2884132ae8
With new version of TMC ETR, there are differing set of features supported by the TMC. Add the capability of a given TMC ETR for making safer decisions at runtime. The device configuration register of the TMC (DEVID) lists some of the capabilities. So, we can detect some of them at probe. However, some of the features (or changes in behavior) are not advertised and we have to depend on the PID to infer the features. So we use a static description of the "unadvertised" capabilities attached to the PID. Combining both, the static and the dynamic capabilities, we maintain a bitmask of the available features which can be later checked to take appropriate actions. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
181 lines
5.2 KiB
C
181 lines
5.2 KiB
C
/*
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* Copyright(C) 2015 Linaro Limited. All rights reserved.
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* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _CORESIGHT_TMC_H
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#define _CORESIGHT_TMC_H
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#include <linux/miscdevice.h>
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#define TMC_RSZ 0x004
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#define TMC_STS 0x00c
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#define TMC_RRD 0x010
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#define TMC_RRP 0x014
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#define TMC_RWP 0x018
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#define TMC_TRG 0x01c
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#define TMC_CTL 0x020
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#define TMC_RWD 0x024
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#define TMC_MODE 0x028
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#define TMC_LBUFLEVEL 0x02c
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#define TMC_CBUFLEVEL 0x030
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#define TMC_BUFWM 0x034
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#define TMC_RRPHI 0x038
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#define TMC_RWPHI 0x03c
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#define TMC_AXICTL 0x110
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#define TMC_DBALO 0x118
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#define TMC_DBAHI 0x11c
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#define TMC_FFSR 0x300
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#define TMC_FFCR 0x304
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#define TMC_PSCR 0x308
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#define TMC_ITMISCOP0 0xee0
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#define TMC_ITTRFLIN 0xee8
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#define TMC_ITATBDATA0 0xeec
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#define TMC_ITATBCTR2 0xef0
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#define TMC_ITATBCTR1 0xef4
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#define TMC_ITATBCTR0 0xef8
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/* register description */
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/* TMC_CTL - 0x020 */
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#define TMC_CTL_CAPT_EN BIT(0)
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/* TMC_STS - 0x00C */
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#define TMC_STS_TMCREADY_BIT 2
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#define TMC_STS_FULL BIT(0)
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#define TMC_STS_TRIGGERED BIT(1)
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/* TMC_AXICTL - 0x110 */
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#define TMC_AXICTL_PROT_CTL_B0 BIT(0)
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#define TMC_AXICTL_PROT_CTL_B1 BIT(1)
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#define TMC_AXICTL_SCT_GAT_MODE BIT(7)
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#define TMC_AXICTL_WR_BURST_16 0xF00
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/* TMC_FFCR - 0x304 */
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#define TMC_FFCR_FLUSHMAN_BIT 6
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#define TMC_FFCR_EN_FMT BIT(0)
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#define TMC_FFCR_EN_TI BIT(1)
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#define TMC_FFCR_FON_FLIN BIT(4)
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#define TMC_FFCR_FON_TRIG_EVT BIT(5)
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#define TMC_FFCR_TRIGON_TRIGIN BIT(8)
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#define TMC_FFCR_STOP_ON_FLUSH BIT(12)
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enum tmc_config_type {
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TMC_CONFIG_TYPE_ETB,
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TMC_CONFIG_TYPE_ETR,
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TMC_CONFIG_TYPE_ETF,
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};
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enum tmc_mode {
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TMC_MODE_CIRCULAR_BUFFER,
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TMC_MODE_SOFTWARE_FIFO,
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TMC_MODE_HARDWARE_FIFO,
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};
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enum tmc_mem_intf_width {
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TMC_MEM_INTF_WIDTH_32BITS = 1,
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TMC_MEM_INTF_WIDTH_64BITS = 2,
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TMC_MEM_INTF_WIDTH_128BITS = 4,
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TMC_MEM_INTF_WIDTH_256BITS = 8,
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};
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/**
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* struct tmc_drvdata - specifics associated to an TMC component
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* @base: memory mapped base address for this component.
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* @dev: the device entity associated to this component.
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* @csdev: component vitals needed by the framework.
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* @miscdev: specifics to handle "/dev/xyz.tmc" entry.
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* @spinlock: only one at a time pls.
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* @buf: area of memory where trace data get sent.
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* @paddr: DMA start location in RAM.
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* @vaddr: virtual representation of @paddr.
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* @size: trace buffer size.
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* @len: size of the available trace.
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* @mode: how this TMC is being used.
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* @config_type: TMC variant, must be of type @tmc_config_type.
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* @memwidth: width of the memory interface databus, in bytes.
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* @trigger_cntr: amount of words to store after a trigger.
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* @etr_caps: Bitmask of capabilities of the TMC ETR, inferred from the
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* device configuration register (DEVID)
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*/
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struct tmc_drvdata {
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void __iomem *base;
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struct device *dev;
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struct coresight_device *csdev;
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struct miscdevice miscdev;
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spinlock_t spinlock;
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bool reading;
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char *buf;
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dma_addr_t paddr;
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void __iomem *vaddr;
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u32 size;
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u32 len;
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u32 mode;
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enum tmc_config_type config_type;
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enum tmc_mem_intf_width memwidth;
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u32 trigger_cntr;
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u32 etr_caps;
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};
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/* Generic functions */
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void tmc_wait_for_tmcready(struct tmc_drvdata *drvdata);
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void tmc_flush_and_stop(struct tmc_drvdata *drvdata);
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void tmc_enable_hw(struct tmc_drvdata *drvdata);
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void tmc_disable_hw(struct tmc_drvdata *drvdata);
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/* ETB/ETF functions */
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int tmc_read_prepare_etb(struct tmc_drvdata *drvdata);
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int tmc_read_unprepare_etb(struct tmc_drvdata *drvdata);
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extern const struct coresight_ops tmc_etb_cs_ops;
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extern const struct coresight_ops tmc_etf_cs_ops;
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/* ETR functions */
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int tmc_read_prepare_etr(struct tmc_drvdata *drvdata);
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int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata);
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extern const struct coresight_ops tmc_etr_cs_ops;
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#define TMC_REG_PAIR(name, lo_off, hi_off) \
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static inline u64 \
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tmc_read_##name(struct tmc_drvdata *drvdata) \
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{ \
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return coresight_read_reg_pair(drvdata->base, lo_off, hi_off); \
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} \
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static inline void \
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tmc_write_##name(struct tmc_drvdata *drvdata, u64 val) \
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{ \
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coresight_write_reg_pair(drvdata->base, val, lo_off, hi_off); \
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}
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TMC_REG_PAIR(rrp, TMC_RRP, TMC_RRPHI)
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TMC_REG_PAIR(rwp, TMC_RWP, TMC_RWPHI)
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TMC_REG_PAIR(dba, TMC_DBALO, TMC_DBAHI)
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/* Initialise the caps from unadvertised static capabilities of the device */
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static inline void tmc_etr_init_caps(struct tmc_drvdata *drvdata, u32 dev_caps)
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{
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WARN_ON(drvdata->etr_caps);
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drvdata->etr_caps = dev_caps;
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}
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static inline void tmc_etr_set_cap(struct tmc_drvdata *drvdata, u32 cap)
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{
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drvdata->etr_caps |= cap;
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}
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static inline bool tmc_etr_has_cap(struct tmc_drvdata *drvdata, u32 cap)
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{
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return !!(drvdata->etr_caps & cap);
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}
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#endif
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