[PATCH 2/4] brcmfmac: get RAM info right before downloading PCIe firmware

["Rafał Miłecki" <zajec5@gmail.com>]

From: Rafał Miłecki <rafal@milecki.pl>

It's important as brcmf_chip_get_raminfo() also makes sure that memory
is properly setup. Without it the firmware could report invalid RAM
address like 0x04000001.

During a normal brcmfmac lifetime brcmf_chip_get_raminfo() is called on
probe by the brcmf_chip_recognition(). This change allows implementing
further improvements like handling errors by resetting a device with
the brcmf_pcie_reset_device() and redownloading a firmware afterwards.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c | 6 ++++--
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.h | 1 +
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 6 ++++++
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
index 22534bf2a90c..fcaf19165891 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
@@ -707,8 +707,10 @@ static u32 brcmf_chip_tcm_rambase(struct brcmf_chip_priv *ci)
 	return 0;
 }
 
-static int brcmf_chip_get_raminfo(struct brcmf_chip_priv *ci)
+int brcmf_chip_get_raminfo(struct brcmf_chip *pub)
 {
+	struct brcmf_chip_priv *ci = container_of(pub, struct brcmf_chip_priv,
+						  pub);
 	struct brcmf_core_priv *mem_core;
 	struct brcmf_core *mem;
 
@@ -990,7 +992,7 @@ static int brcmf_chip_recognition(struct brcmf_chip_priv *ci)
 		brcmf_chip_set_passive(&ci->pub);
 	}
 
-	return brcmf_chip_get_raminfo(ci);
+	return brcmf_chip_get_raminfo(&ci->pub);
 }
 
 static void brcmf_chip_disable_arm(struct brcmf_chip_priv *chip, u16 id)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.h
index 0ae3b33bab62..4794cf38b4d3 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.h
@@ -80,6 +80,7 @@ struct brcmf_buscore_ops {
 	void (*activate)(void *ctx, struct brcmf_chip *chip, u32 rstvec);
 };
 
+int brcmf_chip_get_raminfo(struct brcmf_chip *pub);
 struct brcmf_chip *brcmf_chip_attach(void *ctx,
 				     const struct brcmf_buscore_ops *ops);
 void brcmf_chip_detach(struct brcmf_chip *chip);
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index 58a6bc379358..39f6421885f6 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -1727,6 +1727,12 @@ static void brcmf_pcie_setup(struct device *dev, int ret,
 	nvram_len = fwreq->items[BRCMF_PCIE_FW_NVRAM].nv_data.len;
 	kfree(fwreq);
 
+	ret = brcmf_chip_get_raminfo(devinfo->ci);
+	if (ret) {
+		brcmf_err(bus, "Failed to get RAM info\n");
+		goto fail;
+	}
+
 	/* Some of the firmwares have the size of the memory of the device
 	 * defined inside the firmware. This is because part of the memory in
 	 * the device is shared and the devision is determined by FW. Parse
-- 
2.20.1