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spi: more tx_buf/rx_buf removal

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Merge series from David Lechner <dlechner@baylibre.com>:

I found a couple more controller drivers that were checking if the
tx_buf and rx_buf fields in the spi_transfer structure were set by a
peripheral driver that I missed in [1]. These checks can be removed
as well.

[1]: https://lore.kernel.org/linux-spi/20240325-spi-remove-is_dma_mapped-v2-1-d08d62b61f1c@baylibre.com/
This commit is contained in:
Mark Brown 2024-03-29 01:32:34 +00:00
commit 32e1357551
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
4 changed files with 19 additions and 36 deletions
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29
drivers/spi/spi-au1550.c
View File

@ -314,11 +314,8 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t)
hw->tx = t->tx_buf;
hw->rx = t->rx_buf;
dma_tx_addr = t->tx_dma;
dma_rx_addr = t->rx_dma;
/*
* check if buffers are already dma mapped, map them otherwise:
* - first map the TX buffer, so cache data gets written to memory
* - then map the RX buffer, so that cache entries (with
* soon-to-be-stale data) get removed
@ -326,23 +323,17 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t)
* use temp rx buffer (preallocated or realloc to fit) for rx dma
*/
if (t->tx_buf) {
if (t->tx_dma == 0) { /* if DMA_ADDR_INVALID, map it */
dma_tx_addr = dma_map_single(hw->dev,
(void *)t->tx_buf,
t->len, DMA_TO_DEVICE);
if (dma_mapping_error(hw->dev, dma_tx_addr))
dev_err(hw->dev, "tx dma map error\n");
}
dma_tx_addr = dma_map_single(hw->dev, (void *)t->tx_buf,
t->len, DMA_TO_DEVICE);
if (dma_mapping_error(hw->dev, dma_tx_addr))
dev_err(hw->dev, "tx dma map error\n");
}
if (t->rx_buf) {
if (t->rx_dma == 0) { /* if DMA_ADDR_INVALID, map it */
dma_rx_addr = dma_map_single(hw->dev,
(void *)t->rx_buf,
t->len, DMA_FROM_DEVICE);
if (dma_mapping_error(hw->dev, dma_rx_addr))
dev_err(hw->dev, "rx dma map error\n");
}
dma_rx_addr = dma_map_single(hw->dev, (void *)t->rx_buf,
t->len, DMA_FROM_DEVICE);
if (dma_mapping_error(hw->dev, dma_rx_addr))
dev_err(hw->dev, "rx dma map error\n");
} else {
if (t->len > hw->dma_rx_tmpbuf_size) {
int ret;
@ -398,10 +389,10 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t)
DMA_FROM_DEVICE);
}
/* unmap buffers if mapped above */
if (t->rx_buf && t->rx_dma == 0)
if (t->rx_buf)
dma_unmap_single(hw->dev, dma_rx_addr, t->len,
DMA_FROM_DEVICE);
if (t->tx_buf && t->tx_dma == 0)
if (t->tx_buf)
dma_unmap_single(hw->dev, dma_tx_addr, t->len,
DMA_TO_DEVICE);

14
drivers/spi/spi-fsl-cpm.c
View File

@ -98,19 +98,13 @@ static void fsl_spi_cpm_bufs_start(struct mpc8xxx_spi *mspi)
mpc8xxx_spi_write_reg(&reg_base->command, SPCOM_STR);
}
int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
struct spi_transfer *t, bool is_dma_mapped)
int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi, struct spi_transfer *t)
{
struct device *dev = mspi->dev;
struct fsl_spi_reg __iomem *reg_base = mspi->reg_base;
if (is_dma_mapped) {
mspi->map_tx_dma = 0;
mspi->map_rx_dma = 0;
} else {
mspi->map_tx_dma = 1;
mspi->map_rx_dma = 1;
}
mspi->map_tx_dma = 1;
mspi->map_rx_dma = 1;
if (!t->tx_buf) {
mspi->tx_dma = mspi->dma_dummy_tx;
@ -147,7 +141,7 @@ int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
return -ENOMEM;
}
} else if (t->tx_buf) {
mspi->tx_dma = t->tx_dma;
mspi->tx_dma = 0;
}
if (mspi->map_rx_dma) {

5
drivers/spi/spi-fsl-cpm.h
View File

@ -20,7 +20,7 @@
#ifdef CONFIG_FSL_SOC
extern void fsl_spi_cpm_reinit_txrx(struct mpc8xxx_spi *mspi);
extern int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
struct spi_transfer *t, bool is_dma_mapped);
struct spi_transfer *t);
extern void fsl_spi_cpm_bufs_complete(struct mpc8xxx_spi *mspi);
extern void fsl_spi_cpm_irq(struct mpc8xxx_spi *mspi, u32 events);
extern int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi);
@ -28,8 +28,7 @@ extern void fsl_spi_cpm_free(struct mpc8xxx_spi *mspi);
#else
static inline void fsl_spi_cpm_reinit_txrx(struct mpc8xxx_spi *mspi) { }
static inline int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
struct spi_transfer *t,
bool is_dma_mapped) { return 0; }
struct spi_transfer *t) { return 0; }
static inline void fsl_spi_cpm_bufs_complete(struct mpc8xxx_spi *mspi) { }
static inline void fsl_spi_cpm_irq(struct mpc8xxx_spi *mspi, u32 events) { }
static inline int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi) { return 0; }

7
drivers/spi/spi-fsl-spi.c
View File

@ -249,8 +249,7 @@ static int fsl_spi_cpu_bufs(struct mpc8xxx_spi *mspi,
return 0;
}
static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t,
bool is_dma_mapped)
static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
{
struct mpc8xxx_spi *mpc8xxx_spi = spi_controller_get_devdata(spi->controller);
struct fsl_spi_reg __iomem *reg_base;
@ -274,7 +273,7 @@ static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t,
reinit_completion(&mpc8xxx_spi->done);
if (mpc8xxx_spi->flags & SPI_CPM_MODE)
ret = fsl_spi_cpm_bufs(mpc8xxx_spi, t, is_dma_mapped);
ret = fsl_spi_cpm_bufs(mpc8xxx_spi, t);
else
ret = fsl_spi_cpu_bufs(mpc8xxx_spi, t, len);
if (ret)
@ -353,7 +352,7 @@ static int fsl_spi_transfer_one(struct spi_controller *controller,
if (status < 0)
return status;
if (t->len)
status = fsl_spi_bufs(spi, t, !!t->tx_dma || !!t->rx_dma);
status = fsl_spi_bufs(spi, t);
if (status > 0)
return -EMSGSIZE;