[PATCH 0/2] ath10k: load device specific board files

[PATCH 0/2] ath10k: load device specific board files

[Michal Kazior]

Until now it was okay to use a very generic board
data since OTP was supposed to fill in the blanks
(except some cases in which a complete cal data is
provided via cal-pci-xxx or device tree).

However since qca6174 this has changed. It is now
necessary to load specific board file for
different designs in driver. The OTP must still be
run.

Some devices with different subsystem
vendor/device ids may share the same board file.
Driver could maintain a subsystem vendor/device
id to design id however I prefer to just leave
this to userspace (e.g. symlinks). Thoughts?


Michal Kazior (2):
  ath10k: share board file loading code across FW APIs
  ath10k: allow loading device specific board files

 drivers/net/wireless/ath/ath10k/core.c  | 109 +++++++++++++++++++++-----------
 drivers/net/wireless/ath/ath10k/core.h  |   3 +
 drivers/net/wireless/ath/ath10k/debug.c |   6 +-
 drivers/net/wireless/ath/ath10k/pci.c   |   5 ++
 4 files changed, 84 insertions(+), 39 deletions(-)

-- 
2.1.4


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[PATCH 1/2] ath10k: share board file loading code across FW APIs

[Michal Kazior]

There's no need to implement the same thing twice.
Reduce code duplication.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
---
 drivers/net/wireless/ath/ath10k/core.c | 68 +++++++++++++++-------------------
 1 file changed, 30 insertions(+), 38 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index c0e454b..1785e0e 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -482,6 +482,30 @@ static int ath10k_fetch_cal_file(struct ath10k *ar)
 	return 0;
 }
 
+static int ath10k_core_fetch_board_file(struct ath10k *ar)
+{
+	int ret;
+
+	if (!ar->hw_params.fw.board) {
+		ath10k_err(ar, "failed to find board file fw entry\n");
+		return -EINVAL;
+	}
+
+	ar->board = ath10k_fetch_fw_file(ar,
+					 ar->hw_params.fw.dir,
+					 ar->hw_params.fw.board);
+	if (IS_ERR(ar->board)) {
+		ret = PTR_ERR(ar->board);
+		ath10k_err(ar, "failed to fetch board data: %d\n", ret);
+		return ret;
+	}
+
+	ar->board_data = ar->board->data;
+	ar->board_len = ar->board->size;
+
+	return 0;
+}
+
 static int ath10k_core_fetch_firmware_api_1(struct ath10k *ar)
 {
 	int ret = 0;
@@ -491,23 +515,6 @@ static int ath10k_core_fetch_firmware_api_1(struct ath10k *ar)
 		return -EINVAL;
 	}
 
-	if (ar->hw_params.fw.board == NULL) {
-		ath10k_err(ar, "board data file not defined");
-		return -EINVAL;
-	}
-
-	ar->board = ath10k_fetch_fw_file(ar,
-					 ar->hw_params.fw.dir,
-					 ar->hw_params.fw.board);
-	if (IS_ERR(ar->board)) {
-		ret = PTR_ERR(ar->board);
-		ath10k_err(ar, "could not fetch board data (%d)\n", ret);
-		goto err;
-	}
-
-	ar->board_data = ar->board->data;
-	ar->board_len = ar->board->size;
-
 	ar->firmware = ath10k_fetch_fw_file(ar,
 					    ar->hw_params.fw.dir,
 					    ar->hw_params.fw.fw);
@@ -695,27 +702,6 @@ static int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name)
 		goto err;
 	}
 
-	/* now fetch the board file */
-	if (ar->hw_params.fw.board == NULL) {
-		ath10k_err(ar, "board data file not defined");
-		ret = -EINVAL;
-		goto err;
-	}
-
-	ar->board = ath10k_fetch_fw_file(ar,
-					 ar->hw_params.fw.dir,
-					 ar->hw_params.fw.board);
-	if (IS_ERR(ar->board)) {
-		ret = PTR_ERR(ar->board);
-		ath10k_err(ar, "could not fetch board data '%s/%s' (%d)\n",
-			   ar->hw_params.fw.dir, ar->hw_params.fw.board,
-			   ret);
-		goto err;
-	}
-
-	ar->board_data = ar->board->data;
-	ar->board_len = ar->board->size;
-
 	return 0;
 
 err:
@@ -730,6 +716,12 @@ static int ath10k_core_fetch_firmware_files(struct ath10k *ar)
 	/* calibration file is optional, don't check for any errors */
 	ath10k_fetch_cal_file(ar);
 
