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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
286 lines
8.3 KiB
C
286 lines
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for the NXP SAA7164 PCIe bridge
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*
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* Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
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*/
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#include <linux/slab.h>
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#include "saa7164.h"
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/* The PCI address space for buffer handling looks like this:
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*
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* +-u32 wide-------------+
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* | +
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* +-u64 wide------------------------------------+
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* + +
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* +----------------------+
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* | CurrentBufferPtr + Pointer to current PCI buffer >-+
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* +----------------------+ |
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* | Unused + |
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* +----------------------+ |
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* | Pitch + = 188 (bytes) |
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* +----------------------+ |
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* | PCI buffer size + = pitch * number of lines (312) |
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* +----------------------+ |
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* |0| Buf0 Write Offset + |
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* +----------------------+ v
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* |1| Buf1 Write Offset + |
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* +----------------------+ |
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* |2| Buf2 Write Offset + |
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* +----------------------+ |
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* |3| Buf3 Write Offset + |
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* +----------------------+ |
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* ... More write offsets |
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* +---------------------------------------------+ |
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* +0| set of ptrs to PCI pagetables + |
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* +---------------------------------------------+ |
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* +1| set of ptrs to PCI pagetables + <--------+
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* +---------------------------------------------+
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* +2| set of ptrs to PCI pagetables +
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* +---------------------------------------------+
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* +3| set of ptrs to PCI pagetables + >--+
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* +---------------------------------------------+ |
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* ... More buffer pointers | +----------------+
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* +->| pt[0] TS data |
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* | +----------------+
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* |
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* | +----------------+
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* +->| pt[1] TS data |
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* | +----------------+
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* | etc
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*/
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/* Allocate a new buffer structure and associated PCI space in bytes.
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* len must be a multiple of sizeof(u64)
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*/
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struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_port *port,
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u32 len)
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{
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struct tmHWStreamParameters *params = &port->hw_streamingparams;
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struct saa7164_buffer *buf = NULL;
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struct saa7164_dev *dev = port->dev;
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int i;
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if ((len == 0) || (len >= 65536) || (len % sizeof(u64))) {
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log_warn("%s() SAA_ERR_BAD_PARAMETER\n", __func__);
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goto ret;
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}
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buf = kzalloc_obj(*buf);
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if (!buf)
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goto ret;
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buf->idx = -1;
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buf->port = port;
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buf->flags = SAA7164_BUFFER_FREE;
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buf->pos = 0;
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buf->actual_size = params->pitch * params->numberoflines;
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buf->crc = 0;
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/* TODO: arg len is being ignored */
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buf->pci_size = SAA7164_PT_ENTRIES * 0x1000;
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buf->pt_size = (SAA7164_PT_ENTRIES * sizeof(u64)) + 0x1000;
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/* Allocate contiguous memory */
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buf->cpu = dma_alloc_coherent(&port->dev->pci->dev, buf->pci_size,
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&buf->dma, GFP_KERNEL);
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if (!buf->cpu)
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goto fail1;
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buf->pt_cpu = dma_alloc_coherent(&port->dev->pci->dev, buf->pt_size,
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&buf->pt_dma, GFP_KERNEL);
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if (!buf->pt_cpu)
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goto fail2;
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/* init the buffers to a known pattern, easier during debugging */
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memset(buf->cpu, 0xff, buf->pci_size);
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buf->crc = crc32(0, buf->cpu, buf->actual_size);
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memset(buf->pt_cpu, 0xff, buf->pt_size);
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dprintk(DBGLVL_BUF, "%s() allocated buffer @ 0x%p (%d pageptrs)\n",
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__func__, buf, params->numpagetables);
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dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%08lx len = 0x%x\n",
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buf->cpu, (long)buf->dma, buf->pci_size);
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dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%08lx len = 0x%x\n",
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buf->pt_cpu, (long)buf->pt_dma, buf->pt_size);
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/* Format the Page Table Entries to point into the data buffer */
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for (i = 0 ; i < params->numpagetables; i++) {
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*(buf->pt_cpu + i) = buf->dma + (i * 0x1000); /* TODO */
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dprintk(DBGLVL_BUF, " pt[%02d] = 0x%p -> 0x%llx\n",
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i, buf->pt_cpu, (u64)*(buf->pt_cpu));
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}
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goto ret;
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fail2:
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dma_free_coherent(&port->dev->pci->dev, buf->pci_size, buf->cpu,
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buf->dma);
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fail1:
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kfree(buf);
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buf = NULL;
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ret:
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return buf;
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}
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int saa7164_buffer_dealloc(struct saa7164_buffer *buf)
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{
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struct saa7164_dev *dev;
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if (!buf || !buf->port)
