From 7c8f486ae7fe90d7bb99a70a42d71c9a40688ec2 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@sunset.davemloft.net>
Date: Mon, 13 Feb 2006 21:50:27 -0800
Subject: [PATCH] [SPARC64]: Fix IOMMU mapping on sun4v.
We should dynamically allocate the per-cpu pglist not use
an in-kernel-image datum, since __pa() does not work on
such addresses.
Also, consistently use "u32" for devhandle.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
arch/sparc64/kernel/pci_sun4v.c | 76 ++++++++++++++++++++-------------
1 file changed, 46 insertions(+), 30 deletions(-)
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index 17080a61ad6c..ac311d3dbc5c 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -24,10 +24,10 @@
#include "pci_sun4v.h"
-#define PGLIST_NENTS 2048
+#define PGLIST_NENTS (PAGE_SIZE / sizeof(u64))
struct sun4v_pglist {
- u64 pglist[PGLIST_NENTS];
+ u64 *pglist;
};
static DEFINE_PER_CPU(struct sun4v_pglist, iommu_pglists);
@@ -83,10 +83,11 @@ static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr
{
struct pcidev_cookie *pcp;
struct pci_iommu *iommu;
- unsigned long devhandle, flags, order, first_page, npages, n;
+ unsigned long flags, order, first_page, npages, n;
void *ret;
long entry;
u64 *pglist;
+ u32 devhandle;
int cpu;
size = IO_PAGE_ALIGN(size);
@@ -123,7 +124,7 @@ static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr
cpu = get_cpu();
- pglist = &__get_cpu_var(iommu_pglists).pglist[0];
+ pglist = __get_cpu_var(iommu_pglists).pglist;
for (n = 0; n < npages; n++)
pglist[n] = first_page + (n * PAGE_SIZE);
@@ -149,7 +150,8 @@ static void pci_4v_free_consistent(struct pci_dev *pdev, size_t size, void *cpu,
{
struct pcidev_cookie *pcp;
struct pci_iommu *iommu;
- unsigned long flags, order, npages, entry, devhandle;
+ unsigned long flags, order, npages, entry;
+ u32 devhandle;
npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
pcp = pdev->sysdata;
@@ -182,8 +184,8 @@ static dma_addr_t pci_4v_map_single(struct pci_dev *pdev, void *ptr, size_t sz,
struct pcidev_cookie *pcp;
struct pci_iommu *iommu;
unsigned long flags, npages, oaddr;
- unsigned long i, base_paddr, devhandle;
- u32 bus_addr, ret;
+ unsigned long i, base_paddr;
+ u32 devhandle, bus_addr, ret;
unsigned long prot;
long entry;
u64 *pglist;
@@ -219,7 +221,7 @@ static dma_addr_t pci_4v_map_single(struct pci_dev *pdev, void *ptr, size_t sz,
cpu = get_cpu();
- pglist = &__get_cpu_var(iommu_pglists).pglist[0];
+ pglist = __get_cpu_var(iommu_pglists).pglist;
for (i = 0; i < npages; i++, base_paddr += IO_PAGE_SIZE)
pglist[i] = base_paddr;
@@ -248,8 +250,9 @@ static void pci_4v_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_
{
struct pcidev_cookie *pcp;
struct pci_iommu *iommu;
- unsigned long flags, npages, devhandle;
+ unsigned long flags, npages;
long entry;
+ u32 devhandle;
if (unlikely(direction == PCI_DMA_NONE)) {
if (printk_ratelimit())
@@ -285,7 +288,7 @@ static void pci_4v_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_
#define SG_ENT_PHYS_ADDRESS(SG) \
(__pa(page_address((SG)->page)) + (SG)->offset)
-static inline void fill_sg(long entry, unsigned long devhandle,
+static inline void fill_sg(long entry, u32 devhandle,
struct scatterlist *sg,
int nused, int nelems, unsigned long prot)
