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path: root/drivers/misc/habanalabs/habanalabs_ioctl.c
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Diffstat (limited to 'drivers/misc/habanalabs/habanalabs_ioctl.c')
-rw-r--r--drivers/misc/habanalabs/habanalabs_ioctl.c234
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/habanalabs_ioctl.c b/drivers/misc/habanalabs/habanalabs_ioctl.c
new file mode 100644
index 000000000000..2c2739a3c5ec
--- /dev/null
+++ b/drivers/misc/habanalabs/habanalabs_ioctl.c
@@ -0,0 +1,234 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2016-2019 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ */
+
+#include <uapi/misc/habanalabs.h>
+#include "habanalabs.h"
+
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+
+static int hw_ip_info(struct hl_device *hdev, struct hl_info_args *args)
+{
+ struct hl_info_hw_ip_info hw_ip = {0};
+ u32 size = args->return_size;
+ void __user *out = (void __user *) (uintptr_t) args->return_pointer;
+ struct asic_fixed_properties *prop = &hdev->asic_prop;
+ u64 sram_kmd_size, dram_kmd_size;
+
+ if ((!size) || (!out))
+ return -EINVAL;
+
+ sram_kmd_size = (prop->sram_user_base_address -
+ prop->sram_base_address);
+ dram_kmd_size = (prop->dram_user_base_address -
+ prop->dram_base_address);
+
+ hw_ip.device_id = hdev->asic_funcs->get_pci_id(hdev);
+ hw_ip.sram_base_address = prop->sram_user_base_address;
+ hw_ip.dram_base_address = prop->dram_user_base_address;
+ hw_ip.tpc_enabled_mask = prop->tpc_enabled_mask;
+ hw_ip.sram_size = prop->sram_size - sram_kmd_size;
+ hw_ip.dram_size = prop->dram_size - dram_kmd_size;
+ if (hw_ip.dram_size > 0)
+ hw_ip.dram_enabled = 1;
+ hw_ip.num_of_events = prop->num_of_events;
+ memcpy(hw_ip.armcp_version,
+ prop->armcp_info.armcp_version, VERSION_MAX_LEN);
+ hw_ip.armcp_cpld_version = __le32_to_cpu(prop->armcp_info.cpld_version);
+ hw_ip.psoc_pci_pll_nr = prop->psoc_pci_pll_nr;
+ hw_ip.psoc_pci_pll_nf = prop->psoc_pci_pll_nf;
+ hw_ip.psoc_pci_pll_od = prop->psoc_pci_pll_od;
+ hw_ip.psoc_pci_pll_div_factor = prop->psoc_pci_pll_div_factor;
+
+ return copy_to_user(out, &hw_ip,
+ min((size_t)size, sizeof(hw_ip))) ? -EFAULT : 0;
+}
+
+static int hw_events_info(struct hl_device *hdev, struct hl_info_args *args)
+{
+ u32 size, max_size = args->return_size;
+ void __user *out = (void __user *) (uintptr_t) args->return_pointer;
+ void *arr;
+
+ if ((!max_size) || (!out))
+ return -EINVAL;
+
+ arr = hdev->asic_funcs->get_events_stat(hdev, &size);
+
+ return copy_to_user(out, arr, min(max_size, size)) ? -EFAULT : 0;
+}
+
+static int dram_usage_info(struct hl_device *hdev, struct hl_info_args *args)
+{
+ struct hl_info_dram_usage dram_usage = {0};
+ u32 max_size = args->return_size;
+ void __user *out = (void __user *) (uintptr_t) args->return_pointer;
+ struct asic_fixed_properties *prop = &hdev->asic_prop;
+ u64 dram_kmd_size;
+
+ if ((!max_size) || (!out))
+ return -EINVAL;
+
+ dram_kmd_size = (prop->dram_user_base_address -
+ prop->dram_base_address);
+ dram_usage.dram_free_mem = (prop->dram_size - dram_kmd_size) -
+ atomic64_read(&hdev->dram_used_mem);
+ dram_usage.ctx_dram_mem = atomic64_read(&hdev->user_ctx->dram_phys_mem);
+
+ return copy_to_user(out, &dram_usage,
+ min((size_t) max_size, sizeof(dram_usage))) ? -EFAULT : 0;
+}
+
+static int hw_idle(struct hl_device *hdev, struct hl_info_args *args)
