[linux-2.6-block.git] / drivers / fmc / fmc-sdb.c

/*
 * Copyright (C) 2012 CERN (www.cern.ch)
 * Author: Alessandro Rubini <rubini@gnudd.com>
 *
 * Released according to the GNU GPL, version 2 or any later version.
 *
 * This work is part of the White Rabbit project, a research effort led
 * by CERN, the European Institute for Nuclear Research.
 */
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/fmc.h>
#include <linux/sdb.h>
#include <linux/err.h>
#include <linux/fmc-sdb.h>
#include <asm/byteorder.h>

static uint32_t __sdb_rd(struct fmc_device *fmc, unsigned long address,
			int convert)
{
	uint32_t res = fmc_readl(fmc, address);
	if (convert)
		return __be32_to_cpu(res);
	return res;
}

static struct sdb_array *__fmc_scan_sdb_tree(struct fmc_device *fmc,
					     unsigned long sdb_addr,
					     unsigned long reg_base, int level)
{
	uint32_t onew;
	int i, j, n, convert = 0;
	struct sdb_array *arr, *sub;

	onew = fmc_readl(fmc, sdb_addr);
	if (onew == SDB_MAGIC) {
		/* Uh! If we are little-endian, we must convert */
		if (SDB_MAGIC != __be32_to_cpu(SDB_MAGIC))
			convert = 1;
	} else if (onew == __be32_to_cpu(SDB_MAGIC)) {
		/* ok, don't convert */
	} else {
		return ERR_PTR(-ENOENT);
	}
	/* So, the magic was there: get the count from offset 4*/
	onew = __sdb_rd(fmc, sdb_addr + 4, convert);
	n = __be16_to_cpu(*(uint16_t *)&onew);
	arr = kzalloc(sizeof(*arr), GFP_KERNEL);
	if (arr) {
		arr->record = kzalloc(sizeof(arr->record[0]) * n, GFP_KERNEL);
		arr->subtree = kzalloc(sizeof(arr->subtree[0]) * n, GFP_KERNEL);
	}
	if (!arr || !arr->record || !arr->subtree) {
		kfree(arr->record);
		kfree(arr->subtree);
		kfree(arr);
		return ERR_PTR(-ENOMEM);
	}
	arr->len = n;
	arr->level = level;
	arr->fmc = fmc;
	for (i = 0; i < n; i++) {
		union  sdb_record *r;

		for (j = 0; j < sizeof(arr->record[0]); j += 4) {
			*(uint32_t *)((void *)(arr->record + i) + j) =
				__sdb_rd(fmc, sdb_addr + (i * 64) + j, convert);
		}
		r = &arr->record[i];
		arr->subtree[i] = ERR_PTR(-ENODEV);
		if (r->empty.record_type == sdb_type_bridge) {
			struct sdb_component *c = &r->bridge.sdb_component;
			uint64_t subaddr = __be64_to_cpu(r->bridge.sdb_child);
			uint64_t newbase = __be64_to_cpu(c->addr_first);

			subaddr += reg_base;
			newbase += reg_base;
			sub = __fmc_scan_sdb_tree(fmc, subaddr, newbase,
						  level + 1);
			arr->subtree[i] = sub; /* may be error */
			if (IS_ERR(sub))
				continue;
			sub->parent = arr;
			sub->baseaddr = newbase;
		}
	}
	return arr;
}

int fmc_scan_sdb_tree(struct fmc_device *fmc, unsigned long address)
{
	struct sdb_array *ret;
	if (fmc->sdb)
		return -EBUSY;
	ret = __fmc_scan_sdb_tree(fmc, address, 0 /* regs */, 0);
	if (IS_ERR(ret))
		return PTR_ERR(ret);
	fmc->sdb = ret;
	return 0;
}
EXPORT_SYMBOL(fmc_scan_sdb_tree);

