--- /dev/null
+From 58ac1b3799799069d53f5bf95c093f2fe8dd3cc5 Mon Sep 17 00:00:00 2001
+From: Arnd Bergmann <arnd@arndb.de>
+Date: Wed, 22 Nov 2023 18:15:03 +0100
+Subject: ARM: PL011: Fix DMA support
+
+From: Arnd Bergmann <arnd@arndb.de>
+
+commit 58ac1b3799799069d53f5bf95c093f2fe8dd3cc5 upstream.
+
+Since there is no guarantee that the memory returned by
+dma_alloc_coherent() is associated with a 'struct page', using the
+architecture specific phys_to_page() is wrong, but using
+virt_to_page() would be as well.
+
+Stop using sg lists altogether and just use the *_single() functions
+instead. This also simplifies the code a bit since the scatterlists in
+this driver always have only one entry anyway.
+
+https://lore.kernel.org/lkml/86db0fe5-930d-4cbb-bd7d-03367da38951@app.fastmail.com/
+ Use consistent names for dma buffers
+
+gc: Add a commit log from the initial thread:
+https://lore.kernel.org/lkml/86db0fe5-930d-4cbb-bd7d-03367da38951@app.fastmail.com/
+ Use consistent names for dma buffers
+
+Fixes: cb06ff102e2d7 ("ARM: PL011: Add support for Rx DMA buffer polling.")
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
+Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
+Cc: stable <stable@kernel.org>
+Link: https://lore.kernel.org/r/20231122171503.235649-1-gregory.clement@bootlin.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/tty/serial/amba-pl011.c | 112 +++++++++++++++++++---------------------
+ 1 file changed, 54 insertions(+), 58 deletions(-)
+
+--- a/drivers/tty/serial/amba-pl011.c
++++ b/drivers/tty/serial/amba-pl011.c
+@@ -240,17 +240,18 @@ static struct vendor_data vendor_zte = {
+
+ /* Deals with DMA transactions */
+
+-struct pl011_sgbuf {
+- struct scatterlist sg;
+- char *buf;
++struct pl011_dmabuf {
++ dma_addr_t dma;
++ size_t len;
++ char *buf;
+ };
+
+ struct pl011_dmarx_data {
+ struct dma_chan *chan;
+ struct completion complete;
+ bool use_buf_b;
+- struct pl011_sgbuf sgbuf_a;
+- struct pl011_sgbuf sgbuf_b;
++ struct pl011_dmabuf dbuf_a;
++ struct pl011_dmabuf dbuf_b;
+ dma_cookie_t cookie;
+ bool running;
+ struct timer_list timer;
+@@ -263,7 +264,8 @@ struct pl011_dmarx_data {
+
+ struct pl011_dmatx_data {
+ struct dma_chan *chan;
+- struct scatterlist sg;
++ dma_addr_t dma;
++ size_t len;
+ char *buf;
+ bool queued;
+ };
+@@ -384,32 +386,24 @@ static int pl011_fifo_to_tty(struct uart
+
+ #define PL011_DMA_BUFFER_SIZE PAGE_SIZE
+
+-static int pl011_sgbuf_init(struct dma_chan *chan, struct pl011_sgbuf *sg,
++static int pl011_dmabuf_init(struct dma_chan *chan, struct pl011_dmabuf *db,
+ enum dma_data_direction dir)
+ {
+- dma_addr_t dma_addr;
+-
+- sg->buf = dma_alloc_coherent(chan->device->dev,
+- PL011_DMA_BUFFER_SIZE, &dma_addr, GFP_KERNEL);
+- if (!sg->buf)
++ db->buf = dma_alloc_coherent(chan->device->dev, PL011_DMA_BUFFER_SIZE,
