arch: remove tile port

The Tile architecture port was added by Chris Metcalf in 2010, and
maintained until early 2018 when he orphaned it due to his departure
from Mellanox, and nobody else stepped up to maintain it. The product
line is still around in the form of the BlueField SoC, but no longer
uses the Tile architecture.

There are also still products for sale with Tile-GX SoCs, notably the
Mikrotik CCR router family. The products all use old (linux-3.3) kernels
with lots of patches and won't be upgraded by their manufacturers. There
have been efforts to port both OpenWRT and Debian to these, but both
projects have stalled and are very unlikely to be continued in the future.

Given that we are reasonably sure that nobody is still using the port
with an upstream kernel any more, it seems better to remove it now while
the port is in a good shape than to let it bitrot for a few years first.

Cc: Chris Metcalf <chris.d.metcalf@gmail.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: http://www.mellanox.com/page/npu_multicore_overview
Link: https://jenkins.debian.net/view/rebootstrap/job/rebootstrap_tilegx_gcc7/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 584 deletions

diff --git a/arch/tile/gxio/mpipe.c b/arch/tile/gxio/mpipe.c
deleted file mode 100644
index 34de300ab320..000000000000
--- a/arch/tile/gxio/mpipe.c
+++ /dev/null
@@ -1,584 +0,0 @@
-/*
- * Copyright 2012 Tilera Corporation. All Rights Reserved.
- *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-/*
- * Implementation of mpipe gxio calls.
- */
-
-#include <linux/errno.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/string.h>
-
-#include <gxio/iorpc_globals.h>
-#include <gxio/iorpc_mpipe.h>
-#include <gxio/iorpc_mpipe_info.h>
-#include <gxio/kiorpc.h>
-#include <gxio/mpipe.h>
-
-/* HACK: Avoid pointless "shadow" warnings. */
-#define link link_shadow
-
-int gxio_mpipe_init(gxio_mpipe_context_t *context, unsigned int mpipe_index)
-{
-	char file[32];
-
-	int fd;
-	int i;
-
-	if (mpipe_index >= GXIO_MPIPE_INSTANCE_MAX)
-		return -EINVAL;
-
-	snprintf(file, sizeof(file), "mpipe/%d/iorpc", mpipe_index);
-	fd = hv_dev_open((HV_VirtAddr) file, 0);
-
-	context->fd = fd;
-
-	if (fd < 0) {
-		if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
-			return fd;
-		else
-			return -ENODEV;
-	}
-
-	/* Map in the MMIO space. */
-	context->mmio_cfg_base = (void __force *)
-		iorpc_ioremap(fd, HV_MPIPE_CONFIG_MMIO_OFFSET,
-			      HV_MPIPE_CONFIG_MMIO_SIZE);
-	if (context->mmio_cfg_base == NULL)
-		goto cfg_failed;
-
-	context->mmio_fast_base = (void __force *)
-		iorpc_ioremap(fd, HV_MPIPE_FAST_MMIO_OFFSET,
-			      HV_MPIPE_FAST_MMIO_SIZE);
-	if (context->mmio_fast_base == NULL)
-		goto fast_failed;
-
-	/* Initialize the stacks. */
-	for (i = 0; i < 8; i++)
-		context->__stacks.stacks[i] = 255;
-
-	context->instance = mpipe_index;
-
-	return 0;
-
-      fast_failed:
-	iounmap((void __force __iomem *)(context->mmio_cfg_base));
-      cfg_failed:
-	hv_dev_close(context->fd);
-	context->fd = -1;
-	return -ENODEV;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_init);
-
-int gxio_mpipe_destroy(gxio_mpipe_context_t *context)
-{
-	iounmap((void __force __iomem *)(context->mmio_cfg_base));
-	iounmap((void __force __iomem *)(context->mmio_fast_base));
-	return hv_dev_close(context->fd);
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_destroy);
-
-static int16_t gxio_mpipe_buffer_sizes[8] =
-	{ 128, 256, 512, 1024, 1664, 4096, 10368, 16384 };
-
-gxio_mpipe_buffer_size_enum_t gxio_mpipe_buffer_size_to_buffer_size_enum(size_t
-									 size)
-{
-	int i;
-	for (i = 0; i < 7; i++)
-		if (size <= gxio_mpipe_buffer_sizes[i])
-			break;
