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Merge tag 'omap-for-v3.16/l3-noc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/drivers
Merge "ARM: omap l3-noc bus driver changes for v3.16 merge window, resend" from Tony Lindgren: Improvments to omap l3-noc bus driver for v3.16 merge window to add support for am347x and dra7. * tag 'omap-for-v3.16/l3-noc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (25 commits) bus: omap_l3_noc: Add AM4372 interconnect error data bus: omap_l3_noc: Add DRA7 interconnect error data bus: omap_l3_noc: introduce concept of submodule bus: omap_l3_noc: Add information about the context of operation bus: omap_l3_noc: add information about the type of operation bus: omap_l3_noc: ignore masked out unclearable targets bus: omap_l3_noc: improve readability by using helper for slave event parsing bus: omap_l3_noc: make error reporting and handling common bus: omap_l3_noc: fix masterid detection bus: omap_l3_noc: convert flagmux information into a structure bus: omap_l3_noc: use of_match_data to pick up SoC information bus: omap_l3_noc: Add support for discountinous flag mux input numbers bus: omap_l3_noc: convert target information into a structure bus: omap_l3_noc: move L3 master data structure out bus: omap_l3_noc: un-obfuscate l3_targ address computation bus: omap_l3_noc: switch over to relaxed variants of readl/writel bus: omap_l3_noc: populate l3->dev and use it bus: omap_l3_noc: remove iclk from omap_l3 struct bus: omap_l3_noc: rename functions and data to omap_l3 bus: omap_l3_noc: Fix copyright information ... Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson
@@ -6,6 +6,8 @@ provided by Arteris.
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Required properties:
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- compatible : Should be "ti,omap3-l3-smx" for OMAP3 family
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Should be "ti,omap4-l3-noc" for OMAP4 family
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Should be "ti,dra7-l3-noc" for DRA7 family
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Should be "ti,am4372-l3-noc" for AM43 family
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- reg: Contains L3 register address range for each noc domain.
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- ti,hwmods: "l3_main_1", ... One hwmod for each noc domain.
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+227
-175
@@ -1,43 +1,45 @@
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/*
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* OMAP4XXX L3 Interconnect error handling driver
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* OMAP L3 Interconnect error handling driver
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*
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* Copyright (C) 2011 Texas Corporation
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* Copyright (C) 2011-2014 Texas Instruments Incorporated - http://www.ti.com/
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* Santosh Shilimkar <santosh.shilimkar@ti.com>
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* Sricharan <r.sricharan@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include "omap_l3_noc.h"
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/*
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* Interrupt Handler for L3 error detection.
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* 1) Identify the L3 clockdomain partition to which the error belongs to.
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* 2) Identify the slave where the error information is logged
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* 3) Print the logged information.
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* 4) Add dump stack to provide kernel trace.
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/**
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* l3_handle_target() - Handle Target specific parse and reporting
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* @l3: pointer to l3 struct
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* @base: base address of clkdm
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* @flag_mux: flagmux corresponding to the event
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* @err_src: error source index of the slave (target)
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*
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* Two Types of errors :
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* This does the second part of the error interrupt handling:
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* 3) Parse in the slave information
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* 4) Print the logged information.
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* 5) Add dump stack to provide kernel trace.
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* 6) Clear the source if known.
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*
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* This handles two types of errors:
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* 1) Custom errors in L3 :
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* Target like DMM/FW/EMIF generates SRESP=ERR error
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* 2) Standard L3 error:
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@@ -53,214 +55,264 @@
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* can be trapped as well. But the trapping is implemented as part
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* secure software and hence need not be implemented here.
