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From: Joerg Roedel <joerg.roedel@amd.com>
To: <iommu@lists.linux-foundation.org>
Cc: <linux-kernel@vger.kernel.org>, Joerg Roedel <joerg.roedel@amd.com>
Subject: [PATCH 24/27] iommu/amd: Make sure irq remapping still works on dma init failure
Date: Wed, 11 Jul 2012 15:39:09 +0200	[thread overview]
Message-ID: <1342013952-10174-25-git-send-email-joerg.roedel@amd.com> (raw)
In-Reply-To: <1342013952-10174-1-git-send-email-joerg.roedel@amd.com>

Do not deinitialize the AMD IOMMU driver completly when
interrupt remapping is already in use but the initialization
of the DMA layer fails for some reason. Make sure the IOMMU
can still be used to remap interrupts.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
 drivers/iommu/amd_iommu_init.c |   40 +++++++++++++++++++++++++++++++---------
 1 file changed, 31 insertions(+), 9 deletions(-)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index d195d22..8140fd2 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1399,6 +1399,16 @@ static void init_device_table_dma(void)
 	}
 }
 
+static void __init uninit_device_table_dma(void)
+{
+	u32 devid;
+
+	for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
+		amd_iommu_dev_table[devid].data[0] = 0ULL;
+		amd_iommu_dev_table[devid].data[1] = 0ULL;
+	}
+}
+
 static void init_device_table(void)
 {
 	u32 devid;
@@ -1567,11 +1577,6 @@ static void __init free_on_init_error(void)
 
 	}
 
-	amd_iommu_uninit_devices();
-
-	free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
-		   get_order(MAX_DOMAIN_ID/8));
-
 	free_pages((unsigned long)amd_iommu_rlookup_table,
 		   get_order(rlookup_table_size));
 
@@ -1583,8 +1588,6 @@ static void __init free_on_init_error(void)
 
 	free_iommu_all();
 
-	free_unity_maps();
-
 #ifdef CONFIG_GART_IOMMU
 	/*
 	 * We failed to initialize the AMD IOMMU - try fallback to GART
@@ -1612,6 +1615,16 @@ static bool __init check_ioapic_information(void)
 	return true;
 }
 
+static void __init free_dma_resources(void)
+{
+	amd_iommu_uninit_devices();
+
+	free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
+		   get_order(MAX_DOMAIN_ID/8));
+
+	free_unity_maps();
+}
+
 /*
  * This is the hardware init function for AMD IOMMU in the system.
  * This function is called either from amd_iommu_init or from the interrupt
@@ -1949,8 +1962,17 @@ static int __init amd_iommu_init(void)
 
 	ret = iommu_go_to_state(IOMMU_INITIALIZED);
 	if (ret) {
-		disable_iommus();
-		free_on_init_error();
+		free_dma_resources();
+		if (!irq_remapping_enabled) {
+			disable_iommus();
+			free_on_init_error();
+		} else {
+			struct amd_iommu *iommu;
+
+			uninit_device_table_dma();
+			for_each_iommu(iommu)
+				iommu_flush_all_caches(iommu);
+		}
 	}
 
 	return ret;
-- 
1.7.9.5



WARNING: multiple messages have this Message-ID
From: Joerg Roedel <joerg.roedel-5C7GfCeVMHo@public.gmane.org>
To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 24/27] iommu/amd: Make sure irq remapping still works on dma init failure
Date: Wed, 11 Jul 2012 15:39:09 +0200	[thread overview]
Message-ID: <1342013952-10174-25-git-send-email-joerg.roedel@amd.com> (raw)
In-Reply-To: <1342013952-10174-1-git-send-email-joerg.roedel-5C7GfCeVMHo@public.gmane.org>

Do not deinitialize the AMD IOMMU driver completly when
interrupt remapping is already in use but the initialization
of the DMA layer fails for some reason. Make sure the IOMMU
can still be used to remap interrupts.

