1 files changed, 0 insertions, 313 deletions
diff --git a/drivers/net/ipa/ipa_clock.c b/drivers/net/ipa/ipa_clock.c
deleted file mode 100644
index c5204fd58ac4..000000000000
--- a/drivers/net/ipa/ipa_clock.c
+++ /dev/null
@@ -1,313 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
- * Copyright (C) 2018-2020 Linaro Ltd.
- */
-
-#include <linux/atomic.h>
-#include <linux/mutex.h>
-#include <linux/clk.h>
-#include <linux/device.h>
-#include <linux/interconnect.h>
-
-#include "ipa.h"
-#include "ipa_clock.h"
-#include "ipa_modem.h"
-
-/**
- * DOC: IPA Clocking
- *
- * The "IPA Clock" manages both the IPA core clock and the interconnects
- * (buses) the IPA depends on as a single logical entity.  A reference count
- * is incremented by "get" operations and decremented by "put" operations.
- * Transitions of that count from 0 to 1 result in the clock and interconnects
- * being enabled, and transitions of the count from 1 to 0 cause them to be
- * disabled.  We currently operate the core clock at a fixed clock rate, and
- * all buses at a fixed average and peak bandwidth.  As more advanced IPA
- * features are enabled, we can make better use of clock and bus scaling.
- *
- * An IPA clock reference must be held for any access to IPA hardware.
- */
-
-#define	IPA_CORE_CLOCK_RATE		(75UL * 1000 * 1000)	/* Hz */
-
-/* Interconnect path bandwidths (each times 1000 bytes per second) */
-#define IPA_MEMORY_AVG			(80 * 1000)	/* 80 MBps */
-#define IPA_MEMORY_PEAK			(600 * 1000)
-
-#define IPA_IMEM_AVG			(80 * 1000)
-#define IPA_IMEM_PEAK			(350 * 1000)
-
-#define IPA_CONFIG_AVG			(40 * 1000)
-#define IPA_CONFIG_PEAK			(40 * 1000)
-
-/**
- * struct ipa_clock - IPA clocking information
- * @count:		Clocking reference count
- * @mutex;		Protects clock enable/disable
- * @core:		IPA core clock
- * @memory_path:	Memory interconnect
- * @imem_path:		Internal memory interconnect
- * @config_path:	Configuration space interconnect
- */
-struct ipa_clock {
-	atomic_t count;
-	struct mutex mutex; /* protects clock enable/disable */
-	struct clk *core;
-	struct icc_path *memory_path;
-	struct icc_path *imem_path;
-	struct icc_path *config_path;
-};
-
-static struct icc_path *
-ipa_interconnect_init_one(struct device *dev, const char *name)
-{
-	struct icc_path *path;
-
-	path = of_icc_get(dev, name);
-	if (IS_ERR(path))
-		dev_err(dev, "error %ld getting %s interconnect\n",
-			PTR_ERR(path), name);
-
-	return path;
-}
-
-/* Initialize interconnects required for IPA operation */
-static int ipa_interconnect_init(struct ipa_clock *clock, struct device *dev)
-{
-	struct icc_path *path;
-
-	path = ipa_interconnect_init_one(dev, "memory");
-	if (IS_ERR(path))
-		goto err_return;
-	clock->memory_path = path;
-
-	path = ipa_interconnect_init_one(dev, "imem");
-	if (IS_ERR(path))
-		goto err_memory_path_put;
-	clock->imem_path = path;
-
-	path = ipa_interconnect_init_one(dev, "config");
-	if (IS_ERR(path))
-		goto err_imem_path_put;
-	clock->config_path = path;
-
-	return 0;
-
-err_imem_path_put:
-	icc_put(clock->imem_path);
-err_memory_path_put:
-	icc_put(clock->memory_path);
-err_return:
-	return PTR_ERR(path);
-}
-
-/* Inverse of ipa_interconnect_init() */
-static void ipa_interconnect_exit(struct ipa_clock *clock)
-{
-	icc_put(clock->config_path);
-	icc_put(clock->imem_path);
-	icc_put(clock->memory_path);
-}
-
-/* Currently we only use one bandwidth level, so just "enable" interconnects */
-static int ipa_interconnect_enable(struct ipa *ipa)
-{
-	struct ipa_clock *clock = ipa->clock;
-	int ret;
-
-	ret = icc_set_bw(clock->memory_path, IPA_MEMORY_AVG, IPA_MEMORY_PEAK);
-	if (ret)
-		return ret;
-
-	ret = icc_set_bw(clock->imem_path, IPA_IMEM_AVG, IPA_IMEM_PEAK);
-	if (ret)
-		goto err_memory_path_disable;
-
-	ret = icc_set_bw(clock->config_path, IPA_CONFIG_AVG, IPA_CONFIG_PEAK);
-	if (ret)
-		goto err_imem_path_disable;
-
-	return 0;
-
-err_imem_path_disable:
-	(void)icc_set_bw(clock->imem_path, 0, 0);
-err_memory_path_disable:
-	(void)icc_set_bw(clock->memory_path, 0, 0);
-
-	return ret;
-}
-
-/* To disable an interconnect, we just its bandwidth to 0 */
-static int ipa_interconnect_disable(struct ipa *ipa)
-{
-	struct ipa_clock *clock = ipa->clock;
-	int ret;
-
-	ret = icc_set_bw(clock->memory_path, 0, 0);
-	if (ret)
-		return ret;
-
-	ret = icc_set_bw(clock->imem_path, 0, 0);
-	if (ret)
-		goto err_memory_path_reenable;
-
-	ret = icc_set_bw(clock->config_path, 0, 0);
-	if (ret)
-		goto err_imem_path_reenable;
-
-	return 0;
-
-err_imem_path_reenable:
-	(void)icc_set_bw(clock->imem_path, IPA_IMEM_AVG, IPA_IMEM_PEAK);
-err_memory_path_reenable:
-	(void)icc_set_bw(clock->memory_path, IPA_MEMORY_AVG, IPA_MEMORY_PEAK);
-
-	return ret;
-}
-
-/* Turn on IPA clocks, including interconnects */
-static int ipa_clock_enable(struct ipa *ipa)
-{
-	int ret;
-
-	ret = ipa_interconnect_enable(ipa);
-	if (ret)
-		return ret;
-
-	ret = clk_prepare_enable(ipa->clock->core);
-	if (ret)
-		ipa_interconnect_disable(ipa);
-
-	return ret;
-}
-
-/* Inverse of ipa_clock_enable() */
-static void ipa_clock_disable(struct ipa *ipa)
-{
-	clk_disable_unprepare(ipa->clock->core);
-	(void)ipa_interconnect_disable(ipa);
-}
-
-/* Get an IPA clock reference, but only if the reference count is
- * already non-zero.  Returns true if the additional reference was
- * added successfully, or false otherwise.
