diff mbox series

[06/11] ath11k: add static window support for register access

Message ID 1612946530-28504-7-git-send-email-akolli@codeaurora.org
State New
Headers show
Series None | expand

Commit Message

Anilkumar Kolli Feb. 10, 2021, 8:42 a.m. UTC 
From: Karthikeyan Periyasamy <periyasa@codeaurora.org>

Three window slots can be configure. First window slot
dedicate for dynamic selection and remaining two slots
dedicate for static selection. To optimise the window
selection, frequent registers (UMAC, CE) are configure
in static window slot. so that we minimise the window
selection. Other registers are configure in dynamic window
slot. Get the window start address from the respective
offset and access the read/write register.

Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1.r2-00012-QCAHKSWPL_SILICONZ-1

Signed-off-by: Karthikeyan Periyasamy <periyasa@codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/core.h |  1 +
 drivers/net/wireless/ath/ath11k/hal.h  |  4 ++
 drivers/net/wireless/ath/ath11k/pci.c  | 72 +++++++++++++++++++++++++++++-----
 3 files changed, 68 insertions(+), 9 deletions(-)

Comments

Kalle Valo Feb. 16, 2021, 4:45 p.m. UTC | #1 
Anilkumar Kolli <akolli@codeaurora.org> writes:

> From: Karthikeyan Periyasamy <periyasa@codeaurora.org>

>

> Three window slots can be configure. First window slot

> dedicate for dynamic selection and remaining two slots

> dedicate for static selection. To optimise the window

> selection, frequent registers (UMAC, CE) are configure

> in static window slot. so that we minimise the window

> selection. Other registers are configure in dynamic window

> slot. Get the window start address from the respective

> offset and access the read/write register.

>

> Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1.r2-00012-QCAHKSWPL_SILICONZ-1

>

> Signed-off-by: Karthikeyan Periyasamy <periyasa@codeaurora.org>


Patches 6-10 are missing Anil's s-o-b. Anil, can I add them? If you
agree, please reply to this mail and include your s-o-b in the reply.

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
Anilkumar Kolli Feb. 17, 2021, 2:28 a.m. UTC | #2 
On 2021-02-16 22:15, Kalle Valo wrote:
> Anilkumar Kolli <akolli@codeaurora.org> writes:

> 

>> From: Karthikeyan Periyasamy <periyasa@codeaurora.org>

>> 

>> Three window slots can be configure. First window slot

>> dedicate for dynamic selection and remaining two slots

>> dedicate for static selection. To optimise the window

>> selection, frequent registers (UMAC, CE) are configure

>> in static window slot. so that we minimise the window

>> selection. Other registers are configure in dynamic window

>> slot. Get the window start address from the respective

>> offset and access the read/write register.

>> 

>> Tested-on: QCN9074 hw1.0 PCI 

>> WLAN.HK.2.4.0.1.r2-00012-QCAHKSWPL_SILICONZ-1

>> 

>> Signed-off-by: Karthikeyan Periyasamy <periyasa@codeaurora.org>

> 

> Patches 6-10 are missing Anil's s-o-b. Anil, can I add them? If you

> agree, please reply to this mail and include your s-o-b in the reply.


Sure Kalle, please add my s-o-b.
Signed-off-by: Anilkumar Kolli <akolli@codeaurora.org>


Thanks
Anil
Kalle Valo Feb. 17, 2021, 9:28 a.m. UTC | #3 
akolli@codeaurora.org writes:

> On 2021-02-16 22:15, Kalle Valo wrote:

>> Anilkumar Kolli <akolli@codeaurora.org> writes:

>>

>>> From: Karthikeyan Periyasamy <periyasa@codeaurora.org>

>>>

>>> Three window slots can be configure. First window slot

>>> dedicate for dynamic selection and remaining two slots

>>> dedicate for static selection. To optimise the window

>>> selection, frequent registers (UMAC, CE) are configure

>>> in static window slot. so that we minimise the window

>>> selection. Other registers are configure in dynamic window

>>> slot. Get the window start address from the respective

>>> offset and access the read/write register.