++ &db->dma, GFP_KERNEL);
++ if (!db->buf)
+ return -ENOMEM;
+-
+- sg_init_table(&sg->sg, 1);
+- sg_set_page(&sg->sg, phys_to_page(dma_addr),
+- PL011_DMA_BUFFER_SIZE, offset_in_page(dma_addr));
+- sg_dma_address(&sg->sg) = dma_addr;
+- sg_dma_len(&sg->sg) = PL011_DMA_BUFFER_SIZE;
++ db->len = PL011_DMA_BUFFER_SIZE;
+
+ return 0;
+ }
+
+-static void pl011_sgbuf_free(struct dma_chan *chan, struct pl011_sgbuf *sg,
++static void pl011_dmabuf_free(struct dma_chan *chan, struct pl011_dmabuf *db,
+ enum dma_data_direction dir)
+ {
+- if (sg->buf) {
++ if (db->buf) {
+ dma_free_coherent(chan->device->dev,
+- PL011_DMA_BUFFER_SIZE, sg->buf,
+- sg_dma_address(&sg->sg));
++ PL011_DMA_BUFFER_SIZE, db->buf, db->dma);
+ }
+ }
+
+@@ -570,8 +564,8 @@ static void pl011_dma_tx_callback(void *
+
+ spin_lock_irqsave(&uap->port.lock, flags);
+ if (uap->dmatx.queued)
+- dma_unmap_sg(dmatx->chan->device->dev, &dmatx->sg, 1,
+- DMA_TO_DEVICE);
++ dma_unmap_single(dmatx->chan->device->dev, dmatx->dma,
++ dmatx->len, DMA_TO_DEVICE);
+
+ dmacr = uap->dmacr;
+ uap->dmacr = dmacr & ~UART011_TXDMAE;
+@@ -657,18 +651,19 @@ static int pl011_dma_tx_refill(struct ua
+ memcpy(&dmatx->buf[first], &xmit->buf[0], second);
+ }
+
+- dmatx->sg.length = count;
+-
+- if (dma_map_sg(dma_dev->dev, &dmatx->sg, 1, DMA_TO_DEVICE) != 1) {
++ dmatx->len = count;
++ dmatx->dma = dma_map_single(dma_dev->dev, dmatx->buf, count,
++ DMA_TO_DEVICE);
++ if (dmatx->dma == DMA_MAPPING_ERROR) {
+ uap->dmatx.queued = false;
+ dev_dbg(uap->port.dev, "unable to map TX DMA\n");
+ return -EBUSY;
+ }
+
+- desc = dmaengine_prep_slave_sg(chan, &dmatx->sg, 1, DMA_MEM_TO_DEV,
++ desc = dmaengine_prep_slave_single(chan, dmatx->dma, dmatx->len, DMA_MEM_TO_DEV,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!desc) {
+- dma_unmap_sg(dma_dev->dev, &dmatx->sg, 1, DMA_TO_DEVICE);
++ dma_unmap_single(dma_dev->dev, dmatx->dma, dmatx->len, DMA_TO_DEVICE);
+ uap->dmatx.queued = false;
+ /*
+ * If DMA cannot be used right now, we complete this
+@@ -832,8 +827,8 @@ __acquires(&uap->port.lock)
+ dmaengine_terminate_async(uap->dmatx.chan);
+
+ if (uap->dmatx.queued) {
+- dma_unmap_sg(uap->dmatx.chan->device->dev, &uap->dmatx.sg, 1,
+- DMA_TO_DEVICE);
++ dma_unmap_single(uap->dmatx.chan->device->dev, uap->dmatx.dma,
++ uap->dmatx.len, DMA_TO_DEVICE);
+ uap->dmatx.queued = false;
+ uap->dmacr &= ~UART011_TXDMAE;
+ pl011_write(uap->dmacr, uap, REG_DMACR);
+@@ -847,15 +842,15 @@ static int pl011_dma_rx_trigger_dma(stru
+ struct dma_chan *rxchan = uap->dmarx.chan;
+ struct pl011_dmarx_data *dmarx = &uap->dmarx;
+ struct dma_async_tx_descriptor *desc;
+- struct pl011_sgbuf *sgbuf;
++ struct pl011_dmabuf *dbuf;
+
+ if (!rxchan)
+ return -EIO;
+
+ /* Start the RX DMA job */
+- sgbuf = uap->dmarx.use_buf_b ?
