Lines Matching +full:rmtfs +full:- +full:mem
1 // SPDX-License-Identifier: GPL-2.0-only
13 #include <linux/dma-mapping.h>
54 return sprintf(buf, "%pa\n", &rmtfs_mem->addr); in qcom_rmtfs_mem_show()
56 return sprintf(buf, "%pa\n", &rmtfs_mem->size); in qcom_rmtfs_mem_show()
58 return sprintf(buf, "%d\n", rmtfs_mem->client_id); in qcom_rmtfs_mem_show()
60 return -EINVAL; in qcom_rmtfs_mem_show()
73 struct qcom_rmtfs_mem *rmtfs_mem = container_of(inode->i_cdev, in qcom_rmtfs_mem_open()
77 get_device(&rmtfs_mem->dev); in qcom_rmtfs_mem_open()
78 filp->private_data = rmtfs_mem; in qcom_rmtfs_mem_open()
85 struct qcom_rmtfs_mem *rmtfs_mem = filp->private_data; in qcom_rmtfs_mem_read()
87 if (*f_pos >= rmtfs_mem->size) in qcom_rmtfs_mem_read()
90 if (*f_pos + count >= rmtfs_mem->size) in qcom_rmtfs_mem_read()
91 count = rmtfs_mem->size - *f_pos; in qcom_rmtfs_mem_read()
93 if (copy_to_user(buf, rmtfs_mem->base + *f_pos, count)) in qcom_rmtfs_mem_read()
94 return -EFAULT; in qcom_rmtfs_mem_read()
104 struct qcom_rmtfs_mem *rmtfs_mem = filp->private_data; in qcom_rmtfs_mem_write()
106 if (*f_pos >= rmtfs_mem->size) in qcom_rmtfs_mem_write()
109 if (*f_pos + count >= rmtfs_mem->size) in qcom_rmtfs_mem_write()
110 count = rmtfs_mem->size - *f_pos; in qcom_rmtfs_mem_write()
112 if (copy_from_user(rmtfs_mem->base + *f_pos, buf, count)) in qcom_rmtfs_mem_write()
113 return -EFAULT; in qcom_rmtfs_mem_write()
121 struct qcom_rmtfs_mem *rmtfs_mem = filp->private_data; in qcom_rmtfs_mem_release()
123 put_device(&rmtfs_mem->dev); in qcom_rmtfs_mem_release()
129 .name = "rmtfs",
134 struct qcom_rmtfs_mem *rmtfs_mem = filep->private_data; in qcom_rmtfs_mem_mmap()
136 if (vma->vm_end - vma->vm_start > rmtfs_mem->size) { in qcom_rmtfs_mem_mmap()
137 dev_dbg(&rmtfs_mem->dev, in qcom_rmtfs_mem_mmap()
138 "vm_end[%lu] - vm_start[%lu] [%lu] > mem->size[%pa]\n", in qcom_rmtfs_mem_mmap()
139 vma->vm_end, vma->vm_start, in qcom_rmtfs_mem_mmap()
140 (vma->vm_end - vma->vm_start), &rmtfs_mem->size); in qcom_rmtfs_mem_mmap()
141 return -EINVAL; in qcom_rmtfs_mem_mmap()
144 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); in qcom_rmtfs_mem_mmap()
146 vma->vm_start, in qcom_rmtfs_mem_mmap()
147 rmtfs_mem->addr >> PAGE_SHIFT, in qcom_rmtfs_mem_mmap()
148 vma->vm_end - vma->vm_start, in qcom_rmtfs_mem_mmap()
149 vma->vm_page_prot); in qcom_rmtfs_mem_mmap()
173 struct device_node *node = pdev->dev.of_node; in qcom_rmtfs_mem_probe()
184 dev_err(&pdev->dev, "failed to acquire memory region\n"); in qcom_rmtfs_mem_probe()
185 return -EINVAL; in qcom_rmtfs_mem_probe()
188 ret = of_property_read_u32(node, "qcom,client-id", &client_id); in qcom_rmtfs_mem_probe()
190 dev_err(&pdev->dev, "failed to parse \"qcom,client-id\"\n"); in qcom_rmtfs_mem_probe()
197 return -ENOMEM; in qcom_rmtfs_mem_probe()
199 rmtfs_mem->addr = rmem->base; in qcom_rmtfs_mem_probe()
200 rmtfs_mem->client_id = client_id; in qcom_rmtfs_mem_probe()
201 rmtfs_mem->size = rmem->size; in qcom_rmtfs_mem_probe()