static void __fmc_sdb_free(struct sdb_array *arr)
{
	int i, n;

	if (!arr)
		return;
	n = arr->len;
	for (i = 0; i < n; i++) {
		if (IS_ERR(arr->subtree[i]))
			continue;
		__fmc_sdb_free(arr->subtree[i]);
	}
	kfree(arr->record);
	kfree(arr->subtree);
	kfree(arr);
}

int fmc_free_sdb_tree(struct fmc_device *fmc)
{
	__fmc_sdb_free(fmc->sdb);
	fmc->sdb = NULL;
	return 0;
}
EXPORT_SYMBOL(fmc_free_sdb_tree);

/* This helper calls reprogram and inizialized sdb as well */
int fmc_reprogram(struct fmc_device *fmc, struct fmc_driver *d, char *gw,
			 int sdb_entry)
{
	int ret;

	ret = fmc->op->reprogram(fmc, d, gw);
	if (ret < 0)
		return ret;
	if (sdb_entry < 0)
		return ret;

	/* We are required to find SDB at a given offset */
	ret = fmc_scan_sdb_tree(fmc, sdb_entry);
	if (ret < 0) {
		dev_err(&fmc->dev, "Can't find SDB at address 0x%x\n",
			sdb_entry);
		return -ENODEV;
	}
	fmc_dump_sdb(fmc);
	return 0;
}
EXPORT_SYMBOL(fmc_reprogram);

static void __fmc_show_sdb_tree(const struct fmc_device *fmc,
				const struct sdb_array *arr)
{
	int i, j, n = arr->len, level = arr->level;
	const struct sdb_array *ap;

	for (i = 0; i < n; i++) {
		unsigned long base;
		union  sdb_record *r;
		struct sdb_product *p;
		struct sdb_component *c;
		r = &arr->record[i];
		c = &r->dev.sdb_component;
		p = &c->product;
		base = 0;
		for (ap = arr; ap; ap = ap->parent)
			base += ap->baseaddr;
		dev_info(&fmc->dev, "SDB: ");

		for (j = 0; j < level; j++)
			printk(KERN_CONT "   ");
		switch (r->empty.record_type) {
		case sdb_type_interconnect:
			printk(KERN_CONT "%08llx:%08x %.19s\n",
			       __be64_to_cpu(p->vendor_id),
			       __be32_to_cpu(p->device_id),
			       p->name);
			break;
		case sdb_type_device:
			printk(KERN_CONT "%08llx:%08x %.19s (%08llx-%08llx)\n",
			       __be64_to_cpu(p->vendor_id),
			       __be32_to_cpu(p->device_id),
			       p->name,
			       __be64_to_cpu(c->addr_first) + base,
			       __be64_to_cpu(c->addr_last) + base);
			break;
		case sdb_type_bridge:
			printk(KERN_CONT "%08llx:%08x %.19s (bridge: %08llx)\n",
			       __be64_to_cpu(p->vendor_id),
			       __be32_to_cpu(p->device_id),
			       p->name,
			       __be64_to_cpu(c->addr_first) + base);
			if (IS_ERR(arr->subtree[i])) {
				printk(KERN_CONT "(bridge error %li)\n",
				       PTR_ERR(arr->subtree[i]));
				break;
			}
			__fmc_show_sdb_tree(fmc, arr->subtree[i]);
			break;
		case sdb_type_integration:
			printk(KERN_CONT "integration\n");
			break;
		case sdb_type_repo_url:
			printk(KERN_CONT "repo-url\n");
			break;
		case sdb_type_synthesis:
			printk(KERN_CONT "synthesis-info\n");
			break;
		case sdb_type_empty:
			printk(KERN_CONT "empty\n");
			break;
		default:
			printk(KERN_CONT "UNKNOWN TYPE 0x%02x\n",
			       r->empty.record_type);
			break;
		}
	}
}

void fmc_show_sdb_tree(const struct fmc_device *fmc)
{
	if (!fmc->sdb)
		return;
	__fmc_show_sdb_tree(fmc, fmc->sdb);
}
EXPORT_SYMBOL(fmc_show_sdb_tree);

signed long fmc_find_sdb_device(struct sdb_array *tree,
				uint64_t vid, uint32_t did, unsigned long *sz)
{
	signed long res = -ENODEV;
	union  sdb_record *r;
	struct sdb_product *p;
	struct sdb_component *c;
	int i, n = tree->len;
	uint64_t last, first;

