From: Jiang Liu <jiang.liu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Yinghai Lu <yinghai@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vinod.koul@intel.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>,
Ashok Raj <ashok.raj@intel.com>,
Yijing Wang <wangyijing@huawei.com>,
Tony Luck <tony.luck@intel.com>,
iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org,
linux-hotplug@vger.kernel.org, linux-kernel@vger.kernel.org,
dmaengine@vger.kernel.org
Subject: [Patch Part3 V6 8/8] pci, ACPI, iommu: Enhance pci_root to support DMAR device hotplug
Date: Fri, 19 Sep 2014 13:18:55 +0800 [thread overview]
Message-ID: <1411103935-31301-9-git-send-email-jiang.liu@linux.intel.com> (raw)
In-Reply-To: <1411103935-31301-1-git-send-email-jiang.liu@linux.intel.com>
Finally enhance pci_root driver to support DMAR device hotplug when
hot-plugging PCI host bridges.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: Yijing Wang <wangyijing@huawei.com>
---
drivers/acpi/pci_root.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index e6ae603ed1a1..4e177daa18e3 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -33,6 +33,7 @@
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/pci-aspm.h>
+#include <linux/dmar.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <acpi/apei.h> /* for acpi_hest_init() */
@@ -511,6 +512,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
struct acpi_pci_root *root;
acpi_handle handle = device->handle;
int no_aspm = 0, clear_aspm = 0;
+ bool hotadd = system_state != SYSTEM_BOOTING;
root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
if (!root)
@@ -557,6 +559,11 @@ static int acpi_pci_root_add(struct acpi_device *device,
strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
device->driver_data = root;
+ if (hotadd && dmar_device_add(handle)) {
+ result = -ENXIO;
+ goto end;
+ }
+
pr_info(PREFIX "%s [%s] (domain %04x %pR)\n",
acpi_device_name(device), acpi_device_bid(device),
root->segment, &root->secondary);
@@ -583,7 +590,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
root->segment, (unsigned int)root->secondary.start);
device->driver_data = NULL;
result = -ENODEV;
- goto end;
+ goto remove_dmar;
}
if (clear_aspm) {
@@ -597,7 +604,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
if (device->wakeup.flags.run_wake)
device_set_run_wake(root->bus->bridge, true);
- if (system_state != SYSTEM_BOOTING) {
+ if (hotadd) {
pcibios_resource_survey_bus(root->bus);
pci_assign_unassigned_root_bus_resources(root->bus);
}
@@ -607,6 +614,9 @@ static int acpi_pci_root_add(struct acpi_device *device,
pci_unlock_rescan_remove();
return 1;
+remove_dmar:
+ if (hotadd)
+ dmar_device_remove(handle);
end:
kfree(root);
return result;
@@ -625,6 +635,8 @@ static void acpi_pci_root_remove(struct acpi_device *device)
pci_remove_root_bus(root->bus);
+ dmar_device_remove(device->handle);
+
pci_unlock_rescan_remove();
kfree(root);
--
1.7.10.4
next prev parent reply other threads:[~2014-09-19 5:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-19 5:18 [Patch Part3 V6 0/8] Enable support of Intel DMAR device hotplug Jiang Liu
2014-09-19 5:18 ` [Patch Part3 V6 1/8] iommu/vt-d: Introduce helper function dmar_walk_resources() Jiang Liu
2014-09-19 6:49 ` Yijing Wang
2014-09-19 5:18 ` [Patch Part3 V6 2/8] iommu/vt-d: Dynamically allocate and free seq_id for DMAR units Jiang Liu
2014-09-19 5:18 ` [Patch Part3 V6 3/8] iommu/vt-d: Implement DMAR unit hotplug framework Jiang Liu
2014-09-19 5:18 ` [Patch Part3 V6 4/8] iommu/vt-d: Search for ACPI _DSM method for DMAR hotplug Jiang Liu
2014-09-19 5:18 ` [Patch Part3 V6 5/8] iommu/vt-d: Enhance intel_irq_remapping driver to support DMAR unit hotplug Jiang Liu
2014-09-19 6:49 ` Yijing Wang
2014-09-19 5:18 ` [Patch Part3 V6 6/8] iommu/vt-d: Enhance error recovery in function intel_enable_irq_remapping() Jiang Liu
2014-09-19 5:18 ` [Patch Part3 V6 7/8] iommu/vt-d: Enhance intel-iommu driver to support DMAR unit hotplug Jiang Liu
2014-09-19 5:18 ` Jiang Liu [this message]
2014-09-24 18:37 ` [Patch Part3 V6 8/8] pci, ACPI, iommu: Enhance pci_root to support DMAR device hotplug Bjorn Helgaas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1411103935-31301-9-git-send-email-jiang.liu@linux.intel.com \
--to=jiang.liu@linux.intel.com \
--cc=ashok.raj@intel.com \
--cc=bhelgaas@google.com \
--cc=dan.j.williams@intel.com \
--cc=dmaengine@vger.kernel.org \
--cc=dwmw2@infradead.org \
--cc=iommu@lists.linux-foundation.org \
--cc=joro@8bytes.org \
--cc=linux-hotplug@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=rafael.j.wysocki@intel.com \
--cc=tony.luck@intel.com \
--cc=vinod.koul@intel.com \
--cc=wangyijing@huawei.com \
--cc=yinghai@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).