+- &uap->dmarx.sgbuf_b : &uap->dmarx.sgbuf_a;
+- desc = dmaengine_prep_slave_sg(rxchan, &sgbuf->sg, 1,
++ dbuf = uap->dmarx.use_buf_b ?
++ &uap->dmarx.dbuf_b : &uap->dmarx.dbuf_a;
++ desc = dmaengine_prep_slave_single(rxchan, dbuf->dma, dbuf->len,
+ DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ /*
+@@ -895,8 +890,8 @@ static void pl011_dma_rx_chars(struct ua
+ bool readfifo)
+ {
+ struct tty_port *port = &uap->port.state->port;
+- struct pl011_sgbuf *sgbuf = use_buf_b ?
+- &uap->dmarx.sgbuf_b : &uap->dmarx.sgbuf_a;
++ struct pl011_dmabuf *dbuf = use_buf_b ?
++ &uap->dmarx.dbuf_b : &uap->dmarx.dbuf_a;
+ int dma_count = 0;
+ u32 fifotaken = 0; /* only used for vdbg() */
+
+@@ -905,7 +900,7 @@ static void pl011_dma_rx_chars(struct ua
+
+ if (uap->dmarx.poll_rate) {
+ /* The data can be taken by polling */
+- dmataken = sgbuf->sg.length - dmarx->last_residue;
++ dmataken = dbuf->len - dmarx->last_residue;
+ /* Recalculate the pending size */
+ if (pending >= dmataken)
+ pending -= dmataken;
+@@ -919,7 +914,7 @@ static void pl011_dma_rx_chars(struct ua
+ * Note that tty_insert_flip_buf() tries to take as many chars
+ * as it can.
+ */
+- dma_count = tty_insert_flip_string(port, sgbuf->buf + dmataken,
++ dma_count = tty_insert_flip_string(port, dbuf->buf + dmataken,
+ pending);
+
+ uap->port.icount.rx += dma_count;
+@@ -930,7 +925,7 @@ static void pl011_dma_rx_chars(struct ua
+
+ /* Reset the last_residue for Rx DMA poll */
+ if (uap->dmarx.poll_rate)
+- dmarx->last_residue = sgbuf->sg.length;
++ dmarx->last_residue = dbuf->len;
+
+ /*
+ * Only continue with trying to read the FIFO if all DMA chars have
+@@ -967,8 +962,8 @@ static void pl011_dma_rx_irq(struct uart
+ {
+ struct pl011_dmarx_data *dmarx = &uap->dmarx;
+ struct dma_chan *rxchan = dmarx->chan;
+- struct pl011_sgbuf *sgbuf = dmarx->use_buf_b ?
+- &dmarx->sgbuf_b : &dmarx->sgbuf_a;
++ struct pl011_dmabuf *dbuf = dmarx->use_buf_b ?
++ &dmarx->dbuf_b : &dmarx->dbuf_a;
+ size_t pending;
+ struct dma_tx_state state;
+ enum dma_status dmastat;
+@@ -990,7 +985,7 @@ static void pl011_dma_rx_irq(struct uart
+ pl011_write(uap->dmacr, uap, REG_DMACR);
+ uap->dmarx.running = false;
+
+- pending = sgbuf->sg.length - state.residue;
++ pending = dbuf->len - state.residue;
+ BUG_ON(pending > PL011_DMA_BUFFER_SIZE);
+ /* Then we terminate the transfer - we now know our residue */
+ dmaengine_terminate_all(rxchan);
+@@ -1017,8 +1012,8 @@ static void pl011_dma_rx_callback(void *
+ struct pl011_dmarx_data *dmarx = &uap->dmarx;
+ struct dma_chan *rxchan = dmarx->chan;
+ bool lastbuf = dmarx->use_buf_b;
+- struct pl011_sgbuf *sgbuf = dmarx->use_buf_b ?
+- &dmarx->sgbuf_b : &dmarx->sgbuf_a;
++ struct pl011_dmabuf *dbuf = dmarx->use_buf_b ?
++ &dmarx->dbuf_b : &dmarx->dbuf_a;
+ size_t pending;
+ struct dma_tx_state state;
+ int ret;
+@@ -1036,7 +1031,7 @@ static void pl011_dma_rx_callback(void *
+ * the DMA irq handler. So we check the residue here.
