soc: qcom: hab: add hab statistics support

This allows user to read back hab runtime information.

Change-Id: Id266dd17b9c9d38f0e93aa600510ae1c6b12cca5
Signed-off-by: Yong Ding <yongding@codeaurora.org>

drivers/soc/qcom/hab/Makefile

@@ -9,7 +9,8 @@ msm_hab-objs = \
 	hab_mem_linux.o \
 	hab_pipe.o \
 	hab_parser.o \
-	khab_test.o
+	khab_test.o \
+	hab_stat.o
 
 ifdef CONFIG_GHS_VMM
 msm_hab_hyp-objs = \

drivers/soc/qcom/hab/hab.c

@@ -21,7 +21,7 @@
 	.openlock = __SPIN_LOCK_UNLOCKED(&hab_devices[__num__].openlock)\
 	}
 
-static const char hab_info_str[] = "Change: 16239527 Revision: #65";
+static const char hab_info_str[] = "Change: 16764735 Revision: #76";
 
 /*
  * The following has to match habmm definitions, order does not matter if
@@ -283,7 +283,7 @@ struct virtual_channel *frontend_open(struct uhab_context *ctx,
 		pr_err("vchan alloc failed\n");
 		ret = -ENOMEM;
 		goto err;
-	} else
+	}
 
 	/* Send Init sequence */
 	hab_open_request_init(&request, HAB_PAYLOAD_TYPE_INIT, pchan,
@@ -667,6 +667,7 @@ int hab_vchan_open(struct uhab_context *ctx,
 			}
 		} else {
 			pr_err("failed to find device, mmid %d\n", mmid);
+			return -ENODEV;
 		}
 	}
 
@@ -1368,6 +1369,9 @@ static int __init hab_init(void)
 		} else
 			set_dma_ops(hab_driver.dev, &hab_dma_ops);
 	}
+
+	hab_stat_init(&hab_driver);
+
 	return result;
 
 err:
@@ -1387,6 +1391,7 @@ static void __exit hab_exit(void)
 	dev_t dev;
 
 	hab_hypervisor_unregister();
+	hab_stat_deinit(&hab_driver);
 	hab_ctx_put(hab_driver.kctx);
 	dev = MKDEV(MAJOR(hab_driver.major), 0);
 	device_destroy(hab_driver.class, dev);

drivers/soc/qcom/hab/hab.h

@@ -43,6 +43,8 @@
 #include <linux/dma-mapping.h>
 #include <linux/jiffies.h>
 #include <linux/reboot.h>
+#include <linux/kobject.h>
+#include <linux/sysfs.h>
 
 enum hab_payload_type {
 	HAB_PAYLOAD_TYPE_MSG = 0x0,
@@ -338,6 +340,8 @@ struct hab_driver {
 	int b_loopback;
 
 	void *hyp_priv; /* hypervisor plug-in storage */
+
+	void *hab_vmm_handle;
 };
 
 struct virtual_channel {
@@ -412,6 +416,7 @@ int hab_vchan_recv(struct uhab_context *ctx,
 void hab_vchan_stop(struct virtual_channel *vchan);
 void hab_vchans_stop(struct physical_channel *pchan);
 void hab_vchan_stop_notify(struct virtual_channel *vchan);
+void hab_vchans_empty_wait(int vmid);
 
 int hab_mem_export(struct uhab_context *ctx,
 		struct hab_export *param, int kernel);
@@ -456,7 +461,7 @@ int habmm_imp_hyp_unmap(void *imp_ctx, struct export_desc *exp, int kernel);
 
 int habmem_imp_hyp_mmap(struct file *flip, struct vm_area_struct *vma);
 
-
+int habmm_imp_hyp_map_check(void *imp_ctx, struct export_desc *exp);
 
 void hab_msg_free(struct hab_message *message);
 int hab_msg_dequeue(struct virtual_channel *vchan,
@@ -563,6 +568,15 @@ int hab_open_cancel_notify(struct hab_open_request *request);
 int hab_open_receive_cancel(struct physical_channel *pchan,
 		size_t sizebytes);
 
