Provide support for PCI I/O instructions that work on mapped IO addresses.
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
#define ioremap_wc ioremap_nocache
#define ioremap_wt ioremap_nocache
-static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
-{
- return (void __iomem *) offset;
-}
-
-static inline void iounmap(volatile void __iomem *addr)
-{
-}
+void __iomem *ioremap(unsigned long offset, unsigned long size);
+void iounmap(volatile void __iomem *addr);
static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
* the corresponding device and create the mapping cookie.
*/
#define pci_iomap pci_iomap
+#define pci_iomap_range pci_iomap_range
#define pci_iounmap pci_iounmap
-#define pci_iomap_wc pci_iomap
-#define pci_iomap_wc_range pci_iomap_range
+#define pci_iomap_wc pci_iomap_wc
+#define pci_iomap_wc_range pci_iomap_wc_range
#define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count)
#define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count)
#define memset_io(dst, val, count) zpci_memset_io(dst, val, count)
+#define mmiowb() zpci_barrier()
+
#define __raw_readb zpci_read_u8
#define __raw_readw zpci_read_u16
#define __raw_readl zpci_read_u32
struct zpci_bar_struct {
struct resource *res; /* bus resource */
+ void __iomem *mio_wb;
+ void __iomem *mio_wt;
u32 val; /* bar start & 3 flag bits */
u16 map_idx; /* index into bar mapping array */
u8 size; /* order 2 exponent */
struct iommu_device iommu_dev; /* IOMMU core handle */
char res_name[16];
+ bool mio_capable;
struct zpci_bar_struct bars[PCI_BAR_COUNT];
u64 start_dma; /* Start of available DMA addresses */
#define CLP_SET_ENABLE_PCI_FN 0 /* Yes, 0 enables it */
#define CLP_SET_DISABLE_PCI_FN 1 /* Yes, 1 disables it */
+#define CLP_SET_ENABLE_MIO 2
+#define CLP_SET_DISABLE_MIO 3
#define CLP_UTIL_STR_LEN 64
#define CLP_PFIP_NR_SEGMENTS 4
struct clp_rsp_query_pci {
struct clp_rsp_hdr hdr;
u16 vfn; /* virtual fn number */
- u16 : 7;
+ u16 : 6;
+ u16 mio_addr_avail : 1;
u16 util_str_avail : 1; /* utility string available? */
u16 pfgid : 8; /* pci function group id */
u32 fid; /* pci function id */
u32 reserved[11];
u32 uid; /* user defined id */
u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
+ u32 reserved2[16];
+ u32 mio_valid : 6;
+ u32 : 26;
+ u32 : 32;
+ struct {
+ u64 wb;
+ u64 wt;
+ } addr[PCI_BAR_COUNT];
+ u32 reserved3[6];
} __packed;
/* Query PCI function group request */
#ifndef _ASM_S390_PCI_INSN_H
#define _ASM_S390_PCI_INSN_H
+#include <linux/jump_label.h>
+
/* Load/Store status codes */
#define ZPCI_PCI_ST_FUNC_NOT_ENABLED 4
#define ZPCI_PCI_ST_FUNC_IN_ERR 8
struct zpci_cdiib cdiib;
};
+DECLARE_STATIC_KEY_FALSE(have_mio);
+
u8 zpci_mod_fc(u64 req, struct zpci_fib *fib, u8 *status);
int zpci_refresh_trans(u64 fn, u64 addr, u64 range);
int __zpci_load(u64 *data, u64 req, u64 offset);
int __zpci_store(u64 data, u64 req, u64 offset);
int zpci_store(const volatile void __iomem *addr, u64 data, unsigned long len);
int __zpci_store_block(const u64 *data, u64 req, u64 offset);
+void zpci_barrier(void);
int __zpci_set_irq_ctrl(u16 ctl, u8 isc, union zpci_sic_iib *iib);
static inline int zpci_set_irq_ctrl(u16 ctl, u8 isc)
#include <linux/export.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
+#include <linux/jump_label.h>
#include <linux/pci.h>
#include <asm/isc.h>
struct zpci_iomap_entry *zpci_iomap_start;
