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path: root/drivers/thunderbolt/usb4.c
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Diffstat (limited to 'drivers/thunderbolt/usb4.c')
-rw-r--r--drivers/thunderbolt/usb4.c295
1 files changed, 167 insertions, 128 deletions
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c
index 78b06e922fda..fdae76c8f728 100644
--- a/drivers/thunderbolt/usb4.c
+++ b/drivers/thunderbolt/usb4.c
@@ -17,12 +17,6 @@
#define USB4_DATA_RETRIES 3
#define USB4_DATA_DWORDS 16
-enum usb4_sb_target {
- USB4_SB_TARGET_ROUTER,
- USB4_SB_TARGET_PARTNER,
- USB4_SB_TARGET_RETIMER,
-};
-
#define USB4_NVM_READ_OFFSET_MASK GENMASK(23, 2)
#define USB4_NVM_READ_OFFSET_SHIFT 2
#define USB4_NVM_READ_LENGTH_MASK GENMASK(27, 24)
@@ -52,6 +46,10 @@ enum usb4_ba_index {
#define USB4_BA_VALUE_MASK GENMASK(31, 16)
#define USB4_BA_VALUE_SHIFT 16
+/* Delays in us used with usb4_port_wait_for_bit() */
+#define USB4_PORT_DELAY 50
+#define USB4_PORT_SB_DELAY 1000
+
static int usb4_native_switch_op(struct tb_switch *sw, u16 opcode,
u32 *metadata, u8 *status,
const void *tx_data, size_t tx_dwords,
@@ -405,12 +403,12 @@ bool usb4_switch_lane_bonding_possible(struct tb_switch *sw)
* usb4_switch_set_wake() - Enabled/disable wake
* @sw: USB4 router
* @flags: Wakeup flags (%0 to disable)
+ * @runtime: Wake is being programmed during system runtime
*
* Enables/disables router to wake up from sleep.
*/
-int usb4_switch_set_wake(struct tb_switch *sw, unsigned int flags)
+int usb4_switch_set_wake(struct tb_switch *sw, unsigned int flags, bool runtime)
{
- struct usb4_port *usb4;
struct tb_port *port;
u64 route = tb_route(sw);
u32 val;
@@ -440,13 +438,11 @@ int usb4_switch_set_wake(struct tb_switch *sw, unsigned int flags)
val |= PORT_CS_19_WOU4;
} else {
bool configured = val & PORT_CS_19_PC;
- usb4 = port->usb4;
+ bool wakeup = runtime || device_may_wakeup(&port->usb4->dev);
- if (((flags & TB_WAKE_ON_CONNECT) |
- device_may_wakeup(&usb4->dev)) && !configured)
+ if ((flags & TB_WAKE_ON_CONNECT) && wakeup && !configured)
val |= PORT_CS_19_WOC;
- if (((flags & TB_WAKE_ON_DISCONNECT) |
- device_may_wakeup(&usb4->dev)) && configured)
+ if ((flags & TB_WAKE_ON_DISCONNECT) && wakeup && configured)
val |= PORT_CS_19_WOD;
if ((flags & TB_WAKE_ON_USB4) && configured)
val |= PORT_CS_19_WOU4;
@@ -937,7 +933,15 @@ int usb4_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
return status ? -EIO : 0;
}
-static int usb4_port_idx(const struct tb_switch *sw, const struct tb_port *port)
+/**
+ * usb4_port_index() - Finds matching USB4 port index
+ * @sw: USB4 router
+ * @port: USB4 protocol or lane adapter
+ *
+ * Finds matching USB4 port index (starting from %0) that given @port goes
+ * through.