	/* FIXME: what if the first interconnect is not at zero? */
	for (i = 0; i < n; i++) {
		r = &tree->record[i];
		c = &r->dev.sdb_component;
		p = &c->product;

		if (!IS_ERR(tree->subtree[i]))
			res = fmc_find_sdb_device(tree->subtree[i],
						  vid, did, sz);
		if (res >= 0)
			return res + tree->baseaddr;
		if (r->empty.record_type != sdb_type_device)
			continue;
		if (__be64_to_cpu(p->vendor_id) != vid)
			continue;
		if (__be32_to_cpu(p->device_id) != did)
			continue;
		/* found */
		last = __be64_to_cpu(c->addr_last);
		first = __be64_to_cpu(c->addr_first);
		if (sz)
			*sz = (typeof(*sz))(last + 1 - first);
		return first + tree->baseaddr;
	}
	return res;
}
EXPORT_SYMBOL(fmc_find_sdb_device);
Commit	Line	Data
77864f2e AR	1	/*
	2	* Copyright (C) 2012 CERN (www.cern.ch)
	3	* Author: Alessandro Rubini <rubini@gnudd.com>
	4	*
	5	* Released according to the GNU GPL, version 2 or any later version.
	6	*
	7	* This work is part of the White Rabbit project, a research effort led
	8	* by CERN, the European Institute for Nuclear Research.
	9	*/
	10	#include <linux/module.h>
	11	#include <linux/slab.h>
	12	#include <linux/fmc.h>
	13	#include <linux/sdb.h>
	14	#include <linux/err.h>
	15	#include <linux/fmc-sdb.h>
	16	#include <asm/byteorder.h>
	17
	18	static uint32_t __sdb_rd(struct fmc_device *fmc, unsigned long address,
	19	int convert)
	20	{
	21	uint32_t res = fmc_readl(fmc, address);
	22	if (convert)
	23	return __be32_to_cpu(res);
	24	return res;
	25	}
	26
	27	static struct sdb_array __fmc_scan_sdb_tree(struct fmc_device fmc,
	28	unsigned long sdb_addr,
	29	unsigned long reg_base, int level)
	30	{
	31	uint32_t onew;
	32	int i, j, n, convert = 0;
	33	struct sdb_array arr, sub;
	34
	35	onew = fmc_readl(fmc, sdb_addr);
	36	if (onew == SDB_MAGIC) {
	37	/* Uh! If we are little-endian, we must convert */
	38	if (SDB_MAGIC != __be32_to_cpu(SDB_MAGIC))
	39	convert = 1;
	40	} else if (onew == __be32_to_cpu(SDB_MAGIC)) {
	41	/* ok, don't convert */
	42	} else {
	43	return ERR_PTR(-ENOENT);
	44	}
	45	/* So, the magic was there: get the count from offset 4*/
	46	onew = __sdb_rd(fmc, sdb_addr + 4, convert);
	47	n = __be16_to_cpu((uint16_t )&onew);
	48	arr = kzalloc(sizeof(*arr), GFP_KERNEL);
	49	if (arr) {
	50	arr->record = kzalloc(sizeof(arr->record[0]) * n, GFP_KERNEL);
	51	arr->subtree = kzalloc(sizeof(arr->subtree[0]) * n, GFP_KERNEL);
	52	}
	53	if (!arr \|\| !arr->record \|\| !arr->subtree) {
	54	kfree(arr->record);
	55	kfree(arr->subtree);
	56	kfree(arr);
	57	return ERR_PTR(-ENOMEM);
	58	}
	59	arr->len = n;
	60	arr->level = level;
	61	arr->fmc = fmc;
	62	for (i = 0; i < n; i++) {