EXPORT_SYMBOL_GPL(zpci_iomap_start);
+DEFINE_STATIC_KEY_FALSE(have_mio);
+
static struct kmem_cache *zdev_fmb_cache;
struct zpci_dev *get_zdev_by_fid(u32 fid)
zpci_memcpy_toio(to, from, count);
}
+void __iomem *ioremap(unsigned long ioaddr, unsigned long size)
+{
+ struct vm_struct *area;
+ unsigned long offset;
+
+ if (!size)
+ return NULL;
+
+ if (!static_branch_unlikely(&have_mio))
+ return (void __iomem *) ioaddr;
+
+ offset = ioaddr & ~PAGE_MASK;
+ ioaddr &= PAGE_MASK;
+ size = PAGE_ALIGN(size + offset);
+ area = get_vm_area(size, VM_IOREMAP);
+ if (!area)
+ return NULL;
+
+ if (ioremap_page_range((unsigned long) area->addr,
+ (unsigned long) area->addr + size,
+ ioaddr, PAGE_KERNEL)) {
+ vunmap(area->addr);
+ return NULL;
+ }
+ return (void __iomem *) ((unsigned long) area->addr + offset);
+}
+EXPORT_SYMBOL(ioremap);
+
+void iounmap(volatile void __iomem *addr)
+{
+ if (static_branch_likely(&have_mio))
+ vunmap((__force void *) ((unsigned long) addr & PAGE_MASK));
+}
+EXPORT_SYMBOL(iounmap);
+
/* Create a virtual mapping cookie for a PCI BAR */
-void __iomem *pci_iomap_range(struct pci_dev *pdev,
- int bar,
- unsigned long offset,
- unsigned long max)
+static void __iomem *pci_iomap_range_fh(struct pci_dev *pdev, int bar,
+ unsigned long offset, unsigned long max)
{
struct zpci_dev *zdev = to_zpci(pdev);
int idx;
- if (!pci_resource_len(pdev, bar) || bar >= PCI_BAR_COUNT)
- return NULL;
-
idx = zdev->bars[bar].map_idx;
spin_lock(&zpci_iomap_lock);
/* Detect overrun */
return (void __iomem *) ZPCI_ADDR(idx) + offset;
}
+
+static void __iomem *pci_iomap_range_mio(struct pci_dev *pdev, int bar,
+ unsigned long offset,
+ unsigned long max)
+{
+ unsigned long barsize = pci_resource_len(pdev, bar);
+ struct zpci_dev *zdev = to_zpci(pdev);
+ void __iomem *iova;
+
+ iova = ioremap((unsigned long) zdev->bars[bar].mio_wt, barsize);
+ return iova ? iova + offset : iova;
+}
+
+void __iomem *pci_iomap_range(struct pci_dev *pdev, int bar,
+ unsigned long offset, unsigned long max)
+{
+ if (!pci_resource_len(pdev, bar) || bar >= PCI_BAR_COUNT)
+ return NULL;
+
+ if (static_branch_likely(&have_mio))
+ return pci_iomap_range_mio(pdev, bar, offset, max);
+ else
+ return pci_iomap_range_fh(pdev, bar, offset, max);
+}
EXPORT_SYMBOL(pci_iomap_range);
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
}
EXPORT_SYMBOL(pci_iomap);
-void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
+static void __iomem *pci_iomap_wc_range_mio(struct pci_dev *pdev, int bar,
+ unsigned long offset, unsigned long max)
+{
+ unsigned long barsize = pci_resource_len(pdev, bar);
+ struct zpci_dev *zdev = to_zpci(pdev);
+ void __iomem *iova;
+
+ iova = ioremap((unsigned long) zdev->bars[bar].mio_wb, barsize);
+ return iova ? iova + offset : iova;
+}
+
+void __iomem *pci_iomap_wc_range(struct pci_dev *pdev, int bar,
+ unsigned long offset, unsigned long max)
+{
+ if (!pci_resource_len(pdev, bar) || bar >= PCI_BAR_COUNT)
+ return NULL;
+
+ if (static_branch_likely(&have_mio))
+ return pci_iomap_wc_range_mio(pdev, bar, offset, max);
+ else
+ return pci_iomap_range_fh(pdev, bar, offset, max);
+}
+EXPORT_SYMBOL(pci_iomap_wc_range);
+
+void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long maxlen)
+{
+ return pci_iomap_wc_range(dev, bar, 0, maxlen);
+}
+EXPORT_SYMBOL(pci_iomap_wc);
+