+int hab_stat_init(struct hab_driver *drv);
+int hab_stat_deinit(struct hab_driver *drv);
+int hab_stat_show_vchan(struct hab_driver *drv, char *buf, int sz);
+int hab_stat_show_ctx(struct hab_driver *drv, char *buf, int sz);
+int hab_stat_show_expimp(struct hab_driver *drv, int pid, char *buf, int sz);
+
+int hab_stat_init_sub(struct hab_driver *drv);
+int hab_stat_deinit_sub(struct hab_driver *drv);
+
 /* Global singleton HAB instance */
 extern struct hab_driver hab_driver;
 

drivers/soc/qcom/hab/hab_mem_linux.c

@@ -751,3 +751,22 @@ int habmem_imp_hyp_mmap(struct file *filp, struct vm_area_struct *vma)
 
 	return 0;
 }
+
+int habmm_imp_hyp_map_check(void *imp_ctx, struct export_desc *exp)
+{
+	struct importer_context *priv = imp_ctx;
+	struct pages_list *pglist;
+	int found = 0;
+
+	read_lock(&priv->implist_lock);
+	list_for_each_entry(pglist, &priv->imp_list, list) {
+		if (pglist->export_id == exp->export_id &&
+			pglist->vcid == exp->vcid_remote) {
+			found = 1;
+			break;
+		}
+	}
+	read_unlock(&priv->implist_lock);
+
+	return found;
+}

drivers/soc/qcom/hab/hab_mimex.c

@@ -104,8 +104,8 @@ static struct export_desc *habmem_add_export(struct virtual_channel *vchan,
 	exp->vchan = vchan;
 	exp->vcid_local = vchan->id;
 	exp->vcid_remote = vchan->otherend_id;
-	exp->domid_local = -1; /* dom id, provided on the importer */
-	exp->domid_remote = vchan->pchan->dom_id;
+	exp->domid_local = vchan->pchan->vmid_local;
+	exp->domid_remote = vchan->pchan->vmid_remote;
 	exp->ctx = vchan->ctx;
 	exp->pchan = vchan->pchan;
 
@@ -124,7 +124,8 @@ void habmem_remove_export(struct export_desc *exp)
 	struct uhab_context *ctx;
 
 	if (!exp || !exp->ctx || !exp->pchan) {
-		pr_err("failed to find valid info in exp %pK\n", exp);
+		pr_err("failed to find valid info in exp %pK ctx %pK pchan %pK\n",
+			   exp, exp->ctx, exp->pchan);
 		return;
 	}
 

drivers/soc/qcom/hab/hab_qvm.h

@@ -49,5 +49,5 @@ struct qvm_channel {
 
 void *qnx_hyp_rx_dispatch(void *data);
 void hab_pipe_reset(struct physical_channel *pchan);
-
+void habhyp_notify(void *commdev);
 #endif /* __HAB_QNX_H */

