290 lines
7.3 KiB
C
290 lines
7.3 KiB
C
/*
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* Copyright (C) 2012 CERN (www.cern.ch)
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* Author: Alessandro Rubini <rubini@gnudd.com>
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*
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* Released according to the GNU GPL, version 2 or any later version.
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*
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* This work is part of the White Rabbit project, a research effort led
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* by CERN, the European Institute for Nuclear Research.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/fmc.h>
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#include <linux/sdb.h>
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#include <linux/err.h>
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#include <linux/fmc-sdb.h>
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#include <asm/byteorder.h>
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static uint32_t __sdb_rd(struct fmc_device *fmc, unsigned long address,
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int convert)
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{
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uint32_t res = fmc_readl(fmc, address);
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if (convert)
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return __be32_to_cpu(res);
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return res;
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}
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static struct sdb_array *__fmc_scan_sdb_tree(struct fmc_device *fmc,
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unsigned long sdb_addr,
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unsigned long reg_base, int level)
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{
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uint32_t onew;
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int i, j, n, convert = 0;
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struct sdb_array *arr, *sub;
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onew = fmc_readl(fmc, sdb_addr);
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if (onew == SDB_MAGIC) {
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/* Uh! If we are little-endian, we must convert */
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if (SDB_MAGIC != __be32_to_cpu(SDB_MAGIC))
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convert = 1;
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} else if (onew == __be32_to_cpu(SDB_MAGIC)) {
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/* ok, don't convert */
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} else {
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return ERR_PTR(-ENOENT);
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}
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/* So, the magic was there: get the count from offset 4*/
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onew = __sdb_rd(fmc, sdb_addr + 4, convert);
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n = __be16_to_cpu(*(uint16_t *)&onew);
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arr = kzalloc(sizeof(*arr), GFP_KERNEL);
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if (!arr)
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return ERR_PTR(-ENOMEM);
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arr->record = kzalloc(sizeof(arr->record[0]) * n, GFP_KERNEL);
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arr->subtree = kzalloc(sizeof(arr->subtree[0]) * n, GFP_KERNEL);
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if (!arr->record || !arr->subtree) {
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kfree(arr->record);
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kfree(arr->subtree);
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kfree(arr);
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return ERR_PTR(-ENOMEM);
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}
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arr->len = n;
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arr->level = level;
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arr->fmc = fmc;
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for (i = 0; i < n; i++) {
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union sdb_record *r;
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for (j = 0; j < sizeof(arr->record[0]); j += 4) {
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*(uint32_t *)((void *)(arr->record + i) + j) =
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__sdb_rd(fmc, sdb_addr + (i * 64) + j, convert);
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}
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r = &arr->record[i];
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arr->subtree[i] = ERR_PTR(-ENODEV);
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if (r->empty.record_type == sdb_type_bridge) {
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struct sdb_component *c = &r->bridge.sdb_component;
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uint64_t subaddr = __be64_to_cpu(r->bridge.sdb_child);
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uint64_t newbase = __be64_to_cpu(c->addr_first);
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subaddr += reg_base;
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newbase += reg_base;
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sub = __fmc_scan_sdb_tree(fmc, subaddr, newbase,
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level + 1);
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arr->subtree[i] = sub; /* may be error */
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if (IS_ERR(sub))
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continue;
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sub->parent = arr;
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sub->baseaddr = newbase;
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}
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}
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return arr;
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}
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int fmc_scan_sdb_tree(struct fmc_device *fmc, unsigned long address)
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{
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struct sdb_array *ret;
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if (fmc->sdb)
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return -EBUSY;
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ret = __fmc_scan_sdb_tree(fmc, address, 0 /* regs */, 0);
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if (IS_ERR(ret))
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return PTR_ERR(ret);
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fmc->sdb = ret;
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return 0;
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}
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EXPORT_SYMBOL(fmc_scan_sdb_tree);
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static void __fmc_sdb_free(struct sdb_array *arr)
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{
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int i, n;
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if (!arr)
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return;
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n = arr->len;
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for (i = 0; i < n; i++) {
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if (IS_ERR(arr->subtree[i]))
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continue;
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__fmc_sdb_free(arr->subtree[i]);
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}
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kfree(arr->record);
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kfree(arr->subtree);
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kfree(arr);
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}
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int fmc_free_sdb_tree(struct fmc_device *fmc)
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{
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__fmc_sdb_free(fmc->sdb);
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fmc->sdb = NULL;
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return 0;
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}
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EXPORT_SYMBOL(fmc_free_sdb_tree);
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/* This helper calls reprogram and inizialized sdb as well */
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int fmc_reprogram(struct fmc_device *fmc, struct fmc_driver *d, char *gw,
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int sdb_entry)
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{
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int ret;
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ret = fmc->op->reprogram(fmc, d, gw);
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if (ret < 0)
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return ret;
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if (sdb_entry < 0)
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return ret;
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/* We are required to find SDB at a given offset */
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ret = fmc_scan_sdb_tree(fmc, sdb_entry);
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if (ret < 0) {
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dev_err(&fmc->dev, "Can't find SDB at address 0x%x\n",
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sdb_entry);
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return -ENODEV;
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}