+static void pci_iounmap_fh(struct pci_dev *pdev, void __iomem *addr)
{
unsigned int idx = ZPCI_IDX(addr);
}
spin_unlock(&zpci_iomap_lock);
}
+
+static void pci_iounmap_mio(struct pci_dev *pdev, void __iomem *addr)
+{
+ iounmap(addr);
+}
+
+void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
+{
+ if (static_branch_likely(&have_mio))
+ pci_iounmap_mio(pdev, addr);
+ else
+ pci_iounmap_fh(pdev, addr);
+}
EXPORT_SYMBOL(pci_iounmap);
static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
static void zpci_map_resources(struct pci_dev *pdev)
{
+ struct zpci_dev *zdev = to_zpci(pdev);
resource_size_t len;
int i;
len = pci_resource_len(pdev, i);
if (!len)
continue;
- pdev->resource[i].start =
- (resource_size_t __force) pci_iomap(pdev, i, 0);
+
+ if (static_branch_likely(&have_mio))
+ pdev->resource[i].start =
+ (resource_size_t __force) zdev->bars[i].mio_wb;
+ else
+ pdev->resource[i].start =
+ (resource_size_t __force) pci_iomap(pdev, i, 0);
pdev->resource[i].end = pdev->resource[i].start + len - 1;
}
resource_size_t len;
int i;
+ if (static_branch_likely(&have_mio))
+ return;
+
for (i = 0; i < PCI_BAR_COUNT; i++) {
len = pci_resource_len(pdev, i);
if (!len)
if (!test_facility(69) || !test_facility(71))
return 0;
+ if (test_facility(153))
+ static_branch_enable(&have_mio);
+
rc = zpci_debug_init();
if (rc)
goto out;
memcpy(zdev->util_str, response->util_str,
sizeof(zdev->util_str));
}
+ zdev->mio_capable = response->mio_addr_avail;
+ for (i = 0; i < PCI_BAR_COUNT; i++) {
+ if (!(response->mio_valid & (1 << (PCI_BAR_COUNT - i - 1))))
+ continue;
+ zdev->bars[i].mio_wb = (void __iomem *) response->addr[i].wb;
+ zdev->bars[i].mio_wt = (void __iomem *) response->addr[i].wt;
+ }
return 0;
}
int rc;
rc = clp_set_pci_fn(&fh, nr_dma_as, CLP_SET_ENABLE_PCI_FN);
- if (!rc)
- /* Success -> store enabled handle in zdev */
- zdev->fh = fh;
+ zpci_dbg(3, "ena fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
+ if (rc)
+ goto out;
- zpci_dbg(3, "ena fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
+ zdev->fh = fh;
+ if (zdev->mio_capable) {
+ rc = clp_set_pci_fn(&fh, nr_dma_as, CLP_SET_ENABLE_MIO);
+ zpci_dbg(3, "ena mio fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
+ if (rc)
+ clp_disable_fh(zdev);
+ }
+out:
return rc;
}
return 0;
rc = clp_set_pci_fn(&fh, 0, CLP_SET_DISABLE_PCI_FN);
+ zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, fh, rc);
if (!rc)
- /* Success -> store disabled handle in zdev */
zdev->fh = fh;
- zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
return rc;
}
#include <linux/export.h>
#include <linux/errno.h>
#include <linux/delay.h>
+#include <linux/jump_label.h>
#include <asm/facility.h>
#include <asm/pci_insn.h>
#include <asm/pci_debug.h>
}
EXPORT_SYMBOL_GPL(__zpci_load);
-int zpci_load(u64 *data, const volatile void __iomem *addr, unsigned long len)
+static inline int zpci_load_fh(u64 *data, const volatile void __iomem *addr,
+ unsigned long len)
{
struct zpci_iomap_entry *entry = &zpci_iomap_start[ZPCI_IDX(addr)];
u64 req = ZPCI_CREATE_REQ(entry->fh, entry->bar, len);
return __zpci_load(data, req, ZPCI_OFFSET(addr));
}
+
+static inline int __pcilg_mio(u64 *data, u64 ioaddr, u64 len, u8 *status)
+{
+ register u64 addr asm("2") = ioaddr;
+ register u64 r3 asm("3") = len;
+ int cc = -ENXIO;
+ u64 __data;
+
+ asm volatile (
+ " .insn rre,0xb9d60000,%[data],%[ioaddr]\n"
+ "0: ipm %[cc]\n"
