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authorfarah kassabri <fkassabri@habana.ai>2022-11-16 16:40:30 +0300
committerOded Gabbay <ogabbay@kernel.org>2023-01-26 11:56:22 +0300
commitc2239a251d2d738f435c46bae7d66899c62ce493 (patch)
tree6fae149dd390cffa35067eb4bf04fb22086d2c42 /drivers/misc
parent2dd89591d8c7fe7b24daeac0faf8a0afa30f9b0b (diff)
downloadlinux-c2239a251d2d738f435c46bae7d66899c62ce493.tar.xz
habanalabs: pass-through request from user to f/w
Add a uAPI, as part of the INFO IOCTL, to allow users to send requests directly to f/w, according to a pre-defined set of opcodes that the f/w exposes. The f/w will put the result in a kernel-allocated buffer, which the driver will then copy to the user-supplied buffer. This will allow f/w tools to communicate directly with the f/w without the need to add a new uAPI to the driver for each new type of request. Signed-off-by: farah kassabri <fkassabri@habana.ai> Reviewed-by: Oded Gabbay <ogabbay@kernel.org> Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/habanalabs/common/firmware_if.c24
-rw-r--r--drivers/misc/habanalabs/common/habanalabs.h2
-rw-r--r--drivers/misc/habanalabs/common/habanalabs_ioctl.c51
-rw-r--r--drivers/misc/habanalabs/include/common/cpucp_if.h65
4 files changed, 135 insertions, 7 deletions
diff --git a/drivers/misc/habanalabs/common/firmware_if.c b/drivers/misc/habanalabs/common/firmware_if.c
index a8911e15d937..eb000e035026 100644
--- a/drivers/misc/habanalabs/common/firmware_if.c
+++ b/drivers/misc/habanalabs/common/firmware_if.c
@@ -3145,3 +3145,27 @@ int hl_fw_get_sec_attest_info(struct hl_device *hdev, struct cpucp_sec_attest_in
sizeof(struct cpucp_sec_attest_info), nonce,
HL_CPUCP_SEC_ATTEST_INFO_TINEOUT_USEC);
}
+
+int hl_fw_send_generic_request(struct hl_device *hdev, enum hl_passthrough_type sub_opcode,
+ dma_addr_t buff, u32 *size)
+{
+ struct cpucp_packet pkt = {0};
+ u64 result;
+ int rc = 0;
+
+ pkt.ctl = cpu_to_le32(CPUCP_PACKET_GENERIC_PASSTHROUGH << CPUCP_PKT_CTL_OPCODE_SHIFT);
+ pkt.addr = cpu_to_le64(buff);
+ pkt.data_max_size = cpu_to_le32(*size);
+ pkt.pkt_subidx = cpu_to_le32(sub_opcode);
+
+ rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *)&pkt, sizeof(pkt),
+ HL_CPUCP_INFO_TIMEOUT_USEC, &result);
+ if (rc)
+ dev_err(hdev->dev, "failed to send CPUCP data of generic fw pkt\n");
+ else
+ dev_dbg(hdev->dev, "generic pkt was successful, result: 0x%llx\n", result);
+
+ *size = (u32)result;
+
+ return rc;
+}
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 210dd607e18b..c609b2e44ad3 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -3790,6 +3790,8 @@ int hl_fw_get_clk_rate(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk);
void hl_fw_set_pll_profile(struct hl_device *hdev);
void hl_sysfs_add_dev_clk_attr(struct hl_device *hdev, struct attribute_group *dev_clk_attr_grp);
void hl_sysfs_add_dev_vrm_attr(struct hl_device *hdev, struct attribute_group *dev_vrm_attr_grp);