-	return i;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_buffer_size_to_buffer_size_enum);
-
-size_t gxio_mpipe_buffer_size_enum_to_buffer_size(gxio_mpipe_buffer_size_enum_t
-						  buffer_size_enum)
-{
-	if (buffer_size_enum > 7)
-		buffer_size_enum = 7;
-
-	return gxio_mpipe_buffer_sizes[buffer_size_enum];
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_buffer_size_enum_to_buffer_size);
-
-size_t gxio_mpipe_calc_buffer_stack_bytes(unsigned long buffers)
-{
-	const int BUFFERS_PER_LINE = 12;
-
-	/* Count the number of cachelines. */
-	unsigned long lines =
-		(buffers + BUFFERS_PER_LINE - 1) / BUFFERS_PER_LINE;
-
-	/* Convert to bytes. */
-	return lines * CHIP_L2_LINE_SIZE();
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_calc_buffer_stack_bytes);
-
-int gxio_mpipe_init_buffer_stack(gxio_mpipe_context_t *context,
-				 unsigned int stack,
-				 gxio_mpipe_buffer_size_enum_t
-				 buffer_size_enum, void *mem, size_t mem_size,
-				 unsigned int mem_flags)
-{
-	int result;
-
-	memset(mem, 0, mem_size);
-
-	result = gxio_mpipe_init_buffer_stack_aux(context, mem, mem_size,
-						  mem_flags, stack,
-						  buffer_size_enum);
-	if (result < 0)
-		return result;
-
-	/* Save the stack. */
-	context->__stacks.stacks[buffer_size_enum] = stack;
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_init_buffer_stack);
-
-int gxio_mpipe_init_notif_ring(gxio_mpipe_context_t *context,
-			       unsigned int ring,
-			       void *mem, size_t mem_size,
-			       unsigned int mem_flags)
-{
-	return gxio_mpipe_init_notif_ring_aux(context, mem, mem_size,
-					      mem_flags, ring);
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_init_notif_ring);
-
-int gxio_mpipe_init_notif_group_and_buckets(gxio_mpipe_context_t *context,
-					    unsigned int group,
-					    unsigned int ring,
-					    unsigned int num_rings,
-					    unsigned int bucket,
-					    unsigned int num_buckets,
-					    gxio_mpipe_bucket_mode_t mode)
-{
-	int i;
-	int result;
-
-	gxio_mpipe_bucket_info_t bucket_info = { {
-						  .group = group,
-						  .mode = mode,
-						  }
-	};
-
-	gxio_mpipe_notif_group_bits_t bits = { {0} };
-
-	for (i = 0; i < num_rings; i++)
-		gxio_mpipe_notif_group_add_ring(&bits, ring + i);
-
-	result = gxio_mpipe_init_notif_group(context, group, bits);
-	if (result != 0)
-		return result;
-
-	for (i = 0; i < num_buckets; i++) {
-		bucket_info.notifring = ring + (i % num_rings);
-
-		result = gxio_mpipe_init_bucket(context, bucket + i,
-						bucket_info);
-		if (result != 0)
-			return result;
-	}
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_init_notif_group_and_buckets);
-
-int gxio_mpipe_init_edma_ring(gxio_mpipe_context_t *context,
-			      unsigned int ring, unsigned int channel,
-			      void *mem, size_t mem_size,
-			      unsigned int mem_flags)
-{
-	memset(mem, 0, mem_size);
-
-	return gxio_mpipe_init_edma_ring_aux(context, mem, mem_size, mem_flags,
-					     ring, channel);
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_init_edma_ring);
-
-void gxio_mpipe_rules_init(gxio_mpipe_rules_t *rules,
-			   gxio_mpipe_context_t *context)
-{
-	rules->context = context;
-	memset(&rules->list, 0, sizeof(rules->list));
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_rules_init);
-
-int gxio_mpipe_rules_begin(gxio_mpipe_rules_t *rules,
-			   unsigned int bucket, unsigned int num_buckets,
-			   gxio_mpipe_rules_stacks_t *stacks)
-{
-	int i;
-	int stack = 255;
-
-	gxio_mpipe_rules_list_t *list = &rules->list;
-
-	/* Current rule. */
-	gxio_mpipe_rules_rule_t *rule =
-		(gxio_mpipe_rules_rule_t *) (list->rules + list->head);
-
-	unsigned int head = list->tail;
-
-	/*
-	 * Align next rule properly.
