From: Arindam Nath <arindam.nath@amd.com>
To: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>,
Jon Mason <jdmason@kudzu.us>, Dave Jiang <dave.jiang@intel.com>,
Allen Hubbe <allenbh@gmail.com>, Jiasen Lin <linjiasen@hygon.cn>,
Sanjay R Mehta <sanju.mehta@amd.com>
Cc: linux-ntb@googlegroups.com, linux-kernel@vger.kernel.org,
Arindam Nath <arindam.nath@amd.com>
Subject: [PATCH 03/15] NTB: Enable link up and down event notification
Date: Wed, 5 Feb 2020 21:24:20 +0530 [thread overview]
Message-ID: <1fb68eb0ee7ee636ab92bb0b3b7340c56f4a20c3.1580914232.git.arindam.nath@amd.com> (raw)
In-Reply-To: <cover.1580914232.git.arindam.nath@amd.com>
In-Reply-To: <cover.1580914232.git.arindam.nath@amd.com>
Link-Up and Link-Down events can occur irrespective
of whether a data transfer is in progress or not.
So we need to enable the interrupt delivery for
these events early during driver load.
Signed-off-by: Arindam Nath <arindam.nath@amd.com>
---
drivers/ntb/hw/amd/ntb_hw_amd.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c
index 150e4db11485..111f33ff2bd7 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.c
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.c
@@ -994,6 +994,7 @@ static enum ntb_topo amd_get_topo(struct amd_ntb_dev *ndev)
static int amd_init_dev(struct amd_ntb_dev *ndev)
{
+ void __iomem *mmio = ndev->self_mmio;
struct pci_dev *pdev;
int rc = 0;
@@ -1015,6 +1016,10 @@ static int amd_init_dev(struct amd_ntb_dev *ndev)
ndev->db_valid_mask = BIT_ULL(ndev->db_count) - 1;
+ /* Enable Link-Up and Link-Down event interrupts */
+ ndev->int_mask &= ~(AMD_LINK_UP_EVENT | AMD_LINK_DOWN_EVENT);
+ writel(ndev->int_mask, mmio + AMD_INTMASK_OFFSET);
+
return 0;
}
--
2.17.1
next prev parent reply other threads:[~2020-02-05 15:55 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-05 15:54 [PATCH 00/15] AMD ntb driver fixes and improvements Arindam Nath
2020-02-05 15:54 ` [PATCH 01/15] NTB: Fix access to link status and control register Arindam Nath
2020-02-05 15:54 ` [PATCH 02/15] NTB: clear interrupt status register Arindam Nath
2020-02-05 15:54 ` Arindam Nath [this message]
2020-02-05 15:54 ` [PATCH 04/15] NTB: define a new function to get link status Arindam Nath
2020-02-05 15:54 ` [PATCH 05/15] NTB: return the side info status from amd_poll_link Arindam Nath
2020-02-05 15:54 ` [PATCH 06/15] NTB: set peer_sta within event handler itself Arindam Nath
2020-02-05 15:54 ` [PATCH 07/15] NTB: remove handling of peer_sta from amd_link_is_up Arindam Nath
2020-02-05 15:54 ` [PATCH 08/15] NTB: handle link down event correctly Arindam Nath
2020-02-05 15:54 ` [PATCH 09/15] NTB: handle link up, D0 and D3 events correctly Arindam Nath
2020-02-05 15:54 ` [PATCH 10/15] NTB: move ntb_ctrl handling to init and deinit Arindam Nath
2020-02-05 15:54 ` [PATCH 11/15] NTB: add helper functions to set and clear sideinfo Arindam Nath
2020-02-05 15:54 ` [PATCH 12/15] NTB: return link up status correctly for PRI and SEC Arindam Nath
2020-02-05 15:54 ` [PATCH 13/15] NTB: remove redundant setting of DB valid mask Arindam Nath
2020-02-05 15:54 ` [PATCH 14/15] NTB: send DB event when driver is loaded or un-loaded Arindam Nath
2020-02-05 15:54 ` [PATCH 15/15] NTB: add pci shutdown handler for AMD NTB Arindam Nath
2020-02-07 10:58 ` [PATCH 00/15] AMD ntb driver fixes and improvements Sanjay R Mehta
2020-03-13 0:25 ` Jon Mason
2020-03-30 18:43 ` Nath, Arindam
2020-03-30 21:09 ` Jon Mason
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