/* * controlfb_hw.h: Constants of all sorts for controlfb * * Copyright (C) 1998 Daniel Jacobowitz * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * Based on an awful lot of code, including: * * control.c: Console support for PowerMac "control" display adaptor. * Copyright (C) 1996 Paul Mackerras. * * The so far unpublished platinumfb.c * Copyright (C) 1998 Jon Howell */ /* * Structure of the registers for the RADACAL colormap device. */ struct cmap_regs { unsigned char addr; /* index for both cmap and misc registers */ char pad1[15]; unsigned char crsr; /* cursor palette */ char pad2[15]; unsigned char dat; /* RADACAL misc register data */ char pad3[15]; unsigned char lut; /* cmap data */ char pad4[15]; }; /* * Structure of the registers for the "control" display adaptor. */ #define PAD(x) char x[12] struct preg { /* padded register */ unsigned r; char pad[12]; }; struct control_regs { struct preg vcount; /* vertical counter */ /* Vertical parameters are in units of 1/2 scan line */ struct preg vswin; /* between vsblank and vssync */ struct preg vsblank; /* vert start blank */ struct preg veblank; /* vert end blank (display start) */ struct preg vewin; /* between vesync and veblank */ struct preg vesync; /* vert end sync */ struct preg vssync; /* vert start sync */ struct preg vperiod; /* vert period */ struct preg piped; /* pipe delay hardware cursor */ /* Horizontal params are in units of 2 pixels */ struct preg hperiod; /* horiz period - 2 */ struct preg hsblank; /* horiz start blank */ struct preg heblank; /* horiz end blank */ struct preg hesync; /* horiz end sync */ struct preg hssync; /* horiz start sync */ struct preg heq; /* half horiz sync len */ struct preg hlfln; /* half horiz period */ struct preg hserr; /* horiz period - horiz sync len */ struct preg cnttst; struct preg ctrl; /* display control */ struct preg start_addr; /* start address: 5 lsbs zero */ struct preg pitch; /* addrs diff between scan lines */ struct preg mon_sense; /* monitor sense bits */ struct preg vram_attr; /* enable vram banks */ struct preg mode; struct preg rfrcnt; /* refresh count */ struct preg intr_ena; /* interrupt enable */ struct preg intr_stat; /* interrupt status */ struct preg res[5]; }; struct control_regints { /* Vertical parameters are in units of 1/2 scan line */ unsigned vswin; /* between vsblank and vssync */ unsigned vsblank; /* vert start blank */ unsigned veblank; /* vert end blank (display start) */ unsigned vewin; /* between vesync and veblank */ unsigned vesync; /* vert end sync */ unsigned vssync; /* vert start sync */ unsigned vperiod; /* vert period */ unsigned piped; /* pipe delay hardware cursor */ /* Horizontal params are in units of 2 pixels */ /* Except, apparently, for hres > 1024 (or == 1280?) */ unsigned hperiod; /* horiz period - 2 */ unsigned hsblank; /* horiz start blank */ unsigned heblank; /* horiz end blank */ unsigned hesync; /* horiz end sync */ unsigned hssync; /* horiz start sync */ unsigned heq; /* half horiz sync len */ unsigned hlfln; /* half horiz period */ unsigned hserr; /* horiz period - horiz sync len */ }; /* * Dot clock rate is * 3.9064MHz * 2**clock_params[2] * clock_params[1] / clock_params[0]. */ struct control_regvals { unsigned regs[16]; /* for vswin .. hserr */ unsigned char mode; unsigned char radacal_ctrl; unsigned char clock_params[3]; }; #define CTRLFB_OFF 16 /* position of pixel 0 in frame buffer */ /* * Best cmode supported by control */ struct max_cmodes { int m[2]; /* 0: 2MB vram, 1: 4MB vram */ }; /* * Video modes supported by macmodes.c */ static struct max_cmodes control_mac_modes[] = { {{-1,-1}}, /* 512x384, 60Hz interlaced (NTSC) */ {{-1,-1}}, /* 512x384, 60Hz */ {{-1,-1}}, /* 640x480, 50Hz interlaced (PAL) */ {{-1,-1}}, /* 640x480, 60Hz interlaced (NTSC) */ {{ 2, 2}}, /* 640x480, 60Hz (VGA) */ {{ 2, 2}}, /* 640x480, 67Hz */ {{-1,-1}}, /* 640x870, 75Hz (portrait) */ {{-1,-1}}, /* 768x576, 50Hz (PAL full frame) */ {{ 2, 2}}, /* 800x600, 56Hz */ {{ 2, 2}}, /* 800x600, 60Hz */ {{ 2, 2}}, /* 800x600, 72Hz */ {{ 2, 2}}, /* 800x600, 75Hz */ {{ 1, 2}}, /* 832x624, 75Hz */ {{ 1, 2}}, /* 1024x768, 60Hz */ {{ 1, 2}}, /* 1024x768, 70Hz (or 72Hz?) */ {{ 1, 2}}, /* 1024x768, 75Hz (VESA) */ {{ 1, 2}}, /* 1024x768, 75Hz */ {{ 1, 2}}, /* 1152x870, 75Hz */ {{ 0, 1}}, /* 1280x960, 75Hz */ {{ 0, 1}}, /* 1280x1024, 75Hz */ }; e:
authorIago Abal <mail@iagoabal.eu>2017-01-11 14:00:21 +0100
committerVinod Koul <vinod.koul@intel.com>2017-01-25 15:35:11 +0530
commit91539eb1fda2d530d3b268eef542c5414e54bf1a (patch)
tree960f5ca6342ad20837aff18aad6e8ecd7da32fd6 /tools/perf/arch/powerpc/util/book3s_hcalls.h
parent6610d0edf6dc7ee97e46ab3a538a565c79d26199 (diff)
dmaengine: pl330: fix double lock
The static bug finder EBA (http://www.iagoabal.eu/eba/) reported the following double-lock bug: Double lock: 1. spin_lock_irqsave(pch->lock, flags) at pl330_free_chan_resources:2236; 2. call to function `pl330_release_channel' immediately after; 3. call to function `dma_pl330_rqcb' in line 1753; 4. spin_lock_irqsave(pch->lock, flags) at dma_pl330_rqcb:1505. I have fixed it as suggested by Marek Szyprowski. First, I have replaced `pch->lock' with `pl330->lock' in functions `pl330_alloc_chan_resources' and `pl330_free_chan_resources'. This avoids the double-lock by acquiring a different lock than `dma_pl330_rqcb'. NOTE that, as a result, `pl330_free_chan_resources' executes `list_splice_tail_init' on `pch->work_list' under lock `pl330->lock', whereas in the rest of the code `pch->work_list' is protected by `pch->lock'. I don't know if this may cause race conditions. Similarly `pch->cyclic' is written by `pl330_alloc_chan_resources' under `pl330->lock' but read by `pl330_tx_submit' under `pch->lock'. Second, I have removed locking from `pl330_request_channel' and `pl330_release_channel' functions. Function `pl330_request_channel' is only called from `pl330_alloc_chan_resources', so the lock is already held. Function `pl330_release_channel' is called from `pl330_free_chan_resources', which already holds the lock, and from `pl330_del'. Function `pl330_del' is called in an error path of `pl330_probe' and at the end of `pl330_remove', but I assume that there cannot be concurrent accesses to the protected data at those points. Signed-off-by: Iago Abal <mail@iagoabal.eu> Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'tools/perf/arch/powerpc/util/book3s_hcalls.h')