	63	union sdb_record *r;
	64
65	for (j = 0; j < sizeof(arr->record[0]); j += 4) {
66	(uint32_t )((void *)(arr->record + i) + j) =
67	__sdb_rd(fmc, sdb_addr + (i * 64) + j, convert);
68	}
69	r = &arr->record[i];
70	arr->subtree[i] = ERR_PTR(-ENODEV);
71	if (r->empty.record_type == sdb_type_bridge) {
72	struct sdb_component *c = &r->bridge.sdb_component;
73	uint64_t subaddr = __be64_to_cpu(r->bridge.sdb_child);
74	uint64_t newbase = __be64_to_cpu(c->addr_first);
75
76	subaddr += reg_base;
77	newbase += reg_base;
78	sub = __fmc_scan_sdb_tree(fmc, subaddr, newbase,
79	level + 1);
80	arr->subtree[i] = sub; /* may be error */
81	if (IS_ERR(sub))
82	continue;
83	sub->parent = arr;
84	sub->baseaddr = newbase;
85	}
86	}
87	return arr;
88	}
89
90	int fmc_scan_sdb_tree(struct fmc_device *fmc, unsigned long address)
91	{
92	struct sdb_array *ret;
93	if (fmc->sdb)
94	return -EBUSY;
95	ret = __fmc_scan_sdb_tree(fmc, address, 0 /* regs */, 0);
96	if (IS_ERR(ret))
97	return PTR_ERR(ret);
98	fmc->sdb = ret;
99	return 0;
100	}
101	EXPORT_SYMBOL(fmc_scan_sdb_tree);
102
103	static void __fmc_sdb_free(struct sdb_array *arr)
104	{
105	int i, n;
106
107	if (!arr)
108	return;
109	n = arr->len;
110	for (i = 0; i < n; i++) {
111	if (IS_ERR(arr->subtree[i]))
112	continue;
113	__fmc_sdb_free(arr->subtree[i]);
114	}
115	kfree(arr->record);
116	kfree(arr->subtree);
117	kfree(arr);
118	}
119
120	int fmc_free_sdb_tree(struct fmc_device *fmc)
121	{
122	__fmc_sdb_free(fmc->sdb);
123	fmc->sdb = NULL;
124	return 0;
125	}
126	EXPORT_SYMBOL(fmc_free_sdb_tree);
127
128	/* This helper calls reprogram and inizialized sdb as well */
129	int fmc_reprogram(struct fmc_device fmc, struct fmc_driver d, char *gw,
130	int sdb_entry)
131	{
132	int ret;
133
134	ret = fmc->op->reprogram(fmc, d, gw);
135	if (ret < 0)
136	return ret;
137	if (sdb_entry < 0)
138	return ret;
139
140	/* We are required to find SDB at a given offset */
141	ret = fmc_scan_sdb_tree(fmc, sdb_entry);
142	if (ret < 0) {
143	dev_err(&fmc->dev, "Can't find SDB at address 0x%x\n",
144	sdb_entry);
145	return -ENODEV;
146	}
147	fmc_dump_sdb(fmc);
148	return 0;
149	}
150	EXPORT_SYMBOL(fmc_reprogram);
151
152	static void __fmc_show_sdb_tree(const struct fmc_device *fmc,
153	const struct sdb_array *arr)
154	{
155	int i, j, n = arr->len, level = arr->level;
156	const struct sdb_array *ap;
157
158	for (i = 0; i < n; i++) {
159	unsigned long base;
160	union sdb_record *r;
161	struct sdb_product *p;
162	struct sdb_component *c;
163	r = &arr->record[i];
164	c = &r->dev.sdb_component;
165	p = &c->product;
166	base = 0;
167	for (ap = arr; ap; ap = ap->parent)
