/* Copyright (C) 2005-2006 by Texas Instruments */ #ifndef _CPPI_DMA_H_ #define _CPPI_DMA_H_ #include #include #include #include #include #include "musb_core.h" #include "musb_dma.h" /* CPPI RX/TX state RAM */ struct cppi_tx_stateram { u32 tx_head; /* "DMA packet" head descriptor */ u32 tx_buf; u32 tx_current; /* current descriptor */ u32 tx_buf_current; u32 tx_info; /* flags, remaining buflen */ u32 tx_rem_len; u32 tx_dummy; /* unused */ u32 tx_complete; }; struct cppi_rx_stateram { u32 rx_skipbytes; u32 rx_head; u32 rx_sop; /* "DMA packet" head descriptor */ u32 rx_current; /* current descriptor */ u32 rx_buf_current; u32 rx_len_len; u32 rx_cnt_cnt; u32 rx_complete; }; /* hw_options bits in CPPI buffer descriptors */ #define CPPI_SOP_SET ((u32)(1 << 31)) #define CPPI_EOP_SET ((u32)(1 << 30)) #define CPPI_OWN_SET ((u32)(1 << 29)) /* owned by cppi */ #define CPPI_EOQ_MASK ((u32)(1 << 28)) #define CPPI_ZERO_SET ((u32)(1 << 23)) /* rx saw zlp; tx issues one */ #define CPPI_RXABT_MASK ((u32)(1 << 19)) /* need more rx buffers */ #define CPPI_RECV_PKTLEN_MASK 0xFFFF #define CPPI_BUFFER_LEN_MASK 0xFFFF #define CPPI_TEAR_READY ((u32)(1 << 31)) /* CPPI data structure definitions */ #define CPPI_DESCRIPTOR_ALIGN 16 /* bytes; 5-dec docs say 4-byte align */ struct cppi_descriptor { /* hardware overlay */ u32 hw_next; /* next buffer descriptor Pointer */ u32 hw_bufp; /* i/o buffer pointer */ u32 hw_off_len; /* buffer_offset16, buffer_length16 */ u32 hw_options; /* flags: SOP, EOP etc*/ struct cppi_descriptor *next; dma_addr_t dma; /* address of this descriptor */ u32 buflen; /* for RX: original buffer length */ } __attribute__ ((aligned(CPPI_DESCRIPTOR_ALIGN))); struct cppi; /* CPPI Channel Control structure */ struct cppi_channel { struct dma_channel channel; /* back pointer to the DMA controller structure */ struct cppi *controller; /* which direction of which endpoint? */ struct musb_hw_ep *hw_ep; bool transmit; u8 index; /* DMA modes: RNDIS or "transparent" */ u8 is_rndis; /* book keeping for current transfer request */ dma_addr_t buf_dma; u32 buf_len; u32 maxpacket; u32 offset; /* dma requested */ void __iomem *state_ram; /* CPPI state */ struct cppi_descriptor *freelist; /* BD management fields */ struct cppi_descriptor *head; struct cppi_descriptor *tail; struct cppi_descriptor *last_processed; /* use tx_complete in host role to track endpoints waiting for * FIFONOTEMPTY to clear. */ struct list_head tx_complete; }; /* CPPI DMA controller object */ struct cppi { struct dma_controller controller; struct musb *musb; void __iomem *mregs; /* Mentor regs */ void __iomem *tibase; /* TI/CPPI regs */ int irq; struct cppi_channel tx[4]; struct cppi_channel rx[4]; struct dma_pool *pool; struct list_head tx_complete; }; /* CPPI IRQ handler */ extern irqreturn_t cppi_interrupt(int, void *); struct cppi41_dma_channel { struct dma_channel channel; struct cppi41_dma_controller *controller; struct musb_hw_ep *hw_ep; struct dma_chan *dc; dma_cookie_t cookie; u8 port_num; u8 is_tx; u8 is_allocated; u8 usb_toggle; dma_addr_t buf_addr; u32 total_len; u32 prog_len; u32 transferred; u32 packet_sz; struct list_head tx_check; int tx_zlp; }; #endif /* end of ifndef _CPPI_DMA_H_ */ 26f'>Makefile
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authorJiri Kosina <jkosina@suse.cz>2017-01-27 22:25:52 +0000
committerIngo Molnar <mingo@kernel.org>2017-01-28 09:18:56 +0100
commitbf29bddf0417a4783da3b24e8c9e017ac649326f (patch)
tree54a05a4883b73f80e4e1d8c4b15750aa01c39932 /sound/drivers/Makefile
parent883af14e67e8b8702b5560aa64c888c0cd0bd66c (diff)
x86/efi: Always map the first physical page into the EFI pagetables
Commit: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") stopped creating 1:1 mappings for all RAM, when running in native 64-bit mode. It turns out though that there are 64-bit EFI implementations in the wild (this particular problem has been reported on a Lenovo Yoga 710-11IKB), which still make use of the first physical page for their own private use, even though they explicitly mark it EFI_CONVENTIONAL_MEMORY in the memory map. In case there is no mapping for this particular frame in the EFI pagetables, as soon as firmware tries to make use of it, a triple fault occurs and the system reboots (in case of the Yoga 710-11IKB this is very early during bootup). Fix that by always mapping the first page of physical memory into the EFI pagetables. We're free to hand this page to the BIOS, as trim_bios_range() will reserve the first page and isolate it away from memory allocators anyway. Note that just reverting 129766708 alone is not enough on v4.9-rc1+ to fix the regression on affected hardware, as this commit: ab72a27da ("x86/efi: Consolidate region mapping logic") later made the first physical frame not to be mapped anyway. Reported-by: Hanka Pavlikova <hanka@ucw.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Laura Abbott <labbott@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vojtech Pavlik <vojtech@ucw.cz> Cc: Waiman Long <waiman.long@hpe.com> Cc: linux-efi@vger.kernel.org Cc: stable@kernel.org # v4.8+ Fixes: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") Link: http://lkml.kernel.org/r/20170127222552.22336-1-matt@codeblueprint.co.uk [ Tidied up the changelog and the comment. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'sound/drivers/Makefile')