mac80211: backport brcmfmac fixes & debugging helpers from 4.18

The most important is probably regression fix in handling platform
NVRAM. That bug stopped hardware from being properly calibrated breaking
e.g. 5 GHz for Netgear R8000.

Other than that it triggers memory dumps when experiencing firmware
problems which is important for debugging purposes.

Fixes: 2811c97803e5 ("mac80211: backport brcmfmac firmware & clm_blob loading rework")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit b26214adb53da2816ff830b6cd6e31e1dafa2635)

1 files changed, 41 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/337-v4.18-brcmfmac-fix-regression-in-parsing-NVRAM-for-multipl.patch b/package/kernel/mac80211/patches/337-v4.18-brcmfmac-fix-regression-in-parsing-NVRAM-for-multipl.patch
new file mode 100644
index 0000000000..2e265a2f37
--- /dev/null
+++ b/package/kernel/mac80211/patches/337-v4.18-brcmfmac-fix-regression-in-parsing-NVRAM-for-multipl.patch
@@ -0,0 +1,41 @@
+From 299b6365a3b7cf7f5ea1c945a420e9ee4841d6f7 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Sun, 22 Jul 2018 23:46:25 +0200
+Subject: [PATCH] brcmfmac: fix regression in parsing NVRAM for multiple
+ devices
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+NVRAM is designed to work with Broadcom's SDK Linux kernel which fakes
+PCI domain 0 for all internal MMIO devices. Since official Linux kernel
+uses platform devices for that purpose there is a mismatch in numbering
+PCI domains.
+
+There used to be a fix for that problem but it was accidentally dropped
+during the last firmware loading rework. That resulted in brcmfmac not
+being able to extract device specific NVRAM content and all kind of
+calibration problems.
+
+Reported-by: Aditya Xavier <adityaxavier@gmail.com>
+Fixes: 2baa3aaee27f ("brcmfmac: introduce brcmf_fw_alloc_request() function")
+Cc: stable@vger.kernel.org # v4.17+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+@@ -1785,7 +1785,8 @@ brcmf_pcie_prepare_fw_request(struct brc
+ 	fwreq->items[BRCMF_PCIE_FW_CODE].type = BRCMF_FW_TYPE_BINARY;
+ 	fwreq->items[BRCMF_PCIE_FW_NVRAM].type = BRCMF_FW_TYPE_NVRAM;
+ 	fwreq->items[BRCMF_PCIE_FW_NVRAM].flags = BRCMF_FW_REQF_OPTIONAL;
+-	fwreq->domain_nr = pci_domain_nr(devinfo->pdev->bus);
++	/* NVRAM reserves PCI domain 0 for Broadcom's SDK faked bus */
++	fwreq->domain_nr = pci_domain_nr(devinfo->pdev->bus) + 1;
+ 	fwreq->bus_nr = devinfo->pdev->bus->number;
+ 
+ 	return fwreq;