drivers/soc/qcom/hab/hab_stat.c

@@ -0,0 +1,167 @@
+/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#include "hab.h"
+#include "hab_grantable.h"
+
+#define MAX_LINE_SIZE 128
+
+int hab_stat_init(struct hab_driver *driver)
+{
+	return hab_stat_init_sub(driver);
+}
+
+int hab_stat_deinit(struct hab_driver *driver)
+{
+	return hab_stat_deinit_sub(driver);
+}
+
+/*
+ * If all goes well the return value is the formated print and concatenated
+ * original dest string.
+ */
+static int hab_stat_buffer_print(char *dest,
+		int dest_size, const char *fmt, ...)
+{
+	va_list args;
+	char line[MAX_LINE_SIZE];
+	int ret;
+
+	va_start(args, fmt);
+	ret = vsnprintf(line, sizeof(line), fmt, args);
+	va_end(args);
+	if (ret > 0)
+		ret = strlcat(dest, line, dest_size);
+	return ret;
+}
+
+int hab_stat_show_vchan(struct hab_driver *driver,
+		char *buf, int size)
+{
+	int i, ret = 0;
+
+	ret = strlcpy(buf, "", size);
+	for (i = 0; i < driver->ndevices; i++) {
+		struct hab_device *dev = &driver->devp[i];
+		struct physical_channel *pchan;
+		struct virtual_channel *vc;
+
+		spin_lock_bh(&dev->pchan_lock);
+		list_for_each_entry(pchan, &dev->pchannels, node) {
+			if (!pchan->vcnt)
+				continue;
+
+			ret = hab_stat_buffer_print(buf, size,
+				"mmid %s role %d local %d remote %d vcnt %d:\n",
+				pchan->name, pchan->is_be, pchan->vmid_local,
+				pchan->vmid_remote, pchan->vcnt);
+
+			read_lock(&pchan->vchans_lock);
+			list_for_each_entry(vc, &pchan->vchannels, pnode) {
+				ret = hab_stat_buffer_print(buf, size,
+						 "%08X ", vc->id);
+			}
+			ret = hab_stat_buffer_print(buf, size, "\n");
+			read_unlock(&pchan->vchans_lock);
+		}
+		spin_unlock_bh(&dev->pchan_lock);
+	}
+
+	return ret;
+}
+
+int hab_stat_show_ctx(struct hab_driver *driver,
+		char *buf, int size)
+{
+	int ret = 0;
+	struct uhab_context *ctx;
+
+	ret = strlcpy(buf, "", size);
+
+	spin_lock_bh(&hab_driver.drvlock);
+	ret = hab_stat_buffer_print(buf, size,
+					"Total contexts %d\n",
+					driver->ctx_cnt);
+	list_for_each_entry(ctx, &hab_driver.uctx_list, node) {
+		ret = hab_stat_buffer_print(buf, size,
+			"ctx %d K %d close %d vc %d exp %d imp %d open %d\n",
+			ctx->owner, ctx->kernel, ctx->closing,
+			ctx->vcnt, ctx->export_total,
+			ctx->import_total, ctx->pending_cnt);
+	}
+	spin_unlock_bh(&hab_driver.drvlock);
+
+	return ret;
+}
+
+static int get_pft_tbl_total_size(struct compressed_pfns *pfn_table)
+{
+	int i, total_size = 0;
+
+	for (i = 0; i < pfn_table->nregions; i++)
+		total_size += pfn_table->region[i].size * PAGE_SIZE;
+
+	return total_size;
+}
+
+static int print_ctx_total_expimp(struct uhab_context *ctx,
+		char *buf, int size)
+{
+	struct compressed_pfns *pfn_table;
+	int exp_total = 0, imp_total = 0;
+	int exp_cnt = 0, imp_cnt = 0;
+	struct export_desc *exp;
+
+	read_lock(&ctx->exp_lock);
+	list_for_each_entry(exp, &ctx->exp_whse, node) {
+		pfn_table =	(struct compressed_pfns *)exp->payload;
+		exp_total += get_pft_tbl_total_size(pfn_table);
+		exp_cnt++;
+	}
+	read_unlock(&ctx->exp_lock);
+
+	spin_lock_bh(&ctx->imp_lock);
+	list_for_each_entry(exp, &ctx->imp_whse, node) {
+		if (habmm_imp_hyp_map_check(ctx->import_ctx, exp)) {
+			pfn_table =	(struct compressed_pfns *)exp->payload;
+			imp_total += get_pft_tbl_total_size(pfn_table);
+			imp_cnt++;
+		}
+	}
+	spin_unlock_bh(&ctx->imp_lock);
+
+	if (exp_cnt || exp_total || imp_cnt || imp_total)
+		return hab_stat_buffer_print(buf, size,
+				"ctx %d exp %d size %d imp %d size %d\n",
+				ctx->owner, exp_cnt, exp_total,
+				imp_cnt, imp_total);
+	else
+		return 0;
+}
+
+int hab_stat_show_expimp(struct hab_driver *driver,
+		int pid, char *buf, int size)
+{
+	struct uhab_context *ctx;
+	int ret;
+
+	ret = strlcpy(buf, "", size);
+
+	spin_lock_bh(&hab_driver.drvlock);
+	list_for_each_entry(ctx, &hab_driver.uctx_list, node) {
+		if (pid == ctx->owner)
+			ret = print_ctx_total_expimp(ctx, buf, size);
+	}
+	spin_unlock_bh(&hab_driver.drvlock);
+
+	return ret;
+}

drivers/soc/qcom/hab/hab_vchan.c

@@ -194,6 +194,55 @@ void hab_vchan_stop_notify(struct virtual_channel *vchan)
 	hab_vchan_stop(vchan);
 }
 