+ */
+int usb4_port_index(const struct tb_switch *sw, const struct tb_port *port)
{
struct tb_port *p;
int usb4_idx = 0;
@@ -971,7 +975,7 @@ static int usb4_port_idx(const struct tb_switch *sw, const struct tb_port *port)
struct tb_port *usb4_switch_map_pcie_down(struct tb_switch *sw,
const struct tb_port *port)
{
- int usb4_idx = usb4_port_idx(sw, port);
+ int usb4_idx = usb4_port_index(sw, port);
struct tb_port *p;
int pcie_idx = 0;
@@ -1002,7 +1006,7 @@ struct tb_port *usb4_switch_map_pcie_down(struct tb_switch *sw,
struct tb_port *usb4_switch_map_usb3_down(struct tb_switch *sw,
const struct tb_port *port)
{
- int usb4_idx = usb4_port_idx(sw, port);
+ int usb4_idx = usb4_port_index(sw, port);
struct tb_port *p;
int usb_idx = 0;
@@ -1245,7 +1249,7 @@ void usb4_port_unconfigure_xdomain(struct tb_port *port)
}
static int usb4_port_wait_for_bit(struct tb_port *port, u32 offset, u32 bit,
- u32 value, int timeout_msec)
+ u32 value, int timeout_msec, unsigned long delay_usec)
{
ktime_t timeout = ktime_add_ms(ktime_get(), timeout_msec);
@@ -1260,7 +1264,7 @@ static int usb4_port_wait_for_bit(struct tb_port *port, u32 offset, u32 bit,
if ((val & bit) == value)
return 0;
- usleep_range(50, 100);
+ fsleep(delay_usec);
} while (ktime_before(ktime_get(), timeout));
return -ETIMEDOUT;
@@ -1285,8 +1289,20 @@ static int usb4_port_write_data(struct tb_port *port, const void *data,
dwords);
}
-static int usb4_port_sb_read(struct tb_port *port, enum usb4_sb_target target,
- u8 index, u8 reg, void *buf, u8 size)
+/**
+ * usb4_port_sb_read() - Read from sideband register
+ * @port: USB4 port to read
+ * @target: Sideband target
+ * @index: Retimer index if taget is %USB4_SB_TARGET_RETIMER
+ * @reg: Sideband register index
+ * @buf: Buffer where the sideband data is copied
+ * @size: Size of @buf
+ *
+ * Reads data from sideband register @reg and copies it into @buf.
+ * Returns %0 in case of success and negative errno in case of failure.
+ */
+int usb4_port_sb_read(struct tb_port *port, enum usb4_sb_target target, u8 index,
+ u8 reg, void *buf, u8 size)
{
size_t dwords = DIV_ROUND_UP(size, 4);
int ret;
@@ -1308,7 +1324,7 @@ static int usb4_port_sb_read(struct tb_port *port, enum usb4_sb_target target,
return ret;
ret = usb4_port_wait_for_bit(port, port->cap_usb4 + PORT_CS_1,
- PORT_CS_1_PND, 0, 500);
+ PORT_CS_1_PND, 0, 500, USB4_PORT_SB_DELAY);
if (ret)
return ret;
@@ -1325,8 +1341,20 @@ static int usb4_port_sb_read(struct tb_port *port, enum usb4_sb_target target,
return buf ? usb4_port_read_data(port, buf, dwords) : 0;
}
-static int usb4_port_sb_write(struct tb_port *port, enum usb4_sb_target target,
- u8 index, u8 reg, const void *buf, u8 size)
+/**
+ * usb4_port_sb_write() - Write to sideband register
+ * @port: USB4 port to write
+ * @target: Sideband target
+ * @index: Retimer index if taget is %USB4_SB_TARGET_RETIMER
+ * @reg: Sideband register index
+ * @buf: Data to write
+ * @size: Size of @buf
+ *
+ * Writes @buf to sideband register @reg. Returns %0 in case of success
+ * and negative errno in case of failure.
+ */
+int usb4_port_sb_write(struct tb_port *port, enum usb4_sb_target target,
+ u8 index, u8 reg, const void *buf, u8 size)
{
size_t dwords = DIV_ROUND_UP(size, 4);
int ret;
@@ -1355,7 +1383,7 @@ static int usb4_port_sb_write(struct tb_port *port, enum usb4_sb_target target,
return ret;
ret = usb4_port_wait_for_bit(port, port->cap_usb4 + PORT_CS_1,
- PORT_CS_1_PND, 0, 500);
+ PORT_CS_1_PND, 0, 500, USB4_PORT_SB_DELAY);
if (ret)
return ret;
@@ -1410,6 +1438,8 @@ static int usb4_port_sb_op(struct tb_port *port, enum usb4_sb_target target,
if (val != opcode)
return usb4_port_sb_opcode_err_to_errno(val);
+
+ fsleep(USB4_PORT_SB_DELAY);
} while (ktime_before(ktime_get(), timeout));
return -ETIMEDOUT;
@@ -1591,133 +1621,157 @@ int usb4_port_asym_start(struct tb_port *port)
* port started the symmetry transition.