168	base += ap->baseaddr;
169	dev_info(&fmc->dev, "SDB: ");
170
171	for (j = 0; j < level; j++)
172	printk(KERN_CONT " ");
173	switch (r->empty.record_type) {
174	case sdb_type_interconnect:
175	printk(KERN_CONT "%08llx:%08x %.19s\n",
176	__be64_to_cpu(p->vendor_id),
177	__be32_to_cpu(p->device_id),
178	p->name);
179	break;
180	case sdb_type_device:
181	printk(KERN_CONT "%08llx:%08x %.19s (%08llx-%08llx)\n",
182	__be64_to_cpu(p->vendor_id),
183	__be32_to_cpu(p->device_id),
184	p->name,
185	__be64_to_cpu(c->addr_first) + base,
186	__be64_to_cpu(c->addr_last) + base);
187	break;
188	case sdb_type_bridge:
189	printk(KERN_CONT "%08llx:%08x %.19s (bridge: %08llx)\n",
190	__be64_to_cpu(p->vendor_id),
191	__be32_to_cpu(p->device_id),
192	p->name,
193	__be64_to_cpu(c->addr_first) + base);
194	if (IS_ERR(arr->subtree[i])) {
195	printk(KERN_CONT "(bridge error %li)\n",
196	PTR_ERR(arr->subtree[i]));
197	break;
198	}
199	__fmc_show_sdb_tree(fmc, arr->subtree[i]);
200	break;
201	case sdb_type_integration:
202	printk(KERN_CONT "integration\n");
203	break;
204	case sdb_type_repo_url:
205	printk(KERN_CONT "repo-url\n");
206	break;
207	case sdb_type_synthesis:
208	printk(KERN_CONT "synthesis-info\n");
209	break;
210	case sdb_type_empty:
211	printk(KERN_CONT "empty\n");
212	break;
213	default:
214	printk(KERN_CONT "UNKNOWN TYPE 0x%02x\n",
215	r->empty.record_type);
216	break;
217	}
218	}
219	}
220
221	void fmc_show_sdb_tree(const struct fmc_device *fmc)
222	{
223	if (!fmc->sdb)
224	return;
225	__fmc_show_sdb_tree(fmc, fmc->sdb);
226	}
227	EXPORT_SYMBOL(fmc_show_sdb_tree);
228
229	signed long fmc_find_sdb_device(struct sdb_array *tree,
230	uint64_t vid, uint32_t did, unsigned long *sz)
231	{
232	signed long res = -ENODEV;
233	union sdb_record *r;
234	struct sdb_product *p;
235	struct sdb_component *c;
236	int i, n = tree->len;
237	uint64_t last, first;
238
239	/* FIXME: what if the first interconnect is not at zero? */
240	for (i = 0; i < n; i++) {
241	r = &tree->record[i];
242	c = &r->dev.sdb_component;
243	p = &c->product;
244
245	if (!IS_ERR(tree->subtree[i]))
246	res = fmc_find_sdb_device(tree->subtree[i],
247	vid, did, sz);
248	if (res >= 0)
249	return res + tree->baseaddr;
250	if (r->empty.record_type != sdb_type_device)
251	continue;
252	if (__be64_to_cpu(p->vendor_id) != vid)
253	continue;
254	if (__be32_to_cpu(p->device_id) != did)
255	continue;
256	/* found */
257	last = __be64_to_cpu(c->addr_last);
258	first = __be64_to_cpu(c->addr_first);
259	if (sz)
260	sz = (typeof(sz))(last + 1 - first);
261	return first + tree->baseaddr;
262	}
263	return res;
264	}
265	EXPORT_SYMBOL(fmc_find_sdb_device);