+int hl_fw_send_generic_request(struct hl_device *hdev, enum hl_passthrough_type sub_opcode,
+ dma_addr_t buff, u32 *size);
void hw_sob_get(struct hl_hw_sob *hw_sob);
void hw_sob_put(struct hl_hw_sob *hw_sob);
diff --git a/drivers/misc/habanalabs/common/habanalabs_ioctl.c b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
index b6abfa7761a7..4d642987ad02 100644
--- a/drivers/misc/habanalabs/common/habanalabs_ioctl.c
+++ b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
@@ -820,6 +820,54 @@ static int user_mappings_info(struct hl_fpriv *hpriv, struct hl_info_args *args)
? -EFAULT : 0;
}
+static int send_fw_generic_request(struct hl_device *hdev, struct hl_info_args *info_args)
+{
+ void __user *buff = (void __user *) (uintptr_t) info_args->return_pointer;
+ u32 size = info_args->return_size;
+ dma_addr_t dma_handle;
+ bool need_input_buff;
+ void *fw_buff;
+ int rc = 0;
+
+ switch (info_args->fw_sub_opcode) {
+ case HL_PASSTHROUGH_VERSIONS:
+ need_input_buff = false;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (size > SZ_1M) {
+ dev_err(hdev->dev, "buffer size cannot exceed 1MB\n");
+ return -EINVAL;
+ }
+
+ fw_buff = hl_cpu_accessible_dma_pool_alloc(hdev, size, &dma_handle);
+ if (!fw_buff)
+ return -ENOMEM;
+
+
+ if (need_input_buff && copy_from_user(fw_buff, buff, size)) {
+ dev_dbg(hdev->dev, "Failed to copy from user FW buff\n");
+ rc = -EFAULT;
+ goto free_buff;
+ }
+
+ rc = hl_fw_send_generic_request(hdev, info_args->fw_sub_opcode, dma_handle, &size);
+ if (rc)
+ goto free_buff;
+
+ if (copy_to_user(buff, fw_buff, min(size, info_args->return_size))) {
+ dev_dbg(hdev->dev, "Failed to copy to user FW generic req output\n");
+ rc = -EFAULT;
+ }
+
+free_buff:
+ hl_cpu_accessible_dma_pool_free(hdev, info_args->return_size, fw_buff);
+
+ return rc;
+}
+
static int _hl_info_ioctl(struct hl_fpriv *hpriv, void *data,
struct device *dev)
{
@@ -947,6 +995,9 @@ static int _hl_info_ioctl(struct hl_fpriv *hpriv, void *data,
case HL_INFO_ENGINE_STATUS:
return engine_status_info(hpriv, args);
+ case HL_INFO_FW_GENERIC_REQ:
+ return send_fw_generic_request(hdev, args);
+
default:
dev_err(dev, "Invalid request %d\n", args->op);
rc = -EINVAL;
diff --git a/drivers/misc/habanalabs/include/common/cpucp_if.h b/drivers/misc/habanalabs/include/common/cpucp_if.h
index baa5aa43b6f4..0a66b7f85164 100644
--- a/drivers/misc/habanalabs/include/common/cpucp_if.h
+++ b/drivers/misc/habanalabs/include/common/cpucp_if.h
@@ -643,6 +643,10 @@ enum pq_init_status {
* data corruption in case of mismatched driver/FW versions.
* Relevant only to Gaudi.
*
+ * * CPUCP_PACKET_GENERIC_PASSTHROUGH -
+ * Generic opcode for all firmware info that is only passed to host
+ * through the LKD, without getting parsed there.
+ *
* CPUCP_PACKET_ACTIVE_STATUS_SET -
* LKD sends FW indication whether device is free or in use, this indication is reported
* also to the BMC.