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*/
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static int l3_handle_target(struct omap_l3 *l3, void __iomem *base,
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struct l3_flagmux_data *flag_mux, int err_src)
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{
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int k;
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u32 std_err_main, clear, masterid;
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u8 op_code, m_req_info;
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void __iomem *l3_targ_base;
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void __iomem *l3_targ_stderr, *l3_targ_slvofslsb, *l3_targ_mstaddr;
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void __iomem *l3_targ_hdr, *l3_targ_info;
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struct l3_target_data *l3_targ_inst;
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struct l3_masters_data *master;
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char *target_name, *master_name = "UN IDENTIFIED";
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char *err_description;
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char err_string[30] = { 0 };
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char info_string[60] = { 0 };
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/* We DONOT expect err_src to go out of bounds */
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BUG_ON(err_src > MAX_CLKDM_TARGETS);
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if (err_src < flag_mux->num_targ_data) {
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l3_targ_inst = &flag_mux->l3_targ[err_src];
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target_name = l3_targ_inst->name;
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l3_targ_base = base + l3_targ_inst->offset;
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} else {
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target_name = L3_TARGET_NOT_SUPPORTED;
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}
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if (target_name == L3_TARGET_NOT_SUPPORTED)
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return -ENODEV;
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/* Read the stderrlog_main_source from clk domain */
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l3_targ_stderr = l3_targ_base + L3_TARG_STDERRLOG_MAIN;
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l3_targ_slvofslsb = l3_targ_base + L3_TARG_STDERRLOG_SLVOFSLSB;
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std_err_main = readl_relaxed(l3_targ_stderr);
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switch (std_err_main & CUSTOM_ERROR) {
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case STANDARD_ERROR:
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err_description = "Standard";
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snprintf(err_string, sizeof(err_string),
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": At Address: 0x%08X ",
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readl_relaxed(l3_targ_slvofslsb));
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l3_targ_mstaddr = l3_targ_base + L3_TARG_STDERRLOG_MSTADDR;
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l3_targ_hdr = l3_targ_base + L3_TARG_STDERRLOG_HDR;
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l3_targ_info = l3_targ_base + L3_TARG_STDERRLOG_INFO;
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break;
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case CUSTOM_ERROR:
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err_description = "Custom";
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l3_targ_mstaddr = l3_targ_base +
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L3_TARG_STDERRLOG_CINFO_MSTADDR;
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l3_targ_hdr = l3_targ_base + L3_TARG_STDERRLOG_CINFO_OPCODE;
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l3_targ_info = l3_targ_base + L3_TARG_STDERRLOG_CINFO_INFO;
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break;
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default:
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/* Nothing to be handled here as of now */
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return 0;
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}
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/* STDERRLOG_MSTADDR Stores the NTTP master address. */
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masterid = (readl_relaxed(l3_targ_mstaddr) &
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l3->mst_addr_mask) >> __ffs(l3->mst_addr_mask);
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for (k = 0, master = l3->l3_masters; k < l3->num_masters;
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k++, master++) {
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if (masterid == master->id) {
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master_name = master->name;
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break;
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}
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}
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op_code = readl_relaxed(l3_targ_hdr) & 0x7;
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m_req_info = readl_relaxed(l3_targ_info) & 0xF;
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snprintf(info_string, sizeof(info_string),
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": %s in %s mode during %s access",
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(m_req_info & BIT(0)) ? "Opcode Fetch" : "Data Access",
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(m_req_info & BIT(1)) ? "Supervisor" : "User",
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(m_req_info & BIT(3)) ? "Debug" : "Functional");
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WARN(true,
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"%s:L3 %s Error: MASTER %s TARGET %s (%s)%s%s\n",
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dev_name(l3->dev),
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err_description,
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master_name, target_name,
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l3_transaction_type[op_code],
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err_string, info_string);
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/* clear the std error log*/
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clear = std_err_main | CLEAR_STDERR_LOG;
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writel_relaxed(clear, l3_targ_stderr);
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return 0;
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}
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/**
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* l3_interrupt_handler() - interrupt handler for l3 events
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* @irq: irq number
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* @_l3: pointer to l3 structure
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*
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* Interrupt Handler for L3 error detection.
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* 1) Identify the L3 clockdomain partition to which the error belongs to.
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* 2) Identify the slave where the error information is logged
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* ... handle the slave event..
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* 7) if the slave is unknown, mask out the slave.
