1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Generic on-chip SRAM allocation driver
19 #include <soc/at91/atmel-secumod.h>
33 	mutex_lock(&part->lock);  in sram_read()
34 	memcpy_fromio(buf, part->base + pos, count);  in sram_read()
35 	mutex_unlock(&part->lock);  in sram_read()
48 	mutex_lock(&part->lock);  in sram_write()
49 	memcpy_toio(part->base + pos, buf, count);  in sram_write()
50 	mutex_unlock(&part->lock);  in sram_write()
60 	part->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),  in sram_add_pool()
61 					  NUMA_NO_NODE, block->label);  in sram_add_pool()
62 	if (IS_ERR(part->pool))  in sram_add_pool()
63 		return PTR_ERR(part->pool);  in sram_add_pool()
65 	ret = gen_pool_add_virt(part->pool, (unsigned long)part->base, start,  in sram_add_pool()
66 				block->size, NUMA_NO_NODE);  in sram_add_pool()
68 		dev_err(sram->dev, "failed to register subpool: %d\n", ret);  in sram_add_pool()
78 	sysfs_bin_attr_init(&part->battr);  in sram_add_export()
79 	part->battr.attr.name = devm_kasprintf(sram->dev, GFP_KERNEL,  in sram_add_export()
82 	if (!part->battr.attr.name)  in sram_add_export()
83 		return -ENOMEM;  in sram_add_export()
85 	part->battr.attr.mode = S_IRUSR | S_IWUSR;  in sram_add_export()
86 	part->battr.read = sram_read;  in sram_add_export()
87 	part->battr.write = sram_write;  in sram_add_export()
88 	part->battr.size = block->size;  in sram_add_export()
90 	return device_create_bin_file(sram->dev, &part->battr);  in sram_add_export()
97 	struct sram_partition *part = &sram->partition[sram->partitions];  in sram_add_partition()
99 	mutex_init(&part->lock);  in sram_add_partition()
101 	if (sram->config && sram->config->map_only_reserved) {  in sram_add_partition()
104 		if (sram->no_memory_wc)  in sram_add_partition()
105 			virt_base = devm_ioremap_resource(sram->dev, &block->res);  in sram_add_partition()
107 			virt_base = devm_ioremap_resource_wc(sram->dev, &block->res);  in sram_add_partition()
110 			dev_err(sram->dev, "could not map SRAM at %pr\n", &block->res);  in sram_add_partition()
114 		part->base = virt_base;  in sram_add_partition()
116 		part->base = sram->virt_base + block->start;  in sram_add_partition()
119 	if (block->pool) {  in sram_add_partition()
124 	if (block->export) {  in sram_add_partition()
129 	if (block->protect_exec) {  in sram_add_partition()
141 	sram->partitions++;  in sram_add_partition()
150 	if (!sram->partitions)  in sram_free_partitions()
153 	part = &sram->partition[sram->partitions - 1];  in sram_free_partitions()
154 	for (; sram->partitions; sram->partitions--, part--) {  in sram_free_partitions()
155 		if (part->battr.size)  in sram_free_partitions()
156 			device_remove_bin_file(sram->dev, &part->battr);  in sram_free_partitions()
158 		if (part->pool &&  in sram_free_partitions()
159 		    gen_pool_avail(part->pool) < gen_pool_size(part->pool))  in sram_free_partitions()
160 			dev_err(sram->dev, "removed pool while SRAM allocated\n");  in sram_free_partitions()
170 	return ra->start - rb->start;  in sram_reserve_cmp()
175 	struct device_node *np = sram->dev->of_node, *child;  in sram_reserve_regions()
194 		return -ENOMEM;  in sram_reserve_regions()
202 			dev_err(sram->dev,  in sram_reserve_regions()
208 		if (child_res.start < res->start || child_res.end > res->end) {  in sram_reserve_regions()
209 			dev_err(sram->dev,  in sram_reserve_regions()
212 			ret = -EINVAL;  in sram_reserve_regions()
216 		block->start = child_res.start - res->start;  in sram_reserve_regions()
217 		block->size = resource_size(&child_res);  in sram_reserve_regions()
218 		block->res = child_res;  in sram_reserve_regions()
219 		list_add_tail(&block->list, &reserve_list);  in sram_reserve_regions()
222 			block->export = true;  in sram_reserve_regions()
225 			block->pool = true;  in sram_reserve_regions()
227 		if (of_find_property(child, "protect-exec", NULL))  in sram_reserve_regions()
228 			block->protect_exec = true;  in sram_reserve_regions()
230 		if ((block->export || block->pool || block->protect_exec) &&  in sram_reserve_regions()
231 		    block->size) {  in sram_reserve_regions()
236 			if (ret && ret != -EINVAL) {  in sram_reserve_regions()
237 				dev_err(sram->dev,  in sram_reserve_regions()
243 				label = child->name;  in sram_reserve_regions()
245 			block->label = devm_kstrdup(sram->dev,  in sram_reserve_regions()
247 			if (!block->label) {  in sram_reserve_regions()
248 				ret = -ENOMEM;  in sram_reserve_regions()
