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soc: qcom: hgsl: decouple ifence and doorbell

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In systems doorbell is not valid, could set db-off flag to 1. Then
the driver still could probe and disable doorbell and hfence commands.
ifence still works.

Change-Id: I6d4e171d64dfc183f5d500fbd1180adb4b108a63
Signed-off-by: Kasin Li <donglil@codeaurora.org>
This commit is contained in:
Kasin Li 2021-03-05 23:16:50 +08:00 • committed by Gerrit - the friendly Code Review server
commit 2bf9abc13c
1 changed files with 72 additions and 8 deletions
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80
drivers/soc/qcom/hgsl/hgsl.c
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@ -289,6 +289,9 @@ struct qcom_hgsl {
struct doorbell_queue dbq[MAX_DB_QUEUE];
/* Could disable db and use isync only */
bool db_off;
/* global doorbell tcsr */
struct hgsl_tcsr *tcsr[HGSL_TCSR_NUM][HGSL_TCSR_ROLE_MAX];
int tcsr_idx;
@ -550,6 +553,11 @@ static int hgsl_cmdstream_db_issueib(struct file *filep,
int idx;
int ret = 0;
if (hgsl->db_off) {
dev_err(hgsl->dev, "Doorbell not open\n");
return -EPERM;
}
copy_from_user(&submit_info, USRPTR(arg), sizeof(submit_info));
if (!hgsl_ctx_dbq_ready(priv)) {
@ -665,6 +673,11 @@ static int hgsl_dbq_assign(struct file *filep, unsigned long arg)
struct doorbell_queue *dbq;
unsigned int dbq_idx;
if (hgsl->db_off) {
dev_err(hgsl->dev, "Doorbell not open\n");
return -EPERM;
}
if (copy_from_user(&dbq_idx, USRPTR(arg), sizeof(dbq_idx)))
return -EFAULT;
@ -875,6 +888,11 @@ static int hgsl_dbq_init(struct file *filep, unsigned long arg)
int tcsr_idx;
int ret;
if (hgsl->db_off) {
dev_err(hgsl->dev, "Doorbell not open\n");
return -EPERM;
}
copy_from_user(&param, USRPTR(arg), sizeof(param));
if (param.fd < 0) {
dev_err(hgsl->dev, "Invalid dbq fd\n");
@ -969,6 +987,11 @@ static int hgsl_context_create(struct file *filep, unsigned long arg)
struct hgsl_context *ctxt;
int ret = 0;
if (hgsl->db_off) {
dev_err(hgsl->dev, "Doorbell not open\n");
return -EPERM;
}
if (!hgsl->contexts) {
dev_err(hgsl->dev, "DBQ not initialized propertily\n");
return -ENODEV;
@ -1068,6 +1091,11 @@ static int hgsl_context_destroy(struct file *filep, unsigned long arg,
uint32_t context_id;
struct hgsl_context *ctxt;
if (hgsl->db_off) {
dev_err(hgsl->dev, "Doorbell not open\n");
return -EPERM;
}
if (!is_global_db(hgsl->tcsr_idx)) {
dev_err(hgsl->dev, "Global doorbell not supported for this process\n");
return -ENODEV;
@ -1120,6 +1148,11 @@ static int hgsl_wait_timestamp(struct file *filep, unsigned long arg)
unsigned int timestamp;
int ret;
if (hgsl->db_off) {
dev_err(hgsl->dev, "Doorbell not open\n");
return -EPERM;
}
if (!is_global_db(hgsl->tcsr_idx)) {
dev_err(hgsl->dev, "Global doorbell not supported for this process\n");
return -ENODEV;
@ -1193,6 +1226,11 @@ static int hgsl_dbq_release(struct file *filep, unsigned long arg,
struct hgsl_dbq_release_info rel_info;
int ret = 0;
if (hgsl->db_off) {
dev_err(hgsl->dev, "Doorbell not open\n");
return -EPERM;
}
if (!force_cleanup)
ret = copy_from_user(&rel_info, USRPTR(arg),
sizeof(rel_info));
@ -1272,10 +1310,13 @@ static ssize_t hgsl_read(struct file *filep, char __user *buf, size_t count,
uint32_t release = 0;
char buff[100];
hgsl_reg_read(&hgsl->reg_ver, 0, &version);
hgsl_reg_read(&hgsl->reg_ver, 4, &release);
snprintf(buff, 100, "gpu HW Version:%x HW Release:%x\n",
if (!hgsl->db_off) {
hgsl_reg_read(&hgsl->reg_ver, 0, &version);
hgsl_reg_read(&hgsl->reg_ver, 4, &release);
snprintf(buff, 100, "gpu HW Version:%x HW Release:%x\n",
version, release);
} else
snprintf(buff, 100, "Doorbell closed\n");
return simple_read_from_buffer(buf, count, pos,
buff, strlen(buff) + 1);
@ -1290,6 +1331,11 @@ static int hgsl_ioctl_hsync_fence_create(struct file *filep,
struct hgsl_context *ctxt;
int ret = 0;
if (hgsl->db_off) {
dev_err(hgsl->dev, "Doorbell not open\n");
return -EPERM;
}
copy_from_user(&param, USRPTR(arg), sizeof(param));
read_lock(&hgsl->ctxt_lock);
@ -1529,6 +1575,18 @@ static void qcom_hgsl_deregister(struct platform_device *pdev)
unregister_chrdev_region(hgsl_dev->device_no, HGSL_DEV_NUM);
}
static bool hgsl_is_db_off(struct platform_device *pdev)
{
uint32_t db_off = 0;
if (pdev == NULL)
return true;
of_property_read_u32(pdev->dev.of_node, "db-off", &db_off);
return db_off == 1 ? true : false;
}
static int hgsl_reg_map(struct platform_device *pdev,
char *res_name, struct reg *reg)
{
@ -1600,13 +1658,19 @@ static int qcom_hgsl_probe(struct platform_device *pdev)
return ret;
}
ret = hgsl_reg_map(pdev, IORESOURCE_HWINF, &hgsl_dev->reg_ver);
if (ret < 0) {
dev_err(&pdev->dev, "Unable to map resource:%s\n",
IORESOURCE_HWINF);
goto exit_dereg;
hgsl_dev->db_off = hgsl_is_db_off(pdev);
if (!hgsl_dev->db_off) {
ret = hgsl_reg_map(pdev, IORESOURCE_HWINF,
&hgsl_dev->reg_ver);
if (ret < 0) {
dev_err(&pdev->dev, "Unable to map resource:%s\n",
IORESOURCE_HWINF);
goto exit_dereg;
}
}
for (i = 0; i < MAX_DB_QUEUE; i++) {
mutex_init(&hgsl_dev->dbq[i].lock);
hgsl_dev->dbq[i].state = DB_STATE_Q_UNINIT;