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*/
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static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
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{
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struct omap4_l3 *l3 = _l3;
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int inttype, i, k;
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struct omap_l3 *l3 = _l3;
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int inttype, i, ret;
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int err_src = 0;
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u32 std_err_main, err_reg, clear, masterid;
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void __iomem *base, *l3_targ_base;
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char *target_name, *master_name = "UN IDENTIFIED";
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u32 err_reg, mask_val;
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void __iomem *base, *mask_reg;
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struct l3_flagmux_data *flag_mux;
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/* Get the Type of interrupt */
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inttype = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
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for (i = 0; i < L3_MODULES; i++) {
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for (i = 0; i < l3->num_modules; i++) {
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/*
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* Read the regerr register of the clock domain
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* to determine the source
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*/
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base = l3->l3_base[i];
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err_reg = __raw_readl(base + l3_flagmux[i] +
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+ L3_FLAGMUX_REGERR0 + (inttype << 3));
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flag_mux = l3->l3_flagmux[i];
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err_reg = readl_relaxed(base + flag_mux->offset +
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L3_FLAGMUX_REGERR0 + (inttype << 3));
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err_reg &= ~(inttype ? flag_mux->mask_app_bits :
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flag_mux->mask_dbg_bits);
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/* Get the corresponding error and analyse */
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if (err_reg) {
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/* Identify the source from control status register */
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err_src = __ffs(err_reg);
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/* Read the stderrlog_main_source from clk domain */
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l3_targ_base = base + *(l3_targ[i] + err_src);
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std_err_main = __raw_readl(l3_targ_base +
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L3_TARG_STDERRLOG_MAIN);
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masterid = __raw_readl(l3_targ_base +
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L3_TARG_STDERRLOG_MSTADDR);
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ret = l3_handle_target(l3, base, flag_mux, err_src);
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switch (std_err_main & CUSTOM_ERROR) {
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case STANDARD_ERROR:
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target_name =
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l3_targ_inst_name[i][err_src];
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WARN(true, "L3 standard error: TARGET:%s at address 0x%x\n",
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target_name,
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__raw_readl(l3_targ_base +
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L3_TARG_STDERRLOG_SLVOFSLSB));