Signed-off-by: Joerg Roedel <joerg.roedel-5C7GfCeVMHo@public.gmane.org>
---
 drivers/iommu/amd_iommu_init.c |   40 +++++++++++++++++++++++++++++++---------
 1 file changed, 31 insertions(+), 9 deletions(-)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index d195d22..8140fd2 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1399,6 +1399,16 @@ static void init_device_table_dma(void)
 	}
 }
 
+static void __init uninit_device_table_dma(void)
+{
+	u32 devid;
+
+	for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
+		amd_iommu_dev_table[devid].data[0] = 0ULL;
+		amd_iommu_dev_table[devid].data[1] = 0ULL;
+	}
+}
+
 static void init_device_table(void)
 {
 	u32 devid;
@@ -1567,11 +1577,6 @@ static void __init free_on_init_error(void)
 
 	}
 
-	amd_iommu_uninit_devices();
-
-	free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
-		   get_order(MAX_DOMAIN_ID/8));
-
 	free_pages((unsigned long)amd_iommu_rlookup_table,
 		   get_order(rlookup_table_size));
 
@@ -1583,8 +1588,6 @@ static void __init free_on_init_error(void)
 
 	free_iommu_all();
 
-	free_unity_maps();
-
 #ifdef CONFIG_GART_IOMMU
 	/*
 	 * We failed to initialize the AMD IOMMU - try fallback to GART
@@ -1612,6 +1615,16 @@ static bool __init check_ioapic_information(void)
 	return true;
 }
 
+static void __init free_dma_resources(void)
+{
+	amd_iommu_uninit_devices();
+
+	free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
+		   get_order(MAX_DOMAIN_ID/8));
+
+	free_unity_maps();
+}
+
 /*
  * This is the hardware init function for AMD IOMMU in the system.
  * This function is called either from amd_iommu_init or from the interrupt
@@ -1949,8 +1962,17 @@ static int __init amd_iommu_init(void)
 
 	ret = iommu_go_to_state(IOMMU_INITIALIZED);
 	if (ret) {
-		disable_iommus();
-		free_on_init_error();
+		free_dma_resources();
+		if (!irq_remapping_enabled) {
+			disable_iommus();
+			free_on_init_error();
+		} else {
+			struct amd_iommu *iommu;
+
+			uninit_device_table_dma();
+			for_each_iommu(iommu)
+				iommu_flush_all_caches(iommu);
+		}
 	}
 
 	return ret;
-- 
1.7.9.5

  parent reply	other threads:[~2012-07-11 13:40 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-11 13:38 [PATCH 0/27] AMD IOMMU interrupt remapping support v2 Joerg Roedel
2012-07-11 13:38 ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 01/27] x86/irq: Add data structure to keep AMD specific irq remapping information Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 21:42   ` Yinghai Lu
2012-07-11 21:42     ` Yinghai Lu
2012-07-12 15:40     ` Joerg Roedel
2012-07-12 15:40       ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 02/27] x86/irq: Introduce irq_cfg->remapped Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 03/27] iommu/amd: Fix sparse warnings Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-17 10:44   ` Joerg Roedel
2012-07-17 10:44     ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 04/27] iommu/amd: Use acpi_get_table instead of acpi_table_parse Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 05/27] iommu/amd: Split out PCI related parts of IOMMU initialization Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 06/27] iommu/amd: Move informational prinks out of iommu_enable Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 07/27] iommu/amd: Introduce early_amd_iommu_init routine Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 08/27] iommu/amd: Split enable_iommus() routine Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 09/27] iommu/amd: Move unmap_flush message to amd_iommu_init_dma_ops() Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 10/27] iommu/amd: Introduce amd_iommu_init_dma routine Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 11/27] iommu/amd: Convert iommu initialization to state machine Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 12/27] iommu/amd: Keep track of HPET and IOAPIC device ids Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 13/27] iommu/amd: Add slab-cache for irq remapping tables Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:38 ` [PATCH 14/27] iommu/amd: Allocate data structures to keep track of " Joerg Roedel
2012-07-11 13:38   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 15/27] iommu/amd: Check if IOAPIC information is correct Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 16/27] iommu/amd: Split device table initialization into irq and dma part Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 17/27] iommu/amd: Make sure IOMMU is not considered to translate itself Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 18/27] iommu/amd: Add IRTE invalidation routine Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 19/27] iommu/amd: Add routines to manage irq remapping tables Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 20/27] iommu/amd: Add IOAPIC remapping routines Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 21/27] iommu/amd: Implement MSI routines for interrupt remapping Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 22/27] iommu/amd: Add call-back routine for HPET MSI Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 23/27] iommu/amd: Add initialization routines for AMD interrupt remapping Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` Joerg Roedel [this message]
2012-07-11 13:39   ` [PATCH 24/27] iommu/amd: Make sure irq remapping still works on dma init failure Joerg Roedel
2012-07-11 13:39 ` [PATCH 25/27] iommu/irq: Use amd_iommu_irq_ops if supported Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 26/27] iommu/amd: Print message to system log when irq remapping is enabled Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel
2012-07-11 13:39 ` [PATCH 27/27] iommu/amd: Report irq remapping through IOMMU-API Joerg Roedel
2012-07-11 13:39   ` Joerg Roedel

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