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Message-Id: <20201119155523.41332-9-mika.westerberg@linux.intel.com>
Date: Thu, 19 Nov 2020 18:55:19 +0300
From: Mika Westerberg <mika.westerberg@...ux.intel.com>
To: linux-kernel@...r.kernel.org
Cc: Yehezkel Bernat <YehezkelShB@...il.com>,
Michael Jamet <michael.jamet@...el.com>,
Andreas Noever <andreas.noever@...il.com>,
Lukas Wunner <lukas@...ner.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [PATCH 08/12] thunderbolt: Pass TX and RX data directly to usb4_switch_op()
We are going to make usb4_switch_op() to match better the corresponding
firmware (ICM) USB4 router operation proxy interface, so that we can use
either based on the connection manager implementation.
For this reason rename usb4_switch_op() to __usb4_switch_op() that
provides the most complete interface. Then make usb4_switch_op() and
usb4_switch_op_data() call it with correct set of parameters and update
the callers accordingly.
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
---
drivers/thunderbolt/usb4.c | 85 +++++++++++++++++++++-----------------
1 file changed, 48 insertions(+), 37 deletions(-)
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c
index 5f3237d66987..c1bb5ec6e1db 100644
--- a/drivers/thunderbolt/usb4.c
+++ b/drivers/thunderbolt/usb4.c
@@ -74,24 +74,6 @@ static int usb4_switch_wait_for_bit(struct tb_switch *sw, u32 offset, u32 bit,
return -ETIMEDOUT;
}
-static int usb4_switch_op_read_data(struct tb_switch *sw, void *data,
- size_t dwords)
-{
- if (dwords > USB4_DATA_DWORDS)
- return -EINVAL;
-
- return tb_sw_read(sw, data, TB_CFG_SWITCH, ROUTER_CS_9, dwords);
-}
-
-static int usb4_switch_op_write_data(struct tb_switch *sw, const void *data,
- size_t dwords)
-{
- if (dwords > USB4_DATA_DWORDS)
- return -EINVAL;
-
- return tb_sw_write(sw, data, TB_CFG_SWITCH, ROUTER_CS_9, dwords);
-}
-
static int usb4_do_read_data(u16 address, void *buf, size_t size,
read_block_fn read_block, void *read_block_data)
{
@@ -161,17 +143,27 @@ static int usb4_do_write_data(unsigned int address, const void *buf, size_t size
return 0;
}
-static int usb4_switch_op(struct tb_switch *sw, u16 opcode, u32 *metadata,
- u8 *status)
+static int __usb4_switch_op(struct tb_switch *sw, u16 opcode, u32 *metadata,
+ u8 *status, const void *tx_data, size_t tx_dwords,
+ void *rx_data, size_t rx_dwords)
{
u32 val;
int ret;
+ if (tx_dwords > USB4_DATA_DWORDS || rx_dwords > USB4_DATA_DWORDS)
+ return -EINVAL;
+
if (metadata) {
ret = tb_sw_write(sw, metadata, TB_CFG_SWITCH, ROUTER_CS_25, 1);
if (ret)
return ret;
}
+ if (tx_dwords) {
+ ret = tb_sw_write(sw, tx_data, TB_CFG_SWITCH, ROUTER_CS_9,
+ tx_dwords);
+ if (ret)
+ return ret;
+ }
val = opcode | ROUTER_CS_26_OV;
ret = tb_sw_write(sw, &val, TB_CFG_SWITCH, ROUTER_CS_26, 1);
@@ -193,8 +185,34 @@ static int usb4_switch_op(struct tb_switch *sw, u16 opcode, u32 *metadata,
*status = (val & ROUTER_CS_26_STATUS_MASK) >>
ROUTER_CS_26_STATUS_SHIFT;
- return metadata ?
- tb_sw_read(sw, metadata, TB_CFG_SWITCH, ROUTER_CS_25, 1) : 0;
+ if (metadata) {
+ ret = tb_sw_read(sw, metadata, TB_CFG_SWITCH, ROUTER_CS_25, 1);
+ if (ret)
+ return ret;
+ }
+ if (rx_dwords) {
+ ret = tb_sw_read(sw, rx_data, TB_CFG_SWITCH, ROUTER_CS_9,
+ rx_dwords);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static inline int usb4_switch_op(struct tb_switch *sw, u16 opcode,
+ u32 *metadata, u8 *status)
+{
+ return __usb4_switch_op(sw, opcode, metadata, status, NULL, 0, NULL, 0);
+}
+
+static inline int usb4_switch_op_data(struct tb_switch *sw, u16 opcode,
+ u32 *metadata, u8 *status,
+ const void *tx_data, size_t tx_dwords,
+ void *rx_data, size_t rx_dwords)
+{
+ return __usb4_switch_op(sw, opcode, metadata, status, tx_data,
+ tx_dwords, rx_data, rx_dwords);
}
static void usb4_switch_check_wakes(struct tb_switch *sw)
@@ -349,14 +367,12 @@ static int usb4_switch_drom_read_block(void *data,
metadata |= (dwaddress << USB4_DROM_ADDRESS_SHIFT) &
USB4_DROM_ADDRESS_MASK;
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_DROM_READ, &metadata, &status);
+ ret = usb4_switch_op_data(sw, USB4_SWITCH_OP_DROM_READ, &metadata,
+ &status, NULL, 0, buf, dwords);
if (ret)
return ret;
- if (status)
- return -EIO;
-
- return usb4_switch_op_read_data(sw, buf, dwords);
+ return status ? -EIO : 0;
}
/**
@@ -529,14 +545,12 @@ static int usb4_switch_nvm_read_block(void *data,
metadata |= (dwaddress << USB4_NVM_READ_OFFSET_SHIFT) &
USB4_NVM_READ_OFFSET_MASK;
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_READ, &metadata, &status);
+ ret = usb4_switch_op_data(sw, USB4_SWITCH_OP_NVM_READ, &metadata,
+ &status, NULL, 0, buf, dwords);
if (ret)
return ret;
- if (status)
- return -EIO;
-
- return usb4_switch_op_read_data(sw, buf, dwords);
+ return status ? -EIO : 0;
}
/**
@@ -582,11 +596,8 @@ static int usb4_switch_nvm_write_next_block(void *data, const void *buf,
u8 status;
int ret;
- ret = usb4_switch_op_write_data(sw, buf, dwords);
- if (ret)
- return ret;
-
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_WRITE, NULL, &status);
+ ret = usb4_switch_op_data(sw, USB4_SWITCH_OP_NVM_WRITE, NULL, &status,
+ buf, dwords, NULL, 0);
if (ret)
return ret;
--
2.29.2
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