Re: [PATCH v2 2/5] coresight: Simplify sysfs accessors by using csdev_access abstraction

On Tue, 30 Aug 2022 at 18:26, James Clark james.clark@arm.com wrote:

The coresight_device struct is available in the sysfs accessor, and this contains a csdev_access struct which can be used to access registers. Use this instead of passing in the type of each drvdata so that a common function can be shared between all the cs drivers.

No functional changes.

Signed-off-by: James Clark james.clark@arm.com

drivers/hwtracing/coresight/coresight-catu.c | 18 +++++----- drivers/hwtracing/coresight/coresight-etb10.c | 19 +++++------ .../coresight/coresight-etm3x-sysfs.c | 23 ++++++------- drivers/hwtracing/coresight/coresight-priv.h | 14 ++++---- .../coresight/coresight-replicator.c | 7 ++-- drivers/hwtracing/coresight/coresight-stm.c | 27 +++++++-------- .../hwtracing/coresight/coresight-tmc-core.c | 33 ++++++++----------- include/linux/coresight.h | 18 ++++++++++ 8 files changed, 79 insertions(+), 80 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index e0740c6dbd54..9d89c4054046 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -365,16 +365,14 @@ static const struct etr_buf_operations etr_catu_buf_ops = { .get_data = catu_get_data_etr_buf, };

-coresight_simple_reg32(struct catu_drvdata, devid, CORESIGHT_DEVID); -coresight_simple_reg32(struct catu_drvdata, control, CATU_CONTROL); -coresight_simple_reg32(struct catu_drvdata, status, CATU_STATUS); -coresight_simple_reg32(struct catu_drvdata, mode, CATU_MODE); -coresight_simple_reg32(struct catu_drvdata, axictrl, CATU_AXICTRL); -coresight_simple_reg32(struct catu_drvdata, irqen, CATU_IRQEN); -coresight_simple_reg64(struct catu_drvdata, sladdr,

•                  CATU_SLADDRLO, CATU_SLADDRHI);
  

-coresight_simple_reg64(struct catu_drvdata, inaddr,

•                  CATU_INADDRLO, CATU_INADDRHI);
  

+coresight_simple_reg32(devid, CORESIGHT_DEVID); +coresight_simple_reg32(control, CATU_CONTROL); +coresight_simple_reg32(status, CATU_STATUS); +coresight_simple_reg32(mode, CATU_MODE); +coresight_simple_reg32(axictrl, CATU_AXICTRL); +coresight_simple_reg32(irqen, CATU_IRQEN); +coresight_simple_reg64(sladdr, CATU_SLADDRLO, CATU_SLADDRHI); +coresight_simple_reg64(inaddr, CATU_INADDRLO, CATU_INADDRHI);

static struct attribute *catu_mgmt_attrs[] = { &dev_attr_devid.attr, diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c index efa39820acec..405bb3355cb1 100644 --- a/drivers/hwtracing/coresight/coresight-etb10.c +++ b/drivers/hwtracing/coresight/coresight-etb10.c @@ -655,17 +655,14 @@ static const struct file_operations etb_fops = { .llseek = no_llseek, };

-#define coresight_etb10_reg(name, offset) \

•   coresight_simple_reg32(struct etb_drvdata, name, offset)
  

-coresight_etb10_reg(rdp, ETB_RAM_DEPTH_REG); -coresight_etb10_reg(sts, ETB_STATUS_REG); -coresight_etb10_reg(rrp, ETB_RAM_READ_POINTER); -coresight_etb10_reg(rwp, ETB_RAM_WRITE_POINTER); -coresight_etb10_reg(trg, ETB_TRG); -coresight_etb10_reg(ctl, ETB_CTL_REG); -coresight_etb10_reg(ffsr, ETB_FFSR); -coresight_etb10_reg(ffcr, ETB_FFCR); +coresight_simple_reg32(rdp, ETB_RAM_DEPTH_REG); +coresight_simple_reg32(sts, ETB_STATUS_REG); +coresight_simple_reg32(rrp, ETB_RAM_READ_POINTER); +coresight_simple_reg32(rwp, ETB_RAM_WRITE_POINTER); +coresight_simple_reg32(trg, ETB_TRG); +coresight_simple_reg32(ctl, ETB_CTL_REG); +coresight_simple_reg32(ffsr, ETB_FFSR); +coresight_simple_reg32(ffcr, ETB_FFCR);

static struct attribute *coresight_etb_mgmt_attrs[] = { &dev_attr_rdp.attr, diff --git a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c index 68fcbf4ce7a8..12f8e8176c7e 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c @@ -1252,19 +1252,16 @@ static struct attribute *coresight_etm_attrs[] = { NULL, };

-#define coresight_etm3x_reg(name, offset) \

•   coresight_simple_reg32(struct etm_drvdata, name, offset)
  