*/
ret = usb4_port_wait_for_bit(port, port->cap_usb4 + PORT_CS_19,
- PORT_CS_19_START_ASYM, 0, 1000);
+ PORT_CS_19_START_ASYM, 0, 1000,
+ USB4_PORT_DELAY);
if (ret)
return ret;
/* Then wait for the transtion to be completed */
return usb4_port_wait_for_bit(port, port->cap_usb4 + PORT_CS_18,
- PORT_CS_18_TIP, 0, 5000);
+ PORT_CS_18_TIP, 0, 5000, USB4_PORT_DELAY);
}
/**
* usb4_port_margining_caps() - Read USB4 port marginig capabilities
* @port: USB4 port
+ * @target: Sideband target
+ * @index: Retimer index if taget is %USB4_SB_TARGET_RETIMER
* @caps: Array with at least two elements to hold the results
+ * @ncaps: Number of elements in the caps array
*
* Reads the USB4 port lane margining capabilities into @caps.
*/
-int usb4_port_margining_caps(struct tb_port *port, u32 *caps)
+int usb4_port_margining_caps(struct tb_port *port, enum usb4_sb_target target,
+ u8 index, u32 *caps, size_t ncaps)
{
int ret;
- ret = usb4_port_sb_op(port, USB4_SB_TARGET_ROUTER, 0,
+ ret = usb4_port_sb_op(port, target, index,
USB4_SB_OPCODE_READ_LANE_MARGINING_CAP, 500);
if (ret)
return ret;
- return usb4_port_sb_read(port, USB4_SB_TARGET_ROUTER, 0,
- USB4_SB_DATA, caps, sizeof(*caps) * 2);
+ return usb4_port_sb_read(port, target, index, USB4_SB_DATA, caps,
+ sizeof(*caps) * ncaps);
}
/**
* usb4_port_hw_margin() - Run hardware lane margining on port
* @port: USB4 port
- * @lanes: Which lanes to run (must match the port capabilities). Can be
- * %0, %1 or %7.
- * @ber_level: BER level contour value
- * @timing: Perform timing margining instead of voltage
- * @right_high: Use Right/high margin instead of left/low
- * @results: Array with at least two elements to hold the results
+ * @target: Sideband target
+ * @index: Retimer index if taget is %USB4_SB_TARGET_RETIMER
+ * @params: Parameters for USB4 hardware margining
+ * @results: Array to hold the results
+ * @nresults: Number of elements in the results array
*
* Runs hardware lane margining on USB4 port and returns the result in
* @results.
*/
-int usb4_port_hw_margin(struct tb_port *port, unsigned int lanes,
- unsigned int ber_level, bool timing, bool right_high,
- u32 *results)
+int usb4_port_hw_margin(struct tb_port *port, enum usb4_sb_target target,
+ u8 index, const struct usb4_port_margining_params *params,
+ u32 *results, size_t nresults)
{
u32 val;
int ret;
- val = lanes;
- if (timing)
- val |= USB4_MARGIN_HW_TIME;
- if (right_high)
- val |= USB4_MARGIN_HW_RH;
- if (ber_level)
- val |= (ber_level << USB4_MARGIN_HW_BER_SHIFT) &
- USB4_MARGIN_HW_BER_MASK;
+ if (WARN_ON_ONCE(!params))
+ return -EINVAL;
- ret = usb4_port_sb_write(port, USB4_SB_TARGET_ROUTER, 0,
- USB4_SB_METADATA, &val, sizeof(val));
+ val = params->lanes;
+ if (params->time)
+ val |= USB4_MARGIN_HW_TIME;
+ if (params->right_high || params->upper_eye)
+ val |= USB4_MARGIN_HW_RHU;
+ if (params->ber_level)
+ val |= FIELD_PREP(USB4_MARGIN_HW_BER_MASK, params->ber_level);
+ if (params->optional_voltage_offset_range)
+ val |= USB4_MARGIN_HW_OPT_VOLTAGE;
+
+ ret = usb4_port_sb_write(port, target, index, USB4_SB_METADATA, &val,
+ sizeof(val));
if (ret)
return ret;
- ret = usb4_port_sb_op(port, USB4_SB_TARGET_ROUTER, 0,
+ ret = usb4_port_sb_op(port, target, index,
USB4_SB_OPCODE_RUN_HW_LANE_MARGINING, 2500);
if (ret)
return ret;
- return usb4_port_sb_read(port, USB4_SB_TARGET_ROUTER, 0,
- USB4_SB_DATA, results, sizeof(*results) * 2);
+ return usb4_port_sb_read(port, target, index, USB4_SB_DATA, results,
+ sizeof(*results) * nresults);
}
/**
* usb4_port_sw_margin() - Run software lane margining on port
* @port: USB4 port
- * @lanes: Which lanes to run (must match the port capabilities). Can be
- * %0, %1 or %7.
