summaryrefslogtreecommitdiff
path: root/drivers/soc/fsl/qbman/bman_ccsr.c
blob: a8e8389a6894fbd5c277f9cc87f10de413d210df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
/* Copyright (c) 2009 - 2016 Freescale Semiconductor, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *	 notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *	 notice, this list of conditions and the following disclaimer in the
 *	 documentation and/or other materials provided with the distribution.
 *     * Neither the name of Freescale Semiconductor nor the
 *	 names of its contributors may be used to endorse or promote products
 *	 derived from this software without specific prior written permission.
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") as published by the Free Software
 * Foundation, either version 2 of that License or (at your option) any
 * later version.
 *
 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "bman_priv.h"

u16 bman_ip_rev;
EXPORT_SYMBOL(bman_ip_rev);

/* Register offsets */
#define REG_FBPR_FPC		0x0800
#define REG_ECSR		0x0a00
#define REG_ECIR		0x0a04
#define REG_EADR		0x0a08
#define REG_EDATA(n)		(0x0a10 + ((n) * 0x04))
#define REG_SBEC(n)		(0x0a80 + ((n) * 0x04))
#define REG_IP_REV_1		0x0bf8
#define REG_IP_REV_2		0x0bfc
#define REG_FBPR_BARE		0x0c00
#define REG_FBPR_BAR		0x0c04
#define REG_FBPR_AR		0x0c10
#define REG_SRCIDR		0x0d04
#define REG_LIODNR		0x0d08
#define REG_ERR_ISR		0x0e00
#define REG_ERR_IER		0x0e04
#define REG_ERR_ISDR		0x0e08

/* Used by all error interrupt registers except 'inhibit' */
#define BM_EIRQ_IVCI	0x00000010	/* Invalid Command Verb */
#define BM_EIRQ_FLWI	0x00000008	/* FBPR Low Watermark */
#define BM_EIRQ_MBEI	0x00000004	/* Multi-bit ECC Error */
#define BM_EIRQ_SBEI	0x00000002	/* Single-bit ECC Error */
#define BM_EIRQ_BSCN	0x00000001	/* pool State Change Notification */

struct bman_hwerr_txt {
	u32 mask;
	const char *txt;
};

static const struct bman_hwerr_txt bman_hwerr_txts[] = {
	{ BM_EIRQ_IVCI, "Invalid Command Verb" },
	{ BM_EIRQ_FLWI, "FBPR Low Watermark" },
	{ BM_EIRQ_MBEI, "Multi-bit ECC Error" },
	{ BM_EIRQ_SBEI, "Single-bit ECC Error" },
	{ BM_EIRQ_BSCN, "Pool State Change Notification" },
};

/* Only trigger low water mark interrupt once only */
#define BMAN_ERRS_TO_DISABLE BM_EIRQ_FLWI

/* Pointer to the start of the BMan's CCSR space */
static u32 __iomem *bm_ccsr_start;

static inline u32 bm_ccsr_in(u32 offset)
{
	return ioread32be(bm_ccsr_start + offset/4);
}
static inline void bm_ccsr_out(u32 offset, u32 val)
{
	iowrite32be(val, bm_ccsr_start + offset/4);
}

static void bm_get_version(u16 *id, u8 *major, u8 *minor)
{
	u32 v = bm_ccsr_in(REG_IP_REV_1);
	*id = (v >> 16);
	*major = (v >> 8) & 0xff;
	*minor = v & 0xff;
}

/* signal transactions for FBPRs with higher priority */
#define FBPR_AR_RPRIO_HI BIT(30)

static void bm_set_memory(u64 ba, u32 size)
{
	u32 exp = ilog2(size);
	/* choke if size isn't within range */
	DPAA_ASSERT(size >= 4096 && size <= 1024*1024*1024 &&
		   is_power_of_2(size));
	/* choke if '[e]ba' has lower-alignment than 'size' */
	DPAA_ASSERT(!(ba & (size - 1)));
	bm_ccsr_out(REG_FBPR_BARE, upper_32_bits(ba));
	bm_ccsr_out(REG_FBPR_BAR, lower_32_bits(ba));
	bm_ccsr_out(REG_FBPR_AR, exp - 1);
}

/*
 * Location and size of BMan private memory
 *
 * Ideally we would use the DMA API to turn rmem->base into a DMA address
 * (especially if iommu translations ever get involved).  Unfortunately, the
 * DMA API currently does not allow mapping anything that is not backed with
 * a struct page.
 */
static dma_addr_t fbpr_a;
static size_t fbpr_sz;

static int bman_fbpr(struct reserved_mem *rmem)
{
	fbpr_a = rmem->base;
	fbpr_sz = rmem->size;

