/* * oxfw_command.c - a part of driver for OXFW970/971 based devices * * Copyright (c) 2014 Takashi Sakamoto * * Licensed under the terms of the GNU General Public License, version 2. */ #include "oxfw.h" int avc_stream_set_format(struct fw_unit *unit, enum avc_general_plug_dir dir, unsigned int pid, u8 *format, unsigned int len) { u8 *buf; int err; buf = kmalloc(len + 10, GFP_KERNEL); if (buf == NULL) return -ENOMEM; buf[0] = 0x00; /* CONTROL */ buf[1] = 0xff; /* UNIT */ buf[2] = 0xbf; /* EXTENDED STREAM FORMAT INFORMATION */ buf[3] = 0xc0; /* SINGLE subfunction */ buf[4] = dir; /* Plug Direction */ buf[5] = 0x00; /* UNIT */ buf[6] = 0x00; /* PCR (Isochronous Plug) */ buf[7] = 0xff & pid; /* Plug ID */ buf[8] = 0xff; /* Padding */ buf[9] = 0xff; /* Support status in response */ memcpy(buf + 10, format, len); /* do transaction and check buf[1-8] are the same against command */ err = fcp_avc_transaction(unit, buf, len + 10, buf, len + 10, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8)); if ((err > 0) && (err < len + 10)) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; else if (buf[0] == 0x0a) /* REJECTED */ err = -EINVAL; else err = 0; kfree(buf); return err; } int avc_stream_get_format(struct fw_unit *unit, enum avc_general_plug_dir dir, unsigned int pid, u8 *buf, unsigned int *len, unsigned int eid) { unsigned int subfunc; int err; if (eid == 0xff) subfunc = 0xc0; /* SINGLE */ else subfunc = 0xc1; /* LIST */ buf[0] = 0x01; /* STATUS */ buf[1] = 0xff; /* UNIT */ buf[2] = 0xbf; /* EXTENDED STREAM FORMAT INFORMATION */ buf[3] = subfunc; /* SINGLE or LIST */ buf[4] = dir; /* Plug Direction */ buf[5] = 0x00; /* Unit */ buf[6] = 0x00; /* PCR (Isochronous Plug) */ buf[7] = 0xff & pid; /* Plug ID */ buf[8] = 0xff; /* Padding */ buf[9] = 0xff; /* support status in response */ buf[10] = 0xff & eid; /* entry ID for LIST subfunction */ buf[11] = 0xff; /* padding */ /* do transaction and check buf[1-7] are the same against command */ err = fcp_avc_transaction(unit, buf, 12, buf, *len, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7)); if ((err > 0) && (err < 10)) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; else if (buf[0] == 0x0a) /* REJECTED */ err = -EINVAL; else if (buf[0] == 0x0b) /* IN TRANSITION */ err = -EAGAIN; /* LIST subfunction has entry ID */ else if ((subfunc == 0xc1) && (buf[10] != eid)) err = -EIO; if (err < 0) goto end; /* keep just stream format information */ if (subfunc == 0xc0) { memmove(buf, buf + 10, err - 10); *len = err - 10; } else { memmove(buf, buf + 11, err - 11); *len = err - 11; } err = 0; end: return err; } int avc_general_inquiry_sig_fmt(struct fw_unit *unit, unsigned int rate, enum avc_general_plug_dir dir, unsigned short pid) { unsigned int sfc; u8 *buf; int err; for (sfc = 0; sfc < CIP_SFC_COUNT; sfc++) { if (amdtp_rate_table[sfc] == rate) break; } if (sfc == CIP_SFC_COUNT) return -EINVAL; buf = kzalloc(8, GFP_KERNEL); if (buf == NULL) return -ENOMEM; buf[0] = 0x02; /* SPECIFIC INQUIRY */ buf[1] = 0xff; /* UNIT */ if (dir == AVC_GENERAL_PLUG_DIR_IN) buf[2] = 0x19; /* INPUT PLUG SIGNAL FORMAT */ else buf[2] = 0x18; /* OUTPUT PLUG SIGNAL FORMAT */ buf[3] = 0xff & pid; /* plug id */ buf[4] = 0x90; /* EOH_1, Form_1, FMT. AM824 */ buf[5] = 0x07 & sfc; /* FDF-hi. AM824, frequency */ buf[6] = 0xff; /* FDF-mid. AM824, SYT hi (not used) */ buf[7] = 0xff; /* FDF-low. AM824, SYT lo (not used) */ /* do transaction and check buf[1-5] are the same against command */ err = fcp_avc_transaction(unit, buf, 8, buf, 8, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5)); if ((err > 0) && (err < 8)) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; if (err < 0) goto end; err = 0; end: kfree(buf); return err; } value='9'>9space:mode:
authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /tools/vm/slabinfo.c
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/vm/slabinfo.c')