- * @timing: Perform timing margining instead of voltage
- * @right_high: Use Right/high margin instead of left/low
- * @counter: What to do with the error counter
+ * @target: Sideband target
+ * @index: Retimer index if taget is %USB4_SB_TARGET_RETIMER
+ * @params: Parameters for USB4 software margining
+ * @results: Data word for the operation completion data
*
* Runs software lane margining on USB4 port. Read back the error
* counters by calling usb4_port_sw_margin_errors(). Returns %0 in
* success and negative errno otherwise.
*/
-int usb4_port_sw_margin(struct tb_port *port, unsigned int lanes, bool timing,
- bool right_high, u32 counter)
+int usb4_port_sw_margin(struct tb_port *port, enum usb4_sb_target target,
+ u8 index, const struct usb4_port_margining_params *params,
+ u32 *results)
{
u32 val;
int ret;
- val = lanes;
- if (timing)
+ if (WARN_ON_ONCE(!params))
+ return -EINVAL;
+
+ val = params->lanes;
+ if (params->time)
val |= USB4_MARGIN_SW_TIME;
- if (right_high)
+ if (params->optional_voltage_offset_range)
+ val |= USB4_MARGIN_SW_OPT_VOLTAGE;
+ if (params->right_high)
val |= USB4_MARGIN_SW_RH;
- val |= (counter << USB4_MARGIN_SW_COUNTER_SHIFT) &
- USB4_MARGIN_SW_COUNTER_MASK;
+ if (params->upper_eye)
+ val |= USB4_MARGIN_SW_UPPER_EYE;
+ val |= FIELD_PREP(USB4_MARGIN_SW_COUNTER_MASK, params->error_counter);
+ val |= FIELD_PREP(USB4_MARGIN_SW_VT_MASK, params->voltage_time_offset);
- ret = usb4_port_sb_write(port, USB4_SB_TARGET_ROUTER, 0,
- USB4_SB_METADATA, &val, sizeof(val));
+ ret = usb4_port_sb_write(port, target, index, USB4_SB_METADATA, &val,
+ sizeof(val));
+ if (ret)
+ return ret;
+
+ ret = usb4_port_sb_op(port, target, index,
+ USB4_SB_OPCODE_RUN_SW_LANE_MARGINING, 2500);
if (ret)
return ret;
- return usb4_port_sb_op(port, USB4_SB_TARGET_ROUTER, 0,
- USB4_SB_OPCODE_RUN_SW_LANE_MARGINING, 2500);
+ return usb4_port_sb_read(port, target, index, USB4_SB_DATA, results,
+ sizeof(*results));
+
}
/**
* usb4_port_sw_margin_errors() - Read the software margining error counters
* @port: USB4 port
+ * @target: Sideband target
+ * @index: Retimer index if taget is %USB4_SB_TARGET_RETIMER
* @errors: Error metadata is copied here.
*
* This reads back the software margining error counters from the port.
* Returns %0 in success and negative errno otherwise.
