powerpc/cell: Remove support for IBM Cell Blades

IBM Cell Blades used the Cell processor and the "blade" server form
factor. They were sold as models QS20, QS21 & QS22 from roughly 2006 to
2012 [1]. They were used in a few supercomputers (eg. Roadrunner) that
have since been dismantled, and were not that widely used otherwise.

Until recently I still had a working QS22, which meant I was able to
keep the platform support working, but unfortunately that machine has
now died.

I'm not aware of any users. If there is a user that wants to keep the
upstream support working, we can look at bringing some of the code back
as appropriate.

See previous discussion at [2].

Remove the top-level config symbol PPC_IBM_CELL_BLADE, and then
the dependent symbols PPC_CELL_NATIVE, PPC_CELL_COMMON, CBE_RAS,
PPC_IBM_CELL_RESETBUTTON, PPC_IBM_CELL_POWERBUTTON, CBE_THERM, and
AXON_MSI. Then remove the associated C files and headers, and trim
unused header content (some is shared with PS3).

Note that PPC_CELL_COMMON sounds like it would build code shared with
PS3, but it does not. It's a relic from when code was shared between the
Blade support and QPACE support.

Most of the primary authors already have CREDITS entries, with the
exception of Christian, so add one for him.

[1]: https://www.theregister.com/2011/06/28/ibm_kills_qs22_blade
[2]: https://lore.kernel.org/linuxppc-dev/60581044-df82-40ad-b94c-56468007a93e@app.fastmail.com

Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20241218105523.416573-1-mpe@ellerman.id.au