+static int hab_vchans_per_pchan_empty(struct physical_channel *pchan)
+{
+	int empty;
+
+	read_lock(&pchan->vchans_lock);
+	empty = list_empty(&pchan->vchannels);
+	read_unlock(&pchan->vchans_lock);
+
+	return empty;
+}
+
+static int hab_vchans_empty(int vmid)
+{
+	int i, empty = 1;
+	struct physical_channel *pchan;
+	struct hab_device *hab_dev;
+
+	for (i = 0; i < hab_driver.ndevices; i++) {
+		hab_dev = &hab_driver.devp[i];
+
+		spin_lock_bh(&hab_dev->pchan_lock);
+		list_for_each_entry(pchan, &hab_dev->pchannels, node) {
+			if (pchan->vmid_remote == vmid) {
+				if (!hab_vchans_per_pchan_empty(pchan)) {
+					empty = 0;
+					spin_unlock_bh(&hab_dev->pchan_lock);
+					break;
+				}
+			}
+		}
+		spin_unlock_bh(&hab_dev->pchan_lock);
+	}
+
+	return empty;
+}
+
+/*
+ * block until all vchans of a given GVM are explicitly closed
+ * with habmm_socket_close() by hab clients themselves
+ */
+void hab_vchans_empty_wait(int vmid)
+{
+	pr_info("waiting for GVM%d's sockets closure\n", vmid);
+
+	while (!hab_vchans_empty(vmid))
+		schedule();
+
+	pr_info("all of GVM%d's sockets are closed\n", vmid);
+}
 
 int hab_vchan_find_domid(struct virtual_channel *vchan)
 {

drivers/soc/qcom/hab/khab_test.c

@@ -11,13 +11,12 @@
  *
  */
 #include "hab.h"
-#include "khab_test.h"
-#include "hab_pipe.h"
-#ifdef CONFIG_MSM_GVM_QUIN
-#include "hab_qvm.h"
-#endif
+#if !defined CONFIG_GHS_VMM && defined(CONFIG_MSM_GVM_QUIN)
 #include <asm/cacheflush.h>
 #include <linux/list.h>
+#include "hab_pipe.h"
+#include "hab_qvm.h"
+#include "khab_test.h"
 
 static char g_perf_test_result[256];
 
@@ -32,10 +31,8 @@ enum hab_perf_test_type {
 static int hab_shmm_throughput_test(void)
 {
 	struct hab_device *habDev;
-#ifdef CONFIG_MSM_GVM_QUIN
 	struct qvm_channel *dev;
-#endif
-	struct hab_shared_buf *sh_buf = NULL;
+	struct hab_shared_buf *sh_buf;
 	struct physical_channel *pchan;
 	struct timeval tv1, tv2;
 	int i, counter;
@@ -56,7 +53,6 @@ static int hab_shmm_throughput_test(void)
 
 	pchan = list_first_entry(&(habDev->pchannels),
 		struct physical_channel, node);
-#ifdef CONFIG_MSM_GVM_QUIN
 	dev = pchan->hyp_data;
 	if (!dev) {
 		ret = -EPERM;
@@ -64,7 +60,6 @@ static int hab_shmm_throughput_test(void)
 	}
 