>>>

>>> Tested-on: QCN9074 hw1.0 PCI

>>> WLAN.HK.2.4.0.1.r2-00012-QCAHKSWPL_SILICONZ-1

>>>

>>> Signed-off-by: Karthikeyan Periyasamy <periyasa@codeaurora.org>

>>

>> Patches 6-10 are missing Anil's s-o-b. Anil, can I add them? If you

>> agree, please reply to this mail and include your s-o-b in the reply.

>

> Sure Kalle, please add my s-o-b.

> Signed-off-by: Anilkumar Kolli <akolli@codeaurora.org>


Thanks, added them now.

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
Issam Hamdi March 28, 2022, 4:44 p.m. UTC | #4 
Hello,

I was trying to read values of timers from some offsets on the QCN9074, 
but I get every time an invalid values (0xffffffff):
This is example of my code:

#define QCN9000_WLAON_GLOBAL_COUNTER_CTRL3      0x1F80118
#define QCN9000_WLAON_GLOBAL_COUNTER_CTRL4      0x1F8011C
#define QCN9000_WLAON_GLOBAL_COUNTER_CTRL5      0x1F80120

#define QCN9000_TIME_SYNC_ENABLE                0x80000000
#define QCN9000_TIME_SYNC_CLEAR                 0x0
.
.
.
ath11k_pci_write32(ab, QCN9000_WLAON_GLOBAL_COUNTER_CTRL5, 
QCN9000_TIME_SYNC_CLEAR);
ath11k_pci_write32(ab, QCN9000_WLAON_GLOBAL_COUNTER_CTRL5, 
QCN9000_TIME_SYNC_ENABLE);
low = ath11k_pci_read32(ab, QCN9000_WLAON_GLOBAL_COUNTER_CTRL3);
high = ath11k_pci_read32(ab, QCN9000_WLAON_GLOBAL_COUNTER_CTRL4);
.
.

The low and the high parameters always equal to "0xffffffff".

When I made some debugging. I found that the issue is related to 
"static_window_map" developed in the commit 
"480a73610c95511e42fb7d0359b523f66883e51a: ath11k: add static window 
support for register access" and enabled for QCN9074 in this commit 
"4e80946197a83a6115e308334618449b77696d6a: ath11k: add qcn9074 pci 
device support".
When I disabled the "static_window_map" 
(ab->bus_params.static_window_map = false;) for QCN9074, in that case I 
was able to get the correct values.
So it seems that there's an issue of reading some reg when 
static_window_map is enabled.
I need your help to solve this issue.

Regards,
Issam
Karthikeyan Periyasamy June 23, 2022, 10:44 a.m. UTC | #5 
Hi Hamdi Issam,

Timer values are falls under the first window slot (dynamic window selection). It is equivalent to the “static map false” case only.
It should work since you agreed that it is working when disabled “static_window_map” in hw params.

Based on the analysis in the base patch “[PATCH 06/11] ath11k: add static window support for register access”, it should work. Latest code is modified on the pci_read/write code flow.
Are you facing issue in the latest code base ?