+ */
+ rxchan->device->device_tx_status(rxchan, dmarx->cookie, &state);
+- pending = sgbuf->sg.length - state.residue;
++ pending = dbuf->len - state.residue;
+ BUG_ON(pending > PL011_DMA_BUFFER_SIZE);
+ /* Then we terminate the transfer - we now know our residue */
+ dmaengine_terminate_all(rxchan);
+@@ -1088,16 +1083,16 @@ static void pl011_dma_rx_poll(unsigned l
+ unsigned long flags = 0;
+ unsigned int dmataken = 0;
+ unsigned int size = 0;
+- struct pl011_sgbuf *sgbuf;
++ struct pl011_dmabuf *dbuf;
+ int dma_count;
+ struct dma_tx_state state;
+
+- sgbuf = dmarx->use_buf_b ? &uap->dmarx.sgbuf_b : &uap->dmarx.sgbuf_a;
++ dbuf = dmarx->use_buf_b ? &uap->dmarx.dbuf_b : &uap->dmarx.dbuf_a;
+ rxchan->device->device_tx_status(rxchan, dmarx->cookie, &state);
+ if (likely(state.residue < dmarx->last_residue)) {
+- dmataken = sgbuf->sg.length - dmarx->last_residue;
++ dmataken = dbuf->len - dmarx->last_residue;
+ size = dmarx->last_residue - state.residue;
+- dma_count = tty_insert_flip_string(port, sgbuf->buf + dmataken,
++ dma_count = tty_insert_flip_string(port, dbuf->buf + dmataken,
+ size);
+ if (dma_count == size)
+ dmarx->last_residue = state.residue;
+@@ -1144,7 +1139,7 @@ static void pl011_dma_startup(struct uar
+ return;
+ }
+
+- sg_init_one(&uap->dmatx.sg, uap->dmatx.buf, PL011_DMA_BUFFER_SIZE);
++ uap->dmatx.len = PL011_DMA_BUFFER_SIZE;
+
+ /* The DMA buffer is now the FIFO the TTY subsystem can use */
+ uap->port.fifosize = PL011_DMA_BUFFER_SIZE;
+@@ -1154,7 +1149,7 @@ static void pl011_dma_startup(struct uar
+ goto skip_rx;
+
+ /* Allocate and map DMA RX buffers */
+- ret = pl011_sgbuf_init(uap->dmarx.chan, &uap->dmarx.sgbuf_a,
++ ret = pl011_dmabuf_init(uap->dmarx.chan, &uap->dmarx.dbuf_a,
+ DMA_FROM_DEVICE);
+ if (ret) {
+ dev_err(uap->port.dev, "failed to init DMA %s: %d\n",
+@@ -1162,12 +1157,12 @@ static void pl011_dma_startup(struct uar
+ goto skip_rx;
+ }
+
+- ret = pl011_sgbuf_init(uap->dmarx.chan, &uap->dmarx.sgbuf_b,
++ ret = pl011_dmabuf_init(uap->dmarx.chan, &uap->dmarx.dbuf_b,
+ DMA_FROM_DEVICE);
+ if (ret) {
+ dev_err(uap->port.dev, "failed to init DMA %s: %d\n",
+ "RX buffer B", ret);
+- pl011_sgbuf_free(uap->dmarx.chan, &uap->dmarx.sgbuf_a,
++ pl011_dmabuf_free(uap->dmarx.chan, &uap->dmarx.dbuf_a,
+ DMA_FROM_DEVICE);
+ goto skip_rx;
+ }
+@@ -1223,8 +1218,9 @@ static void pl011_dma_shutdown(struct ua
+ /* In theory, this should already be done by pl011_dma_flush_buffer */
+ dmaengine_terminate_all(uap->dmatx.chan);
+ if (uap->dmatx.queued) {
+- dma_unmap_sg(uap->dmatx.chan->device->dev, &uap->dmatx.sg, 1,
+- DMA_TO_DEVICE);
++ dma_unmap_single(uap->dmatx.chan->device->dev,
++ uap->dmatx.dma, uap->dmatx.len,
++ DMA_TO_DEVICE);
+ uap->dmatx.queued = false;
+ }
+
+@@ -1235,8 +1231,8 @@ static void pl011_dma_shutdown(struct ua
+ if (uap->using_rx_dma) {
+ dmaengine_terminate_all(uap->dmarx.chan);
+ /* Clean up the RX DMA */
