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X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On 15-11-2022 13:38, Himal Prasad Ghimiray wrote: > Export lmem maximum memory bandwidth to the userspace via sysfs. > > Signed-off-by: Himal Prasad Ghimiray > --- > drivers/gpu/drm/i915/i915_reg.h | 2 ++ > drivers/gpu/drm/i915/i915_sysfs.c | 27 +++++++++++++++++++++++++++ > 2 files changed, 29 insertions(+) > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h > index c4921c9a60770..3ba1efa995ca9 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -6603,6 +6603,8 @@ > #define POWER_SETUP_I1_WATTS REG_BIT(31) > #define POWER_SETUP_I1_SHIFT 6 /* 10.6 fixed point format */ > #define POWER_SETUP_I1_DATA_MASK REG_GENMASK(15, 0) > +#define PCODE_MEMORY_CONFIG 0x70 > +#define MEMORY_CONFIG_SUBCOMMAND_READ_MAX_BANDWIDTH 0x0 > #define GEN12_PCODE_READ_SAGV_BLOCK_TIME_US 0x23 > #define XEHP_PCODE_FREQUENCY_CONFIG 0x6e /* xehpsdv, pvc */ > /* XEHP_PCODE_FREQUENCY_CONFIG sub-commands (param1) */ > diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c > index 595e8b5749907..0a6efc300998b 100644 > --- a/drivers/gpu/drm/i915/i915_sysfs.c > +++ b/drivers/gpu/drm/i915/i915_sysfs.c > @@ -37,7 +37,10 @@ > > #include "i915_drv.h" > #include "i915_sysfs.h" > +#include "i915_reg.h" > #include "intel_pm.h" > +#include "intel_pcode.h" > + > > struct drm_i915_private *kdev_minor_to_i915(struct device *kdev) > { > @@ -231,11 +234,35 @@ static void i915_setup_error_capture(struct device *kdev) {} > static void i915_teardown_error_capture(struct device *kdev) {} > #endif > prelim naming shall not be used. Thanks, Aravind. > +static ssize_t > +prelim_lmem_max_bw_Mbps_show(struct device *dev, struct device_attribute *attr, char *buff) > +{ > + struct drm_i915_private *i915 = kdev_minor_to_i915(dev); > + u32 val; > + int err; > + > + err = snb_pcode_read_p(&i915->uncore, PCODE_MEMORY_CONFIG, > + MEMORY_CONFIG_SUBCOMMAND_READ_MAX_BANDWIDTH, > + 0x0, &val); > + if (err) > + return err; > + > + return sysfs_emit(buff, "%u\n", val); > +} > + > +static DEVICE_ATTR_RO(prelim_lmem_max_bw_Mbps); > + > void i915_setup_sysfs(struct drm_i915_private *dev_priv) > { > struct device *kdev = dev_priv->drm.primary->kdev; > int ret; > > + if (IS_DG1(dev_priv) || IS_DG2(dev_priv)) { > + ret = sysfs_create_file(&kdev->kobj, &dev_attr_prelim_lmem_max_bw_Mbps.attr); > + if (ret) > + drm_err(&dev_priv->drm, "Setting up sysfs to read max B/W failed\n"); > + } > + > if (HAS_L3_DPF(dev_priv)) { > ret = device_create_bin_file(kdev, &dpf_attrs); > if (ret)