/*********************************************************************** AudioScience HPI driver Functions for reading DSP code using hotplug firmware loader Copyright (C) 1997-2014 AudioScience Inc. This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation; This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ***********************************************************************/ #define SOURCEFILE_NAME "hpidspcd.c" #include "hpidspcd.h" #include "hpidebug.h" #include "hpi_version.h" struct dsp_code_private { /** Firmware descriptor */ const struct firmware *firmware; struct pci_dev *dev; }; /*-------------------------------------------------------------------*/ short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code, u32 *os_error_code) { const struct firmware *firmware; struct pci_dev *dev = os_data; struct code_header header; char fw_name[20]; short err_ret = HPI_ERROR_DSP_FILE_NOT_FOUND; int err; sprintf(fw_name, "asihpi/dsp%04x.bin", adapter); err = request_firmware(&firmware, fw_name, &dev->dev); if (err || !firmware) { dev_err(&dev->dev, "%d, request_firmware failed for %s\n", err, fw_name); goto error1; } if (firmware->size < sizeof(header)) { dev_err(&dev->dev, "Header size too small %s\n", fw_name); goto error2; } memcpy(&header, firmware->data, sizeof(header)); if ((header.type != 0x45444F43) || /* "CODE" */ (header.adapter != adapter) || (header.size != firmware->size)) { dev_err(&dev->dev, "Invalid firmware header size %d != file %zd\n", header.size, firmware->size); goto error2; } if (HPI_VER_MAJOR(header.version) != HPI_VER_MAJOR(HPI_VER)) { /* Major version change probably means Host-DSP protocol change */ dev_err(&dev->dev, "Incompatible firmware version DSP image %X != Driver %X\n", header.version, HPI_VER); goto error2; } if (header.version != HPI_VER) { dev_warn(&dev->dev, "Firmware version mismatch: DSP image %X != Driver %X\n", header.version, HPI_VER); } HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name); dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL); if (!dsp_code->pvt) { err_ret = HPI_ERROR_MEMORY_ALLOC; goto error2; } dsp_code->pvt->dev = dev; dsp_code->pvt->firmware = firmware; dsp_code->header = header; dsp_code->block_length = header.size / sizeof(u32); dsp_code->word_count = sizeof(header) / sizeof(u32); return 0; error2: release_firmware(firmware); error1: dsp_code->block_length = 0; return err_ret; } /*-------------------------------------------------------------------*/ void hpi_dsp_code_close(struct dsp_code *dsp_code) { HPI_DEBUG_LOG(DEBUG, "dsp code closed\n"); release_firmware(dsp_code->pvt->firmware); kfree(dsp_code->pvt); } /*-------------------------------------------------------------------*/ void hpi_dsp_code_rewind(struct dsp_code *dsp_code) { /* Go back to start of data, after header */ dsp_code->word_count = sizeof(struct code_header) / sizeof(u32); } /*-------------------------------------------------------------------*/ short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword) { if (dsp_code->word_count + 1 > dsp_code->block_length) return HPI_ERROR_DSP_FILE_FORMAT; *pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code-> word_count]; dsp_code->word_count++; return 0; } /*-------------------------------------------------------------------*/ short hpi_dsp_code_read_block(size_t words_requested, struct dsp_code *dsp_code, u32 **ppblock) { if (dsp_code->word_count + words_requested > dsp_code->block_length) return HPI_ERROR_DSP_FILE_FORMAT; *ppblock = ((u32 *)(dsp_code->pvt->firmware->data)) + dsp_code->word_count; dsp_code->word_count += words_requested; return 0; } e='this.form.submit();'>
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /include/soc/imx/timer.h
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/soc/imx/timer.h')