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/* clear the std error log*/
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clear = std_err_main | CLEAR_STDERR_LOG;
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writel(clear, l3_targ_base +
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L3_TARG_STDERRLOG_MAIN);
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break;
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/*
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* Certain plaforms may have "undocumented" status
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* pending on boot. So dont generate a severe warning
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* here. Just mask it off to prevent the error from
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* reoccuring and locking up the system.
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*/
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||||
if (ret) {
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||||
dev_err(l3->dev,
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"L3 %s error: target %d mod:%d %s\n",
|
||||
inttype ? "debug" : "application",
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err_src, i, "(unclearable)");
|
||||
|
||||
case CUSTOM_ERROR:
|
||||
target_name =
|
||||
l3_targ_inst_name[i][err_src];
|
||||
for (k = 0; k < NUM_OF_L3_MASTERS; k++) {
|
||||
if (masterid == l3_masters[k].id)
|
||||
master_name =
|
||||
l3_masters[k].name;
|
||||
}
|
||||
WARN(true, "L3 custom error: MASTER:%s TARGET:%s\n",
|
||||
master_name, target_name);
|
||||
/* clear the std error log*/
|
||||
clear = std_err_main | CLEAR_STDERR_LOG;
|
||||
writel(clear, l3_targ_base +
|
||||
L3_TARG_STDERRLOG_MAIN);
|
||||
break;
|
||||
mask_reg = base + flag_mux->offset +
|
||||
L3_FLAGMUX_MASK0 + (inttype << 3);
|
||||
mask_val = readl_relaxed(mask_reg);
|
||||
mask_val &= ~(1 << err_src);
|
||||
writel_relaxed(mask_val, mask_reg);
|
||||
|
||||
default:
|
||||
/* Nothing to be handled here as of now */
|
||||
break;
|
||||
/* Mark these bits as to be ignored */
|
||||
if (inttype)
|
||||
flag_mux->mask_app_bits |= 1 << err_src;
|
||||
else
|
||||
flag_mux->mask_dbg_bits |= 1 << err_src;
|
||||
}
|
||||
/* Error found so break the for loop */
|
||||
break;
|
||||
|
||||
/* Error found so break the for loop */
|
||||
break;
|
||||
}
|
||||
}
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int omap4_l3_probe(struct platform_device *pdev)
|
||||
{
|
||||
static struct omap4_l3 *l3;
|
||||
struct resource *res;
|
||||
int ret;
|
||||
static const struct of_device_id l3_noc_match[] = {
|
||||
{.compatible = "ti,omap4-l3-noc", .data = &omap_l3_data},
|
||||
{.compatible = "ti,dra7-l3-noc", .data = &dra_l3_data},
|
||||
{.compatible = "ti,am4372-l3-noc", .data = &am4372_l3_data},
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, l3_noc_match);
|
||||
|
||||
l3 = kzalloc(sizeof(*l3), GFP_KERNEL);
|
||||
static int omap_l3_probe(struct platform_device *pdev)
|
||||
{
|
||||
const struct of_device_id *of_id;
|
||||
static struct omap_l3 *l3;
|
||||
int ret, i, res_idx;
|
||||
|
||||
of_id = of_match_device(l3_noc_match, &pdev->dev);
|
||||
if (!of_id) {
|
||||
dev_err(&pdev->dev, "OF data missing\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
l3 = devm_kzalloc(&pdev->dev, sizeof(*l3), GFP_KERNEL);
|
||||
if (!l3)
|
||||
return -ENOMEM;
|
||||
|
||||
memcpy(l3, of_id->data, sizeof(*l3));
|
||||
l3->dev = &pdev->dev;
|
||||
platform_set_drvdata(pdev, l3);
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!res) {
|
||||
dev_err(&pdev->dev, "couldn't find resource 0\n");
|
||||
ret = -ENODEV;
|
||||
goto err0;
|
||||
}
|
||||
|
||||
l3->l3_base[0] = ioremap(res->start, resource_size(res));
|
||||
if (!l3->l3_base[0]) {
|
||||
dev_err(&pdev->dev, "ioremap failed\n");
|
||||
ret = -ENOMEM;
|
||||
goto err0;
|
||||
}
|
||||
/* Get mem resources */
|
||||
for (i = 0, res_idx = 0; i < l3->num_modules; i++) {
|
||||
struct resource *res;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
||||
if (!res) {
|
||||
dev_err(&pdev->dev, "couldn't find resource 1\n");