+	ret = ath10k_core_fetch_board_file(ar);
+	if (ret) {
+		ath10k_err(ar, "failed to fetch board file: %d\n", ret);
+		return ret;
+	}
+
 	ar->fw_api = 4;
 	ath10k_dbg(ar, ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);
 
-- 
2.1.4


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Re: [PATCH 1/2] ath10k: share board file loading code across FW APIs

[Kalle Valo]

Michal Kazior <michal.kazior@tieto.com> writes:

> There's no need to implement the same thing twice.
> Reduce code duplication.
>
> Signed-off-by: Michal Kazior <michal.kazior@tieto.com>

[...]

> @@ -730,6 +716,12 @@ static int ath10k_core_fetch_firmware_files(struct ath10k *ar)
>  	/* calibration file is optional, don't check for any errors */
>  	ath10k_fetch_cal_file(ar);
>  
> +	ret = ath10k_core_fetch_board_file(ar);
> +	if (ret) {
> +		ath10k_err(ar, "failed to fetch board file: %d\n", ret);
> +		return ret;
> +	}
> +
>  	ar->fw_api = 4;
>  	ath10k_dbg(ar, ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);

There was a conflict here, please check the resolution in the pending
branch.

-- 
Kalle Valo

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Re: [PATCH 1/2] ath10k: share board file loading code across FW APIs

[Michal Kazior]

On 23 March 2015 at 17:01, Kalle Valo <kvalo@qca.qualcomm.com> wrote:
> Michal Kazior <michal.kazior@tieto.com> writes:
>
>> There's no need to implement the same thing twice.
>> Reduce code duplication.
>>
>> Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
>
> [...]
>
>> @@ -730,6 +716,12 @@ static int ath10k_core_fetch_firmware_files(struct ath10k *ar)
>>       /* calibration file is optional, don't check for any errors */
>>       ath10k_fetch_cal_file(ar);
>>
>> +     ret = ath10k_core_fetch_board_file(ar);
>> +     if (ret) {
>> +             ath10k_err(ar, "failed to fetch board file: %d\n", ret);
>> +             return ret;
>> +     }
>> +
>>       ar->fw_api = 4;
>>       ath10k_dbg(ar, ATH10K_DBG_BOOT, "trying fw api %d\n", ar->fw_api);
>
> There was a conflict here, please check the resolution in the pending
> branch.

Looks good, thanks!


Michał

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[PATCH 2/2] ath10k: allow loading device specific board files

[Michal Kazior]

Some devices differ slightly and require different
board files. These devices can be differentiated
by looking at PCI subsystem device id. That is the
case for qca6174 devices at least.

Use that and load subsystem id specific board
files if possible. Otherwise fall back to use the
(old) generic board file path.

Using wrong board data may cause device crashes or
invalid behaviour (wrong tx power, garbled RF
signal).

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
---
 drivers/net/wireless/ath/ath10k/core.c  | 55 ++++++++++++++++++++++++++++-----
 drivers/net/wireless/ath/ath10k/core.h  |  3 ++
 drivers/net/wireless/ath/ath10k/debug.c |  6 +++-
 drivers/net/wireless/ath/ath10k/pci.c   |  5 +++
 4 files changed, 61 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 1785e0e..12da7fa 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -482,10 +482,26 @@ static int ath10k_fetch_cal_file(struct ath10k *ar)
 	return 0;
 }
 
-static int ath10k_core_fetch_board_file(struct ath10k *ar)
+static int ath10k_core_fetch_spec_board_file(struct ath10k *ar)
 {
-	int ret;
+	char filename[100];
 
