From: Philipp Stanner <pstanner@redhat.com>
To: Hans de Goede <hdegoede@redhat.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
Bjorn Helgaas <bhelgaas@google.com>,
Sam Ravnborg <sam@ravnborg.org>,
dakr@redhat.com
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org, Philipp Stanner <pstanner@redhat.com>
Subject: [PATCH v5 06/10] PCI: Move pinned status bit to struct pci_dev
Date: Wed, 3 Apr 2024 10:07:07 +0200 [thread overview]
Message-ID: <20240403080712.13986-9-pstanner@redhat.com> (raw)
In-Reply-To: <20240403080712.13986-2-pstanner@redhat.com>
The bit describing whether the PCI device is currently pinned is stored
in struct pci_devres. To clean up and simplify the PCI devres API, it's
better if this information is stored in struct pci_dev, because it
allows for checking that device's pinned-status directly through
struct pci_dev.
This will later permit simplifying pcim_enable_device().
Move the 'pinned' boolean bit to struct pci_dev.
Restructure bits in struct pci_dev so the pm / pme fields are next to
each other.
Signed-off-by: Philipp Stanner <pstanner@redhat.com>
---
drivers/pci/devres.c | 14 ++++----------
drivers/pci/pci.h | 1 -
include/linux/pci.h | 5 +++--
3 files changed, 7 insertions(+), 13 deletions(-)
diff --git a/drivers/pci/devres.c b/drivers/pci/devres.c
index 6bf93c6cbb66..076362740791 100644
--- a/drivers/pci/devres.c
+++ b/drivers/pci/devres.c
@@ -403,7 +403,7 @@ static void pcim_release(struct device *gendev, void *res)
if (this->restore_intx)
pci_intx(dev, this->orig_intx);
- if (!this->pinned)
+ if (!dev->pinned)
pci_disable_device(dev);
}
@@ -459,18 +459,12 @@ EXPORT_SYMBOL(pcim_enable_device);
* pcim_pin_device - Pin managed PCI device
* @pdev: PCI device to pin
*
- * Pin managed PCI device @pdev. Pinned device won't be disabled on
- * driver detach. @pdev must have been enabled with
- * pcim_enable_device().
+ * Pin managed PCI device @pdev. Pinned device won't be disabled on driver
+ * detach. @pdev must have been enabled with pcim_enable_device().
*/
void pcim_pin_device(struct pci_dev *pdev)
{
- struct pci_devres *dr;
-
- dr = find_pci_dr(pdev);
- WARN_ON(!dr || !pdev->enabled);
- if (dr)
- dr->pinned = 1;
+ pdev->pinned = true;
}
EXPORT_SYMBOL(pcim_pin_device);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 2b6c0df133bf..a080efd69e85 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -823,7 +823,6 @@ static inline pci_power_t mid_pci_get_power_state(struct pci_dev *pdev)
* then remove them from here.
*/
struct pci_devres {
- unsigned int pinned:1;
unsigned int orig_intx:1;
unsigned int restore_intx:1;
unsigned int mwi:1;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 95cdd1bc73c4..9d85d2181083 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -367,11 +367,12 @@ struct pci_dev {
this is D0-D3, D0 being fully
functional, and D3 being off. */
u8 pm_cap; /* PM capability offset */
- unsigned int enabled:1; /* Whether this dev is enabled */
- unsigned int imm_ready:1; /* Supports Immediate Readiness */
unsigned int pme_support:5; /* Bitmask of states from which PME#
can be generated */
unsigned int pme_poll:1; /* Poll device's PME status bit */
+ unsigned int enabled:1; /* Whether this dev is enabled */
+ unsigned int pinned:1; /* Whether this dev is pinned */
+ unsigned int imm_ready:1; /* Supports Immediate Readiness */
unsigned int d1_support:1; /* Low power state D1 is supported */
unsigned int d2_support:1; /* Low power state D2 is supported */
unsigned int no_d1d2:1; /* D1 and D2 are forbidden */
--
2.44.0
next prev parent reply other threads:[~2024-04-03 8:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-03 8:07 [PATCH v5 00/10] Make PCI's devres API more consistent Philipp Stanner
2024-04-03 8:07 ` [PATCH v5 01/10] PCI: Add new set of devres functions Philipp Stanner
2024-04-03 8:07 ` [PATCH v5 02/10] PCI: Deprecate iomap-table functions Philipp Stanner
2024-04-04 6:29 ` Dan Carpenter
2024-04-04 7:15 ` Philipp Stanner
2024-04-03 8:07 ` [PATCH v5 03/10] PCI: Warn users about complicated devres nature Philipp Stanner
2024-04-03 8:07 ` [PATCH v5 04/10] PCI: Make devres region requests consistent Philipp Stanner
2024-04-03 8:07 ` [PATCH v5 05/10] PCI: Move dev-enabled status bit to struct pci_dev Philipp Stanner
2024-04-03 8:07 ` Philipp Stanner [this message]
2024-04-03 8:07 ` [PATCH v5 07/10] PCI: Give pcim_set_mwi() its own devres callback Philipp Stanner
2024-04-03 8:07 ` [PATCH v5 08/10] PCI: Give pci(m)_intx " Philipp Stanner
2024-04-03 8:07 ` [PATCH v5 09/10] PCI: Remove legacy pcim_release() Philipp Stanner
2024-04-03 8:07 ` [PATCH v5 10/10] drm/vboxvideo: fix mapping leaks Philipp Stanner
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