{
@@ -295,7 +298,7 @@ static inline void fill_sg(long entry, unsigned long devhandle,
u64 *pglist;
cpu = get_cpu();
- pglist = &__get_cpu_var(iommu_pglists).pglist[0];
+ pglist = __get_cpu_var(iommu_pglists).pglist;
pglist_ent = 0;
for (i = 0; i < nused; i++) {
unsigned long pteval = ~0UL;
@@ -380,8 +383,8 @@ static int pci_4v_map_sg(struct pci_dev *pdev, struct scatterlist *sglist, int n
{
struct pcidev_cookie *pcp;
struct pci_iommu *iommu;
- unsigned long flags, npages, prot, devhandle;
- u32 dma_base;
+ unsigned long flags, npages, prot;
+ u32 devhandle, dma_base;
struct scatterlist *sgtmp;
long entry;
int used;
@@ -451,9 +454,9 @@ static void pci_4v_unmap_sg(struct pci_dev *pdev, struct scatterlist *sglist, in
{
struct pcidev_cookie *pcp;
struct pci_iommu *iommu;
- unsigned long flags, i, npages, devhandle;
+ unsigned long flags, i, npages;
long entry;
- u32 bus_addr;
+ u32 devhandle, bus_addr;
if (unlikely(direction == PCI_DMA_NONE)) {
if (printk_ratelimit())
@@ -805,7 +808,8 @@ static void probe_existing_entries(struct pci_pbm_info *pbm,
struct pci_iommu *iommu)
{
struct pci_iommu_arena *arena = &iommu->arena;
- unsigned long i, devhandle;
+ unsigned long i;
+ u32 devhandle;
devhandle = pbm->devhandle;
for (i = 0; i < arena->limit; i++) {
@@ -906,7 +910,7 @@ static void pci_sun4v_get_bus_range(struct pci_pbm_info *pbm)
}
-static void pci_sun4v_pbm_init(struct pci_controller_info *p, int prom_node, unsigned int devhandle)
+static void pci_sun4v_pbm_init(struct pci_controller_info *p, int prom_node, u32 devhandle)
{
struct pci_pbm_info *pbm;
int err, i;
@@ -978,7 +982,8 @@ void sun4v_pci_init(int node, char *model_name)
struct pci_controller_info *p;
struct pci_iommu *iommu;
struct linux_prom64_registers regs;
- unsigned int devhandle;
+ u32 devhandle;
+ int i;
prom_getproperty(node, "reg", (char *)®s, sizeof(regs));
devhandle = (regs.phys_addr >> 32UL) & 0x0fffffff;
@@ -999,26 +1004,32 @@ void sun4v_pci_init(int node, char *model_name)
}
}
- p = kmalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
- if (!p) {
- prom_printf("SUN4V_PCI: Fatal memory allocation error.\n");
- prom_halt();
+ for (i = 0; i < NR_CPUS; i++) {
+ unsigned long page = get_zeroed_page(GFP_ATOMIC);
+
+ if (!page)
+ goto fatal_memory_error;
+
+ per_cpu(iommu_pglists, i).pglist = (u64 *) page;
}
+
+ p = kmalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
+ if (!p)
+ goto fatal_memory_error;
+
memset(p, 0, sizeof(*p));
iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC);
- if (!iommu) {
- prom_printf("SCHIZO: Fatal memory allocation error.\n");
- prom_halt();
- }
+ if (!iommu)
+ goto fatal_memory_error;
+
memset(iommu, 0, sizeof(*iommu));
p->pbm_A.iommu = iommu;
iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC);
- if (!iommu) {
- prom_printf("SCHIZO: Fatal memory allocation error.\n");
- prom_halt();
- }
+ if (!iommu)
+ goto fatal_memory_error;
+
memset(iommu, 0, sizeof(*iommu));
p->pbm_B.iommu = iommu;
@@ -1040,4 +1051,9 @@ void sun4v_pci_init(int node, char *model_name)
pci_memspace_mask = 0x7fffffffUL;
pci_sun4v_pbm_init(p, node, devhandle);
+ return;
+
+fatal_memory_error:
+ prom_printf("SUN4V_PCI: Fatal memory allocation error.\n");
+ prom_halt();
}
--
2.20.1