We do this for Thunderbolt 2/3 devices through DMA port, USB4 devices
and retimers pretty much the same way. Only the actual block read/write
is different. For this reason split out the NVM read/write functions
from usb4.c to nvm.c and make USB4 device code call these when needed.
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
drivers/thunderbolt/nvm.c | 95 ++++++++++++++++++++++++++++++++
drivers/thunderbolt/tb.h | 11 ++++
drivers/thunderbolt/usb4.c | 110 ++++++-------------------------------
3 files changed, 124 insertions(+), 92 deletions(-)
diff --git a/drivers/thunderbolt/nvm.c b/drivers/thunderbolt/nvm.c
index 29de6d95c6e7..3a5336913cca 100644
--- a/drivers/thunderbolt/nvm.c
+++ b/drivers/thunderbolt/nvm.c
@@ -164,6 +164,101 @@ void tb_nvm_free(struct tb_nvm *nvm)
kfree(nvm);
}
+/**
+ * tb_nvm_read_data() - Read data from NVM
+ * @address: Start address on the flash
+ * @buf: Buffer where the read data is copied
+ * @size: Size of the buffer in bytes
+ * @retries: Number of retries if block read fails
+ * @read_block: Function that reads block from the flash
+ * @read_block_data: Data passsed to @read_block
+ *
+ * This is a generic function that reads data from NVM or NVM like
+ * device.
+ *
+ * Returns %0 on success and negative errno otherwise.
+ */
+int tb_nvm_read_data(unsigned int address, void *buf, size_t size,
+ unsigned int retries, read_block_fn read_block,
+ void *read_block_data)
+{
+ do {
+ unsigned int dwaddress, dwords, offset;
+ u8 data[NVM_DATA_DWORDS * 4];
+ size_t nbytes;
+ int ret;
+
+ offset = address & 3;
+ nbytes = min_t(size_t, size + offset, NVM_DATA_DWORDS * 4);
+
+ dwaddress = address / 4;
+ dwords = ALIGN(nbytes, 4) / 4;
+
+ ret = read_block(read_block_data, dwaddress, data, dwords);
+ if (ret) {
+ if (ret != -ENODEV && retries--)
+ continue;
+ return ret;
+ }
+
+ nbytes -= offset;
+ memcpy(buf, data + offset, nbytes);
+
+ size -= nbytes;
+ address += nbytes;
+ buf += nbytes;
+ } while (size > 0);
+
+ return 0;
+}
+
+/**
+ * tb_nvm_write_data() - Write data to NVM
+ * @address: Start address on the flash
+ * @buf: Buffer where the data is copied from
+ * @size: Size of the buffer in bytes
+ * @retries: Number of retries if the block write fails
+ * @write_block: Function that writes block to the flash
+ * @write_block_data: Data passwd to @write_block
+ *
+ * This is generic function that writes data to NVM or NVM like device.
+ *
+ * Returns %0 on success and negative errno otherwise.
+ */
+int tb_nvm_write_data(unsigned int address, const void *buf, size_t size,
+ unsigned int retries, write_block_fn write_block,
+ void *write_block_data)
+{
+ do {
+ unsigned int offset, dwaddress;
+ u8 data[NVM_DATA_DWORDS * 4];
+ size_t nbytes;
+ int ret;
+
+ offset = address & 3;
+ nbytes = min_t(u32, size + offset, NVM_DATA_DWORDS * 4);
+
+ memcpy(data + offset, buf, nbytes);
+
+ dwaddress = address / 4;
+ ret = write_block(write_block_data, dwaddress, data, nbytes / 4);
+ if (ret) {
+ if (ret == -ETIMEDOUT) {
+ if (retries--)
+ continue;
+ ret = -EIO;
+ }
+ return ret;
+ }
+
+ size -= nbytes;
+ address += nbytes;
+ buf += nbytes;
+ } while (size > 0);
+
+ return 0;
+}
+
void tb_nvm_exit(void)
{
ida_destroy(&nvm_ida);
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 9790e9f13d2b..d9d1adc4cfd3 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -20,6 +20,7 @@
#define NVM_MIN_SIZE SZ_32K
#define NVM_MAX_SIZE SZ_512K
