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authorKumar Gala <galak@kernel.crashing.org>2009-05-15 00:37:35 -0500
committerKumar Gala <galak@kernel.crashing.org>2009-06-15 21:45:29 -0500
commit152d0182822e871a3fe1f6d97949d83fad950e26 (patch)
tree0e09bbe9b3a5b2982dc501db4240238314f54743
parent5cef379b34ffcd96567066ddc1012bd40e6e7675 (diff)
powerpc/85xx: Add SWIOTLB support to FSL boards
Add the platform-specific code for enabling SWIOTLB if needed on P2020DS, MPC85xx DS, and MPC85xx MDS boards as they are capable of having >4G of memory. We determine if we need to enable swiotlb based on how much memory is in the board and if it exceeds 4G or what we can map via PCI inbound windows. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--arch/powerpc/platforms/85xx/Kconfig3
-rw-r--r--arch/powerpc/platforms/85xx/mpc8536_ds.c17
-rw-r--r--arch/powerpc/platforms/85xx/mpc85xx_ds.c19
-rw-r--r--arch/powerpc/platforms/85xx/mpc85xx_mds.c20
4 files changed, 59 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/85xx/Kconfig b/arch/powerpc/platforms/85xx/Kconfig
index 43d385cedcd..0ee5b12c7d9 100644
--- a/arch/powerpc/platforms/85xx/Kconfig
+++ b/arch/powerpc/platforms/85xx/Kconfig
@@ -35,12 +35,14 @@ config MPC85xx_MDS
select DEFAULT_UIMAGE
select PHYLIB
select HAS_RAPIDIO
+ select SWIOTLB
help
This option enables support for the MPC85xx MDS board
config MPC8536_DS
bool "Freescale MPC8536 DS"
select DEFAULT_UIMAGE
+ select SWIOTLB
help
This option enables support for the MPC8536 DS board
@@ -49,6 +51,7 @@ config MPC85xx_DS
select PPC_I8259
select DEFAULT_UIMAGE
select FSL_ULI1575
+ select SWIOTLB
help
This option enables support for the MPC85xx DS (MPC8544 DS) board
diff --git a/arch/powerpc/platforms/85xx/mpc8536_ds.c b/arch/powerpc/platforms/85xx/mpc8536_ds.c
index 63efca20d7b..055ff417bae 100644
--- a/arch/powerpc/platforms/85xx/mpc8536_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc8536_ds.c
@@ -17,6 +17,7 @@
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/of_platform.h>
+#include <linux/lmb.h>
#include <asm/system.h>
#include <asm/time.h>
@@ -26,6 +27,7 @@
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
+#include <asm/swiotlb.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
@@ -65,7 +67,9 @@ static void __init mpc8536_ds_setup_arch(void)
{
#ifdef CONFIG_PCI
struct device_node *np;
+ struct pci_controller *hose;
#endif
+ dma_addr_t max = 0xffffffff;
if (ppc_md.progress)
ppc_md.progress("mpc8536_ds_setup_arch()", 0);
@@ -80,11 +84,22 @@ static void __init mpc8536_ds_setup_arch(void)
fsl_add_bridge(np, 1);
else
fsl_add_bridge(np, 0);
+
+ hose = pci_find_hose_for_OF_device(np);
+ max = min(max, hose->dma_window_base_cur +
+ hose->dma_window_size);
}
}
#endif
+#ifdef CONFIG_SWIOTLB
+ if (lmb_end_of_DRAM() > max) {
+ ppc_swiotlb_enable = 1;
+ set_pci_dma_ops(&swiotlb_pci_dma_ops);
+ }
+#endif
+
printk("MPC8536 DS board from Freescale Semiconductor\n");
}
@@ -102,6 +117,8 @@ static int __init mpc8536_ds_publish_devices(void)
}
machine_device_initcall(mpc8536_ds, mpc8536_ds_publish_devices);
+machine_arch_initcall(mpc8536_ds, swiotlb_setup_bus_notifier);
+
/*
* Called very early, device-tree isn't unflattened
*/
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ds.c b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
