2 * s390 specific pci instructions
4 * Copyright IBM Corp. 2013
7 #include <linux/export.h>
8 #include <linux/errno.h>
9 #include <linux/delay.h>
10 #include <asm/pci_insn.h>
11 #include <asm/processor.h>
13 #define ZPCI_INSN_BUSY_DELAY 1 /* 1 microsecond */
15 /* Modify PCI Function Controls */
16 static inline u8 __mpcifc(u64 req, struct zpci_fib *fib, u8 *status)
21 " .insn rxy,0xe300000000d0,%[req],%[fib]\n"
24 : [cc] "=d" (cc), [req] "+d" (req), [fib] "+Q" (*fib)
26 *status = req >> 24 & 0xff;
30 int zpci_mod_fc(u64 req, struct zpci_fib *fib)
35 cc = __mpcifc(req, fib, &status);
37 msleep(ZPCI_INSN_BUSY_DELAY);
41 printk_once(KERN_ERR "%s: error cc: %d status: %d\n",
42 __func__, cc, status);
43 return (cc) ? -EIO : 0;
46 /* Refresh PCI Translations */
47 static inline u8 __rpcit(u64 fn, u64 addr, u64 range, u8 *status)
49 register u64 __addr asm("2") = addr;
50 register u64 __range asm("3") = range;
54 " .insn rre,0xb9d30000,%[fn],%[addr]\n"
57 : [cc] "=d" (cc), [fn] "+d" (fn)
58 : [addr] "d" (__addr), "d" (__range)
60 *status = fn >> 24 & 0xff;
64 int zpci_refresh_trans(u64 fn, u64 addr, u64 range)
69 cc = __rpcit(fn, addr, range, &status);
71 udelay(ZPCI_INSN_BUSY_DELAY);
75 printk_once(KERN_ERR "%s: error cc: %d status: %d dma_addr: %Lx size: %Lx\n",
76 __func__, cc, status, addr, range);
77 return (cc) ? -EIO : 0;
80 /* Set Interruption Controls */
81 void zpci_set_irq_ctrl(u16 ctl, char *unused, u8 isc)
84 " .insn rsy,0xeb00000000d1,%[ctl],%[isc],%[u]\n"
85 : : [ctl] "d" (ctl), [isc] "d" (isc << 27), [u] "Q" (*unused));
89 static inline int __pcilg(u64 *data, u64 req, u64 offset, u8 *status)
91 register u64 __req asm("2") = req;
92 register u64 __offset asm("3") = offset;
97 " .insn rre,0xb9d20000,%[data],%[req]\n"
102 : [cc] "+d" (cc), [data] "=d" (__data), [req] "+d" (__req)
105 *status = __req >> 24 & 0xff;
112 int zpci_load(u64 *data, u64 req, u64 offset)
118 cc = __pcilg(data, req, offset, &status);
120 udelay(ZPCI_INSN_BUSY_DELAY);
124 printk_once(KERN_ERR "%s: error cc: %d status: %d req: %Lx offset: %Lx\n",
125 __func__, cc, status, req, offset);
126 return (cc > 0) ? -EIO : cc;
128 EXPORT_SYMBOL_GPL(zpci_load);
131 static inline int __pcistg(u64 data, u64 req, u64 offset, u8 *status)
133 register u64 __req asm("2") = req;
134 register u64 __offset asm("3") = offset;
138 " .insn rre,0xb9d00000,%[data],%[req]\n"
143 : [cc] "+d" (cc), [req] "+d" (__req)
144 : "d" (__offset), [data] "d" (data)
146 *status = __req >> 24 & 0xff;
150 int zpci_store(u64 data, u64 req, u64 offset)
156 cc = __pcistg(data, req, offset, &status);
158 udelay(ZPCI_INSN_BUSY_DELAY);
162 printk_once(KERN_ERR "%s: error cc: %d status: %d req: %Lx offset: %Lx\n",
163 __func__, cc, status, req, offset);
164 return (cc > 0) ? -EIO : cc;
166 EXPORT_SYMBOL_GPL(zpci_store);
168 /* PCI Store Block */
169 static inline int __pcistb(const u64 *data, u64 req, u64 offset, u8 *status)
174 " .insn rsy,0xeb00000000d0,%[req],%[offset],%[data]\n"
179 : [cc] "+d" (cc), [req] "+d" (req)
180 : [offset] "d" (offset), [data] "Q" (*data)
182 *status = req >> 24 & 0xff;
186 int zpci_store_block(const u64 *data, u64 req, u64 offset)
192 cc = __pcistb(data, req, offset, &status);
194 udelay(ZPCI_INSN_BUSY_DELAY);
198 printk_once(KERN_ERR "%s: error cc: %d status: %d req: %Lx offset: %Lx\n",
199 __func__, cc, status, req, offset);
200 return (cc > 0) ? -EIO : cc;
202 EXPORT_SYMBOL_GPL(zpci_store_block);