Intro chords +

G /// /// D - Em /// //  F F#
G /// /// D - Em /// then tack on the following descent riff
( or play these chords instead D/ C/ Bm7/ Am7 )
You just "pass through" the D to the Em in the above progression.

Descent riff

E|--------------------|
B|---7---5---3---1----|
G|--------------------|
D|---7---5---4---2----|
A|--------------------|
E|--------------------|

VERSE

G // Bm - C / G / D /// ////
(just pass through the Bm...play this whole progression twice...
after the second measures of D, play the following chord to lead
into the upcoming Em

E|--x--|
B|--7--| 3-|
G|--8--| 4-|
D|--7--| 2-|
A|--6--| 1-|
E|--x--|

PD-C HORUS
Em /// G /// Em /// B7 ///
C /// Db dim /// D/ C/ Bm7/ Am7
                  ^
(or use the descent riff again here)

(D dim =
E|--3--| 1---|
B|--5--| 1+4-|
G|--3--| 1---|
D|--5--| 1+3-|
A|--4--| 1+2-|
E|--x--|

(barre the 3rd fret with index and place fingers 2-3 and 4
on the indicated frets)

There's also a sliding riff on the G after the Em in the pre-chorus
This could be off, but it should be close enough.

E|--12/7--------| 2 then 2 then 2 then 1-|
B|--------7/8----------------------------|
G|--12/7---------------------------------| use 3nd finger throughout
D|--------7/9----------------------------|
A|---------------------------------------|
E|---------------------------------------|

CHORUS
G / D / C /// (play 3 times)
F / F# / G /// (play this quiet part Hendrix-style)
E|-----------------------------------------|
B|---10----10----------11----11--------12--|
G|---10----10----------11----11--------12--|
D|---10----10h12p10----11----11h13p11--12--|
A|---10h12-------------11h13---------------|
E|-----------------------------------------|

Repeat the verse /  pre-chorus / chorus (with hendrix riff 2x on the second pass)
and end like the beginning of the intro but finish on the Em.

G /// D Em