drivers: llcc: Add LLCC driver for Lahaina

Add Last Level Cache Controller (LLCC) driver for Lahaina platform.

Change-Id: I4217c96287059a2621dc17c749381d5db16220d0
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>

drivers/soc/qcom/Kconfig

@@ -50,6 +50,15 @@ config QCOM_LLCC
 	  to clients that use the LLCC. Say yes here to enable LLCC slice
 	  driver.
 
+config QCOM_LAHAINA_LLCC
+	tristate "Qualcomm Technologies, Inc. LAHAINA LLCC driver"
+	depends on QCOM_LLCC
+	help
+	  Say y or m here to enable the LLCC driver for Lahaina platform.
+	  This provides data required to configure LLCC so that clients
+	  can start using the LLCC slices.
+	  If unsure, say n.
+
 config QCOM_SDM845_LLCC
 	tristate "Qualcomm Technologies, Inc. SDM845 LLCC driver"
 	depends on QCOM_LLCC

drivers/soc/qcom/Makefile

@@ -22,6 +22,7 @@ obj-$(CONFIG_QCOM_SECURE_CHAN_MANAGER) += scm.o
 obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o
 obj-$(CONFIG_QCOM_APR) += apr.o
 obj-$(CONFIG_QCOM_LLCC) += llcc-slice.o
+obj-$(CONFIG_QCOM_LAHAINA_LLCC) += llcc-lahaina.o
 obj-$(CONFIG_QCOM_SDM845_LLCC) += llcc-sdm845.o
 obj-$(CONFIG_QCOM_RPMHPD) += rpmhpd.o
 obj-$(CONFIG_QCOM_RPMPD) += rpmpd.o

drivers/soc/qcom/llcc-lahaina.c

@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2019, The Linux Foundation. All rights reserved.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/soc/qcom/llcc-qcom.h>
+
+/*
+ * SCT entry contains of the following parameters
+ * uid: Unique id for the client's use case
+ * slice_id: llcc slice id for each client
+ * max_cap: The maximum capacity of the cache slice provided in KB
+ * priority: Priority of the client used to select victim line for replacement
+ * fixed_size: Determine of the slice has a fixed capacity
+ * bonus_ways: Bonus ways to be used by any slice, bonus way is used only if
+ *             it't not a reserved way.
+ * res_ways: Reserved ways for the cache slice, the reserved ways cannot be used
+ *           by any other client than the one its assigned to.
+ * cache_mode: Each slice operates as a cache, this controls the mode of the
+ *             slice normal or TCM
+ * probe_target_ways: Determines what ways to probe for access hit. When
+ *                    configured to 1 only bonus and reserved ways are probed.
+ *                    when configured to 0 all ways in llcc are probed.
+ * dis_cap_alloc: Disable capacity based allocation for a client
+ * write_scid_en: Bit enables write cache support for a given scid.
+ * retain_on_pc: If this bit is set and client has maitained active vote
+ *               then the ways assigned to this client are not flushed on power
+ *               collapse.
+ * activate_on_init: Activate the slice immidiately after the SCT is programmed
+ */
+#define SCT_ENTRY(uid, sid, mc, p, fs, bway, rway, cmod, ptw, dca, wse, rp, a) \
+	{					\
+		.usecase_id = uid,		\
+		.slice_id = sid,		\
+		.max_cap = mc,			\
+		.priority = p,			\
+		.fixed_size = fs,		\
+		.bonus_ways = bway,		\
+		.res_ways = rway,		\
+		.cache_mode = cmod,		\
+		.probe_target_ways = ptw,	\
+		.dis_cap_alloc = dca,		\
+		.write_scid_en = wse,		\
+		.retain_on_pc = rp,		\
+		.activate_on_init = a,		\
+	}
+
+static struct llcc_slice_config lahaina_data[] =  {
+	SCT_ENTRY(LLCC_CPUSS,    1, 3072, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 1),
+	SCT_ENTRY(LLCC_VIDSC0,   2, 512, 3, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_AUDIO,    6, 1024, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 0, 0),
+	SCT_ENTRY(LLCC_MDMHPGRW, 7, 1024, 3, 0, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_MDM,      8, 3072, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_MDMHW,    9, 1024, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_CMPT,     10, 3072, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 0, 0),
+	SCT_ENTRY(LLCC_GPUHTW,   11, 1024, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_GPU,      12, 1024, 1, 0, 0xFFF, 0x0, 0, 0, 0, 1, 1, 0),
+	SCT_ENTRY(LLCC_MMUHWT,   13, 1024, 1, 1, 0x0,  0x0, 0, 0, 0, 0, 0, 1),
+	SCT_ENTRY(LLCC_CMPTDMA,  15, 1024, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_DISP,     16, 3072, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_MDMPNG,   21, 1024, 0, 1, 0xF,  0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_AUDHW,    22, 1024, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_CVP,      28, 512, 3, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_MDMVPE,   29, 256, 1, 1, 0xF,  0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_APTCM,    30, 1024, 3, 1, 0x0,  0x1, 1, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_WRTCH,    31, 512, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 0, 1),
+	SCT_ENTRY(LLCC_CVPFW,    17, 512, 1, 0, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+	SCT_ENTRY(LLCC_CPUSS1,   3, 1024, 1, 1, 0xFFF, 0x0, 0, 0, 0, 0, 1, 0),
+};
+
+static int lahaina_qcom_llcc_probe(struct platform_device *pdev)
+{
+	return qcom_llcc_probe(pdev, lahaina_data,
+				 ARRAY_SIZE(lahaina_data));
+}
+
+static const struct of_device_id lahaina_qcom_llcc_of_match[] = {
+	{ .compatible = "qcom,lahaina-llcc" },
+	{ },
+};
+
+static struct platform_driver lahaina_qcom_llcc_driver = {
+	.driver = {
+		.name = "lahaina-llcc",
+		.of_match_table = lahaina_qcom_llcc_of_match,
+	},
+	.probe = lahaina_qcom_llcc_probe,
+};
+module_platform_driver(lahaina_qcom_llcc_driver);
+
+MODULE_DESCRIPTION("QCOM lahaina LLCC driver");
+MODULE_LICENSE("GPL v2");