*/
-int usb4_port_sw_margin_errors(struct tb_port *port, u32 *errors)
+int usb4_port_sw_margin_errors(struct tb_port *port, enum usb4_sb_target target,
+ u8 index, u32 *errors)
{
int ret;
- ret = usb4_port_sb_op(port, USB4_SB_TARGET_ROUTER, 0,
+ ret = usb4_port_sb_op(port, target, index,
USB4_SB_OPCODE_READ_SW_MARGIN_ERR, 150);
if (ret)
return ret;
- return usb4_port_sb_read(port, USB4_SB_TARGET_ROUTER, 0,
- USB4_SB_METADATA, errors, sizeof(*errors));
+ return usb4_port_sb_read(port, target, index, USB4_SB_METADATA, errors,
+ sizeof(*errors));
}
static inline int usb4_port_retimer_op(struct tb_port *port, u8 index,
@@ -1770,68 +1824,51 @@ int usb4_port_retimer_unset_inbound_sbtx(struct tb_port *port, u8 index)
}
/**
- * usb4_port_retimer_read() - Read from retimer sideband registers
+ * usb4_port_retimer_is_last() - Is the retimer last on-board retimer
* @port: USB4 port
* @index: Retimer index
- * @reg: Sideband register to read
- * @buf: Data from @reg is stored here
- * @size: Number of bytes to read
*
- * Function reads retimer sideband registers starting from @reg. The
- * retimer is connected to @port at @index. Returns %0 in case of
- * success, and read data is copied to @buf. If there is no retimer
- * present at given @index returns %-ENODEV. In any other failure
- * returns negative errno.
+ * If the retimer at @index is last one (connected directly to the
+ * Type-C port) this function returns %1. If it is not returns %0. If
+ * the retimer is not present returns %-ENODEV. Otherwise returns
+ * negative errno.
*/
-int usb4_port_retimer_read(struct tb_port *port, u8 index, u8 reg, void *buf,
- u8 size)
+int usb4_port_retimer_is_last(struct tb_port *port, u8 index)
{
- return usb4_port_sb_read(port, USB4_SB_TARGET_RETIMER, index, reg, buf,
- size);
-}
+ u32 metadata;
+ int ret;
-/**
- * usb4_port_retimer_write() - Write to retimer sideband registers
- * @port: USB4 port
- * @index: Retimer index
- * @reg: Sideband register to write
- * @buf: Data that is written starting from @reg
- * @size: Number of bytes to write
- *
- * Writes retimer sideband registers starting from @reg. The retimer is
- * connected to @port at @index. Returns %0 in case of success. If there
- * is no retimer present at given @index returns %-ENODEV. In any other
- * failure returns negative errno.
- */
-int usb4_port_retimer_write(struct tb_port *port, u8 index, u8 reg,
- const void *buf, u8 size)
-{
- return usb4_port_sb_write(port, USB4_SB_TARGET_RETIMER, index, reg, buf,
- size);
+ ret = usb4_port_retimer_op(port, index, USB4_SB_OPCODE_QUERY_LAST_RETIMER,
+ 500);
+ if (ret)
+ return ret;
+
+ ret = usb4_port_sb_read(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_METADATA, &metadata, sizeof(metadata));
+ return ret ? ret : metadata & 1;
}
/**
- * usb4_port_retimer_is_last() - Is the retimer last on-board retimer
+ * usb4_port_retimer_is_cable() - Is the retimer cable retimer
* @port: USB4 port
* @index: Retimer index
*
- * If the retimer at @index is last one (connected directly to the
- * Type-C port) this function returns %1. If it is not returns %0. If
- * the retimer is not present returns %-ENODEV. Otherwise returns
- * negative errno.
+ * If the retimer at @index is last cable retimer this function returns
+ * %1 and %0 if it is on-board retimer. In case a retimer is not present
+ * at @index returns %-ENODEV. Otherwise returns negative errno.
