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/*
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* OMAP L3 Interconnect error handling driver
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*
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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 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 "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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#include <linux/init.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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* 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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* 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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* - Unsupported CMD.
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* L3 tries to access target while it is idle
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* - OCP disconnect.
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* - Address hole error:
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* If DSS/ISS/FDIF/USBHOSTFS access a target where they
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* do not have connectivity, the error is logged in
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* their default target which is DMM2.
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*
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* On High Secure devices, firewall errors are possible and those
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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 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 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->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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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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bus: omap_l3_noc: Add support for discountinous flag mux input numbers
On DRA7, unlike on OMAP4 and OMAP5, the flag mux input numbers used
to indicate the source of errors are not continous. Have a way in the
driver to catch these and WARN the user of the flag mux input thats
either undocumented or wrong.
In the similar vein, Timeout errors in AM43x can't be cleared per h/w
team, neither does it have a STDERRLOG_MAIN to clear the error.
Further, the mux bit offset might not even be indexed into our array
of known mux input description, in which case we'd have a abort.
So, define a static range check for bit description and any definition
which has target_name set to NULL (the ones that are not populated or
ones that are specifically marked in the case of discontinous input
numbers), can handle the same gracefully. Upon occurance of error from
such sources, mask it. Otherwise, we'd have an infinite interrupt
source without any means to clear it.
NOTE: follow on patch ensures that these masked bits are ignored.
[nm@ti.com: rebase, squash and improve]
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
11 years ago
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ret = l3_handle_target(l3, base, flag_mux, err_src);
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bus: omap_l3_noc: Add support for discountinous flag mux input numbers
On DRA7, unlike on OMAP4 and OMAP5, the flag mux input numbers used
to indicate the source of errors are not continous. Have a way in the
driver to catch these and WARN the user of the flag mux input thats
either undocumented or wrong.
In the similar vein, Timeout errors in AM43x can't be cleared per h/w
team, neither does it have a STDERRLOG_MAIN to clear the error.
Further, the mux bit offset might not even be indexed into our array
of known mux input description, in which case we'd have a abort.
So, define a static range check for bit description and any definition
which has target_name set to NULL (the ones that are not populated or
ones that are specifically marked in the case of discontinous input
numbers), can handle the same gracefully. Upon occurance of error from
such sources, mask it. Otherwise, we'd have an infinite interrupt
source without any means to clear it.
NOTE: follow on patch ensures that these masked bits are ignored.
[nm@ti.com: rebase, squash and improve]
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
11 years ago
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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.
|
bus: omap_l3_noc: Add support for discountinous flag mux input numbers
On DRA7, unlike on OMAP4 and OMAP5, the flag mux input numbers used
to indicate the source of errors are not continous. Have a way in the
driver to catch these and WARN the user of the flag mux input thats
either undocumented or wrong.
In the similar vein, Timeout errors in AM43x can't be cleared per h/w
team, neither does it have a STDERRLOG_MAIN to clear the error.
Further, the mux bit offset might not even be indexed into our array
of known mux input description, in which case we'd have a abort.
So, define a static range check for bit description and any definition
which has target_name set to NULL (the ones that are not populated or
ones that are specifically marked in the case of discontinous input
numbers), can handle the same gracefully. Upon occurance of error from
such sources, mask it. Otherwise, we'd have an infinite interrupt
source without any means to clear it.
NOTE: follow on patch ensures that these masked bits are ignored.
[nm@ti.com: rebase, squash and improve]
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
11 years ago
|
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|
*/
|
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if (ret) {
|
bus: omap_l3_noc: Add support for discountinous flag mux input numbers
On DRA7, unlike on OMAP4 and OMAP5, the flag mux input numbers used
to indicate the source of errors are not continous. Have a way in the
driver to catch these and WARN the user of the flag mux input thats
either undocumented or wrong.
In the similar vein, Timeout errors in AM43x can't be cleared per h/w
team, neither does it have a STDERRLOG_MAIN to clear the error.
Further, the mux bit offset might not even be indexed into our array
of known mux input description, in which case we'd have a abort.
So, define a static range check for bit description and any definition
which has target_name set to NULL (the ones that are not populated or
ones that are specifically marked in the case of discontinous input
numbers), can handle the same gracefully. Upon occurance of error from
such sources, mask it. Otherwise, we'd have an infinite interrupt
source without any means to clear it.
NOTE: follow on patch ensures that these masked bits are ignored.
[nm@ti.com: rebase, squash and improve]
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
11 years ago
|
|
|
dev_err(l3->dev,
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"L3 %s error: target %d mod:%d %s\n",
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inttype ? "debug" : "application",
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err_src, i, "(unclearable)");
|
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|
|
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mask_reg = base + flag_mux->offset +
|
bus: omap_l3_noc: Add support for discountinous flag mux input numbers
On DRA7, unlike on OMAP4 and OMAP5, the flag mux input numbers used
to indicate the source of errors are not continous. Have a way in the
driver to catch these and WARN the user of the flag mux input thats
either undocumented or wrong.