Thanks,
Karthikeyan

> -----Original Message-----
> From: Hamdi Issam <ih@simonwunderlich.de>
> Sent: Monday, March 28, 2022 10:14 PM
> To: akolli@codeaurora.org
> Cc: ath11k@lists.infradead.org; linux-wireless@vger.kernel.org;
> periyasa@codeaurora.org
> Subject: Re: [PATCH 06/11] ath11k: add static window support for register
> access
> 
> WARNING: This email originated from outside of Qualcomm. Please be wary
> of any links or attachments, and do not enable macros.
> 
> Hello,
> 
> I was trying to read values of timers from some offsets on the QCN9074, but I
> get every time an invalid values (0xffffffff):
> This is example of my code:
> 
> #define QCN9000_WLAON_GLOBAL_COUNTER_CTRL3      0x1F80118
> #define QCN9000_WLAON_GLOBAL_COUNTER_CTRL4      0x1F8011C
> #define QCN9000_WLAON_GLOBAL_COUNTER_CTRL5      0x1F80120
> 
> #define QCN9000_TIME_SYNC_ENABLE                0x80000000
> #define QCN9000_TIME_SYNC_CLEAR                 0x0
> .
> .
> .
> ath11k_pci_write32(ab, QCN9000_WLAON_GLOBAL_COUNTER_CTRL5,
> QCN9000_TIME_SYNC_CLEAR);
> ath11k_pci_write32(ab, QCN9000_WLAON_GLOBAL_COUNTER_CTRL5,
> QCN9000_TIME_SYNC_ENABLE);
> low = ath11k_pci_read32(ab, QCN9000_WLAON_GLOBAL_COUNTER_CTRL3);
> high = ath11k_pci_read32(ab,
> QCN9000_WLAON_GLOBAL_COUNTER_CTRL4);
> .
> .
> 
> The low and the high parameters always equal to "0xffffffff".
> 
> When I made some debugging. I found that the issue is related to
> "static_window_map" developed in the commit
> "480a73610c95511e42fb7d0359b523f66883e51a: ath11k: add static window
> support for register access" and enabled for QCN9074 in this commit
> "4e80946197a83a6115e308334618449b77696d6a: ath11k: add qcn9074 pci
> device support".
> When I disabled the "static_window_map"
> (ab->bus_params.static_window_map = false;) for QCN9074, in that case I
> was able to get the correct values.
> So it seems that there's an issue of reading some reg when
> static_window_map is enabled.
> I need your help to solve this issue.
> 
> Regards,
> Issam
diff mbox series

Patch

diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 9a8fb23577b0..912294f7657c 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -608,6 +608,7 @@  struct ath11k_bus_params {
 	bool m3_fw_support;
 	bool fixed_bdf_addr;
 	bool fixed_mem_region;
+	bool static_window_map;
 };
 
 /* IPQ8074 HW channel counters frequency value in hertz */
diff --git a/drivers/net/wireless/ath/ath11k/hal.h b/drivers/net/wireless/ath/ath11k/hal.h
index 1f1b29cd0aa3..3f5687ebe1fc 100644
--- a/drivers/net/wireless/ath/ath11k/hal.h
+++ b/drivers/net/wireless/ath/ath11k/hal.h
@@ -39,6 +39,7 @@  struct ath11k_base;
 #define HAL_SHADOW_REG(x) (HAL_SHADOW_BASE_ADDR + (4 * (x)))
 
 /* WCSS Relative address */
+#define HAL_SEQ_WCSS_UMAC_OFFSET		0x00a00000
 #define HAL_SEQ_WCSS_UMAC_REO_REG		0x00a38000
 #define HAL_SEQ_WCSS_UMAC_TCL_REG		0x00a44000
 #define HAL_SEQ_WCSS_UMAC_CE0_SRC_REG		0x00a00000
@@ -47,6 +48,9 @@  struct ath11k_base;
 #define HAL_SEQ_WCSS_UMAC_CE1_DST_REG		0x00a03000
 #define HAL_SEQ_WCSS_UMAC_WBM_REG		0x00a34000
 
+#define HAL_CE_WFSS_CE_REG_BASE			0x01b80000
+#define HAL_WLAON_REG_BASE			0x01f80000
+
 /* SW2TCL(x) R0 ring configuration address */
 #define HAL_TCL1_RING_CMN_CTRL_REG		0x00000014
 #define HAL_TCL1_RING_DSCP_TID_MAP		0x0000002c
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 5edcb1ef9523..f112ebd9d98b 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -133,9 +133,38 @@  static inline void ath11k_pci_select_window(struct ath11k_pci *ab_pci, u32 offse
 	}
 }
 
