8 @@ struct fm10k_mbx_info;
 #define FM10K_MBX_ACK_INTERRUPT			0x00000010
 #define FM10K_MBX_INTERRUPT_ENABLE		0x00000020
 #define FM10K_MBX_INTERRUPT_DISABLE		0x00000040
+#define FM10K_MBX_GLOBAL_REQ_INTERRUPT		0x00000200
+#define FM10K_MBX_GLOBAL_ACK_INTERRUPT		0x00000400
 #define FM10K_MBICR(_n)		((_n) + 0x18840)
 #define FM10K_GMBX		0x18842
 
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
index dc75507..69e2c82 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pf.c
@@ -77,6 +77,10 @@ static s32 fm10k_reset_hw_pf(struct fm10k_hw *hw)
 	if (!(reg & FM10K_IP_NOTINRESET))
 		err = FM10K_ERR_RESET_FAILED;
 
+	/* Reset mailbox global interrupts */
+	reg = FM10K_MBX_GLOBAL_REQ_INTERRUPT | FM10K_MBX_GLOBAL_ACK_INTERRUPT;
+	fm10k_write_reg(hw, FM10K_GMBX, reg);
+
 out:
 	return err;
 }
-- 
2.5.5

  parent reply	other threads:[~2016-07-20 22:24 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-20 22:23 [net-next 00/20][pull request] 100GbE Intel Wired LAN Driver Updates 2016-07-20 Jeff Kirsher
2016-07-20 22:23 ` [net-next 01/20] fm10k: no need to continue in fm10k_down if __FM10K_DOWN already set Jeff Kirsher
2016-07-20 22:23 ` [net-next 02/20] fm10k: avoid possible null pointer dereference in fm10k_update_stats Jeff Kirsher
2016-07-20 22:23 ` [net-next 03/20] fm10k: prevent multiple threads updating statistics Jeff Kirsher
2016-07-20 22:23 ` Jeff Kirsher [this message]
2016-07-20 22:23 ` [net-next 05/20] fm10k: don't stop reset due to FM10K_ERR_REQUESTS_PENDING Jeff Kirsher
2016-07-20 22:23 ` [net-next 06/20] fm10k: perform data path reset even when switch is not ready Jeff Kirsher
2016-07-20 22:23 ` [net-next 07/20] fm10k: use actual hardware registers when checking for pending Tx Jeff Kirsher
2016-07-20 22:23 ` [net-next 08/20] fm10k: only warn when stop_hw fails with FM10K_ERR_REQUESTS_PENDING Jeff Kirsher
2016-07-20 22:23 ` [net-next 09/20] fm10k: wait for queues to drain if stop_hw() fails once Jeff Kirsher
2016-07-20 22:23 ` [net-next 10/20] fm10k: split fm10k_reinit into two functions Jeff Kirsher
2016-07-20 22:23 ` [net-next 11/20] fm10k: implement prepare_suspend and handle_resume Jeff Kirsher
2016-07-20 22:23 ` [net-next 12/20] fm10k: use common reset flow when handling io errors from PCI stack Jeff Kirsher
2016-07-20 22:23 ` [net-next 13/20] fm10k: implement reset_notify handler for PCIe FLR events Jeff Kirsher
2016-07-20 22:23 ` [net-next 14/20] fm10k: use common flow for suspend and resume Jeff Kirsher
2016-07-20 22:23 ` [net-next 15/20] fm10k: enable bus master after every reset Jeff Kirsher
2016-07-20 22:23 ` [net-next 16/20] fm10k: check if PCIe link is restored Jeff Kirsher
2016-07-21 10:51   ` Sergei Shtylyov
2016-07-21 20:13     ` ~~ Keller, Jacob E
2016-07-20 22:23 ` [net-next 17/20] fm10k: implement request_lport_map pointer Jeff Kirsher
2016-07-20 22:23 ` [net-next 18/20] fm10k: force link to remain down for at least a second on resume events Jeff Kirsher
2016-07-20 22:23 ` [net-next 19/20] fm10k: return proper error code when pci_enable_msix_range fails Jeff Kirsher
2016-07-20 22:23 ` [net-next 20/20] fm10k: bump version number Jeff Kirsher
2016-07-21  5:05 ` [net-next 00/20][pull request] 100GbE Intel Wired LAN Driver Updates 2016-07-20 David Miller

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