+- pl011_sgbuf_free(uap->dmarx.chan, &uap->dmarx.sgbuf_a, DMA_FROM_DEVICE);
+- pl011_sgbuf_free(uap->dmarx.chan, &uap->dmarx.sgbuf_b, DMA_FROM_DEVICE);
++ pl011_dmabuf_free(uap->dmarx.chan, &uap->dmarx.dbuf_a, DMA_FROM_DEVICE);
++ pl011_dmabuf_free(uap->dmarx.chan, &uap->dmarx.dbuf_b, DMA_FROM_DEVICE);
+ if (uap->dmarx.poll_rate)
+ del_timer_sync(&uap->dmarx.timer);
+ uap->using_rx_dma = false;
--- /dev/null
+From 1a031f6edc460e9562098bdedc3918da07c30a6e Mon Sep 17 00:00:00 2001
+From: Cameron Williams <cang1@live.co.uk>
+Date: Thu, 2 Nov 2023 21:10:40 +0000
+Subject: parport: Add support for Brainboxes IX/UC/PX parallel cards
+
+From: Cameron Williams <cang1@live.co.uk>
+
+commit 1a031f6edc460e9562098bdedc3918da07c30a6e upstream.
+
+Adds support for Intashield IX-500/IX-550, UC-146/UC-157, PX-146/PX-157,
+PX-203 and PX-475 (LPT port)
+
+Cc: stable@vger.kernel.org
+Signed-off-by: Cameron Williams <cang1@live.co.uk>
+Acked-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
+Link: https://lore.kernel.org/r/AS4PR02MB790389C130410BD864C8DCC9C4A6A@AS4PR02MB7903.eurprd02.prod.outlook.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/parport/parport_pc.c | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+--- a/drivers/parport/parport_pc.c
++++ b/drivers/parport/parport_pc.c
+@@ -2647,6 +2647,8 @@ enum parport_pc_pci_cards {
+ netmos_9865,
+ quatech_sppxp100,
+ wch_ch382l,
++ brainboxes_uc146,
++ brainboxes_px203,
+ };
+
+
+@@ -2710,6 +2712,8 @@ static struct parport_pc_pci {
+ /* netmos_9865 */ { 1, { { 0, -1 }, } },
+ /* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
+ /* wch_ch382l */ { 1, { { 2, -1 }, } },
++ /* brainboxes_uc146 */ { 1, { { 3, -1 }, } },
++ /* brainboxes_px203 */ { 1, { { 0, -1 }, } },
+ };
+
+ static const struct pci_device_id parport_pc_pci_tbl[] = {
+@@ -2801,6 +2805,23 @@ static const struct pci_device_id parpor
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
+ /* WCH CH382L PCI-E single parallel port card */
+ { 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382l },
++ /* Brainboxes IX-500/550 */
++ { PCI_VENDOR_ID_INTASHIELD, 0x402a,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
++ /* Brainboxes UC-146/UC-157 */
++ { PCI_VENDOR_ID_INTASHIELD, 0x0be1,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_uc146 },
++ { PCI_VENDOR_ID_INTASHIELD, 0x0be2,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_uc146 },
++ /* Brainboxes PX-146/PX-257 */
++ { PCI_VENDOR_ID_INTASHIELD, 0x401c,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
++ /* Brainboxes PX-203 */
++ { PCI_VENDOR_ID_INTASHIELD, 0x4007,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_px203 },
++ /* Brainboxes PX-475 */
++ { PCI_VENDOR_ID_INTASHIELD, 0x401f,
++ PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
+ { 0, } /* terminate list */
+ };
+ MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
projects / thirdparty / kernel / stable-queue.git / commitdiff
