mirror of https://gitee.com/openkylin/linux.git
thunderbolt: Split NVM read/write generic functions out from usb4.c
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@linux.intel.com>
This commit is contained in:
Mika Westerberg
parent
fe6f6f9591
commit
9b38303777
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@ -164,6 +164,101 @@ void tb_nvm_free(struct tb_nvm *nvm)
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kfree(nvm);
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}
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/**
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* tb_nvm_read_data() - Read data from NVM
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* @address: Start address on the flash
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* @buf: Buffer where the read data is copied
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* @size: Size of the buffer in bytes
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* @retries: Number of retries if block read fails
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* @read_block: Function that reads block from the flash
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* @read_block_data: Data passsed to @read_block
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*
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* This is a generic function that reads data from NVM or NVM like
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* device.
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*
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* Returns %0 on success and negative errno otherwise.
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*/
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int tb_nvm_read_data(unsigned int address, void *buf, size_t size,
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unsigned int retries, read_block_fn read_block,
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void *read_block_data)
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{
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do {
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unsigned int dwaddress, dwords, offset;
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u8 data[NVM_DATA_DWORDS * 4];
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size_t nbytes;
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int ret;
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offset = address & 3;
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nbytes = min_t(size_t, size + offset, NVM_DATA_DWORDS * 4);
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dwaddress = address / 4;
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dwords = ALIGN(nbytes, 4) / 4;
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ret = read_block(read_block_data, dwaddress, data, dwords);
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if (ret) {
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if (ret != -ENODEV && retries--)
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continue;
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return ret;
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}
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nbytes -= offset;
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memcpy(buf, data + offset, nbytes);
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size -= nbytes;
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address += nbytes;
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buf += nbytes;
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} while (size > 0);
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return 0;
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}
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/**
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* tb_nvm_write_data() - Write data to NVM
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* @address: Start address on the flash
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* @buf: Buffer where the data is copied from
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* @size: Size of the buffer in bytes
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* @retries: Number of retries if the block write fails
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* @write_block: Function that writes block to the flash
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* @write_block_data: Data passwd to @write_block
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*
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* This is generic function that writes data to NVM or NVM like device.
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*
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* Returns %0 on success and negative errno otherwise.
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*/
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int tb_nvm_write_data(unsigned int address, const void *buf, size_t size,
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unsigned int retries, write_block_fn write_block,
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void *write_block_data)
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{
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do {
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unsigned int offset, dwaddress;
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u8 data[NVM_DATA_DWORDS * 4];
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size_t nbytes;
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int ret;
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offset = address & 3;
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nbytes = min_t(u32, size + offset, NVM_DATA_DWORDS * 4);
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memcpy(data + offset, buf, nbytes);
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dwaddress = address / 4;
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ret = write_block(write_block_data, dwaddress, data, nbytes / 4);
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if (ret) {
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if (ret == -ETIMEDOUT) {
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if (retries--)
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continue;
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ret = -EIO;
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}
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return ret;
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}
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size -= nbytes;
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address += nbytes;
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buf += nbytes;
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} while (size > 0);
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return 0;
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}
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void tb_nvm_exit(void)
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{
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ida_destroy(&nvm_ida);
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@ -20,6 +20,7 @@
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#define NVM_MIN_SIZE SZ_32K
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#define NVM_MAX_SIZE SZ_512K
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#define NVM_DATA_DWORDS 16
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/* Intel specific NVM offsets */
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#define NVM_DEVID 0x05
