edac: remove tile driver

The Tile architecture is obsolete and getting removed from the kernel,
this driver appears to only be used there, and not on the ARM based
successors (Tile-Mx, BlueField), so we should remove it as well.
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/edac/Kconfig

@@ -317,14 +317,6 @@ config EDAC_CPC925
 	  a companion chip to the PowerPC 970 family of
 	  processors.
 
-config EDAC_TILE
-	tristate "Tilera Memory Controller"
-	depends on TILE
-	default y
-	help
-	  Support for error detection and correction on the
-	  Tilera memory controller.
-
 config EDAC_HIGHBANK_MC
 	tristate "Highbank Memory Controller"
 	depends on ARCH_HIGHBANK

drivers/edac/Makefile

@@ -64,8 +64,6 @@ obj-$(CONFIG_EDAC_PPC4XX)		+= ppc4xx_edac.o
 obj-$(CONFIG_EDAC_AMD8111)		+= amd8111_edac.o
 obj-$(CONFIG_EDAC_AMD8131)		+= amd8131_edac.o
 
-obj-$(CONFIG_EDAC_TILE)			+= tile_edac.o
-
 obj-$(CONFIG_EDAC_HIGHBANK_MC)		+= highbank_mc_edac.o
 obj-$(CONFIG_EDAC_HIGHBANK_L2)		+= highbank_l2_edac.o
 

