mac80211: brcmfmac: backport important changes from the 4.18

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 75 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/331-v4.18-0004-brcmfmac-add-debugfs-entry-for-reading-firmware-capa.patch b/package/kernel/mac80211/patches/331-v4.18-0004-brcmfmac-add-debugfs-entry-for-reading-firmware-capa.patch
new file mode 100644
index 0000000000..71ed06786d
--- /dev/null
+++ b/package/kernel/mac80211/patches/331-v4.18-0004-brcmfmac-add-debugfs-entry-for-reading-firmware-capa.patch
@@ -0,0 +1,75 @@
+From 88001968245c42c26416476bf0ef960442371605 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Mon, 14 May 2018 08:48:20 +0200
+Subject: [PATCH] brcmfmac: add debugfs entry for reading firmware capabilities
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This allows reading all capabilities as reported by a firmware. They are
+printed using native (raw) names, just like developers like it the most.
+It's how firmware reports support for various features, e.g. supported
+modes, supported standards, power saving details, max BSS-es.
+
+Access to all that info is useful for trying new firmwares, comparing
+them and debugging features AKA bugs.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ .../wireless/broadcom/brcm80211/brcmfmac/feature.c | 36 ++++++++++++++++++++++
+ 1 file changed, 36 insertions(+)
+
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
+@@ -138,6 +138,41 @@ static void brcmf_feat_firmware_capabili
+ 	}
+ }
+ 
++/**
++ * brcmf_feat_fwcap_debugfs_read() - expose firmware capabilities to debugfs.
++ *
++ * @seq: sequence for debugfs entry.
++ * @data: raw data pointer.
++ */
++static int brcmf_feat_fwcap_debugfs_read(struct seq_file *seq, void *data)
++{
++	struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
++	struct brcmf_if *ifp = brcmf_get_ifp(bus_if->drvr, 0);
++	char caps[MAX_CAPS_BUFFER_SIZE + 1] = { };
++	char *tmp;
++	int err;
++
++	err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
++	if (err) {
++		brcmf_err("could not get firmware cap (%d)\n", err);
++		return err;
++	}
++
++	/* Put every capability in a new line */
++	for (tmp = caps; *tmp; tmp++) {
++		if (*tmp == ' ')
++			*tmp = '\n';
++	}
++
++	/* Usually there is a space at the end of capabilities string */
++	seq_printf(seq, "%s", caps);
++	/* So make sure we don't print two line breaks */
++	if (tmp > caps && *(tmp - 1) != '\n')
++		seq_printf(seq, "\n");
++
++	return 0;
++}
++
+ void brcmf_feat_attach(struct brcmf_pub *drvr)
+ {
+ 	struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
+@@ -196,6 +231,7 @@ void brcmf_feat_attach(struct brcmf_pub
+ 	}
+ 
+ 	brcmf_debugfs_add_entry(drvr, "features", brcmf_feat_debugfs_read);
++	brcmf_debugfs_add_entry(drvr, "fwcap", brcmf_feat_fwcap_debugfs_read);
+ }
+ 
+ bool brcmf_feat_is_enabled(struct brcmf_if *ifp, enum brcmf_feat_id id)