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From: AngeloGioacchino Del Regno  <angelogioacchino.delregno@somainline.org>
To: elder@kernel.org
Cc: bjorn.andersson@linaro.org, agross@kernel.org,
	davem@davemloft.net, kuba@kernel.org,
	linux-arm-msm@vger.kernel.org, netdev@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	konrad.dybcio@somainline.org, marijn.suijten@somainline.org,
	phone-devel@vger.kernel.org,
	AngeloGioacchino Del Regno 
	<angelogioacchino.delregno@somainline.org>
Subject: [PATCH v1 4/7] net: ipa: gsi: Use right masks for GSI v1.0 channels hw param
Date: Thu, 11 Feb 2021 18:50:12 +0100
Message-ID: <20210211175015.200772-5-angelogioacchino.delregno@somainline.org> (raw)
In-Reply-To: <20210211175015.200772-1-angelogioacchino.delregno@somainline.org>

In GSI v1.0 the register GSI_HW_PARAM_2_OFFSET has different layout
so the number of channels and events per EE are, of course, laid out
in 8 bits each (0-7, 8-15 respectively).

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
---
 drivers/net/ipa/gsi.c     | 16 +++++++++++++---
 drivers/net/ipa/gsi_reg.h |  5 +++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index b5460cbb085c..3311ffe514c9 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -1790,7 +1790,7 @@ static void gsi_channel_teardown(struct gsi *gsi)
 int gsi_setup(struct gsi *gsi)
 {
 	struct device *dev = gsi->dev;
-	u32 val;
+	u32 val, mask;
 	int ret;
 
 	/* Here is where we first touch the GSI hardware */
@@ -1804,7 +1804,12 @@ int gsi_setup(struct gsi *gsi)
 
 	val = ioread32(gsi->virt + GSI_GSI_HW_PARAM_2_OFFSET);
 
-	gsi->channel_count = u32_get_bits(val, NUM_CH_PER_EE_FMASK);
+	if (gsi->version == IPA_VERSION_3_1)
+		mask = GSIV1_NUM_CH_PER_EE_FMASK;
+	else
+		mask = NUM_CH_PER_EE_FMASK;
+
+	gsi->channel_count = u32_get_bits(val, mask);
 	if (!gsi->channel_count) {
 		dev_err(dev, "GSI reports zero channels supported\n");
 		return -EINVAL;
@@ -1816,7 +1821,12 @@ int gsi_setup(struct gsi *gsi)
 		gsi->channel_count = GSI_CHANNEL_COUNT_MAX;
 	}
 
-	gsi->evt_ring_count = u32_get_bits(val, NUM_EV_PER_EE_FMASK);
+	if (gsi->version == IPA_VERSION_3_1)
+		mask = GSIV1_NUM_EV_PER_EE_FMASK;
+	else
+		mask = NUM_EV_PER_EE_FMASK;
+
+	gsi->evt_ring_count = u32_get_bits(val, mask);
 	if (!gsi->evt_ring_count) {
 		dev_err(dev, "GSI reports zero event rings supported\n");
 		return -EINVAL;
diff --git a/drivers/net/ipa/gsi_reg.h b/drivers/net/ipa/gsi_reg.h
index 0e138bbd8205..4ba579fa21c2 100644
--- a/drivers/net/ipa/gsi_reg.h
+++ b/drivers/net/ipa/gsi_reg.h
@@ -287,6 +287,11 @@ enum gsi_generic_cmd_opcode {
 			GSI_EE_N_GSI_HW_PARAM_2_OFFSET(GSI_EE_AP)
 #define GSI_EE_N_GSI_HW_PARAM_2_OFFSET(ee) \
 			(0x0001f040 + 0x4000 * (ee))
+
+/* Fields below are present for IPA v3.1 with GSI version 1 */
+#define GSIV1_NUM_EV_PER_EE_FMASK	GENMASK(8, 0)
+#define GSIV1_NUM_CH_PER_EE_FMASK	GENMASK(15, 8)
+/* Fields below are present for IPA v3.5.1 and above */
 #define IRAM_SIZE_FMASK			GENMASK(2, 0)
 #define NUM_CH_PER_EE_FMASK		GENMASK(7, 3)
 #define NUM_EV_PER_EE_FMASK		GENMASK(12, 8)
-- 
2.30.0


  parent reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-11 17:50 [PATCH v1 0/7] Add support for IPA v3.1, GSI v1.0, MSM8998 IPA AngeloGioacchino Del Regno
2021-02-11 17:50 ` [PATCH v1 1/7] net: ipa: Add support for IPA v3.1 with GSI v1.0 AngeloGioacchino Del Regno
2021-02-12 18:49   ` Jakub Kicinski
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 2/7] net: ipa: endpoint: Don't read unexistant register on IPAv3.1 AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 3/7] net: ipa: gsi: Avoid some writes during irq setup for older IPA AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` AngeloGioacchino Del Regno [this message]
2021-03-02  2:05   ` [PATCH v1 4/7] net: ipa: gsi: Use right masks for GSI v1.0 channels hw param Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 5/7] net: ipa: Add support for IPA on MSM8998 AngeloGioacchino Del Regno
2021-02-12 18:50   ` Jakub Kicinski
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 6/7] dt-bindings: net: qcom-ipa: Document qcom,sc7180-ipa compatible AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-03-05 19:32   ` Rob Herring
2021-05-05 22:43   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 7/7] dt-bindings: net: qcom-ipa: Document qcom,msm8998-ipa compatible AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-03-05 19:33   ` Rob Herring
2021-05-05 22:43   ` Alex Elder
2021-02-11 20:27 ` [PATCH v1 0/7] Add support for IPA v3.1, GSI v1.0, MSM8998 IPA Alex Elder
2021-02-11 21:51   ` AngeloGioacchino Del Regno
2021-03-02  2:04 ` Alex Elder
2021-05-05 22:42 ` Alex Elder

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