-	 *Note that "dmacs_and_vlans" will also be aligned.
-	 */
-	unsigned int pad = 0;
-	while (((head + pad) % __alignof__(gxio_mpipe_rules_rule_t)) != 0)
-		pad++;
-
-	/*
-	 * Verify room.
-	 * ISSUE: Mark rules as broken on error?
-	 */
-	if (head + pad + sizeof(*rule) >= sizeof(list->rules))
-		return GXIO_MPIPE_ERR_RULES_FULL;
-
-	/* Verify num_buckets is a power of 2. */
-	if (__builtin_popcount(num_buckets) != 1)
-		return GXIO_MPIPE_ERR_RULES_INVALID;
-
-	/* Add padding to previous rule. */
-	rule->size += pad;
-
-	/* Start a new rule. */
-	list->head = head + pad;
-
-	rule = (gxio_mpipe_rules_rule_t *) (list->rules + list->head);
-
-	/* Default some values. */
-	rule->headroom = 2;
-	rule->tailroom = 0;
-	rule->capacity = 16384;
-
-	/* Save the bucket info. */
-	rule->bucket_mask = num_buckets - 1;
-	rule->bucket_first = bucket;
-
-	for (i = 8 - 1; i >= 0; i--) {
-		int maybe =
-			stacks ? stacks->stacks[i] : rules->context->__stacks.
-			stacks[i];
-		if (maybe != 255)
-			stack = maybe;
-		rule->stacks.stacks[i] = stack;
-	}
-
-	if (stack == 255)
-		return GXIO_MPIPE_ERR_RULES_INVALID;
-
-	/* NOTE: Only entries at the end of the array can be 255. */
-	for (i = 8 - 1; i > 0; i--) {
-		if (rule->stacks.stacks[i] == 255) {
-			rule->stacks.stacks[i] = stack;
-			rule->capacity =
-				gxio_mpipe_buffer_size_enum_to_buffer_size(i -
-									   1);
-		}
-	}
-
-	rule->size = sizeof(*rule);
-	list->tail = list->head + rule->size;
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_rules_begin);
-
-int gxio_mpipe_rules_add_channel(gxio_mpipe_rules_t *rules,
-				 unsigned int channel)
-{
-	gxio_mpipe_rules_list_t *list = &rules->list;
-
-	gxio_mpipe_rules_rule_t *rule =
-		(gxio_mpipe_rules_rule_t *) (list->rules + list->head);
-
-	/* Verify channel. */
-	if (channel >= 32)
-		return GXIO_MPIPE_ERR_RULES_INVALID;
-
-	/* Verify begun. */
-	if (list->tail == 0)
-		return GXIO_MPIPE_ERR_RULES_EMPTY;
-
-	rule->channel_bits |= (1UL << channel);
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_rules_add_channel);
-
-int gxio_mpipe_rules_set_headroom(gxio_mpipe_rules_t *rules, uint8_t headroom)
-{
-	gxio_mpipe_rules_list_t *list = &rules->list;
-
-	gxio_mpipe_rules_rule_t *rule =
-		(gxio_mpipe_rules_rule_t *) (list->rules + list->head);
-
-	/* Verify begun. */
-	if (list->tail == 0)
-		return GXIO_MPIPE_ERR_RULES_EMPTY;
-
-	rule->headroom = headroom;
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_rules_set_headroom);
-
-int gxio_mpipe_rules_commit(gxio_mpipe_rules_t *rules)
-{
-	gxio_mpipe_rules_list_t *list = &rules->list;
-	unsigned int size =
-		offsetof(gxio_mpipe_rules_list_t, rules) + list->tail;
-	return gxio_mpipe_commit_rules(rules->context, list, size);
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_rules_commit);
-
-int gxio_mpipe_iqueue_init(gxio_mpipe_iqueue_t *iqueue,
-			   gxio_mpipe_context_t *context,
-			   unsigned int ring,
-			   void *mem, size_t mem_size, unsigned int mem_flags)
-{
-	/* The init call below will verify that "mem_size" is legal. */
