All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jouni Malinen <jouni@codeaurora.org>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org,
	Baochen Qiang <bqiang@codeaurora.org>,
	Jouni Malinen <jouni@codeaurora.org>
Subject: [PATCH 3/5] ath11k: Fix inaccessible debug registers
Date: Mon, 13 Sep 2021 21:02:44 +0300	[thread overview]
Message-ID: <20210913180246.193388-3-jouni@codeaurora.org> (raw)
In-Reply-To: <20210913180246.193388-1-jouni@codeaurora.org>

From: Baochen Qiang <bqiang@codeaurora.org>

Current code clears debug registers after SOC global reset performed
in ath11k_pci_sw_reset. However at that time those registers are
not accessible due to reset, thus they are actually not cleared at all.
For WCN6855, it may cause target fail to initialize. This issue can be
fixed by moving clear action ahead.

In addition, on some specific platforms, need to add delay to wait
those registers to become accessible.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1

Signed-off-by: Baochen Qiang <bqiang@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/pci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 5abb38cc3b55..7b3bce0ba76e 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -430,6 +430,8 @@ static void ath11k_pci_force_wake(struct ath11k_base *ab)
 
 static void ath11k_pci_sw_reset(struct ath11k_base *ab, bool power_on)
 {
+	mdelay(100);
+
 	if (power_on) {
 		ath11k_pci_enable_ltssm(ab);
 		ath11k_pci_clear_all_intrs(ab);
@@ -439,9 +441,9 @@ static void ath11k_pci_sw_reset(struct ath11k_base *ab, bool power_on)
 	}
 
 	ath11k_mhi_clear_vector(ab);
+	ath11k_pci_clear_dbg_registers(ab);
 	ath11k_pci_soc_global_reset(ab);
 	ath11k_mhi_set_mhictrl_reset(ab);
-	ath11k_pci_clear_dbg_registers(ab);
 }
 
 int ath11k_pci_get_msi_irq(struct device *dev, unsigned int vector)
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Jouni Malinen <jouni@codeaurora.org>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org,
	Baochen Qiang <bqiang@codeaurora.org>,
	Jouni Malinen <jouni@codeaurora.org>
Subject: [PATCH 3/5] ath11k: Fix inaccessible debug registers
Date: Mon, 13 Sep 2021 21:02:44 +0300	[thread overview]
Message-ID: <20210913180246.193388-3-jouni@codeaurora.org> (raw)
In-Reply-To: <20210913180246.193388-1-jouni@codeaurora.org>

From: Baochen Qiang <bqiang@codeaurora.org>

Current code clears debug registers after SOC global reset performed
in ath11k_pci_sw_reset. However at that time those registers are
not accessible due to reset, thus they are actually not cleared at all.
For WCN6855, it may cause target fail to initialize. This issue can be
fixed by moving clear action ahead.

In addition, on some specific platforms, need to add delay to wait
those registers to become accessible.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1

Signed-off-by: Baochen Qiang <bqiang@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/pci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 5abb38cc3b55..7b3bce0ba76e 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -430,6 +430,8 @@ static void ath11k_pci_force_wake(struct ath11k_base *ab)
 
 static void ath11k_pci_sw_reset(struct ath11k_base *ab, bool power_on)
 {
+	mdelay(100);
+
 	if (power_on) {
 		ath11k_pci_enable_ltssm(ab);
 		ath11k_pci_clear_all_intrs(ab);
@@ -439,9 +441,9 @@ static void ath11k_pci_sw_reset(struct ath11k_base *ab, bool power_on)
 	}
 
 	ath11k_mhi_clear_vector(ab);
+	ath11k_pci_clear_dbg_registers(ab);
 	ath11k_pci_soc_global_reset(ab);
 	ath11k_mhi_set_mhictrl_reset(ab);
-	ath11k_pci_clear_dbg_registers(ab);
 }
 
 int ath11k_pci_get_msi_irq(struct device *dev, unsigned int vector)
-- 
2.25.1


-- 
ath11k mailing list
ath11k@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/ath11k

  parent reply	other threads:[~2021-09-13 18:03 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-13 18:02 [PATCH 1/5] ath11k: Change DMA_FROM_DEVICE to DMA_TO_DEVICE when map reinjected packets Jouni Malinen
2021-09-13 18:02 ` Jouni Malinen
2021-09-13 18:02 ` [PATCH 2/5] ath11k: Drop MSDU with length error in DP rx path Jouni Malinen
2021-09-13 18:02   ` Jouni Malinen
2021-09-28 13:34   ` Kalle Valo
2021-09-28 13:34   ` Kalle Valo
2021-09-13 18:02 ` Jouni Malinen [this message]
2021-09-13 18:02   ` [PATCH 3/5] ath11k: Fix inaccessible debug registers Jouni Malinen
2021-09-13 18:02 ` [PATCH 4/5] ath11k: Fix memory leak in ath11k_qmi_driver_event_work Jouni Malinen
2021-09-13 18:02   ` Jouni Malinen
2021-09-13 18:02 ` [PATCH 5/5] ath11k: Handle MSI enablement during rmmod and SSR Jouni Malinen
2021-09-13 18:02   ` Jouni Malinen
2021-10-11  6:47   ` Kalle Valo
2021-10-11  6:47     ` Kalle Valo
2021-10-11 15:11   ` Kalle Valo
2021-10-11 15:11     ` Kalle Valo
2021-09-13 22:38 ` [PATCH 1/5] ath11k: Change DMA_FROM_DEVICE to DMA_TO_DEVICE when map reinjected packets Peter Oh
2021-09-13 22:38   ` Peter Oh
2021-09-14 17:09 ` Kalle Valo
2021-09-14 17:09 ` Kalle Valo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210913180246.193388-3-jouni@codeaurora.org \
    --to=jouni@codeaurora.org \
    --cc=ath11k@lists.infradead.org \
    --cc=bqiang@codeaurora.org \
    --cc=kvalo@codeaurora.org \
    --cc=linux-wireless@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.