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[linux/fpc-iii.git] / drivers / soc / fsl / qbman / bman_ccsr.c
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1 /* Copyright (c) 2009 - 2016 Freescale Semiconductor, Inc.
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are met:
5 * * Redistributions of source code must retain the above copyright
6 * notice, this list of conditions and the following disclaimer.
7 * * Redistributions in binary form must reproduce the above copyright
8 * notice, this list of conditions and the following disclaimer in the
9 * documentation and/or other materials provided with the distribution.
10 * * Neither the name of Freescale Semiconductor nor the
11 * names of its contributors may be used to endorse or promote products
12 * derived from this software without specific prior written permission.
14 * ALTERNATIVELY, this software may be distributed under the terms of the
15 * GNU General Public License ("GPL") as published by the Free Software
16 * Foundation, either version 2 of that License or (at your option) any
17 * later version.
19 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include "bman_priv.h"
33 u16 bman_ip_rev;
34 EXPORT_SYMBOL(bman_ip_rev);
36 /* Register offsets */
37 #define REG_FBPR_FPC 0x0800
38 #define REG_ECSR 0x0a00
39 #define REG_ECIR 0x0a04
40 #define REG_EADR 0x0a08
41 #define REG_EDATA(n) (0x0a10 + ((n) * 0x04))
42 #define REG_SBEC(n) (0x0a80 + ((n) * 0x04))
43 #define REG_IP_REV_1 0x0bf8
44 #define REG_IP_REV_2 0x0bfc
45 #define REG_FBPR_BARE 0x0c00
46 #define REG_FBPR_BAR 0x0c04
47 #define REG_FBPR_AR 0x0c10
48 #define REG_SRCIDR 0x0d04
49 #define REG_LIODNR 0x0d08
50 #define REG_ERR_ISR 0x0e00
51 #define REG_ERR_IER 0x0e04
52 #define REG_ERR_ISDR 0x0e08
54 /* Used by all error interrupt registers except 'inhibit' */
55 #define BM_EIRQ_IVCI 0x00000010 /* Invalid Command Verb */
56 #define BM_EIRQ_FLWI 0x00000008 /* FBPR Low Watermark */
57 #define BM_EIRQ_MBEI 0x00000004 /* Multi-bit ECC Error */
58 #define BM_EIRQ_SBEI 0x00000002 /* Single-bit ECC Error */
59 #define BM_EIRQ_BSCN 0x00000001 /* pool State Change Notification */
61 struct bman_hwerr_txt {
62 u32 mask;
63 const char *txt;
66 static const struct bman_hwerr_txt bman_hwerr_txts[] = {
67 { BM_EIRQ_IVCI, "Invalid Command Verb" },
68 { BM_EIRQ_FLWI, "FBPR Low Watermark" },
69 { BM_EIRQ_MBEI, "Multi-bit ECC Error" },
70 { BM_EIRQ_SBEI, "Single-bit ECC Error" },
71 { BM_EIRQ_BSCN, "Pool State Change Notification" },
74 /* Only trigger low water mark interrupt once only */
75 #define BMAN_ERRS_TO_DISABLE BM_EIRQ_FLWI
77 /* Pointer to the start of the BMan's CCSR space */
78 static u32 __iomem *bm_ccsr_start;
80 static inline u32 bm_ccsr_in(u32 offset)
82 return ioread32be(bm_ccsr_start + offset/4);
84 static inline void bm_ccsr_out(u32 offset, u32 val)
86 iowrite32be(val, bm_ccsr_start + offset/4);
89 static void bm_get_version(u16 *id, u8 *major, u8 *minor)
91 u32 v = bm_ccsr_in(REG_IP_REV_1);
92 *id = (v >> 16);
93 *major = (v >> 8) & 0xff;
94 *minor = v & 0xff;
97 /* signal transactions for FBPRs with higher priority */
98 #define FBPR_AR_RPRIO_HI BIT(30)
100 static void bm_set_memory(u64 ba, u32 size)
102 u32 exp = ilog2(size);
103 /* choke if size isn't within range */
104 DPAA_ASSERT(size >= 4096 && size <= 1024*1024*1024 &&
105 is_power_of_2(size));
106 /* choke if '[e]ba' has lower-alignment than 'size' */
107 DPAA_ASSERT(!(ba & (size - 1)));
108 bm_ccsr_out(REG_FBPR_BARE, upper_32_bits(ba));
109 bm_ccsr_out(REG_FBPR_BAR, lower_32_bits(ba));
110 bm_ccsr_out(REG_FBPR_AR, exp - 1);
114 * Location and size of BMan private memory
116 * Ideally we would use the DMA API to turn rmem->base into a DMA address
117 * (especially if iommu translations ever get involved). Unfortunately, the
118 * DMA API currently does not allow mapping anything that is not backed with
119 * a struct page.
