enum {
PR_TYPE_APR = 0,
+ PR_TYPE_GPR,
};
+/* Some random values tbh which does not collide with static modules */
+#define GPR_DYNAMIC_PORT_START 0x10000000
+#define GPR_DYNAMIC_PORT_END 0x20000000
+
struct packet_router {
struct rpmsg_endpoint *ch;
struct device *dev;
}
EXPORT_SYMBOL_GPL(apr_send_pkt);
+void gpr_free_port(gpr_port_t *port)
+{
+ struct packet_router *gpr = port->pr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gpr->svcs_lock, flags);
+ idr_remove(&gpr->svcs_idr, port->id);
+ spin_unlock_irqrestore(&gpr->svcs_lock, flags);
+
+ kfree(port);
+}
+EXPORT_SYMBOL_GPL(gpr_free_port);
+
+gpr_port_t *gpr_alloc_port(struct apr_device *gdev, struct device *dev,
+ gpr_port_cb cb, void *priv)
+{
+ struct packet_router *pr = dev_get_drvdata(gdev->dev.parent);
+ gpr_port_t *port;
+ struct pkt_router_svc *svc;
+ int id;
+
+ port = kzalloc(sizeof(*port), GFP_KERNEL);
+ if (!port)
+ return ERR_PTR(-ENOMEM);
+
+ svc = port;
+ svc->callback = cb;
+ svc->pr = pr;
+ svc->priv = priv;
+ svc->dev = dev;
+ spin_lock_init(&svc->lock);
+
+ spin_lock(&pr->svcs_lock);
+ id = idr_alloc_cyclic(&pr->svcs_idr, svc, GPR_DYNAMIC_PORT_START,
+ GPR_DYNAMIC_PORT_END, GFP_ATOMIC);
+ if (id < 0) {
+ dev_err(dev, "Unable to allocate dynamic GPR src port\n");
+ kfree(port);
+ spin_unlock(&pr->svcs_lock);
+ return ERR_PTR(id);
+ }
+
+ svc->id = id;
+ spin_unlock(&pr->svcs_lock);
+
+ return port;
+}
+EXPORT_SYMBOL_GPL(gpr_alloc_port);
+
+static int pkt_router_send_svc_pkt(struct pkt_router_svc *svc, struct gpr_pkt *pkt)
+{
+ struct packet_router *pr = svc->pr;
+ struct gpr_hdr *hdr;
+ unsigned long flags;
+ int ret;
+
+ hdr = &pkt->hdr;
+
+ spin_lock_irqsave(&svc->lock, flags);
+ ret = rpmsg_trysend(pr->ch, pkt, hdr->pkt_size);
+ spin_unlock_irqrestore(&svc->lock, flags);
+
+ return ret ? ret : hdr->pkt_size;
+}
+
+int gpr_send_pkt(struct apr_device *gdev, struct gpr_pkt *pkt)
+{
+ return pkt_router_send_svc_pkt(&gdev->svc, pkt);
+}
+EXPORT_SYMBOL_GPL(gpr_send_pkt);
+
+int gpr_send_port_pkt(gpr_port_t *port, struct gpr_pkt *pkt)
+{
+ return pkt_router_send_svc_pkt(port, pkt);
+}
+EXPORT_SYMBOL_GPL(gpr_send_port_pkt);
+
static void apr_dev_release(struct device *dev)
{
struct apr_device *adev = to_apr_device(dev);
return 0;
}
+static int gpr_do_rx_callback(struct packet_router *gpr, struct apr_rx_buf *abuf)
+{
+ uint16_t hdr_size, ver;
+ struct pkt_router_svc *svc = NULL;
+ struct gpr_resp_pkt resp;
+ struct gpr_hdr *hdr;
+ unsigned long flags;
+ void *buf = abuf->buf;
+ int len = abuf->len;
+
+ hdr = buf;
+ ver = hdr->version;
+ if (ver > GPR_PKT_VER + 1)
+ return -EINVAL;
+
+ hdr_size = hdr->hdr_size;
+ if (hdr_size < GPR_PKT_HEADER_WORD_SIZE) {