+	scnprintf(filename, sizeof(filename), "board-%s-%s.bin",
+		  ath10k_bus_str(ar->hif.bus), ar->spec_board_id);
+
+	ar->board = ath10k_fetch_fw_file(ar, ar->hw_params.fw.dir, filename);
+	if (IS_ERR(ar->board))
+		return PTR_ERR(ar->board);
+
+	ar->board_data = ar->board->data;
+	ar->board_len = ar->board->size;
+	ar->spec_board_loaded = true;
+
+	return 0;
+}
+
+static int ath10k_core_fetch_generic_board_file(struct ath10k *ar)
+{
 	if (!ar->hw_params.fw.board) {
 		ath10k_err(ar, "failed to find board file fw entry\n");
 		return -EINVAL;
@@ -494,14 +510,39 @@ static int ath10k_core_fetch_board_file(struct ath10k *ar)
 	ar->board = ath10k_fetch_fw_file(ar,
 					 ar->hw_params.fw.dir,
 					 ar->hw_params.fw.board);
-	if (IS_ERR(ar->board)) {
-		ret = PTR_ERR(ar->board);
-		ath10k_err(ar, "failed to fetch board data: %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(ar->board))
+		return PTR_ERR(ar->board);
 
 	ar->board_data = ar->board->data;
 	ar->board_len = ar->board->size;
+	ar->spec_board_loaded = false;
+
+	return 0;
+}
+
+static int ath10k_core_fetch_board_file(struct ath10k *ar)
+{
+	int ret;
+
+	if (strlen(ar->spec_board_id) > 0) {
+		ret = ath10k_core_fetch_spec_board_file(ar);
+		if (ret) {
+			ath10k_info(ar, "failed to load spec board file, falling back to generic: %d\n",
+				    ret);
+			goto generic;
+		}
+
+		ath10k_dbg(ar, ATH10K_DBG_BOOT, "found specific board file for %s\n",
+			   ar->spec_board_id);
+		return 0;
+	}
+
+generic:
+	ret = ath10k_core_fetch_generic_board_file(ar);
+	if (ret) {
+		ath10k_err(ar, "failed to fetch generic board data: %d\n", ret);
+		return ret;
+	}
 
 	return 0;
 }
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index c1f43b0..90b5b10 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -568,6 +568,9 @@ struct ath10k {
 
 	const struct firmware *cal_file;
 
+	char spec_board_id[100];
+	bool spec_board_loaded;
+
 	int fw_api;
 	enum ath10k_cal_mode cal_mode;
 
diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index 301081d..9c824e2 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -124,10 +124,14 @@ EXPORT_SYMBOL(ath10k_info);
 
 void ath10k_print_driver_info(struct ath10k *ar)
 {
-	ath10k_info(ar, "%s (0x%08x, 0x%08x) fw %s api %d htt %d.%d wmi %d cal %s max_sta %d\n",
+	ath10k_info(ar, "%s (0x%08x, 0x%08x%s%s%s) fw %s api %d htt %d.%d wmi %d cal %s max_sta %d\n",
 		    ar->hw_params.name,
 		    ar->target_version,
 		    ar->chip_id,
+		    (strlen(ar->spec_board_id) > 0 ? ", " : ""),
+		    ar->spec_board_id,
+		    (strlen(ar->spec_board_id) > 0 && !ar->spec_board_loaded
+		     ? " fallback" : ""),
 		    ar->hw->wiphy->fw_version,
 		    ar->fw_api,
 		    ar->htt.target_version_major,
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index b4aacfa..1e528bc 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -2627,6 +2627,11 @@ static int ath10k_pci_probe(struct pci_dev *pdev,
 	ar_pci->dev = &pdev->dev;
 	ar_pci->ar = ar;
 
+	if (pdev->subsystem_vendor || pdev->subsystem_device)
+		scnprintf(ar->spec_board_id, sizeof(ar->spec_board_id),
+			  "0x%04x:0x%04x",
+			  pdev->subsystem_vendor, pdev->subsystem_device);
+
 	spin_lock_init(&ar_pci->ce_lock);
 	setup_timer(&ar_pci->rx_post_retry, ath10k_pci_rx_replenish_retry,
 		    (unsigned long)ar);
-- 
2.1.4


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