+#define NVM_DATA_DWORDS 16
/* Intel specific NVM offsets */
#define NVM_DEVID 0x05
@@ -674,6 +675,16 @@ int tb_nvm_add_non_active(struct tb_nvm *nvm, size_t size,
void tb_nvm_free(struct tb_nvm *nvm);
void tb_nvm_exit(void);
+typedef int (*read_block_fn)(void *, unsigned int, void *, size_t);
+typedef int (*write_block_fn)(void *, unsigned int, const void *, size_t);
+
+int tb_nvm_read_data(unsigned int address, void *buf, size_t size,
+ unsigned int retries, read_block_fn read_block,
+ void *read_block_data);
+int tb_nvm_write_data(unsigned int address, const void *buf, size_t size,
+ unsigned int retries, write_block_fn write_next_block,
+ void *write_block_data);
+
struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
u64 route);
struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb,
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c
index 671d72af8ba1..c0a14bfa36d4 100644
--- a/drivers/thunderbolt/usb4.c
+++ b/drivers/thunderbolt/usb4.c
@@ -13,7 +13,6 @@
#include "sb_regs.h"
#include "tb.h"
-#define USB4_DATA_DWORDS 16
#define USB4_DATA_RETRIES 3
enum usb4_sb_target {
@@ -37,9 +36,6 @@ enum usb4_sb_target {
#define USB4_NVM_SECTOR_SIZE_MASK GENMASK(23, 0)
-typedef int (*read_block_fn)(void *, unsigned int, void *, size_t);
-typedef int (*write_block_fn)(void *, const void *, size_t);
-
static int usb4_switch_wait_for_bit(struct tb_switch *sw, u32 offset, u32 bit,
u32 value, int timeout_msec)
{
@@ -62,76 +58,6 @@ static int usb4_switch_wait_for_bit(struct tb_switch *sw, u32 offset, u32 bit,
return -ETIMEDOUT;
}
-static int usb4_do_read_data(u16 address, void *buf, size_t size,
- read_block_fn read_block, void *read_block_data)
-{
- unsigned int retries = USB4_DATA_RETRIES;
- unsigned int offset;
-
- do {
- unsigned int dwaddress, dwords;
- u8 data[USB4_DATA_DWORDS * 4];
- size_t nbytes;
- int ret;
-
- offset = address & 3;
- nbytes = min_t(size_t, size + offset, USB4_DATA_DWORDS * 4);
-
- dwaddress = address / 4;
- dwords = ALIGN(nbytes, 4) / 4;
-
- ret = read_block(read_block_data, dwaddress, data, dwords);
- if (ret) {
- if (ret != -ENODEV && retries--)
- continue;
- return ret;
- }
-
- nbytes -= offset;
- memcpy(buf, data + offset, nbytes);
-
- size -= nbytes;
- address += nbytes;
- buf += nbytes;
- } while (size > 0);
-
- return 0;
-}
-
-static int usb4_do_write_data(unsigned int address, const void *buf, size_t size,
- write_block_fn write_next_block, void *write_block_data)
-{
- unsigned int retries = USB4_DATA_RETRIES;
- unsigned int offset;
-
- offset = address & 3;
- address = address & ~3;
-
- do {
- u32 nbytes = min_t(u32, size, USB4_DATA_DWORDS * 4);
- u8 data[USB4_DATA_DWORDS * 4];
- int ret;
-
- memcpy(data + offset, buf, nbytes);
-
- ret = write_next_block(write_block_data, data, nbytes / 4);
- if (ret) {
- if (ret == -ETIMEDOUT) {
- if (retries--)
- continue;
- ret = -EIO;
- }
- return ret;
- }
-
- size -= nbytes;
- address += nbytes;
- buf += nbytes;
- } while (size > 0);
-
- return 0;
-}
-
static int usb4_native_switch_op(struct tb_switch *sw, u16 opcode,
u32 *metadata, u8 *status,
const void *tx_data, size_t tx_dwords,
@@ -193,7 +119,7 @@ static int __usb4_switch_op(struct tb_switch *sw, u16 opcode, u32 *metadata,
{
const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
- if (tx_dwords > USB4_DATA_DWORDS || rx_dwords > USB4_DATA_DWORDS)
+ if (tx_dwords > NVM_DATA_DWORDS || rx_dwords > NVM_DATA_DWORDS)
return -EINVAL;
/*