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@ -674,6 +675,16 @@ int tb_nvm_add_non_active(struct tb_nvm *nvm, size_t size,
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void tb_nvm_free(struct tb_nvm *nvm);
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void tb_nvm_exit(void);
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typedef int (*read_block_fn)(void *, unsigned int, void *, size_t);
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typedef int (*write_block_fn)(void *, unsigned int, const void *, size_t);
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int tb_nvm_read_data(unsigned int address, void *buf, size_t size,
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unsigned int retries, read_block_fn read_block,
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void *read_block_data);
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int tb_nvm_write_data(unsigned int address, const void *buf, size_t size,
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unsigned int retries, write_block_fn write_next_block,
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void *write_block_data);
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struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
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u64 route);
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struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb,
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@ -13,7 +13,6 @@
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#include "sb_regs.h"
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#include "tb.h"
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#define USB4_DATA_DWORDS 16
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#define USB4_DATA_RETRIES 3
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enum usb4_sb_target {
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@ -37,9 +36,6 @@ enum usb4_sb_target {
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#define USB4_NVM_SECTOR_SIZE_MASK GENMASK(23, 0)
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typedef int (*read_block_fn)(void *, unsigned int, void *, size_t);
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typedef int (*write_block_fn)(void *, const void *, size_t);
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static int usb4_switch_wait_for_bit(struct tb_switch *sw, u32 offset, u32 bit,
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u32 value, int timeout_msec)
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{
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@ -62,76 +58,6 @@ static int usb4_switch_wait_for_bit(struct tb_switch *sw, u32 offset, u32 bit,
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return -ETIMEDOUT;
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}
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static int usb4_do_read_data(u16 address, void *buf, size_t size,
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read_block_fn read_block, void *read_block_data)
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{
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unsigned int retries = USB4_DATA_RETRIES;
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unsigned int offset;
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do {
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unsigned int dwaddress, dwords;
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u8 data[USB4_DATA_DWORDS * 4];
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size_t nbytes;
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int ret;
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offset = address & 3;
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nbytes = min_t(size_t, size + offset, USB4_DATA_DWORDS * 4);
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dwaddress = address / 4;
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dwords = ALIGN(nbytes, 4) / 4;
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ret = read_block(read_block_data, dwaddress, data, dwords);
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if (ret) {
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if (ret != -ENODEV && retries--)
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continue;
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return ret;
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}
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nbytes -= offset;
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memcpy(buf, data + offset, nbytes);
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size -= nbytes;
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address += nbytes;
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buf += nbytes;
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} while (size > 0);
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return 0;
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}
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static int usb4_do_write_data(unsigned int address, const void *buf, size_t size,
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write_block_fn write_next_block, void *write_block_data)
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{
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unsigned int retries = USB4_DATA_RETRIES;
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unsigned int offset;
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offset = address & 3;
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address = address & ~3;
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do {
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u32 nbytes = min_t(u32, size, USB4_DATA_DWORDS * 4);
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u8 data[USB4_DATA_DWORDS * 4];
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int ret;
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memcpy(data + offset, buf, nbytes);
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ret = write_next_block(write_block_data, data, nbytes / 4);
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if (ret) {
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if (ret == -ETIMEDOUT) {
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if (retries--)
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continue;
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ret = -EIO;
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}
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return ret;
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}
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size -= nbytes;
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address += nbytes;
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buf += nbytes;
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} while (size > 0);
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return 0;
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}
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static int usb4_native_switch_op(struct tb_switch *sw, u16 opcode,
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u32 *metadata, u8 *status,
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const void *tx_data, size_t tx_dwords,
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@ -193,7 +119,7 @@ static int __usb4_switch_op(struct tb_switch *sw, u16 opcode, u32 *metadata,
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{
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const struct tb_cm_ops *cm_ops = sw->tb->cm_ops;