In the similar vein, Timeout errors in AM43x can't be cleared per h/w
team, neither does it have a STDERRLOG_MAIN to clear the error.
Further, the mux bit offset might not even be indexed into our array
of known mux input description, in which case we'd have a abort.
So, define a static range check for bit description and any definition
which has target_name set to NULL (the ones that are not populated or
ones that are specifically marked in the case of discontinous input
numbers), can handle the same gracefully. Upon occurance of error from
such sources, mask it. Otherwise, we'd have an infinite interrupt
source without any means to clear it.
NOTE: follow on patch ensures that these masked bits are ignored.
[nm@ti.com: rebase, squash and improve]
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
11 years ago
|
|
|
L3_FLAGMUX_MASK0 + (inttype << 3);
|
|
|
|
mask_val = readl_relaxed(mask_reg);
|
|
|
|
mask_val &= ~(1 << err_src);
|
|
|
|
writel_relaxed(mask_val, mask_reg);
|
|
|
|
|
|
|
|
/* 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;
|
bus: omap_l3_noc: Add support for discountinous flag mux input numbers
On DRA7, unlike on OMAP4 and OMAP5, the flag mux input numbers used
to indicate the source of errors are not continous. Have a way in the
driver to catch these and WARN the user of the flag mux input thats
either undocumented or wrong.
In the similar vein, Timeout errors in AM43x can't be cleared per h/w
team, neither does it have a STDERRLOG_MAIN to clear the error.
Further, the mux bit offset might not even be indexed into our array
of known mux input description, in which case we'd have a abort.
So, define a static range check for bit description and any definition
which has target_name set to NULL (the ones that are not populated or
ones that are specifically marked in the case of discontinous input
numbers), can handle the same gracefully. Upon occurance of error from
such sources, mask it. Otherwise, we'd have an infinite interrupt
source without any means to clear it.
NOTE: follow on patch ensures that these masked bits are ignored.
[nm@ti.com: rebase, squash and improve]
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
11 years ago
|
|
|
}
|
|
|
|
|
|
|
|
/* Error found so break the for loop */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct of_device_id l3_noc_match[] = {
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{.compatible = "ti,omap4-l3-noc", .data = &omap_l3_data},
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{.compatible = "ti,dra7-l3-noc", .data = &dra_l3_data},
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{.compatible = "ti,am4372-l3-noc", .data = &am4372_l3_data},
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{},
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};
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MODULE_DEVICE_TABLE(of, l3_noc_match);
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static int omap_l3_probe(struct platform_device *pdev)
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{
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const struct of_device_id *of_id;
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static struct omap_l3 *l3;
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int ret, i, res_idx;
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of_id = of_match_device(l3_noc_match, &pdev->dev);
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if (!of_id) {
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dev_err(&pdev->dev, "OF data missing\n");
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return -EINVAL;
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}
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l3 = devm_kzalloc(&pdev->dev, sizeof(*l3), GFP_KERNEL);
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if (!l3)
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return -ENOMEM;
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memcpy(l3, of_id->data, sizeof(*l3));
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l3->dev = &pdev->dev;
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platform_set_drvdata(pdev, l3);
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/* Get mem resources */
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for (i = 0, res_idx = 0; i < l3->num_modules; i++) {
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struct resource *res;
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if (l3->l3_base[i] == L3_BASE_IS_SUBMODULE) {
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/* First entry cannot be submodule */
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BUG_ON(i == 0);
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l3->l3_base[i] = l3->l3_base[i - 1];
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continue;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, res_idx);
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l3->l3_base[i] = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(l3->l3_base[i])) {
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dev_err(l3->dev, "ioremap %d failed\n", i);
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return PTR_ERR(l3->l3_base[i]);
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}
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res_idx++;
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}
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/*
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* Setup interrupt Handlers
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*/
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l3->debug_irq = platform_get_irq(pdev, 0);
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ret = devm_request_irq(l3->dev, l3->debug_irq, l3_interrupt_handler,
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IRQF_DISABLED, "l3-dbg-irq", l3);
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if (ret) {
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dev_err(l3->dev, "request_irq failed for %d\n",
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l3->debug_irq);
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return ret;
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}
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l3->app_irq = platform_get_irq(pdev, 1);
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ret = devm_request_irq(l3->dev, l3->app_irq, l3_interrupt_handler,
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IRQF_DISABLED, "l3-app-irq", l3);
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if (ret)
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dev_err(l3->dev, "request_irq failed for %d\n", l3->app_irq);
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return ret;
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}
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static struct platform_driver omap_l3_driver = {
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.probe = omap_l3_probe,
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.driver = {
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.name = "omap_l3_noc",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(l3_noc_match),
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},
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};
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static int __init omap_l3_init(void)
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{
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return platform_driver_register(&omap_l3_driver);
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}
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postcore_initcall_sync(omap_l3_init);
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static void __exit omap_l3_exit(void)
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{
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platform_driver_unregister(&omap_l3_driver);
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}
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module_exit(omap_l3_exit);
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