	WARN_ON(!(fbpr_a && fbpr_sz));

	return 0;
}
RESERVEDMEM_OF_DECLARE(bman_fbpr, "fsl,bman-fbpr", bman_fbpr);

static irqreturn_t bman_isr(int irq, void *ptr)
{
	u32 isr_val, ier_val, ecsr_val, isr_mask, i;
	struct device *dev = ptr;

	ier_val = bm_ccsr_in(REG_ERR_IER);
	isr_val = bm_ccsr_in(REG_ERR_ISR);
	ecsr_val = bm_ccsr_in(REG_ECSR);
	isr_mask = isr_val & ier_val;

	if (!isr_mask)
		return IRQ_NONE;

	for (i = 0; i < ARRAY_SIZE(bman_hwerr_txts); i++) {
		if (bman_hwerr_txts[i].mask & isr_mask) {
			dev_err_ratelimited(dev, "ErrInt: %s\n",
					    bman_hwerr_txts[i].txt);
			if (bman_hwerr_txts[i].mask & ecsr_val) {
				/* Re-arm error capture registers */
				bm_ccsr_out(REG_ECSR, ecsr_val);
			}
			if (bman_hwerr_txts[i].mask & BMAN_ERRS_TO_DISABLE) {
				dev_dbg(dev, "Disabling error 0x%x\n",
					bman_hwerr_txts[i].mask);
				ier_val &= ~bman_hwerr_txts[i].mask;
				bm_ccsr_out(REG_ERR_IER, ier_val);
			}
		}
	}
	bm_ccsr_out(REG_ERR_ISR, isr_val);

	return IRQ_HANDLED;
}

static int fsl_bman_probe(struct platform_device *pdev)
{
	int ret, err_irq;
	struct device *dev = &pdev->dev;
	struct device_node *node = dev->of_node;
	struct resource *res;
	u16 id, bm_pool_cnt;
	u8 major, minor;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(dev, "Can't get %s property 'IORESOURCE_MEM'\n",
			node->full_name);
		return -ENXIO;
	}
	bm_ccsr_start = devm_ioremap(dev, res->start, resource_size(res));
	if (!bm_ccsr_start)
		return -ENXIO;

	bm_get_version(&id, &major, &minor);
	if (major == 1 && minor == 0) {
		bman_ip_rev = BMAN_REV10;
		bm_pool_cnt = BM_POOL_MAX;
	} else if (major == 2 && minor == 0) {
		bman_ip_rev = BMAN_REV20;
		bm_pool_cnt = 8;
	} else if (major == 2 && minor == 1) {
		bman_ip_rev = BMAN_REV21;
		bm_pool_cnt = BM_POOL_MAX;
	} else {
		dev_err(dev, "Unknown Bman version:%04x,%02x,%02x\n",
			id, major, minor);
		return -ENODEV;
	}

	bm_set_memory(fbpr_a, fbpr_sz);

	err_irq = platform_get_irq(pdev, 0);
	if (err_irq <= 0) {
		dev_info(dev, "Can't get %s IRQ\n", node->full_name);
		return -ENODEV;
	}
	ret = devm_request_irq(dev, err_irq, bman_isr, IRQF_SHARED, "bman-err",
			       dev);
	if (ret)  {
		dev_err(dev, "devm_request_irq() failed %d for '%s'\n",
			ret, node->full_name);
		return ret;
	}
	/* Disable Buffer Pool State Change */
	bm_ccsr_out(REG_ERR_ISDR, BM_EIRQ_BSCN);
	/*
	 * Write-to-clear any stale bits, (eg. starvation being asserted prior
	 * to resource allocation during driver init).
	 */
	bm_ccsr_out(REG_ERR_ISR, 0xffffffff);
	/* Enable Error Interrupts */
	bm_ccsr_out(REG_ERR_IER, 0xffffffff);

	bm_bpalloc = devm_gen_pool_create(dev, 0, -1, "bman-bpalloc");
	if (IS_ERR(bm_bpalloc)) {
		ret = PTR_ERR(bm_bpalloc);
		dev_err(dev, "bman-bpalloc pool init failed (%d)\n", ret);
		return ret;
	}

	/* seed BMan resource pool */
	ret = gen_pool_add(bm_bpalloc, DPAA_GENALLOC_OFF, bm_pool_cnt, -1);
	if (ret) {
		dev_err(dev, "Failed to seed BPID range [%d..%d] (%d)\n",
			0, bm_pool_cnt - 1, ret);
		return ret;
	}

	return 0;
};

static const struct of_device_id fsl_bman_ids[] = {
	{
		.compatible = "fsl,bman",
	},
	{}
};

static struct platform_driver fsl_bman_driver = {
	.driver = {
		.name = KBUILD_MODNAME,
		.of_match_table = fsl_bman_ids,
		.suppress_bind_attrs = true,
	},
	.probe = fsl_bman_probe,
};

builtin_platform_driver(fsl_bman_driver);