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* [PATCH 1/2] platform/x86/intel/pmt: allow user offset for PMT callbacks
@ 2024-11-08 20:19 Michael J. Ruhl
  2024-11-08 20:19 ` [PATCH 2/2] drm/xe/vsec: Support BMG devices Michael J. Ruhl
                   ` (9 more replies)
  0 siblings, 10 replies; 15+ messages in thread
From: Michael J. Ruhl @ 2024-11-08 20:19 UTC (permalink / raw)
  To: intel-xe, platform-driver-x86, david.e.box, ilpo.jarvinen,
	andriy.shevchenko, hdegoede, rodrigo.vivi, lucas.demarchi
  Cc: michael.j.ruhl

Usage of the telem sysfs file allows for partial reads at
an offset.

The current callback method returns the buffer starting
from offset 0 only.

Include the requested offset in the callback.
Update the necsessary address calculations with the offset.

Fixes: e92affc74cd8 ("platform/x86/intel/vsec: Add PMT read callbacks")
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
---
 drivers/platform/x86/intel/pmt/class.c     | 10 +++++-----
 drivers/platform/x86/intel/pmt/class.h     |  2 +-
 drivers/platform/x86/intel/pmt/telemetry.c |  2 +-
 include/linux/intel_vsec.h                 |  3 ++-
 4 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c
index c04bb7f97a4d..657d72b9e675 100644
--- a/drivers/platform/x86/intel/pmt/class.c
+++ b/drivers/platform/x86/intel/pmt/class.c
@@ -59,16 +59,16 @@ pmt_memcpy64_fromio(void *to, const u64 __iomem *from, size_t count)
 }
 
 int pmt_telem_read_mmio(struct pci_dev *pdev, struct pmt_callbacks *cb, u32 guid, void *buf,
-			void __iomem *addr, u32 count)
+			void __iomem *addr, loff_t off, u32 count)
 {
 	if (cb && cb->read_telem)
-		return cb->read_telem(pdev, guid, buf, count);
+		return cb->read_telem(pdev, guid, buf, off, count);
 
 	if (guid == GUID_SPR_PUNIT)
 		/* PUNIT on SPR only supports aligned 64-bit read */
-		return pmt_memcpy64_fromio(buf, addr, count);
+		return pmt_memcpy64_fromio(buf, addr + off, count);
 
-	memcpy_fromio(buf, addr, count);
+	memcpy_fromio(buf, addr + off, count);
 
 	return count;
 }
@@ -96,7 +96,7 @@ intel_pmt_read(struct file *filp, struct kobject *kobj,
 		count = entry->size - off;
 
 	count = pmt_telem_read_mmio(entry->ep->pcidev, entry->cb, entry->header.guid, buf,
-				    entry->base + off, count);
+				    entry->base, off, count);
 
 	return count;
 }
diff --git a/drivers/platform/x86/intel/pmt/class.h b/drivers/platform/x86/intel/pmt/class.h
index a267ac964423..b2006d57779d 100644
--- a/drivers/platform/x86/intel/pmt/class.h
+++ b/drivers/platform/x86/intel/pmt/class.h
@@ -62,7 +62,7 @@ struct intel_pmt_namespace {
 };
 
 int pmt_telem_read_mmio(struct pci_dev *pdev, struct pmt_callbacks *cb, u32 guid, void *buf,
-			void __iomem *addr, u32 count);
+			void __iomem *addr, loff_t off, u32 count);
 bool intel_pmt_is_early_client_hw(struct device *dev);
 int intel_pmt_dev_create(struct intel_pmt_entry *entry,
 			 struct intel_pmt_namespace *ns,
diff --git a/drivers/platform/x86/intel/pmt/telemetry.c b/drivers/platform/x86/intel/pmt/telemetry.c
index c9feac859e57..0cea617c6c2e 100644
--- a/drivers/platform/x86/intel/pmt/telemetry.c
+++ b/drivers/platform/x86/intel/pmt/telemetry.c
@@ -219,7 +219,7 @@ int pmt_telem_read(struct telem_endpoint *ep, u32 id, u64 *data, u32 count)
 	if (offset + NUM_BYTES_QWORD(count) > size)
 		return -EINVAL;
 
-	pmt_telem_read_mmio(ep->pcidev, ep->cb, ep->header.guid, data, ep->base + offset,
+	pmt_telem_read_mmio(ep->pcidev, ep->cb, ep->header.guid, data, ep->base, offset,
 			    NUM_BYTES_QWORD(count));
 
 	return ep->present ? 0 : -EPIPE;
diff --git a/include/linux/intel_vsec.h b/include/linux/intel_vsec.h
index 11ee185566c3..b94beab64610 100644
--- a/include/linux/intel_vsec.h
+++ b/include/linux/intel_vsec.h
@@ -74,10 +74,11 @@ enum intel_vsec_quirks {
  * @pdev:  PCI device reference for the callback's use
  * @guid:  ID of data to acccss
  * @data:  buffer for the data to be copied
+ * @off:   offset into the requested buffer
  * @count: size of buffer
  */
 struct pmt_callbacks {
-	int (*read_telem)(struct pci_dev *pdev, u32 guid, u64 *data, u32 count);
+	int (*read_telem)(struct pci_dev *pdev, u32 guid, u64 *data, loff_t off, u32 count);
 };
 
 /**
-- 
2.44.0


^ permalink raw reply related	[flat|nested] 15+ messages in thread

end of thread, other threads:[~2024-11-12 15:28 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-11-08 20:19 [PATCH 1/2] platform/x86/intel/pmt: allow user offset for PMT callbacks Michael J. Ruhl
2024-11-08 20:19 ` [PATCH 2/2] drm/xe/vsec: Support BMG devices Michael J. Ruhl
2024-11-11  8:39   ` Andy Shevchenko
2024-11-12 14:48     ` Ruhl, Michael J
2024-11-08 20:39 ` ✓ CI.Patch_applied: success for series starting with [1/2] platform/x86/intel/pmt: allow user offset for PMT callbacks Patchwork
2024-11-08 20:39 ` ✗ CI.checkpatch: warning " Patchwork
2024-11-08 20:41 ` ✓ CI.KUnit: success " Patchwork
2024-11-08 21:01 ` ✓ CI.Build: " Patchwork
2024-11-08 21:03 ` ✓ CI.Hooks: " Patchwork
2024-11-08 21:05 ` ✓ CI.checksparse: " Patchwork
2024-11-08 21:47 ` ✓ CI.BAT: " Patchwork
2024-11-09 23:58 ` ✗ CI.FULL: failure " Patchwork
2024-11-11  8:34 ` [PATCH 1/2] " Andy Shevchenko
2024-11-12 14:38   ` Ruhl, Michael J
2024-11-12 15:27     ` Andy Shevchenko

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