- */
-bool ipa_clock_get_additional(struct ipa *ipa)
-{
-	return !!atomic_inc_not_zero(&ipa->clock->count);
-}
-
-/* Get an IPA clock reference.  If the reference count is non-zero, it is
- * incremented and return is immediate.  Otherwise it is checked again
- * under protection of the mutex, and if appropriate the clock (and
- * interconnects) are enabled suspended endpoints (if any) are resumed
- * before returning.
- *
- * Incrementing the reference count is intentionally deferred until
- * after the clock is running and endpoints are resumed.
- */
-void ipa_clock_get(struct ipa *ipa)
-{
-	struct ipa_clock *clock = ipa->clock;
-	int ret;
-
-	/* If the clock is running, just bump the reference count */
-	if (ipa_clock_get_additional(ipa))
-		return;
-
-	/* Otherwise get the mutex and check again */
-	mutex_lock(&clock->mutex);
-
-	/* A reference might have been added before we got the mutex. */
-	if (ipa_clock_get_additional(ipa))
-		goto out_mutex_unlock;
-
-	ret = ipa_clock_enable(ipa);
-	if (ret) {
-		dev_err(&ipa->pdev->dev, "error %d enabling IPA clock\n", ret);
-		goto out_mutex_unlock;
-	}
-
-	ipa_endpoint_resume(ipa);
-
-	atomic_inc(&clock->count);
-
-out_mutex_unlock:
-	mutex_unlock(&clock->mutex);
-}
-
-/* Attempt to remove an IPA clock reference.  If this represents the last
- * reference, suspend endpoints and disable the clock (and interconnects)
- * under protection of a mutex.
- */
-void ipa_clock_put(struct ipa *ipa)
-{
-	struct ipa_clock *clock = ipa->clock;
-
-	/* If this is not the last reference there's nothing more to do */
-	if (!atomic_dec_and_mutex_lock(&clock->count, &clock->mutex))
-		return;
-
-	ipa_endpoint_suspend(ipa);
-
-	ipa_clock_disable(ipa);
-
-	mutex_unlock(&clock->mutex);
-}
-
-/* Initialize IPA clocking */
-struct ipa_clock *ipa_clock_init(struct device *dev)
-{
-	struct ipa_clock *clock;
-	struct clk *clk;
-	int ret;
-
-	clk = clk_get(dev, "core");
-	if (IS_ERR(clk)) {
-		dev_err(dev, "error %ld getting core clock\n", PTR_ERR(clk));
-		return ERR_CAST(clk);
-	}
-
-	ret = clk_set_rate(clk, IPA_CORE_CLOCK_RATE);
-	if (ret) {
-		dev_err(dev, "error %d setting core clock rate to %lu\n",
-			ret, IPA_CORE_CLOCK_RATE);
-		goto err_clk_put;
-	}
-
-	clock = kzalloc(sizeof(*clock), GFP_KERNEL);
-	if (!clock) {
-		ret = -ENOMEM;
-		goto err_clk_put;
-	}
-	clock->core = clk;
-
-	ret = ipa_interconnect_init(clock, dev);
-	if (ret)
-		goto err_kfree;
-
-	mutex_init(&clock->mutex);
-	atomic_set(&clock->count, 0);
-
-	return clock;
-
-err_kfree:
-	kfree(clock);
-err_clk_put:
-	clk_put(clk);
-
-	return ERR_PTR(ret);
-}
-
-/* Inverse of ipa_clock_init() */
-void ipa_clock_exit(struct ipa_clock *clock)
-{
-	struct clk *clk = clock->core;
-
-	WARN_ON(atomic_read(&clock->count) != 0);
-	mutex_destroy(&clock->mutex);
-	ipa_interconnect_exit(clock);
-	kfree(clock);
-	clk_put(clk);
-}