121 static dma_addr_t fbpr_a;
122 static size_t fbpr_sz;
124 static int bman_fbpr(struct reserved_mem *rmem)
126 fbpr_a = rmem->base;
127 fbpr_sz = rmem->size;
129 WARN_ON(!(fbpr_a && fbpr_sz));
131 return 0;
133 RESERVEDMEM_OF_DECLARE(bman_fbpr, "fsl,bman-fbpr", bman_fbpr);
135 static irqreturn_t bman_isr(int irq, void *ptr)
137 u32 isr_val, ier_val, ecsr_val, isr_mask, i;
138 struct device *dev = ptr;
140 ier_val = bm_ccsr_in(REG_ERR_IER);
141 isr_val = bm_ccsr_in(REG_ERR_ISR);
142 ecsr_val = bm_ccsr_in(REG_ECSR);
143 isr_mask = isr_val & ier_val;
145 if (!isr_mask)
146 return IRQ_NONE;
148 for (i = 0; i < ARRAY_SIZE(bman_hwerr_txts); i++) {
149 if (bman_hwerr_txts[i].mask & isr_mask) {
150 dev_err_ratelimited(dev, "ErrInt: %s\n",
151 bman_hwerr_txts[i].txt);
152 if (bman_hwerr_txts[i].mask & ecsr_val) {
153 /* Re-arm error capture registers */
154 bm_ccsr_out(REG_ECSR, ecsr_val);
156 if (bman_hwerr_txts[i].mask & BMAN_ERRS_TO_DISABLE) {
157 dev_dbg(dev, "Disabling error 0x%x\n",
158 bman_hwerr_txts[i].mask);
159 ier_val &= ~bman_hwerr_txts[i].mask;
160 bm_ccsr_out(REG_ERR_IER, ier_val);
164 bm_ccsr_out(REG_ERR_ISR, isr_val);
166 return IRQ_HANDLED;
169 static int fsl_bman_probe(struct platform_device *pdev)
171 int ret, err_irq;
172 struct device *dev = &pdev->dev;
173 struct device_node *node = dev->of_node;
174 struct resource *res;
175 u16 id, bm_pool_cnt;
176 u8 major, minor;
178 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
179 if (!res) {
180 dev_err(dev, "Can't get %pOF property 'IORESOURCE_MEM'\n",
181 node);
182 return -ENXIO;
184 bm_ccsr_start = devm_ioremap(dev, res->start, resource_size(res));
185 if (!bm_ccsr_start)
186 return -ENXIO;
188 bm_get_version(&id, &major, &minor);
189 if (major == 1 && minor == 0) {
190 bman_ip_rev = BMAN_REV10;
191 bm_pool_cnt = BM_POOL_MAX;
192 } else if (major == 2 && minor == 0) {
193 bman_ip_rev = BMAN_REV20;
194 bm_pool_cnt = 8;
195 } else if (major == 2 && minor == 1) {
196 bman_ip_rev = BMAN_REV21;
197 bm_pool_cnt = BM_POOL_MAX;
198 } else {
199 dev_err(dev, "Unknown Bman version:%04x,%02x,%02x\n",
200 id, major, minor);
201 return -ENODEV;
205 * If FBPR memory wasn't defined using the qbman compatible string
206 * try using the of_reserved_mem_device method
208 if (!fbpr_a) {
209 ret = qbman_init_private_mem(dev, 0, &fbpr_a, &fbpr_sz);
210 if (ret) {
211 dev_err(dev, "qbman_init_private_mem() failed 0x%x\n",
212 ret);
213 return -ENODEV;
217 dev_dbg(dev, "Allocated FBPR 0x%llx 0x%zx\n", fbpr_a, fbpr_sz);
219 bm_set_memory(fbpr_a, fbpr_sz);
221 err_irq = platform_get_irq(pdev, 0);
222 if (err_irq <= 0) {
223 dev_info(dev, "Can't get %pOF IRQ\n", node);
224 return -ENODEV;
226 ret = devm_request_irq(dev, err_irq, bman_isr, IRQF_SHARED, "bman-err",
227 dev);
228 if (ret) {
229 dev_err(dev, "devm_request_irq() failed %d for '%pOF'\n",
230 ret, node);
231 return ret;
233 /* Disable Buffer Pool State Change */
234 bm_ccsr_out(REG_ERR_ISDR, BM_EIRQ_BSCN);
236 * Write-to-clear any stale bits, (eg. starvation being asserted prior
237 * to resource allocation during driver init).
239 bm_ccsr_out(REG_ERR_ISR, 0xffffffff);
240 /* Enable Error Interrupts */
241 bm_ccsr_out(REG_ERR_IER, 0xffffffff);
243 bm_bpalloc = devm_gen_pool_create(dev, 0, -1, "bman-bpalloc");
244 if (IS_ERR(bm_bpalloc)) {
245 ret = PTR_ERR(bm_bpalloc);
246 dev_err(dev, "bman-bpalloc pool init failed (%d)\n", ret);
247 return ret;
250 /* seed BMan resource pool */
251 ret = gen_pool_add(bm_bpalloc, DPAA_GENALLOC_OFF, bm_pool_cnt, -1);
252 if (ret) {
253 dev_err(dev, "Failed to seed BPID range [%d..%d] (%d)\n",
254 0, bm_pool_cnt - 1, ret);
255 return ret;
258 return 0;
261 static const struct of_device_id fsl_bman_ids[] = {
263 .compatible = "fsl,bman",
268 static struct platform_driver fsl_bman_driver = {
269 .driver = {
270 .name = KBUILD_MODNAME,
271 .of_match_table = fsl_bman_ids,
272 .suppress_bind_attrs = true,
274 .probe = fsl_bman_probe,
277 builtin_platform_driver(fsl_bman_driver);