-	unsigned int num_entries = mem_size / sizeof(gxio_mpipe_idesc_t);
-
-	iqueue->context = context;
-	iqueue->idescs = (gxio_mpipe_idesc_t *)mem;
-	iqueue->ring = ring;
-	iqueue->num_entries = num_entries;
-	iqueue->mask_num_entries = num_entries - 1;
-	iqueue->log2_num_entries = __builtin_ctz(num_entries);
-	iqueue->head = 1;
-#ifdef __BIG_ENDIAN__
-	iqueue->swapped = 0;
-#endif
-
-	/* Initialize the "tail". */
-	__gxio_mmio_write(mem, iqueue->head);
-
-	return gxio_mpipe_init_notif_ring(context, ring, mem, mem_size,
-					  mem_flags);
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_iqueue_init);
-
-int gxio_mpipe_equeue_init(gxio_mpipe_equeue_t *equeue,
-			   gxio_mpipe_context_t *context,
-			   unsigned int ering,
-			   unsigned int channel,
-			   void *mem, unsigned int mem_size,
-			   unsigned int mem_flags)
-{
-	/* The init call below will verify that "mem_size" is legal. */
-	unsigned int num_entries = mem_size / sizeof(gxio_mpipe_edesc_t);
-
-	/* Offset used to read number of completed commands. */
-	MPIPE_EDMA_POST_REGION_ADDR_t offset;
-
-	int result = gxio_mpipe_init_edma_ring(context, ering, channel,
-					       mem, mem_size, mem_flags);
-	if (result < 0)
-		return result;
-
-	memset(equeue, 0, sizeof(*equeue));
-
-	offset.word = 0;
-	offset.region =
-		MPIPE_MMIO_ADDR__REGION_VAL_EDMA -
-		MPIPE_MMIO_ADDR__REGION_VAL_IDMA;
-	offset.ring = ering;
-
-	__gxio_dma_queue_init(&equeue->dma_queue,
-			      context->mmio_fast_base + offset.word,
-			      num_entries);
-	equeue->edescs = mem;
-	equeue->mask_num_entries = num_entries - 1;
-	equeue->log2_num_entries = __builtin_ctz(num_entries);
-	equeue->context = context;
-	equeue->ering = ering;
-	equeue->channel = channel;
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_equeue_init);
-
-int gxio_mpipe_set_timestamp(gxio_mpipe_context_t *context,
-			     const struct timespec64 *ts)
-{
-	cycles_t cycles = get_cycles();
-	return gxio_mpipe_set_timestamp_aux(context, (uint64_t)ts->tv_sec,
-					    (uint64_t)ts->tv_nsec,
-					    (uint64_t)cycles);
-}
-EXPORT_SYMBOL_GPL(gxio_mpipe_set_timestamp);
-
-int gxio_mpipe_get_timestamp(gxio_mpipe_context_t *context,
-			     struct timespec64 *ts)
-{
-	int ret;
-	cycles_t cycles_prev, cycles_now, clock_rate;
-	cycles_prev = get_cycles();
-	ret = gxio_mpipe_get_timestamp_aux(context, (uint64_t *)&ts->tv_sec,
-					   (uint64_t *)&ts->tv_nsec,
-					   (uint64_t *)&cycles_now);
-	if (ret < 0) {
-		return ret;
-	}
-
-	clock_rate = get_clock_rate();
-	ts->tv_nsec -= (cycles_now - cycles_prev) * 1000000000LL / clock_rate;
-	if (ts->tv_nsec < 0) {
-		ts->tv_nsec += 1000000000LL;
-		ts->tv_sec -= 1;
-	}
-	return ret;
-}
-EXPORT_SYMBOL_GPL(gxio_mpipe_get_timestamp);
-
-int gxio_mpipe_adjust_timestamp(gxio_mpipe_context_t *context, int64_t delta)
-{
-	return gxio_mpipe_adjust_timestamp_aux(context, delta);
-}
-EXPORT_SYMBOL_GPL(gxio_mpipe_adjust_timestamp);
-
-/* Get our internal context used for link name access.  This context is
- *  special in that it is not associated with an mPIPE service domain.