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fmc_dump_sdb(fmc);
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return 0;
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}
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EXPORT_SYMBOL(fmc_reprogram);
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static char *__strip_trailing_space(char *buf, char *str, int len)
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{
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int i = len - 1;
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memcpy(buf, str, len);
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while(i >= 0 && buf[i] == ' ')
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buf[i--] = '\0';
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return buf;
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}
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#define __sdb_string(buf, field) ({ \
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BUILD_BUG_ON(sizeof(buf) < sizeof(field)); \
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__strip_trailing_space(buf, (void *)(field), sizeof(field)); \
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})
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static void __fmc_show_sdb_tree(const struct fmc_device *fmc,
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const struct sdb_array *arr)
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{
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unsigned long base = arr->baseaddr;
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int i, j, n = arr->len, level = arr->level;
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char buf[64];
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for (i = 0; i < n; i++) {
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union sdb_record *r;
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struct sdb_product *p;
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struct sdb_component *c;
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r = &arr->record[i];
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c = &r->dev.sdb_component;
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p = &c->product;
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dev_info(&fmc->dev, "SDB: ");
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for (j = 0; j < level; j++)
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printk(KERN_CONT " ");
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switch (r->empty.record_type) {
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case sdb_type_interconnect:
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printk(KERN_CONT "%08llx:%08x %.19s\n",
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__be64_to_cpu(p->vendor_id),
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__be32_to_cpu(p->device_id),
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p->name);
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break;
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case sdb_type_device:
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printk(KERN_CONT "%08llx:%08x %.19s (%08llx-%08llx)\n",
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__be64_to_cpu(p->vendor_id),
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__be32_to_cpu(p->device_id),
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p->name,
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__be64_to_cpu(c->addr_first) + base,
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__be64_to_cpu(c->addr_last) + base);
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break;
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case sdb_type_bridge:
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printk(KERN_CONT "%08llx:%08x %.19s (bridge: %08llx)\n",
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__be64_to_cpu(p->vendor_id),
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__be32_to_cpu(p->device_id),
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p->name,
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__be64_to_cpu(c->addr_first) + base);
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if (IS_ERR(arr->subtree[i])) {
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dev_info(&fmc->dev, "SDB: (bridge error %li)\n",
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PTR_ERR(arr->subtree[i]));
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break;
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}
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__fmc_show_sdb_tree(fmc, arr->subtree[i]);
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break;
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case sdb_type_integration:
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printk(KERN_CONT "integration\n");
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break;
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case sdb_type_repo_url:
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printk(KERN_CONT "Synthesis repository: %s\n",
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__sdb_string(buf, r->repo_url.repo_url));
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break;
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case sdb_type_synthesis:
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printk(KERN_CONT "Bitstream '%s' ",
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__sdb_string(buf, r->synthesis.syn_name));
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printk(KERN_CONT "synthesized %08x by %s ",
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__be32_to_cpu(r->synthesis.date),
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__sdb_string(buf, r->synthesis.user_name));
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printk(KERN_CONT "(%s version %x), ",
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__sdb_string(buf, r->synthesis.tool_name),
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__be32_to_cpu(r->synthesis.tool_version));
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printk(KERN_CONT "commit %pm\n",
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r->synthesis.commit_id);
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break;
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case sdb_type_empty:
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printk(KERN_CONT "empty\n");
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break;
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default:
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printk(KERN_CONT "UNKNOWN TYPE 0x%02x\n",
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r->empty.record_type);
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break;
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}
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}
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}
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void fmc_show_sdb_tree(const struct fmc_device *fmc)
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{
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if (!fmc->sdb)
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return;
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__fmc_show_sdb_tree(fmc, fmc->sdb);
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}
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EXPORT_SYMBOL(fmc_show_sdb_tree);
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signed long fmc_find_sdb_device(struct sdb_array *tree,
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uint64_t vid, uint32_t did, unsigned long *sz)
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{
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signed long res = -ENODEV;
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union sdb_record *r;
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struct sdb_product *p;
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struct sdb_component *c;
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int i, n = tree->len;
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uint64_t last, first;
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/* FIXME: what if the first interconnect is not at zero? */
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for (i = 0; i < n; i++) {
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r = &tree->record[i];
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c = &r->dev.sdb_component;
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p = &c->product;
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if (!IS_ERR(tree->subtree[i]))
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res = fmc_find_sdb_device(tree->subtree[i],
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vid, did, sz);
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if (res >= 0)
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return res + tree->baseaddr;
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if (r->empty.record_type != sdb_type_device)
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continue;
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if (__be64_to_cpu(p->vendor_id) != vid)
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continue;
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if (__be32_to_cpu(p->device_id) != did)
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continue;
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/* found */
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last = __be64_to_cpu(c->addr_last);
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first = __be64_to_cpu(c->addr_first);
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if (sz)
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*sz = (typeof(*sz))(last + 1 - first);
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return first + tree->baseaddr;
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}
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return res;
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}
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EXPORT_SYMBOL(fmc_find_sdb_device);
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