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if (tx_dwords > USB4_DATA_DWORDS || rx_dwords > USB4_DATA_DWORDS)
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if (tx_dwords > NVM_DATA_DWORDS || rx_dwords > NVM_DATA_DWORDS)
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return -EINVAL;
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/*
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@ -414,7 +340,7 @@ static int usb4_switch_drom_read_block(void *data,
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int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
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size_t size)
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{
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return usb4_do_read_data(address, buf, size,
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return tb_nvm_read_data(address, buf, size, USB4_DATA_RETRIES,
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usb4_switch_drom_read_block, sw);
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}
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@ -595,7 +521,7 @@ static int usb4_switch_nvm_read_block(void *data,
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int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
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size_t size)
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{
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return usb4_do_read_data(address, buf, size,
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return tb_nvm_read_data(address, buf, size, USB4_DATA_RETRIES,
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usb4_switch_nvm_read_block, sw);
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}
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@ -618,8 +544,8 @@ static int usb4_switch_nvm_set_offset(struct tb_switch *sw,
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return status ? -EIO : 0;
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}
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static int usb4_switch_nvm_write_next_block(void *data, const void *buf,
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size_t dwords)
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static int usb4_switch_nvm_write_next_block(void *data, unsigned int dwaddress,
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const void *buf, size_t dwords)
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{
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struct tb_switch *sw = data;
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u8 status;
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@ -652,7 +578,7 @@ int usb4_switch_nvm_write(struct tb_switch *sw, unsigned int address,
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if (ret)
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return ret;
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return usb4_do_write_data(address, buf, size,
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return tb_nvm_write_data(address, buf, size, USB4_DATA_RETRIES,
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usb4_switch_nvm_write_next_block, sw);
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}
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@ -1029,7 +955,7 @@ static int usb4_port_wait_for_bit(struct tb_port *port, u32 offset, u32 bit,
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static int usb4_port_read_data(struct tb_port *port, void *data, size_t dwords)
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{
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if (dwords > USB4_DATA_DWORDS)
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if (dwords > NVM_DATA_DWORDS)
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return -EINVAL;
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return tb_port_read(port, data, TB_CFG_PORT, port->cap_usb4 + PORT_CS_2,
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@ -1039,7 +965,7 @@ static int usb4_port_read_data(struct tb_port *port, void *data, size_t dwords)
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static int usb4_port_write_data(struct tb_port *port, const void *data,
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size_t dwords)
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{
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if (dwords > USB4_DATA_DWORDS)
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if (dwords > NVM_DATA_DWORDS)
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return -EINVAL;
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return tb_port_write(port, data, TB_CFG_PORT, port->cap_usb4 + PORT_CS_2,
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@ -1316,8 +1242,8 @@ struct retimer_info {
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u8 index;
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};
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static int usb4_port_retimer_nvm_write_next_block(void *data, const void *buf,
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size_t dwords)
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static int usb4_port_retimer_nvm_write_next_block(void *data,
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unsigned int dwaddress, const void *buf, size_t dwords)
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{
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const struct retimer_info *info = data;
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@ -1357,7 +1283,7 @@ int usb4_port_retimer_nvm_write(struct tb_port *port, u8 index, unsigned int add
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if (ret)
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return ret;
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return usb4_do_write_data(address, buf, size,
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return tb_nvm_write_data(address, buf, size, USB4_DATA_RETRIES,
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usb4_port_retimer_nvm_write_next_block, &info);
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}
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@ -1442,7 +1368,7 @@ static int usb4_port_retimer_nvm_read_block(void *data, unsigned int dwaddress,
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int ret;
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metadata = dwaddress << USB4_NVM_READ_OFFSET_SHIFT;
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if (dwords < USB4_DATA_DWORDS)
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if (dwords < NVM_DATA_DWORDS)
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metadata |= dwords << USB4_NVM_READ_LENGTH_SHIFT;
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ret = usb4_port_retimer_write(port, index, USB4_SB_METADATA, &metadata,
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@ -1475,7 +1401,7 @@ int usb4_port_retimer_nvm_read(struct tb_port *port, u8 index,
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{
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struct retimer_info info = { .port = port, .index = index };
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return usb4_do_read_data(address, buf, size,
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return tb_nvm_read_data(address, buf, size, USB4_DATA_RETRIES,
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usb4_port_retimer_nvm_read_block, &info);
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}
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