drivers/edac/tile_edac.c

-/*
- * Copyright 2011 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.
- * Tilera-specific EDAC driver.
- *
- * This source code is derived from the following driver:
- *
- * Cell MIC driver for ECC counting
- *
- * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
- *                <benh@kernel.crashing.org>
- *
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-#include <linux/edac.h>
-#include <hv/hypervisor.h>
-#include <hv/drv_mshim_intf.h>
-
-#include "edac_module.h"
-
-#define DRV_NAME	"tile-edac"
-
-/* Number of cs_rows needed per memory controller on TILEPro. */
-#define TILE_EDAC_NR_CSROWS	1
-
-/* Number of channels per memory controller on TILEPro. */
-#define TILE_EDAC_NR_CHANS	1
-
-/* Granularity of reported error in bytes on TILEPro. */
-#define TILE_EDAC_ERROR_GRAIN	8
-
-/* TILE processor has multiple independent memory controllers. */
-struct platform_device *mshim_pdev[TILE_MAX_MSHIMS];
-
-struct tile_edac_priv {
-	int		hv_devhdl;	/* Hypervisor device handle. */
-	int		node;		/* Memory controller instance #. */
-	unsigned int	ce_count;	/*
-					 * Correctable-error counter
-					 * kept by the driver.
-					 */
-};
-
-static void tile_edac_check(struct mem_ctl_info *mci)
-{
-	struct tile_edac_priv	*priv = mci->pvt_info;
-	struct mshim_mem_error	mem_error;
-
-	if (hv_dev_pread(priv->hv_devhdl, 0, (HV_VirtAddr)&mem_error,
-		sizeof(struct mshim_mem_error), MSHIM_MEM_ERROR_OFF) !=
-		sizeof(struct mshim_mem_error)) {
-		pr_err(DRV_NAME ": MSHIM_MEM_ERROR_OFF pread failure.\n");
-		return;
-	}
-
-	/* Check if the current error count is different from the saved one. */
-	if (mem_error.sbe_count != priv->ce_count) {
-		dev_dbg(mci->pdev, "ECC CE err on node %d\n", priv->node);
-		priv->ce_count = mem_error.sbe_count;
-		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
-				     0, 0, 0,
-				     0, 0, -1,
-				     mci->ctl_name, "");
-	}
-}
-
-/*
- * Initialize the 'csrows' table within the mci control structure with the
- * addressing of memory.
- */
-static int tile_edac_init_csrows(struct mem_ctl_info *mci)
-{
-	struct csrow_info	*csrow = mci->csrows[0];
-	struct tile_edac_priv	*priv = mci->pvt_info;
-	struct mshim_mem_info	mem_info;
-	struct dimm_info *dimm = csrow->channels[0]->dimm;
-
-	if (hv_dev_pread(priv->hv_devhdl, 0, (HV_VirtAddr)&mem_info,
-		sizeof(struct mshim_mem_info), MSHIM_MEM_INFO_OFF) !=
-		sizeof(struct mshim_mem_info)) {
-		pr_err(DRV_NAME ": MSHIM_MEM_INFO_OFF pread failure.\n");
-		return -1;
-	}
-
-	if (mem_info.mem_ecc)
-		dimm->edac_mode = EDAC_SECDED;
-	else
-		dimm->edac_mode = EDAC_NONE;
-	switch (mem_info.mem_type) {
-	case DDR2:
-		dimm->mtype = MEM_DDR2;
-		break;
-
-	case DDR3:
-		dimm->mtype = MEM_DDR3;
-		break;
-
-	default:
-		return -1;
-	}
-
-	dimm->nr_pages = mem_info.mem_size >> PAGE_SHIFT;
-	dimm->grain = TILE_EDAC_ERROR_GRAIN;
-	dimm->dtype = DEV_UNKNOWN;
-
-	return 0;
-}
-
-static int tile_edac_mc_probe(struct platform_device *pdev)
-{
-	char			hv_file[32];
-	int			hv_devhdl;
-	struct mem_ctl_info	*mci;
-	struct edac_mc_layer	layers[2];
-	struct tile_edac_priv	*priv;
-	int			rc;
-
-	sprintf(hv_file, "mshim/%d", pdev->id);
-	hv_devhdl = hv_dev_open((HV_VirtAddr)hv_file, 0);
-	if (hv_devhdl < 0)
-		return -EINVAL;
-
-	/* A TILE MC has a single channel and one chip-select row. */
-	layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
-	layers[0].size = TILE_EDAC_NR_CSROWS;
-	layers[0].is_virt_csrow = true;
-	layers[1].type = EDAC_MC_LAYER_CHANNEL;
-	layers[1].size = TILE_EDAC_NR_CHANS;
-	layers[1].is_virt_csrow = false;
-	mci = edac_mc_alloc(pdev->id, ARRAY_SIZE(layers), layers,
-			    sizeof(struct tile_edac_priv));
-	if (mci == NULL)
-		return -ENOMEM;
-	priv = mci->pvt_info;
-	priv->node = pdev->id;
-	priv->hv_devhdl = hv_devhdl;
-
-	mci->pdev = &pdev->dev;
-	mci->mtype_cap = MEM_FLAG_DDR2;
-	mci->edac_ctl_cap = EDAC_FLAG_SECDED;
-
-	mci->mod_name = DRV_NAME;
-#ifdef __tilegx__
-	mci->ctl_name = "TILEGx_Memory_Controller";
-#else
-	mci->ctl_name = "TILEPro_Memory_Controller";
-#endif
-	mci->dev_name = dev_name(&pdev->dev);
-	mci->edac_check = tile_edac_check;
-
-	/*
-	 * Initialize the MC control structure 'csrows' table
-	 * with the mapping and control information.
-	 */
-	if (tile_edac_init_csrows(mci)) {
-		/* No csrows found. */
-		mci->edac_cap = EDAC_FLAG_NONE;
-	} else {
-		mci->edac_cap = EDAC_FLAG_SECDED;
-	}
-
-	platform_set_drvdata(pdev, mci);
-
-	/* Register with EDAC core */
-	rc = edac_mc_add_mc(mci);
-	if (rc) {
-		dev_err(&pdev->dev, "failed to register with EDAC core\n");
-		edac_mc_free(mci);
-		return rc;
-	}
-
-	return 0;
-}
-
-static int tile_edac_mc_remove(struct platform_device *pdev)
-{
-	struct mem_ctl_info *mci = platform_get_drvdata(pdev);
-
-	edac_mc_del_mc(&pdev->dev);
-	if (mci)
-		edac_mc_free(mci);
-	return 0;
-}
-
-static struct platform_driver tile_edac_mc_driver = {
-	.driver		= {
-		.name	= DRV_NAME,
-	},
-	.probe		= tile_edac_mc_probe,
-	.remove		= tile_edac_mc_remove,
-};
-
-/*
- * Driver init routine.
- */
-static int __init tile_edac_init(void)
-{
-	char	hv_file[32];
-	struct platform_device *pdev;
-	int i, err, num = 0;
-
-	/* Only support POLL mode. */
-	edac_op_state = EDAC_OPSTATE_POLL;
-
-	err = platform_driver_register(&tile_edac_mc_driver);
-	if (err)
-		return err;
-
-	for (i = 0; i < TILE_MAX_MSHIMS; i++) {
-		/*
-		 * Not all memory controllers are configured such as in the
-		 * case of a simulator. So we register only those mshims
-		 * that are configured by the hypervisor.
-		 */
-		sprintf(hv_file, "mshim/%d", i);
-		if (hv_dev_open((HV_VirtAddr)hv_file, 0) < 0)
-			continue;
-
-		pdev = platform_device_register_simple(DRV_NAME, i, NULL, 0);
-		if (IS_ERR(pdev))
-			continue;
-		mshim_pdev[i] = pdev;
-		num++;
-	}
-
-	if (num == 0) {
-		platform_driver_unregister(&tile_edac_mc_driver);
-		return -ENODEV;
-	}
-	return 0;
-}
-
-/*
- * Driver cleanup routine.
- */
-static void __exit tile_edac_exit(void)
-{
-	int i;
-
-	for (i = 0; i < TILE_MAX_MSHIMS; i++) {
-		struct platform_device *pdev = mshim_pdev[i];
-		if (!pdev)
-			continue;
-
-		platform_device_unregister(pdev);
-	}
-	platform_driver_unregister(&tile_edac_mc_driver);
-}
-
-module_init(tile_edac_init);
-module_exit(tile_edac_exit);