/* * Functions related to generic timeout handling of requests. */ #include #include #include #include #include "blk.h" #ifdef CONFIG_FAIL_IO_TIMEOUT static DECLARE_FAULT_ATTR(fail_io_timeout); static int __init setup_fail_io_timeout(char *str) { return setup_fault_attr(&fail_io_timeout, str); } __setup("fail_io_timeout=", setup_fail_io_timeout); int blk_should_fake_timeout(struct request_queue *q) { if (!test_bit(QUEUE_FLAG_FAIL_IO, &q->queue_flags)) return 0; return should_fail(&fail_io_timeout, 1); } static int __init fail_io_timeout_debugfs(void) { struct dentry *dir = fault_create_debugfs_attr("fail_io_timeout", NULL, &fail_io_timeout); return IS_ERR(dir) ? PTR_ERR(dir) : 0; } late_initcall(fail_io_timeout_debugfs); ssize_t part_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) { struct gendisk *disk = dev_to_disk(dev); int set = test_bit(QUEUE_FLAG_FAIL_IO, &disk->queue->queue_flags); return sprintf(buf, "%d\n", set != 0); } ssize_t part_timeout_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct gendisk *disk = dev_to_disk(dev); int val; if (count) { struct request_queue *q = disk->queue; char *p = (char *) buf; val = simple_strtoul(p, &p, 10); spin_lock_irq(q->queue_lock); if (val) queue_flag_set(QUEUE_FLAG_FAIL_IO, q); else queue_flag_clear(QUEUE_FLAG_FAIL_IO, q); spin_unlock_irq(q->queue_lock); } return count; } #endif /* CONFIG_FAIL_IO_TIMEOUT */ /* * blk_delete_timer - Delete/cancel timer for a given function. * @req: request that we are canceling timer for * */ void blk_delete_timer(struct request *req) { list_del_init(&req->timeout_list); } static void blk_rq_timed_out(struct request *req) { struct request_queue *q = req->q; enum blk_eh_timer_return ret = BLK_EH_RESET_TIMER; if (q->rq_timed_out_fn) ret = q->rq_timed_out_fn(req); switch (ret) { case BLK_EH_HANDLED: __blk_complete_request(req); break; case BLK_EH_RESET_TIMER: blk_clear_rq_complete(req); blk_add_timer(req); break; case BLK_EH_NOT_HANDLED: /* * LLD handles this for now but in the future * we can send a request msg to abort the command * and we can move more of the generic scsi eh code to * the blk layer. */ break; default: printk(KERN_ERR "block: bad eh return: %d\n", ret); break; } } void blk_rq_timed_out_timer(unsigned long data) { struct request_queue *q = (struct request_queue *) data; unsigned long flags, next = 0; struct request *rq, *tmp; int next_set = 0; spin_lock_irqsave(q->queue_lock, flags); list_for_each_entry_safe(rq, tmp, &q->timeout_list, timeout_list) { if (time_after_eq(jiffies, rq->deadline)) { list_del_init(&rq->timeout_list); /* * Check if we raced with end io completion */ if (blk_mark_rq_complete(rq)) continue; blk_rq_timed_out(rq); } else if (!next_set || time_after(next, rq->deadline)) { next = rq->deadline; next_set = 1; } } if (next_set) mod_timer(&q->timeout, round_jiffies_up(next)); spin_unlock_irqrestore(q->queue_lock, flags); } /** * blk_abort_request -- Request request recovery for the specified command * @req: pointer to the request of interest * * This function requests that the block layer start recovery for the * request by deleting the timer and calling the q's timeout function. * LLDDs who implement their own error recovery MAY ignore the timeout * event if they generated blk_abort_req. Must hold queue lock. */ void blk_abort_request(struct request *req) { if (blk_mark_rq_complete(req)) return; blk_delete_timer(req); blk_rq_timed_out(req); } EXPORT_SYMBOL_GPL(blk_abort_request); /** * blk_add_timer - Start timeout timer for a single request * @req: request that is about to start running. * * Notes: * Each request has its own timer, and as it is added to the queue, we * set up the timer. When the request completes, we cancel the timer. */ void blk_add_timer(struct request *req) { struct request_queue *q = req->q; unsigned long expiry; if (!q->rq_timed_out_fn) return; BUG_ON(!list_empty(&req->timeout_list)); BUG_ON(test_bit(REQ_ATOM_COMPLETE, &req->atomic_flags)); /* * Some LLDs, like scsi, peek at the timeout to prevent a * command from being retried forever. */ if (!req->timeout) req->timeout = q->rq_timeout; req->deadline = jiffies + req->timeout; list_add_tail(&req->timeout_list, &q->timeout_list); /* * If the timer isn't already pending or this timeout is earlier * than an existing one, modify the timer. Round up to next nearest * second. */ expiry = round_jiffies_up(req->deadline); if (!timer_pending(&q->timeout) || time_before(expiry, q->timeout.expires)) mod_timer(&q->timeout, expiry); } isk-dont-compile-when-not-necessary-spl-tpl mirror/u-boot.git
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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
 */