+{
+ struct hl_info_hw_idle hw_idle = {0};
+ u32 max_size = args->return_size;
+ void __user *out = (void __user *) (uintptr_t) args->return_pointer;
+
+ if ((!max_size) || (!out))
+ return -EINVAL;
+
+ hw_idle.is_idle = hdev->asic_funcs->is_device_idle(hdev);
+
+ return copy_to_user(out, &hw_idle,
+ min((size_t) max_size, sizeof(hw_idle))) ? -EFAULT : 0;
+}
+
+static int hl_info_ioctl(struct hl_fpriv *hpriv, void *data)
+{
+ struct hl_info_args *args = data;
+ struct hl_device *hdev = hpriv->hdev;
+ int rc;
+
+ if (hl_device_disabled_or_in_reset(hdev)) {
+ dev_err(hdev->dev,
+ "Device is disabled or in reset. Can't execute INFO IOCTL\n");
+ return -EBUSY;
+ }
+
+ switch (args->op) {
+ case HL_INFO_HW_IP_INFO:
+ rc = hw_ip_info(hdev, args);
+ break;
+
+ case HL_INFO_HW_EVENTS:
+ rc = hw_events_info(hdev, args);
+ break;
+
+ case HL_INFO_DRAM_USAGE:
+ rc = dram_usage_info(hdev, args);
+ break;
+
+ case HL_INFO_HW_IDLE:
+ rc = hw_idle(hdev, args);
+ break;
+
+ default:
+ dev_err(hdev->dev, "Invalid request %d\n", args->op);
+ rc = -ENOTTY;
+ break;
+ }
+
+ return rc;
+}
+
+#define HL_IOCTL_DEF(ioctl, _func) \
+ [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func}
+
+static const struct hl_ioctl_desc hl_ioctls[] = {
+ HL_IOCTL_DEF(HL_IOCTL_INFO, hl_info_ioctl),
+ HL_IOCTL_DEF(HL_IOCTL_CB, hl_cb_ioctl),
+ HL_IOCTL_DEF(HL_IOCTL_CS, hl_cs_ioctl),
+ HL_IOCTL_DEF(HL_IOCTL_WAIT_CS, hl_cs_wait_ioctl),
+ HL_IOCTL_DEF(HL_IOCTL_MEMORY, hl_mem_ioctl)
+};
+
+#define HL_CORE_IOCTL_COUNT ARRAY_SIZE(hl_ioctls)
+
+long hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
+{
+ struct hl_fpriv *hpriv = filep->private_data;
+ struct hl_device *hdev = hpriv->hdev;
+ hl_ioctl_t *func;
+ const struct hl_ioctl_desc *ioctl = NULL;
+ unsigned int nr = _IOC_NR(cmd);
+ char stack_kdata[128] = {0};
+ char *kdata = NULL;
+ unsigned int usize, asize;
+ int retcode;
+
+ if (hdev->hard_reset_pending) {
+ dev_crit_ratelimited(hdev->dev,
+ "Device HARD reset pending! Please close FD\n");
+ return -ENODEV;
+ }
+
+ if ((nr >= HL_COMMAND_START) && (nr < HL_COMMAND_END)) {
+ u32 hl_size;
+
+ ioctl = &hl_ioctls[nr];
+
+ hl_size = _IOC_SIZE(ioctl->cmd);
+ usize = asize = _IOC_SIZE(cmd);
+ if (hl_size > asize)
+ asize = hl_size;
+
+ cmd = ioctl->cmd;
+ } else {
+ dev_err(hdev->dev, "invalid ioctl: pid=%d, nr=0x%02x\n",
+ task_pid_nr(current), nr);
+ return -ENOTTY;
+ }
+
+ /* Do not trust userspace, use our own definition */
+ func = ioctl->func;
+
+ if (unlikely(!func)) {
+ dev_dbg(hdev->dev, "no function\n");
+ retcode = -ENOTTY;
+ goto out_err;
+ }
+
+ if (cmd & (IOC_IN | IOC_OUT)) {
+ if (asize <= sizeof(stack_kdata)) {
+ kdata = stack_kdata;
+ } else {
+ kdata = kzalloc(asize, GFP_KERNEL);
+ if (!kdata) {
+ retcode = -ENOMEM;
+ goto out_err;
+ }
+ }
+ }
+
+ if (cmd & IOC_IN) {
+ if (copy_from_user(kdata, (void __user *)arg, usize)) {
+ retcode = -EFAULT;
+ goto out_err;
+ }
+ } else if (cmd & IOC_OUT) {
+ memset(kdata, 0, usize);
+ }
+
+ retcode = func(hpriv, kdata);
+
+ if (cmd & IOC_OUT)
+ if (copy_to_user((void __user *)arg, kdata, usize))
+ retcode = -EFAULT;
+
+out_err:
+ if (retcode)
+ dev_dbg(hdev->dev,
+ "error in ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
+ task_pid_nr(current), cmd, nr);
+
+ if (kdata != stack_kdata)
+ kfree(kdata);
+
+ return retcode;
+}