netdev - [PATCH v2 2/5] ravb: Separate handling of irq enable/disable regs into feature

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220509142431.24898-3-phil.edworthy@renesas.com>
Date:   Mon,  9 May 2022 15:24:28 +0100
From:   Phil Edworthy <phil.edworthy@...esas.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Phil Edworthy <phil.edworthy@...esas.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Subject: [PATCH v2 2/5] ravb: Separate handling of irq enable/disable regs into feature

Currently, when the HW has a single interrupt, the driver uses the
GIC, TIC, RIC0 registers to enable and disable interrupts.
When the HW has multiple interrupts, it uses the GIE, GID, TIE, TID,
RIE0, RID0 registers.

However, other devices, e.g. RZ/V2M, have multiple irqs and only have
the GIC, TIC, RIC0 registers.
Therefore, split this into a separate feature.

Signed-off-by: Phil Edworthy <phil.edworthy@...esas.com>
Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
---
v2:
 - Renamed irq_en_dis_regs to irq_en_dis
 - Squashed use of GIC reg versus GIE/GID into this patch and got rid
   of separate gptp_ptm_gic feature.
 - Minor editing of the commit msg
---
 drivers/net/ethernet/renesas/ravb.h      | 1 +
 drivers/net/ethernet/renesas/ravb_main.c | 5 +++--
 drivers/net/ethernet/renesas/ravb_ptp.c  | 4 ++--
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 08062d73df10..0ec8256f7eef 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1027,6 +1027,7 @@ struct ravb_hw_info {
 	unsigned tx_counters:1;		/* E-MAC has TX counters */
 	unsigned carrier_counters:1;	/* E-MAC has carrier counters */
 	unsigned multi_irqs:1;		/* AVB-DMAC and E-MAC has multiple irqs */
+	unsigned irq_en_dis_regs:1;	/* Has separate irq enable and disable regs */
 	unsigned gptp:1;		/* AVB-DMAC has gPTP support */
 	unsigned ccc_gac:1;		/* AVB-DMAC has gPTP support active in config mode */
 	unsigned nc_queues:1;		/* AVB-DMAC has RX and TX NC queues */
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 525d66f71f02..5f45c8d68f11 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1124,7 +1124,7 @@ static bool ravb_queue_interrupt(struct net_device *ndev, int q)
 	if (((ris0 & ric0) & BIT(q)) || ((tis  & tic)  & BIT(q))) {
 		if (napi_schedule_prep(&priv->napi[q])) {
 			/* Mask RX and TX interrupts */
-			if (!info->multi_irqs) {
+			if (!info->irq_en_dis_regs) {
 				ravb_write(ndev, ric0 & ~BIT(q), RIC0);
 				ravb_write(ndev, tic & ~BIT(q), TIC);
 			} else {
@@ -1306,7 +1306,7 @@ static int ravb_poll(struct napi_struct *napi, int budget)
 
 	/* Re-enable RX/TX interrupts */
 	spin_lock_irqsave(&priv->lock, flags);
-	if (!info->multi_irqs) {
+	if (!info->irq_en_dis_regs) {
 		ravb_modify(ndev, RIC0, mask, mask);
 		ravb_modify(ndev, TIC,  mask, mask);
 	} else {
@@ -2410,6 +2410,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
 	.internal_delay = 1,
 	.tx_counters = 1,
 	.multi_irqs = 1,
+	.irq_en_dis_regs = 1,
 	.ccc_gac = 1,
 	.nc_queues = 1,
 	.magic_pkt = 1,
diff --git a/drivers/net/ethernet/renesas/ravb_ptp.c b/drivers/net/ethernet/renesas/ravb_ptp.c
index c099656dd75b..a7726c2ed594 100644
--- a/drivers/net/ethernet/renesas/ravb_ptp.c
+++ b/drivers/net/ethernet/renesas/ravb_ptp.c
@@ -254,7 +254,7 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp,
 		error = ravb_ptp_update_compare(priv, (u32)start_ns);
 		if (!error) {
 			/* Unmask interrupt */
-			if (!info->multi_irqs)
+			if (!info->irq_en_dis_regs)
 				ravb_modify(ndev, GIC, GIC_PTME, GIC_PTME);
 			else
 				ravb_write(ndev, GIE_PTMS0, GIE);
@@ -266,7 +266,7 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp,
 		perout->period = 0;
 
 		/* Mask interrupt */
-		if (!info->multi_irqs)
+		if (!info->irq_en_dis_regs)
 			ravb_modify(ndev, GIC, GIC_PTME, 0);
 		else
 			ravb_write(ndev, GID_PTMD0, GID);
-- 
2.32.0