forked from Minki/linux
32be6d3e36
Move the contents of the include/linux/nx842.h header file into the drivers/crypto/nx/nx-842.h header file. Remove the nx842.h header file and its entry in the MAINTAINERS file. The include/linux/nx842.h header originally was there because the crypto/842.c driver needed it to communicate with the nx-842 hw driver. However, that crypto compression driver was moved into the drivers/crypto/nx/ directory, and now can directly include the nx-842.h header. Nothing else needs the public include/linux/nx842.h header file, as all use of the nx-842 hardware driver will be through the "842-nx" crypto compression driver, since the direct nx-842 api is very limited in the buffer alignments and sizes that it will accept, and the crypto compression interface handles those limitations and allows any alignment and size buffers. Signed-off-by: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
147 lines
4.5 KiB
C
147 lines
4.5 KiB
C
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#ifndef __NX_842_H__
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#define __NX_842_H__
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sw842.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/ratelimit.h>
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#define __NX842_PSERIES_MEM_COMPRESS (10240)
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#define __NX842_POWERNV_MEM_COMPRESS (1024)
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#define NX842_MEM_COMPRESS (max_t(unsigned int, \
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__NX842_PSERIES_MEM_COMPRESS, __NX842_POWERNV_MEM_COMPRESS))
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/* Restrictions on Data Descriptor List (DDL) and Entry (DDE) buffers
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*
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* From NX P8 workbook, sec 4.9.1 "842 details"
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* Each DDE buffer is 128 byte aligned
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* Each DDE buffer size is a multiple of 32 bytes (except the last)
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* The last DDE buffer size is a multiple of 8 bytes
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*/
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#define DDE_BUFFER_ALIGN (128)
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#define DDE_BUFFER_SIZE_MULT (32)
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#define DDE_BUFFER_LAST_MULT (8)
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/* Arbitrary DDL length limit
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* Allows max buffer size of MAX-1 to MAX pages
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* (depending on alignment)
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*/
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#define DDL_LEN_MAX (17)
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/* CCW 842 CI/FC masks
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* NX P8 workbook, section 4.3.1, figure 4-6
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* "CI/FC Boundary by NX CT type"
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*/
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#define CCW_CI_842 (0x00003ff8)
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#define CCW_FC_842 (0x00000007)
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/* CCW Function Codes (FC) for 842
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* NX P8 workbook, section 4.9, table 4-28
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* "Function Code Definitions for 842 Memory Compression"
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*/
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#define CCW_FC_842_COMP_NOCRC (0)
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#define CCW_FC_842_COMP_CRC (1)
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#define CCW_FC_842_DECOMP_NOCRC (2)
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#define CCW_FC_842_DECOMP_CRC (3)
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#define CCW_FC_842_MOVE (4)
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/* CSB CC Error Types for 842
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* NX P8 workbook, section 4.10.3, table 4-30
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* "Reported Error Types Summary Table"
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*/
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/* These are all duplicates of existing codes defined in icswx.h. */
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#define CSB_CC_TRANSLATION_DUP1 (80)
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#define CSB_CC_TRANSLATION_DUP2 (82)
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#define CSB_CC_TRANSLATION_DUP3 (84)
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#define CSB_CC_TRANSLATION_DUP4 (86)
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#define CSB_CC_TRANSLATION_DUP5 (92)
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#define CSB_CC_TRANSLATION_DUP6 (94)
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#define CSB_CC_PROTECTION_DUP1 (81)
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#define CSB_CC_PROTECTION_DUP2 (83)
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#define CSB_CC_PROTECTION_DUP3 (85)
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#define CSB_CC_PROTECTION_DUP4 (87)
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#define CSB_CC_PROTECTION_DUP5 (93)
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#define CSB_CC_PROTECTION_DUP6 (95)
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#define CSB_CC_RD_EXTERNAL_DUP1 (89)
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#define CSB_CC_RD_EXTERNAL_DUP2 (90)
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#define CSB_CC_RD_EXTERNAL_DUP3 (91)
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/* These are specific to NX */
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/* 842 codes */
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#define CSB_CC_TPBC_GT_SPBC (64) /* no error, but >1 comp ratio */
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#define CSB_CC_CRC_MISMATCH (65) /* decomp crc mismatch */
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#define CSB_CC_TEMPL_INVALID (66) /* decomp invalid template value */
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#define CSB_CC_TEMPL_OVERFLOW (67) /* decomp template shows data after end */
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/* sym crypt codes */
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#define CSB_CC_DECRYPT_OVERFLOW (64)
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/* asym crypt codes */
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#define CSB_CC_MINV_OVERFLOW (128)
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/* These are reserved for hypervisor use */
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#define CSB_CC_HYP_RESERVE_START (240)
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#define CSB_CC_HYP_RESERVE_END (253)
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#define CSB_CC_HYP_NO_HW (254)
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#define CSB_CC_HYP_HANG_ABORTED (255)
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/* CCB Completion Modes (CM) for 842
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* NX P8 workbook, section 4.3, figure 4-5
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* "CRB Details - Normal Cop_Req (CL=00, C=1)"
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*/
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#define CCB_CM_EXTRA_WRITE (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_STORE)
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#define CCB_CM_INTERRUPT (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_INTERRUPT)
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#define LEN_ON_PAGE(pa) (PAGE_SIZE - ((pa) & ~PAGE_MASK))
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static inline unsigned long nx842_get_pa(void *addr)
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{
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if (!is_vmalloc_addr(addr))
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return __pa(addr);
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return page_to_phys(vmalloc_to_page(addr)) + offset_in_page(addr);
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}
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/* Get/Set bit fields */
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#define MASK_LSH(m) (__builtin_ffsl(m) - 1)
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#define GET_FIELD(v, m) (((v) & (m)) >> MASK_LSH(m))
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#define SET_FIELD(v, m, val) (((v) & ~(m)) | (((val) << MASK_LSH(m)) & (m)))
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struct nx842_constraints {
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int alignment;
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int multiple;
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int minimum;
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int maximum;
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};
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struct nx842_driver {
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char *name;
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struct module *owner;
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struct nx842_constraints *constraints;
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int (*compress)(const unsigned char *in, unsigned int in_len,
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unsigned char *out, unsigned int *out_len,
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void *wrkmem);
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int (*decompress)(const unsigned char *in, unsigned int in_len,
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unsigned char *out, unsigned int *out_len,
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void *wrkmem);
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};
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struct nx842_driver *nx842_platform_driver(void);
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bool nx842_platform_driver_set(struct nx842_driver *driver);
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void nx842_platform_driver_unset(struct nx842_driver *driver);
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bool nx842_platform_driver_get(void);
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void nx842_platform_driver_put(void);
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int nx842_constraints(struct nx842_constraints *constraints);
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int nx842_compress(const unsigned char *in, unsigned int in_len,
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unsigned char *out, unsigned int *out_len, void *wrkmem);
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int nx842_decompress(const unsigned char *in, unsigned int in_len,
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unsigned char *out, unsigned int *out_len, void *wrkmem);
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#endif /* __NX_842_H__ */
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