-coresight_etm3x_reg(etmccr, ETMCCR); -coresight_etm3x_reg(etmccer, ETMCCER); -coresight_etm3x_reg(etmscr, ETMSCR); -coresight_etm3x_reg(etmidr, ETMIDR); -coresight_etm3x_reg(etmcr, ETMCR); -coresight_etm3x_reg(etmtraceidr, ETMTRACEIDR); -coresight_etm3x_reg(etmteevr, ETMTEEVR); -coresight_etm3x_reg(etmtssvr, ETMTSSCR); -coresight_etm3x_reg(etmtecr1, ETMTECR1); -coresight_etm3x_reg(etmtecr2, ETMTECR2); +coresight_simple_reg32(etmccr, ETMCCR); +coresight_simple_reg32(etmccer, ETMCCER); +coresight_simple_reg32(etmscr, ETMSCR); +coresight_simple_reg32(etmidr, ETMIDR); +coresight_simple_reg32(etmcr, ETMCR); +coresight_simple_reg32(etmtraceidr, ETMTRACEIDR); +coresight_simple_reg32(etmteevr, ETMTEEVR); +coresight_simple_reg32(etmtssvr, ETMTSSCR); +coresight_simple_reg32(etmtecr1, ETMTECR1); +coresight_simple_reg32(etmtecr2, ETMTECR2);

static struct attribute *coresight_etm_mgmt_attrs[] = { &dev_attr_etmccr.attr, diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index f2458b794ef3..cf8ae768106e 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -40,23 +40,23 @@ #define ETM_MODE_EXCL_KERN BIT(30) #define ETM_MODE_EXCL_USER BIT(31)

-#define __coresight_simple_show(type, name, lo_off, hi_off) \ +#define __coresight_simple_show(name, lo_off, hi_off) \ static ssize_t name##_show(struct device *_dev, \ struct device_attribute *attr, char *buf) \ { \

•   type *drvdata = dev_get_drvdata(_dev->parent);                  \
  

•   struct coresight_device *csdev = container_of(_dev, struct coresight_device, dev); \
    u64 val;                                                        \
    pm_runtime_get_sync(_dev->parent);                              \
  

•   val = coresight_read_reg_pair(drvdata->base, lo_off, hi_off);   \
  

•   val = csdev_access_relaxed_read_pair(&csdev->access, lo_off, hi_off);   \
    pm_runtime_put_sync(_dev->parent);                              \
    return scnprintf(buf, PAGE_SIZE, "0x%llx\n", val);              \
  

} \ static DEVICE_ATTR_RO(name)

-#define coresight_simple_reg32(type, name, offset) \

•   __coresight_simple_show(type, name, offset, -1)
  

-#define coresight_simple_reg64(type, name, lo_off, hi_off) \

•   __coresight_simple_show(type, name, lo_off, hi_off)
  

+#define coresight_simple_reg32(name, offset) \

•   __coresight_simple_show(name, offset, -1)
  

+#define coresight_simple_reg64(name, lo_off, hi_off) \

•   __coresight_simple_show(name, lo_off, hi_off)
  
  

extern const u32 coresight_barrier_pkt[4]; #define CORESIGHT_BARRIER_PKT_SIZE (sizeof(coresight_barrier_pkt)) diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c index b86acbc74cf0..7cffcbb2ec42 100644 --- a/drivers/hwtracing/coresight/coresight-replicator.c +++ b/drivers/hwtracing/coresight/coresight-replicator.c @@ -196,11 +196,8 @@ static const struct coresight_ops replicator_cs_ops = { .link_ops = &replicator_link_ops, };

-#define coresight_replicator_reg(name, offset) \

•   coresight_simple_reg32(struct replicator_drvdata, name, offset)
  

-coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0); -coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1); +coresight_simple_reg32(idfilter0, REPLICATOR_IDFILTER0); +coresight_simple_reg32(idfilter1, REPLICATOR_IDFILTER1);

static struct attribute *replicator_mgmt_attrs[] = { &dev_attr_idfilter0.attr, diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c index bb14a3a8a921..4a31905604fe 100644 --- a/drivers/hwtracing/coresight/coresight-stm.c +++ b/drivers/hwtracing/coresight/coresight-stm.c @@ -634,21 +634,18 @@ static ssize_t traceid_store(struct device *dev, } static DEVICE_ATTR_RW(traceid);

-#define coresight_stm_reg(name, offset) \

•   coresight_simple_reg32(struct stm_drvdata, name, offset)
  