*/
-int usb4_port_retimer_is_last(struct tb_port *port, u8 index)
+int usb4_port_retimer_is_cable(struct tb_port *port, u8 index)
{
u32 metadata;
int ret;
- ret = usb4_port_retimer_op(port, index, USB4_SB_OPCODE_QUERY_LAST_RETIMER,
+ ret = usb4_port_retimer_op(port, index, USB4_SB_OPCODE_QUERY_CABLE_RETIMER,
500);
if (ret)
return ret;
- ret = usb4_port_retimer_read(port, index, USB4_SB_METADATA, &metadata,
- sizeof(metadata));
+ ret = usb4_port_sb_read(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_METADATA, &metadata, sizeof(metadata));
return ret ? ret : metadata & 1;
}
@@ -1856,8 +1893,8 @@ int usb4_port_retimer_nvm_sector_size(struct tb_port *port, u8 index)
if (ret)
return ret;
- ret = usb4_port_retimer_read(port, index, USB4_SB_METADATA, &metadata,
- sizeof(metadata));
+ ret = usb4_port_sb_read(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_METADATA, &metadata, sizeof(metadata));
return ret ? ret : metadata & USB4_NVM_SECTOR_SIZE_MASK;
}
@@ -1882,8 +1919,8 @@ int usb4_port_retimer_nvm_set_offset(struct tb_port *port, u8 index,
metadata = (dwaddress << USB4_NVM_SET_OFFSET_SHIFT) &
USB4_NVM_SET_OFFSET_MASK;
- ret = usb4_port_retimer_write(port, index, USB4_SB_METADATA, &metadata,
- sizeof(metadata));
+ ret = usb4_port_sb_write(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_METADATA, &metadata, sizeof(metadata));
if (ret)
return ret;
@@ -1905,8 +1942,8 @@ static int usb4_port_retimer_nvm_write_next_block(void *data,
u8 index = info->index;
int ret;
- ret = usb4_port_retimer_write(port, index, USB4_SB_DATA,
- buf, dwords * 4);
+ ret = usb4_port_sb_write(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_DATA, buf, dwords * 4);
if (ret)
return ret;
@@ -1985,8 +2022,8 @@ int usb4_port_retimer_nvm_authenticate_status(struct tb_port *port, u8 index,
u32 metadata, val;
int ret;
- ret = usb4_port_retimer_read(port, index, USB4_SB_OPCODE, &val,
- sizeof(val));
+ ret = usb4_port_sb_read(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_OPCODE, &val, sizeof(val));
if (ret)
return ret;
@@ -1997,8 +2034,9 @@ int usb4_port_retimer_nvm_authenticate_status(struct tb_port *port, u8 index,
return 0;
case -EAGAIN:
- ret = usb4_port_retimer_read(port, index, USB4_SB_METADATA,
- &metadata, sizeof(metadata));
+ ret = usb4_port_sb_read(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_METADATA, &metadata,
+ sizeof(metadata));
if (ret)
return ret;
@@ -2023,8 +2061,8 @@ static int usb4_port_retimer_nvm_read_block(void *data, unsigned int dwaddress,
if (dwords < USB4_DATA_DWORDS)
metadata |= dwords << USB4_NVM_READ_LENGTH_SHIFT;
- ret = usb4_port_retimer_write(port, index, USB4_SB_METADATA, &metadata,
- sizeof(metadata));
+ ret = usb4_port_sb_write(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_METADATA, &metadata, sizeof(metadata));
if (ret)
return ret;
@@ -2032,8 +2070,8 @@ static int usb4_port_retimer_nvm_read_block(void *data, unsigned int dwaddress,
if (ret)
return ret;
- return usb4_port_retimer_read(port, index, USB4_SB_DATA, buf,
- dwords * 4);
+ return usb4_port_sb_read(port, USB4_SB_TARGET_RETIMER, index,
+ USB4_SB_DATA, buf, dwords * 4);
}
/**
@@ -2123,7 +2161,8 @@ static int usb4_usb3_port_cm_request(struct tb_port *port, bool request)
*/
val &= ADP_USB3_CS_2_CMR;
return usb4_port_wait_for_bit(port, port->cap_adap + ADP_USB3_CS_1,
- ADP_USB3_CS_1_HCA, val, 1500);
+ ADP_USB3_CS_1_HCA, val, 1500,
+ USB4_PORT_DELAY);
}
static inline int usb4_usb3_port_set_cm_request(struct tb_port *port)
generated by cgit (git 2.34.1) at 2025-07-25 15:22:16 +0000