1 files changed, 0 insertions, 274 deletions

diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
deleted file mode 100644
index f64a1ef98aa88..0000000000000
--- a/arch/powerpc/platforms/cell/setup.c
+++ /dev/null
@@ -1,274 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *  linux/arch/powerpc/platforms/cell/cell_setup.c
- *
- *  Copyright (C) 1995  Linus Torvalds
- *  Adapted from 'alpha' version by Gary Thomas
- *  Modified by Cort Dougan (cort@cs.nmt.edu)
- *  Modified by PPC64 Team, IBM Corp
- *  Modified by Cell Team, IBM Deutschland Entwicklung GmbH
- */
-#undef DEBUG
-
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/stddef.h>
-#include <linux/export.h>
-#include <linux/unistd.h>
-#include <linux/user.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/irq.h>
-#include <linux/seq_file.h>
-#include <linux/root_dev.h>
-#include <linux/console.h>
-#include <linux/mutex.h>
-#include <linux/memory_hotplug.h>
-#include <linux/of_platform.h>
-#include <linux/platform_device.h>
-
-#include <asm/mmu.h>
-#include <asm/processor.h>
-#include <asm/io.h>
-#include <asm/rtas.h>
-#include <asm/pci-bridge.h>
-#include <asm/iommu.h>
-#include <asm/dma.h>
-#include <asm/machdep.h>
-#include <asm/time.h>
-#include <asm/nvram.h>
-#include <asm/cputable.h>
-#include <asm/ppc-pci.h>
-#include <asm/irq.h>
-#include <asm/spu.h>
-#include <asm/spu_priv1.h>
-#include <asm/udbg.h>
-#include <asm/mpic.h>
-#include <asm/cell-regs.h>
-#include <asm/io-workarounds.h>
-
-#include "cell.h"
-#include "interrupt.h"
-#include "pervasive.h"
-#include "ras.h"
-
-#ifdef DEBUG
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-static void cell_show_cpuinfo(struct seq_file *m)
-{
-	struct device_node *root;
-	const char *model = "";
-
-	root = of_find_node_by_path("/");
-	if (root)
-		model = of_get_property(root, "model", NULL);
-	seq_printf(m, "machine\t\t: CHRP %s\n", model);
-	of_node_put(root);
-}
-
-static void cell_progress(char *s, unsigned short hex)
-{
-	printk("*** %04x : %s\n", hex, s ? s : "");
-}
-
-static void cell_fixup_pcie_rootcomplex(struct pci_dev *dev)
-{
-	struct pci_controller *hose;
-	const char *s;
-	int i;
-
-	if (!machine_is(cell))
-		return;
-
-	/* We're searching for a direct child of the PHB */
-	if (dev->bus->self != NULL || dev->devfn != 0)
-		return;
-
-	hose = pci_bus_to_host(dev->bus);
-	if (hose == NULL)
-		return;
-
-	/* Only on PCIE */
-	if (!of_device_is_compatible(hose->dn, "pciex"))
-		return;
-
-	/* And only on axon */
-	s = of_get_property(hose->dn, "model", NULL);
-	if (!s || strcmp(s, "Axon") != 0)
-		return;
-
-	for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
-		dev->resource[i].start = dev->resource[i].end = 0;
-		dev->resource[i].flags = 0;
-	}
-
-	printk(KERN_DEBUG "PCI: Hiding resources on Axon PCIE RC %s\n",
-	       pci_name(dev));
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, cell_fixup_pcie_rootcomplex);
-
-static int cell_setup_phb(struct pci_controller *phb)
-{
-	const char *model;
-	struct device_node *np;
-
-	int rc = rtas_setup_phb(phb);
-	if (rc)
-		return rc;
-
-	phb->controller_ops = cell_pci_controller_ops;
-
-	np = phb->dn;
-	model = of_get_property(np, "model", NULL);
-	if (model == NULL || !of_node_name_eq(np, "pci"))
-		return 0;
-
-	/* Setup workarounds for spider */
-	if (strcmp(model, "Spider"))
-		return 0;
-
-	iowa_register_bus(phb, &spiderpci_ops, &spiderpci_iowa_init,
-				  (void *)SPIDER_PCI_REG_BASE);
-	return 0;
-}
-
-static const struct of_device_id cell_bus_ids[] __initconst = {
-	{ .type = "soc", },
-	{ .compatible = "soc", },
-	{ .type = "spider", },
-	{ .type = "axon", },
-	{ .type = "plb5", },
-	{ .type = "plb4", },
-	{ .type = "opb", },
-	{ .type = "ebc", },
-	{},
-};
-
-static int __init cell_publish_devices(void)
-{
-	struct device_node *root = of_find_node_by_path("/");
-	struct device_node *np;
-	int node;
-
-	/* Publish OF platform devices for southbridge IOs */
-	of_platform_bus_probe(NULL, cell_bus_ids, NULL);
-
-	/* On spider based blades, we need to manually create the OF
-	 * platform devices for the PCI host bridges
-	 */
-	for_each_child_of_node(root, np) {
-		if (!of_node_is_type(np, "pci") && !of_node_is_type(np, "pciex"))
-			continue;
-		of_platform_device_create(np, NULL, NULL);
-	}
-
-	of_node_put(root);
-
-	/* There is no device for the MIC memory controller, thus we create
-	 * a platform device for it to attach the EDAC driver to.
-	 */
-	for_each_online_node(node) {
-		if (cbe_get_cpu_mic_tm_regs(cbe_node_to_cpu(node)) == NULL)
-			continue;
-		platform_device_register_simple("cbe-mic", node, NULL, 0);
-	}
-
-	return 0;
-}
-machine_subsys_initcall(cell, cell_publish_devices);
-
-static void __init mpic_init_IRQ(void)
-{
-	struct device_node *dn;
-	struct mpic *mpic;
-
-	for_each_node_by_name(dn, "interrupt-controller") {
-		if (!of_device_is_compatible(dn, "CBEA,platform-open-pic"))
-			continue;
-
-		/* The MPIC driver will get everything it needs from the
-		 * device-tree, just pass 0 to all arguments
-		 */
-		mpic = mpic_alloc(dn, 0, MPIC_SECONDARY | MPIC_NO_RESET,
-				0, 0, " MPIC     ");
-		if (mpic == NULL)
-			continue;
-		mpic_init(mpic);
-	}
-}
-
-
-static void __init cell_init_irq(void)
-{
-	iic_init_IRQ();
-	spider_init_IRQ();
-	mpic_init_IRQ();
-}
-
-static void __init cell_set_dabrx(void)
-{
-	mtspr(SPRN_DABRX, DABRX_KERNEL | DABRX_USER);
-}
-
-static void __init cell_setup_arch(void)
-{
-#ifdef CONFIG_SPU_BASE
-	spu_priv1_ops = &spu_priv1_mmio_ops;
-	spu_management_ops = &spu_management_of_ops;
-#endif
-
-	cbe_regs_init();
-
-	cell_set_dabrx();
-
-#ifdef CONFIG_CBE_RAS
-	cbe_ras_init();
-#endif
-
-#ifdef CONFIG_SMP
-	smp_init_cell();
-#endif
-	/* init to some ~sane value until calibrate_delay() runs */
-	loops_per_jiffy = 50000000;
-
-	/* Find and initialize PCI host bridges */
-	init_pci_config_tokens();
-
-	cbe_pervasive_init();
-
-	mmio_nvram_init();
-}
-
-static int __init cell_probe(void)
-{
-	if (!of_machine_is_compatible("IBM,CBEA") &&
-	    !of_machine_is_compatible("IBM,CPBW-1.0"))
-		return 0;
-
-	pm_power_off = rtas_power_off;
-
-	return 1;
-}
-
-define_machine(cell) {
-	.name			= "Cell",
-	.probe			= cell_probe,
-	.setup_arch		= cell_setup_arch,
-	.show_cpuinfo		= cell_show_cpuinfo,
-	.restart		= rtas_restart,
-	.halt			= rtas_halt,
-	.get_boot_time		= rtas_get_boot_time,
-	.get_rtc_time		= rtas_get_rtc_time,
-	.set_rtc_time		= rtas_set_rtc_time,
-	.progress		= cell_progress,
-	.init_IRQ       	= cell_init_irq,
-	.pci_setup_phb		= cell_setup_phb,
-};
-
-struct pci_controller_ops cell_pci_controller_ops;