+ dev_err(gpr->dev, "GPR: Wrong hdr size:%d\n", hdr_size);
+ return -EINVAL;
+ }
+
+ if (hdr->pkt_size < GPR_PKT_HEADER_BYTE_SIZE || hdr->pkt_size != len) {
+ dev_err(gpr->dev, "GPR: Wrong packet size\n");
+ return -EINVAL;
+ }
+
+ resp.hdr = *hdr;
+ resp.payload_size = hdr->pkt_size - (hdr_size * 4);
+
+ /*
+ * NOTE: hdr_size is not same as GPR_HDR_SIZE as remote can include
+ * optional headers in to gpr_hdr which should be ignored
+ */
+ if (resp.payload_size > 0)
+ resp.payload = buf + (hdr_size * 4);
+
+
+ spin_lock_irqsave(&gpr->svcs_lock, flags);
+ svc = idr_find(&gpr->svcs_idr, hdr->dest_port);
+ spin_unlock_irqrestore(&gpr->svcs_lock, flags);
+
+ if (!svc) {
+ dev_err(gpr->dev, "GPR: Port(%x) is not registered\n",
+ hdr->dest_port);
+ return -EINVAL;
+ }
+
+ if (svc->callback)
+ svc->callback(&resp, svc->priv, 0);
+
+ return 0;
+}
+
static void apr_rxwq(struct work_struct *work)
{
struct packet_router *apr = container_of(work, struct packet_router, rx_work);
case PR_TYPE_APR:
apr_do_rx_callback(apr, abuf);
break;
+ case PR_TYPE_GPR:
+ gpr_do_rx_callback(apr, abuf);
+ break;
default:
break;
}
{
struct apr_device *adev = to_apr_device(dev);
struct apr_driver *adrv = to_apr_driver(dev->driver);
+ int ret;
- return adrv->probe(adev);
+ ret = adrv->probe(adev);
+ if (!ret)
+ adev->svc.callback = adrv->gpr_callback;
+
+ return ret;
}
static void apr_device_remove(struct device *dev)
dev_set_name(&adev->dev, "aprsvc:%s:%x:%x", adev->name,
domain_id, svc_id);
break;
+ case PR_TYPE_GPR:
+ dev_set_name(&adev->dev, "gprsvc:%s:%x:%x", adev->name,
+ domain_id, svc_id);
+ break;
default:
break;
}
of_property_read_string_index(np, "qcom,protection-domain",
1, &adev->service_path);
- dev_info(dev, "Adding APR dev: %s\n", dev_name(&adev->dev));
+ dev_info(dev, "Adding APR/GPR dev: %s\n", dev_name(&adev->dev));
ret = device_register(&adev->dev);
if (ret) {
return -ENOMEM;
ret = of_property_read_u32(dev->of_node, "qcom,domain", &apr->dest_domain_id);
- if (ret) /* try deprecated apr-domain property */
- ret = of_property_read_u32(dev->of_node, "qcom,apr-domain",
- &apr->dest_domain_id);
- apr->type = PR_TYPE_APR;
+
+ if (of_device_is_compatible(dev->of_node, "qcom,gpr")) {
+ apr->type = PR_TYPE_GPR;
+ } else {
+ if (ret) /* try deprecated apr-domain property */
+ ret = of_property_read_u32(dev->of_node, "qcom,apr-domain",
+ &apr->dest_domain_id);
+ apr->type = PR_TYPE_APR;
+ }
+
if (ret) {
dev_err(dev, "Domain ID not specified in DT\n");
return ret;
static const struct of_device_id pkt_router_of_match[] = {
{ .compatible = "qcom,apr"},
{ .compatible = "qcom,apr-v2"},
+ { .compatible = "qcom,gpr"},
{}
};
MODULE_DEVICE_TABLE(of, pkt_router_of_match);