@@ -704,9 +708,12 @@ enum cpucp_packet_id {
CPUCP_PACKET_RESERVED5, /* not used */
CPUCP_PACKET_RESERVED6, /* not used */
CPUCP_PACKET_RESERVED7, /* not used */
+ CPUCP_PACKET_GENERIC_PASSTHROUGH, /* IOCTL */
CPUCP_PACKET_RESERVED8, /* not used */
- CPUCP_PACKET_RESERVED9, /* not used */
CPUCP_PACKET_ACTIVE_STATUS_SET, /* internal */
+ CPUCP_PACKET_RESERVED9, /* not used */
+ CPUCP_PACKET_RESERVED10, /* not used */
+ CPUCP_PACKET_RESERVED11, /* not used */
CPUCP_PACKET_ID_MAX /* must be last */
};
@@ -805,8 +812,13 @@ struct cpucp_packet {
__le32 nonce;
};
- /* For NIC requests */
- __le32 port_index;
+ union {
+ /* For NIC requests */
+ __le32 port_index;
+
+ /* For Generic packet sub index */
+ __le32 pkt_subidx;
+ };
};
struct cpucp_unmask_irq_arr_packet {
@@ -976,6 +988,11 @@ enum pll_index {
IC_PLL = 16,
MC_PLL = 17,
EMMC_PLL = 18,
+ D2D_PLL = 19,
+ CS_PLL = 20,
+ C2C_PLL = 21,
+ NCH_PLL = 22,
+ C2M_PLL = 23,
PLL_MAX
};
@@ -1135,8 +1152,9 @@ enum cpucp_serdes_type {
HLS1_SERDES_TYPE,
HLS1H_SERDES_TYPE,
HLS2_SERDES_TYPE,
- UNKNOWN_SERDES_TYPE,
- MAX_NUM_SERDES_TYPE = UNKNOWN_SERDES_TYPE
+ HLS2_TYPE_1_SERDES_TYPE,
+ MAX_NUM_SERDES_TYPE, /* number of types */
+ UNKNOWN_SERDES_TYPE = 0xFFFF /* serdes_type is u16 */
};
struct cpucp_nic_info {
@@ -1161,6 +1179,21 @@ struct page_discard_info {
};
/*
+ * struct frac_val - fracture value represented by "integer.frac".
+ * @integer: the integer part of the fracture value;
+ * @frac: the fracture part of the fracture value.
+ */
+struct frac_val {
+ union {
+ struct {
+ __le16 integer;
+ __le16 frac;
+ };
+ __le32 val;
+ };
+};
+
+/*
* struct ser_val - the SER (symbol error rate) value is represented by "integer * 10 ^ -exp".
* @integer: the integer part of the SER value;
* @exp: the exponent part of the SER value.
@@ -1183,8 +1216,12 @@ struct ser_val {
* @pcs_link: has PCS link.
* @phy_ready: is PHY ready.
* @auto_neg: is Autoneg enabled.
- * @timeout_retransmission_cnt: timeout retransmission events
- * @high_ber_cnt: high ber events
+ * @timeout_retransmission_cnt: timeout retransmission events.
+ * @high_ber_cnt: high ber events.
+ * @pre_fec_ser: pre FEC SER value.
+ * @post_fec_ser: post FEC SER value.
+ * @throughput: measured throughput.
+ * @latency: measured latency.
*/
struct cpucp_nic_status {
__le32 port;
@@ -1200,6 +1237,10 @@ struct cpucp_nic_status {
__u8 auto_neg;
__le32 timeout_retransmission_cnt;
__le32 high_ber_cnt;
+ struct ser_val pre_fec_ser;
+ struct ser_val post_fec_ser;
+ struct frac_val bandwidth;
+ struct frac_val lat;
};
enum cpucp_hbm_row_replace_cause {
@@ -1317,4 +1358,14 @@ struct cpucp_monitor_dump {
struct dcore_monitor_regs_data sync_mngr_e_n;
};
+/*
+ * The Type of the generic request (and other input arguments) will be fetched from user by reading
+ * from "pkt_subidx" field in struct cpucp_packet.
+ *
+ * HL_PASSTHROUGHT_VERSIONS - Fetch all firmware versions.
+ */
+enum hl_passthrough_type {
+ HL_PASSTHROUGH_VERSIONS,
+};
+
#endif /* CPUCP_IF_H */