[SCSI] lpfc 8.3.23: BSG additions and fixes

- Fixed the mixed declarations and codes which violate ISO C90
   (declarations in subsections that assign at declaration)
- Add BSG data transfer size protection in mailbox command pass-through path
- Invoke BSG job_done while holding spinlock to fix deadlock
- Added support for checking SLI_CONFIG subcommands
- Fixed bug in BSG mailbox size check to non-embedded external buffer

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 130 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_bsg.h b/drivers/scsi/lpfc/lpfc_bsg.h
index a2c33e7c915..b542aca6f5a 100644
--- a/drivers/scsi/lpfc/lpfc_bsg.h
+++ b/drivers/scsi/lpfc/lpfc_bsg.h
@@ -109,3 +109,133 @@ struct menlo_response {
 	uint32_t xri; /* return the xri of the iocb exchange */
 };
 
+/*
+ * macros and data structures for handling sli-config mailbox command
+ * pass-through support, this header file is shared between user and
+ * kernel spaces, note the set of macros are duplicates from lpfc_hw4.h,
+ * with macro names prefixed with bsg_, as the macros defined in
+ * lpfc_hw4.h are not accessible from user space.
+ */
+
+/* Macros to deal with bit fields. Each bit field must have 3 #defines
+ * associated with it (_SHIFT, _MASK, and _WORD).
+ * EG. For a bit field that is in the 7th bit of the "field4" field of a
+ * structure and is 2 bits in size the following #defines must exist:
+ *      struct temp {
+ *              uint32_t        field1;
+ *              uint32_t        field2;
+ *              uint32_t        field3;
+ *              uint32_t        field4;
+ *      #define example_bit_field_SHIFT         7
+ *      #define example_bit_field_MASK          0x03
+ *      #define example_bit_field_WORD          field4
+ *              uint32_t        field5;
+ *      };
+ * Then the macros below may be used to get or set the value of that field.
+ * EG. To get the value of the bit field from the above example:
+ *      struct temp t1;
+ *      value = bsg_bf_get(example_bit_field, &t1);
+ * And then to set that bit field:
+ *      bsg_bf_set(example_bit_field, &t1, 2);
+ * Or clear that bit field:
+ *      bsg_bf_set(example_bit_field, &t1, 0);
+ */
+#define bsg_bf_get_le32(name, ptr) \
+	((le32_to_cpu((ptr)->name##_WORD) >> name##_SHIFT) & name##_MASK)
+#define bsg_bf_get(name, ptr) \
+	(((ptr)->name##_WORD >> name##_SHIFT) & name##_MASK)
+#define bsg_bf_set_le32(name, ptr, value) \
+	((ptr)->name##_WORD = cpu_to_le32(((((value) & \
+	name##_MASK) << name##_SHIFT) | (le32_to_cpu((ptr)->name##_WORD) & \
+	~(name##_MASK << name##_SHIFT)))))
+#define bsg_bf_set(name, ptr, value) \
+	((ptr)->name##_WORD = ((((value) & name##_MASK) << name##_SHIFT) | \
+	((ptr)->name##_WORD & ~(name##_MASK << name##_SHIFT))))
+
+/*
+ * The sli_config structure specified here is based on the following
+ * restriction:
+ *
+ * -- SLI_CONFIG EMB=0, carrying MSEs, will carry subcommands without
+ *    carrying HBD.
+ * -- SLI_CONFIG EMB=1, not carrying MSE, will carry subcommands with or
+ *    without carrying HBDs.
+ */
+
+struct lpfc_sli_config_mse {
+	uint32_t pa_lo;
+	uint32_t pa_hi;
+	uint32_t buf_len;
+#define lpfc_mbox_sli_config_mse_len_SHIFT	0
+#define lpfc_mbox_sli_config_mse_len_MASK	0xffffff
+#define lpfc_mbox_sli_config_mse_len_WORD	buf_len
+};
+
+struct lpfc_sli_config_subcmd_hbd {
+	uint32_t buf_len;
+#define lpfc_mbox_sli_config_ecmn_hbd_len_SHIFT	0
+#define lpfc_mbox_sli_config_ecmn_hbd_len_MASK	0xffffff
+#define lpfc_mbox_sli_config_ecmn_hbd_len_WORD	buf_len
+	uint32_t pa_lo;
+	uint32_t pa_hi;
+};
+
+struct lpfc_sli_config_hdr {
+	uint32_t word1;
+#define lpfc_mbox_hdr_emb_SHIFT		0
+#define lpfc_mbox_hdr_emb_MASK		0x00000001
+#define lpfc_mbox_hdr_emb_WORD		word1
+#define lpfc_mbox_hdr_mse_cnt_SHIFT	3
+#define lpfc_mbox_hdr_mse_cnt_MASK	0x0000001f
+#define lpfc_mbox_hdr_mse_cnt_WORD	word1
+	uint32_t payload_length;
+	uint32_t tag_lo;
+	uint32_t tag_hi;
+	uint32_t reserved5;
+};
+
+struct lpfc_sli_config_generic {
+	struct lpfc_sli_config_hdr	sli_config_hdr;
+#define LPFC_MBX_SLI_CONFIG_MAX_MSE     19
+	struct lpfc_sli_config_mse	mse[LPFC_MBX_SLI_CONFIG_MAX_MSE];
+};
+
+struct lpfc_sli_config_subcmnd {
+	struct lpfc_sli_config_hdr	sli_config_hdr;
+	uint32_t word6;
+#define lpfc_subcmnd_opcode_SHIFT	0
+#define lpfc_subcmnd_opcode_MASK	0xff
+#define lpfc_subcmnd_opcode_WORD	word6
+#define lpfc_subcmnd_subsys_SHIFT	8
+#define lpfc_subcmnd_subsys_MASK	0xff
+#define lpfc_subcmnd_subsys_WORD	word6
+	uint32_t timeout;
+	uint32_t request_length;
+	uint32_t word9;
+#define lpfc_subcmnd_version_SHIFT	0
+#define lpfc_subcmnd_version_MASK	0xff
+#define lpfc_subcmnd_version_WORD	word9
+	uint32_t word10;
+#define lpfc_subcmnd_ask_rd_len_SHIFT	0
+#define lpfc_subcmnd_ask_rd_len_MASK	0xffffff
+#define lpfc_subcmnd_ask_rd_len_WORD	word10
+	uint32_t rd_offset;
+	uint32_t obj_name[26];
+	uint32_t hbd_count;
+#define LPFC_MBX_SLI_CONFIG_MAX_HBD	10
+	struct lpfc_sli_config_subcmd_hbd   hbd[LPFC_MBX_SLI_CONFIG_MAX_HBD];
+};
+
+struct lpfc_sli_config_mbox {
+	uint32_t word0;
+#define lpfc_mqe_status_SHIFT		16
+#define lpfc_mqe_status_MASK		0x0000FFFF
+#define lpfc_mqe_status_WORD		word0
+#define lpfc_mqe_command_SHIFT		8
+#define lpfc_mqe_command_MASK		0x000000FF
+#define lpfc_mqe_command_WORD		word0
+	union {
+		struct lpfc_sli_config_generic	sli_config_generic;
+		struct lpfc_sli_config_subcmnd	sli_config_subcmnd;
+	} un;
+};