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <dt-bindings/soc/qcom,apr.h>
+#include <dt-bindings/soc/qcom,gpr.h>
extern struct bus_type aprbus;
int payload_size;
};
+struct gpr_hdr {
+ uint32_t version:4;
+ uint32_t hdr_size:4;
+ uint32_t pkt_size:24;
+ uint32_t dest_domain:8;
+ uint32_t src_domain:8;
+ uint32_t reserved:16;
+ uint32_t src_port;
+ uint32_t dest_port;
+ uint32_t token;
+ uint32_t opcode;
+} __packed;
+
+struct gpr_pkt {
+ struct gpr_hdr hdr;
+ uint32_t payload[];
+};
+
+struct gpr_resp_pkt {
+ struct gpr_hdr hdr;
+ void *payload;
+ int payload_size;
+};
+
+#define GPR_HDR_SIZE sizeof(struct gpr_hdr)
+#define GPR_PKT_VER 0x0
+#define GPR_PKT_HEADER_WORD_SIZE ((sizeof(struct gpr_pkt) + 3) >> 2)
+#define GPR_PKT_HEADER_BYTE_SIZE (GPR_PKT_HEADER_WORD_SIZE << 2)
+
+#define GPR_BASIC_RSP_RESULT 0x02001005
+
+struct gpr_ibasic_rsp_result_t {
+ uint32_t opcode;
+ uint32_t status;
+};
+
+#define GPR_BASIC_EVT_ACCEPTED 0x02001006
+
+struct gpr_ibasic_rsp_accepted_t {
+ uint32_t opcode;
+};
+
/* Bits 0 to 15 -- Minor version, Bits 16 to 31 -- Major version */
#define APR_SVC_MAJOR_VERSION(v) ((v >> 16) & 0xFF)
#define APR_SVC_MINOR_VERSION(v) (v & 0xFF)
+typedef int (*gpr_port_cb) (struct gpr_resp_pkt *d, void *priv, int op);
struct packet_router;
struct pkt_router_svc {
struct device *dev;
+ gpr_port_cb callback;
struct packet_router *pr;
spinlock_t lock;
int id;
void *priv;
};
+typedef struct pkt_router_svc gpr_port_t;
+
struct apr_device {
struct device dev;
uint16_t svc_id;
struct list_head node;
};
+typedef struct apr_device gpr_device_t;
+
#define to_apr_device(d) container_of(d, struct apr_device, dev)
#define svc_to_apr_device(d) container_of(d, struct apr_device, svc)
int (*remove)(struct apr_device *sl);
int (*callback)(struct apr_device *a,
struct apr_resp_pkt *d);
+ int (*gpr_callback)(struct gpr_resp_pkt *d, void *data, int op);
struct device_driver driver;
const struct apr_device_id *id_table;
};
+typedef struct apr_driver gpr_driver_t;
#define to_apr_driver(d) container_of(d, struct apr_driver, driver)
/*
#define module_apr_driver(__apr_driver) \
module_driver(__apr_driver, apr_driver_register, \
apr_driver_unregister)
+#define module_gpr_driver(__gpr_driver) module_apr_driver(__gpr_driver)
int apr_send_pkt(struct apr_device *adev, struct apr_pkt *pkt);
+gpr_port_t *gpr_alloc_port(gpr_device_t *gdev, struct device *dev,
+ gpr_port_cb cb, void *priv);
+void gpr_free_port(gpr_port_t *port);
+int gpr_send_port_pkt(gpr_port_t *port, struct gpr_pkt *pkt);
+int gpr_send_pkt(gpr_device_t *gdev, struct gpr_pkt *pkt);
+
#endif /* __QCOM_APR_H_ */
projects / users / hch / xfs.git / commitdiff