@@ -414,8 +340,8 @@ static int usb4_switch_drom_read_block(void *data,
int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
size_t size)
{
- return usb4_do_read_data(address, buf, size,
- usb4_switch_drom_read_block, sw);
+ return tb_nvm_read_data(address, buf, size, USB4_DATA_RETRIES,
+ usb4_switch_drom_read_block, sw);
}
/**
@@ -595,8 +521,8 @@ static int usb4_switch_nvm_read_block(void *data,
int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
size_t size)
{
- return usb4_do_read_data(address, buf, size,
- usb4_switch_nvm_read_block, sw);
+ return tb_nvm_read_data(address, buf, size, USB4_DATA_RETRIES,
+ usb4_switch_nvm_read_block, sw);
}
static int usb4_switch_nvm_set_offset(struct tb_switch *sw,
@@ -618,8 +544,8 @@ static int usb4_switch_nvm_set_offset(struct tb_switch *sw,
return status ? -EIO : 0;
}
-static int usb4_switch_nvm_write_next_block(void *data, const void *buf,
- size_t dwords)
+static int usb4_switch_nvm_write_next_block(void *data, unsigned int dwaddress,
+ const void *buf, size_t dwords)
{
struct tb_switch *sw = data;
u8 status;
@@ -652,8 +578,8 @@ int usb4_switch_nvm_write(struct tb_switch *sw, unsigned int address,
if (ret)
return ret;
- return usb4_do_write_data(address, buf, size,
- usb4_switch_nvm_write_next_block, sw);
+ return tb_nvm_write_data(address, buf, size, USB4_DATA_RETRIES,
+ usb4_switch_nvm_write_next_block, sw);
}
/**
@@ -1029,7 +955,7 @@ static int usb4_port_wait_for_bit(struct tb_port *port, u32 offset, u32 bit,
static int usb4_port_read_data(struct tb_port *port, void *data, size_t dwords)
{
- if (dwords > USB4_DATA_DWORDS)
+ if (dwords > NVM_DATA_DWORDS)
return -EINVAL;
return tb_port_read(port, data, TB_CFG_PORT, port->cap_usb4 + PORT_CS_2,
@@ -1039,7 +965,7 @@ static int usb4_port_read_data(struct tb_port *port, void *data, size_t dwords)
static int usb4_port_write_data(struct tb_port *port, const void *data,
size_t dwords)
{
- if (dwords > USB4_DATA_DWORDS)
+ if (dwords > NVM_DATA_DWORDS)
return -EINVAL;
return tb_port_write(port, data, TB_CFG_PORT, port->cap_usb4 + PORT_CS_2,
@@ -1316,8 +1242,8 @@ struct retimer_info {
u8 index;
};
-static int usb4_port_retimer_nvm_write_next_block(void *data, const void *buf,
- size_t dwords)
+static int usb4_port_retimer_nvm_write_next_block(void *data,
+ unsigned int dwaddress, const void *buf, size_t dwords)
{
const struct retimer_info *info = data;
@@ -1357,8 +1283,8 @@ int usb4_port_retimer_nvm_write(struct tb_port *port, u8 index, unsigned int add
if (ret)
return ret;
- return usb4_do_write_data(address, buf, size,
- usb4_port_retimer_nvm_write_next_block, &info);
+ return tb_nvm_write_data(address, buf, size, USB4_DATA_RETRIES,
+ usb4_port_retimer_nvm_write_next_block, &info);
}
/**
@@ -1442,7 +1368,7 @@ static int usb4_port_retimer_nvm_read_block(void *data, unsigned int dwaddress,
int ret;
metadata = dwaddress << USB4_NVM_READ_OFFSET_SHIFT;
- if (dwords < USB4_DATA_DWORDS)
+ if (dwords < NVM_DATA_DWORDS)
metadata |= dwords << USB4_NVM_READ_LENGTH_SHIFT;
ret = usb4_port_retimer_write(port, index, USB4_SB_METADATA, &metadata,
@@ -1475,8 +1401,8 @@ int usb4_port_retimer_nvm_read(struct tb_port *port, u8 index,
{
struct retimer_info info = { .port = port, .index = index };
- return usb4_do_read_data(address, buf, size,
- usb4_port_retimer_nvm_read_block, &info);
+ return tb_nvm_read_data(address, buf, size, USB4_DATA_RETRIES,
+ usb4_port_retimer_nvm_read_block, &info);
}
/**
--
2.30.2