205 * that the rmtfs region isn't adjacent to other protected regions. in qcom_rmtfs_mem_probe()
207 if (of_property_read_bool(node, "qcom,use-guard-pages")) { in qcom_rmtfs_mem_probe()
208 rmtfs_mem->addr += SZ_4K; in qcom_rmtfs_mem_probe()
209 rmtfs_mem->size -= 2 * SZ_4K; in qcom_rmtfs_mem_probe()
212 device_initialize(&rmtfs_mem->dev); in qcom_rmtfs_mem_probe()
213 rmtfs_mem->dev.parent = &pdev->dev; in qcom_rmtfs_mem_probe()
214 rmtfs_mem->dev.groups = qcom_rmtfs_mem_groups; in qcom_rmtfs_mem_probe()
215 rmtfs_mem->dev.release = qcom_rmtfs_mem_release_device; in qcom_rmtfs_mem_probe()
217 rmtfs_mem->base = devm_memremap(&rmtfs_mem->dev, rmtfs_mem->addr, in qcom_rmtfs_mem_probe()
218 rmtfs_mem->size, MEMREMAP_WC); in qcom_rmtfs_mem_probe()
219 if (IS_ERR(rmtfs_mem->base)) { in qcom_rmtfs_mem_probe()
220 dev_err(&pdev->dev, "failed to remap rmtfs_mem region\n"); in qcom_rmtfs_mem_probe()
221 ret = PTR_ERR(rmtfs_mem->base); in qcom_rmtfs_mem_probe()
225 cdev_init(&rmtfs_mem->cdev, &qcom_rmtfs_mem_fops); in qcom_rmtfs_mem_probe()
226 rmtfs_mem->cdev.owner = THIS_MODULE; in qcom_rmtfs_mem_probe()
228 dev_set_name(&rmtfs_mem->dev, "qcom_rmtfs_mem%d", client_id); in qcom_rmtfs_mem_probe()
229 rmtfs_mem->dev.id = client_id; in qcom_rmtfs_mem_probe()
230 rmtfs_mem->dev.class = &rmtfs_class; in qcom_rmtfs_mem_probe()
231 rmtfs_mem->dev.devt = MKDEV(MAJOR(qcom_rmtfs_mem_major), client_id); in qcom_rmtfs_mem_probe()
233 ret = cdev_device_add(&rmtfs_mem->cdev, &rmtfs_mem->dev); in qcom_rmtfs_mem_probe()
235 dev_err(&pdev->dev, "failed to add cdev: %d\n", ret); in qcom_rmtfs_mem_probe()
240 if (num_vmids == -EINVAL) { in qcom_rmtfs_mem_probe()
244 dev_err(&pdev->dev, "failed to count qcom,vmid elements: %d\n", num_vmids); in qcom_rmtfs_mem_probe()
248 dev_warn(&pdev->dev, in qcom_rmtfs_mem_probe()
255 if (ret < 0 && ret != -EINVAL) { in qcom_rmtfs_mem_probe()
256 dev_err(&pdev->dev, "failed to parse qcom,vmid\n"); in qcom_rmtfs_mem_probe()
260 ret = -EPROBE_DEFER; in qcom_rmtfs_mem_probe()
272 rmtfs_mem->perms = BIT(QCOM_SCM_VMID_HLOS); in qcom_rmtfs_mem_probe()
273 ret = qcom_scm_assign_mem(rmtfs_mem->addr, rmtfs_mem->size, in qcom_rmtfs_mem_probe()
274 &rmtfs_mem->perms, perms, num_vmids + 1); in qcom_rmtfs_mem_probe()
276 dev_err(&pdev->dev, "assign memory failed\n"); in qcom_rmtfs_mem_probe()
281 dev_set_drvdata(&pdev->dev, rmtfs_mem); in qcom_rmtfs_mem_probe()
286 cdev_device_del(&rmtfs_mem->cdev, &rmtfs_mem->dev); in qcom_rmtfs_mem_probe()
288 put_device(&rmtfs_mem->dev); in qcom_rmtfs_mem_probe()
295 struct qcom_rmtfs_mem *rmtfs_mem = dev_get_drvdata(&pdev->dev); in qcom_rmtfs_mem_remove()
298 if (rmtfs_mem->perms) { in qcom_rmtfs_mem_remove()
302 qcom_scm_assign_mem(rmtfs_mem->addr, rmtfs_mem->size, in qcom_rmtfs_mem_remove()
303 &rmtfs_mem->perms, &perm, 1); in qcom_rmtfs_mem_remove()
306 cdev_device_del(&rmtfs_mem->cdev, &rmtfs_mem->dev); in qcom_rmtfs_mem_remove()
307 put_device(&rmtfs_mem->dev); in qcom_rmtfs_mem_remove()
311 { .compatible = "qcom,rmtfs-mem" },