index 53d5851a6c9..849c0ac0025 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
@@ -20,6 +20,7 @@
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/of_platform.h>
+#include <linux/lmb.h>
#include <asm/system.h>
#include <asm/time.h>
@@ -30,6 +31,7 @@
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <asm/i8259.h>
+#include <asm/swiotlb.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
@@ -155,7 +157,9 @@ static void __init mpc85xx_ds_setup_arch(void)
{
#ifdef CONFIG_PCI
struct device_node *np;
+ struct pci_controller *hose;
#endif
+ dma_addr_t max = 0xffffffff;
if (ppc_md.progress)
ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
@@ -171,6 +175,10 @@ static void __init mpc85xx_ds_setup_arch(void)
fsl_add_bridge(np, 1);
else
fsl_add_bridge(np, 0);
+
+ hose = pci_find_hose_for_OF_device(np);
+ max = min(max, hose->dma_window_base_cur +
+ hose->dma_window_size);
}
}
@@ -181,6 +189,13 @@ static void __init mpc85xx_ds_setup_arch(void)
mpc85xx_smp_init();
#endif
+#ifdef CONFIG_SWIOTLB
+ if (lmb_end_of_DRAM() > max) {
+ ppc_swiotlb_enable = 1;
+ set_pci_dma_ops(&swiotlb_pci_dma_ops);
+ }
+#endif
+
printk("MPC85xx DS board from Freescale Semiconductor\n");
}
@@ -217,6 +232,10 @@ machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);
+machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
+machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
+machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
+
/*
* Called very early, device-tree isn't unflattened
*/
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_mds.c b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
index b2c0a431997..77f90b35635 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_mds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
@@ -33,6 +33,7 @@
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include <linux/phy.h>
+#include <linux/lmb.h>
#include <asm/system.h>
#include <asm/atomic.h>
@@ -49,6 +50,7 @@
#include <asm/qe.h>
#include <asm/qe_ic.h>
#include <asm/mpic.h>
+#include <asm/swiotlb.h>
#undef DEBUG
#ifdef DEBUG
@@ -155,6 +157,10 @@ static void __init mpc85xx_mds_setup_arch(void)
{
struct device_node *np;
static u8 __iomem *bcsr_regs = NULL;
+#ifdef CONFIG_PCI
+ struct pci_controller *hose;
+#endif
+ dma_addr_t max = 0xffffffff;
if (ppc_md.progress)
ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
@@ -179,6 +185,10 @@ static void __init mpc85xx_mds_setup_arch(void)
fsl_add_bridge(np, 1);
else
fsl_add_bridge(np, 0);
+
+ hose = pci_find_hose_for_OF_device(np);
+ max = min(max, hose->dma_window_base_cur +
+ hose->dma_window_size);
}
}
#endif
@@ -227,6 +237,13 @@ static void __init mpc85xx_mds_setup_arch(void)
iounmap(bcsr_regs);
}
#endif /* CONFIG_QUICC_ENGINE */
+
+#ifdef CONFIG_SWIOTLB
+ if (lmb_end_of_DRAM() > max) {
+ ppc_swiotlb_enable = 1;
+ set_pci_dma_ops(&swiotlb_pci_dma_ops);
+ }
+#endif
}
@@ -281,6 +298,9 @@ static int __init mpc85xx_publish_devices(void)
machine_device_initcall(mpc8568_mds, mpc85xx_publish_devices);
machine_device_initcall(mpc8569_mds, mpc85xx_publish_devices);
+machine_arch_initcall(mpc8568_mds, swiotlb_setup_bus_notifier);
+machine_arch_initcall(mpc8569_mds, swiotlb_setup_bus_notifier);
+
static void __init mpc85xx_mds_pic_init(void)
{
struct mpic *mpic;