From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: arm@kernel.org, arnd@arndb.de, olof@lixom.net,
punit.agrawal@arm.com, mark.rutland@arm.com, will.deacon@arm.com,
linux-kernel@vger.kernel.org,
Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH 04/13] arm-cci: Refactor CCI PMU enable/disable methods
Date: Tue, 23 Feb 2016 10:49:46 +0000 [thread overview]
Message-ID: <1456224595-3282-5-git-send-email-suzuki.poulose@arm.com> (raw)
In-Reply-To: <1456224595-3282-1-git-send-email-suzuki.poulose@arm.com>
This patch refactors the CCI PMU driver code a little bit to
make it easier share the code for enabling/disabling the CCI
PMU. This will be used by the hooks to work around the special cases
where writing to a counter is not always that easy(e.g, CCI-500)
No functional changes.
Cc: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
drivers/bus/arm-cci.c | 32 ++++++++++++++++++++++----------
1 file changed, 22 insertions(+), 10 deletions(-)
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 6a76ac7..e42842b 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -606,6 +606,26 @@ static int cci500_validate_hw_event(struct cci_pmu *cci_pmu,
}
#endif /* CONFIG_ARM_CCI500_PMU */
+/* Should be called with cci_pmu->hw_events->pmu_lock held */
+static void __cci_pmu_enable(void)
+{
+ u32 val;
+
+ /* Enable all the PMU counters. */
+ val = readl_relaxed(cci_ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
+ writel(val, cci_ctrl_base + CCI_PMCR);
+}
+
+/* Should be called with cci_pmu->hw_events->pmu_lock held */
+static void __cci_pmu_disable(void)
+{
+ u32 val;
+
+ /* Disable all the PMU counters. */
+ val = readl_relaxed(cci_ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
+ writel(val, cci_ctrl_base + CCI_PMCR);
+}
+
static ssize_t cci_pmu_format_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -895,16 +915,12 @@ static void cci_pmu_enable(struct pmu *pmu)
struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
int enabled = bitmap_weight(hw_events->used_mask, cci_pmu->num_cntrs);
unsigned long flags;
- u32 val;
if (!enabled)
return;
raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
-
- /* Enable all the PMU counters. */
- val = readl_relaxed(cci_ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
- writel(val, cci_ctrl_base + CCI_PMCR);
+ __cci_pmu_enable();
raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
}
@@ -914,13 +930,9 @@ static void cci_pmu_disable(struct pmu *pmu)
struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
unsigned long flags;
- u32 val;
raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
-
- /* Disable all the PMU counters. */
- val = readl_relaxed(cci_ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
- writel(val, cci_ctrl_base + CCI_PMCR);
+ __cci_pmu_disable();
raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
}
--
1.7.9.5
next prev parent reply other threads:[~2016-02-23 10:50 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-23 10:49 [PATCH 00/13] arm-cci: PMU driver updates for 4.6 Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 01/13] arm-cci: simplify sysfs attr handling Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 02/13] arm-cci: fix handling cpumask_any_but return value Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 03/13] arm-cci: Group writes to counter Suzuki K Poulose
2016-02-23 10:49 ` Suzuki K Poulose [this message]
2016-02-23 10:49 ` [PATCH 05/13] arm-cci: Delay PMU counter writes to pmu::pmu_enable Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 06/13] arm-cci: write_counter: Remove redundant check Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 07/13] arm-cci: Get the status of a counter Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 08/13] arm-cci: Add routines to save/restore all counters Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 09/13] arm-cci: Add helper to enable PMU without synchornising counters Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 10/13] arm-cci: Provide hook for writing to PMU counters Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 11/13] arm-cci: CCI-500: Work around PMU counter writes Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 12/13] arm-cci500: Rearrange PMU driver for code sharing with CCI-550 PMU Suzuki K Poulose
2016-02-23 10:49 ` [PATCH 13/13] arm-cci: CoreLink CCI-550 PMU driver Suzuki K Poulose
2016-02-23 11:40 ` [PATCH 00/13] arm-cci: PMU driver updates for 4.6 Will Deacon
2016-02-23 13:55 ` Suzuki K. Poulose
2016-02-24 16:58 ` Olof Johansson
2016-02-24 17:12 ` Will Deacon
2016-02-24 18:46 ` Olof Johansson
2016-02-26 16:48 ` Will Deacon
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