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return SAA_ERR_BAD_PARAMETER;
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dev = buf->port->dev;
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dprintk(DBGLVL_BUF, "%s() deallocating buffer @ 0x%p\n",
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__func__, buf);
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if (buf->flags != SAA7164_BUFFER_FREE)
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log_warn(" freeing a non-free buffer\n");
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dma_free_coherent(&dev->pci->dev, buf->pci_size, buf->cpu, buf->dma);
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dma_free_coherent(&dev->pci->dev, buf->pt_size, buf->pt_cpu,
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buf->pt_dma);
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kfree(buf);
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return SAA_OK;
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}
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int saa7164_buffer_zero_offsets(struct saa7164_port *port, int i)
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{
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struct saa7164_dev *dev = port->dev;
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if ((i < 0) || (i >= port->hwcfg.buffercount))
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return -EINVAL;
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dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);
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saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
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return 0;
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}
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/* Write a buffer into the hardware */
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int saa7164_buffer_activate(struct saa7164_buffer *buf, int i)
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{
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struct saa7164_port *port = buf->port;
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struct saa7164_dev *dev = port->dev;
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if ((i < 0) || (i >= port->hwcfg.buffercount))
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return -EINVAL;
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dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);
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buf->idx = i; /* Note of which buffer list index position we occupy */
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buf->flags = SAA7164_BUFFER_BUSY;
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buf->pos = 0;
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/* TODO: Review this in light of 32v64 assignments */
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saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
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saa7164_writel(port->bufptr32h + ((sizeof(u32) * 2) * i), buf->pt_dma);
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saa7164_writel(port->bufptr32l + ((sizeof(u32) * 2) * i), 0);
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dprintk(DBGLVL_BUF, " buf[%d] offset 0x%llx (0x%x) buf 0x%llx/%llx (0x%x/%x) nr=%d\n",
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buf->idx,
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(u64)port->bufoffset + (i * sizeof(u32)),
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saa7164_readl(port->bufoffset + (sizeof(u32) * i)),
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(u64)port->bufptr32h + ((sizeof(u32) * 2) * i),
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(u64)port->bufptr32l + ((sizeof(u32) * 2) * i),
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saa7164_readl(port->bufptr32h + ((sizeof(u32) * i) * 2)),
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saa7164_readl(port->bufptr32l + ((sizeof(u32) * i) * 2)),
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buf->idx);
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return 0;
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}
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int saa7164_buffer_cfg_port(struct saa7164_port *port)
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{
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struct tmHWStreamParameters *params = &port->hw_streamingparams;
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struct saa7164_dev *dev = port->dev;
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struct saa7164_buffer *buf;
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struct list_head *c, *n;
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int i = 0;
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dprintk(DBGLVL_BUF, "%s(port=%d)\n", __func__, port->nr);
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saa7164_writel(port->bufcounter, 0);
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saa7164_writel(port->pitch, params->pitch);
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saa7164_writel(port->bufsize, params->pitch * params->numberoflines);
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dprintk(DBGLVL_BUF, " configured:\n");
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dprintk(DBGLVL_BUF, " lmmio 0x%p\n", dev->lmmio);
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dprintk(DBGLVL_BUF, " bufcounter 0x%x = 0x%x\n", port->bufcounter,
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saa7164_readl(port->bufcounter));
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dprintk(DBGLVL_BUF, " pitch 0x%x = %d\n", port->pitch,
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saa7164_readl(port->pitch));
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dprintk(DBGLVL_BUF, " bufsize 0x%x = %d\n", port->bufsize,
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saa7164_readl(port->bufsize));
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dprintk(DBGLVL_BUF, " buffercount = %d\n", port->hwcfg.buffercount);
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dprintk(DBGLVL_BUF, " bufoffset = 0x%x\n", port->bufoffset);
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dprintk(DBGLVL_BUF, " bufptr32h = 0x%x\n", port->bufptr32h);
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dprintk(DBGLVL_BUF, " bufptr32l = 0x%x\n", port->bufptr32l);
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/* Poke the buffers and offsets into PCI space */
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mutex_lock(&port->dmaqueue_lock);
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list_for_each_safe(c, n, &port->dmaqueue.list) {
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buf = list_entry(c, struct saa7164_buffer, list);
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BUG_ON(buf->flags != SAA7164_BUFFER_FREE);
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/* Place the buffer in the h/w queue */
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saa7164_buffer_activate(buf, i);
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/* Don't exceed the device maximum # bufs */
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BUG_ON(i > port->hwcfg.buffercount);
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i++;
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}
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mutex_unlock(&port->dmaqueue_lock);
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return 0;
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}
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struct saa7164_user_buffer *saa7164_buffer_alloc_user(struct saa7164_dev *dev,
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u32 len)
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{
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struct saa7164_user_buffer *buf;
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buf = kzalloc_obj(*buf);
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if (!buf)
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return NULL;
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buf->data = kzalloc(len, GFP_KERNEL);
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if (!buf->data) {
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kfree(buf);
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return NULL;
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}
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buf->actual_size = len;
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buf->pos = 0;
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buf->crc = 0;
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dprintk(DBGLVL_BUF, "%s() allocated user buffer @ 0x%p\n",
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__func__, buf);
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return buf;
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}
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void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf)
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{
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if (!buf)
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return;
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kfree(buf->data);
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buf->data = NULL;
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kfree(buf);
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}
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