+static inline void ath11k_pci_select_static_window(struct ath11k_pci *ab_pci)
+{
+	u32 umac_window = FIELD_GET(WINDOW_VALUE_MASK, HAL_SEQ_WCSS_UMAC_OFFSET);
+	u32 ce_window = FIELD_GET(WINDOW_VALUE_MASK, HAL_CE_WFSS_CE_REG_BASE);
+	u32 window;
+
+	window = (umac_window << 12) | (ce_window << 6);
+
+	iowrite32(WINDOW_ENABLE_BIT | window, ab_pci->ab->mem + WINDOW_REG_ADDRESS);
+}
+
+static inline u32 ath11k_pci_get_window_start(struct ath11k_base *ab,
+					      u32 offset)
+{
+	u32 window_start;
+
+	/* If offset lies within DP register range, use 3rd window */
+	if ((offset ^ HAL_SEQ_WCSS_UMAC_OFFSET) < WINDOW_RANGE_MASK)
+		window_start = 3 * WINDOW_START;
+	/* If offset lies within CE register range, use 2nd window */
+	else if ((offset ^ HAL_CE_WFSS_CE_REG_BASE) < WINDOW_RANGE_MASK)
+		window_start = 2 * WINDOW_START;
+	else
+		window_start = WINDOW_START;
+
+	return window_start;
+}
+
 void ath11k_pci_write32(struct ath11k_base *ab, u32 offset, u32 value)
 {
 	struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
+	u32 window_start;
 
 	/* for offset beyond BAR + 4K - 32, may
 	 * need to wakeup MHI to access.
@@ -147,10 +176,21 @@  void ath11k_pci_write32(struct ath11k_base *ab, u32 offset, u32 value)
 	if (offset < WINDOW_START) {
 		iowrite32(value, ab->mem  + offset);
 	} else {
-		spin_lock_bh(&ab_pci->window_lock);
-		ath11k_pci_select_window(ab_pci, offset);
-		iowrite32(value, ab->mem + WINDOW_START + (offset & WINDOW_RANGE_MASK));
-		spin_unlock_bh(&ab_pci->window_lock);
+		if (ab->bus_params.static_window_map)
+			window_start = ath11k_pci_get_window_start(ab, offset);
+		else
+			window_start = WINDOW_START;
+
+		if (window_start == WINDOW_START) {
+			spin_lock_bh(&ab_pci->window_lock);
+			ath11k_pci_select_window(ab_pci, offset);
+			iowrite32(value, ab->mem + window_start +
+				  (offset & WINDOW_RANGE_MASK));
+			spin_unlock_bh(&ab_pci->window_lock);
+		} else {
+			iowrite32(value, ab->mem + window_start +
+				  (offset & WINDOW_RANGE_MASK));
+		}
 	}
 
 	if (test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
@@ -161,7 +201,7 @@  void ath11k_pci_write32(struct ath11k_base *ab, u32 offset, u32 value)
 u32 ath11k_pci_read32(struct ath11k_base *ab, u32 offset)
 {
 	struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
-	u32 val;
+	u32 val, window_start;
 
 	/* for offset beyond BAR + 4K - 32, may
 	 * need to wakeup MHI to access.
@@ -173,10 +213,21 @@  u32 ath11k_pci_read32(struct ath11k_base *ab, u32 offset)
 	if (offset < WINDOW_START) {
 		val = ioread32(ab->mem + offset);
 	} else {
-		spin_lock_bh(&ab_pci->window_lock);
-		ath11k_pci_select_window(ab_pci, offset);
-		val = ioread32(ab->mem + WINDOW_START + (offset & WINDOW_RANGE_MASK));
-		spin_unlock_bh(&ab_pci->window_lock);
+		if (ab->bus_params.static_window_map)
+			window_start = ath11k_pci_get_window_start(ab, offset);
+		else
+			window_start = WINDOW_START;
+
+		if (window_start == WINDOW_START) {
+			spin_lock_bh(&ab_pci->window_lock);
+			ath11k_pci_select_window(ab_pci, offset);
+			val = ioread32(ab->mem + window_start +
+				       (offset & WINDOW_RANGE_MASK));
+			spin_unlock_bh(&ab_pci->window_lock);
+		} else {
+			val = ioread32(ab->mem + window_start +
+				       (offset & WINDOW_RANGE_MASK));
+		}
 	}
 
 	if (test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
@@ -936,6 +987,9 @@  static int ath11k_pci_power_up(struct ath11k_base *ab)
 		return ret;
 	}
 
+	if (ab->bus_params.static_window_map)
+		ath11k_pci_select_static_window(ab_pci);
+
 	return 0;
 }