diff options
| -rw-r--r-- | drivers/staging/rdma/hfi1/file_ops.c | 168 |
1 files changed, 1 insertions, 167 deletions
diff --git a/drivers/staging/rdma/hfi1/file_ops.c b/drivers/staging/rdma/hfi1/file_ops.c index 518cd891b63d..eb66befd51fc 100644 --- a/drivers/staging/rdma/hfi1/file_ops.c +++ b/drivers/staging/rdma/hfi1/file_ops.c @@ -1497,163 +1497,10 @@ done: return ret; } -static int ui_open(struct inode *inode, struct file *filp) -{ - struct hfi1_devdata *dd; - - dd = container_of(inode->i_cdev, struct hfi1_devdata, ui_cdev); - filp->private_data = dd; /* for other methods */ - return 0; -} - -static int ui_release(struct inode *inode, struct file *filp) -{ - /* nothing to do */ - return 0; -} - -static loff_t ui_lseek(struct file *filp, loff_t offset, int whence) -{ - struct hfi1_devdata *dd = filp->private_data; - - return fixed_size_llseek(filp, offset, whence, - (dd->kregend - dd->kregbase) + DC8051_DATA_MEM_SIZE); -} - -/* NOTE: assumes unsigned long is 8 bytes */ -static ssize_t ui_read(struct file *filp, char __user *buf, size_t count, - loff_t *f_pos) -{ - struct hfi1_devdata *dd = filp->private_data; - void __iomem *base = dd->kregbase; - unsigned long total, csr_off, - barlen = (dd->kregend - dd->kregbase); - u64 data; - - /* only read 8 byte quantities */ - if ((count % 8) != 0) - return -EINVAL; - /* offset must be 8-byte aligned */ - if ((*f_pos % 8) != 0) - return -EINVAL; - /* destination buffer must be 8-byte aligned */ - if ((unsigned long)buf % 8 != 0) - return -EINVAL; - /* must be in range */ - if (*f_pos + count > (barlen + DC8051_DATA_MEM_SIZE)) - return -EINVAL; - /* only set the base if we are not starting past the BAR */ - if (*f_pos < barlen) - base += *f_pos; - csr_off = *f_pos; - for (total = 0; total < count; total += 8, csr_off += 8) { - /* accessing LCB CSRs requires more checks */ - if (is_lcb_offset(csr_off)) { - if (read_lcb_csr(dd, csr_off, (u64 *)&data)) - break; /* failed */ - } - /* - * Cannot read ASIC GPIO/QSFP* clear and force CSRs without a - * false parity error. Avoid the whole issue by not reading - * them. These registers are defined as having a read value - * of 0. - */ - else if (csr_off == ASIC_GPIO_CLEAR || - csr_off == ASIC_GPIO_FORCE || - csr_off == ASIC_QSFP1_CLEAR || - csr_off == ASIC_QSFP1_FORCE || - csr_off == ASIC_QSFP2_CLEAR || - csr_off == ASIC_QSFP2_FORCE) - data = 0; - else if (csr_off >= barlen) { - /* - * read_8051_data can read more than just 8 bytes at - * a time. However, folding this into the loop and - * handling the reads in 8 byte increments allows us - * to smoothly transition from chip memory to 8051 - * memory. - */ - if (read_8051_data(dd, - (u32)(csr_off - barlen), - sizeof(data), &data)) - break; /* failed */ - } else - data = readq(base + total); - if (put_user(data, (unsigned long __user *)(buf + total))) - break; - } - *f_pos += total; - return total; -} - -/* NOTE: assumes unsigned long is 8 bytes */ -static ssize_t ui_write(struct file *filp, const char __user *buf, - size_t count, loff_t *f_pos) -{ - struct hfi1_devdata *dd = filp->private_data; - void __iomem *base; - unsigned long total, data, csr_off; - int in_lcb; - - /* only write 8 byte quantities */ - if ((count % 8) != 0) - return -EINVAL; - /* offset must be 8-byte aligned */ - if ((*f_pos % 8) != 0) - return -EINVAL; - /* source buffer must be 8-byte aligned */ - if ((unsigned long)buf % 8 != 0) - return -EINVAL; - /* must be in range */ - if (*f_pos + count > dd->kregend - dd->kregbase) - return -EINVAL; - - base = (void __iomem *)dd->kregbase + *f_pos; - csr_off = *f_pos; - in_lcb = 0; - for (total = 0; total < count; total += 8, csr_off += 8) { - if (get_user(data, (unsigned long __user *)(buf + total))) - break; - /* accessing LCB CSRs requires a special procedure */ - if (is_lcb_offset(csr_off)) { - if (!in_lcb) { - int ret = acquire_lcb_access(dd, 1); - - if (ret) - break; - in_lcb = 1; - } - } else { - if (in_lcb) { - release_lcb_access(dd, 1); - in_lcb = 0; - } - } - writeq(data, base + total); - } - if (in_lcb) - release_lcb_access(dd, 1); - *f_pos += total; - return total; -} - -static const struct file_operations ui_file_ops = { - .owner = THIS_MODULE, - .llseek = ui_lseek, - .read = ui_read, - .write = ui_write, - .open = ui_open, - .release = ui_release, -}; - -#define UI_OFFSET 192 /* device minor offset for UI devices */ -static int create_ui = 1; - static void user_remove(struct hfi1_devdata *dd) { hfi1_cdev_cleanup(&dd->user_cdev, &dd->user_device); - hfi1_cdev_cleanup(&dd->ui_cdev, &dd->ui_device); } static int user_add(struct hfi1_devdata *dd) @@ -1666,21 +1513,8 @@ static int user_add(struct hfi1_devdata *dd) &dd->user_cdev, &dd->user_device, true); if (ret) - goto done; + user_remove(dd); - if (create_ui) { - snprintf(name, sizeof(name), - "%s_ui%d", class_name(), dd->unit); - ret = hfi1_cdev_init(dd->unit + UI_OFFSET, name, &ui_file_ops, - &dd->ui_cdev, &dd->ui_device, - false); - if (ret) - goto done; - } - - return 0; -done: - user_remove(dd); return ret; } |