- */
-static gxio_mpipe_context_t *_gxio_get_link_context(void)
-{
-	static gxio_mpipe_context_t context;
-	static gxio_mpipe_context_t *contextp;
-	static int tried_open = 0;
-	static DEFINE_MUTEX(mutex);
-
-	mutex_lock(&mutex);
-
-	if (!tried_open) {
-		int i = 0;
-		tried_open = 1;
-
-		/*
-		 * "4" here is the maximum possible number of mPIPE shims; it's
-		 * an exaggeration but we shouldn't ever go beyond 2 anyway.
-		 */
-		for (i = 0; i < 4; i++) {
-			char file[80];
-
-			snprintf(file, sizeof(file), "mpipe/%d/iorpc_info", i);
-			context.fd = hv_dev_open((HV_VirtAddr) file, 0);
-			if (context.fd < 0)
-				continue;
-
-			contextp = &context;
-			break;
-		}
-	}
-
-	mutex_unlock(&mutex);
-
-	return contextp;
-}
-
-int gxio_mpipe_link_instance(const char *link_name)
-{
-	_gxio_mpipe_link_name_t name;
-	gxio_mpipe_context_t *context = _gxio_get_link_context();
-
-	if (!context)
-		return GXIO_ERR_NO_DEVICE;
-
-	if (strscpy(name.name, link_name, sizeof(name.name)) < 0)
-		return GXIO_ERR_NO_DEVICE;
-
-	return gxio_mpipe_info_instance_aux(context, name);
-}
-EXPORT_SYMBOL_GPL(gxio_mpipe_link_instance);
-
-int gxio_mpipe_link_enumerate_mac(int idx, char *link_name, uint8_t *link_mac)
-{
-	int rv;
-	_gxio_mpipe_link_name_t name;
-	_gxio_mpipe_link_mac_t mac;
-
-	gxio_mpipe_context_t *context = _gxio_get_link_context();
-	if (!context)
-		return GXIO_ERR_NO_DEVICE;
-
-	rv = gxio_mpipe_info_enumerate_aux(context, idx, &name, &mac);
-	if (rv >= 0) {
-		if (strscpy(link_name, name.name, sizeof(name.name)) < 0)
-			return GXIO_ERR_INVAL_MEMORY_SIZE;
-		memcpy(link_mac, mac.mac, sizeof(mac.mac));
-	}
-
-	return rv;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_link_enumerate_mac);
-
-int gxio_mpipe_link_open(gxio_mpipe_link_t *link,
-			 gxio_mpipe_context_t *context, const char *link_name,
-			 unsigned int flags)
-{
-	_gxio_mpipe_link_name_t name;
-	int rv;
-
-	if (strscpy(name.name, link_name, sizeof(name.name)) < 0)
-		return GXIO_ERR_NO_DEVICE;
-
-	rv = gxio_mpipe_link_open_aux(context, name, flags);
-	if (rv < 0)
-		return rv;
-
-	link->context = context;
-	link->channel = rv >> 8;
-	link->mac = rv & 0xFF;
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_link_open);
-
-int gxio_mpipe_link_close(gxio_mpipe_link_t *link)
-{
-	return gxio_mpipe_link_close_aux(link->context, link->mac);
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_link_close);
-
-int gxio_mpipe_link_set_attr(gxio_mpipe_link_t *link, uint32_t attr,
-			     int64_t val)
-{
-	return gxio_mpipe_link_set_attr_aux(link->context, link->mac, attr,
-					    val);
-}
-
-EXPORT_SYMBOL_GPL(gxio_mpipe_link_set_attr);