#include <config.h>
#include <common.h>
#include <asm/armv7.h>
#include <asm/cache.h>
#include <asm/gic.h>
#include <asm/io.h>
#include <asm/psci.h>
#include <asm/secure.h>
#include <hang.h>
#include <linux/bitops.h>

/* PWR */
#define PWR_CR3					0x0c
#define PWR_MPUCR				0x10

#define PWR_CR3_DDRSREN				BIT(10)
#define PWR_CR3_DDRRETEN			BIT(12)

#define PWR_MPUCR_PDDS				BIT(0)
#define PWR_MPUCR_CSTDBYDIS			BIT(3)
#define PWR_MPUCR_CSSF				BIT(9)

/* RCC */
#define RCC_MSSCKSELR				0x48
#define RCC_DDRITFCR				0xd8

#define RCC_DDRITFCR_DDRC1EN			BIT(0)
#define RCC_DDRITFCR_DDRC1LPEN			BIT(1)
#define RCC_DDRITFCR_DDRC2EN			BIT(2)
#define RCC_DDRITFCR_DDRC2LPEN			BIT(3)
#define RCC_DDRITFCR_DDRPHYCEN			BIT(4)
#define RCC_DDRITFCR_DDRPHYCLPEN		BIT(5)
#define RCC_DDRITFCR_DDRCAPBEN			BIT(6)
#define RCC_DDRITFCR_DDRCAPBLPEN		BIT(7)
#define RCC_DDRITFCR_AXIDCGEN			BIT(8)
#define RCC_DDRITFCR_DDRPHYCAPBEN		BIT(9)
#define RCC_DDRITFCR_DDRPHYCAPBLPEN		BIT(10)
#define RCC_DDRITFCR_DDRCKMOD_MASK		GENMASK(22, 20)
#define RCC_DDRITFCR_GSKPCTRL			BIT(24)

#define RCC_MP_SREQSETR				0x104
#define RCC_MP_SREQCLRR				0x108

#define RCC_MP_CIER				0x414
#define RCC_MP_CIFR				0x418
#define RCC_MP_CIFR_WKUPF			BIT(20)

#define RCC_MCUDIVR				0x830
#define RCC_PLL3CR				0x880
#define RCC_PLL4CR				0x894

/* SYSCFG */
#define SYSCFG_CMPCR				0x20
#define SYSCFG_CMPCR_SW_CTRL			BIT(2)
#define SYSCFG_CMPENSETR			0x24
#define SYSCFG_CMPENCLRR			0x28
#define SYSCFG_CMPENR_MPUEN			BIT(0)

/* DDR Controller registers offsets */
#define DDRCTRL_STAT				0x004
#define DDRCTRL_PWRCTL				0x030
#define DDRCTRL_PWRTMG				0x034
#define DDRCTRL_HWLPCTL				0x038
#define DDRCTRL_DFIMISC				0x1b0
#define DDRCTRL_SWCTL				0x320
#define DDRCTRL_SWSTAT				0x324
#define DDRCTRL_PSTAT				0x3fc
#define DDRCTRL_PCTRL_0				0x490
#define DDRCTRL_PCTRL_1				0x540