|
||||
ret = -ENODEV;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
l3->l3_base[1] = ioremap(res->start, resource_size(res));
|
||||
if (!l3->l3_base[1]) {
|
||||
dev_err(&pdev->dev, "ioremap failed\n");
|
||||
ret = -ENOMEM;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
|
||||
if (!res) {
|
||||
dev_err(&pdev->dev, "couldn't find resource 2\n");
|
||||
ret = -ENODEV;
|
||||
goto err2;
|
||||
}
|
||||
|
||||
l3->l3_base[2] = ioremap(res->start, resource_size(res));
|
||||
if (!l3->l3_base[2]) {
|
||||
dev_err(&pdev->dev, "ioremap failed\n");
|
||||
ret = -ENOMEM;
|
||||
goto err2;
|
||||
if (l3->l3_base[i] == L3_BASE_IS_SUBMODULE) {
|
||||
/* First entry cannot be submodule */
|
||||
BUG_ON(i == 0);
|
||||
l3->l3_base[i] = l3->l3_base[i - 1];
|
||||
continue;
|
||||
}
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, res_idx);
|
||||
l3->l3_base[i] = devm_ioremap_resource(&pdev->dev, res);
|
||||
if (IS_ERR(l3->l3_base[i])) {
|
||||
dev_err(l3->dev, "ioremap %d failed\n", i);
|
||||
return PTR_ERR(l3->l3_base[i]);
|
||||
}
|
||||
res_idx++;
|
||||
}
|
||||
|
||||
/*
|
||||
* Setup interrupt Handlers
|
||||
*/
|
||||
l3->debug_irq = platform_get_irq(pdev, 0);
|
||||
ret = request_irq(l3->debug_irq,
|
||||
l3_interrupt_handler,
|
||||
IRQF_DISABLED, "l3-dbg-irq", l3);
|
||||
ret = devm_request_irq(l3->dev, l3->debug_irq, l3_interrupt_handler,
|
||||
IRQF_DISABLED, "l3-dbg-irq", l3);
|
||||
if (ret) {
|
||||
pr_crit("L3: request_irq failed to register for 0x%x\n",
|
||||
l3->debug_irq);
|
||||
goto err3;
|
||||
dev_err(l3->dev, "request_irq failed for %d\n",
|
||||
l3->debug_irq);
|
||||
return ret;
|
||||
}
|
||||
|
||||
l3->app_irq = platform_get_irq(pdev, 1);
|
||||
ret = request_irq(l3->app_irq,
|
||||
l3_interrupt_handler,
|
||||
IRQF_DISABLED, "l3-app-irq", l3);
|
||||
if (ret) {
|
||||
pr_crit("L3: request_irq failed to register for 0x%x\n",
|
||||
l3->app_irq);
|
||||
goto err4;
|
||||
}
|
||||
ret = devm_request_irq(l3->dev, l3->app_irq, l3_interrupt_handler,
|
||||
IRQF_DISABLED, "l3-app-irq", l3);
|
||||
if (ret)
|
||||
dev_err(l3->dev, "request_irq failed for %d\n", l3->app_irq);
|
||||
|
||||
return 0;
|
||||
|
||||
err4:
|
||||
free_irq(l3->debug_irq, l3);
|
||||
err3:
|
||||
iounmap(l3->l3_base[2]);
|
||||
err2:
|
||||
iounmap(l3->l3_base[1]);
|
||||
err1:
|
||||
iounmap(l3->l3_base[0]);
|
||||
err0:
|
||||
kfree(l3);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int omap4_l3_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct omap4_l3 *l3 = platform_get_drvdata(pdev);
|
||||
|
||||
free_irq(l3->app_irq, l3);
|
||||
free_irq(l3->debug_irq, l3);
|
||||
iounmap(l3->l3_base[0]);
|
||||
iounmap(l3->l3_base[1]);
|
||||
iounmap(l3->l3_base[2]);
|
||||
kfree(l3);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if defined(CONFIG_OF)
|
||||
static const struct of_device_id l3_noc_match[] = {
|
||||
{.compatible = "ti,omap4-l3-noc", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, l3_noc_match);
|
||||
#else
|
||||
#define l3_noc_match NULL
|
||||
#endif
|
||||
|
||||
static struct platform_driver omap4_l3_driver = {
|
||||
.probe = omap4_l3_probe,
|
||||
.remove = omap4_l3_remove,
|
||||
static struct platform_driver omap_l3_driver = {
|
||||
.probe = omap_l3_probe,
|
||||
.driver = {
|
||||
.name = "omap_l3_noc",
|
||||
.owner = THIS_MODULE,
|
||||
.of_match_table = l3_noc_match,
|
||||
.of_match_table = of_match_ptr(l3_noc_match),
|
||||
},
|
||||
};
|
||||
|
||||
static int __init omap4_l3_init(void)
|
||||
static int __init omap_l3_init(void)
|
||||
{
|
||||
return platform_driver_register(&omap4_l3_driver);
|
||||
return platform_driver_register(&omap_l3_driver);
|
||||
}
|
||||
postcore_initcall_sync(omap4_l3_init);
|
||||
postcore_initcall_sync(omap_l3_init);
|
||||
|
||||
static void __exit omap4_l3_exit(void)
|
||||
static void __exit omap_l3_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&omap4_l3_driver);
|
||||
platform_driver_unregister(&omap_l3_driver);
|
||||
}
|
||||
module_exit(omap4_l3_exit);
|
||||
module_exit(omap_l3_exit);
|
||||
|
||||
+417
-118
File diff suppressed because it is too large
Load Diff
Reference in New Issue
Block a user