+ " srl %[cc],28\n"
+ "1:\n"
+ EX_TABLE(0b, 1b)
+ : [cc] "+d" (cc), [data] "=d" (__data), "+d" (r3)
+ : [ioaddr] "d" (addr)
+ : "cc");
+ *status = r3 >> 24 & 0xff;
+ *data = __data;
+ return cc;
+}
+
+int zpci_load(u64 *data, const volatile void __iomem *addr, unsigned long len)
+{
+ u8 status;
+ int cc;
+
+ if (!static_branch_unlikely(&have_mio))
+ return zpci_load_fh(data, addr, len);
+
+ cc = __pcilg_mio(data, (__force u64) addr, len, &status);
+ if (cc)
+ zpci_err_insn(cc, status, 0, (__force u64) addr);
+
+ return (cc > 0) ? -EIO : cc;
+}
EXPORT_SYMBOL_GPL(zpci_load);
/* PCI Store */
}
EXPORT_SYMBOL_GPL(__zpci_store);
-int zpci_store(const volatile void __iomem *addr, u64 data, unsigned long len)
+static inline int zpci_store_fh(const volatile void __iomem *addr, u64 data,
+ unsigned long len)
{
struct zpci_iomap_entry *entry = &zpci_iomap_start[ZPCI_IDX(addr)];
u64 req = ZPCI_CREATE_REQ(entry->fh, entry->bar, len);
return __zpci_store(data, req, ZPCI_OFFSET(addr));
}
+
+static inline int __pcistg_mio(u64 data, u64 ioaddr, u64 len, u8 *status)
+{
+ register u64 addr asm("2") = ioaddr;
+ register u64 r3 asm("3") = len;
+ int cc = -ENXIO;
+
+ asm volatile (
+ " .insn rre,0xb9d40000,%[data],%[ioaddr]\n"
+ "0: ipm %[cc]\n"
+ " srl %[cc],28\n"
+ "1:\n"
+ EX_TABLE(0b, 1b)
+ : [cc] "+d" (cc), "+d" (r3)
+ : [data] "d" (data), [ioaddr] "d" (addr)
+ : "cc");
+ *status = r3 >> 24 & 0xff;
+ return cc;
+}
+
+int zpci_store(const volatile void __iomem *addr, u64 data, unsigned long len)
+{
+ u8 status;
+ int cc;
+
+ if (!static_branch_unlikely(&have_mio))
+ return zpci_store_fh(addr, data, len);
+
+ cc = __pcistg_mio(data, (__force u64) addr, len, &status);
+ if (cc)
+ zpci_err_insn(cc, status, 0, (__force u64) addr);
+
+ return (cc > 0) ? -EIO : cc;
+}
EXPORT_SYMBOL_GPL(zpci_store);
/* PCI Store Block */
}
EXPORT_SYMBOL_GPL(__zpci_store_block);
-int zpci_write_block(volatile void __iomem *dst,
- const void *src, unsigned long len)
+static inline int zpci_write_block_fh(volatile void __iomem *dst,
+ const void *src, unsigned long len)
{
struct zpci_iomap_entry *entry = &zpci_iomap_start[ZPCI_IDX(dst)];
u64 req = ZPCI_CREATE_REQ(entry->fh, entry->bar, len);
return __zpci_store_block(src, req, offset);
}
+
+static inline int __pcistb_mio(const u64 *data, u64 ioaddr, u64 len, u8 *status)
+{
+ int cc = -ENXIO;
+
+ asm volatile (
+ " .insn rsy,0xeb00000000d4,%[len],%[ioaddr],%[data]\n"
+ "0: ipm %[cc]\n"
+ " srl %[cc],28\n"
+ "1:\n"
+ EX_TABLE(0b, 1b)
+ : [cc] "+d" (cc), [len] "+d" (len)
+ : [ioaddr] "d" (ioaddr), [data] "Q" (*data)
+ : "cc");
+ *status = len >> 24 & 0xff;
+ return cc;
+}
+
+int zpci_write_block(volatile void __iomem *dst,
+ const void *src, unsigned long len)
+{
+ u8 status;
+ int cc;
+
+ if (!static_branch_unlikely(&have_mio))
+ return zpci_write_block_fh(dst, src, len);
+
+ cc = __pcistb_mio(src, (__force u64) dst, len, &status);
+ if (cc)
+ zpci_err_insn(cc, status, 0, (__force u64) dst);
+
+ return (cc > 0) ? -EIO : cc;
+}
EXPORT_SYMBOL_GPL(zpci_write_block);
+
+static inline void __pciwb_mio(void)
+{
+ unsigned long unused = 0;
+
+ asm volatile (".insn rre,0xb9d50000,%[op],%[op]\n"
+ : [op] "+d" (unused));
+}
+
+void zpci_barrier(void)
+{
+ if (static_branch_likely(&have_mio))
+ __pciwb_mio();
+}
+EXPORT_SYMBOL_GPL(zpci_barrier);
projects / openwrt / staging / blogic.git / commitdiff