/* DDR Controller Register fields */
#define DDRCTRL_STAT_OPERATING_MODE_MASK	GENMASK(2, 0)
#define DDRCTRL_STAT_OPERATING_MODE_NORMAL	0x1
#define DDRCTRL_STAT_OPERATING_MODE_SR		0x3
#define DDRCTRL_STAT_SELFREF_TYPE_MASK		GENMASK(5, 4)
#define DDRCTRL_STAT_SELFREF_TYPE_ASR		(0x3 << 4)
#define DDRCTRL_STAT_SELFREF_TYPE_SR		(0x2 << 4)

#define DDRCTRL_PWRCTL_SELFREF_EN		BIT(0)
#define DDRCTRL_PWRCTL_EN_DFI_DRAM_CLK_DISABLE	BIT(3)
#define DDRCTRL_PWRCTL_SELFREF_SW		BIT(5)

#define DDRCTRL_PWRTMG_SELFREF_TO_X32_MASK	GENMASK(23, 16)
#define DDRCTRL_PWRTMG_SELFREF_TO_X32_0		BIT(16)

#define DDRCTRL_HWLPCTL_HW_LP_EN		BIT(0)

#define DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN	BIT(0)

#define DDRCTRL_SWCTL_SW_DONE			BIT(0)

#define DDRCTRL_SWSTAT_SW_DONE_ACK		BIT(0)

#define DDRCTRL_PSTAT_RD_PORT_BUSY_0		BIT(0)
#define DDRCTRL_PSTAT_RD_PORT_BUSY_1		BIT(1)
#define DDRCTRL_PSTAT_WR_PORT_BUSY_0		BIT(16)
#define DDRCTRL_PSTAT_WR_PORT_BUSY_1		BIT(17)

#define DDRCTRL_PCTRL_N_PORT_EN			BIT(0)

/* DDR PHY registers offsets */
#define DDRPHYC_PIR				0x004
#define DDRPHYC_PGSR				0x00c
#define DDRPHYC_ACDLLCR				0x014
#define DDRPHYC_ACIOCR				0x024
#define DDRPHYC_DXCCR				0x028
#define DDRPHYC_DSGCR				0x02c
#define DDRPHYC_ZQ0CR0				0x180
#define DDRPHYC_DX0DLLCR			0x1cc
#define DDRPHYC_DX1DLLCR			0x20c
#define DDRPHYC_DX2DLLCR			0x24c
#define DDRPHYC_DX3DLLCR			0x28c

/* DDR PHY Register fields */
#define DDRPHYC_PIR_INIT			BIT(0)
#define DDRPHYC_PIR_DLLSRST			BIT(1)
#define DDRPHYC_PIR_DLLLOCK			BIT(2)
#define DDRPHYC_PIR_ITMSRST			BIT(4)

#define DDRPHYC_PGSR_IDONE			BIT(0)

#define DDRPHYC_ACDLLCR_DLLSRST			BIT(30)
#define DDRPHYC_ACDLLCR_DLLDIS			BIT(31)

#define DDRPHYC_ACIOCR_ACOE			BIT(1)
#define DDRPHYC_ACIOCR_ACPDD			BIT(3)
#define DDRPHYC_ACIOCR_ACPDR			BIT(4)
#define DDRPHYC_ACIOCR_CKPDD_MASK		GENMASK(10, 8)
#define DDRPHYC_ACIOCR_CKPDD_0			BIT(8)
#define DDRPHYC_ACIOCR_CKPDR_MASK		GENMASK(13, 11)
#define DDRPHYC_ACIOCR_CKPDR_0			BIT(11)
#define DDRPHYC_ACIOCR_CSPDD_MASK		GENMASK(20, 18)
#define DDRPHYC_ACIOCR_CSPDD_0			BIT(18)

#define DDRPHYC_DXCCR_DXPDD			BIT(2)
#define DDRPHYC_DXCCR_DXPDR			BIT(3)

#define DDRPHYC_DSGCR_CKEPDD_MASK		GENMASK(19, 16)
#define DDRPHYC_DSGCR_CKEPDD_0			BIT(16)
#define DDRPHYC_DSGCR_ODTPDD_MASK		GENMASK(23, 20)
#define DDRPHYC_DSGCR_ODTPDD_0			BIT(20)
#define DDRPHYC_DSGCR_NL2PD			BIT(24)