linux-kernel - [PATCH v2 22/35] brcmfmac: chip: Handle 1024-unit sizes for TCM blocks

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Message-Id: <20220104072658.69756-23-marcan@marcan.st>
Date:   Tue,  4 Jan 2022 16:26:45 +0900
From:   Hector Martin <marcan@...can.st>
To:     Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Chi-hsien Lin <chi-hsien.lin@...ineon.com>,
        Wright Feng <wright.feng@...ineon.com>,
        Dmitry Osipenko <digetx@...il.com>
Cc:     Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Mark Kettenis <kettenis@...nbsd.org>,
        Rafał Miłecki <zajec5@...il.com>,
        Pieter-Paul Giesberts <pieter-paul.giesberts@...adcom.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        "John W. Linville" <linville@...driver.com>,
        "brian m. carlson" <sandals@...stytoothpaste.net>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com
Subject: [PATCH v2 22/35] brcmfmac: chip: Handle 1024-unit sizes for TCM blocks

BCM4387 has trailing odd-sized blocks as part of TCM which have
their size described as a multiple of 1024 instead of 8192. Handle this
so we can compute the TCM size properly.

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Hector Martin <marcan@...can.st>
---
 .../wireless/broadcom/brcm80211/brcmfmac/chip.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
index 713546cebd5a..cfa93e3ef1a1 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
@@ -212,8 +212,8 @@ struct sbsocramregs {
 #define	ARMCR4_TCBANB_MASK	0xf
 #define	ARMCR4_TCBANB_SHIFT	0
 
-#define	ARMCR4_BSZ_MASK		0x3f
-#define	ARMCR4_BSZ_MULT		8192
+#define	ARMCR4_BSZ_MASK		0x7f
+#define	ARMCR4_BLK_1K_MASK	0x200
 
 struct brcmf_core_priv {
 	struct brcmf_core pub;
@@ -675,7 +675,8 @@ static u32 brcmf_chip_sysmem_ramsize(struct brcmf_core_priv *sysmem)
 }
 
 /** Return the TCM-RAM size of the ARMCR4 core. */
-static u32 brcmf_chip_tcm_ramsize(struct brcmf_core_priv *cr4)
+static u32 brcmf_chip_tcm_ramsize(struct brcmf_chip_priv *ci,
+				  struct brcmf_core_priv *cr4)
 {
 	u32 corecap;
 	u32 memsize = 0;
@@ -683,6 +684,7 @@ static u32 brcmf_chip_tcm_ramsize(struct brcmf_core_priv *cr4)
 	u32 nbb;
 	u32 totb;
 	u32 bxinfo;
+	u32 blksize;
 	u32 idx;
 
 	corecap = brcmf_chip_core_read32(cr4, ARMCR4_CAP);
@@ -694,7 +696,12 @@ static u32 brcmf_chip_tcm_ramsize(struct brcmf_core_priv *cr4)
 	for (idx = 0; idx < totb; idx++) {
 		brcmf_chip_core_write32(cr4, ARMCR4_BANKIDX, idx);
 		bxinfo = brcmf_chip_core_read32(cr4, ARMCR4_BANKINFO);
-		memsize += ((bxinfo & ARMCR4_BSZ_MASK) + 1) * ARMCR4_BSZ_MULT;
+		if (bxinfo & ARMCR4_BLK_1K_MASK)
+			blksize = 1024;
+		else
+			blksize = 8192;
+
+		memsize += ((bxinfo & ARMCR4_BSZ_MASK) + 1) * blksize;
 	}
 
 	return memsize;
@@ -752,7 +759,7 @@ int brcmf_chip_get_raminfo(struct brcmf_chip *pub)
 	mem = brcmf_chip_get_core(&ci->pub, BCMA_CORE_ARM_CR4);
 	if (mem) {
 		mem_core = container_of(mem, struct brcmf_core_priv, pub);
-		ci->pub.ramsize = brcmf_chip_tcm_ramsize(mem_core);
+		ci->pub.ramsize = brcmf_chip_tcm_ramsize(ci, mem_core);
 		ci->pub.rambase = brcmf_chip_tcm_rambase(ci);
 		if (ci->pub.rambase == INVALID_RAMBASE) {
 			brcmf_err("RAM base not provided with ARM CR4 core\n");
-- 
2.33.0