-coresight_stm_reg(tcsr, STMTCSR); -coresight_stm_reg(tsfreqr, STMTSFREQR); -coresight_stm_reg(syncr, STMSYNCR); -coresight_stm_reg(sper, STMSPER); -coresight_stm_reg(spter, STMSPTER); -coresight_stm_reg(privmaskr, STMPRIVMASKR); -coresight_stm_reg(spscr, STMSPSCR); -coresight_stm_reg(spmscr, STMSPMSCR); -coresight_stm_reg(spfeat1r, STMSPFEAT1R); -coresight_stm_reg(spfeat2r, STMSPFEAT2R); -coresight_stm_reg(spfeat3r, STMSPFEAT3R); -coresight_stm_reg(devid, CORESIGHT_DEVID); +coresight_simple_reg32(tcsr, STMTCSR); +coresight_simple_reg32(tsfreqr, STMTSFREQR); +coresight_simple_reg32(syncr, STMSYNCR); +coresight_simple_reg32(sper, STMSPER); +coresight_simple_reg32(spter, STMSPTER); +coresight_simple_reg32(privmaskr, STMPRIVMASKR); +coresight_simple_reg32(spscr, STMSPSCR); +coresight_simple_reg32(spmscr, STMSPMSCR); +coresight_simple_reg32(spfeat1r, STMSPFEAT1R); +coresight_simple_reg32(spfeat2r, STMSPFEAT2R); +coresight_simple_reg32(spfeat3r, STMSPFEAT3R); +coresight_simple_reg32(devid, CORESIGHT_DEVID);

static struct attribute *coresight_stm_attrs[] = { &dev_attr_hwevent_enable.attr, diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c index d0276af82494..781d213526b7 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-core.c +++ b/drivers/hwtracing/coresight/coresight-tmc-core.c @@ -251,25 +251,20 @@ static enum tmc_mem_intf_width tmc_get_memwidth(u32 devid) return memwidth; }

-#define coresight_tmc_reg(name, offset) \

•   coresight_simple_reg32(struct tmc_drvdata, name, offset)
  

-#define coresight_tmc_reg64(name, lo_off, hi_off) \

•   coresight_simple_reg64(struct tmc_drvdata, name, lo_off, hi_off)
  

-coresight_tmc_reg(rsz, TMC_RSZ); -coresight_tmc_reg(sts, TMC_STS); -coresight_tmc_reg(trg, TMC_TRG); -coresight_tmc_reg(ctl, TMC_CTL); -coresight_tmc_reg(ffsr, TMC_FFSR); -coresight_tmc_reg(ffcr, TMC_FFCR); -coresight_tmc_reg(mode, TMC_MODE); -coresight_tmc_reg(pscr, TMC_PSCR); -coresight_tmc_reg(axictl, TMC_AXICTL); -coresight_tmc_reg(authstatus, TMC_AUTHSTATUS); -coresight_tmc_reg(devid, CORESIGHT_DEVID); -coresight_tmc_reg64(rrp, TMC_RRP, TMC_RRPHI); -coresight_tmc_reg64(rwp, TMC_RWP, TMC_RWPHI); -coresight_tmc_reg64(dba, TMC_DBALO, TMC_DBAHI); +coresight_simple_reg32(rsz, TMC_RSZ); +coresight_simple_reg32(sts, TMC_STS); +coresight_simple_reg32(trg, TMC_TRG); +coresight_simple_reg32(ctl, TMC_CTL); +coresight_simple_reg32(ffsr, TMC_FFSR); +coresight_simple_reg32(ffcr, TMC_FFCR); +coresight_simple_reg32(mode, TMC_MODE); +coresight_simple_reg32(pscr, TMC_PSCR); +coresight_simple_reg32(axictl, TMC_AXICTL); +coresight_simple_reg32(authstatus, TMC_AUTHSTATUS); +coresight_simple_reg32(devid, CORESIGHT_DEVID); +coresight_simple_reg64(rrp, TMC_RRP, TMC_RRPHI); +coresight_simple_reg64(rwp, TMC_RWP, TMC_RWPHI); +coresight_simple_reg64(dba, TMC_DBALO, TMC_DBAHI);

static struct attribute *coresight_tmc_mgmt_attrs[] = { &dev_attr_rsz.attr, diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 9f445f09fcfe..a47dd1f62216 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -372,6 +372,24 @@ static inline u32 csdev_access_relaxed_read32(struct csdev_access *csa, return csa->read(offset, true, false); }

+static inline u64 csdev_access_relaxed_read_pair(struct csdev_access *csa,

•                                            s32 lo_offset, s32 hi_offset)
  

+{

•   u64 val;
  

•   if (likely(csa->io_mem)) {
  

•           val = readl_relaxed(csa->base + lo_offset);
  

•           val |= (hi_offset < 0) ? 0 :
  

•                  (u64)readl_relaxed(csa->base + hi_offset) << 32;
  

•           return val;
  

•   }
  

•   val = csa->read(lo_offset, true, false);
  

•   val |= (hi_offset < 0) ? 0 :
  

•          (u64)csa->read(hi_offset, true, false) << 32;
  

•   return val;
  

+}

static inline u32 csdev_access_read32(struct csdev_access *csa, u32 offset) { if (likely(csa->io_mem)) -- 2.28.0

Reviewed-by: Mike Leach mike.leach@linaro.org