252 			dev_dbg(sram->dev, "found %sblock '%s' 0x%x-0x%x\n",  in sram_reserve_regions()
253 				block->export ? "exported " : "", block->label,  in sram_reserve_regions()
254 				block->start, block->start + block->size);  in sram_reserve_regions()
256 			dev_dbg(sram->dev, "found reserved block 0x%x-0x%x\n",  in sram_reserve_regions()
257 				block->start, block->start + block->size);  in sram_reserve_regions()
265 	rblocks[nblocks - 1].start = size;  in sram_reserve_regions()
266 	rblocks[nblocks - 1].size = 0;  in sram_reserve_regions()
267 	list_add_tail(&rblocks[nblocks - 1].list, &reserve_list);  in sram_reserve_regions()
272 		sram->partition = devm_kcalloc(sram->dev,  in sram_reserve_regions()
273 				       exports, sizeof(*sram->partition),  in sram_reserve_regions()
275 		if (!sram->partition) {  in sram_reserve_regions()
276 			ret = -ENOMEM;  in sram_reserve_regions()
284 		if (block->start < cur_start) {  in sram_reserve_regions()
285 			dev_err(sram->dev,  in sram_reserve_regions()
287 				block->start, cur_start);  in sram_reserve_regions()
288 			ret = -EINVAL;  in sram_reserve_regions()
293 		if ((block->export || block->pool || block->protect_exec) &&  in sram_reserve_regions()
294 		    block->size) {  in sram_reserve_regions()
296 						 res->start + block->start);  in sram_reserve_regions()
304 		if (block->start == cur_start) {  in sram_reserve_regions()
305 			cur_start = block->start + block->size;  in sram_reserve_regions()
314 		cur_size = block->start - cur_start;  in sram_reserve_regions()
316 		if (sram->pool) {  in sram_reserve_regions()
317 			dev_dbg(sram->dev, "adding chunk 0x%lx-0x%lx\n",  in sram_reserve_regions()
320 			ret = gen_pool_add_virt(sram->pool,  in sram_reserve_regions()
321 					(unsigned long)sram->virt_base + cur_start,  in sram_reserve_regions()
322 					res->start + cur_start, cur_size, -1);  in sram_reserve_regions()
330 		cur_start = block->start + block->size;  in sram_reserve_regions()
345 	regmap = syscon_regmap_lookup_by_compatible("atmel,sama5d2-secumod");  in atmel_securam_wait()
347 		return -ENODEV;  in atmel_securam_wait()
359  * SYSRAM contains areas that are not accessible by the
363  * SYSRAM specified in the device tree.
370 	{ .compatible = "mmio-sram" },
371 	{ .compatible = "atmel,sama5d2-securam", .data = &atmel_securam_config },
372 	{ .compatible = "nvidia,tegra186-sysram", .data = &tegra_sysram_config },
373 	{ .compatible = "nvidia,tegra194-sysram", .data = &tegra_sysram_config },
374 	{ .compatible = "nvidia,tegra234-sysram", .data = &tegra_sysram_config },
385 	config = of_device_get_match_data(&pdev->dev);  in sram_probe()
387 	sram = devm_kzalloc(&pdev->dev, sizeof(*sram), GFP_KERNEL);  in sram_probe()
389 		return -ENOMEM;  in sram_probe()
391 	sram->dev = &pdev->dev;  in sram_probe()
392 	sram->no_memory_wc = of_property_read_bool(pdev->dev.of_node, "no-memory-wc");  in sram_probe()
393 	sram->config = config;  in sram_probe()
395 	if (!config || !config->map_only_reserved) {  in sram_probe()
397 		if (sram->no_memory_wc)  in sram_probe()
398 			sram->virt_base = devm_ioremap_resource(&pdev->dev, res);  in sram_probe()
400 			sram->virt_base = devm_ioremap_resource_wc(&pdev->dev, res);  in sram_probe()
401 		if (IS_ERR(sram->virt_base)) {  in sram_probe()
402 			dev_err(&pdev->dev, "could not map SRAM registers\n");  in sram_probe()
403 			return PTR_ERR(sram->virt_base);  in sram_probe()
406 		sram->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),  in sram_probe()
408 		if (IS_ERR(sram->pool))  in sram_probe()
409 			return PTR_ERR(sram->pool);  in sram_probe()
412 	sram->clk = devm_clk_get(sram->dev, NULL);  in sram_probe()
413 	if (IS_ERR(sram->clk))  in sram_probe()
414 		sram->clk = NULL;  in sram_probe()
416 		clk_prepare_enable(sram->clk);  in sram_probe()
425 	if (config && config->init) {  in sram_probe()
426 		ret = config->init();  in sram_probe()
431 	if (sram->pool)  in sram_probe()
432 		dev_dbg(sram->dev, "SRAM pool: %zu KiB @ 0x%p\n",  in sram_probe()
433 			gen_pool_size(sram->pool) / 1024, sram->virt_base);  in sram_probe()
440 	if (sram->clk)  in sram_probe()
441 		clk_disable_unprepare(sram->clk);  in sram_probe()
452 	if (sram->pool && gen_pool_avail(sram->pool) < gen_pool_size(sram->pool))  in sram_remove()
453 		dev_err(sram->dev, "removed while SRAM allocated\n");  in sram_remove()
455 	if (sram->clk)  in sram_remove()
456 		clk_disable_unprepare(sram->clk);  in sram_remove()