linux-kernel - [PATCH 4.14 020/293] qed: Set the doorbell address correctly

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Date:   Mon, 29 Jul 2019 21:18:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ariel Elior <ariel.elior@...vell.com>,
        Denis Bolotin <denis.bolotin@...vell.com>,
        Michal Kalderon <michal.kalderon@...vell.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 020/293] qed: Set the doorbell address correctly

[ Upstream commit 8366d520019f366fabd6c7a13032bdcd837e18d4 ]

In 100g mode the doorbell bar is united for both engines. Set
the correct offset in the hwfn so that the doorbell returned
for RoCE is in the affined hwfn.

Signed-off-by: Ariel Elior <ariel.elior@...vell.com>
Signed-off-by: Denis Bolotin <denis.bolotin@...vell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@...vell.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/qlogic/qed/qed_dev.c  | 29 ++++++++++++++--------
 drivers/net/ethernet/qlogic/qed/qed_rdma.c |  2 +-
 2 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index 410528e7d927..c4e8bf0773fe 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -2947,6 +2947,7 @@ static int qed_get_dev_info(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 static int qed_hw_prepare_single(struct qed_hwfn *p_hwfn,
 				 void __iomem *p_regview,
 				 void __iomem *p_doorbells,
+				 u64 db_phys_addr,
 				 enum qed_pci_personality personality)
 {
 	int rc = 0;
@@ -2954,6 +2955,7 @@ static int qed_hw_prepare_single(struct qed_hwfn *p_hwfn,
 	/* Split PCI bars evenly between hwfns */
 	p_hwfn->regview = p_regview;
 	p_hwfn->doorbells = p_doorbells;
+	p_hwfn->db_phys_addr = db_phys_addr;
 
 	if (IS_VF(p_hwfn->cdev))
 		return qed_vf_hw_prepare(p_hwfn);
@@ -3036,7 +3038,9 @@ int qed_hw_prepare(struct qed_dev *cdev,
 	/* Initialize the first hwfn - will learn number of hwfns */
 	rc = qed_hw_prepare_single(p_hwfn,
 				   cdev->regview,
-				   cdev->doorbells, personality);
+				   cdev->doorbells,
+				   cdev->db_phys_addr,
+				   personality);
 	if (rc)
 		return rc;
 
@@ -3045,22 +3049,25 @@ int qed_hw_prepare(struct qed_dev *cdev,
 	/* Initialize the rest of the hwfns */
 	if (cdev->num_hwfns > 1) {
 		void __iomem *p_regview, *p_doorbell;
-		u8 __iomem *addr;
+		u64 db_phys_addr;
+		u32 offset;
 
 		/* adjust bar offset for second engine */
-		addr = cdev->regview +
-		       qed_hw_bar_size(p_hwfn, p_hwfn->p_main_ptt,
-				       BAR_ID_0) / 2;
-		p_regview = addr;
+		offset = qed_hw_bar_size(p_hwfn, p_hwfn->p_main_ptt,
+					 BAR_ID_0) / 2;
+		p_regview = cdev->regview + offset;
 
-		addr = cdev->doorbells +
-		       qed_hw_bar_size(p_hwfn, p_hwfn->p_main_ptt,
-				       BAR_ID_1) / 2;
-		p_doorbell = addr;
+		offset = qed_hw_bar_size(p_hwfn, p_hwfn->p_main_ptt,
+					 BAR_ID_1) / 2;
+
+		p_doorbell = cdev->doorbells + offset;
+
+		db_phys_addr = cdev->db_phys_addr + offset;
 
 		/* prepare second hw function */
 		rc = qed_hw_prepare_single(&cdev->hwfns[1], p_regview,
-					   p_doorbell, personality);
+					   p_doorbell, db_phys_addr,
+					   personality);
 
 		/* in case of error, need to free the previously
 		 * initiliazed hwfn 0.
diff --git a/drivers/net/ethernet/qlogic/qed/qed_rdma.c b/drivers/net/ethernet/qlogic/qed/qed_rdma.c
index 1b6554866138..1e13dea66989 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_rdma.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_rdma.c
@@ -753,7 +753,7 @@ static int qed_rdma_add_user(void *rdma_cxt,
 				     dpi_start_offset +
 				     ((out_params->dpi) * p_hwfn->dpi_size));
 
-	out_params->dpi_phys_addr = p_hwfn->cdev->db_phys_addr +
+	out_params->dpi_phys_addr = p_hwfn->db_phys_addr +
 				    dpi_start_offset +
 				    ((out_params->dpi) * p_hwfn->dpi_size);
 
-- 
2.20.1