 	sh_buf = dev->pipe_ep->tx_info.sh_buf;
-#endif
 
 	/* pChannel is of 128k, we use 64k to test */
 	size = 0x10000;
@@ -268,3 +263,112 @@ static int get_hab_perf_result(char *buffer, struct kernel_param *kp)
 	return strlcpy(buffer, g_perf_test_result,
 		strlen(g_perf_test_result)+1);
 }
+#endif
+
+static struct kobject *hab_kobject;
+
+static int vchan_stat;
+static int context_stat;
+static int pid_stat;
+
+static ssize_t vchan_show(struct kobject *kobj, struct kobj_attribute *attr,
+						char *buf)
+{
+	return hab_stat_show_vchan(&hab_driver, buf, PAGE_SIZE);
+}
+
+static ssize_t vchan_store(struct kobject *kobj, struct kobj_attribute *attr,
+						 char *buf, size_t count)
+{
+	int ret;
+
+	ret = sscanf(buf, "%du", &vchan_stat);
+	if (ret < 1) {
+		pr_err("failed to read anything from input %d", ret);
+		return 0;
+	} else
+		return vchan_stat;
+}
+
+static ssize_t ctx_show(struct kobject *kobj, struct kobj_attribute *attr,
+						char *buf)
+{
+	return hab_stat_show_ctx(&hab_driver, buf, PAGE_SIZE);
+}
+
+static ssize_t ctx_store(struct kobject *kobj, struct kobj_attribute *attr,
+						 char *buf, size_t count)
+{
+	int ret;
+
+	ret = sscanf(buf, "%du", &context_stat);
+	if (ret < 1) {
+		pr_err("failed to read anything from input %d", ret);
+		return 0;
+	} else
+		return context_stat;
+}
+
+static ssize_t expimp_show(struct kobject *kobj, struct kobj_attribute *attr,
+						char *buf)
+{
+	return hab_stat_show_expimp(&hab_driver, pid_stat, buf, PAGE_SIZE);
+}
+
+static ssize_t expimp_store(struct kobject *kobj, struct kobj_attribute *attr,
+						 char *buf, size_t count)
+{
+	int ret;
+
+	ret = sscanf(buf, "%du", &pid_stat);
+	if (ret < 1) {
+		pr_err("failed to read anything from input %d", ret);
+		return 0;
+	} else
+		return pid_stat;
+}
+
+static struct kobj_attribute vchan_attribute = __ATTR(vchan_stat, 0660,
+								vchan_show,
+								vchan_store);
+
+static struct kobj_attribute ctx_attribute = __ATTR(context_stat, 0660,
+								ctx_show,
+								ctx_store);
+
+static struct kobj_attribute expimp_attribute = __ATTR(pid_stat, 0660,
+								expimp_show,
+								expimp_store);
+
+int hab_stat_init_sub(struct hab_driver *driver)
+{
+	int result;
+
+	hab_kobject = kobject_create_and_add("hab", kernel_kobj);
+	if (!hab_kobject)
+		return -ENOMEM;
+
+	result = sysfs_create_file(hab_kobject, &vchan_attribute.attr);
+	if (result)
+		pr_debug("cannot add vchan in /sys/kernel/hab %d\n", result);
+
+	result = sysfs_create_file(hab_kobject, &ctx_attribute.attr);
+	if (result)
+		pr_debug("cannot add ctx in /sys/kernel/hab %d\n", result);
+
+	result = sysfs_create_file(hab_kobject, &expimp_attribute.attr);
+	if (result)
+		pr_debug("cannot add expimp in /sys/kernel/hab %d\n", result);
+
+	return result;
+}
+
+int hab_stat_deinit_sub(struct hab_driver *driver)
+{
+	sysfs_remove_file(hab_kobject, &vchan_attribute.attr);
+	sysfs_remove_file(hab_kobject, &ctx_attribute.attr);
+	sysfs_remove_file(hab_kobject, &expimp_attribute.attr);
+	kobject_put(hab_kobject);
+
+	return 0;
+}

drivers/soc/qcom/hab/qvm_comm.c

@@ -13,7 +13,7 @@
 #include "hab.h"
 #include "hab_qvm.h"
 
-static inline void habhyp_notify(void *commdev)
+inline void habhyp_notify(void *commdev)
 {
 	struct qvm_channel *dev = (struct qvm_channel *)commdev;
 
@@ -70,9 +70,14 @@ int physical_channel_send(struct physical_channel *pchan,
 		struct habmm_xing_vm_stat *pstat =
 			(struct habmm_xing_vm_stat *)payload;
 
-		do_gettimeofday(&tv);
-		pstat->tx_sec = tv.tv_sec;
-		pstat->tx_usec = tv.tv_usec;
+		if (pstat) {
+			do_gettimeofday(&tv);
+			pstat->tx_sec = tv.tv_sec;
+			pstat->tx_usec = tv.tv_usec;
+		} else {
+			spin_unlock_bh(&dev->io_lock);
+			return -EINVAL;
+		}
 	}
 
 	if (sizebytes) {